代码演示如下:
方法一
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<?php function encryptDecrypt( $key , $string , $decrypt ){ if ( $decrypt ){ $decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5( $key ), base64_decode ( $string ), MCRYPT_MODE_CBC, md5(md5( $key ))), "12" ); return $decrypted ; } else { $encrypted = base64_encode (mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5( $key ), $string , MCRYPT_MODE_CBC, md5(md5( $key )))); return $encrypted ; } } //加密:"z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=" echo encryptDecrypt( 'password' , 'Helloweba欢迎您' ,0); //解密:"Helloweba欢迎您" echo encryptDecrypt( 'password' , 'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=' ,1); ?> |
方法二
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<?php //加密函数 function lock_url( $txt , $key = 'liiu' ){ $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+" ; $nh = rand(0,64); $ch = $chars [ $nh ]; $mdKey = md5( $key . $ch ); $mdKey = substr ( $mdKey , $nh %8, $nh %8+7); $txt = base64_encode ( $txt ); $tmp = '' ; $i =0; $j =0; $k = 0; for ( $i =0; $i < strlen ( $txt ); $i ++) { $k = $k == strlen ( $mdKey ) ? 0 : $k ; $j = ( $nh + strpos ( $chars , $txt [ $i ])+ord( $mdKey [ $k ++]))%64; $tmp .= $chars [ $j ]; } return urlencode( $ch . $tmp ); } //解密函数 function unlock_url( $txt , $key = 'liiu' ){ $txt = urldecode( $txt ); $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+" ; $ch = $txt [0]; $nh = strpos ( $chars , $ch ); $mdKey = md5( $key . $ch ); $mdKey = substr ( $mdKey , $nh %8, $nh %8+7); $txt = substr ( $txt ,1); $tmp = '' ; $i =0; $j =0; $k = 0; for ( $i =0; $i < strlen ( $txt ); $i ++) { $k = $k == strlen ( $mdKey ) ? 0 : $k ; $j = strpos ( $chars , $txt [ $i ])- $nh - ord( $mdKey [ $k ++]); while ( $j <0) $j +=64; $tmp .= $chars [ $j ]; } return base64_decode ( $tmp ); } ?> |
方法三
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<?php //改进后的算法 //加密函数 function lock_url( $txt , $key = 'str' ){ $txt = $txt . $key ; $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+" ; $nh = rand(0,64); $ch = $chars [ $nh ]; $mdKey = md5( $key . $ch ); $mdKey = substr ( $mdKey , $nh %8, $nh %8+7); $txt = base64_encode ( $txt ); $tmp = '' ; $i =0; $j =0; $k = 0; for ( $i =0; $i < strlen ( $txt ); $i ++) { $k = $k == strlen ( $mdKey ) ? 0 : $k ; $j = ( $nh + strpos ( $chars , $txt [ $i ])+ord( $mdKey [ $k ++]))%64; $tmp .= $chars [ $j ]; } return urlencode( base64_encode ( $ch . $tmp )); } //解密函数 function unlock_url( $txt , $key = 'str' ){ $txt = base64_decode (urldecode( $txt )); $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+" ; $ch = $txt [0]; $nh = strpos ( $chars , $ch ); $mdKey = md5( $key . $ch ); $mdKey = substr ( $mdKey , $nh %8, $nh %8+7); $txt = substr ( $txt ,1); $tmp = '' ; $i =0; $j =0; $k = 0; for ( $i =0; $i < strlen ( $txt ); $i ++) { $k = $k == strlen ( $mdKey ) ? 0 : $k ; $j = strpos ( $chars , $txt [ $i ])- $nh - ord( $mdKey [ $k ++]); while ( $j <0) $j +=64; $tmp .= $chars [ $j ]; } return trim( base64_decode ( $tmp ), $key ); } ?> |
方法四
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<?php function passport_encrypt( $txt , $key = 'liiu' ) { srand((double)microtime() * 1000000); $encrypt_key = md5(rand(0, 32000)); $ctr = 0; $tmp = '' ; for ( $i = 0; $i < strlen ( $txt ); $i ++) { $ctr = $ctr == strlen ( $encrypt_key ) ? 0 : $ctr ; $tmp .= $encrypt_key [ $ctr ].( $txt [ $i ] ^ $encrypt_key [ $ctr ++]); } return urlencode( base64_encode (passport_key( $tmp , $key ))); } function passport_decrypt( $txt , $key = 'liiu' ) { $txt = passport_key( base64_decode (urldecode( $txt )), $key ); $tmp = '' ; for ( $i = 0; $i < strlen ( $txt ); $i ++) { $md5 = $txt [ $i ]; $tmp .= $txt [++ $i ] ^ $md5 ; } return $tmp ; } function passport_key( $txt , $encrypt_key ) { $encrypt_key = md5( $encrypt_key ); $ctr = 0; $tmp = '' ; for ( $i = 0; $i < strlen ( $txt ); $i ++) { $ctr = $ctr == strlen ( $encrypt_key ) ? 0 : $ctr ; $tmp .= $txt [ $i ] ^ $encrypt_key [ $ctr ++]; } return $tmp ; } $txt = "1" ; $key = "testkey" ; $encrypt = passport_encrypt( $txt , $key ); $decrypt = passport_decrypt( $encrypt , $key ); echo $encrypt . "<br>" ; echo $decrypt . "<br>" ; ?> |
方法五
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<?php //非常给力的authcode加密函数,Discuz!经典代码(带详解) //函数authcode($string, $operation, $key, $expiry)中的$string:字符串,明文或密文;$operation:DECODE表示解密,其它表示加密;$key:密匙;$expiry:密文有效期。 function authcode( $string , $operation = 'DECODE' , $key = '' , $expiry = 0) { // 动态密匙长度,相同的明文会生成不同密文就是依靠动态密匙 $ckey_length = 4; // 密匙 $key = md5( $key ? $key : $GLOBALS [ 'discuz_auth_key' ]); // 密匙a会参与加解密 $keya = md5( substr ( $key , 0, 16)); // 密匙b会用来做数据完整性验证 $keyb = md5( substr ( $key , 16, 16)); // 密匙c用于变化生成的密文 $keyc = $ckey_length ? ( $operation == 'DECODE' ? substr ( $string , 0, $ckey_length ): substr (md5(microtime()), - $ckey_length )) : '' ; // 参与运算的密匙 $cryptkey = $keya .md5( $keya . $keyc ); $key_length = strlen ( $cryptkey ); // 明文,前10位用来保存时间戳,解密时验证数据有效性,10到26位用来保存$keyb(密匙b), //解密时会通过这个密匙验证数据完整性 // 如果是解码的话,会从第$ckey_length位开始,因为密文前$ckey_length位保存 动态密匙,以保证解密正确 $string = $operation == 'DECODE' ? base64_decode ( substr ( $string , $ckey_length )) : sprintf( '%010d' , $expiry ? $expiry + time() : 0). substr (md5( $string . $keyb ), 0, 16). $string ; $string_length = strlen ( $string ); $result = '' ; $box = range(0, 255); $rndkey = array (); // 产生密匙簿 for ( $i = 0; $i <= 255; $i ++) { $rndkey [ $i ] = ord( $cryptkey [ $i % $key_length ]); } // 用固定的算法,打乱密匙簿,增加随机性,好像很复杂,实际上对并不会增加密文的强度 for ( $j = $i = 0; $i < 256; $i ++) { $j = ( $j + $box [ $i ] + $rndkey [ $i ]) % 256; $tmp = $box [ $i ]; $box [ $i ] = $box [ $j ]; $box [ $j ] = $tmp ; } // 核心加解密部分 for ( $a = $j = $i = 0; $i < $string_length ; $i ++) { $a = ( $a + 1) % 256; $j = ( $j + $box [ $a ]) % 256; $tmp = $box [ $a ]; $box [ $a ] = $box [ $j ]; $box [ $j ] = $tmp ; // 从密匙簿得出密匙进行异或,再转成字符 $result .= chr (ord( $string [ $i ]) ^ ( $box [( $box [ $a ] + $box [ $j ]) % 256])); } if ( $operation == 'DECODE' ) { // 验证数据有效性,请看未加密明文的格式 if (( substr ( $result , 0, 10) == 0 || substr ( $result , 0, 10) - time() > 0) && substr ( $result , 10, 16) == substr (md5( substr ( $result , 26). $keyb ), 0, 16)) { return substr ( $result , 26); } else { return '' ; } } else { // 把动态密匙保存在密文里,这也是为什么同样的明文,生产不同密文后能解密的原因 // 因为加密后的密文可能是一些特殊字符,复制过程可能会丢失,所以用base64编码 return $keyc . str_replace ( '=' , '' , base64_encode ( $result )); } } $str = 'abcdef' ; $key = 'www.helloweba.com' ; echo authcode( $str , 'ENCODE' , $key ,0); //加密 $str = '56f4yER1DI2WTzWMqsfPpS9hwyoJnFP2MpC8SOhRrxO7BOk' ; echo authcode( $str , 'DECODE' , $key ,0); //解密 ?> |
方法六
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<?php //函数encrypt($string,$operation,$key)中$string:需要加密解密的字符串;$operation:判断是加密还是解密,E表示加密,D表示解密;$key:密匙。 function encrypt( $string , $operation , $key = '' ){ $key =md5( $key ); $key_length = strlen ( $key ); $string = $operation == 'D' ? base64_decode ( $string ): substr (md5( $string . $key ),0,8). $string ; $string_length = strlen ( $string ); $rndkey = $box = array (); $result = '' ; for ( $i =0; $i <=255; $i ++){ $rndkey [ $i ]=ord( $key [ $i % $key_length ]); $box [ $i ]= $i ; } for ( $j = $i =0; $i <256; $i ++){ $j =( $j + $box [ $i ]+ $rndkey [ $i ])%256; $tmp = $box [ $i ]; $box [ $i ]= $box [ $j ]; $box [ $j ]= $tmp ; } for ( $a = $j = $i =0; $i < $string_length ; $i ++){ $a =( $a +1)%256; $j =( $j + $box [ $a ])%256; $tmp = $box [ $a ]; $box [ $a ]= $box [ $j ]; $box [ $j ]= $tmp ; $result .= chr (ord( $string [ $i ])^( $box [( $box [ $a ]+ $box [ $j ])%256])); } if ( $operation == 'D' ){ if ( substr ( $result ,0,8)== substr (md5( substr ( $result ,8). $key ),0,8)){ return substr ( $result ,8); } else { return '' ; } } else { return str_replace ( '=' , '' , base64_encode ( $result )); } } $str = 'abc' ; $key = 'www.helloweba.com' ; $token = encrypt( $str , 'E' , $key ); echo '加密:' .encrypt( $str , 'E' , $key ); echo '解密:' .encrypt( $str , 'D' , $key ); ?> |
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原文链接:https://blog.csdn.net/liuxingjiaoyuC/article/details/109381956