今天逛论坛看到一篇关于PHP字符串加密,很有参考价值,现在记录下来分享给大家,可以参考一下,增加了数据的安全性,避免相同字符多次加密得到结果是一致的,可以设置密文有效期,使用方法将Mcrypt.class.php放入您项目中类文件中,然后在你需要用到的地方通过 require 的方式引入,如需引用次数比较多的情况下可在父级控制器引用。
//加密 function ya_encrypt($data){ if ($data== null || empty($data)) { return $data; } $key = "yaibk568";//密钥 只能是8位字符串 $result= openssl_encrypt( $data, "DES-ECB", $key, 0); //return bin2hex($result); return $result; } //解密 function ya_decode($data){ if ($data== null || empty($data)) { return $data; } $key = "yaibk568"; $result= openssl_decrypt( $data, "DES-ECB", $key, 0); return $result; }
加密方式:Mcrypt::encode($Str, $n); 解密方式: Mcrypt::decode($Str, $n); $Str 必须 需要加解密的字符串 $n 非必须 密文有效期,单位s,0 为永久有效,
require("class.php") ; $code = Mcrypt::encode('sajkfcasjcla','7580'); echo "code-".$code; $code_ans = Mcrypt::decode("$code",'7580'); echo "answer-".$code_ans;
class.php
/* * 字符串加解密类; * 一次一密;且定时解密有效 * 可用于加密&动态key生成 */ class Mcrypt{ public $default_key = 'a!takA:dlmcldEv,e'; /** * 字符加密,一次一密,可定时解密有效 * @param string $string 原文 * @param string $key 密钥 * @param int $expiry 密文有效期,单位s,0 为永久有效 * @return string 加密后的内容 */ public static function encode($string,$key = '', $expiry = 0){ $ckeyLength = 4; $key = md5($key ? $key : $this->default_key); //解密密匙 $keya = md5(substr($key, 0, 16)); //做数据完整性验证 $keyb = md5(substr($key, 16, 16)); //用于变化生成的密文 (初始化向量IV) $keyc = substr(md5(microtime()), - $ckeyLength); $cryptkey = $keya . md5($keya . $keyc); $keyLength = strlen($cryptkey); $string = sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string . $keyb), 0, 16) . $string; $stringLength = strlen($string); $rndkey = array(); for($i = 0; $i <= 255; $i++) { $rndkey[$i] = ord($cryptkey[$i % $keyLength]); } $box = range(0, 255); // 打乱密匙簿,增加随机性 for($j = $i = 0; $i < 256; $i++) { $j = ($j + $box[$i] + $rndkey[$i]) % 256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } // 加解密,从密匙簿得出密匙进行异或,再转成字符 $result = ''; for($a = $j = $i = 0; $i < $stringLength; $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])); } $result = $keyc . str_replace('=', '', base64_encode($result)); $result = str_replace(array('+', '/', '='),array('-', '_', '.'), $result); return $result; } /** * 字符解密,一次一密,可定时解密有效 * @param string $string 密文 * @param string $key 解密密钥 * @return string 解密后的内容 */ public static function decode($string,$key = '') { $string = str_replace(array('-', '_', '.'),array('+', '/', '='), $string); $ckeyLength = 4; $key = md5($key ? $key : $this->default_key); //解密密匙 $keya = md5(substr($key, 0, 16)); //做数据完整性验证 $keyb = md5(substr($key, 16, 16)); //用于变化生成的密文 (初始化向量IV) $keyc = substr($string, 0, $ckeyLength); $cryptkey = $keya . md5($keya . $keyc); $keyLength = strlen($cryptkey); $string = base64_decode(substr($string, $ckeyLength)); $stringLength = strlen($string); $rndkey = array(); for($i = 0; $i <= 255; $i++) { $rndkey[$i] = ord($cryptkey[$i % $keyLength]); } $box = range(0, 255); // 打乱密匙簿,增加随机性 for($j = $i = 0; $i < 256; $i++) { $j = ($j + $box[$i] + $rndkey[$i]) % 256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } // 加解密,从密匙簿得出密匙进行异或,再转成字符 $result = ''; for($a = $j = $i = 0; $i < $stringLength; $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 ((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 ''; } } }
/** * 字符加密,一次一密,可定时解密有效 * * @param string $string 原文 * @param string $key 密钥 * @param int $expiry 密文有效期,单位s,0 为永久有效 * @return string 加密后的内容 */ $string='123456'; $c=encode($string,$key= '', $expiry = 0); print_r($c); echo "\n\n"; print_r(decode($c)); function encode($string,$key = '', $expiry = 0){ $ckeyLength = 4; $key = md5($key ? $key : '12456'); //解密密匙 $keya = md5(substr($key, 0, 16)); //做数据完整性验证 $keyb = md5(substr($key, 16, 16)); //用于变化生成的密文 (初始化向量IV) $keyc = substr(md5(microtime()), - $ckeyLength); $cryptkey = $keya . md5($keya . $keyc); $keyLength = strlen($cryptkey); $string = sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string . $keyb), 0, 16) . $string; $stringLength = strlen($string); $rndkey = array(); for($i = 0; $i <= 255; $i++) { $rndkey[$i] = ord($cryptkey[$i % $keyLength]); } $box = range(0, 255); // 打乱密匙簿,增加随机性 for($j = $i = 0; $i < 256; $i++) { $j = ($j + $box[$i] + $rndkey[$i]) % 256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } // 加解密,从密匙簿得出密匙进行异或,再转成字符 $result = ''; for($a = $j = $i = 0; $i < $stringLength; $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])); } $result = $keyc . str_replace('=', '', base64_encode($result)); $result = str_replace(array('+', '/', '='),array('-', '_', '.'), $result); return $result; }/** * 字符解密,一次一密,可定时解密有效 * * @param string $string 密文 * @param string $key 解密密钥 * @return string 解密后的内容 */ function decode($string,$key = ''){ $string = str_replace(array('-', '_', '.'),array('+', '/', '='), $string); $ckeyLength = 4; $key = md5($key ? $key : '12456'); //解密密匙 $keya = md5(substr($key, 0, 16)); //做数据完整性验证 $keyb = md5(substr($key, 16, 16)); //用于变化生成的密文 (初始化向量IV) $keyc = substr($string, 0, $ckeyLength); $cryptkey = $keya . md5($keya . $keyc); $keyLength = strlen($cryptkey); $string = base64_decode(substr($string, $ckeyLength)); $stringLength = strlen($string); $rndkey = array(); for($i = 0; $i <= 255; $i++) { $rndkey[$i] = ord($cryptkey[$i % $keyLength]); } $box = range(0, 255); // 打乱密匙簿,增加随机性 for($j = $i = 0; $i < 256; $i++) { $j = ($j + $box[$i] + $rndkey[$i]) % 256; $tmp = $box[$i]; $box[$i] = $box[$j]; $box[$j] = $tmp; } // 加解密,从密匙簿得出密匙进行异或,再转成字符 $result = ''; for($a = $j = $i = 0; $i < $stringLength; $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 ((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 ''; } }