闲者博客 - 加密 https://bk1314.com/tag/%E5%8A%A0%E5%AF%86/ zh-CN Fri, 25 Feb 2022 18:51:00 +0800 Fri, 25 Feb 2022 18:51:00 +0800 PHP加密解密的另类 https://bk1314.com/38.html https://bk1314.com/38.html Fri, 25 Feb 2022 18:51:00 +0800 飞鱼 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 $encrypted; } } //加密: echo encryptDecrypt('password', 'Helloweba欢迎您',0); //解密: echo encryptDecrypt('password', 'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=',1); ]]> 0 https://bk1314.com/38.html#comments https://bk1314.com/feed/tag/%E5%8A%A0%E5%AF%86/ 分享一段PHP加密解密的代码 https://bk1314.com/35.html https://bk1314.com/35.html Fri, 25 Feb 2022 18:46:25 +0800 飞鱼 //url base64编码 function urlsafe_b64encode($string) { $data = base64_encode($string); $data = str_replace(array('+','/','='),array('-','_',''),$data); return $data; } //url base64解码 function urlsafe_b64decode($string) { $data = str_replace(array('-','_'),array('+','/'),$string); $mod4 = strlen($data) % 4; if ($mod4) { $data .= substr('====', $mod4); } return base64_decode($data); } /* $string: 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 = 3600) { $ckey_length = 4; // 随机密钥长度 取值 0-32; // 加入随机密钥,可以令密文无任何规律,即便是原文和密钥完全相同,加密结果也会每次不同,增大破解难度。 // 取值越大,密文变动规律越大,密文变化 = 16 的 $ckey_length 次方 // 当此值为 0 时,则不产生随机密钥 $key = md5($key ? $key : 'default_key'); //这里可以填写默认key值 $keya = md5(substr($key, 0, 16)); $keyb = md5(substr($key, 16, 16)); $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : ''; $cryptkey = $keya.md5($keya.$keyc); $key_length = strlen($cryptkey); $string = $operation == 'DECODE' ? urlsafe_b64decode(substr($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); $rndkey = array(); for($i = 0; $i <= 255; $i++) { $rndkey[$i] = ord($cryptkey[$i % $key_length]); } for($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($operation == 'DECODE') { if((substr($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 { return $keyc.str_replace('=', '', urlsafe_b64encode($result)); } }
//使用方式
$key="F6FC05CA274E21DA3136F8C54336C0A8";
$str="我是加密字符串";
$time=10;
echo authcode($str, 'ENCODE', $key,$time);//$time是多少秒过期可以为空不过期
echo  authcode(urldecode($str), 'DECODE', $key);//字符串解密

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