c++ - 解密导致 Rijndael 和 256 block 大小的乱码-6ren

c++ - 解密导致 Rijndael 和 256 block 大小的乱码

转载作者：行者123 更新时间：2023-11-30 05:36:52

<分区>

所以我有一些用这个旧代码加密的旧消息:

'the ecryption algorithm with specific settings
        Dim myRijndael As New RijndaelManaged
        myRijndael.Padding = PaddingMode.Zeros
        myRijndael.Mode = CipherMode.CBC
        myRijndael.KeySize = 256
        myRijndael.BlockSize = 256

        'declared byte arrays for the message string and the key and IV for the encryption algorithm
        Dim encrypted() As Byte
        Dim toEncrypt() As Byte
        Dim key() As Byte
        Dim IV() As Byte

        'populating the arryas with the needed bytes for the encryption algorithm
        key = System.Text.Encoding.ASCII.GetBytes(prm_key)
        IV = System.Text.Encoding.ASCII.GetBytes(prm_iv)

        'the actual instance of the ecryption algorithm
        Dim encryptor As ICryptoTransform = myRijndael.CreateEncryptor(key, IV)

        'streams for the encrypted byte array
        Dim msEncrypt As New MemoryStream()
        Dim csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)

        toEncrypt = System.Text.Encoding.ASCII.GetBytes(text_to_encrypt)

        csEncrypt.Write(toEncrypt, 0, toEncrypt.Length)

        'make sure we have all the blocks
        csEncrypt.FlushFinalBlock()

        'turn encrypted stream into byte array
        encrypted = msEncrypt.ToArray()
        'return a base 64 string so we can upload it to the server
        Return (Convert.ToBase64String(encrypted))

我正在尝试用 Crypto++ 解密

这是我想出的代码:

std::string coded = "pCyWPA5Enc3F0NAkowrt206brSfMrOgKMTXI1pKhCUY=";
//std::string coded = "F9uvtbK3Ue67Gbe9si5yvDn8a50bYnTovjfWali+Xjo=";

std::string coded2;
std::string ciphertext;
std::string decryptedtext;


CryptoPP::StringSource sss(coded, true,
   new CryptoPP::Base64Decoder(
       new CryptoPP::StringSink(ciphertext)
   ) // Base64Decoder
); // StringSource
CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::MAX_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );

CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedtext ),CryptoPP::BlockPaddingSchemeDef::ZEROS_PADDING);
stfDecryptor.Put( reinterpret_cast<const unsigned char*>( ciphertext.c_str() ), ciphertext.size() );
stfDecryptor.MessageEnd();

//
// Dump Decrypted Text
//
std::cout << "Decrypted Text: " << std::endl;
std::cout << decryptedtext;
std::cout << std::endl << std::endl;