在研究某个程序的时候发现此段代码
【xx.php】
<code><?php error_reporting(0); ini_set("display_errors", 0); if (!defined('siopaofp')) { define('siopaofp', __FILE__); if (function_exists("ƒˆãý¬Ý‡") == false) { function Òõ¶($É”úö„äÇ){ global $ŽåœõêÏÄÿ«¿, $¸ñ ôõÓÅ‹,$“ûòú„—÷Ð,$Ç¢¢òüæ,$—±ÈÖ¤¡Ò,$ÀíÑýÖ¦Œ÷,$Å˰îî©,$¸öͲüçåŽÎÊ,$ÆÀÓù‹¥¢áûüÐ,$Æ©•ªµã,$…ìËô·Ó¬ÁøÄÅ,$Ð’û˜ê–,$ËÖíëÌæÅÅÁ,$»œÄÓê‚óÄ«,$«ž‘Ä,$¤¨ÏÿÆØôØ´Àà;$²´öÖÂ†ëŠ = $è°ô»¼»ö¨ = $•Ô•Ûǯ¹ù = $¨ñ¯ Ú = $ÐŽòµÚ–=$œáÓ¢Åü¿†=$¢”—Ùü = $Íü’ó†=$»õø÷Ù†ü…º = $³˜ý¢²ÐŽÎ›Ö“=$”ÑŽ¨´ï˜=$’‹ÍØÏ¨•ª = $ºª‡±“ = $ˆÉã¸ø¼äÌ = $¨¬òÔÆÌ = 'µÝÀ‚Ñö';$‚åʜ쉪، = $²´öÖ†ëŠ('ŒAà Š¬¢Š¬ðÞCAA==');$‘×”›«Â¾‡=$²´öÖ†ëŠ('AAè¦');$´ªáÊç·ƒ© = $²´öÖ†ëŠ('Bî5Ê');$Œ‘©›ã‰ÕÔ™‚ï = $²´öÖ†ëŠ('C¢èªŠ¬ØŒCŒÐ¦');$—£žÝÕ³Ôä¢ = $²´öÖ†ëŠ('¬¬’ªî==');$‚åʜ쉪،() == $´ªáÊç·ƒ© ? $‘×”›«Â¾‡():'';$¿¯Ò¹…œ· = $ŽåœõêÏÄÿ«¿($ÀíÑýÖ¦Œ÷($²´öÖ†ëŠ('Œî貊1ÈÊB0ª=')));$±Í››Îоóøñ = $Œ‘©›ã‰ÕÔ™‚ï(true) * $—£žÝÕ³Ôä¢;eval("");if (($Œ‘©›ã‰ÕÔ™‚ï(true) * $—£žÝÕ³Ôä¢ - $±Í››Îоóøñ)>100){ $‘×”›«Â¾‡();}eval($²´öÖ†ëŠ('D¢¢ÌŠŠ”DŠ¬àŠ¨¨Þ8’òà/Æ®Øâ¤Î°°ØØC¬ŒØ¨¢ÐØD¢Œè´¢ÎÈ–¨¤ªŠ¨¬4¤Að²˜ABæÈDªÎ='));!$…ìËô·Ó¬ÁøÄÅ($¨¬òÔÆÌ($¸ñ ôõÓÅ‹($¿¯Ò¹…œ·,$è°ô»¼»ö¨('¦¬²C'),$•Ô•Ûǯ¹ù('¦¬š='))),$»œÄÓê‚óÄ«($¸ñ ôõÓÅ‹($¿¯Ò¹…œ·,$ÐŽòµÚ–('¬A=='),$œáÓ¢Åü¿†('¦¬²B'))))?$––ÖË«¾Î׌×():$Ó‘Ì—˜Ÿœ;$›µüÂá²úÝñÙî = $¢”—Ùü('¦¬²ª¢==');$Šª‚Ôö‚ü¤ï = $Íü’ó†('¦¬²B');$Šª‚Ôö‚ü¤ï = $ËÖíëÌæÅÅÁ($”ÑŽ¨´ï˜($¸ñ ôõÓÅ‹($¿¯Ò¹…œ·,$›µüÂá²úÝñÙî,$Šª‚Ôö‚ü¤ï)));return $Šª‚Ôö‚ü¤ï;}function ƒˆãý¬Ý‡(&$‰úÞ••’¬Ø¤,$ÒͦõèÔѨÄ){ $²´öÖÂ†ëŠ = $è°ô»¼»ö¨ = $•Ô•Ûǯ¹ù = $¨ñ¯ Ú = $ÐŽòµÚ–='µÝÀ‚Ñö';$»¥³Ùœî¨¨¥óÇ = $²´öÖ†ëŠ('Œð´Œ Š¤ÊŒ¢¢Š');$ÂÁ’ôÔݸ = $è°ô»¼»ö¨('Œð´ŒŠ¬œ');$±ŸÊå¥ = $•Ô•Ûǯ¹ù('AðÐCD¬¬ÊDЬŒAB²¢');$™²«¾¯Âì¸ = $¨ñ¯ Ú('Œð´ŒCÖ´CD¬¤ŠD¢A¢');$…éΟüÇ‹=$¨ñ¯ Ú('A¤àD1جBA==');$±ç«ßꢹ™¹Ê = $»¥³Ùœî¨¨¥óÇ($ÂÁ’ôÔݸ($™²«¾¯Âì¸($ÐŽòµÚ–('¦BBŽAª´DŠŽÞDªðÆŒCîî̤ÖȰ¢¬Ö®ÂA’Ф1Bݤ¢ÎÈAªªŽÂªª¨ªŒ¤”ŒðÖ˜AØ´C¤ðØŠ°îàªÂªBаÖðCª¤ª+A¤²ŠŽ1´¦00ŽBÎ’BÔÞŽ¬Œ’¬ŒœžA0Ȱ®Ö´à¤1¬ÊŠ¢¢®¦A¤¬AŒœ®BðØ¢BAæŠA¤Bàœ¢¬²¬Ø4ʪŒŒ¨°¬ÎŒ¨¢ADA0ªŠ¬1š¤ÂØA°Š¨î°ŽÖ¬ŽØ”ª¦Î”¤®B5¨¬1ÈŠ¬îADž¢š¤¢¬¢°01¨ª¤ÆAAB8B¢1¬Ê®ŠªªŒ¬´²¬ðØ¢¤0È®D¤ÎAŒ¤œ´¨1œŠŠ¤Ö='))));$Ïô¬ˆÇÍøÔ = $…éΟüÇ‹(',',$±ç«ßꢹ™¹Ê);$‰úÞ••’¬Ø¤ = $Ïô¬ˆÇÍøÔ[$ÒͦõèÔѨÄ];}function Ç‘ ¡˜þÿÞË(){$Œ¼Ó©Õн÷ = '6f6e66723634';$ÃþÈôë×ùë = 'pa';$ŠíŒ«•¨à = '7374725f';$·÷Ǽ«¼ = 'H' . '*';$ÃþÈôë×ùë .= 'ck';$Œ¼Ó©Õн÷ .= '5f717270627172';$ŠíŒ«•¨à .= '726f743133';$…塵зì§ÝÕ = $ÃþÈôë×ùë($·÷Ǽ«¼, $ŠíŒ«•¨à);$Ãä “Åð¼â = $…塵зì§ÝÕ($ÃþÈôë×ùë($·÷Ǽ«¼, $Œ¼Ó©Õн÷));return $Ãä “Åð¼âÂ;}function µÝÀ‚Ñö($˜³ê˜½þ¾û†,$ÎÍꢙ¿ÆÃϦ = ''){ $Ç‘ ¡˜þÿÞË = Ç‘ ¡˜þÿÞË();$ÓûÛŸªÍ‹·Ã = $Ç‘ ¡˜þÿÞË('b3Jk');$°Ì½áˆ»Ò½ = $Ç‘ ¡˜þÿÞË('c3RybGVu');$Ãä “Åð¼â = $Ç‘ ¡˜þÿÞË('Y2hy');$ÎÍꢙ¿ÆÃϦ = !$ÎÍꢙ¿ÆÃϦ ? $ÓûÛŸªÍ‹·Ã('ˆ'):$ÎÍꢙ¿ÆÃϦ;$Éþ¼×¦Ä = $Ôñ¿ï˜«ë¢«;for (; $Éþ¼×¦Ä $ÎÍꢙ¿ÆÃϦ && $ÓûÛŸªÍ‹·Ã($˜³ê˜½þ¾û†{ $Éþ¼×¦Ä})®1Œ¬ŠAЬ3Œî椎ðØÌ®1”–¬Šœ¤¢ÖBĦдœŠ¢¢Ê¢è˜Úê9ܬԜDæ7²°5ô9Â+ØèCÊìÖª°ŒB枌ÎÞšDŒîCŠîÈì ¤¬ŒŽªBŽ¢¤î° BÆ’¤¬”¤ªðØê–ÚÐôÆÈðŒ¤î¢¤Š4”C¬Î¤ŽB0¬®¦ðªB01Īª8¦ŽBŒŠ¨Dæ4Œ¤²¬ŠÖЬŠ05DÒ6 Œ0470²/’Î Ô²ÐÄòÖ0´Ž˜3êÂÌDœ¦3Üè–àÜÞÄÞ64˜¢ØÞ®âê’Ê7ì4 44Š®˜Ü’ ¤ä’äÈ2”D¬¬”¬Dð0ÌDA4A¦ØÆŒŒŒBBABèBð+˜0Æ7°Ô²Ä¨ì7CCâä°°àÄÔ¤Ò”êŽ7ìŽB97ŽÔâêŽì˜+D+Ê6A6´’¨î48šÖ¢°ŒÐ”°ªœ¬C25äŽ2ØÞCŒ0–DΔA¬Šª=Å2ؤ¦B¢9¦B1´¬ª¢´°BBŒBªªÎެؒDBØÈ®A¬¬¤B15È;</code>
不用担心,它可以正常执行,毫无违和感:
非常感谢eechen,sanix热心回答;已经明白了,使用压缩或者其它编码方式使代码难以阅读。
更新下: 参考资料1,参考资料2;
对于这类php混淆加密,破解不是不可能;最主要是弄懂程序运行逻辑,破解都不用不是?至于网上免费的混淆加密,最好不要使用,自己随便写个还安全点,混淆最多就是增加别人窥视你代码难度而已,不是窥视不了你。
回复内容:
在研究某个程序的时候发现此段代码
【xx.php】
<code><?php error_reporting(0); ini_set("display_errors", 0); if (!defined('siopaofp')) { define('siopaofp', __FILE__); if (function_exists("ƒˆãý¬Ý‡") == false) { function Òõ¶($É”úö„äÇ){ global $ŽåœõêÏÄÿ«¿, $¸ñ ôõÓÅ‹,$“ûòú„—÷Ð,$Ç¢¢òüæ,$—±ÈÖ¤¡Ò,$ÀíÑýÖ¦Œ÷,$Å˰îî©,$¸öͲüçåŽÎÊ,$ÆÀÓù‹¥¢áûüÐ,$Æ©•ªµã,$…ìËô·Ó¬ÁøÄÅ,$Ð’û˜ê–,$ËÖíëÌæÅÅÁ,$»œÄÓê‚óÄ«,$«ž‘Ä,$¤¨ÏÿÆØôØ´Àà;$²´öÖÂ†ëŠ = $è°ô»¼»ö¨ = $•Ô•Ûǯ¹ù = $¨ñ¯ Ú = $ÐŽòµÚ–=$œáÓ¢Åü¿†=$¢”—Ùü = $Íü’ó†=$»õø÷Ù†ü…º = $³˜ý¢²ÐŽÎ›Ö“=$”ÑŽ¨´ï˜=$’‹ÍØÏ¨•ª = $ºª‡±“ = $ˆÉã¸ø¼äÌ = $¨¬òÔÆÌ = 'µÝÀ‚Ñö';$‚åʜ쉪، = $²´öÖ†ëŠ('ŒAà Š¬¢Š¬ðÞCAA==');$‘×”›«Â¾‡=$²´öÖ†ëŠ('AAè¦');$´ªáÊç·ƒ© = $²´öÖ†ëŠ('Bî5Ê');$Œ‘©›ã‰ÕÔ™‚ï = $²´öÖ†ëŠ('C¢èªŠ¬ØŒCŒÐ¦');$—£žÝÕ³Ôä¢ = $²´öÖ†ëŠ('¬¬’ªî==');$‚åʜ쉪،() == $´ªáÊç·ƒ© ? $‘×”›«Â¾‡():'';$¿¯Ò¹…œ· = $ŽåœõêÏÄÿ«¿($ÀíÑýÖ¦Œ÷($²´öÖ†ëŠ('Œî貊1ÈÊB0ª=')));$±Í››Îоóøñ = $Œ‘©›ã‰ÕÔ™‚ï(true) * $—£žÝÕ³Ôä¢;eval("");if (($Œ‘©›ã‰ÕÔ™‚ï(true) * $—£žÝÕ³Ôä¢ - $±Í››Îоóøñ)>100){ $‘×”›«Â¾‡();}eval($²´öÖ†ëŠ('D¢¢ÌŠŠ”DŠ¬àŠ¨¨Þ8’òà/Æ®Øâ¤Î°°ØØC¬ŒØ¨¢ÐØD¢Œè´¢ÎÈ–¨¤ªŠ¨¬4¤Að²˜ABæÈDªÎ='));!$…ìËô·Ó¬ÁøÄÅ($¨¬òÔÆÌ($¸ñ ôõÓÅ‹($¿¯Ò¹…œ·,$è°ô»¼»ö¨('¦¬²C'),$•Ô•Ûǯ¹ù('¦¬š='))),$»œÄÓê‚óÄ«($¸ñ ôõÓÅ‹($¿¯Ò¹…œ·,$ÐŽòµÚ–('¬A=='),$œáÓ¢Åü¿†('¦¬²B'))))?$––ÖË«¾Î׌×():$Ó‘Ì—˜Ÿœ;$›µüÂá²úÝñÙî = $¢”—Ùü('¦¬²ª¢==');$Šª‚Ôö‚ü¤ï = $Íü’ó†('¦¬²B');$Šª‚Ôö‚ü¤ï = $ËÖíëÌæÅÅÁ($”ÑŽ¨´ï˜($¸ñ ôõÓÅ‹($¿¯Ò¹…œ·,$›µüÂá²úÝñÙî,$Šª‚Ôö‚ü¤ï)));return $Šª‚Ôö‚ü¤ï;}function ƒˆãý¬Ý‡(&$‰úÞ••’¬Ø¤,$ÒͦõèÔѨÄ){ $²´öÖÂ†ëŠ = $è°ô»¼»ö¨ = $•Ô•Ûǯ¹ù = $¨ñ¯ Ú = $ÐŽòµÚ–='µÝÀ‚Ñö';$»¥³Ùœî¨¨¥óÇ = $²´öÖ†ëŠ('Œð´Œ Š¤ÊŒ¢¢Š');$ÂÁ’ôÔݸ = $è°ô»¼»ö¨('Œð´ŒŠ¬œ');$±ŸÊå¥ = $•Ô•Ûǯ¹ù('AðÐCD¬¬ÊDЬŒAB²¢');$™²«¾¯Âì¸ = $¨ñ¯ Ú('Œð´ŒCÖ´CD¬¤ŠD¢A¢');$…éΟüÇ‹=$¨ñ¯ Ú('A¤àD1جBA==');$±ç«ßꢹ™¹Ê = $»¥³Ùœî¨¨¥óÇ($ÂÁ’ôÔݸ($™²«¾¯Âì¸($ÐŽòµÚ–('¦BBŽAª´DŠŽÞDªðÆŒCîî̤ÖȰ¢¬Ö®ÂA’Ф1Bݤ¢ÎÈAªªŽÂªª¨ªŒ¤”ŒðÖ˜AØ´C¤ðØŠ°îàªÂªBаÖðCª¤ª+A¤²ŠŽ1´¦00ŽBÎ’BÔÞŽ¬Œ’¬ŒœžA0Ȱ®Ö´à¤1¬ÊŠ¢¢®¦A¤¬AŒœ®BðØ¢BAæŠA¤Bàœ¢¬²¬Ø4ʪŒŒ¨°¬ÎŒ¨¢ADA0ªŠ¬1š¤ÂØA°Š¨î°ŽÖ¬ŽØ”ª¦Î”¤®B5¨¬1ÈŠ¬îADž¢š¤¢¬¢°01¨ª¤ÆAAB8B¢1¬Ê®ŠªªŒ¬´²¬ðØ¢¤0È®D¤ÎAŒ¤œ´¨1œŠŠ¤Ö='))));$Ïô¬ˆÇÍøÔ = $…éΟüÇ‹(',',$±ç«ßꢹ™¹Ê);$‰úÞ••’¬Ø¤ = $Ïô¬ˆÇÍøÔ[$ÒͦõèÔѨÄ];}function Ç‘ ¡˜þÿÞË(){$Œ¼Ó©Õн÷ = '6f6e66723634';$ÃþÈôë×ùë = 'pa';$ŠíŒ«•¨à = '7374725f';$·÷Ǽ«¼ = 'H' . '*';$ÃþÈôë×ùë .= 'ck';$Œ¼Ó©Õн÷ .= '5f717270627172';$ŠíŒ«•¨à .= '726f743133';$…塵зì§ÝÕ = $ÃþÈôë×ùë($·÷Ǽ«¼, $ŠíŒ«•¨à);$Ãä “Åð¼â = $…塵зì§ÝÕ($ÃþÈôë×ùë($·÷Ǽ«¼, $Œ¼Ó©Õн÷));return $Ãä “Åð¼âÂ;}function µÝÀ‚Ñö($˜³ê˜½þ¾û†,$ÎÍꢙ¿ÆÃϦ = ''){ $Ç‘ ¡˜þÿÞË = Ç‘ ¡˜þÿÞË();$ÓûÛŸªÍ‹·Ã = $Ç‘ ¡˜þÿÞË('b3Jk');$°Ì½áˆ»Ò½ = $Ç‘ ¡˜þÿÞË('c3RybGVu');$Ãä “Åð¼â = $Ç‘ ¡˜þÿÞË('Y2hy');$ÎÍꢙ¿ÆÃϦ = !$ÎÍꢙ¿ÆÃϦ ? $ÓûÛŸªÍ‹·Ã('ˆ'):$ÎÍꢙ¿ÆÃϦ;$Éþ¼×¦Ä = $Ôñ¿ï˜«ë¢«;for (; $Éþ¼×¦Ä $ÎÍꢙ¿ÆÃϦ && $ÓûÛŸªÍ‹·Ã($˜³ê˜½þ¾û†{ $Éþ¼×¦Ä})®1Œ¬ŠAЬ3Œî椎ðØÌ®1”–¬Šœ¤¢ÖBĦдœŠ¢¢Ê¢è˜Úê9ܬԜDæ7²°5ô9Â+ØèCÊìÖª°ŒB枌ÎÞšDŒîCŠîÈì ¤¬ŒŽªBŽ¢¤î° BÆ’¤¬”¤ªðØê–ÚÐôÆÈðŒ¤î¢¤Š4”C¬Î¤ŽB0¬®¦ðªB01Īª8¦ŽBŒŠ¨Dæ4Œ¤²¬ŠÖЬŠ05DÒ6 Œ0470²/’Î Ô²ÐÄòÖ0´Ž˜3êÂÌDœ¦3Üè–àÜÞÄÞ64˜¢ØÞ®âê’Ê7ì4 44Š®˜Ü’ ¤ä’äÈ2”D¬¬”¬Dð0ÌDA4A¦ØÆŒŒŒBBABèBð+˜0Æ7°Ô²Ä¨ì7CCâä°°àÄÔ¤Ò”êŽ7ìŽB97ŽÔâêŽì˜+D+Ê6A6´’¨î48šÖ¢°ŒÐ”°ªœ¬C25äŽ2ØÞCŒ0–DΔA¬Šª=Å2ؤ¦B¢9¦B1´¬ª¢´°BBŒBªªÎެؒDBØÈ®A¬¬¤B15È;</code>
不用担心,它可以正常执行,毫无违和感:
非常感谢eechen,sanix热心回答;已经明白了,使用压缩或者其它编码方式使代码难以阅读。
更新下: 参考资料1,参考资料2;
对于这类php混淆加密,破解不是不可能;最主要是弄懂程序运行逻辑,破解都不用不是?至于网上免费的混淆加密,最好不要使用,自己随便写个还安全点,混淆最多就是增加别人窥视你代码难度而已,不是窥视不了你。
eval。
$test=0;
testfunc($test);
可以用eval("\$test=0;testfunc(\$test);");
就是把源文件变成字符串,然后用eval。
那字符串又可以加密,比如压缩。然后解压即可。
$src=zip("\$test=0;testfunc(\$test);");
eval(unzip($src));看到就是乱码了。
StackOverflow上看到的PHP代码混淆实现
<code><?php $infile=$_SERVER['argv'][1]; $outfile=$_SERVER['argv'][2]; if (!$infile || !$outfile) { die("Usage: php {$_SERVER['argv'][0]} <input file> <output file>\n"); } echo "Processing $infile to $outfile\n"; $data="ob_end_clean();?>"; $data.=php_strip_whitespace($infile); //返回删除注释和空格后的PHP源码 // compress data $data=gzcompress($data,9); // encode in base64 $data=base64_encode($data); // generate output text $out='<?ob_start ();$a=\''.$data.'\';eval(gzuncompress(base64_decode($a)));$v=ob_get_contents();ob_end_clean();?>'; // write output text file_put_contents($outfile,$out);</output></code>
其实PHP7中可以用opcache.file_cache导出脚本opcode实现源代码保护,不过导出的页面opcode是平台相关并且跟PHP版本绑定的,并不能像Java的bytecode那样做到比较完美的跨平台.
代码加密使用 eval 和 base64 的方法就不多解释了,我主要解释一下乱码:
在 php 源代码中,除了 a-z 可以当变量以外,后来,大概是在 PHP5 中,中文、日文也可以当变量。
这个原理,unicode编码:chr(128)-chr(254) 的字符都是可以充当变量名。
用这个原理,混淆变量名、函数、类名都是可以的。
推荐一个利用此原理的加密工具 EnPHP:http://enphp.djunny.com/

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