php5.5des解密,使用php进行TRIPLEDES加密/解密

我在PHP中有这个TRIPLE DES ENCRYPTION CODE

$encryption_key &＃61; "CE51E06875F7D964";

$data&＃61;&＃39;tokenNo&＃61;test&securityCode&＃61;111&＃39; ;

echo $desEncryptedData &＃61; encryptText_3des($data, $encryption_key);//outputs 3des encrypted data

function encryptText_3des($plainText, $key) {

$key &＃61; hash("md5", $key, TRUE);

for ($x&＃61;0;$x<8;$x&＃43;&＃43;) {

$key &＃61; $key.substr($key, $x, 1);

}

$padded &＃61; pkcs5_pad($plainText,

mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_CBC));

$encrypted &＃61; base64_encode(mcrypt_encrypt(MCRYPT_3DES, $key, $padded, MCRYPT_MODE_CBC));

return $encrypted;

}

function pkcs5_pad ($text, $blocksize)

{

$pad &＃61; $blocksize - (strlen($text) % $blocksize);

return $text . str_repeat(chr($pad), $pad);

}

我能够将数据加密为xcFEvIdLXc2fjhG1i4iPOQu5L6ahxwZVucDOPqeMM2E &＃61;

现在我有了密钥,我能将这些数据解密为纯文本格式吗&＃xff1f;

我试过这种方式

$encryption_key &＃61; "CE51E06875F7D964";

$data&＃61;&＃39;xcFEvIdLXc2fjhG1i4iPOQu5L6ahxwZVucDOPqeMM2E&＃61;&＃39; ; //encrypted data

echo $desEncryptedData &＃61; encryptText_3des($data, $encryption_key);//outputs 3des encrypted data

function encryptText_3des($plainText, $key) {

$key &＃61; hash("md5", $key, TRUE);

for ($x&＃61;0;$x<8;$x&＃43;&＃43;) {

$key &＃61; $key.substr($key, $x, 1);

}

$padded &＃61; pkcs5_unpad($plainText,

mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_CBC));

$encrypted &＃61; base64_encode(mcrypt_encrypt(MCRYPT_3DES, $key, $padded, MCRYPT_MODE_CBC));

return $encrypted;

}

function pkcs5_unpad($text)

{

$pad &＃61; ord($text{strlen($text)-1});

if ($pad > strlen($text)) return false;

if (strspn($text, chr($pad), strlen($text) - $pad) !&＃61; $pad) return false;

return substr($text, 0, -1 * $pad);

}

但我无法做到.我正在做的事情是错的&＃xff1f;请建议我解密这个问题&＃xff1f;加密密钥本身是用来解密三重DES中的数据吗&＃xff1f;请帮忙

解决方法:

这是解决方案&＃xff1a;

public function encrypt($data, $secret)

{

//Generate a key from a hash

$key &＃61; md5(utf8_encode($secret), true);

//Take first 8 bytes of $key and append them to the end of $key.

$key .&＃61; substr($key, 0, 8);

//Pad for PKCS7

$blockSize &＃61; mcrypt_get_block_size(&＃39;tripledes&＃39;, &＃39;ecb&＃39;);

$len &＃61; strlen($data);

$pad &＃61; $blockSize - ($len % $blockSize);

$data .&＃61; str_repeat(chr($pad), $pad);

//Encrypt data

$encData &＃61; mcrypt_encrypt(&＃39;tripledes&＃39;, $key, $data, &＃39;ecb&＃39;);

return base64_encode($encData);

}

public function decrypt($data, $secret)

{

//Generate a key from a hash

$key &＃61; md5(utf8_encode($secret), true);

//Take first 8 bytes of $key and append them to the end of $key.

$key .&＃61; substr($key, 0, 8);

$data &＃61; base64_decode($data);

$data &＃61; mcrypt_decrypt(&＃39;tripledes&＃39;, $key, $data, &＃39;ecb&＃39;);

$block &＃61; mcrypt_get_block_size(&＃39;tripledes&＃39;, &＃39;ecb&＃39;);

$len &＃61; strlen($data);

$pad &＃61; ord($data[$len-1]);

return substr($data, 0, strlen($data) - $pad);

}

问候.

标签&＃xff1a;php,cryptography,encryption,tripledes

来源&＃xff1a; https://codeday.me/bug/20190717/1491254.html