/// <summary>
/// Get the RSA crypto service provider for encryption with the public key.
/// </summary>
/// <param name="publicKey">The stream containing the public key data.</param>
/// <param name="password">The password used to decrypt the key within the file.</param>
/// <returns>The RSA cryto service provider with the public key.</returns>
public RSACryptoServiceProvider PublicKeyEncryptionProvider(StreamReader publicKey, string password = null)
{
Key.OpenSsl.PemReader publicKeyReader = null;
if (String.IsNullOrEmpty(password))
{
// Read the public key file.
publicKeyReader = new Key.OpenSsl.PemReader(publicKey);
}
else
{
// Read the public key file.
publicKeyReader = new Key.OpenSsl.PemReader(publicKey, new PasswordFinder(password));
}
// Get the ras key parameters
Key.Crypto.Parameters.RsaKeyParameters rsaPublicKey = (Key.Crypto.Parameters.RsaKeyParameters)publicKeyReader.ReadObject();
// Assign the rsa parameters.
RSAParameters rsaPublicParam = new RSAParameters();
rsaPublicParam.Exponent = rsaPublicKey.Exponent.ToByteArrayUnsigned();
rsaPublicParam.Modulus = rsaPublicKey.Modulus.ToByteArrayUnsigned();
// Create the encyption provider.
RSACryptoServiceProvider rsaEncryptProvider = new RSACryptoServiceProvider();
rsaEncryptProvider.ImportParameters(rsaPublicParam);
// Return the rsa provider.
return(rsaEncryptProvider);
}
/// <summary>
/// Get the RSA crypto service provider.
/// </summary>
/// <param name="publicPrivateKey">The stream containing the public and private key data.</param>
/// <param name="password">The password used to decrypt the key within the file.</param>
/// <returns>The RSA cryto service provider.</returns>
public RSACryptoServiceProvider RSAProvider(StreamReader publicPrivateKey, string password = null)
{
Key.OpenSsl.PemReader keyReader = null;
if (String.IsNullOrEmpty(password))
{
// Read the key file.
keyReader = new Key.OpenSsl.PemReader(publicPrivateKey);
}
else
{
// Read the key file.
keyReader = new Key.OpenSsl.PemReader(publicPrivateKey, new PasswordFinder(password));
}
// Get the ras key parameters
Key.Crypto.AsymmetricCipherKeyPair rsaPrivateKey = (Key.Crypto.AsymmetricCipherKeyPair)keyReader.ReadObject();
// Assign the rsa parameters.
RSAParameters rsaParam = new RSAParameters();
Key.Crypto.Parameters.RsaKeyParameters rsaPrivatePublic = (Key.Crypto.Parameters.RsaKeyParameters)rsaPrivateKey.Public;
Key.Crypto.Parameters.RsaPrivateCrtKeyParameters rsaCrtPrivateParam = (Key.Crypto.Parameters.RsaPrivateCrtKeyParameters)rsaPrivateKey.Private;
rsaParam.D = rsaCrtPrivateParam.Exponent.ToByteArrayUnsigned();
rsaParam.DP = rsaCrtPrivateParam.DP.ToByteArrayUnsigned();
rsaParam.DQ = rsaCrtPrivateParam.DQ.ToByteArrayUnsigned();
rsaParam.InverseQ = rsaCrtPrivateParam.QInv.ToByteArrayUnsigned();
rsaParam.P = rsaCrtPrivateParam.P.ToByteArrayUnsigned();
rsaParam.Q = rsaCrtPrivateParam.Q.ToByteArrayUnsigned();
rsaParam.Modulus = rsaCrtPrivateParam.Modulus.ToByteArrayUnsigned();
rsaParam.Exponent = rsaCrtPrivateParam.PublicExponent.ToByteArrayUnsigned();
// Create the encyption provider.
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();
rsaProvider.ImportParameters(rsaParam);
// Return the rsa provider.
return(rsaProvider);
}
