org.bouncycastle.crypto.datalength Exception：最后一个块解密不完整

Question

我已经使用弹力城堡库实施了AES 256欧洲央行加密和解密。我能够加密数据，但无法解密密码文本。它引发了一个错误，说“ org.bouncycastle.crypto.datalength Exception：最后一个块不完整”。以下是我的加密和解密代码；

public byte[] encrypt(byte[] skey, byte[] data)
{
   PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(
   new AesEngine(), new Pkcs7Padding());
   cipher.Init(true, new KeyParameter(skey));
   int outputSize = cipher.GetOutputSize(data.Length);
   byte[] tempOP = new byte[outputSize];
   int processLen = cipher.ProcessBytes(data, 0, data.Length, tempOP, 0);
   int outputLen = cipher.DoFinal(tempOP, processLen);
   byte[] result = new byte[processLen + outputLen];
   Array.Copy(tempOP, 0, result, 0, result.Length);
   return result;
}
public byte[] decrypt(byte[] skey, byte[] data)
{
    PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(
    new AesEngine(), new Pkcs7Padding());
    cipher.Init(false, new KeyParameter(skey));
    int outputSize = cipher.GetOutputSize(data.Length);

    byte[] tempOP = new byte[outputSize];
    int processLen = cipher.ProcessBytes(data, 0, data.Length, tempOP, 0);
    int outputLen = cipher.DoFinal(tempOP, processLen);

    byte[] result = new byte[processLen + outputLen];
    Array.Copy(tempOP, 0, result, 0, result.Length);
    return result;    
}

Answer 1

我也有同样的问题。

类型：org.bouncycastle.crypto.datalength Exception
stacktrace：at org.bouncycastle.crypto.paddings.paddedbufferedblockcipher.dofinal（byte [Byte [] output，int32 Outoff）in/_/_/crypto/src/src/crypto/crypto/ppto/paddings/paddedbufferedblockcipher.csline offinal.padddedbufferdblockcipher.csline 281- fofinal 281-

fofinal法

        if (bufOff == blockSize)
        {
            num = cipher.ProcessBlock(buf, 0, buf, 0);
            bufOff = 0;
            try
            {
                num -= padding.PadCount(buf);
                Array.Copy(buf, 0, output, outOff, num);
                return num;
            }
            finally
            {
                Reset();
            }
        }

        Reset();
        **throw new DataLengthException("last block incomplete in decryption");**