问题描述
我在 PHP 中有这个 TRIPLE DES 加密代码
I have this TRIPLE DES ENCRYPTION CODE IN PHP
$encryption_key = "CE51E06875F7D964"; $data='tokenNo=test&securityCode=111' ; echo $desEncryptedData = encryptText_3des($data, $encryption_key);//outputs 3des encrypted data function encryptText_3des($plainText, $key) { $key = hash("md5", $key, TRUE); for ($x=0;$x<8;$x++) { $key = $key.substr($key, $x, 1); } $padded = pkcs5_pad($plainText, mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_CBC)); $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_3DES, $key, $padded, MCRYPT_MODE_CBC)); return $encrypted; } function pkcs5_pad ($text, $blocksize) { $pad = $blocksize - (strlen($text) % $blocksize); return $text . str_repeat(chr($pad), $pad); }
我可以将数据加密为 xcFEvIdLXc2fjhG1i4iPOQu5L6ahxwZVucDOPqeMM2E=
现在我有了密钥,我可以将这些数据解密为纯文本格式吗?
Now I have the key,will I able to decrypt this data to plain text format?
我是这样试的
$encryption_key = "CE51E06875F7D964"; $data='xcFEvIdLXc2fjhG1i4iPOQu5L6ahxwZVucDOPqeMM2E=' ; //encrypted data echo $desEncryptedData = encryptText_3des($data, $encryption_key);//outputs 3des encrypted data function encryptText_3des($plainText, $key) { $key = hash("md5", $key, TRUE); for ($x=0;$x<8;$x++) { $key = $key.substr($key, $x, 1); } $padded = pkcs5_unpad($plainText, mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_CBC)); $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_3DES, $key, $padded, MCRYPT_MODE_CBC)); return $encrypted; } function pkcs5_unpad($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 * $pad); }
但是我做不到.是我做的不对吗?请给我建议一种解密方法?加密密钥本身是否用于解密三重DES中的数据?请帮助
But I couldnt do it.IS what I am doing is wrong?Please suggest me a way to decrypt this?Is the encryption key itself is used to decrypt the data in triple DES?Please help
推荐答案
这是解决方案:
public function encrypt($data, $secret) { //Generate a key from a hash $key = md5(utf8_encode($secret), true); //Take first 8 bytes of $key and append them to the end of $key. $key .= substr($key, 0, 8); //Pad for PKCS7 $blockSize = mcrypt_get_block_size('tripledes', 'ecb'); $len = strlen($data); $pad = $blockSize - ($len % $blockSize); $data .= str_repeat(chr($pad), $pad); //Encrypt data $encData = mcrypt_encrypt('tripledes', $key, $data, 'ecb'); return base64_encode($encData); } public function decrypt($data, $secret) { //Generate a key from a hash $key = md5(utf8_encode($secret), true); //Take first 8 bytes of $key and append them to the end of $key. $key .= substr($key, 0, 8); $data = base64_decode($data); $data = mcrypt_decrypt('tripledes', $key, $data, 'ecb'); $block = mcrypt_get_block_size('tripledes', 'ecb'); $len = strlen($data); $pad = ord($data[$len-1]); return substr($data, 0, strlen($data) - $pad); }
问候.