private static string Decrypt(JvResponse jvResponse)
{
RSACryptoServiceProvider rSA = GetPrivateKeyFromDerFile();
byte[] keyArr = rSA.Decrypt(Convert.FromBase64String(jvResponse.key), RSAEncryptionPadding.Pkcs1);
RijndaelManaged aesEncryption = new RijndaelManaged();
aesEncryption.BlockSize = 128;
aesEncryption.KeySize = 256;
aesEncryption.Mode = CipherMode.ECB;
aesEncryption.Padding = PaddingMode.None;
byte[] KeyArr32BytesValue = new byte[32];
Array.Copy(keyArr, KeyArr32BytesValue, 32);
aesEncryption.Key = KeyArr32BytesValue;
ICryptoTransform decrypto = aesEncryption.CreateDecryptor();
byte[] encryptedBytes = Convert.FromBase64CharArray(jvResponse.payload.ToCharArray(), 0, jvResponse.payload.Length);
byte[] decryptedData = decrypto.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);
return(System.Text.ASCIIEncoding.UTF8.GetString(decryptedData));
}
static void Main(string[] args)
{
string jsonString = "{ \"filter\":{ \"task\":{ \"processInstanceId\":{ \"eq\":\"5fda297111edfb36b766c7871\" } } } }";
String response = EncryptStringToBytes(jsonString);
JvResponse jvResponse = JsonSerializer.Deserialize <JvResponse>(response);
Console.WriteLine(jvResponse.key);
Console.WriteLine(jvResponse.payload);
Console.WriteLine(Decrypt(jvResponse));
}