/** * * 加密函数 * 算法：des * 加密模式：ecb * 补齐方法：pkcs5 * * @param unknown_type $input */function encryptdesecbpkcs5($input, $key) { $size = mcrypt_get_block_size('des', 'ecb'); $input = pkcs5_pad($input, $size); $td = mcrypt_module_open('des', '', 'ecb', ''); //$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), mcrypt_rand); $iv = 0; mcrypt_generic_init($td, $key, $iv); $data = mdecrypt_generic ($td, $input); mcrypt_generic_deinit($td); mcrypt_module_close($td); //$data = base64_encode($data); return $data; } /** * 解密函数 * 算法：des * 加密模式：ecb * 补齐方法：pkcs5 * @param unknown_type $input */function decryptdesecbpkcs5($input, $key) { $size = mcrypt_get_block_size('des', 'ecb'); $td = mcrypt_module_open('des', '', 'ecb', ''); $iv = 0; mcrypt_generic_init($td, $key, $iv); $data = mcrypt_generic($td, $input); mcrypt_generic_deinit($td); mcrypt_module_close($td); $data = pkcs5_unpad($data, $size); //$data = base64_encode($data); return $data; } function pkcs5_pad ($text, $blocksize) { $pad = $blocksize - (strlen($text) % $blocksize); return $text . str_repeat(chr($pad), $pad); } function pkcs5_unpad($text) { $pad = ord($text{strlen($text) - 1}); if ($pad > strlen($text)) return false; if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false; return substr($text, 0, -1 * $pad); } $str = 'test crypt';$key = 'jack11';$res = encryptdesecbpkcs5($str, $key);echo $res\n;$deres = decryptdesecbpkcs5($res, $key);echo \n$deres\n;
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php的ｄｅｓ加密的补齐比较特殊，而且不能指定
http://www.herongyang.com/cryptography/des-php-block-padding-in-mcrypt.html