PHP 三重DES加密和兼容的C#解密
PHP Triple DES encryption and compatible C# decryption
我正在用 C# 解密消息,此消息在 PHP 中使用以下代码加密:-
public function __construct($sEncryptionKey)
{
$this->link = mcrypt_module_open('tripledes', '', 'ecb', '');
$this->sInitializationVector = mcrypt_create_iv(mcrypt_enc_get_iv_size($this->link), MCRYPT_RAND);
$this->iKeySize = mcrypt_enc_get_key_size($this->link);
$sEncryptionKey = substr(md5($sEncryptionKey), 0, $this->iKeySize);
mcrypt_generic_init($this->link, $sEncryptionKey, $this->sInitializationVector);
}
public function encrypt($sDataToEncrypt)
{
return base64_encode(mcrypt_generic($this->link, $sDataToEncrypt));
}
并且我在 c# 中使用以下解密函数进行解密:-
public string Decrypt(string toDecrypt, string key, bool useHashing)
{
byte[] keyArray;
byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
if (useHashing)
{
MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
hashmd5.Clear();
}
else
{
keyArray = UTF8Encoding.UTF8.GetBytes(key);
}
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
tdes.Key = keyArray;
tdes.Mode = CipherMode.ECB;
tdes.Padding = PaddingMode.Zeros;
ICryptoTransform cTransform = tdes.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
tdes.Clear();
var strValue = UTF8Encoding.UTF8.GetString(resultArray);
return UTF8Encoding.UTF8.GetString(resultArray);
}
我尝试了一些改动并得到了以下结果:-
1.) PaddingMode.PKCS7 没有散列 = "Specified key is not a valid size for this algorithm."
2.) PaddingMode.PKCS7 with hashing = "Bad Data."
3.) PaddingMode.Zeros 没有散列 = "Specified key is not a valid size for this algorithm."
4.) PaddingMode.Zeros 散列 = "�8�f���q6IGs�" 一些未知字符
我认为第 4 个可以,但不确定我做错了什么。
找到解决方案,需要更改 MD5 哈希,如果有人遇到相同情况,下面是完整代码:-
public string Decrypt(string toDecrypt, string key, bool useHashing)
{
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
byte[] keyArray;
byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
string keyArrayStr = "";
if (useHashing)
{
MD5 md5 = MD5CryptoServiceProvider.Create();
byte[] dataMd5 = md5.ComputeHash(Encoding.Default.GetBytes(key));
StringBuilder sb = new StringBuilder();
for (int i = 0; i < dataMd5.Length; i++)
sb.AppendFormat("{0:x2}", dataMd5[i]);
keyArrayStr = sb.ToString().Substring(0, tdes.Key.Length);
keyArray = UTF8Encoding.UTF8.GetBytes(keyArrayStr);
}
else
{
keyArray = UTF8Encoding.UTF8.GetBytes(key);
}
tdes.Key = keyArray;
tdes.Mode = CipherMode.ECB;
tdes.Padding = PaddingMode.Zeros;
ICryptoTransform cTransform = tdes.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
tdes.Clear();
var strValue = UTF8Encoding.UTF8.GetString(resultArray);
return UTF8Encoding.UTF8.GetString(resultArray);
}
我正在用 C# 解密消息,此消息在 PHP 中使用以下代码加密:-
public function __construct($sEncryptionKey)
{
$this->link = mcrypt_module_open('tripledes', '', 'ecb', '');
$this->sInitializationVector = mcrypt_create_iv(mcrypt_enc_get_iv_size($this->link), MCRYPT_RAND);
$this->iKeySize = mcrypt_enc_get_key_size($this->link);
$sEncryptionKey = substr(md5($sEncryptionKey), 0, $this->iKeySize);
mcrypt_generic_init($this->link, $sEncryptionKey, $this->sInitializationVector);
}
public function encrypt($sDataToEncrypt)
{
return base64_encode(mcrypt_generic($this->link, $sDataToEncrypt));
}
并且我在 c# 中使用以下解密函数进行解密:-
public string Decrypt(string toDecrypt, string key, bool useHashing)
{
byte[] keyArray;
byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
if (useHashing)
{
MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
hashmd5.Clear();
}
else
{
keyArray = UTF8Encoding.UTF8.GetBytes(key);
}
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
tdes.Key = keyArray;
tdes.Mode = CipherMode.ECB;
tdes.Padding = PaddingMode.Zeros;
ICryptoTransform cTransform = tdes.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
tdes.Clear();
var strValue = UTF8Encoding.UTF8.GetString(resultArray);
return UTF8Encoding.UTF8.GetString(resultArray);
}
我尝试了一些改动并得到了以下结果:-
1.) PaddingMode.PKCS7 没有散列 = "Specified key is not a valid size for this algorithm."
2.) PaddingMode.PKCS7 with hashing = "Bad Data."
3.) PaddingMode.Zeros 没有散列 = "Specified key is not a valid size for this algorithm."
4.) PaddingMode.Zeros 散列 = "�8�f���q6IGs�" 一些未知字符
我认为第 4 个可以,但不确定我做错了什么。
找到解决方案,需要更改 MD5 哈希,如果有人遇到相同情况,下面是完整代码:-
public string Decrypt(string toDecrypt, string key, bool useHashing)
{
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
byte[] keyArray;
byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
string keyArrayStr = "";
if (useHashing)
{
MD5 md5 = MD5CryptoServiceProvider.Create();
byte[] dataMd5 = md5.ComputeHash(Encoding.Default.GetBytes(key));
StringBuilder sb = new StringBuilder();
for (int i = 0; i < dataMd5.Length; i++)
sb.AppendFormat("{0:x2}", dataMd5[i]);
keyArrayStr = sb.ToString().Substring(0, tdes.Key.Length);
keyArray = UTF8Encoding.UTF8.GetBytes(keyArrayStr);
}
else
{
keyArray = UTF8Encoding.UTF8.GetBytes(key);
}
tdes.Key = keyArray;
tdes.Mode = CipherMode.ECB;
tdes.Padding = PaddingMode.Zeros;
ICryptoTransform cTransform = tdes.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
tdes.Clear();
var strValue = UTF8Encoding.UTF8.GetString(resultArray);
return UTF8Encoding.UTF8.GetString(resultArray);
}