[英]Mcrypt and base64 with PHP and c#
我已经在两个平台上编写了相同的方法,我认为这些方法应该会产生相同的结果,但它并没有发生。 我用相同的密钥加密了相同的文本,结果不同。 有人能弄明白为什么会这样吗?
字符串: 这是测试
密钥: 1234567812345678
PHP加密字符串: ybUaKwQlRNwOjJhxLWtLYQ ==
C#加密字符串: r2YjEFPyDDacnPmDFcGTLA ==
C#功能
static string Encrypt(string plainText, string key)
{
string cipherText;
var rijndael = new RijndaelManaged()
{
Key = Encoding.UTF8.GetBytes(key),
Mode = CipherMode.ECB,
BlockSize = 128,
};
ICryptoTransform encryptor = rijndael.CreateEncryptor(rijndael.Key, rijndael.IV);
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
using (var streamWriter = new StreamWriter(cryptoStream))
{
streamWriter.Write(plainText);
streamWriter.Flush();
}
cipherText = Convert.ToBase64String(memoryStream.ToArray());
//cryptoStream.FlushFinalBlock();
}
}
return cipherText;
}
private static string Decrypt(string cipherText, string key)
{
string plainText;
byte[] cipherArray = Convert.FromBase64String(cipherText);
var rijndael = new RijndaelManaged()
{
Key = Encoding.UTF8.GetBytes(key),
Mode = CipherMode.ECB,
BlockSize = 128
};
ICryptoTransform decryptor = rijndael.CreateDecryptor(rijndael.Key, rijndael.IV);
using (var memoryStream = new MemoryStream(cipherArray))
{
using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
using (var streamReader = new StreamReader(cryptoStream))
{
plainText = streamReader.ReadToEnd();
}
}
}
return plainText;
}
PHP函数
function string_encrypt($string, $key) {
$crypted_text = mcrypt_encrypt(
MCRYPT_RIJNDAEL_128,
$key,
$string,
MCRYPT_MODE_ECB
);
return base64_encode($crypted_text);
}
function string_decrypt($encrypted_string, $key) {
return mcrypt_decrypt(
MCRYPT_RIJNDAEL_128,
$key,
base64_decode($encrypted_string),
MCRYPT_MODE_ECB
);
}
我在C#中不是很好,我知道PHP函数运行正常。 所以,必须在C#函数上做一些事情。 可能是要加密的字符串应转换为拉丁字符。
C#默认使用Rijndael填充并使用PKCS7。
这意味着你必须根据PKCS7填充你的PHP端,下面的代码应该工作:
function string_encrypt($string, $key) {
$block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$padding = $block - (strlen($string) % $block);
$string .= str_repeat(chr($padding), $padding);
$crypted_text = mcrypt_encrypt(
MCRYPT_RIJNDAEL_128,
$key,
$string,
MCRYPT_MODE_ECB
);
return base64_encode($crypted_text);
}
我还应该补充一点,如果你想改变C#方面而不是使用填充,请改为进行以下修改并留下PHP方面:
static string Encrypt(string plainText, string key)
{
string cipherText;
var rijndael = new RijndaelManaged()
{
Key = Encoding.UTF8.GetBytes(key),
Mode = CipherMode.ECB,
BlockSize = 128,
Padding = PaddingMode.Zeros,
};
ICryptoTransform encryptor = rijndael.CreateEncryptor(rijndael.Key, null);
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
using (var streamWriter = new StreamWriter(cryptoStream))
{
streamWriter.Write(plainText);
streamWriter.Flush();
}
//cipherText = Convert.ToBase64String(Encoding.UTF8.GetBytes(Encoding.UTF8.GetString(memoryStream.ToArray())));
cipherText = Convert.ToBase64String(memoryStream.ToArray());
//cryptoStream.FlushFinalBlock();
}
}
return cipherText;
}
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