Rsa Decryption using private key in c# | RSA Decryption using private key in Asp.net Core

RSA Decryption using the private key in Asp.net Core

To perform RSA decryption using a private key in C#, you can use the System.Security.Cryptography namespace,

 which provides classes for working with cryptographic operations

The RSA256 

Only Available .framework 6.1 and later versions.

1. Decrypt data:

Now, you can use the RSACryptoServiceProvider to decrypt data

2. Load the private key:

You can load the private key from a file or another source (like a Base64 encoded string). The private key should be in XML format.

string privateKeyXml = privateKeyXML; // Input (without header)

      using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
      {
          rsa.FromXmlString(privateKeyXml);
      }
      byte[] GWSymmetricencryptedData = Convert.FromBase64String(DecryptText.ToString()); // Input

      using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
      {
          rsa.FromXmlString(privateKeyXml);
          byte[] decryptedData = rsa.Decrypt(GWSymmetricencryptedData, false);
          string decryptedSymmetricKey = Encoding.UTF8.GetString(decryptedData);
          FinalSymatricKeyGetfromBankResponse = decryptedSymmetricKey;
      }
Response like: **