我正在尝试将这个C代码转换成Python(2.7)。问题是解密的结果与python代码不符。IV和钥匙是正确的。在
我找到了很多关于Python和C的主题,但是我没有找到答案。在
C加密:
class Tracer
{
private static readonly int BlockBitSize = 128;
private static readonly int KeyBitSize = 256;
internal static byte[] In(byte[] plainBytes, byte[] uid)
{
using (var sha = new SHA512Managed())
{
var hash = sha.ComputeHash(uid);
return In(plainBytes, hash.Skip(32).Take(32).ToArray(), hash.Take(16).ToArray());
}
}
internal static byte[] In(byte[] plainBytes, byte[] key, byte[] iv)
{
if (key == null || key.Length != KeyBitSize / 8)
throw new ArgumentException(String.Format("Key needs to be {0} bit!", KeyBitSize), "key");
if (iv == null || iv.Length != BlockBitSize / 8)
throw new ArgumentException(String.Format("IV needs to be {0} bit!", BlockBitSize), "iv");
using (AesManaged aes = new AesManaged())
{
aes.KeySize = KeyBitSize;
aes.BlockSize = BlockBitSize;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.None;
using (ICryptoTransform encrypter = aes.CreateEncryptor(key, iv))
using (MemoryStream cipherStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(cipherStream, encrypter, CryptoStreamMode.Write))
{
cryptoStream.Write(plainBytes, 0, plainBytes.Length);
cryptoStream.FlushFinalBlock();
}
return cipherStream.ToArray();
}
}
}
internal static byte[] Out(byte[] cipherBytes, byte[] uid)
{
using (var sha = new SHA512Managed())
{
var hash = sha.ComputeHash(uid);
return Out(cipherBytes, hash.Skip(32).Take(32).ToArray(), hash.Take(16).ToArray());
}
}
internal static byte[] Out(byte[] cipherBytes, byte[] key, byte[] iv)
{
if (key == null || key.Length != KeyBitSize / 8)
throw new ArgumentException(String.Format("Key needs to be {0} bit!", KeyBitSize), "key");
if (iv == null || iv.Length != BlockBitSize / 8)
throw new ArgumentException(String.Format("IV needs to be {0} bit!", BlockBitSize), "iv");
using (AesManaged aes = new AesManaged())
{
aes.KeySize = KeyBitSize;
aes.BlockSize = BlockBitSize;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.None;
using (ICryptoTransform decrypter = aes.CreateDecryptor(key, iv))
using (MemoryStream plainStream = new MemoryStream())
{
using (var decrypterStream = new CryptoStream(plainStream, decrypter, CryptoStreamMode.Write))
using (var binaryWriter = new BinaryWriter(decrypterStream))
{
//Decrypt Cipher Text from Message
binaryWriter.Write(cipherBytes, 0, cipherBytes.Length);
}
//Return Plain Text
return plainStream.ToArray();
}
}
}
}
Python解密
^{pr2}$注:对不起我的英语
谢谢你的帮助!在
编辑:Python中的AES解密返回64个字符,这是错误的。原始明文是32。在
更新了Python代码EDIT2。解密函数现在返回32个字符,但仍然出错
用于生成密钥的摘要和iv是用正确的数据生成的,但使用的是字符串。相反地,C#用一系列数据生成摘要。多亏了BitArray Python library,我解决了我的问题:
新的Python代码:
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