我需要在授权过程中解密字符串。
文档指定使用以下设置加密授权字符串:
PKCS*7
C#示例:
/// <summary>
/// Decrypts a string.
/// </summary>
/// <param name="content">The string to decrypt.</param>
/// <param name="password">The password to use.</param>
/// <returns>The decrypted string.</returns>
private static string DecryptString(string content, string password)
{
Rijndael aes;
byte[] retVal = null;
byte[] contentBytes;
byte[] passwordBytes;
byte[] ivBytes;
try
{
contentBytes = Convert.FromBase64String(content);
//Create the password and initial vector bytes
passwordBytes = new byte[32];
ivBytes = new byte[16];
Array.Copy(Encoding.Unicode.GetBytes(password), passwordBytes, Encoding.Unicode.GetBytes(password).Length);
Array.Copy(passwordBytes, ivBytes, 16);
//Create the cryptograpy object
using (aes = Rijndael.Create())
{
aes.Key = passwordBytes;
aes.IV = ivBytes;
aes.Padding = PaddingMode.PKCS7;
//Decrypt
retVal = aes.CreateDecryptor().TransformFinalBlock(contentBytes, 0, contentBytes.Length);
}
}
catch
{
}
return Encoding.Unicode.GetString(retVal);
}
此处讨论了相同的功能,但对于JAVA:Decrypt C# RIJNDAEL encoded text
我尝试使用以下函数解密它,但结果与预期不同:
function decrypt($string, $pass){
$iv = substr($pass, 0, 16);
$data = mcrypt_decrypt(MCRYPT_RIJNDAEL_256,
$pass,
base64_decode($string),
MCRYPT_MODE_CBC,
$iv);
$pad = ord($data[strlen($data) - 1]);
return substr($data, 0, -$pad);
}
ecrypted string "7iTdZnp0DtGnIfwwqY4W/glbLLVZ0+asVLAuz13PzrW0wM6HC7rNuQvcG8JDSehyYeBJARdXHgLo9hRL9sBz3fN5LJ8cro3o0kFnAao2YRU="
应该解密到
"ldYWMFlSbcki6LMl3rkNfGavnt8VqmZd"
使用密码"GAT"
我认为这与密码/ iv / encoding
有关