/// <summary>
/// Decrypt the specified Encrypted Text using the X509Certificate2
/// and the RSAEncryptionPadding
/// </summary>
/// <param name="encryptedText"></param>
/// <param name="cert"></param>
/// <param name="encryptionAlgo"></param>
/// <returns></returns>
public static string Decrypt(string encryptedText,
X509Certificate2 cert,
RSKEncryptionPadding encryptionAlgo = RSKEncryptionPadding.Pkcs1)
{
byte[] decryptedBytes = null;
RSA privateKey = (RSA)cert.PrivateKey;
byte[] encryptedBytes = Convert.FromBase64String(encryptedText);
switch (encryptionAlgo)
{
case RSKEncryptionPadding.Pkcs1:
decryptedBytes = privateKey.Decrypt(encryptedBytes,
System.Security.Cryptography.RSAEncryptionPadding.Pkcs1);
break;
case RSKEncryptionPadding.OaepSHA256:
decryptedBytes = privateKey.Decrypt(encryptedBytes,
System.Security.Cryptography.RSAEncryptionPadding.OaepSHA256);
break;
}
string decryptedText = Encoding.UTF8.GetString(decryptedBytes);
return(decryptedText);
}
/// <summary>
/// Encrypt the plain text payload using the specified X509Certificate2
/// and the RSAEncryptionPadding
/// </summary>
/// <param name="plainText">Plain Text</param>
/// <param name="cert">X509 Certificate</param>
/// <param name="encryptionAlgo">Encryption Algo</param>
/// <returns>Encrypted Text</returns>
public static string Encrypt(string plainText,
X509Certificate2 cert,
RSKEncryptionPadding encryptionAlgo = RSKEncryptionPadding.Pkcs1)
{
byte[] encryptedBytes = null;
RSA publicKey = (RSA)cert.PublicKey.Key;
byte[] plainBytes = Encoding.UTF8.GetBytes(plainText);
switch (encryptionAlgo)
{
case RSKEncryptionPadding.Pkcs1:
encryptedBytes = publicKey.Encrypt(plainBytes,
System.Security.Cryptography.RSAEncryptionPadding.Pkcs1);
break;
case RSKEncryptionPadding.OaepSHA256:
encryptedBytes = publicKey.Encrypt(plainBytes,
System.Security.Cryptography.RSAEncryptionPadding.OaepSHA256);
break;
}
string encryptedText = Convert.ToBase64String(encryptedBytes);
return(encryptedText);
}
