Encrypt in c++ Qt / decrypt in C#

crypto-cpp-csharp

#include <QCoreApplication>
#include <QString>
#include <Poco/Foundation.h>
#include <Poco/Crypto/Cipher.h>
#include <Poco/Crypto/CipherKey.h>
#include <Poco/Crypto/CipherFactory.h>
#include <openssl/crypto.h>
#include <QDebug>



int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    std::string password = "01234567891234560123456789123456";
    std::string ivString("0123456789123456");
    Poco::Crypto::Cipher::ByteVec iv { ivString.begin(), ivString.end()};

    Poco::Crypto::Cipher::ByteVec key2 {password.begin(), password.end()};

    Poco::Crypto::CipherFactory& factory = Poco::Crypto::CipherFactory::defaultFactory();
    Poco::Crypto::CipherKey key("aes-256-cbc", key2, iv); // iterationCount = 1
    Poco::Crypto::Cipher* pCipher = factory.createCipher(key);

    std::string plainText =  "123456789012345";

    std::string encrypted = pCipher->encryptString(plainText, Poco::Crypto::Cipher::ENC_BASE64); //Base64-encoded output
    qDebug() << "plainText=" << QString().fromStdString(plainText);
    qDebug() << "encrypted=" << QString().fromStdString(encrypted);
    std::string decrypted = pCipher->decryptString(encrypted, Poco::Crypto::Cipher::ENC_BASE64);
    qDebug() << "decrypted=" << QString().fromStdString(decrypted);
    return a.exec();
}


##### c# ####

public static string Decrypt(string encryptedInputBase64)
        {

            using (AesCryptoServiceProvider aesEncryptor = new AesCryptoServiceProvider())
            {
                var encryptedData = Convert.FromBase64String(encryptedInputBase64);
                var btKey = System.Text.Encoding.ASCII.GetBytes("01234567891234560123456789123456");
                byte[] iv = Encoding.ASCII.GetBytes("0123456789123456");

                var keyString = System.Text.Encoding.Unicode.GetString(aesEncryptor.Key);
                aesEncryptor.Mode = CipherMode.CBC;
                aesEncryptor.Padding = PaddingMode.PKCS7;
                aesEncryptor.KeySize = 256;
                aesEncryptor.BlockSize = 128;
                aesEncryptor.Key = btKey;

                aesEncryptor.IV = iv;

                return InternalDecrypt(aesEncryptor, encryptedData);
            }
        }


        private static string InternalDecrypt(AesCryptoServiceProvider aesEncryptor, byte[] encryptedData)
        {
            using (ICryptoTransform decryptor = aesEncryptor.CreateDecryptor(aesEncryptor.Key,
                                                                             aesEncryptor.IV))
            {
                byte[] decrypted;
                // Create the streams used for decryption.
                using (MemoryStream msDecrypt = new MemoryStream(encryptedData))
                {
                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt,
                                                                     decryptor,
                                                                     CryptoStreamMode.Read))
                    {
                        decrypted = new byte[encryptedData.Length];
                        var byteCount = csDecrypt.Read(decrypted, 0, encryptedData.Length);
                        string strResult = Encoding.ASCII.GetString(decrypted);
                        int pos = strResult.IndexOf('\0');
                        if (pos >= 0)
                            strResult = strResult.Substring(0, pos);
                        return strResult;
                    }
                }
            }
        }

thank you I was looking for an example of Poco::Crypto , i found your code .