{"id":138,"date":"2010-04-17T23:12:50","date_gmt":"2010-04-18T08:12:50","guid":{"rendered":"\/blog\/?p=138"},"modified":"2023-09-21T09:39:20","modified_gmt":"2023-09-21T00:39:20","slug":"openssl-api%eb%a5%bc-%ec%9d%b4%ec%9a%a9%ed%95%9c-%eb%b3%b4%ec%95%88-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%98%eb%b0%8d","status":"publish","type":"post","link":"https:\/\/hasu0707.duckdns.org\/blog\/?p=138","title":{"rendered":"OpenSSL API\ub97c \uc774\uc6a9\ud55c \ubcf4\uc548 \ud504\ub85c\uadf8\ub798\ubc0d"},"content":{"rendered":"\n<BLOCKQUOTE>\ubcf4\uc548 \ud1b5\uc2e0\uc6a9 \uc624\ud508 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc778 OpenSSL\uc6a9 API\ub97c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6b4\ub2e4\ub294 \uac83\uc740 \ud798\ub4e0 \uc77c\uc785\ub2c8\ub2e4. \ubb38\uc11c\ud654\uac00 \uc544\uc9c1 \ub35c \ub418\uc5b4\uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774 \uae00\uc744 \ud1b5\ud574\uc11c \uc774\ub97c \uadf9\ubcf5\ud574 \ubd05\uc2dc\ub2e4. \uae30\ubcf8 \uc5f0\uacb0\uc744 \uc124\uc815\ud55c \ud6c4\uc5d0, OpenSSL\uc758 BIO \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubcf4\uc548\/\ube44\ubcf4\uc548 \uc5f0\uacb0\uc744 \uad6c\ucd95\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6cc\ubd05\uc2dc\ub2e4. \uc5d0\ub7ec \ud0d0\uc9c0\uc5d0 \ub300\ud55c \ubd80\ubd84\ub3c4 \uc124\uba85\ud569\ub2c8\ub2e4.<\/BLOCKQUOTE><!--START RESERVED FOR FUTURE USE INCLUDE FILES--><!-- include java script once we verify teams wants to use this and it will work on dbcs and cyrillic characters --><!--END RESERVED FOR FUTURE USE INCLUDE FILES-->\n<P>OpenSSL API\uc640 \uad00\ub828\ud55c \ubb38\uc11c\ub294 \uc57d\uac04 \ubaa8\ud638\ud558\ub2e4. OpenSSL\uc758 \uc0ac\uc6a9\ubc95\uc5d0 \ub300\ud55c \ud29c\ud1a0\ub9ac\uc5bc\ub3c4 \ub9ce\uc9c0 \uc54a\uc73c\ubbc0\ub85c, \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc774\ub97c \uc2e4\ud589\ud558\ub294 \uac83\uc740 \ucd08\ubcf4\uc790\uc5d0\uac8c\ub294 \ud798\ub4e0 \uc77c\uc774\ub2e4. \uadf8\ub807\ub2e4\uba74, OpenSSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \uae30\ubcf8 \ubcf4\uc548 \uc5f0\uacb0\uc744 \uc5b4\ub5bb\uac8c \uad6c\ud604\ud560 \uac83\uc778\uac00? \uc774 \uac00\uc774\ub4dc\uc5d0\uc11c \uc774\ub7ec\ud55c \ubb38\uc81c\ub97c \ud480\uc5b4\ubcf4\uc790. <\/P>\n<P>OpenSSL\uc744 \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6b0\ub294 \uac83\uacfc \uad00\ub828\ub41c \ubb38\uc81c \uc911 \ud558\ub098\ub294 \ubb38\uc11c\ud654\uac00 \ub35c \ub418\uc5b4\uc788\ub2e4\ub294 \uc810\uc774\ub2e4. \ubd88\uc644\uc804\ud55c API \ubb38\uc11c\ub294 \uac1c\ubc1c\uc790\uac00 API\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uac8c \ud55c\ub2e4. \ud558\uc9c0\ub9cc, OpenSSL\uc740 \uc5ec\uc804\ud788 \uc874\uc7ac\ud558\uace0 \uac15\ub825\ud558\ub2e4. \uc65c\uc77c\uae4c? <\/P>\n<P>OpenSSL\uc740 \ubcf4\uc548 \ud1b5\uc2e0\uc6a9 \uc624\ud508 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub85c \uc720\uba85\ud558\ub2e4. Google\uc5d0\uc11c \"SSL library\"\ub97c \uac80\uc0c9\ud558\uba74 OpenSSL\uc774 \uc0c1\uc704\ub85c \ub9ac\ud134\ub41c\ub2e4. Eric Young\uacfc Tim Hudson\uc774 \uac1c\ubc1c\ud55c SSLeay \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c \ud30c\uc0dd\ud558\uc5ec, 1998\ub144\uc5d0 \uc2dc\uc791\ub418\uc5c8\ub2e4. \ub2e4\ub978 SSL \ud234\ud0b7\uc73c\ub85c\ub294 GNU General Public License\ud558\uc5d0\uc11c \ubc30\ud3ec\ub418\ub294 GNU TLS\uc640, Mozilla Network Security Services (NSS) (<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html#Resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc<\/A>)\uac00 \uc788\ub2e4. <\/P>\n<P>\uadf8\ub807\ub2e4\uba74, OpenSSL\uc774 GNU TLS, Mozilla NSS \ub4f1 \ubcf4\ub2e4 \ub098\uc740 \uc810\uc740 \ubb34\uc5c7\uc778\uac00? \ub77c\uc774\uc13c\uc2f1\uc774 \ud55c \ubaab\uc744 \ud55c\ub2e4. (<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html#Resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc<\/A>) \uac8c\ub2e4\uac00, GNS TLS\ub294 TLS v1.0\uacfc SSL v3.0\ub9cc \uc9c0\uc6d0\ud55c\ub2e4. \uadf8 \uc774\uc0c1\uc740 \uc9c0\uc6d0\ud558\uc9c0 \uc54a\ub294\ub2e4.<\/P>\n<P>Mozilla NSS\ub294 Mozilla Public License\uc640 GNU GPL \ud558\uc5d0\uc11c \ubc30\ud3ec\ub418\uace0, \uac1c\ubc1c\uc790\uac00 \uc120\ud0dd\ud560 \uc218 \uc788\ub2e4. Mozilla NSS\ub294 OpenSSL\ubcf4\ub2e4 \ud06c\uace0, \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uad6c\ud604\ud558\ub824\uba74 \ub2e4\ub978 \uc678\ubd80 \ub77c\uc774\ube0c\ub7ec\ub9ac\uac00 \ud544\uc694\ud558\ub2e4. \ud558\uc9c0\ub9cc OpenSSL\uc740 \ub3c5\ub9bd\uc801\uc774\ub2e4. OpenSSL\uacfc \ub9c8\ucc2c\uac00\uc9c0\ub85c, \ub300\ubd80\ubd84\uc758 NSS API\ub294 \ubb38\uc11c\ud654\uac00 \ub418\uc5b4\uc788\uc9c0 \uc54a\ub2e4. Mozilla NSS\ub294 PKCS #11 \uc9c0\uc6d0\uc744 \uac16\uace0 \uc788\ub294\ub370, \uc774\ub294 Smart Cards \uac19\uc740 \uc554\ud638 \ud1a0\ud070\uc5d0 \uc0ac\uc6a9\ub41c\ub2e4. OpenSSL\uc740 \uc774\ub7ec\ud55c \uc9c0\uc6d0\uc774 \ubd80\uc871\ud558\ub2e4. <\/P>\n<P><a class=\"con_link\" name=\"N10145\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\uc870\uac74<\/SPAN><\/A><\/P>\n<P>\uc774 \uae00\uc744 \ucda9\ubd84\ud788 \ud65c\uc6a9\ud558\ub824\uba74, <\/P>\n<UL>\n<LI>C \ud504\ub85c\uadf8\ub798\ubc0d\uc5d0 \ub2a5\uc219\ud574\uc57c \ud55c\ub2e4. \n<LI>\uc778\ud130\ub137 \ud1b5\uc2e0\uc5d0 \ub300\ud574 \uc798 \uc54c\uace0 \uc788\uc5b4\uc57c \ud558\uace0, \uc778\ud130\ub137\uc5d0\uc11c \uc2e4\ud589\ub418\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc791\uc131\ud560 \uc218 \uc788\uc5b4\uc57c \ud55c\ub2e4. <\/LI><\/UL>\n<P>OpenSSL\uc5d0 \ub300\ud55c \uc644\ubcbd\ud55c \uc774\ud574\uac00 \uc804\uc801\uc73c\ub85c \ud544\uc694\ud55c \uac83\uc740 \uc544\ub2c8\ub2e4. SSL\uc5d0 \ub300\ud55c \uac04\ub7b5\ud55c \uc124\uba85\uc740 \ub098\uc911\uc5d0 \uc81c\uacf5\ud558\uaca0\ub2e4. SSL\uc5d0 \ub300\ud55c \uc0c1\uc138\ud55c \uc124\uba85\uc740 <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html#Resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc \uc139\uc158<\/A>\uc744 \ucc38\uc870\ud558\ub77c. \uc554\ud638\ubc95\uc5d0 \ub300\ud574 \uc54c\uace0 \uc788\uc5b4\ub3c4 \ub3c4\uc6c0\uc774 \ub418\uc9c0\ub9cc, \ud544\uc218\uc801\uc778 \uac83\uc740 \uc544\ub2c8\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1015E\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>SSL\uc774\ub780 \ubb34\uc5c7\uc778\uac00?<\/SPAN><\/A><\/P>\n<P>SSL\uc740 Secure Sockets Layer\uc758 \uc57d\uc790\uc774\ub2e4. \uc778\ud130\ub137 \uc0c1\uc758 \ubcf4\uc548 \ud1b5\uc2e0 \ud45c\uc900\uc774\uace0, \ub370\uc774\ud130 \uc554\ud638\ud654\uc640 \ud504\ub85c\ud1a0\ucf5c\uc744 \ud1b5\ud569\ud55c\ub2e4. \ub370\uc774\ud130\ub294 \ucef4\ud4e8\ud130\ub97c \ub5a0\ub098\uae30 \uc804\uc5d0 \uc554\ud638\ud654 \ub418\uace0, \ubaa9\uc801\uc9c0\uc5d0 \ub3c4\ucc29\ud558\uba74 \uc554\ud638\uac00 \ud574\ub3c5\ub41c\ub2e4. \uc778\uc99d\uacfc \uc554\ud638 \uc54c\uace0\ub9ac\uc998\uc774 \ub4a4\ub97c \ubc1b\uce58\uace0 \uc788\uace0, OpenSSL\uc5d0\uc11c\ub294 \uc774 \ub450 \uac00\uc9c0 \ubaa8\ub450\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4. <\/P>\n<P>\uc774\ub860\uc0c1\uc73c\ub85c, \uc554\ud638\ud654\ub41c \ub370\uc774\ud130\uac00 \ubaa9\uc801\uc9c0\uc5d0 \ub3c4\ucc29\ud558\uae30 \uc804\uc5d0 \uc778\ud130\uc149\ud2b8 \ub418\uac70\ub098 \ub3c4\uccad\ub418\uba74, \uadf8 \ub370\uc774\ud130\ub97c \ud06c\ub798\ud0b9 \ud560 \ud76c\ub9dd\uc774 \uc5c6\ub2e4. \ucef4\ud4e8\ud130 \uc18d\ub3c4\uac00 \ube68\ub77c\uc9c0\uace0, \uc554\ud638 \ud574\ub3c5\ubc95\uc774 \uc9c4\ubcf4\ud558\uba74\uc11c SSL\uc5d0 \uc0ac\uc6a9\ub418\ub294 \uc554\ud638 \ud504\ub85c\ud1a0\ucf5c\uc744 \ud06c\ub798\ud0b9 \ud560 \uae30\ud68c\uac00 \ub298\uc5b4\ub098\uace0 \uc788\ub2e4. <\/P>\n<P>SSL\uacfc \ubcf4\uc548 \ud1b5\uc2e0\uc740 \uc778\ud130\ub137 \uc0c1\uc758 \ubaa8\ub4e0 \ud504\ub85c\ud1a0\ucf5c(HTTP, POP3, FTP)\uc5d0 \uc0ac\uc6a9\ub420 \uc218 \uc788\ub2e4. SSL\uc740 \ud154\ub137 \uc138\uc158\uc744 \ubcf4\uc548\ud654 \ud558\ub294\ub370 \uc0ac\uc6a9\ub420 \uc218 \uc788\ub2e4. SSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc5f0\uacb0\uc774 \ubcf4\uc548\ud654 \ub420 \uc218 \uc788\uc9c0\ub9cc, \ubaa8\ub4e0 \uc885\ub958\uc758 \uc5f0\uacb0\uc5d0 SSL\uc744 \uc0ac\uc6a9\ud560 \ud544\uc694\ub294 \uc5c6\ub2e4. \uc5f0\uacb0\uc774 \uc911\uc694\ud55c \uc815\ubcf4\ub97c \uc804\ub2ec\ud560 \uacbd\uc6b0\uc5d0\ub9cc \uc0ac\uc6a9\ub418\uc5b4\uc57c \ud55c\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1016D\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>OpenSSL\uc774\ub780 \ubb34\uc5c7\uc778\uac00?<\/SPAN><\/A><\/P>\n<P>OpenSSL\uc740 \ub2e8\uc21c\ud55c SSL \uc774\uc0c1\uc774\ub2e4. \uba54\uc2dc\uc9c0 \ub2e4\uc774\uc81c\uc2a4\ud2b8, \ud30c\uc77c\uc758 \uc554\ud638 \ubc0f \uc554\ud638 \ud574\ub3c5, \ub514\uc9c0\ud138 \uc778\uc99d, \ub514\uc9c0\ud138 \uc11c\uba85, \ub79c\ub364 \ub118\ubc84\ub97c \uc218\ud589\ud55c\ub2e4. \uc774 \uc678\uc5d0\ub3c4 OpenSSL \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\ub294 \ub354 \ub9ce\uc740 \uac83\ub4e4\uc774 \uc788\uc9c0\ub9cc, \uc774 \uae00\uc5d0 \ub2e4 \uc18c\uac1c\ud560 \uc218\ub294 \uc5c6\ub2e4. <\/P>\n<P>OpenSSL\uc740 \ub2e8\uc21c\ud55c API \uc774\uc0c1\uc774\uace0, \uba85\ub839\ud589 \ud1a8\uc774\ub2e4. \uba85\ub839\ud589 \ud234\uc740 API\uc640 \uac19\uc740 \uc77c\uc744 \ud560 \uc218 \uc788\uc9c0\ub9cc, SSL \uc11c\ubc84\uc640 \ud074\ub77c\uc774\uc5b8\ud2b8\ub97c \ud14c\uc2a4\ud2b8\ud558\ub294 \uae30\ub2a5\ub3c4 \uc788\ub2e4. \uac1c\ubc1c\uc790\uc5d0\uac8c OpenSSL\uc758 \uae30\ub2a5\uc5d0 \ub300\ud55c \uc544\uc774\ub514\uc5b4\ub3c4 \uc81c\uacf5\ud55c\ub2e4. OpenSSL \uba85\ub839\ud589 \ud234\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud55c \ub0b4\uc6a9\uc740 <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html#Resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc<\/A> \uc139\uc158\uc744 \ucc38\uc870\ud558\ub77c. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1017D\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc5ec\ub7ec\ubd84\uc5d0\uac8c \ud544\uc694\ud55c \uac83<\/SPAN><\/A><\/P>\n<P>\uba3c\uc800, \ucd5c\uc2e0 \ubc84\uc804\uc758 OpenSSL\uc774 \ud544\uc694\ud558\ub2e4. \ucc38\uace0\uc790\ub8cc \uc139\uc158\uc5d0\uc11c \uc5ec\ub7ec\ubd84\uc774 \uc9c1\uc811 \ucef4\ud30c\uc77c \ud560 \ucd5c\uc2e0 \uc18c\uc2a4 \ucf54\ub4dc\ub97c \uc5bb\uac70\ub098, \ucef4\ud30c\uc77c \ud558\ub294\ub370 \uc2dc\uac04\uc744 \ub0ad\ube44\ud558\uace0 \uc2f6\uc9c0 \uc54a\ub2e4\uba74 \ucd5c\uc2e0 \ubc84\uc804\uc758 \ubc14\uc774\ub108\ub9ac \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc5bb\uc744 \uc218 \uc788\ub2e4. \uc548\uc804\uc744 \uc0dd\uac01\ud55c\ub2e4\uba74, \ucd5c\uc2e0 \uc18c\uc2a4 \ucf54\ub4dc\ub97c \ub2e4\uc6b4\ub85c\ub4dc \ud558\uc5ec, \uc5ec\ub7ec\ubd84\uc774 \uc9c1\uc811 \ucef4\ud30c\uc77c \ud558\ub294 \uac83\uc774 \uc88b\ub2e4. \ubc14\uc774\ub108\ub9ac \ubc30\ud3ec\ud310\uc740 OpenSSL \uac1c\ubc1c\uc790\uac00 \uc544\ub2cc \uc11c\ub4dc \ud30c\ud2f0\uc5d0 \uc758\ud574 \ucef4\ud30c\uc77c \ubc0f \ubc30\ud3ec\ub41c\ub2e4. <\/P>\n<P>\uc77c\ubd80 \ub9ac\ub205\uc2a4 \ubc30\ud3ec\ud310\uc5d0\ub294 \ubc14\uc774\ub108\ub9ac \ubc84\uc804\uc758 OpenSSL\uc774 \ud3ec\ud568\ub418\ub294\ub370, \uc774\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac \uc0ac\uc6a9\ubc95\uc744 \ubc30\uc6b8 \ub54c \ud3b8\ub9ac\ud558\ub2e4. \ud558\uc9c0\ub9cc, \ucd5c\uc2e0 \ubc84\uc804\uc778\uc9c0\ub97c \ud655\uc778\ud574\uc57c \ud55c\ub2e4. <\/P>\n<P>RPM (Red Hat, Mandrake)\uc5d0\uc11c \uc124\uce58\ub41c \ub9ac\ub205\uc2a4 \ubc30\ud3ec\ud310\uc758 \uacbd\uc6b0, \ubc30\ud3ec\ud310 \uc81c\uc791\uc790\uac00 \ub9cc\ub4e0 RPM \ud328\ud0a4\uc9c0\ub97c \ud1b5\ud574 OpenSSL \ubc30\ud3ec\ud310\uc744 \uc5c5\ub370\uc774\ud2b8 \ud55c\ub2e4. \uc548\uc804\uc744 \uc704\ud574\uc11c, \ucd5c\uc2e0 \ubc84\uc804\uc758 \ubc30\ud3ec\ud310\uc73c\ub85c \uc5c5\ub370\uc774\ud2b8 \ud558\ub294 \uac83\uc774 \uc911\uc694\ud558\ub2e4. \ucd5c\uc2e0 \ubc84\uc804\uc758 OpenSSL\uc744 \ubc30\ud3ec\ud310\uc5d0 \uc0ac\uc6a9\ud560 \uc218 \uc5c6\ub2e4\uba74, \uc5ec\ub7ec\ubd84\uc774 \uc624\ubc84\ub77c\uc774\ud2b8 \ud55c \ud30c\uc77c\ub4e4\uc740 \uc2e4\ud589 \ud30c\uc77c\uc774 \uc544\ub2cc \ub77c\uc774\ube0c\ub7ec\ub9ac\ub4e4\uc774\ub2e4. OpenSSL\uc758 FAQ \ubb38\uc11c\ub97c \ucc38\uc870\ud558\ub77c. <\/P>\n<P>OpenSSL\uc740 \ubaa8\ub4e0 \ud50c\ub7ab\ud3fc\uc5d0\uc11c \uacf5\uc2dd\uc801\uc73c\ub85c \uc9c0\uc6d0\uc774 \ub418\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4. \ud06c\ub85c\uc2a4 \ud50c\ub7ab\ud3fc \ud638\ud658\uc131\uc744 \uc704\ud55c \ub178\ub825\uc774 \uc9c4\ud589 \uc911\uc774\uc9c0\ub9cc, OpenSSL\uc740 \ucef4\ud4e8\ud130 \ub610\ub294 OS\uc5d0\uc11c \uc791\ub3d9\ud558\uc9c0 \uc54a\uc744 \uc218 \uc788\ub2e4. \uc9c0\uc6d0\ub418\ub294 \ud50c\ub7ab\ud3fc\uc744 \uc54c\uc544\ubcf4\ub824\uba74 OpenSSL \uc6f9 \uc0ac\uc774\ud2b8(<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html#Resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc<\/A>)\ub97c \ucc38\uc870\ud558\ub77c. <\/P>\n<P>OpenSSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc778\uc99d \uc694\uccad \ubc0f \ub514\uc9c0\ud138 \uc778\uc99d\uc744 \ub9cc\ub4e0\ub2e4\uba74, \uc124\uc815 \ud30c\uc77c\uc774 \uc0dd\uc131\ub418\uc5b4\uc57c \ud55c\ub2e4. <CODE>openssl.cnf<\/CODE>\ub77c\uace0 \ud558\ub294 \ud15c\ud50c\ub9bf \ud30c\uc77c\uc774 OpenSSL \ud328\ud0a4\uc9c0\uc758 <CODE>apps<\/CODE> \ud3f4\ub354\uc5d0\uc11c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uc124\uba85\ud558\uc9c0 \uc54a\uaca0\ub2e4. \ud558\uc9c0\ub9cc, \uc774 \ud15c\ud50c\ub9bf \ud30c\uc77c\uc740 \uc8fc\uc11d\uc774 \uc798 \ub2ec\ub824\uc788\uace0 \uc778\ud130\ub137 \uac80\uc0c9\uc744 \ud1b5\ud574 \ub9ce\uc740 \ud29c\ud1a0\ub9ac\uc5bc\uc744 \ucc3e\uc744 \uc218 \uc788\ub2e4.<\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1019E\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ud5e4\ub354\uc640 \ucd08\uae30\ud654<\/SPAN><\/A><\/P>\n<P>\ubcf8 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c \uc0ac\uc6a9\ub420 \ud5e4\ub354\ub294 \ub2e8 \uc138 \uac00\uc9c0\uc774\ub2e4. (ssl.h, bio.h, err.h) \uc774 \ubaa8\ub4e0 \uac83\uc774 openssl \ud558\uc704 \ub514\ub809\ud1a0\ub9ac\uc5d0 \uc788\uace0, \uc138 \uac1c \ubaa8\ub450 \ud504\ub85c\uc81d\ud2b8\ub97c \uac1c\ubc1c\ud558\ub294\ub370 \ud544\uc694\ud55c \uac83\ub4e4\uc774\ub2e4. OpenSSL \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \ucd08\uae30\ud654 \ud558\ub294\ub370 \ud544\uc694\ud55c \ub2e8 \uc138 \ub77c\uc778\ub4e4\uc774 \uc788\ub2e4. Listing 1\uc5d0 \ubaa8\ub450 \ub9ac\uc2a4\ud305 \ub418\uc5b4 \uc788\ub2e4. \uae30\ud0c0 \ud5e4\ub354 \ubc0f \ucd08\uae30\ud654 \ud568\uc218\ub4e4\uc740 \ub2e4\ub978 \uae30\ub2a5\ub4e4\uc5d0 \ud544\uc694\ud558\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N101A7\" target=\"_blank\" rel=\"noopener\"><B>Listing 1. \ud544\uc218 \ud5e4\ub354<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>\/* OpenSSL headers *\/<br \/><br \/>#include \"openssl\/bio.h\"<br \/>#include \"openssl\/ssl.h\"<br \/>#include \"openssl\/err.h\"<br \/><br \/>\/* Initializing OpenSSL *\/<br \/><br \/>SSL_load_error_strings();<br \/>ERR_load_BIO_strings();<br \/>OpenSSL_add_all_algorithms();<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N101B1\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ube44\ubcf4\uc548 \uc5f0\uacb0 \uad6c\ucd95\ud558\uae30<\/SPAN><\/A><\/P>\n<P>OpenSSL\uc740 BIO\ub77c\uace0 \ud558\ub294 \ucd94\uc0c1\ud654 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud30c\uc77c\uacfc \uc18c\ucf13\uc744 \ud3ec\ud568\ud55c \ub2e4\uc591\ud55c \uc885\ub958\uc758 \ud1b5\uc2e0\uc744 \ubcf4\uc548 \ub610\ub294 \ube44\ubcf4\uc548 \ubc29\uc2dd\uc73c\ub85c \ucc98\ub9ac\ud55c\ub2e4. \ub610\ud55c UU \ub610\ub294 Base64 \ucf54\ub529\uc6a9 \ud544\ud130\ub85c\uc11c\ub3c4 \uc124\uc815\ub420 \uc218 \uc788\ub2e4. <\/P>\n<P>BIO \ub77c\uc774\ube0c\ub7ec\ub9ac\ub294 \uc774 \uae00\uc5d0\uc11c \uc124\uba85\ud558\uae30\uc5d0\ub294 \uc57d\uac04 \ubcf5\uc7a1\ud558\uae30 \ub54c\ubb38\uc5d0, \ud544\uc694\ud55c \ubd80\ubd84\ub9cc \uc124\uba85\ud558\uae30\ub85c \ud558\uaca0\ub2e4. \uba3c\uc800, \ud45c\uc900 \uc18c\ucf13 \uc5f0\uacb0\uc744 \uc124\uc815\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud558\uaca0\ub2e4. BSD \uc18c\ucf13 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83 \ubcf4\ub2e4 \uc801\uc740 \ub77c\uc778\uc774 \ub4e4\uc5b4\uac04\ub2e4. <\/P>\n<P>\ubcf4\uc548\uc774\ub4e0 \ube44\ubcf4\uc548\uc774\ub4e0 \uc5f0\uacb0\uc744 \uad6c\ucd95\ud558\uae30 \uc804\uc5d0, BIO \uac1d\uccb4\uc6a9 \ud3ec\uc778\ud130\uac00 \uc0dd\uc131\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774\ub294 \ud45c\uc900 C\uc758 \ud30c\uc77c \uc2a4\ud2b8\ub9bc\uc6a9 FILE \ud3ec\uc778\ud130\uc640 \ube44\uc2b7\ud558\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N101C0\" target=\"_blank\" rel=\"noopener\"><B>Listing 2. \ud3ec\uc778\ud130<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>BIO * bio;<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P><a class=\"con_link\" name=\"N101CA\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\uc5f0\uacb0\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\uc0c8\ub85c\uc6b4 \uc5f0\uacb0\uc744 \ub9cc\ub4e4\ub824\uba74 <CODE>BIO_new_connect<\/CODE>\ub97c \ud638\ucd9c\ud574\uc57c \ud55c\ub2e4. \uac19\uc740 \ud638\ucd9c\uc5d0 \ud638\uc2a4\ud2b8\ub124\uc784\uacfc \ud3ec\ud2b8\ub97c \uc124\uc815\ud574\uc57c \ud55c\ub2e4. (Listing 3) \uc774\uac83\uc73c\ub85c \uc5f0\uacb0\uc744 \uc2dc\ub3c4\ud560 \uac83\uc774\ub2e4. \ub610\ud55c \uc774\uac83\uc744 \ub450 \uac1c\uc758 \uac1c\ubcc4 \ud638\ucd9c\ub85c \ub098\ub20c \uc218 \uc788\ub2e4. <CODE>BIO_new_connect<\/CODE>\ub294 \uc5f0\uacb0\uc744 \ub9cc\ub4e4\uace0 \ud638\uc2a4\ud2b8\ub124\uc784\uc744 \uc124\uc815\ud558\uace0, <CODE>BIO_set_conn_port<\/CODE> (\ub610\ub294 <CODE>BIO_set_conn_int_port<\/CODE>)\ub294 \ud3ec\ud2b8 \ub118\ubc84\ub97c \uc124\uc815\ud55c\ub2e4. <\/P>\n<P>\uc77c\ub2e8 \ud638\uc2a4\ud2b8\ub124\uc784\uacfc \ud3ec\ud2b8 \ub118\ubc84\uac00 BIO\uc5d0 \uc124\uc815\ub418\uba74, \uc5f0\uacb0\uc744 \uc2dc\ub3c4\ud560 \uac83\uc774\ub2e4. \ubc29\ubc95\uc740 \uc5c6\ub2e4. BIO \uac1d\uccb4\ub97c \uc0dd\uc131\ud558\ub294\ub370 \ubb38\uc81c\uac00 \uc788\ub2e4\uba74, \ud3ec\uc778\ud130\ub294 NULL\uc774 \ub420 \uac83\uc774\ub2e4. <CODE>BIO_do_connect<\/CODE>\ub85c \ud638\ucd9c\ud558\uc5ec \uc5f0\uacb0\uc774 \uc131\uacf5\ud588\ub294\uc9c0\ub97c \ud655\uc778\ud558\uac8c \ub420 \uac83\uc774\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N101EA\" target=\"_blank\" rel=\"noopener\"><B>Listing 3. \uc5f0\uacb0 \uc0dd\uc131 \ubc0f \uc2dc\uc791\ud558\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>bio = BIO_new_connect(\"hostname:port\");<br \/>if(bio == NULL)<br \/>{<br \/>    \/* Handle the failure *\/<br \/>}<br \/><br \/>if(BIO_do_connect(bio) &lt;= 0)<br \/>{<br \/>    \/* Handle failed connection *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uccab \ubc88\uc9f8 \ub77c\uc778\uc740 \uc9c0\uc815\ub41c \ud638\uc2a4\ud2b8\ub124\uc784\uacfc \ud3ec\ud2b8\ub85c \uc0c8\ub85c\uc6b4 BIO \uac1d\uccb4\ub97c \uc0dd\uc131\ud55c\ub2e4. \uc608\ub97c \ub4e4\uc5b4, www.ibm.com\uc5d0\uc11c \ud3ec\ud2b8 80\uc73c\ub85c \uc5f0\uacb0\ud558\ub824\uba74, \uc2a4\ud2b8\ub9c1\uc740 <CODE>www.ibm.com:80<\/CODE>\uc774 \ub420 \uac83\uc774\ub2e4. <CODE>BIO_do_connect<\/CODE>\ub97c \ud638\ucd9c\ud558\uc5ec \uc5f0\uacb0\uc774 \uc131\uacf5\ud588\ub294\uc9c0 \uc5ec\ubd80\ub97c \uac80\uc0ac\ud55c\ub2e4. \uc5d0\ub7ec \uc2dc 0 \ub610\ub294 -1\uc744 \ub9ac\ud134\ud55c\ub2e4. <\/P>\n<P><a class=\"con_link\" name=\"N101FF\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\uc11c\ubc84\uc640 \ud1b5\uc2e0\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\uc18c\ucf13\uc774\ub4e0 \ud30c\uc77c\uc774\ub4e0 \uc0c1\uad00\uc5c6\uc774, BIO \uac1d\uccb4\ub97c \uc77d\uace0 \uc4f0\ub294 \uac83\uc740 \ub450 \uac1c\uc758 \ud568\uc218, <CODE>BIO_read<\/CODE>\uc640 <CODE>BIO_write<\/CODE>\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc218\ud589\ub41c\ub2e4. \uac04\ub2e8\ud558\uc9c0 \uc54a\uc740\uac00? <\/P>\n<P><CODE>BIO_read<\/CODE>\ub294 \uc11c\ubc84\uc5d0\uc11c \ud2b9\uc815 \uc22b\uc790\ub97c \uc77d\ub294\ub2e4. \ubc14\uc774\ud2b8\uac00 \uc77d\ub294 \uc22b\uc790, \ub610\ub294 0 \ub610\ub294-1\uc744 \ub9ac\ud134\ud55c\ub2e4. Blocking connection\uc5d0\uc11c, 0\uc774 \ub9ac\ud134\ub418\uc5c8\ub2e4\ub294 \uac83\uc740 \uc5f0\uacb0\uc774 \ub2eb\ud614\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud558\uace0, -1\uc740 \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud588\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud55c\ub2e4. Non-blocking connection\uc5d0\uc11c, 0\uc758 \ub9ac\ud134\uc740 \uc5b4\ub5a4 \ub370\uc774\ud130\ub3c4 \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uc74c\uc744 \ub098\ud0c0\ub0b4\uace0, -1\uc740 \uc5d0\ub7ec\ub97c \ub098\ud0c0\ub0b8\ub2e4. \uc5d0\ub7ec\uac00 \ubcf5\uad6c \uac00\ub2a5\ud55c \uac83\uc778\uc9c0 \uc5ec\ubd80\ub97c \ud30c\uc545\ud558\ub824\uba74 <CODE>BIO_should_retry<\/CODE>\ub97c \ud638\ucd9c\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N1021B\" target=\"_blank\" rel=\"noopener\"><B>Listing 4. \uc5f0\uacb0\uc5d0\uc11c \uc77d\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>int x = BIO_read(bio, buf, len);<br \/>if(x == 0)<br \/>{<br \/>    \/* Handle closed connection *\/<br \/>}<br \/>else if(x &lt; 0)<br \/>{<br \/>   if(! BIO_should_retry(bio))<br \/>    {<br \/>        \/* Handle failed read here *\/<br \/>    }<br \/><br \/>    \/* Do something to handle the retry *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P><CODE>BIO_write<\/CODE>\ub294 \uc18c\ucf13\uc5d0 \ubc14\uc774\ud2b8\ub97c \uc791\uc131\ud55c\ub2e4. \uc2e4\uc81c\ub85c \uc791\uc131\ub41c \ubc14\uc774\ud2b8 \uc22b\uc790, \ub610\ub294 0 \ub610\ub294 -1\uc744 \ub9ac\ud134\ud55c\ub2e4. <CODE>BIO_read<\/CODE>\uc640 \ub9c8\ucc2c\uac00\uc9c0\ub85c, 0 \ub610\ub294 -1\uc774 \ubc18\ub4dc\uc2dc \uc5d0\ub7ec\ub97c \ub098\ud0c0\ub0b4\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4. <CODE>BIO_should_retry<\/CODE>\ub294 \uc774\ub97c \ud30c\uc545\ud558\ub294 \ubc29\ubc95\uc774\ub2e4. \uc4f0\uae30 \uc5f0\uc0b0\uc774 \uc7ac\uc2dc\ub3c4 \ub418\uba74, \uc804\uacfc \ub611 \uac19\uc740 \ub9e4\uac1c\ubcc0\uc218\uac00 \uc788\uc5b4\uc57c \ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N10234\" target=\"_blank\" rel=\"noopener\"><B>Listing 5. \uc5f0\uacb0\uc5d0 \uc791\uc131\ud558\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>if(BIO_write(bio, buf, len) &lt;= 0)<br \/>{<br \/>    if(! BIO_should_retry(bio))<br \/>    {<br \/>        \/* Handle failed write here *\/<br \/>    }<br \/><br \/>    \/* Do something to handle the retry *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P><a class=\"con_link\" name=\"N1023E\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\uc5f0\uacb0 \ub2eb\uae30<\/SPAN><\/A><\/P>\n<P>\uc5f0\uacb0\uc744 \ub2eb\ub294 \uac83\ub3c4 \ub2e8\uc21c\ud558\ub2e4. \ub450 \uac00\uc9c0 \ubc29\ubc95(<CODE>BIO_reset<\/CODE> \ub610\ub294 <CODE>BIO_free_all<\/CODE>) \uc911, \ud558\ub098\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc5f0\uacb0\uc744 \ub2eb\uc744 \uc218 \uc788\ub2e4. \uac1d\uccb4\ub97c \uc7ac\uc0ac\uc6a9 \ud558\ub824\uba74, \uccab \ubc88\uc9f8 \uac83\uc744 \uc0ac\uc6a9\ud55c\ub2e4. \uc7ac\uc0ac\uc6a9 \ud558\uc9c0 \uc54a\uc73c\ub824\uba74 \ub450 \ubc88\uc9f8\ub97c \uc0ac\uc6a9\ud55c\ub2e4. <\/P>\n<P><CODE>BIO_reset<\/CODE>\uc740 \uc5f0\uacb0\uc744 \ub2eb\uace0 BIO \uac1d\uccb4\uc758 \ub0b4\ubd80 \uc0c1\ud0dc\ub97c \ub9ac\uc14b\ud558\uc5ec \uc5f0\uacb0\uc774 \uc7ac\uc0ac\uc6a9 \ub420 \uc218 \uc788\ub3c4\ub85d \ud55c\ub2e4. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc804\uccb4\uc5d0 \uac19\uc740 \uac1d\uccb4\ub97c \uc0ac\uc6a9\ud558\uace0\uc790 \ud55c\ub2e4\uba74 \uc774\uac83\uc774 \uc720\uc6a9\ud558\ub2e4. \uc774\uac83\uc740 \uac12\uc744 \ub9ac\ud134\ud558\uc9c0 \uc54a\ub294\ub2e4. <\/P>\n<P><CODE>BIO_free_all<\/CODE>\uc740 \uba85\uce6d \uadf8\ub300\ub85c\uc774\ub2e4. \ub0b4\ubd80 \uad6c\uc870\ub97c \ud480\uace0 \ubaa8\ub4e0 \uad00\ub828 \uba54\ubaa8\ub9ac\ub4e4\uc744 \ub9b4\ub9ac\uc2a4 \ud55c\ub2e4. \uc5ec\uae30\uc5d0\ub294 \uc81c\ud734 \uc18c\ucf13\uc744 \ub2eb\ub294 \uac83\ub3c4 \ud3ec\ud568\ub41c\ub2e4. BIO\uac00 \ud074\ub798\uc2a4\uc5d0 \uc0bd\uc785\ub418\uba74, \uc774\ub294 \ud074\ub798\uc2a4\uc758 \ub514\uc2a4\ud2b8\ub7ed\ud130\uc5d0 \uc0ac\uc6a9\ub41c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N1025D\" target=\"_blank\" rel=\"noopener\"><B>Listing 6. \uc5f0\uacb0 \ub2eb\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>\/* To reuse the connection, use this line *\/<br \/><br \/>BIO_reset(bio);<br \/><br \/>\/* To free it from memory, use this line *\/<br \/><br \/>BIO_free_all(bio);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N10267\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ubcf4\uc548 \uc5f0\uacb0 \uc124\uc815\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\uc774\uc81c \ubcf4\uc548 \uc5f0\uacb0\uc744 \uc124\uc815\ud558\ub294\ub370 \ud544\uc694\ud55c \uac83\uc744 \uc54c\uc544\ubcf4\uc790. \ub2ec\ub77c\uc9c4 \uc720\uc77c\ud55c \ubd80\ubd84\uc740 \uc5f0\uacb0 \uc124\uc815 \ubc0f \uc5f0\uacb0\uc744 \ub9cc\ub4dc\ub294 \uac83\uc774\ub2e4. \ub2e4\ub978 \ubaa8\ub4e0 \uac83\uc740 \ub611\uac19\ub2e4. <\/P>\n<P>\ubcf4\uc548 \uc5f0\uacb0\uc740 \uc5f0\uacb0\uc774 \uad6c\ucd95\ub41c \ud6c4\uc5d0 \ud578\ub4dc\uc250\uc774\ud06c(handshake)\ub97c \ud544\uc694\ub85c \ud55c\ub2e4. \ud5e8\ub4dc\uc250\uc774\ud06c \ub3d9\uc548, \uc11c\ubc84\ub294 \uc778\uc99d\uc744 \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0 \ubcf4\ub0b4\ub294\ub370, \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc5d0 \uc900\ud558\uc5ec \uc774\ub97c \ud655\uc778\ud55c\ub2e4. \ub610\ud55c, \uc778\uc99d\uc744 \uac80\uc0ac\ud558\uc5ec \ub9cc\uae30\uac00 \ub418\uc5c8\ub294\uc9c0\ub97c \ud655\uc778\ud55c\ub2e4. \uc778\uc99d\uc774 \uc2e0\ub8b0\ub97c \ubc1b\ub294 \uac83\uc778\uc9c0\ub97c \ud655\uc778\ud558\ub824\uba74 \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d \uc2a4\ud1a0\uc5b4\uac00 \uc5f0\uacb0\uc744 \uad6c\ucd95\ud558\uae30 \uc804\uc5d0 \ub85c\ub529\ub418\uc5b4\uc57c \ud55c\ub2e4. <\/P>\n<P>\ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uc11c\ubc84\uac00 \uc778\uc99d\uc744 \uc694\uccad\ud560 \uacbd\uc6b0\uc5d0\ub9cc \uc11c\ubc84\ub85c \uc778\uc99d\uc744 \ubcf4\ub0b8\ub2e4. \uc774\uac83\uc740 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc778\uc99d\uc73c\ub85c \uc54c\ub824\uc838 \uc788\ub2e4. \uc778\uc99d\uc744 \uc0ac\uc6a9\ud558\uc5ec, \uc554\ud638 \ub9e4\uac1c\ubcc0\uc218\ub4e4\uc774 \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84 \uc0ac\uc774\uc5d0 \uc804\ub2ec\ub418\uc5b4 \ubcf4\uc548 \uc5f0\uacb0\uc744 \uad6c\ucd95\ud55c\ub2e4. \ud578\ub4dc\uc250\uc774\ud06c\uac00 \uc5f0\uacb0\uc774 \uad6c\ucd95\ub41c \ud6c4\uc5d0 \uc218\ud589\ub418\ub354\ub77c\ub3c4, \ud074\ub77c\uc774\uc5b8\ud2b8\ub098 \uc11c\ubc84\ub294 \uc5b4\ub5a4 \uc9c0\uc810\uc5d0\uc11c\ub77c\ub3c4 \uc0c8\ub85c\uc6b4 \ud578\ub4dc\uc250\uc774\ud06c\ub97c \uc694\uccad\ud560 \uc218 \uc788\ub2e4. <\/P>\n<P>\ud578\ub4dc\uc250\uc774\ud06c\uc640 \ubcf4\uc548 \uc5f0\uacb0\uc744 \uc124\uc815\ud558\ub294 \ub2e4\ub978 \uce21\uba74\ub4e4\uc740 Netscape \uae30\uc220\uc790\ub8cc\uc640 RFC 2246\uc5d0 \uc124\uba85\ub418\uc5b4 \uc788\ub2e4. (<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html#Resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc<\/A>)<\/P>\n<P><a class=\"con_link\" name=\"N1027D\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\ubcf4\uc548 \uc5f0\uacb0 \uc124\uc815\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\ubcf4\uc548 \uc5f0\uacb0\uc744 \uc124\uc815\ud558\uae30 \uc704\ud574 \uc11c\ub294 \ub450 \uc904 \uc774\uc0c1\uc758 \ucf54\ub4dc\uac00 \ud544\uc694\ud558\ub2e4. \ub610 \ub2e4\ub978 \ud3ec\uc778\ud130\uac00 SSL_CTX \uc720\ud615\uc5d0 \ud544\uc694\ud558\ub2e4. \uc774\uac83\uc740 SSL \uc815\ubcf4\ub97c \ud3ec\ud568\ud558\uace0 \uc788\ub294 \uad6c\uc870\uc774\ub2e4. BIO \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \ud1b5\ud574 SSL \uc5f0\uacb0\uc744 \uad6c\ucd95\ud558\ub294\ub370\ub3c4 \uc0ac\uc6a9\ub41c\ub2e4. \uc774 \uad6c\uc870\ub294 SSL \uba54\uc18c\ub4dc \ud568\uc218, <CODE>SSLv23_client_method<\/CODE>\uc640 SSL_CTX_new\ub97c \ud638\ucd9c\ud568\uc73c\ub85c\uc368 \uc0dd\uc131\ub41c\ub2e4. <\/P>\n<P>\ub610 \ub2e4\ub978 \ud3ec\uc778\ud130 \uc720\ud615\uc758 SSL \uc5ed\uc2dc SSL \uc5f0\uacb0 \uad6c\uc870\ub97c \ubcf4\uc720\ud558\ub294\ub370 \ud544\uc694\ud558\ub2e4. SSL \ud3ec\uc778\ud130\ub294 \ub098\uc911\uc5d0 \uc0ac\uc6a9\ub418\uc5b4 \uc5f0\uacb0 \uc815\ubcf4\ub97c \uac80\uc0ac\ud558\uac70\ub098 \ucd94\uac00 SSL \ub9e4\uac1c\ubcc0\uc218\ub97c \uc124\uc815\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N1028D\" target=\"_blank\" rel=\"noopener\"><B>Listing 7. SSL \ud3ec\uc778\ud130 \uc124\uc815\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>SSL_CTX * ctx = SSL_CTX_new(SSLv23_client_method());<br \/>SSL * ssl;<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P><a class=\"con_link\" name=\"N10297\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d \uc2a4\ud1a0\uc5b4 \ub85c\ub529\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\ucf58\ud14d\uc2a4\ud2b8 \uad6c\uc870\uac00 \uc0dd\uc131\ub41c \ud6c4\uc5d0, \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d \uc2a4\ud1a0\uc5b4\uac00 \ub85c\ub529\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774\ub294 \ud53c\uc5b4(peer) \uc778\uc99d\uc758 \ud655\uc778\uc774 \uc131\uacf5\ud558\uae30 \uc704\ud574 \uc808\ub300\uc801\uc73c\ub85c \ud544\uc694\ud558\ub2e4. \uc778\uc99d\uc11c\uac00 \uc785\uc99d\uc744 \ubc1b\uc9c0 \ubabb\ud558\uba74, OpenSSL\uc740 \uadf8 \uc778\uc99d\uc11c\ub97c \ubb34\ud6a8\ud55c \uac83\uc73c\ub85c \ud50c\ub798\uadf8\ub97c \ub2e8\ub2e4. (\ud558\uc9c0\ub9cc, \uc5f0\uacb0\uc740 \uc9c0\uc18d\ub41c\ub2e4.)<\/P>\n<P>OpenSSL\uc5d0\ub294 \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c \uc138\ud2b8\uac00 \ud3ec\ud568\ub418\uc5b4 \uc788\ub2e4. \uc18c\uc2a4 \ud2b8\ub9ac\uc758 <CODE>certs<\/CODE> \ub514\ub809\ud1a0\ub9ac\uc5d0 \uc788\ub2e4. \uac01 \uc778\uc99d\uc11c\ub294 \uac1c\ubcc4 \ud30c\uc77c\uc774\uace0, \uac01\uac01\uc740 \uac1c\ubcc4\uc801\uc73c\ub85c \ub85c\ub529\ub418\uc5b4\uc57c \ud55c\ub2e4. <CODE>certs<\/CODE> \ubc11\uc5d0\ub294 \ub9cc\uae30\ub41c \uc778\uc99d\uc11c\uac00 \uc788\ub294 \ud558\uc704 \ud3f4\ub354\ub3c4 \uc788\ub2e4. \uc774\uac83\uc744 \ub85c\ub529\ud558\uba74 \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud55c\ub2e4. <\/P>\n<P>\uc6d0\ud55c\ub2e4\uba74 \uac01 \ud30c\uc77c\uc744 \uac1c\ubcc4\uc801\uc73c\ub85c \ub85c\ub529\ud560 \uc218 \uc788\uc9c0\ub9cc, \ub2e8\uc21c\ud568\uc744 \uc704\ud574 \ucd5c\uc2e0 OpenSSL \ubc30\ud3ec\ud310\uc758 \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c\ub294 \"TrustStore.pem\"\uc774\ub77c\uace0 \ud558\ub294 \ud30c\uc77c\uc758 \uc18c\uc2a4 \ucf54\ub4dc \uc555\ucd95 \ud30c\uc77c\uc5d0 \ud3ec\ud568\ub418\uc5b4 \uc788\ub2e4. \ud2b9\uc815 \ud504\ub85c\uc81d\ud2b8\uc5d0 \uc0ac\uc6a9\ub420 \ud2b8\ub7ec\uc2a4\ud2b8 \uc2a4\ud1a0\uc5b4 \ud30c\uc77c\uc774 \uc788\ub2e4\uba74, Listing 8\uc758 \"TrustStore.pem\"\uc744 \uc5ec\ub7ec\ubd84\uc758 \ud30c\uc77c\ub85c \ub300\uccb4\ud55c\ub2e4. (\ub610\ub294 \uc774 \ub450 \uac00\uc9c0 \ubaa8\ub450\ub97c \uac1c\ubcc4 \ud568\uc218 \ud638\ucd9c\ub85c \ub85c\ub529\ud55c\ub2e4.)<\/P>\n<P><CODE>SSL_CTX_load_verify_locations<\/CODE>\ub97c \ud638\ucd9c\ud558\uc5ec \ud2b8\ub7ec\uc2a4\ud2b8 \uc2a4\ud1a0\uc5b4 \ud30c\uc77c\uc744 \ub85c\ub529\ud55c\ub2e4. \uc138 \uac1c\uc758 \ub9e4\uac1c\ubcc0\uc218\uac00 \ud544\uc694\ud558\ub2e4: \ucf58\ud14d\uc2a4\ud2b8 \ud3ec\uc778\ud130, \ud2b8\ub7ec\uc2a4\ud2b8 \uc2a4\ud1a0\uc5b4 \ud30c\uc77c\uc758 \uacbd\ub85c\uc640 \ud30c\uc77c \uc774\ub984, \uc778\uc99d\uc11c \ub514\ub809\ud1a0\ub9ac\ub85c \uac00\ub294 \uacbd\ub85c. \ud2b8\ub7ec\uc2a4\ud2b8 \uc2a4\ud1a0\uc5b4 \ud30c\uc77c \uc911 \ud558\ub098 \ub610\ub294 \uc778\uc99d\uc11c \ub514\ub809\ud1a0\ub9ac\uac00 \uc9c0\uc815\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc131\uacf5 \uc2dc 1\uc774 \ub9ac\ud134\ub418\uace0, \ubb38\uc81c\uac00 \uc788\ub2e4\uba74 0\uc744 \ub9ac\ud134\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N102B5\" target=\"_blank\" rel=\"noopener\"><B>Listing 8. \ud2b8\ub7ec\uc2a4\ud2b8 \uc2a4\ud1a0\uc5b4 \ub85c\ub529\ud558\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>if(! SSL_CTX_load_verify_locations(ctx, \"\/path\/to\/TrustStore.pem\", NULL))<br \/>{<br \/>    \/* Handle failed load here *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\ud2b8\ub7ec\uc2a4\ud2b8 \uc2a4\ud1a0\uc5b4\ub97c \uc800\uc7a5 \ud560 \ub514\ub809\ud1a0\ub9ac\ub97c \uc0ac\uc6a9\ud55c\ub2e4\uba74, \uc774 \ud30c\uc77c\uc740 \ud2b9\uc815 \ubc29\uc2dd\uc73c\ub85c \uc774\ub984\uc744 \uc815\ud574\uc57c \ud55c\ub2e4. OpenSSL \ubb38\uc11c\uc5d0\uc11c\ub294 \uc774\ub97c \uc0c1\uc138\ud788 \uc124\uba85\ud558\uace0 \uc788\uc9c0\ub9cc, <CODE>c_rehash<\/CODE>\ub77c\uace0 \ud558\ub294 OpenSSL\uc5d0 \ud3ec\ud568\ub41c \ud234\uc774 \uc788\ub294\ub370, <CODE>SSL_CTX_load_verify_locations<\/CODE>\uc5d0 \ub300\ud55c \uacbd\ub85c \ub9e4\uac1c\ubcc0\uc218\ub85c\uc11c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d \ud3f4\ub354\ub97c \uc900\ube44\uc2dc\ud0a8\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N102CA\" target=\"_blank\" rel=\"noopener\"><B>Listing 9. \uc778\uc99d\uc11c \ud3f4\ub354\ub97c \uc900\ube44\ud558\uace0 \uc0ac\uc6a9\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>\/* Use this at the command line *\/<br \/><br \/>c_rehash \/path\/to\/certfolder<br \/><br \/>\/* Then call this from within the application *\/<br \/><br \/>if(! SSL_CTX_load_verify_locations(ctx, NULL, \"\/path\/to\/certfolder\"))<br \/>{<br \/>    \/* Handle error here *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uc5ec\ub7ec\ubd84\uc774 \ud544\uc694\ub85c \ud558\ub294 \ud655\uc778 \uc778\uc99d\uc11c\ub4e4 \ubaa8\ub450\ub97c \uc9c0\uc815\ud558\ub294\ub370 \ud544\uc694\ud55c \ud30c\uc77c\uc774\ub098 \ud3f4\ub354\uc758 \uc774\ub984\uc744 \uc815\ud560 \uc218 \uc788\ub2e4. \ub3d9\uc2dc\uc5d0 \ud558\ub098\uc758 \ud30c\uc77c\uacfc \ud3f4\ub354\ub97c \uc9c0\uc815\ud560 \uc218\ub3c4 \uc788\ub2e4. <\/P>\n<P><a class=\"con_link\" name=\"N102D7\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\uc5f0\uacb0 \uc0dd\uc131\ud558\uae30<\/SPAN><\/A><\/P>\n<P>BIO \uac1d\uccb4\ub294 <CODE>BIO_new_ssl_connect<\/CODE>\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc0dd\uc131\ub41c\ub2e4. \uc720\uc77c\ud55c \ub9e4\uac1c\ubcc0\uc218\ub85c\uc11c SSL \ucf58\ud14d\uc2a4\ud2b8\uc5d0 \ub300\ud55c \ud3ec\uc778\ud130\ub97c \ucde8\ud55c\ub2e4. SSL \uad6c\uc870\uc5d0 \ub300\ud55c \ud3ec\uc778\ud130\ub294 \uac80\uc0c9\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774 \uae00\uc5d0\uc11c, \uc774 \ud3ec\uc778\ud130\ub294 <CODE>SSL_set_mode<\/CODE> \ud568\uc218\ub85c\ub9cc \uc0ac\uc6a9\ub41c\ub2e4. \uc774 \ud568\uc218\ub294 SSL_MODE_AUTO_RETRY \ud50c\ub798\uadf8\ub97c \uc124\uc815\ud558\ub294\ub370 \uc0ac\uc6a9\ub41c\ub2e4. \uc774 \uc635\uc158\uc744 \uc124\uc815\ud55c \uc0c1\ud0dc\uc5d0\uc11c, \uc11c\ubc84\uac00 \uac11\uc790\uae30 \uc0c8\ub85c\uc6b4 \ud578\ub4dc\uc250\uc774\ud06c\ub97c \uc6d0\ud558\uba74, OpenSSL\uc740 \uc774\ub97c \ub4a4\uc5d0\uc11c \ud578\ub4e4\ud55c\ub2e4. \uc774 \uc635\uc158\uc774 \uc5c6\uc774, \uc77d\uae30 \ub610\ub294 \uc4f0\uae30 \uc5f0\uc0b0\uc740 \uc11c\ubc84\uac00 \uc0c8\ub85c\uc6b4 \ud578\ub4dc\uc250\uc774\ud06c\ub97c \uc6d0\ud560 \uacbd\uc6b0 \uc5d0\ub7ec\ub97c \ub9ac\ud134\ud558\uba74\uc11c, \ud504\ub85c\uc138\uc2a4\uc5d0\uc11c \uc7ac\uc2dc\ub3c4 \ud50c\ub798\uadf8\ub97c \uc124\uc815\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N102E8\" target=\"_blank\" rel=\"noopener\"><B>Listing 10. BIO \uac1d\uccb4 \uc124\uc815\ud558\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>bio = BIO_new_ssl_connect(ctx);<br \/>BIO_get_ssl(bio, &amp; ssl);<br \/>SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>SSL \ucf58\ud14d\uc2a4\ud2b8 \uad6c\uc870\uac00 \uc124\uc815\ub41c \uc0c1\ud0dc\uc5d0\uc11c \uc5f0\uacb0\uc774 \uc0dd\uc131\ub420 \uc218 \uc788\ub2e4. \ud638\uc2a4\ud2b8\ub124\uc784\uc740 <CODE>BIO_set_conn_hostname<\/CODE> \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc124\uc815\ub41c\ub2e4. \ud638\uc2a4\ud2b8\ub124\uc784\uacfc \ud3ec\ud2b8\ub294 \uc704\uc640 \uac19\uc740 \ud3ec\ub9f7\uc73c\ub85c \uc9c0\uc815\ub41c\ub2e4. \uc774 \ud568\uc218\ub294 \ub610\ud55c \ud638\uc2a4\ud2b8\ub85c \uc5f0\uacb0\uc744 \uac1c\ubc29\ud55c\ub2e4. <CODE>BIO_do_connect<\/CODE>\ub85c\uc758 \ud638\ucd9c \uc5ed\uc2dc \uc218\ud589\ub418\uc5b4 \uc5f0\uacb0\uc774 \uc131\uacf5\uc801\uc73c\ub85c \uc5f4\ub838\ub294\uc9c0\ub97c \ud655\uc778\ud55c\ub2e4. \uc774\uc640 \ub611 \uac19\uc740 \ud638\ucd9c\uc774 \ud578\ub4dc\uc250\uc774\ud06c\ub97c \uc218\ud589\ud558\uc5ec \ubcf4\uc548 \ud1b5\uc2e0\uc744 \uc124\uc815\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N102FD\" target=\"_blank\" rel=\"noopener\"><B>Listing 11. \ubcf4\uc548 \uc5f0\uacb0 \uac1c\ubc29\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>\/* Attempt to connect *\/<br \/><br \/>BIO_set_conn_hostname(bio, \"hostname:port\");<br \/><br \/>\/* Verify the connection opened and perform the handshake *\/<br \/><br \/>if(BIO_do_connect(bio) &lt;= 0)<br \/>{<br \/>    \/* Handle failed connection *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uc5f0\uacb0\uc774 \uc774\ub8e8\uc5b4\uc9c0\uba74, \uc774\uac83\uc774 \uc720\ud6a8\ud55c\uc9c0 \uc5ec\ubd80\ub97c \ud655\uc778\ud558\uae30 \uc704\ud574 \uc778\uc99d\uc11c\uac00 \uac80\uc0ac\ub41c\ub2e4. \uc2e4\uc81c\ub85c\ub294 OpenSSL\uc774 \uc774\ub97c \uc218\ud589\ud55c\ub2e4. \uc778\uc99d\uc11c\uc5d0 \uce58\uba85\uc801\uc778 \ubb38\uc81c\uac00 \uc788\ub2e4\uba74(\uc774\ub97c \ud14c\uba74, \ud574\uc2dc \uac12\uc774 \ubb34\ud6a8\ud55c \uacbd\uc6b0), \uc5f0\uacb0\uc774 \uc774\ub8e8\uc5b4\uc9c0\uc9c0 \uc54a\ub294\ub2e4. \uadf8\ub7ec\ub098, \uadf8\ub807\uac8c \uc911\uc694\ud558\uc9c0 \uc54a\uc740 \ubb38\uc81c\uac00 \uc788\ub2e4\uba74(\ub9cc\uae30 \ub610\ub294 \ubb34\ud6a8) \uc5f0\uacb0\uc774 \uc5ec\uc804\ud788 \uc0ac\uc6a9\ub420 \uc218 \uc788\ub2e4. <\/P>\n<P>OpenSSL\uc5d0\uc11c \uc778\uc99d\uc11c\uac00 \uc81c\ub300\ub85c \ub418\uc5c8\ub294\uc9c0\ub97c \ud655\uc778\ud558\ub824\uba74, \uc720\uc77c\ud55c \ub9e4\uac1c\ubcc0\uc218\ub85c\uc11c SSL \ub9e4\uac1c\ubcc0\uc218\ub85c <CODE>SSL_get_verify_result<\/CODE>\ub97c \ud638\ucd9c\ud55c\ub2e4. OpenSSL\uc758 \ub0b4\ubd80\ub85c \uc804\ub2ec\ub41c \uc778\uc99d\uc11c\uac00 \ud655\uc778\ub418\uba74(\ud2b8\ub7ec\uc2a4\ud2b8 \uccb4\ud06c \ud3ec\ud568) X509_V_OK\uac00 \ub9ac\ud134\ub41c\ub2e4. \uc798\ubabb\ub418\uc5c8\ub2e4\uba74, \uba85\ub839\ud589 \ud234\uc6a9 <CODE>verify<\/CODE> \uc635\uc158 \ubc11\uc5d0 \ubb38\uc11c\ud654 \ub41c \uc5d0\ub7ec \ucf54\ub4dc\ub97c \ub9ac\ud134\ud55c\ub2e4. <\/P>\n<P>\uc2e4\ud328\ud588\ub2e4\uace0 \ud574\uc11c \uc5f0\uacb0\uc774 \uc0ac\uc6a9\ub420 \uc218 \uc5c6\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4. \uc5f0\uacb0\uc774 \uc0ac\uc6a9\ub418\ub294\uc9c0\uc758 \uc5ec\ubd80\ub294 \ud655\uc778 \uacb0\uacfc\uc640 \ubcf4\uc548 \uace0\ub824 \uc0ac\ud56d\uc5d0 \uc758\uc874\ud55c\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc2e4\ud328\ud55c \ud2b8\ub7ec\uc2a4\ud2b8 \ud655\uc778\uc740 \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc5c6\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud55c\ub2e4. \ub354 \uac15\ud654\ub41c \ubcf4\uc548\uc73c\ub85c \uc5f0\uacb0\uc740 \uc9c0\uc18d\ub41c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N10318\" target=\"_blank\" rel=\"noopener\"><B>Listing 12. \uc778\uc99d\uc11c \uc720\ud6a8\uc131 \uc5ec\ubd80 \uac80\uc0ac\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>if(SSL_get_verify_result(ssl) != X509_V_OK)<br \/>{<br \/>    \/* Handle the failed verification *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uc774\uac83\uc774 \ud544\uc694\ud55c \ubaa8\ub4e0 \uac83\uc774\ub2e4. \uc11c\ubc84\uc640\uc758 \ud1b5\uc2e0\uc740 <CODE>BIO_read<\/CODE>\uc640 <CODE>BIO_write<\/CODE>\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc774\ub8e8\uc5b4\uc9c4\ub2e4. \uc5f0\uacb0\uc744 \ub2eb\uc744 \ub54c\uc5d0\ub294 <CODE>BIO_free_all<\/CODE> \ub610\ub294 <CODE>BIO_reset<\/CODE>\uc744 \ud638\ucd9c\ud558\ub294\ub370, \uc774\ub294 BIO\uac00 \uc7ac\uc0ac\uc6a9\ub418\ub294\uc9c0 \uc5ec\ubd80\uc5d0 \ub530\ub77c \ub2e4\ub974\ub2e4. <\/P>\n<P>\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \ub05d\ub098\uae30 \uc804 \ud2b9\uc815 \uc9c0\uc810\uc5d0\uc11c, SSL \ucf58\ud14d\uc2a4\ud2b8 \uad6c\uc870\uac00 \ub9b4\ub9ac\uc2a4 \ub418\uc5b4\uc57c \ud55c\ub2e4. \uad6c\uc870\ub97c \ud574\uc81c\ud558\ub824\uba74 <CODE>SSL_CTX_free<\/CODE>\ub97c \ud638\ucd9c\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N1033C\" target=\"_blank\" rel=\"noopener\"><B>Listing 13. SSL \ucf58\ud14d\uc2a4\ud2b8 \uc81c\uac70\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>SSL_CTX_free(ctx);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N10346\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc5d0\ub7ec \ud0d0\uc9c0<\/SPAN><\/A><\/P>\n<P>OpenSSL\uc740 \uc5d0\ub7ec\ub3c4 \ub358\uc9c4\ub2e4. \uc774\uac83\uc740 \ubb34\uc5c7\uc744 \uc758\ubbf8\ud558\ub294\uac00? \uc5d0\ub7ec \ucf54\ub4dc\ub97c \uba3c\uc800 \ubc1b\uc544\uc57c \ud55c\ub2e4. <CODE>ERR_get_error<\/CODE>\uac00 \ubc14\ub85c \uadf8\uac83\uc774\ub2e4. \uadf8 \ucf54\ub4dc\ub97c \uc5d0\ub7ec \uc2a4\ud2b8\ub9c1\uc73c\ub85c \ubcc0\ud658\ud558\ub294\ub370, \uc774\ub294 <CODE>SSL_load_error_strings<\/CODE> \ub610\ub294 <CODE>ERR_load_BIO_strings<\/CODE>\uc5d0 \uc758\ud574 \uba54\ubaa8\ub9ac\ub85c \uc601\uad6c \ub85c\ub529\ub418\ub294 \uc2a4\ud2b8\ub9c1\uc5d0 \ub300\ud55c \ud3ec\uc778\ud130\uc774\ub2e4. \uc774\ub294 \uc911\ucca9 \ud638\ucd9c\uc5d0\uc11c \uc218\ud589\ub420 \uc218 \uc788\ub2e4. <\/P>\n<P>\ud45c 1\uc740 \uc5d0\ub7ec \uc2a4\ud0dd\uc5d0\uc11c \uc5d0\ub7ec\ub97c \uac00\uc838\uc624\ub294 \ubc29\ubc95\uc744 \uc815\ub9ac\ud55c \uac83\uc774\ub2e4. Listing 14\ub294 \ud14d\uc2a4\ud2b8 \uc2a4\ud2b8\ub9c1\uc5d0\uc11c \ub9c8\uc9c0\ub9c9 \uc5d0\ub7ec \uba54\uc2dc\uc9c0\ub97c \ucd9c\ub825\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc8fc\uace0 \uc788\ub2e4. <\/P>\n<P><a class=\"con_link\" name=\"table1\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\ud45c 1. \uc2a4\ud0dd\uc5d0\uc11c \uc5d0\ub7ec \uac00\uc838\uc624\uae30 <\/SPAN><\/A><\/P>\n\n<TABLE border=1 cellSpacing=0 cellPadding=3 width=\"70%\">\n<TBODY>\n<TR vAlign=top>\n<TD><CODE>ERR_reason_error_string<\/CODE> <\/TD>\n<TD>\uc815\uc801 \uc2a4\ud2b8\ub9c1\uc5d0 \ub300\ud55c \ud3ec\uc778\ud130\ub97c \ub9ac\ud134\ud55c\ub2e4. \uc774\ub294 \uc2a4\ud06c\ub9b0\uc5d0 \ub514\uc2a4\ud50c\ub808\uc774 \ub418\uace0, \ud30c\uc77c\uc5d0 \uc791\uc131\ub420 \uc218 \uc788\ub2e4. <\/TD><\/TR>\n<TR vAlign=top>\n<TD><CODE>ERR_lib_error_string<\/CODE> <\/TD>\n<TD>\uc5b4\ub5a4 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud588\ub294\uc9c0\ub97c \uc54c\ub824\uc900\ub2e4. <\/TD><\/TR>\n<TR vAlign=top>\n<TD><CODE>ERR_func_error_string<\/CODE> <\/TD>\n<TD>\uc5d0\ub7ec\ub97c \uc77c\uc73c\ucf30\ub358 OpenSSL \ud568\uc218\ub97c \ub9ac\ud134\ud55c\ub2e4. <\/TD><\/TR><\/TBODY><\/TABLE>\n<br \/><a class=\"con_link\" name=\"N10398\" target=\"_blank\" rel=\"noopener\"><B>Listing 14. \ub9c8\uc9c0\ub9c9 \uc5d0\ub7ec \ucd9c\ub825\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>printf(\"Error: %s\\n\", ERR_reason_error_string(ERR_get_error()));<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uc774 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub294 \uc0ac\uc804 \ud3ec\ub9f7\ub41c \uc5d0\ub7ec \uc2a4\ud2b8\ub9c1\ub3c4 \uc81c\uacf5\ud55c\ub2e4. <CODE>ERR_error_string<\/CODE>\uc744 \ud638\ucd9c\ud558\uba74 \ub41c\ub2e4. \uc5d0\ub7ec \ucf54\ub4dc\uc640 \ub9e4\uac1c\ubcc0\uc218\ub85c\uc11c \uc0ac\uc804 \ud560\ub2f9\ub41c \ubc84\ud37c\ub97c \ucde8\ud55c\ub2e4. \uc774 \ubc84\ud37c\ub294 256 \ubc14\uc774\ud2b8\uc5ec\uc57c \ud55c\ub2e4. \uc774 \ub9e4\uac1c\ubcc0\uc218\uac00 NULL\uc774\uba74, OpenSSL\uc740 256 \ubc14\uc774\ud2b8\uc778 \uc815\uc801 \ubc84\ud37c\uc5d0 \uc2a4\ud2b8\ub9c1\uc744 \uc791\uc131\ud558\uace0 \uadf8 \ubc84\ud37c\uc5d0 \ub300\ud55c \ud3ec\uc778\ud130\ub97c \ub9ac\ud134\ud55c\ub2e4. \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74, \uc5ec\ub7ec\ubd84\uc774 \uc81c\uacf5\ud588\ub358 \ud3ec\uc778\ud130\ub97c \ub9ac\ud134\ud55c\ub2e4. \uc815\uc801 \ubc84\ud37c \uc635\uc158\uc744 \uc120\ud0dd\ud558\uba74, \uadf8 \ubc84\ud37c\ub294 <CODE>ERR_error_string<\/CODE>\uc5d0 \ub300\ud55c \ud638\ucd9c\ub85c \uc624\ubc84\ub77c\uc774\ud2b8 \ub420 \uac83\uc774\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N103AD\" target=\"_blank\" _cssquery_UID=\"72\" rel=\"noopener\"><B>Listing 15. \uc0ac\uc804 \ud3ec\ub9f7\ub41c \uc5d0\ub7ec \uc2a4\ud2b8\ub9c1 \uac80\uc0c9\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>printf(\"%s\\n\", ERR_error_string(ERR_get_error(), NULL));<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uc804\uccb4 \uc5d0\ub7ec \ud050\ub97c \ud30c\uc77c \ub610\ub294 BIO\ub85c \ub364\ud551\ud560 \uc218 \uc788\ub2e4. <CODE>ERR_print_errors<\/CODE> \ub610\ub294 <CODE>ERR_print_errors_fp<\/CODE>\ub97c \uc0ac\uc6a9\ud55c\ub2e4. \uc774 \ud050\ub294 \uac00\ub3c5\uc131 \ud3ec\ub9f7\uc73c\ub85c \ub364\ud551\ub41c\ub2e4. \uccab \ubc88\uc9f8 \uac83\uc740 \ud050\ub97c <CODE>BIO<\/CODE>\ub85c \ubcf4\ub0b4\uace0, \ub450 \ubc88\uc9f8 \uac83\uc740 \ud050\ub97c <CODE>FILE<\/CODE>\ub85c \ubcf4\ub0b8\ub2e4. \uc774 \uc2a4\ud2b8\ub9c1\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \ubc29\uc2dd\uc73c\ub85c \ud3ec\ub9f7\ub41c\ub2e4. (OpenSSL \ubb38\uc11c \ubc1c\ucdcc)<\/P>\n<P><CODE>[pid]:error:[error code]:[library name]:[function name]:[reason string]:[file name]:[line]:[optional text message]<\/CODE> <\/P>\n<P>\uc5ec\uae30\uc5d0\uc11c <CODE>[pid]<\/CODE>\ub294 \ud504\ub85c\uc138\uc2a4 ID, <CODE>[error code]<\/CODE>\ub294 8 \uc790\ub9ac\uc218\ub85c \ub41c 16\uc9c4\uc218 \ucf54\ub4dc, <CODE>[file name]<\/CODE>\uc740 OpenSSL \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \uc788\ub294 \uc18c\uc2a4 \ucf54\ub4dc \ud30c\uc77c,<CODE>[line]<\/CODE>\uc740 \uc18c\uc2a4 \ud30c\uc77c\uc758 \ub77c\uc778 \ub118\ubc84\uc774\ub2e4.<\/P><br \/><a class=\"con_link\" name=\"N103E4\" target=\"_blank\" rel=\"noopener\"><B>Listing 16. \uc5d0\ub7ec \ud050 \ub364\ud551\ud558\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>ERR_print_errors_fp(FILE *);<br \/>ERR_print_errors(BIO *);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N103EE\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc2dc\uc791\ud558\uae30<\/SPAN><\/A><\/P>\n<P>OpenSSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \uae30\ubcf8 \uc5f0\uacb0\uc744 \uc0dd\uc131\ud558\ub294 \uac83\uc740 \uc5b4\ub835\uc9c0 \uc54a\uc9c0\ub9cc, \uc774\uac83\uc774 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uc9c0\ub97c \ud30c\uc545\ud558\uae30 \uc704\ud574 \ubb38\uc11c\ub97c \ucc38\uc870\ud558\ub294 \uac83\uc774 \uae4c\ub2e4\ub86d\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \uae30\ucd08\uc801\uc778 \ubd80\ubd84\uc744 \uc124\uba85\ud588\uc9c0\ub9cc, OpenSSL\uc758 \ub2e4\uc591\ud55c \uce21\uba74 \ubaa8\ub450\ub97c \uc124\uba85\ud558\uc9c0 \ubabb\ud588\ub2e4. \ud504\ub85c\uc81d\ud2b8\uc5d0\uc11c SSL \uae30\ub2a5\uc744 \uc801\uc808\ud558\uac8c \uc218\ud589\ud558\ub294\ub370 \ud544\uc694\ud55c \uace0\uae09 \uc124\uc815 \ubd80\ubd84\ub3c4 \uc124\uba85\ud558\uc9c0 \ubabb\ud588\ub2e4. <\/P>\n<P>\uc774 \uae00\uc5d0\ub294 \ub450 \uac1c\uc758 \uc0d8\ud50c\uc774 \ud3ec\ud568\ub418\uc5b4 \uc788\ub2e4. \ud558\ub098\ub294 http:\/\/www.verisign.com\/\uc5d0 \ub300\ud55c \ube44\ubcf4\uc548 \uc5f0\uacb0\uc774\uace0, \ub2e4\ub978 \ud558\ub098\ub294 https:\/\/www.verisign.com\/\uc5d0 \ub300\ud55c \ubcf4\uc548 SSL \uc5f0\uacb0\uc774\ub2e4. \ub450 \uac1c \ubaa8\ub450 \uc11c\ubc84\ub85c \uc5f0\uacb0\ub41c\ub2e4. \ubcf4\uc548 \ud655\uc778\uc774 \uc5c6\uace0, \ub77c\uc774\ube0c\ub7ec\ub9ac \ub0b4 \ubaa8\ub4e0 \uc124\uc815\ub4e4\uc740 \uae30\ubcf8 \uc0ac\ud56d\uc774\ub2e4. \uad50\uc721 \uc6a9\ub3c4\ub85c \uc4f0\uae30\uc5d0 \uc801\ud569\ud558\ub2e4. <\/P>\n<P>\uc774 \uc18c\uc2a4 \ucf54\ub4dc\ub294 \uc9c0\uc6d0 \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 \ucef4\ud30c\uc77c \ub418\uc9c0\ub9cc, \ucd5c\uc2e0 \ubc84\uc804\uc758 OpenSSL\uc744 \uc0ac\uc6a9\ud574\uc57c \ud55c\ub2e4. \uc774 \uae00\uc744 \uc4f0\uace0 \uc788\ub294 \ud604\uc7ac, \ucd5c\uc2e0 \ubc84\uc804\uc740 0.9.7d\uc774\ub2e4. <br \/><\/P>\n<P><br \/><\/P>\n<BLOCKQUOTE>Secure Sockets Layer (SSL) \uc138\uc158 \uc911\uc5d0 \ud578\ub4dc\uc250\uc774\ud06c(handshake)\ub97c \ubcf4\uc548\ud654 \ud558\ub294 \uac83\uc740 \uc911\uc694\ud569\ub2c8\ub2e4. \uc774 \uc5f0\uacb0\uc5d0 \uac1c\uc785\ub41c \ubaa8\ub4e0 \ubcf4\uc548\ub4e4\uc774 \ud578\ub4dc\uc250\uc774\ud06c \ub0b4\ubd80\uc5d0\uc11c \uc124\uc815\ub418\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \ubbff\uc744 \uc218 \uc788\ub294 \uc18c\uc2a4\uc778 \uac83\ucc98\ub7fc \uac00\uc7a5\ud558\uc5ec \uce68\uc785\ud558\ub294 man in the middle (MITM) \uacf5\uaca9\uc5d0\uc11c SSL \ud578\ub4dc\uc250\uc774\ud06c\ub97c \ubcf4\uc548\ud654 \ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6cc\ubd05\uc2dc\ub2e4. \ub514\uc9c0\ud138 \uc778\uc99d\uc11c \uac1c\ub150\uacfc OpenSSL API\uac00 \uc774\ub4e4\uc744 \ub2e4\ub8e8\ub294 \ubc29\ubc95\ub3c4 \uc124\uba85\ud569\ub2c8\ub2e4.<\/BLOCKQUOTE><!--START RESERVED FOR FUTURE USE INCLUDE FILES--><!-- include java script once we verify teams wants to use this and it will work on dbcs and cyrillic characters --><!--END RESERVED FOR FUTURE USE INCLUDE FILES-->\n<P>\uc5bc\ub9c8 \uc804\uae4c\uc9c0\ub9cc \ud574\ub3c4, \uc548\uc804\ud55c \ud578\ub4dc\uc250\uc774\ud06c\ub294 \ub450 \ub2f9\uc0ac\uc790\ub4e4\uac04 \ube44\uc988\ub2c8\uc2a4\uac00 \uac74\uc804\ud55c \ud1a0\ub300\uc5d0\uc11c \uc9c4\ud589\ub418\uace0 \uc788\ub2e4\ub294 \ud45c\uc2dc\uc5c8\ub2e4. \uacb0\uad6d, \ud578\ub4dc\uc250\uc774\ud06c\ub294 \uc7a0\uc7ac\uc801\uc778 \ud30c\ud2b8\ub108\ub97c \ud3c9\uac00\ud558\ub294 \uae30\ud68c\uc600\ub2e4. \uc548\uc804\ud558\uace0 \ubbff\uc744 \uc218 \uc788\ub294 \ud578\ub4dc\uc250\uc774\ud06c\ub294 \ub450 \ud2b8\ub79c\uc7ad\uc158 \ub2f9\uc0ac\uc790\ub4e4\uc774 \uc11c\ub85c\uc5d0\uac8c \uc720\uc775\uc774 \ub418\ub294 \ubb34\uc5c7\uc778\uac00\ub97c \uc218\ud589\ud558\uace0 \uc788\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud588\ub2e4. \uc548\uc804\ud558\uc9c0 \uc54a\uc740 \ud578\ub4dc\uc250\uc774\ud06c\ub294 \ud55c \ucabd\ub9cc \uc774 \ud2b8\ub79c\uc7ad\uc158\uc744 \uc774\ud574\ud558\uace0 \uc788\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud588\ub2e4. <\/P>\n<P>\ud578\ub4dc\uc250\uc774\ud06c\ub294 \uc628\ub77c\uc778 \ud2b8\ub79c\uc7ad\uc158\uc5d0\uc11c\ub3c4 \ub611\uac19\uc774 \uc801\uc6a9\ub41c\ub2e4.<\/P>\n<P>developerWorks\uc758 \uc774\uc804 \uae30\uc220\uc790\ub8cc\uc778, \"<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\" cmimpressionsent=\"1\">OpenSSL API\ub97c \uc774\uc6a9\ud55c \ubcf4\uc548 \ud504\ub85c\uadf8\ub798\ubc0d, Part 1: API\uc758 \uac1c\uc694<\/A>\uc5d0\uc11c\ub294 OpenSSL\uc744 \uc0ac\uc6a9\ud55c \uae30\ubcf8\uc801\uc774\uace0 \ub2e8\uc21c\ud55c \ubcf4\uc548 \uc5f0\uacb0\uc744 \uc0dd\uc131\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud588\ub2e4. \ud558\uc9c0\ub9cc, \uae30\ubcf8 \uc124\uc815\uc5d0 \ud3ec\ud568\ub41c \uae30\ucd08\uc801\uc778 \ubd80\ubd84\ub9cc \uc124\uba85\ud588\ub2e4. \ucee4\uc2a4\ud130\ub9c8\uc774\uc9d5 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c\ub294 \uc124\uba85\ud558\uc9c0 \ubabb\ud588\ub2e4. \uc774\uc804 \uae00\uc5d0\uc11c\ub294 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc758 \uac1c\ub150\uc744 \uc124\uba85\ud588\uace0, OpenSSL\uc758 \uc778\uc99d\uc11c \ud655\uc778\uc774 \uc131\uacf5 \ub610\ub294 \uc2e4\ud328\ud588\ub294\uc9c0\ub97c \ud655\uc778\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud588\ub2e4.<\/P>\n<P>\uc774 \uae00\uc5d0\uc11c\ub294 OpenSSL\uc5d0 \ub300\ud574 \uc880\ub354 \uc790\uc138\ud788 \uc0b4\ud3b4\ubcfc \uc608\uc815\uc774\ub2e4. <I>man in the middle<\/I> (MITM) \uacf5\uaca9\uc5d0 \ub300\ube44\ud558\ub3c4\ub85d \ud578\ub4dc\uc250\uc774\ud06c\ub97c \ubcf4\uc548\ud654 \ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud560 \uac83\uc774\ub2e4. <\/P>\n<P><a class=\"con_link\" name=\"N10141\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ub514\uc9c0\ud138 \uc778\uc99d\uc11c<\/SPAN><\/A><\/P>\n<P>\uc774 \uae00 \ud6c4\ubc18\uc5d0, \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \uac80\uc0c9\ud558\uace0 \ud655\uc778\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud560 \uac83\uc774\ubbc0\ub85c, \uc5ec\uae30\uc5d0\uc11c\ub294 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uac00 \ubb34\uc5c7\uc774\uace0 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uc9c0\uc5d0 \ub300\ud574\uc11c \uac04\ub7b5\ud788 \uc124\uba85\ud558\uaca0\ub2e4. \uc5ec\ub7ec\ubd84\uc774 \ub370\uc774\ud130 \uc554\ud638\ud654\uc640 SSL\uc5d0 \ub300\ud574 \uc775\uc219\ud558\ub2e4\uba74, \uc774 \uc139\uc158\uc744 \uc77d\uc9c0 \uc54a\uc544\ub3c4 \uc88b\ub2e4. \uc554\ud638\uc640 SSL \uc2e4\ud589\uc5d0 \ub300\ud574 \ubc30\uc6b0\uace0 \uc2f6\ub2e4\uba74 <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl2.html#resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc<\/A> \uc139\uc158\uc5d0 \uc18c\uac1c\ub41c \uae30\uc220\uc790\ub8cc\uc640 \ud29c\ud1a0\ub9ac\uc5bc\uc744 \ucc38\uc870\ud558\ub77c.<\/P>\n<P>\uac04\ub2e8\ud788 \ub9d0\ud574\uc11c, \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub294 \ube44\ub300\uce6d\uc801\uc73c\ub85c \uc554\ud638\ud654 \ub41c \ud0a4(<I>asymmetric cryptography key<\/I>)\uc774\ub2e4. \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc640 \uad00\ub828\ud55c \ud604\uc7ac\uc758 \ud45c\uc900\uc740 \uc774 \ud0a4\uc640 \ud568\uaed8 \uc815\ubcf4\ub97c \ud3ec\ud568\uc2dc\ucf30\ub2e4. \uc804\ud615\uc801\uc778 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc5d0\ub294 \uc18c\uc720\uc790\uc758 \uc774\ub984(\uc778\uc99d\uc11c\uac00 \uc6f9 \uc11c\ubc84\uc5d0\uc11c \uc0ac\uc6a9\ub420 \uacbd\uc6b0 \uc804\uccb4 \ub3c4\uba54\uc778 \uc774\ub984)\uacfc \uc5f0\ub77d\ucc98 \uc815\ubcf4\uac00 \ud3ec\ud568\ub41c\ub2e4. \uc720\ud6a8 \ub370\uc774\ud130 \ubc94\uc704\uc640 \ubcf4\uc548 \uc11c\uba85\uc774 \uc788\uc5b4\uc11c \uadf8 \uc778\uc99d\uc11c\uac00 \uc624\uc5fc\ub418\uc5c8\ub294\uc9c0 \uc5ec\ubd80\ub97c \ud655\uc778\ud560 \uc218 \uc788\ub2e4.<\/P>\n<P>\ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub294 \uba85\ub839\uc5b4 OpenSSL \ud234 \ub610\ub294 \uc774\uc640 \uac19\uc740 \ubaa9\uc801\uc5d0 \ub9de\uac8c \ub9cc\ub4e4\uc5b4\uc9c4 \uae30\ud0c0 \ud234\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc27d\uac8c \uc0dd\uc131\ub420 \uc218 \uc788\ub2e4. \ub204\uad70\uac00\uc5d0 \uc758\ud574 \uc0dd\uc131\ub41c \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub294 \uc2e0\ub8b0\ub3c4\uc5d0 \ubb38\uc81c\uac00 \uc0dd\uae38 \uac83\uc774\ub2e4. \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub294 \ub2e8\uc21c\ud55c \uc554\ud638 \ud0a4 \uc774\uc0c1\uc774\ub2e4. \uc774\uac83\uc740 \uc628\ub77c\uc778 \uc99d\uba85\uc11c\uc774\ub2e4. \uc778\uc99d\uc11c\ub294 \uc5ec\ub7ec\ubd84\uacfc \ud1b5\uc2e0\uc744 \uc2dc\ub3c4\ud558\ub294 \ub204\uad6c\ub4e0 \ud655\uc778\ud55c\ub2e4. \uc2e0\ub8b0\ub97c \ubcf4\uc5ec\uc8fc\ub824\uba74 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub294 Certificate Authority (CA)\uc5d0 \uc758\ud574 \uc11c\uba85\uc774 \ub418\uc5b4\uc57c \ud55c\ub2e4. <\/P>\n<P>\uc778\uc99d\uc11c \uae30\uad6c\ub294 \ub514\uc9c0\ud138 \ubcf4\uc548 \uc138\uacc4\uc5d0\uc11c \uc2e0\uc784\uc744 \ubc1b\ub294 \uc11c\ub4dc \ud30c\ud2f0\ub85c\uc11c \uc791\ub3d9\ud55c\ub2e4. \uc628\ub77c\uc778\uc5d0\uc11c \uc815\uccb4\ub97c \ud655\uc778\ud558\ub294 \uac83\uc740 \uc5b4\ub835\uae30 \ub54c\ubb38\uc5d0, \uc778\uc99d\uc11c \uae30\uad6c\uac00 \uadf8 \uc77c\uc744 \ub5a0\ub9e1\ub294\ub2e4. \uc778\uc99d\uc11c\ub97c \uad6c\ub9e4\ud558\uac70\ub098 \uc778\uc99d\uc11c \uc11c\uba85\uc5d0 \uc9c0\ubd88\uc744 \ud558\ub294 \uc0ac\ub78c\uc758 \uc2e0\uc6d0\uc744 \ud655\uc778\ud55c\ub2e4. \uc778\uc99d\uc11c\ub97c \uc2e0\uc784\ud558\ub824\uba74, \uc0ac\uc6a9\uc790\ub294 \uc778\uc99d\uc11c \uae30\uad6c\ub97c \uc2e0\uc784\ud574\uc57c \ud55c\ub2e4. \uc0ac\uc6a9\uc790\ub294 CA\uc758 \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c\ub97c \ucc98\ub9ac \ubc0f \uc0ac\uc6a9\ud568\uc73c\ub85c\uc368 \uc778\uc99d\uc11c \uae30\uad6c\uc758 \uc2e0\ub8b0\uc131\uc5d0 \uc11c\uba85\ud55c\ub2e4. Verisign\uacfc Thawte\uac00 \uc798 \uc54c\ub824\uc9c4 \uc778\uc99d\uc11c \uae30\uad6c\uc774\ub2e4. <\/P>\n<P>\uc778\uc99d\uc11c\uc758 \ubcf4\uc548\uc774 \ub178\ucd9c\ub418\uba74, \ucde8\uc18c\ub41c\ub2e4. \ub2e4\uc2dc \ub9d0\ud574\uc11c \ubb34\ud6a8\ud55c \uac83\uc73c\ub85c \uc120\uc5b8\ub41c\ub2e4. \uc778\uc99d\uc11c\uac00 \ubb34\ud6a8\ud55c \uac83\uc73c\ub85c \uc120\uc5b8\ub418\uba74, CA\ub294 \uadf8 \uc778\uc99d\uc11c \uce74\ud53c\ub97c \uc18c\uc720\ud558\uace0 \uc788\ub294 \ubaa8\ub4e0 \uc0ac\ub78c\ub4e4\uc5d0\uac8c \uacf5\uc9c0\ub97c \ubcf4\ub0b4\uc57c \ud55c\ub2e4. \ub300\uc2e0, CA\ub294 <I>Certificate Revocation List<\/I> (CRL)\ub97c \ubc1c\ud589\ud55c\ub2e4. \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \uc0ac\uc6a9\ud558\ub294 \ube0c\ub77c\uc6b0\uc800\uc640 \uae30\ud0c0 \ubcf4\uc548 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\ub4e4\uc740 \uadf8 \uc778\uc99d\uc11c\uac00 \uc18c\uc720\uc790 \ub610\ub294 CA\uc5d0 \uc758\ud574 \ucde8\uc18c\ub418\uc5c8\ub294\uc9c0\ub97c \ud655\uc778\ud560 \uc218 \uc788\ub2e4.<\/P>\n<P>\uc778\uc99d\uc11c \ucca0\ud68c\ub294 OCSP \ud504\ub85c\ud1a0\ucf5c\uc744 \uc0ac\uc6a9\ud558\uc5ec \uac80\uc0ac\ub420 \uc218 \uc788\ub2e4. OCSP\ub294 <I>Online Certificate Status Protocol<\/I>\uc744 \ub73b\ud558\ub294 \ub9d0\ub85c\uc11c, RFC 2560\uc5d0\uc11c \uc815\uc758\ub41c\ub2e4. OpenSSL\uc740 OCSP\uc640 CRL \uae30\ub2a5 \ubaa8\ub450\ub97c \uac16\uace0 \uc788\uc9c0\ub9cc, \uadf8 \uae30\ub2a5\uae4c\uc9c0\ub294 \uc774 \uae00\uc5d0\uc11c\ub294 \uc124\uba85\ud558\uc9c0 \uc54a\uaca0\ub2e4. \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc5d0 \ub300\ud55c \ud604\uc7ac \ud45c\uc900\uc740 X.509\uc774\ub2e4. (RFC 3280\uc5d0\uc11c \uc815\uc758\ub428) <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N10167\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ube44\uc988\ub2c8\uc2a4\ub97c \uc2dc\uc791\ud558\ub294 \ud578\ub4dc\uc250\uc774\ud06c<\/SPAN><\/A><\/P>\n<P>\uc774 \uae00\uc740 \ud578\ub4dc\uc250\uc774\ud06c \ud558\ub294 \uc0ac\uc774\uc5d0 \uc11c\ubc84\uc758 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \ucc98\ub9ac\ud558\ub294 \uac83\uc5d0 \ucd08\uc810\uc744 \ub9de\ucd94\ubbc0\ub85c \ud578\ub4dc\uc250\uc774\ud06c\uac00 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uc9c0\ub97c \uc0c1\uc138\ud788 \uc0b4\ud3b4\ubcf4\uace0\uc790 \ud55c\ub2e4. \uc5ec\ub7ec\ubd84\uc774 SSL \ud504\ub85c\uc2dc\uc800\uc5d0 \uc775\uc219\ud558\ub2e4\uba74, \uc774 \uc139\uc158\uc740 \ubb34\uc2dc\ud574\ub3c4 \uc88b\ub2e4. <\/P>\n<P>\uc5f0\uacb0\uc5d0\uc11c \uac1c\ubc29(opening) \ud578\ub4dc\uc250\uc774\ud06c\ub294 \uc11c\ubc84\uc5d0 \"Hello\"\ub77c\uace0 \ub9d0\ud558\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\ub85c \uc2dc\uc791\ub41c\ub2e4. Hello \uba54\uc2dc\uc9c0\uc5d0\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\uc758 \ubcf4\uc548 \ub9e4\uac1c\ubcc0\uc218\ub4e4\uc774 \ud3ec\ud568\ub418\uc5b4 \uc788\ub2e4.<\/P>\n<UL>\n<LI>SSL \ubc84\uc804 \ub118\ubc84 \n<LI>\ubb34\uc791\uc704\ub85c \uc0dd\uc131\ub41c \ub370\uc774\ud130 \n<LI>\uc554\ud638 \uc124\uc815 \n<LI>\ud1b5\uc2e0\uc5d0 \ud544\uc694\ud55c \uae30\ud0c0 \uc0ac\ud56d <\/LI><\/UL>\n<P>\uc11c\ubc84\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \uc81c\uacf5\ud55c \uac83\uacfc \uac19\uc740 \uc720\ud615\uc758 \uc815\ubcf4\uc778 \uc11c\ubc84\uc758 \ubcf4\uc548 \ub9e4\uac1c\ubcc0\uc218\ub4e4\uc744 \ud3ec\ud568\ud558\uace0 \uc788\ub294 \uace0\uc720\uc758 Hello \uba54\uc2dc\uc9c0\uc5d0 \uc751\ub2f5\ud55c\ub2e4. \ubc14\ub85c \uc774\ub54c \uc11c\ubc84\ub3c4 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \ubcf4\ub0b8\ub2e4. \ud074\ub77c\uc774\uc5b8\ud2b8 \uad8c\ud55c\uc774 \uc5f0\uacb0\uc5d0 \uc0ac\uc6a9\ub418\uba74 \uc11c\ubc84\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\uc758 \uc778\uc99d\uc11c\uc5d0 \ub300\ud55c \uc694\uccad\uc744 \ubcf4\ub0b8\ub2e4. <\/P>\n<P>\uc11c\ubc84\uc758 Hello \uba54\uc2dc\uc9c0\ub97c \ubc1b\uc73c\uba74, \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uac00 \ud655\uc778\ub41c\ub2e4. \uc778\uc99d\uc11c\uc758 \ub2e4\uc591\ud55c \ub9e4\uac1c\ubcc0\uc218\ub4e4\uc744 \ud655\uc778\ud558\uc5ec \uc778\uc99d\uc11c\uac00 \uc6d0\ub798 \uadf8\ub300\ub85c \ubcf4\uc874\ub418\uc5c8\ub294\uc9c0\ub97c \ud655\uc778\ud558\uace0, \uc720\ud6a8 \uae30\uac04 \ub0b4\uc5d0 \uc778\uc99d\uc11c\uac00 \uc0ac\uc6a9\ub418\uace0 \uc788\ub294\uc9c0\ub97c \ud655\uc778\ud55c\ub2e4. <\/P>\n<P>\uc5ec\uae30\uc5d0\uc11c \uc218\ud589\ub418\uc5b4\uc57c \ud558\ub294 \ud55c \uac00\uc9c0 \ub2e8\uacc4\ub294 \uc5f0\uacb0\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ud638\uc2a4\ud2b8 \ub124\uc784\uacfc \ube44\uad50\ud558\uc5ec \uc778\uc99d\uc11c \uc0c1\uc758 \uc774\ub984\uc744 \uac80\uc0ac\ud558\ub294 \uac83\uc774\ub2e4. \uc774\ub294 SSL \ud45c\uc900\uc758 \uc77c\ubd80\ub294 \uc544\ub2c8\uc9c0\ub9cc, man in the middle attack (MITM)\uc744 \ubc29\uc9c0\ud558\uae30 \uc704\ud574\uc11c \uad8c\uc7a5\ub41c\ub2e4. \uc774 \ub2e8\uacc4\ub294 \uc778\uc99d\uc11c\uac00 \uc5ec\ub7ec\ubd84\uc774 \uc0dd\uac01\ud558\uace0 \uc788\ub294 \uc5d4\ud130\ud2f0\uc5d0\uc11c \uc628 \uac83\uc784\uc744 \ud655\uc778\ud55c\ub2e4. \uc774 \ub450 \uac1c\uac00 \uc774 \uc9c0\uc810\uc5d0\uc11c \ub9e4\uce58\ub418\uc9c0 \uc54a\uc73c\uba74, \uc778\uc99d\uc11c\ub294 \ubb34\ud6a8\ud55c \uac83\uc774 \uc544\ub2cc, \uc758\uc2ec\uc758 \ub300\uc0c1\uc774 \ub41c\ub2e4. <\/P>\n<P>\ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84 \uac04 \uacf5\uc720\ub418\uc5c8\ub358 \ub79c\ub364 \ub370\uc774\ud130\ub294 \uc11c\ubc84\uc640 \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0\uac8c\ub9cc \uc54c\ub824\uc9c4 \uacf5\uc720 \ube44\ubc00 \uac12\uc73c\ub85c\uc11c \uc774 \uc138\uc158\uc5d0\ub9cc \uc0ac\uc6a9\ub418\ub294 <I>premaster secret<\/I>\uc744 \uc0dd\uc131\ud558\ub294\ub370 \uc0ac\uc6a9\ub41c\ub2e4. \uc774 \ube44\ubc00 \uac12\uc740 \uc11c\ubc84\uc758 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub85c \uc554\ud638\ud654 \ub418\uace0 \ud655\uc778\uc744 \uc704\ud574 \uc11c\ubc84\ub85c \ubcf4\ub0b4\uc9c4\ub2e4. <\/P>\n<P>\uc11c\ubc84\uac00 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc778\uc99d\uc744 \uc694\uccad\ud558\uba74, \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \ud578\ub4dc\uc250\uc774\ud06c \ub3d9\uc548 \ubb34\uc791\uc704\ub85c \uc0dd\uc131\ub418\uace0 \uc11c\ubc84\uc640 \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0\uac8c\ub9cc \uc54c\ub824\uc9c4 \ub370\uc774\ud130\uc758 \ub2e8\ubc29\ud5a5 \ud574\uc2dc(hash)\ub97c \uc0dd\uc131\ud55c\ub2e4. \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\uc758 \uac1c\uc778 \ud0a4(private key)\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud574\uc2dc\uc5d0 \uc11c\uba85\uc744 \ud558\uace0 \uc11c\uba85\ub41c \ub370\uc774\ud130\uc640 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \uc11c\ubc84\ub85c \ubcf4\ub0b8\ub2e4. \uc11c\ubc84\ub294 \uadf8 \uc815\ubcf4\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud074\ub77c\uc774\uc5b8\ud2b8\ub97c \uc778\uc99d\ud55c\ub2e4. <\/P>\n<P>\uc778\uc99d\uc774 \uc131\uacf5\ud558\uba74, \uc11c\ubc84\uc640 \ud074\ub77c\uc774\uc5b8\ud2b8 \ubaa8\ub450 \uacf5\uc720\ub41c \ub79c\ub364 \ub370\uc774\ud130\ub97c \uc54c\uace0\ub9ac\uc998\uc744 \ud1b5\ud574 \uc2e4\ud589\ud558\uc5ec <I>master secret<\/I>\uc744 \uc0dd\uc131\ud55c\ub2e4. master secret\uc5d0\uc11c, \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84\ub294 \uc138\uc158 \ud0a4(<I>session keys<\/I>)\ub97c \uc0dd\uc131\ud55c\ub2e4. \uc774\uac83\uc740 \uc120\ud0dd\ub41c \uc2dc\uba54\ud2b8\ub9ad \uc554\ud638 \uc548\uc5d0 \uc788\ub294 \ub300\uce6d \ud0a4\ub85c\uc11c \uc138\uc158 \ub370\uc774\ud130\ub97c \uc554\ud638\ud654 \ud558\ub294\ub370 \uc0ac\uc6a9\ub41c\ub2e4. <\/P>\n<P>\ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uc885\ub8cc\ub418\uc5c8\ub2e4\ub294 \uba54\uc2dc\uc9c0\ub97c \uc11c\ubc84\ub85c \ubcf4\ub0c4\uc73c\ub85c\uc368 \ud578\ub4dc\uc250\uc774\ud06c\ub97c \uc885\ub8cc\ud55c\ub2e4. \uc774\uac83\uc740 \uc11c\ubc84\uc5d0 \uc758\ud574 \ud655\uc778\ub418\uc5b4\uc57c \ud558\ub294 \uc554\ud638\ud654 \ub41c \ub2e8\ubc29\ud5a5 \ud574\uc2dc \uac12 \uc138\ud2b8\uc774\ub2e4. \uc11c\ubc84\ub294 \ube44\uc2b7\ud55c \uba54\uc2dc\uc9c0\ub97c \ud074\ub77c\uc774\uc5b8\ud2b8\ub85c \ubcf4\ub0b8\ub2e4. \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84\ub294 \ud578\ub4dc\uc250\uc774\ud06c\ub97c \uc885\ub8cc\ud558\uace0 \ud1b5\uc2e0\uc744 \uc2dc\uc791\ud558\uae30 \uc804\uc5d0 \ub370\uc774\ud130\uac00 \uc815\ud655\ud55c\uc9c0\ub97c \ud655\uc778\ud55c\ub2e4.<\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N101A1\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>Man in the middle<\/SPAN><\/A><\/P>\n<P>\uc774\uac83\uc740 \uc544\uc774\ub4e4\uc774 \ud558\ub294 \uac8c\uc784\uc774\uc9c0\ub9cc, public key infrastructures (PKI)\uc5d0\uc11c\ub3c4 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc2ec\uac01\ud55c \uacf5\uaca9\uc774\ub2e4. \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc5d0 \ub300\ud574 \uc774\uc57c\uae30 \ud560 \ub54c, SSL \uc5f0\uacb0 \ub4a4\uc758 \ubcf4\uc548 \ub9e4\uac1c\ubcc0\uc218\uc640 \uad00\uacc4 \uc5c6\uc774 man in the middle \uacf5\uaca9\uc740 \uc774\ub7ec\ud55c \uc0ac\uc804 \uc8fc\uc758 \uc0ac\ud56d\ub4e4\uc744 \uc2e4\ud589\ud558\uae30 \ub54c\ubb38\uc5d0 \ubc18\ub4dc\uc2dc \uace0\ub824\ud574\uc57c \ud55c\ub2e4. <\/P>\n<P>Casey\uc640 Samantha\uac00 SSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud1b5\uc2e0\ud55c\ub2e4\uace0 \uc0dd\uac01\ud574 \ubcf4\uc790. \uc0bc\uc790\uc778 Isabel\uc740 \uc5f0\uacb0 \uc2dc\ub3c4\ub97c \uac00\ub85c\ucc44\uc11c \uc774\ub4e4 \uac04 \ud504\ub85d\uc2dc\ub85c\uc11c \uc5ed\ud560\uc744 \ud55c\ub2e4. Isabel\uc774 SSL \uc5f0\uacb0\uc774 \uc124\uc815\ub418\uc5c8\ub2e4\ub294 \uac83\uc744 \uc54c\uba74, Samantha\uc5d0\uac8c\ub294 Casey\uc778 \uac83\ucc98\ub7fc, Casey\uc5d0\uac8c\ub294 Samantha\uc778 \uac83\ucc98\ub7fc \uac00\uc7a5\ud55c\ub2e4. Isabel\uc740 \uc911\uac04\uc5d0\uc11c \uc591 \uce21\uc758 \ub300\ud654\ub97c \uac00\ub85c\ucc48\ub2e4. \ub300\ud654\uc5d0 \uacc4\uc88c \ubc88\ud638\uc640 \uac1c\uc778 \uc815\ubcf4\uac00 \ud3ec\ud568\ub418\uc5b4 \uc788\ub2e4\uba74 Isabel\uc740 \uc544\uc774\ub514 \ub3c4\uc6a9\ub3c4 \ud560 \uc218 \uc788\ub2e4. <\/P>\n<P>\uc774 \ubd80\ubd84\uc5d0\uc11c \uc778\uc99d\uc11c\uc5d0 \ub300\ud55c \ud2b8\ub7ec\uc2a4\ud2b8 \uccb4\uc778\uacfc \uacf5\ud1b5 \uc774\ub984\ub4e4\uc774 \uc774\ub97c \ubc29\uc9c0\ud560 \uc218 \uc788\ub2e4. \ud578\ub4dc\uc250\uc774\ud06c \ub3d9\uc548, \uc778\uc99d\uc11c\uac00 \uad50\ud658\ub41c\ub2e4. \uc778\uc99d\uc11c\uc758 \uc720\ud6a8\uc131\uc774 \ubd84\uc11d\ub420 \ub54c, \ud2b8\ub7ec\uc2a4\ud2b8 \uc11c\uba85\ub3c4 \uac80\uc0ac\ub41c\ub2e4. \uc11c\ubc84 \uc778\uc99d\uc11c \uc0c1\uc758 \uacf5\ud1b5 \uc774\ub984\uc774 \ub098\uba38\uc9c0 \uc778\uc99d\uc11c\uc640 \ud568\uaed8 \uac80\uc0ac\ub418\uba74 \uacf5\uaca9\uc740 \uc2e4\ud328\ud558\uc9c0 \uc54a\uaca0\ub294\uac00? \uc804\uc801\uc73c\ub85c \uadf8\ub7f0 \uac83\uc740 \uc544\ub2c8\ub2e4. <\/P>\n<P>Isabel\uc774 Samantha\uc758 \uc774\ub984\uc744 \uac00\uc9c4 \uc778\uc99d\uc11c\ub97c \uac16\uace0 \uc788\ub2e4\uace0 \uac00\uc815\ud574 \ubcf4\uc790. \uc774\uac83\uc740 \ub610\ud55c Casey\uc758 \ud2b8\ub7ec\uc2a4\ud2b8 \ubaa8\ub378 \ub0b4\uc5d0\uc11c CA\uc5d0 \uc758\ud574 \uc11c\uba85\ub3c4 \ub418\uc5c8\ub2e4. \uc5ec\uae30\uc5d0\uc11c MITM \uacf5\uaca9\uc740 \uacf5\ud1b5 \uc774\ub984\uc744 \uac80\uc0ac\ud55c\ub2e4\uace0 \ud574\uc11c \uc2e4\ud328\ub418\uc9c0 \uc54a\ub294\ub2e4. \uc774 \uc778\uc99d\uc11c\uc640 \ud2b8\ub7ec\uc2a4\ud2b8\ub294 \uc720\ud6a8\ud558\uace0, \uc774\ub984\uc774 \uccb4\ud06c\ub41c\ub2e4. \uc774\uc81c \ud070 \ubb38\uc81c\uac00 \uc0dd\uae34 \uac83\uc774\ub2e4. <\/P>\n<P>\ud558\uc9c0\ub9cc, \uc778\uc99d\uc11c \uae30\uad6c\ub97c \ubcf4\uba74 \uc774\uac83\uc740 \ubcc4\uac1c\uc758 \ubb38\uc81c\uc774\ub2e4. \ub300\ubd80\ubd84\uc758 \uc778\uc99d\uc11c \uae30\uad6c\ub294 \uac1c\uc778\uc758 \uc774\ub984\uc744 \uac00\uc9c4 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \ubc1c\ud589\ud558\uae30 \uc804\uc5d0 \uac1c\uc778\uc758 \uc2e0\ubd84\uc744 \ud655\uc778\ud55c\ub2e4. \uc774\uac83 \ub54c\ubb38\uc5d0, Isabel\uc774 \uc798 \uc54c\ub824\uc9c4 \ub9e4\uc6b0 \uba85\uc131\uc774 \ub192\uc740 \uc778\uc99d\uc11c \uae30\uad6c\uc5d0\uc11c Samantha\uc758 \uc774\ub984\uc744 \uac00\uc9c4 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \uc5bb\uc744 \uac00\ub2a5\uc131\uc740 \ud76c\ubc15\ud558\ub2e4. <\/P>\n<P>CA\ub97c \uc0ac\uc6a9\ud558\uba74 \uc774\ub7ec\ud55c \ubcf4\uc548 \ubb38\uc81c\ub4e4\uc744 \ubcf4\ub2e4 \uc27d\uac8c \ud574\uacb0\ud560 \uc218 \uc788\ub2e4. \uc608\ub97c \ub4e4\uc5b4, CA\uc640 Isabel\uc774 \uac19\uc740 \ucef4\ud37c\ub2c8\uc5d0 \uc801\uc6a9\ud55c\ub2e4\uba74 (\ub2e4\uc2dc \ub9d0\ud574\uc11c, \"inside job\"). \uc774\ub807\uac8c \ub418\uba74, \uac70\uc758 \ubaa8\ub4e0 \uc0ac\ub78c\ub4e4\uc758 \uc774\ub984\uc744 \uac00\uc9c4 \uc784\uc758\uc758 \uc778\uc99d\uc11c\ub97c \uc0dd\uc131\ud560 \uc218 \uc788\ub294 CA\uc758 \uc791\uc5c5 \uacf5\uac04 \ub0b4\uc5d0\uc11c \uc11c\uba85 \ud0a4\uac00 \ub204\uad70\uac00\uc5d0 \uc758\ud574\uc11c \ub3c4\ub09c \ub2f9\ud560 \uc218 \uc788\ub2e4. \uc778\uc99d\uc11c\uc758 \uac1c\uc778\uc801\uc778 \ubd80\ubd84\uc740 \uc11c\uba85\uc744 \uc0dd\uc131\ud558\ub294\ub370 \uc0ac\uc6a9\ub418\ub294 \ubc18\uba74, \ud328\uc2a4\uc6cc\ub4dc\ub294 \uc18c\uc15c \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \ub610\ub294 \uae30\ud0c0 \ube44\uc2b7\ud55c \uae30\uc220\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub3c4\ub09c \ub2f9\ud560 \uc218 \uc788\ub2e4. <\/P>\n<P>MITM \uacf5\uaca9\uc740 \ud504\ub85d\uc2dc \uc11c\ubc84(<I>proxy servers<\/I>)\ub97c \ub17c\ud560 \ub54c \ud2b9\ud788 \uc911\uc694\ud558\ub2e4. \ubcf4\uc548 \uc5f0\uacb0\uc740 \ud504\ub85d\uc2dc \uc11c\ubc84\ub97c \ud1b5\ud574 \uc758\ub3c4\ud55c \ubaa9\uc801\uc9c0\ub85c \"\ud130\ub110\ub9c1\" \ub418\uc5b4\uc57c \ud558\ubbc0\ub85c, \uc545\uc758\uc801\uc778 \ud504\ub85d\uc2dc \uc11c\ubc84\ub4e4\uc740 \uc5b4\ub5a4 \ub300\ud654\ub77c\ub3c4 \uc27d\uac8c \uc5ff\ub4e4\uc744 \uc218 \uc788\ub2e4. \uc545\uc758\uc801\uc778 \ud504\ub85d\uc2dc\ub294 \uc5f0\uacb0\uc774 \uc2e4\uc81c\ub85c \uc774\ub8e8\uc5b4 \uc9c0\uc9c0 \uc54a\uc744 \ub54c\ub3c4 \uc5f0\uacb0\uc774 \ub41c \uac83\ucc98\ub7fc \ubcf4\uc774\uac8c \ud560 \uc218 \uc788\ub2e4. \uc778\ud130\ub137\uc744 \ud1b5\ud574 \"\uc775\uba85 \ud504\ub85d\uc2dc(anonymous proxy)\" \uc11c\ube44\uc2a4\ub97c \uc0ac\uc6a9\ud560 \ub54c \ud2b9\ud788 \uc8fc\uc758\ub97c \uae30\uc6b8\uc5ec\uc57c \ud55c\ub2e4. \uadf8\ub4e4\uc758 \uc2dc\uc2a4\ud15c\uc744 \ud1b5\ud574 \uc0ac\uc6a9\uc790 \uc774\ub984\uacfc \ud328\uc2a4\uc6cc\ub4dc\ub97c \ubcf4\ub0b8\ub2e4\uace0 \ud574\uc11c \ucda9\ubd84\ud788 \uc2e0\ub8b0\ud560 \uc218 \uc788\uaca0\ub294\uac00? <\/P>\n<P>\uc774\ub7ec\ud55c \uacf5\uaca9\uc740 \ucef4\ud4e8\ud130 \ubc0f \ub514\uc9c0\ud138 \ubcf4\uc548\uc758 \uc138\uacc4\uc5d0\uc11c\ub9cc \ubc1c\uc0dd\ud558\ub294 \uac83\uc774 \uc544\ub2c8\ub2e4. \ud55c \uc5ec\uc131\uc774 MITM \uacf5\uaca9\uacfc \ube44\uc2b7\ud55c \uae30\uc220\uc744 \uc0ac\uc6a9\ud558\uc5ec \uac00\uc871\ub4e4\uc5d0\uac8c\uc11c \ub9ce\uc740 \ub3c8\uc744 \ud6d4\ucce4\ub2e4. (<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl2.html#resources\" cmimpressionsent=\"1\">\ucc38\uace0\uc790\ub8cc<\/A>). <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N101C7\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>OpenSSL\uacfc \ub514\uc9c0\ud138 \uc778\uc99d\uc11c<\/SPAN><\/A><\/P>\n<P>OpenSSL\uc740 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c \uc804\uc6a9\uc758 \ub0b4\ubd80 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uac16\uace0 \uc788\ub2e4. \uc5ec\ub7ec\ubd84\uc774 OpenSSL\uc758 \uc18c\uc2a4 \ucf54\ub4dc\ub97c \uc0ac\uc6a9\ud558\uace0 \uc788\ub2e4\uace0 \uac00\uc815\ud558\uace0, \uc774 \uc18c\uc2a4 \ucf54\ub4dc\ub294 crypto\/x509\uc640 crypto\/x509v3 \ub514\ub809\ud1a0\ub9ac \ubc11\uc5d0 \uc788\ub2e4. \uc774 \uc18c\uc2a4 \ucf54\ub4dc\ub294 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \ub2e4\ub8e8\ub294 \uc5ec\ub7ec \uad6c\uc870\ub4e4\uc744 \uc815\uc758\ud55c\ub2e4. \ud45c 1\uc744 \ubcf4\uc790. <\/P>\n<P><a class=\"con_link\" name=\"N101D1\" target=\"_blank\" rel=\"noopener\"><SPAN class=smalltitle>\ud45c 1. X.509 \uc778\uc99d\uc11c\uc640 \uad00\ub828\ud55c OpenSSL \uad6c\uc870 <\/SPAN><\/A><\/P>\n\n<TABLE border=0 cellSpacing=1 cellPadding=3 width=\"60%\">\n<TBODY>\n<TR vAlign=top>\n<TD><B>\uad6c\uc870<\/B> <\/TD>\n<TD><B>\uae30\ub2a5<\/B> <\/TD><\/TR>\n<TR vAlign=top>\n<TD>X509<\/TD>\n<TD>\ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc640 \uad00\ub828\ud55c \ubaa8\ub4e0 \ub370\uc774\ud130\ub97c \ud3ec\ud568\ud558\uace0 \uc788\ub2e4.<\/TD><\/TR>\n<TR vAlign=top>\n<TD>X509_ALGOR<\/TD>\n<TD>\uc778\uc99d\uc11c\uac00 \ub514\uc790\uc778 \ub420 \uc218 \uc788\ub294 \uc54c\uace0\ub9ac\uc998\uc744 \uc81c\uacf5\ud55c\ub2e4. <\/TD><\/TR>\n<TR vAlign=top>\n<TD>X509_VAL<\/TD>\n<TD>\uc778\uc99d\uc11c\uc758 \uc720\ud6a8 \uae30\uac04.<\/TD><\/TR>\n<TR vAlign=top>\n<TD>X509_PUBKEY<\/TD>\n<TD>\uc778\uc99d\uc11c(\ud2b9\ud788 RSA \ub610\ub294 DSA)\uc758 \uacf5\uac1c \ud0a4 \uc54c\uace0\ub9ac\uc998.<\/TD><\/TR>\n<TR vAlign=top>\n<TD>X509_SIG<\/TD>\n<TD>\uc778\uc99d\uc11c\uc758 \ud574\uc2dc \uc11c\uba85.<\/TD><\/TR>\n<TR vAlign=top>\n<TD>X509_NAME_ENTRY<\/TD>\n<TD>\uc778\uc99d\uc11c\uac00 \ud3ec\ud568\ud558\uace0 \uc788\ub294 \ub2e4\uc591\ud55c \ub370\uc774\ud130 \ud544\ub4dc\uc6a9 \uc5d4\ud2b8\ub9ac\ub4e4.<\/TD><\/TR>\n<TR vAlign=top>\n<TD>X509_NAME<\/TD>\n<TD>\ub124\uc784 \uc5d4\ud2b8\ub9ac \uc2a4\ud0dd \ud3ec\ud568.<\/TD><\/TR><\/TBODY><\/TABLE>\n\n<P>\uc774\ub294 \uad6c\uc870\uc758 \uc77c\ubd80\uc77c \ubfd0\uc774\ub2e4. OpenSSL \ub0b4\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \ub300\ubd80\ubd84\uc758 X.509 \uad6c\uc870\ub4e4\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c\ub294 \uc0ac\uc6a9\ub418\uc9c0 \uc54a\ub294\ub2e4. \uc704\uc5d0 \uc5f4\uac70\ub41c \uad6c\uc870\ub4e4 \uc911\uc5d0\uc11c, \uc774 \uae00\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ub450 \uac00\uc9c0\ub294 X509\uc640 X509_NAME\uc774\ub2e4. <\/P>\n<P>\ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \ub2e4\ub8e8\uace0 \ucc98\ub9ac\ud558\ub294\ub370 \uc0ac\uc6a9\ub418\ub294 \ub2e4\uc591\ud55c \ud568\uc218\ub4e4\uc774 \uad6c\uc870\uc5d0 \uc874\uc7ac\ud55c\ub2e4. \uc774 \ud568\uc218\ub4e4\uc740 \uc774 \ud568\uc218\ub4e4\uc774 \uc801\uc6a9\ub418\ub294 \uad6c\uc870\uc758 \uc774\ub984\uc744 \ub530\ub978\ub2e4. \uc608\ub97c \ub4e4\uc5b4, X509_NAME\uc73c\ub85c \uc2dc\uc791\ub418\ub294 \uc774\ub984\uc744 \uac00\uc9c4 \ud568\uc218\ub294 X509_NAME \uad6c\uc870\uc5d0 \uc801\uc6a9\ub41c\ub2e4. \uc774\ub7ec\ud55c \ud568\uc218\ub4e4\uc740 \ud544\uc694\ud55c \ub9cc\ud07c \uc0ac\uc6a9\ub420 \uac83\uc774\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1023D\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uace0\uc720\uc758 \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c \uc81c\uacf5\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\uc778\uc99d\uc11c\uc758 \uc2e0\ub8b0\uc131\uc744 \uac80\uc0ac\ud558\uae30 \uc804\uc5d0 \uae30\ubcf8\uc801\uc778 \uc2e0\uc6a9 \uc778\uc99d\uc11c \uc138\ud2b8\uac00 \ubcf4\uc548 \uc5f0\uacb0\uc744 \uc704\ud574 OpenSSL\uc744 \uc124\uc815\ud558\ub294 \ub3d9\uc548 \uc0dd\uc131\ub41c <CODE>SSL_CTX<\/CODE> \uac1d\uccb4\uc5d0 \uc81c\uacf5\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774\uac83\uc740 \uc5ec\ub7ec \uac00\uc9c0 \ubc29\uc2dd\uc73c\ub85c \uc81c\uacf5\ub420 \uc218 \uc788\uc9c0\ub9cc, \uac00\uc7a5 \uc26c\uc6b4 \ubc29\ubc95\uc740 \uc778\uc99d\uc11c\ub97c PEM \ud30c\uc77c \uc778\uc99d\uc11c\ub97c \uc0ac\uc6a9\ud558\uace0 <CODE>SSL_CTX_load_verify_locations(ctx, file, path);<\/CODE>\ub97c \uc0ac\uc6a9\ud558\uc5ec OpenSSL\uc5d0 \ub85c\ub529\ud55c\ub2e4. <CODE>file<\/CODE>\uc740 PEM \ud3ec\ub9f7\uc73c\ub85c \ud55c \uac1c \uc774\uc0c1\uc758 \uc778\uc99d\uc11c\ub97c \ud3ec\ud568\ud558\uace0 \uc788\ub294 \ud30c\uc77c\uc5d0 \ub300\ud55c \uacbd\ub85c\uc774\ub2e4. <CODE>path<\/CODE>\ub294 PEM \ud3ec\ub9f7\uc73c\ub85c \ub41c \ud55c \uac1c \uc774\uc0c1\uc758 \ud30c\uc77c\ub4e4\uc5d0 \ub300\ud55c \ub514\ub809\ud1a0\ub9ac \uacbd\ub85c\uc774\uc9c0\ub9cc, \ud30c\uc77c \uc774\ub984\uc740 \ud2b9\uc815 \ud3ec\ub9f7\uc774\uc5b4\uc57c \ud55c\ub2e4. \ud558\ub098\uc758 PEM \ud30c\uc77c\ub85c \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c\ub97c \uac16\ub294 \uac83\uc774 \ub354 \uc26c\uc6b0\uba70, \uacbd\ub85c \uc778\uc790\ub97c NULL\ub85c\uc11c \uc720\uc9c0\ud55c\ub2e4: <CODE>SSL_CTX_load_verify_locations(ctx, \"\/path\/to\/trusted.pem\", NULL);<\/CODE>. <\/P>\n<P>\ud558\ub098\uc758 \ud3f4\ub354\uc5d0 \uac1c\ubcc4 \ud30c\uc77c\uc77c \ub54c \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c\ub97c \ucd94\uac00 \ubc0f \uc5c5\ub370\uc774\ud2b8 \ud558\ub294 \uac83\uc774 \ub354 \uc27d\uc9c0\ub9cc, \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c\ub97c \uadf8\ub807\uac8c \uc790\uc8fc \uc5c5\ub370\uc774\ud2b8 \ud558\uc9c0\ub294 \uc54a\ub294\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1025E\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc778\uc99d\uc11c \ud655\uc778\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\ud1b5\uc2e0\uc774 \uc9c0\uc18d\ub418\uac70\ub098 \uc778\uc99d\uc11c\uac00 \uac80\uc0c9\ub418\uae30 \uc804\uc5d0, <CODE>SSL_get_verify_result()<\/CODE>\ub97c \uc0ac\uc6a9\ud558\uc5ec OpenSSL\uc758 \ub0b4\ubd80 \uc778\uc99d\uc11c \ud655\uc778\uc758 \uacb0\uacfc\ub97c \ud655\uc778\ud55c\ub2e4. <CODE>SSL_get_verify_result()<\/CODE>\uac00 X509_V_OK \uc774\uc678\uc758 \ucf54\ub4dc\ub97c \ub9ac\ud134\ud55c\ub2e4\uba74, \uc778\uc99d\uc11c\uac00 \ubb34\ud6a8\ud558\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud558\ub294 \uac83\uc77c\uae4c? \uc774\ub294 \ub9ac\ud134 \ucf54\ub4dc\uc5d0 \ub530\ub77c \ub2e4\ub974\ub2e4. <\/P>\n<P>\uc77c\ubc18\uc801\uc73c\ub85c \ub9ac\ud134 \ucf54\ub4dc\uac00 X509_V_OK\uac00 \uc544\ub2c8\ub77c\uba74, \uc774 \uc778\uc99d\uc11c\uc640 \uad00\ub828\ud558\uc5ec \uc778\uc99d\uc11c \ub610\ub294 \ubcf4\uc548\uc5d0 \ubb38\uc81c\uac00 \uc788\ub294 \uac83\uc774\ub2e4. \ud55c \uac00\uc9c0\ub9cc \uba85\uc2ec\ud558\ub77c. \uc778\uc99d\uc11c\ub97c \ud655\uc778\ud560 \ub54c OpenSSL\uc774 \uc218\ud589\ud558\uc9c0 \uc54a\ub294 \uba87 \uac00\uc9c0 \ubcf4\uc548 \uccb4\ud06c\uac00 \uc788\ub2e4. \uc778\uc99d\uc11c\uc758 \uacf5\uc6a9 \uc774\ub984\uc744 \uccb4\ud06c \ubc0f \ud655\uc778\ud558\ub294 \ucde8\uc18c\ub3c4 \uc5ec\uae30\uc5d0 \ud3ec\ud568\ub41c\ub2e4. <\/P>\n<P><CODE>SSL_get_verify_result()<\/CODE>\uc5d0 \ub300\ud55c \ub9ac\ud134 \ucf54\ub4dc\ub294 apps \ubc11\uc5d0 \uc788\ub294 <CODE>verify<\/CODE>\uc5d0 \ubb38\uc11c\ud654 \ub418\uc5b4 \uc788\ub2e4. \uc77c\ubd80 \ucf54\ub4dc\ub4e4\uc740 \uc0ac\uc6a9\ub418\uc9c0 \uc54a\ub294 \uac83\uc73c\ub85c \ub9ac\uc2a4\ud305 \ub418\ub294\ub370, \uc774\ub4e4\uc740 \uc808\ub300\ub85c \ub9ac\ud134\ub418\uc9c0 \uc54a\uc74c\uc744 \uc758\ubbf8\ud55c\ub2e4. \uc77c\ubd80 \ucf54\ub4dc\ub4e4\uc740 \ub9e4\uc6b0 \uc911\uc694\ud558\uace0, \uc77c\ubd80\ub294 \uadf8\ub807\uc9c0 \uc54a\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c \uc2a4\ud1a0\uc5b4\uac00 \ub85c\ub529\ub418\uc9c0 \uc54a\uc558\uae30 \ub54c\ubb38\uc5d0 \ud2b8\ub7ec\uc2a4\ud2b8\uac00 \ud655\uc778\ub420 \uc218 \uc5c6\ub2e4\uba74, \ud1b5\uc2e0\uc758 \uc9c0\uc18d \uc5ec\ubd80\ub294 \uac1c\ubc1c\uc790\uc5d0 \ub2ec\ub824\uc788\ub2e4. <\/P>\n<P>\ud655\uc778\uc758 \uacb0\uacfc\uac00 \uc5b4\ub5bb\ub4e0\uc9c0 \uac04\uc5d0, \uc7a0\uc7ac\uc801\uc73c\ub85c \ubd88\uc548\ud55c \ubcf4\uc548 \ub9e4\uac1c\ubcc0\uc218\ub4e4\ub85c \uc9c0\uc18d\ud558\ub294 \uac83\uc740 \uac1c\ubc1c\uc790\uc758 \ubaab\uc774\ub2e4. \uc778\uc99d\uc11c\uac00 \ub9e4\uc6b0 \ubd88\uc548\ud558\uba74 \uc5d0\ub7ec \ub9ac\ud134 \ucf54\ub4dc\ub4e4\uc774 \uc8fc\uc5b4\uc9c4\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N10281\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ud53c\uc5b4(peer) \uc778\uc99d\uc11c \uac80\uc0c9\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\uc778\uc99d\uc11c\ub97c \uc0ac\uc6a9\uc790\uc5d0\uac8c \ub514\uc2a4\ud50c\ub808\uc774 \ud558\uac70\ub098 \ud638\uc2a4\ud2b8 \ub124\uc784 \ub610\ub294 \uc778\uc99d\uc11c \uae30\uad6c\uc5d0 \ube44\uad50\ud558\uc5ec \uc774\ub97c \ud655\uc778\ud574\uc57c \ud55c\ub2e4\uba74 \ud53c\uc5b4(peer) \uc778\uc99d\uc11c\ub97c \uac00\uc838\uc640\uc57c \ud55c\ub2e4. \ud14c\uc2a4\ud2b8 \uacb0\uacfc\ub97c \ud655\uc778\ud55c \ud6c4\uc5d0 \uc778\uc99d\uc11c\ub97c \uac00\uc838\uc624\ub824\uba74, <CODE>SSL_get_peer_certificate()<\/CODE>\ub97c \ud638\ucd9c\ud55c\ub2e4. \uc774\uac83\uc740 X509 \ud3ec\uc778\ud130\ub97c \uc778\uc99d\uc11c\uc5d0 \ub9ac\ud134\ud558\uace0, \uc5b4\ub5a4 \uc778\uc99d\uc11c\ub3c4 \uc81c\uacf5\ub418\uc9c0 \uc54a\uc744 \uacbd\uc6b0 NULL\uc744 \ub9ac\ud134\ud55c\ub2e4. (Listing 1). <\/P><br \/><a class=\"con_link\" name=\"N10293\" target=\"_blank\" rel=\"noopener\"><B>Listing 1. \ud53c\uc5b4 \uc778\uc99d\uc11c \uac00\uc838\uc624\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>                <br \/>X509 * peerCertificate;<br \/><br \/><br \/>if(SSL_get_verify_result(ssl) == X509_V_OK)<br \/>    peerCertificate = SSL_get_peer_certificate(ssl);<br \/>else<br \/>{<br \/>    \/* Handle verification error here *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1029A\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ud53c\uc5b4 \uc778\uc99d\uc11c \ud655\uc778\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\ud578\ub4dc\uc250\uc774\ud06c\uc5d0\uc11c \uc81c\uacf5\ub41c \uc11c\ubc84\uc758 \uc778\uc99d\uc11c\ub294 \uc11c\ubc84\uc758 \ud638\uc2a4\ud2b8 \ub124\uc784\uacfc \ub9e4\uce58\ud558\ub294 \uac83\uc5d0 \ub300\ud55c \uc774\ub984\uc744 \uac00\uc838\uc57c \ud55c\ub2e4. \uadf8\ub807\uc9c0 \uc54a\ub2e4\uba74, \uc778\uc99d\uc11c\ub294 \uc758\uc2ec\uc2a4\ub7ec\uc6b4 \uac83\uc73c\ub85c \ud45c\uc2dc\ub418\uc5b4\uc57c \ud55c\ub2e4. \ub0b4\ubd80 \ud655\uc778 \uc808\ucc28\ub294 \uc774\ubbf8 \ud2b8\ub7ec\uc2a4\ud2b8\uc640 \uc885\ub8cc\uc5d0 \ub300\ud574 \uc778\uc99d\uc11c\ub97c \uac80\uc0ac\ud55c\ub2e4. \uc778\uc99d\uc11c\uac00 \uc885\ub8cc\ub418\uc5c8\uac70\ub098 \ubbff\uc744 \uc218 \uc5c6\ub294 \uc11c\uba85\uc744 \ud3ec\ud568\ud558\uace0 \uc788\ub2e4\uba74 \ubb34\ud6a8\ub85c \ud45c\uc2dc\ub41c\ub2e4. \uc774\uac83\uc740 SSL \ud45c\uc900\uc758 \uc77c\ubd80\uac00 \uc544\ub2c8\ubbc0\ub85c OpenSSL\uc740 \ud638\uc2a4\ud2b8 \ub124\uc784\uc5d0 \ub300\ud574 \uc778\uc99d\uc11c\uc758 \uc774\ub984\uc744 \uac80\uc0ac\ud558\uc9c0 \uc54a\ub294\ub2e4. <\/P>\n<P>\uc778\uc99d\uc11c\uc758 \"\uc774\ub984\"\uc740 \uc2e4\uc81c\ub85c \uc778\uc99d\uc11c \uc0c1\uc758 Common Name \ud544\ub4dc\uc774\ub2e4. \uc774 \ud544\ub4dc\ub294 \uc778\uc99d\uc11c\uc5d0\uc11c \uac00\uc838\uc628 \uac83\uc774\uc5b4\uc57c \ud558\uba70 \ud638\uc2a4\ud2b8 \ub124\uc784\uc5d0 \ube44\uad50\ud558\uc5ec \ud655\uc778\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774 \ub450 \uac00\uc9c0\uac00 \ub9e4\uce58\ub418\uc9c0 \uc54a\uc73c\uba74, \uc778\uc99d\uc11c\ub294 \ubb34\ud6a8\uac00 \uc544\ub2cc \uc758\uc2ec \uc0c1\ud0dc\uac00 \ub41c\ub2e4. Yahoo! \uac19\uc740 \uc77c\ubd80 \uae30\uc5c5\ub4e4\uc740 \ub2e4\uc591\ud55c \ud638\uc2a4\ud2b8\uc5d0 \uac19\uc740 \uc778\uc99d\uc11c\ub97c \uc0ac\uc6a9\ud55c\ub2e4. \uadf8 \uc778\uc99d\uc11c\uc5d0 \ub300\ud55c Common Name\uc774 \ub2e8 \ud55c \uac1c\uc758 \ud638\uc2a4\ud2b8\ub97c \uc704\ud55c \uac83\uc778\ub370\ub3c4 \ub9d0\uc774\ub2e4. \uc778\uc99d\uc11c\uac00 \uac19\uc740 \ud68c\uc0ac\uc5d0\uc11c \uc628 \uac83\uc778\uc9c0\ub97c \ud655\uc778\ud558\uae30 \uc704\ud574 \ubcf4\ub2e4 \uc2ec\ub3c4 \uae4a\uc740 \uccb4\ud06c\uac00 \uc218\ud589\ub418\uc9c0\ub9cc, \uc774\ub294 \ud504\ub85c\uc81d\ud2b8\uc758 \ubcf4\uc548 \ud544\uc694\uc5d0 \ub530\ub77c \uc218\ud589\ud55c\ub2e4. <\/P>\n<P>\uc778\uc99d\uc11c\uc5d0\uc11c \uacf5\ud1b5 \uc774\ub984\uc744 \uac00\uc838\uc624\ub294 \ub2e8\uacc4\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4. <\/P>\n<UL>\n<LI>\uc778\uc99d\uc11c \uad6c\uc870\uc5d0\uc11c <CODE>X509_NAME<\/CODE> \uac1d\uccb4\ub97c \uac00\uc838\uc628\ub2e4. \n<LI><CODE>X509_NAME<\/CODE> \uac1d\uccb4\uc5d0\uc11c \uc774\ub984\uc744 \uac00\uc838\uc628\ub2e4. <\/LI><\/UL>\n<P><CODE>X509_get_subject_name()<\/CODE>\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc778\uc99d\uc11c\uc5d0\uc11c <CODE>X509_NAME<\/CODE> \uad6c\uc870\ub97c \uac00\uc838\uc628\ub2e4. \uc774\uac83\uc740 <CODE>X509_NAME<\/CODE> \uac1d\uccb4\uc5d0 \ub300\ud55c \ud3ec\uc778\ud130\ub97c \ub9ac\ud134\ud55c\ub2e4. \uc5ec\uae30\uc11c\ubd80\ud130 <CODE>X509_NAME_get_text_by_NID()<\/CODE>\ub97c \uc0ac\uc6a9\ud558\uc5ec \uacf5\ud1b5 \uc774\ub984\uc744 \uc2a4\ud2b8\ub9c1\uc73c\ub85c \uac00\uc838\uc628\ub2e4. (Listing 2).<\/P><br \/><a class=\"con_link\" name=\"N102D2\" target=\"_blank\" rel=\"noopener\"><B>Listing 2. Common Name \uac80\uc0c9 \ubc0f \ud655\uc778 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>                <br \/>char commonName [512];<br \/>X509_NAME * name = X509_get_subject_name(peerCertificate);<br \/>X509_NAME_get_text_by_NID(name, NID_commonName, commonName, 512);<br \/><br \/>\/* More in-depth checks of the common name can be used if necessary *\/<br \/><br \/>if(stricmp(commonName, hostname) != 0)<br \/>{<br \/>    \/* Handle a suspect certificate here *\/<br \/><br \/><\/PRE>\n<BLOCKQUOTE>\ubcf4\uc548 \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc5c6\uc774\ub294, \ubcf4\uc548 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\ub3c4 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. OpenSSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubcf4\uc548 \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\ub4e4\uc744 \uc0dd\uc131\ud560 \uc218 \uc788\uace0, \ubb38\uc11c\ud654\uac00 \uc644\uc804\ud558\uc9c0 \uc54a\uc544\ub3c4 \uc5b4\ub835\uc9c0\ub294 \uc54a\uc2b5\ub2c8\ub2e4. \ubcf8 <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/views\/linux\/articles.jsp?expand=&amp;sort_order=desc&amp;search_by=OpenSSL+API+%EB%B3%B4%EC%95%88&amp;show_abstract=true&amp;sort_by=%EB%82%A0%EC%A7%9C&amp;view_by=Search\" cmimpressionsent=\"1\">3\uac1c \uc2dc\ub9ac\uc988<\/A>\uc758 <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\" cmimpressionsent=\"1\">Part 1<\/A>\uc5d0\uc11c \uc124\uba85\ud55c \uac1c\ub150\uc744 \uae30\ubc18\uc73c\ub85c \ubcf4\uc548 \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6cc\ubd05\uc2dc\ub2e4. <\/BLOCKQUOTE><!--START RESERVED FOR FUTURE USE INCLUDE FILES--><!-- include java script once we verify teams wants to use this and it will work on dbcs and cyrillic characters --><!--END RESERVED FOR FUTURE USE INCLUDE FILES-->\n<P>\ubcf8 \uc2dc\ub9ac\uc988\uc758 \ub450 Part\uc5d0\uc11c\ub294 OpenSSL\uc744 \uc774\uc6a9\ud55c \ud074\ub77c\uc774\uc5b8\ud2b8 \uce21 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uad6c\ud604\uc5d0 \ub300\ud574 \uc124\uba85\ud588\ub2e4. <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\" cmimpressionsent=\"1\">Part 1<\/A>\uc5d0\uc11c\ub294 OpenSSL\uc744 \uc0ac\uc6a9\ud55c \uae30\ubcf8 \ubcf4\uc548 \ud074\ub77c\uc774\uc5b8\ud2b8\ub97c \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud588\uace0, <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl2.html\" cmimpressionsent=\"1\">Part 2<\/A>\uc5d0\uc11c\ub294 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc124\uba85\ud588\ub2e4. \ubcf8 \uae30\uc220\uc790\ub8cc\uc5d0 \ub300\ud574 \uc774\uba54\uc77c\uacfc \uae0d\uc815\uc801\uc778 \ud53c\ub4dc\ubc31\uc744 \ubc1b\uace0 \ub098\uc11c, \ub2e4\uc74c\uc5d0\ub294 \uc5b4\ub5a4 \ub17c\uc758\ub97c \uc774\uc5b4\uac00\uc57c \ud560\uc9c0 \uba85\ud655\ud574 \uc84c\ub2e4.<\/P><br \/>\n<P>\uc11c\ubc84\ub294 \ub124\ud2b8\uc6cc\ud06c\uc640 \uc778\ud130\ub137\uc5d0 \ud30c\uc77c\uacfc \uc7a5\uce58\uc640 \uac19\uc740 \ub9ac\uc18c\uc2a4\ub85c\uc758 \uc561\uc138\uc2a4\ub97c \uc81c\uacf5\ud55c\ub2e4. \uac00\ub054\uc529, \uc774\ub7ec\ud55c \uc11c\ube44\uc2a4\ub4e4\uc744 \ubcf4\uc548 \ucc44\ub110\uc744 \ud1b5\ud574\uc11c \uc81c\uacf5\ud574\uc57c \ud560 \ub54c\ub3c4 \uc788\ub2e4. OpenSSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubcf4\uc548 \ubc0f \uc624\ud508 \ucc44\ub110\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc11c\ube44\uc2a4\ub97c \ub9cc\ub4e4 \uc218 \uc788\ub2e4.<\/P>\n<P>OpenSSL\uc744 \uc774\uc6a9\ud558\uc5ec \uae30\ubcf8\uc801\uc778 \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc0dd\uc131\ud558\ub294 \uac83\uc740 \uae30\ubcf8\uc801\uc778 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uad6c\ud604\ud558\ub294 \uac83\uacfc \ubcf8\uc9c8\uc801\uc73c\ub85c <I>\uac70\uc758<\/I> \uac19\ub2e4. \ucc28\uc774\uc810\uc740 \ube44\uad50\uc801 \uc801\ub2e4. \ubd84\uba85\ud55c \uac83\uc740 \uc11c\ubc84\ub294 \uc544\uc6c3\uace0\uc789 \uc5f0\uacb0\uc744 \uc0dd\uc131\ud558\ub294 \ub300\uc2e0 \uc778\ucee4\ubc0d \uc5f0\uacb0\uc744 \uc218\ub77d\ud558\ub3c4\ub85d \uc124\uc815\ub418\uc5b4\uc57c \ud55c\ub2e4\ub294 \uc810\uc774\ub2e4. \ubcf8 \uc2dc\ub9ac\uc988 Part 2\uc758 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc5d0 \ub300\ud55c \uae00\uc744 \uae30\uc5b5\ud574 \ubcf4\uba74 \uc54c\uaca0\uc9c0\ub9cc, \uc11c\ubc84\ub294 \ud578\ub4dc\uc250\uc774\ud06c \ub3d9\uc548 \uc0ac\uc6a9\ub418\ub294 \ubcf4\uc548 \uc778\uc99d\uc11c\ub3c4 \uc81c\uacf5\ud574\uc57c \ud55c\ub2e4. <\/P>\n<P><a class=\"con_link\" name=\"N1015C\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uae30\ub2e4\ub9ac\uae30<\/SPAN><\/A><\/P>\n<P>\uc11c\ubc84\ub4e4\uc740 \uc778\ucee4\ubc0d \uc5f0\uacb0\uc744 \uadf8\uc800 \uae30\ub2e4\ub9ac\ub294 \uac83\uc774 \uc804\ubd80\uc774\ub2e4. \uacb0\uad6d, \uc774\uac83\uc740 \uc11c\ubc84\uac00 \uc874\uc7ac\ud558\ub294 \uc774\uc720\uc774\ub2e4. \uc6f9 \uc11c\ubc84\ub4e4\uc740 \ube0c\ub77c\uc6b0\uc800\uac00 \ud398\uc774\uc9c0\ub97c \uc694\uccad\ud558\uae30\ub97c \uae30\ub2e4\ub9ac\uace0, FTP \uc11c\ubc84\ub4e4\uc740 \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \ud30c\uc77c\uc744 \uc694\uccad\ud558\uae30\ub97c \uae30\ub2e4\ub9ac\uba70, \ucc44\ud305 \uc11c\ubc84\ub294 \uc778\ucee4\ubc0d \ucc44\ud305 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc5f0\uacb0\uc744 \uae30\ub2e4\ub9b0\ub2e4. \uc11c\ubc84\ub294 \uadf8\uc800 \uae30\ub2e4\ub9b4 \ubfd0\uc774\ub2e4.<\/P>\n<P>\ud578\ub4dc\uc250\uc774\ud06c\uc758 \uad00\uc810\uc5d0\uc11c \uc11c\ubc84\uac00 \ub3d9\uc804\uc758 \ub2e4\ub978 \ucabd\uc5d0 \uc788\ub2e4\ub294 \uac83\uc744 \uc81c\uc678\ud558\uace0\ub294 \ubcf4\uc548 \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84 \ud1b5\uc2e0\uac04\uc5d0\ub294 \uac70\uc758 \ucc28\uc774\uac00 \uc5c6\ub2e4. \ubaa8\ub4e0 \uac83\uc774 \uac19\ub2e4.<\/P>\n<P>\ub530\ub77c\uc11c, \uc5ec\ub7ec\ubd84\uc774 OpenSSL\uc744 \uc774\uc6a9\ud558\uc5ec \ud074\ub77c\uc774\uc5b8\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc791\uc131\ud558\ub294 \ubc29\ubc95\ub9cc \uc54c\uace0 \uc788\ub2e4\uba74 OpenSSL\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubcf4\uc548 \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uad6c\ud604\ud558\ub294 \uac83\uc740 \uc2dd\uc740\uc8fd \uba39\uae30\ub2e4. (\uadf8\ub807\uc9c0 \uc54a\ub2e4\uba74, \ubcf8 \uc2dc\ub9ac\uc988 Part 1, \"<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\" cmimpressionsent=\"1\">API\uc758 \uac1c\uc694<\/A>\"\uc5d0\uc11c OpenSSL \ub77c\uc774\ube0c\ub7ec\ub9ac \uc124\uc815 \ubc29\ubc95\uc744 \ubc30\uc6b0\uae30 \ubc14\ub780\ub2e4.) <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N1016E\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ub450 \uac00\uc9c0 \ud615\ud0dc\uc758 \uc2dd\ubcc4<\/SPAN><\/A><\/P>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"40%\" align=right>\n<TBODY>\n<TR>\n<TD width=10><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=10 height=1><\/TD>\n<TD>\n<TABLE border=1 cellSpacing=0 cellPadding=5 width=\"100%\">\n<TBODY>\n<TR>\n<TD bgColor=#eeeeee><a class=\"con_link\" name=\"sslcontext\" target=\"_blank\" rel=\"noopener\"><B>SSL \ucf58\ud14d\uc2a4\ud2b8<\/B><\/A><br \/>\n<P>\uc774 \uae00\uc5d0\uc11c \uc0ac\uc6a9\ud560 SSL \ucf58\ud14d\uc2a4\ud2b8\ub97c \uc124\uc815\ud558\ub824\uba74 \ub2e4\uc74c \ucf54\ub4dc\ub97c \uc0ac\uc6a9\ud558\ub77c. \uc774 \ud568\uc218\ub294 \uc5d0\ub7ec \uc2dc NULL\uc744 \ub9ac\ud134\ud560 \uac83\uc774\ub2e4.<\/P>\n<P><CODE>SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method()); <\/CODE><\/P><\/TD><\/TR><\/TBODY><\/TABLE><\/TD><\/TR><\/TBODY><\/TABLE>\n<P>\ub610\ub294 \ub450 \uac1c\uc758 \uc2dd\ubcc4 \ubc29\ubc95\uc774\ub77c\uace0\ub3c4 \ud560 \uc218 \uc788\ub2e4. <\/P>\n<P>\uc11c\ubc84\ub294 \ud578\ub4dc\uc250\uc774\ud06c \ub3d9\uc548 \uc0ac\uc6a9\ub420 \ubcf4\uc548 \uc778\uc99d\uc11c\ub97c \uc81c\uacf5\ud560 \ucc45\uc784\uc774 \uc788\ub2e4. \uc644\uc804\ud55c \uc11c\ubc84 \uc778\uc99d\uc11c\ub294 \ub450 \ubd80\ubd84, \uacf5\uac1c \ud0a4(public key)\uc640 \uac1c\uc778 \ud0a4(private key)\ub85c \uad6c\uc131\ub41c\ub2e4. \uacf5\uac1c \ud0a4\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\ub85c \ubcf4\ub0b4\uc9c0\ub294 \uac83\uc774\uace0, \uac1c\uc778 \ud0a4\ub294 \ube44\ubc00\ub85c \uc720\uc9c0\ub41c\ub2e4.<\/P>\n<P>\ud2b8\ub7ec\uc2a4\ud2b8 \uc778\uc99d\uc11c\uac00 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc6a9 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \uc81c\uacf5\ub418\uc5b4\uc57c \ud558\ub294 \uac83\ucc98\ub7fc, \uc11c\ubc84 \ud0a4\ub4e4\ub3c4 \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc6a9 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \uc81c\uacf5\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774\ub97c \uc81c\uacf5\ud558\ub294 \uc5ec\ub7ec \ud568\uc218\ub4e4\uc774 \uc788\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N10190\" target=\"_blank\" rel=\"noopener\"><B>Listing 1. \uc11c\ubc84 \uc778\uc99d\uc11c\ub97c \ub85c\ub529\ud558\ub294 \ud568\uc218\ub4e4 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>SSL_CTX_use_certificate(SSL_CTX *, X509 *)<br \/>SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, unsigned char *d);<br \/>SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P><CODE>ASN1<\/CODE> \ud568\uc218\ub294 ASN1-encoded \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \uc9c0\uc815\ub41c \uba54\ubaa8\ub9ac \uc704\uce58\uc5d0\uc11c SSL \ucf58\ud14d\uc2a4\ud2b8\ub85c \ub85c\ub529\ud55c\ub2e4. \uccab \ubc88\uc9f8 \ud568\uc218\ub294 \uc8fc\uc5b4\uc9c4 \uba54\ubaa8\ub9ac \uad6c\uc870\uc5d0 \uc81c\uacf5\ub41c X.509 \uc778\uc99d\uc11c\ub97c \ub85c\ub529\ud558\uc9c0\ub9cc, \ub9c8\uc9c0\ub9c9 \ud568\uc218, <CODE>_file<\/CODE>\uc740 PEM-encoded \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \ud30c\uc77c\uc5d0\uc11c \ub85c\ub529\ud55c\ub2e4. \uc774 \ud568\uc218\uc758 <CODE>type<\/CODE> \ub9e4\uac1c\ubcc0\uc218\ub294 DER-encoded \uc778\uc99d\uc11c\uac00 \ub85c\ub529\ub418\ub3c4\ub85d \ud55c\ub2e4.<\/P>\n<P>\uac1c\uc778 \ud0a4\ub97c \ub85c\ub529\ud558\ub824\uba74, \ub2e4\uc74c \ud568\uc218\ub4e4 \uc911 \ud558\ub098\ub97c \uc0ac\uc6a9\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N101AB\" target=\"_blank\" rel=\"noopener\"><B>Listing 2. \uac1c\uc778 \ud0a4 \ub85c\ub529\uc744 \uc704\ud55c \ud568\uc218\ub4e4 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);<br \/>SSL_CTX_use_PrivateKey_ASN1(int pk, SSL_CTX *ctx, unsigned char *d, long len);<br \/>SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type);<br \/>SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa);<br \/>SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, unsigned char *d, long len);<br \/>SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N101B4\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uba87 \uac00\uc9c0 \ud544\uc218 \uc778\ud130\ub799\uc158<\/SPAN><\/A><\/P>\n<P>\uc5b4\ub5a4 \uac1c\uc778 \ud0a4\ub77c\ub3c4 \uc554\ud638\ud654 \ub418\uc5b4 \uc800\uc7a5\ub41c\ub2e4. \ubb38\uc81c\ub294, \uc778\uc99d\uc11c\ub97c \ub85c\ub529\ud558\ub294 \ud568\uc218\ub4e4\uc774 \uc554\ud638\ud654 \ub41c \uc778\uc99d\uc11c\uc5d0 \ud328\uc2a4\uc6cc\ub4dc\ub97c \uc694\uccad\ud558\uc9c0 \uc54a\ub294\ub2e4\ub294 \uc810\uc774\ub2e4. \ub300\uc2e0, OpenSSL\uc740 \ud328\uc2a4\uc6cc\ub4dc\ub97c \uc5bb\uc744 \ub54c \ucf5c\ubc31 \uba54\ucee4\ub2c8\uc998\uc744 \uc81c\uacf5\ud55c\ub2e4.<\/P>\n<P>\ucf5c\ubc31\uc758 \ud3ec\ub9f7\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/P><br \/><a class=\"con_link\" name=\"N101BF\" target=\"_blank\" rel=\"noopener\"><B>Listing 3. \ucf5c\ubc31 \ud3ec\ub9f7<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>int password_callback(char *buf, int size, int rwflag, void *userdata);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uc774 \uae00\uc758 \ubaa9\uc801\uc0c1, \ub9c8\uc9c0\ub9c9 \ub9e4\uac1c\ubcc0\uc218, <CODE>userdata<\/CODE>\ub294 \ud544\uc694\ud558\uc9c0 \uc54a\ub2e4. \ud568\uc218\uac00 \ud638\ucd9c\ub418\uae30 \uc804\uc5d0 \ubc84\ud37c\uac00 \ud560\ub2f9\ub418\uae30 \ub54c\ubb38\uc5d0 \uc5ec\ub7ec\ubd84\uc5d0\uac8c\ub294 \ubc84\ud37c\uc758 \ud06c\uae30\uc5d0 \ub300\ud55c \uc81c\uc5b4\uad8c\uc774 \uc5c6\ub2e4.<\/P>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"40%\" align=right>\n<TBODY>\n<TR>\n<TD width=10><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=10 height=1><\/TD>\n<TD>\n<TABLE border=1 cellSpacing=0 cellPadding=5 width=\"100%\">\n<TBODY>\n<TR>\n<TD bgColor=#eeeeee><a class=\"con_link\" name=\"N101D1\" target=\"_blank\" rel=\"noopener\"><B>\uc11c\ubc84 \uac1c\uc778 \ud0a4<\/B><\/A><br \/>\n<P>\uc11c\ubc84 \uc778\uc99d\uc11c\uc758 \uacbd\uc6b0, \uac1c\uc778 \ud0a4\ub294 \uc554\ud638\ud654 \ub418\uc5b4 \uc800\uc7a5\ub418\uc5b4\uc11c\ub294 \uc548\ub41c\ub2e4. \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74, \uad00\ub9ac\uc790\uac00 \ud328\uc2a4\uc6cc\ub4dc\ub97c \ub108\ubb34 \uc790\uc8fc \uc785\ub825\ud574\uc57c \ud55c\ub2e4. <\/P><\/TD><\/TR><\/TBODY><\/TABLE><\/TD><\/TR><\/TBODY><\/TABLE>\n<P>\ub9e4\uac1c\ubcc0\uc218 <CODE>rwflag<\/CODE>\ub294 \uc77d\uae30\/\uc4f0\uae30 \ud50c\ub798\uadf8\uc774\ub2e4. \ud328\uc2a4\uc6cc\ub4dc\uac00 \uc815\ubcf4\ub97c \uc554\ud638\ud654 \ud558\ub294\ub370 \uc0ac\uc6a9\ub418\ub294\uc9c0(<CODE>rwflag<\/CODE> = 1) \uc544\ub2c8\uba74 \uc815\ubcf4\ub97c \ud574\ub3c5\ud558\ub294\ub370 \uc0ac\uc6a9\ub418\ub294\uc9c0(<CODE>rwflag<\/CODE> = 0) \uc5ec\ubd80\ub97c \ud504\ub85c\uadf8\ub798\ubc0d \ubc29\uc2dd\uc73c\ub85c \uacb0\uc815\ud558\uae30 \uc704\ud574 \uc0ac\uc6a9\ub41c\ub2e4. \ub370\uc774\ud130\ub97c \uc554\ud638\ud654 \ud558\uae30 \uc704\ud574 \ud328\uc2a4\uc6cc\ub4dc\ub97c \uc694\uccad\ud558\uae30 \uc704\ud574 \ucf5c\ubc31\uc774 \uc0ac\uc6a9\ub41c\ub2e4\uba74, \ud328\uc2a4\uc6cc\ub4dc\ub97c \ub450 \ubc88 \uc694\uccad\ud558\uc5ec \uc624\ud0c0\ub97c \ubc29\uc9c0\ud560 \uc218 \uc788\ub2e4. <\/P>\n<P>\ud328\uc2a4\uc6cc\ub4dc\ub294 \uc778\uc99d\uc11c\uac00 \ub85c\ub529\ub420 \ub54c \ub2e8 \ud55c\ubc88 \uc694\uccad\ub418\uae30 \ub54c\ubb38\uc5d0, \ud574\ub3c5\ub418\uace0 \uba54\ubaa8\ub9ac\uc5d0 \uc800\uc7a5\ub420 \uc218 \uc788\ub2e4. \uc0ac\uc6a9\uc790\uc5d0\uac8c\uc11c \ud328\uc2a4\uc6cc\ub4dc\ub97c \ud68d\ub4dd\ud558\ub294 \ubc29\ubc95\uc740 \uad6c\ud604\uc5d0 \uc804\uc801\uc73c\ub85c \ub2ec\ub824\uc788\ub2e4. <\/P>\n<P>\ud328\uc2a4\uc6cc\ub4dc \ucf5c\ubc31 \ud568\uc218\ub97c \uc0dd\uc131\ud588\ub2e4\uba74, \uc774\uac83\uc744 <CODE>SSL_CTX_set_default_passwd_cb<\/CODE>\ub97c \uc0ac\uc6a9\ud558\uc5ec SSL \ucf58\ud14d\uc2a4\ud2b8\uc5d0 \uc124\uce58\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N101F3\" target=\"_blank\" rel=\"noopener\"><B>Listing 4. \ucf5c\ubc31 \ud568\uc218 \uc124\uce58\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>\/* ctx is a pointer to a previously created SSL context, and cb is the pointer<br \/> * to the callback function you created.<br \/> *\/<br \/><br \/>SSL_CTX_set_default_passwd_cb(ctx, cb);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N101FC\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\ud0a4 \uc2e4\ud589\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\ucf5c\ubc31 \ud568\uc218\uac00 \uc0dd\uc131\ub418\uc5b4 \uc0ac\uc6a9\uc790\uc5d0\uac8c \ud328\uc2a4\uc6cc\ub4dc\ub97c \ubb3b\ub294 \ud504\ub86c\ud504\ud2b8\uac00 \uc0dd\uacbc\uc73c\ub2c8, \uc778\uc99d\uc11c\ub97c \uc2e4\uc81c\ub85c \uac00\uc838\uc624\ub294 \ud568\uc218\uac00 \uc0ac\uc6a9\ub420 \uc218 \uc788\ub2e4. \uc778\uc99d\uc11c\ub294 \uae30\uc874 \uba54\ubaa8\ub9ac \uad6c\uc870\ub098 \ud30c\uc77c\uc5d0\uc11c \uac00\uc838\uc62c \uc218 \uc788\ub2e4. <\/P>\n<P>Apache HTTP Server Project\uc758 \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ucc98\ub7fc, \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\ub97c \ub2e4\ub8e8\ub294 \uc77c\ubc18\uc801\uc778 \ubc29\uc2dd\uc5d0 \ub354\ud558\uc5ec \uc778\uc99d\uc11c\ub97c \ub85c\ub529\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud558\uaca0\ub2e4. \ubcf8 \uc2dc\ub9ac\uc988\uc758 <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\" cmimpressionsent=\"1\">Part 1<\/A>\uc744 \uc77d\uc5c8\ub2e4\uba74, \uc778\uc99d\uc11c\ub97c \ub85c\ub529\ud558\ub294 \uac83\uc740 \ud2b8\ub7ec\uc2a4\ud2b8 \uc2a4\ud1a0\uc5b4\uac00 \uc774\uc804 \uae30\uc220 \uc790\ub8cc\uc758 \ub370\ubaa8\uc5d0\uc11c \ub85c\ub529\ub41c \ubc29\uc2dd\uacfc \ube44\uc2b7\ud558\ub2e4\ub294 \uac83\uc744 \uc54c \uc218 \uc788\uc744 \uac83\uc774\ub2e4. <\/P>\n<P>\ud074\ub77c\uc774\uc5b8\ud2b8\ub85c \ubcf4\ub0b4\uc9c0\ub294 \uac83 \uc911 \ud558\ub098\uc778 \uacf5\uac1c \uc778\uc99d\uc11c\ub85c \uc2dc\uc791\ud558\uaca0\ub2e4.<\/P><br \/><a class=\"con_link\" name=\"N10210\" target=\"_blank\" rel=\"noopener\"><B>Listing 5. \uacf5\uac1c \uc778\uc99d\uc11c \ub85c\ub529\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>\/**<br \/> * ctx is the SSL context created earlier<br \/> *\/<br \/><br \/>if(SSL_CTX_use_certificate_file(ctx, \"\/path\/to\/certificate.pem\", SSL_FILETYPE_PEM) &lt; 1)<br \/>{<br \/>    \/* Handle failed load here *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uacf5\uac1c \uc778\uc99d\uc11c\uac00 \ub85c\ub529\ub41c \ud6c4\uc5d0, \uac1c\uc778 \uc778\uc99d\uc11c\ub3c4 \ub85c\ub529\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774 \ubd80\ubd84\uc740 \ud578\ub4dc\uc250\uc774\ud06c \ub3d9\uc548 \ud544\uc694\ud558\ub2e4. \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \uacf5\uac1c \uc778\uc99d\uc11c\ub85c \uc554\ud638\ud654 \ub41c \uc815\ubcf4\ub97c \uc11c\ubc84\ub85c \ubcf4\ub0bc \uac83\uc774\uae30 \ub54c\ubb38\uc774\ub2e4. \uc774 \ub370\uc774\ud130\ub294 \uac1c\uc778 \ud0a4\ub97c \uc0ac\uc6a9\ud574\uc11c \ud574\ub3c5\ub420 \uc218 \uc788\ub2e4. \uc77c\uad00\uc131\uc744 \uc720\uc9c0\ud558\uae30 \uc704\ud574, \ud30c\uc77c\uc5d0\uc11c \ud0a4\ub97c \ub85c\ub529\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N1021C\" target=\"_blank\" rel=\"noopener\"><B>Listing 6. \uac1c\uc778 \ud0a4 \ub85c\ub529\ud558\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>if(SSL_CTX_use_PrivateKey_file(ctx, \"\/path\/to\/private.key\", SSL_FILETYPE_PEM) &lt; 1)<br \/>{<br \/>    \/* Handle failed load here *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N10225\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc124\uc815 \ub05d\ub0b4\uae30<\/SPAN><\/A><\/P>\n<P>\ucf58\ud14d\uc2a4\ud2b8(<A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl3.html#sslcontext\" cmimpressionsent=\"1\">SSL \ucf58\ud14d\uc2a4\ud2b8 \uc0ac\uc774\ub4dc\ubc14<\/A> \ucc38\uc870)\ub97c \uc124\uc815\ud558\uace0 \ud0a4\ub97c \ub85c\ub529\ud588\ub2e4\uba74, \uc774\uc81c\ub294 BIO \uac1d\uccb4\ub97c \uc0dd\uc131\ud558\uc5ec \uc124\uc815\uc744 \ub05d\ub0bc \ucc28\ub840\uc774\ub2e4. <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\" cmimpressionsent=\"1\">Part 1<\/A>\uc5d0\uc11c\ub294 OpenSSL\uc758 BIO \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec SSL\uacfc \ube44 SSL \ud1b5\uc2e0 \ubaa8\ub450\ub97c \uad6c\ucd95\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud588\ub2e4. \uc77c\uad00\uc131\uc744 \uc720\uc9c0\ud558\uae30 \uc704\ud574, \uac19\uc740 \uac83\uc774 \uc774 \uacf3\uc5d0\uc11c\ub3c4 \uc218\ud589\ub41c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N10235\" target=\"_blank\" rel=\"noopener\"><B>Listing 7. BIO \ud3ec\uc778\ud130<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>BIO *bio, *abio, *out;<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\uc138 \uac1c\uc758 BIO \uac1d\uccb4\ub4e4? \uc65c \uc138 \uac1c\uc529\uc774\ub098 \ud544\uc694\ud55c\uac00? \ub2e4 \uc774\uc720\uac00 \uc788\ub2e4. \ub098\ub97c \ubbff\uc5b4\ub77c. (\uae30\uc5b5\ud558\ub294\uac00? \uc2e0\ub8b0\uc640 \ubcf4\uc548\uc740 \ud568\uaed8 \ud55c\ub2e4\ub294 \uac83\uc744..) <\/P>\n<P>\uc6b0\uc120, <CODE>bio<\/CODE>\ub294 SSL \ucf58\ud14d\uc2a4\ud2b8\uc5d0\uc11c \uc0dd\uc131\ub420 \uba54\uc778 BIO \uac1d\uccb4\uc774\ub2e4. \ub450 \ubc88\uc9f8 \uac1d\uccb4\uc778 <CODE>abio<\/CODE>\ub294 accept BIO\ub85c\uc11c \uc778\ucee4\ubc0d \uc5f0\uacb0\uc744 \uc218\ub77d\ud55c\ub2e4. \uc138 \ubc88\uc9f8 BIO\uc778 <CODE>out<\/CODE>\uc744 \ud1b5\ud574 \uc11c\ubc84\uac00 \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \ud1b5\uc2e0\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N10250\" target=\"_blank\" rel=\"noopener\"><B>Listing 8. \uba54\uc778 BIO \uac1d\uccb4 \uc124\uc815\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>bio = BIO_new_ssl(ctx, 0);<br \/>if(bio == NULL)<br \/>{<br \/>    \/* Handle failure here *\/<br \/>}<br \/><br \/>\/* Here, ssl is an SSL* (see Part 1) *\/<br \/><br \/>BIO_get_ssl(bio, &amp;ssl);<br \/>SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>BIO \uac1d\uccb4 \uc124\uc815\uc740 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc5f0\uacb0\uc744 \uc124\uc815\ud558\ub294 \uac83\uacfc\ub294 \ub2e4\ub974\ub2e4. \ud074\ub77c\uc774\uc5b8\ud2b8 \uc5f0\uacb0\uc774 <CODE>BIO_new_ssl_connect<\/CODE>\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc124\uc815\ub418\ub294 \uac83\uc774\ub77c\ub294 \uac83\uc744 Part 1\uc5d0\uc11c \ubc30\uc6e0\ub2e4. <\/P>\n<P>\uc5ec\uae30\uc5d0\uc11c, \uc124\uc815\uc740 \ub450 \uac1c\uc758 \ub9e4\uac1c\ubcc0\uc218, SSL_CTX \uac1d\uccb4\uc5d0 \ub300\ud55c \ud3ec\uc778\ud130\uc640 \ud50c\ub798\uadf8\uc640 \ud568\uaed8 <CODE>BIO_new_ssl<\/CODE>\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc218\ud589\ub41c\ub2e4. \uc774 \ud50c\ub798\uadf8\ub294 OpenSSL\uc5d0\uac8c \uc5b4\ub5a4 \uc885\ub958\uc758 BIO \uac1d\uccb4\ub97c \uad6c\ud604\ud574\uc57c \ud558\ub294\uc9c0\ub97c \ub9d0\ud574\uc900\ub2e4. \uc11c\ubc84\uc758 \uacbd\uc6b0, 0, \ud074\ub77c\uc774\uc5b8\ud2b8\uc758 \uacbd\uc6b0 1\uc774\ub2e4. \uc774 \ucf54\ub4dc\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc5f0\uacb0\uc744 \uc124\uc815\ud558\ub294 \uac83\uc774\ubbc0\ub85c, \ud50c\ub798\uadf8\ub294 0\uc73c\ub85c \uc124\uc815\ub41c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N10267\" target=\"_blank\" rel=\"noopener\"><B>Listing 9. accept BIO \uc124\uc815\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>abio = BIO_new_accept(\"4422\");<br \/>BIO_set_accept_bios(abio, bio);<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P><CODE>BIO_do_connect<\/CODE>\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc5f0\uacb0\uc5d0 BIO\ub97c \uc0dd\uc131\ud558\ub294\ub370, <CODE>BIO_new_accept<\/CODE>\ub294 \uc11c\ubc84 \uc5f0\uacb0\uc6a9 BIO\ub97c \uc0dd\uc131\ud55c\ub2e4. \uc5ec\uae30\uc5d0\ub294 \ub2e8 \ud558\ub098\uc758 \uc778\uc790\ub9cc \ucde8\ud558\ub294\ub370, \ub9ac\uc2a4\ub2dd\uc6a9 \ud3ec\ud2b8\uc774\ub2e4. <\/P>\n<P>\uc774\uac83\uc740 \ubcf4\uc548 \uc5f0\uacb0\uc744 \ub9ac\uc2a4\ub2dd \ud560 \uac83\uc774\ubbc0\ub85c, \ubcf4\uc548 BIO\ub97c \uc774 accept BIO\ub85c \uc5f0\uacb0\uc2dc\ucf1c\uc57c \ud55c\ub2e4. \uc5ec\uae30\uc5d0\uc11c \ub450 \ubc88\uc9f8 \ud568\uc218 \ud638\ucd9c, <CODE>BIO_set_accept_bios<\/CODE>\uac00 \uc791\ub3d9\ud55c\ub2e4. \uc774\uac83\uc740 \uc774\uc804\uc5d0 \uc0dd\uc131\ub41c SSL BIO\ub97c accept BIO\ub85c \uc5f0\uacb0\ud55c\ub2e4. <\/P>\n<P>\uc774 \ud568\uc218\ub294 SSL BIO\ub97c \ud574\uc81c\ud560 \ud544\uc694\ub3c4 \uc5c6\uc564\ub2e4. accept BIO\uac00 \uc81c\uac70\ub418\uba74 \uc790\ub3d9\uc73c\ub85c \ud574\uc81c\ub41c\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N10285\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc549\uc544\uc11c \uae30\ub2e4\ub9ac\uae30<\/SPAN><\/A><\/P>\n<P>\uc11c\ubc84\ub294 \uc5b4\ubd80\uc640 \uac19\ub2e4. \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \ubb3c\ub9b4 \ub54c\uae4c\uc9c0 \uc549\uc544\uc11c \uae30\ub2e4\ub9b0\ub2e4. \uc11c\ubc84\ub294 \uadf8\uc800 \uc778\ucee4\ubc0d \uc5f0\uacb0\uc744 \uae30\ub2e4\ub9b4 \ubfd0\uc774\ub2e4. <\/P>\n<P>\uc5ec\ub7ec\ubd84\uc774 Winsock\uc774\ub098 BSD Sockets\ub97c \uc0ac\uc6a9\ud574\ubcf8 \uacbd\ud5d8\uc774 \uc788\ub2e4\uba74, <CODE>accept<\/CODE> \ud568\uc218\uc5d0 \ub300\ud574\uc11c\ub3c4 \uc54c \uac83\uc774\ub2e4. OpenSSL \uc0c1\ub300\uc790\ub294 <CODE>BIO_do_accept<\/CODE>\uc774\ub2e4. \uc5ec\uae30\uc5d0\uc11c\ub294 <CODE>accept<\/CODE>\ub97c \ud638\ucd9c\ud558\uba74 \ub418\uc5c8\uc9c0\ub9cc, \uc774 \uacbd\uc6b0\uc5d0\ub294 \uc549\uc544\uc11c \uae30\ub2e4\ub9ac\uae30 \uc804\uc5d0 <CODE>BIO_do_accept<\/CODE>\ub97c \ub450 \ubc88 \ud638\ucd9c\ud574\uc57c \ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N102A0\" target=\"_blank\" rel=\"noopener\"><B>Listing 10. \uc11c\ubc84\uc5d0\uac8c \uc549\uc744 \uac83\uc744(sit) \uba85\ub839\ud558\uae30 <\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>\/* First call to set up for accepting incoming connections... *\/<br \/><br \/>if(BIO_do_accept(abio) &lt;= 0)<br \/>{<br \/>    \/* Handle fail here *\/<br \/>}<br \/><br \/>\/* Second call to actually wait *\/<br \/><br \/>if(BIO_do_accept(abio) &lt;= 0)<br \/>{<br \/>    \/* Handle fail here *\/<br \/>}<br \/><br \/>\/* Any other call will cause it to wait automatically *\/<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P><CODE>BIO_do_accept<\/CODE>\uc5d0 \ub300\ud55c \uccab \ubc88\uc9f8 \ud638\ucd9c\uc740 BIO\uac00 \uc778\ucee4\ubc0d \uc5f0\uacb0\uc744 \uc218\ub77d\ud558\ub3c4\ub85d \uc124\uc815\ud55c\ub2e4. \ub450 \ubc88\uc9f8 \ud638\ucd9c\uc740 \uc2e4\uc81c\ub85c \uc774\uac83\uc774 \uc549\uc544\uc11c \uae30\ub2e4\ub9ac\ub3c4\ub85d \ud558\ub294\ub370 \ud544\uc694\ud558\ub2e4. \uc774\ud6c4\uc5d0\ub294 \uadf8\uc800 \uae30\ub2e4\ub9ac\uba74 \ub41c\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N102B0\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc778\ucee4\ubc0d \ud638\ucd9c\uc5d0 \uc751\ub2f5\ud558\uae30<\/SPAN><\/A><\/P>\n<P><CODE>BIO_do_accept<\/CODE>\ub294 \uc778\ucee4\ubc0d \uc5f0\uacb0\uc744 \ubc1b\uc73c\uba74 <CODE>1<\/CODE>\uc744 \ub9ac\ud134\ud55c\ub2e4. \ud558\uc9c0\ub9cc, accept BIO\ub97c \ud1b5\ud574\uc11c \ud1b5\uc2e0\ud560 \uc218 \uc5c6\ub2e4. \ub300\uc2e0, OpenSSL\uc740 <CODE>BIO_pop<\/CODE>\uc744 \uc0ac\uc6a9\ud558\uc5ec accept BIO\uc5d0 \ud544\uc801\ud558\ub294 \ub610 \ub2e4\ub978 BIO\ub97c \uc0dd\uc131\ud55c\ub2e4. <\/P><br \/><a class=\"con_link\" name=\"N102C4\" target=\"_blank\" rel=\"noopener\"><B>Listing 11. \uc5f0\uacb0\ud558\uae30<\/B><\/A><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD class=code-outline><PRE class=displaycode>out = BIO_pop(abio);<br \/><br \/>if(BIO_do_handshake(out) &lt;= 0)<br \/>{<br \/>    \/* Handle fail here *\/<br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>accept BIO\uc5d0\uc11c \uc778\ucee4\ubc0d \uc5f0\uacb0\uc744 \ud574\uc81c\ud55c \ud6c4\uc5d0, \ud578\ub4dc\uc250\uc774\ud06c\ub294 <CODE>BIO_do_handshake<\/CODE>\ub85c\uc758 \ud638\ucd9c\uc744 \uc0ac\uc6a9\ud558\uc5ec \ucc98\ub9ac\ub418\uc5b4\uc57c \ud55c\ub2e4. \uc774\uc804 \uc139\uc158\uc758 \uc124\uc815\uc774 \uc131\uacf5\ud588\ub2e4\uba74, \ud578\ub4dc\uc250\uc774\ud06c\ub3c4 \uc131\uacf5\ud560 \uac83\uc774\ub2e4.<\/P>\n<P>\uc11c\ubc84\ub294 BIO \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ub2e4\uc591\ud55c \uc77d\uae30 \ubc0f \uc4f0\uae30 \ud568\uc218\ub4e4\uc744 \ud1b5\ud574 \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \ud1b5\uc2e0\ud55c\ub2e4. \uc774 \ubd80\ubd84\uc740 <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\" cmimpressionsent=\"1\">Part 1<\/A>\uc5d0\uc11c \uc124\uba85\ud588\uc73c\ubbc0\ub85c \ucc38\uc870\ud558\uae30 \ubc14\ub780\ub2e4.<\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N102DB\" target=\"_blank\" _cssquery_UID=\"73\" rel=\"noopener\"><SPAN class=atitle>\ucd5c\uc0c1\uc758 \uc11c\ube44\uc2a4 \uc81c\uacf5\ud558\uae30<\/SPAN><\/A><\/P>\n<P>\uacb0\uad6d, OpenSSL\ub85c \ubcf4\uc548 \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\ub4e4\uc744 \uad6c\ud604\ud558\ub294 \uac83\uc740 \uc2e4\ud589 \ubc29\ubc95\uc744 \uc774\ud574\ud558\uae30\ub9cc \ud55c\ub2e4\uba74 \uc5b4\ub835\uc9c0 \uc54a\ub2e4. \uc774 \ucf54\ub4dc \uc0d8\ud50c\uc744 \ud655\uc7a5\ud558\uc5ec \uc644\ubcbd\ud55c SSL \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\ub4e4\uc744 \uc5ec\ub7ec\ubd84\uc758 \ud544\uc694\uc5d0 \ub9de\uac8c \uad6c\ud604\ud560 \uc218 \uc788\ub2e4. \ub2e4\uc2dc \ud55c\ubc88 \ub9d0\ud558\uc9c0\ub9cc, <A href=\"http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl3.html#downloads\" cmimpressionsent=\"1\">\ub2e4\uc6b4\ub85c\ub4dc \uc139\uc158<\/A>\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 \ucf54\ub4dc \uc0d8\ud50c\ub4e4\uc740 \ucd5c\ub300\ub85c \uac04\ub2e8\ud55c \uac83\uc774\uace0 \uc2e4\ud5d8\uc744 \ubaa9\uc801\uc73c\ub85c \ud55c \uac83\uc774\ub2e4. SSL \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\ub4e4\uc744 \uc2e4\uc81c\ub85c \uad6c\ud604\ud558\uae30 \uc804\uc5d0, \ucd5c\uc2e0 \ubcf4\uc548 \uad8c\uace0 \uc0ac\ud56d\uc744 \uc77d\uc5b4\ubcf4\uae30 \ubc14\ub780\ub2e4.<\/P><PRE class=displaycode><br \/>}<br \/><\/PRE><\/TD><\/TR><\/TBODY><\/TABLE><br \/>\n<P>\ud45c\uc900 C \uc2a4\ud2b8\ub9c1 \ud568\uc218 \ub610\ub294 \uac01\uc790 \uac1c\uc778\uc774 \uc120\ud638\ud558\ub294 \uc2a4\ud2b8\ub9c1 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec, \uacf5\ud1b5 \uc774\ub984\uacfc \ud638\uc2a4\ud2b8 \uc774\ub984\uc744 \ube44\uad50\ud55c\ub2e4. \ubbf8\uc2a4\ub9e4\uce58(mismatch)\ub97c \ub2e4\ub8e8\ub294 \ubc29\ubc95\uc740 \ud504\ub85c\uc81d\ud2b8\uc758 \uc694\uad6c \uc0ac\ud56d\uc774\ub098 \uc0ac\uc6a9\uc790\uc758 \uacb0\uc815\uc5d0 \ub2ec\ub824\uc788\ub2e4. \ub354 \uc2ec\ub3c4 \uae4a\uc740 \uccb4\ud06c\uac00 \uc0ac\uc6a9\ub418\uc5b4\uc57c \ud55c\ub2e4\uba74, \uac1c\ubcc4 \uc2a4\ud2b8\ub9c1 \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubcf5\uc7a1\ud568\uc744 \uc5c6\uc560\ub77c\uace0 \uad8c\uace0\ud558\uace0 \uc2f6\ub2e4. <\/P><br \/>\n<TABLE border=0 cellSpacing=0 cellPadding=0 width=\"100%\">\n<TBODY>\n<TR>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/v14\/rules\/blue_rule.gif\" width=100 height=1><\/TD><\/TR><\/TBODY><\/TABLE>\n<TABLE class=no-print cellSpacing=0 cellPadding=0 align=right>\n<TBODY>\n<TR align=right>\n<TD><IMG style=\"CURSOR: pointer\" onclick=\"popview(this, '90000003_000000000000000DFC143471')\" src=\"http:\/\/www.ibm.com\/i\/c.gif\" width=16 height=4><br \/><br \/><\/TD><\/TR><\/TBODY><\/TABLE><br \/><br \/>\n<P><a class=\"con_link\" name=\"N102DC\" target=\"_blank\" rel=\"noopener\"><SPAN class=atitle>\uc2e0\ub8b0 \uc5bb\uae30<\/SPAN><\/A><\/P>\n<P>\uc774 \uae00\uc744 \ud1b5\ud574 \uc2e0\ub8b0\ub97c \ubc1b\uc740 \uc18c\uc2a4\uc778 \uac83\ucc98\ub7fc \uac00\uc7a5\ud558\uc5ec \uce68\uc785\ud558\ub294 man in the middle \uacf5\uaca9\uc5d0 \ub300\ud558\uc5ec SSL \ud578\ub4dc\uc250\uc774\ud06c\ub97c \ubcf4\uc548\ud654 \ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud588\ub2e4. \ub610\ud55c \ub514\uc9c0\ud138 \uc778\uc99d\uc11c\uc758 \uac1c\ub150\uacfc OpenSSL API\uac00 \uc774\ub4e4\uc744 \ub2e4\ub8e8\ub294 \ubc29\ubc95\ub3c4 \uc124\uba85\ud588\ub2e4. <\/P>\n<P>SSL \uc138\uc158 \ub3d9\uc548 \ud578\ub4dc\uc250\uc774\ud06c\ub97c \ubcf4\uc548\ud654 \ud558\ub294 \uac83\uc740 \ub9e4\uc6b0 \uc911\uc694\ud558\ub2e4. \uc5f0\uacb0\uc5d0 \ud3ec\ud568\ub41c \uac70\uc758 \ubaa8\ub4e0 \ubcf4\uc548\ub4e4\uc774 \ud578\ub4dc\uc250\uc774\ud06c \ub0b4\uc5d0\uc11c \uc124\uc815\ub418\uae30 \ub54c\ubb38\uc774\ub2e4. \uc774 \uae00\uc5d0 \uc81c\uc2dc\ub41c \uac01 \ub2e8\uacc4\ub97c \ub530\ub77c\uac00\ub294 \uac83\uc740 \ud504\ub85c\uc81d\ud2b8\uc758 \ubcf4\uc548 \uc694\uad6c \uc0ac\ud56d \ubc0f \uac1c\ubc1c\uc790\uc758 \uacb0\uc815\uc5d0 \ub2ec\ub824\uc788\ub2e4. <br \/><\/P>\n<P><br \/><\/P>\n<P>\ucd9c\ucc98 : http:\/\/www.ibm.com\/developerworks\/kr\/library\/l-openssl.html\n","protected":false},"excerpt":{"rendered":"<p>\ubcf4\uc548 \ud1b5\uc2e0\uc6a9 \uc624\ud508 \ub77c\uc774\ube0c\ub7ec\ub9ac\uc778 OpenSSL\uc6a9 API\ub97c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6b4\ub2e4\ub294 \uac83\uc740 \ud798\ub4e0 \uc77c\uc785\ub2c8\ub2e4. \ubb38\uc11c\ud654\uac00 \uc544\uc9c1 \ub35c \ub418\uc5b4\uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774 \uae00\uc744 \ud1b5\ud574\uc11c \uc774\ub97c \uadf9\ubcf5\ud574 \ubd05\uc2dc\ub2e4. \uae30\ubcf8 \uc5f0\uacb0\uc744 \uc124\uc815\ud55c \ud6c4\uc5d0, OpenSSL\uc758 BIO \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubcf4\uc548\/\ube44\ubcf4\uc548 \uc5f0\uacb0\uc744 \uad6c\ucd95\ud558\ub294 \ubc29\ubc95\uc744 \ubc30\uc6cc\ubd05\uc2dc\ub2e4. \uc5d0\ub7ec \ud0d0\uc9c0\uc5d0 \ub300\ud55c \ubd80\ubd84\ub3c4 \uc124\uba85\ud569\ub2c8\ub2e4. OpenSSL API\uc640 \uad00\ub828\ud55c \ubb38\uc11c\ub294 \uc57d\uac04 \ubaa8\ud638\ud558\ub2e4. OpenSSL\uc758 \uc0ac\uc6a9\ubc95\uc5d0 \ub300\ud55c \ud29c\ud1a0\ub9ac\uc5bc\ub3c4 \ub9ce\uc9c0 \uc54a\uc73c\ubbc0\ub85c, \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc774\ub97c [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[19],"tags":[],"class_list":["post-138","post","type-post","status-publish","format-standard","hentry","category-development_lib"],"_links":{"self":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=138"}],"version-history":[{"count":0,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/138\/revisions"}],"wp:attachment":[{"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hasu0707.duckdns.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}