public DigitalSignatureCreationResult Sign(DigitalSignatureCreationArguments arguments)
{
var res = new DigitalSignatureCreationResult();
try
{
var rsaProviderReceiver = new RSACryptoServiceProvider();
rsaProviderReceiver.FromXmlString(arguments.PublicKeyForEncryption.ToString());
var encryptionResult = rsaProviderReceiver.Encrypt(Encoding.UTF8.GetBytes(arguments.Message), false);
var hashed = _hashingService.Hash(Convert.ToBase64String(encryptionResult));
var rsaProviderSender = new RSACryptoServiceProvider();
rsaProviderSender.FromXmlString(arguments.FullKeyForSignature.ToString());
var signatureFormatter = new RSAPKCS1SignatureFormatter(rsaProviderSender);
signatureFormatter.SetHashAlgorithm(_hashingService.HashAlgorithmCode());
var signature = signatureFormatter.CreateSignature(hashed.HashedBytes);
res.Signature = signature;
res.CipherText = Convert.ToBase64String(encryptionResult);
res.Success = true;
}
catch (Exception ex)
{
res.ExceptionMessage = ex.Message;
}
return(res);
}
public void DigitalSignatureServiceTest()
{
var asymmetricService = new RsaAsymmetricCryptographyService();
var keyPairGenerationResultReceiver = asymmetricService.GenerateAsymmetricKeys(1024);
var keyPairGenerationResultSender = asymmetricService.GenerateAsymmetricKeys(1024);
var digitalSignatureService = new RsaPkcs1DigitalSignatureService(new Sha1ManagedHashingService());
var signatureCreationArgumentsFromSender = new DigitalSignatureCreationArguments()
{
Message = "eper málna körte",
FullKeyForSignature = keyPairGenerationResultSender.FullKeyPairXml,
PublicKeyForEncryption = keyPairGenerationResultReceiver.PublicKeyOnlyXml
};
var signatureCreationResult = digitalSignatureService.Sign(signatureCreationArgumentsFromSender);
Assert.AreEqual(true, signatureCreationResult.Success);
var verificationArgumentsFromReceiver = new DigitalSignatureVerificationArguments();
verificationArgumentsFromReceiver.CipherText = signatureCreationResult.CipherText;
verificationArgumentsFromReceiver.Signature = signatureCreationResult.Signature;
verificationArgumentsFromReceiver.PublicKeyForSignatureVerification = keyPairGenerationResultSender.PublicKeyOnlyXml;
verificationArgumentsFromReceiver.FullKeyForDecryption = keyPairGenerationResultReceiver.FullKeyPairXml;
var verificationResult = digitalSignatureService.VerifySignature(verificationArgumentsFromReceiver);
Assert.AreEqual(true, verificationResult.Success);
Assert.AreEqual(true, verificationResult.SignaturesMatch);
}
public DigitalSignatureCreationResult Sign(DigitalSignatureCreationArguments arguments)
{
var res = new DigitalSignatureCreationResult();
try
{
var rsaProviderReceiver = new RSACryptoServiceProvider();
rsaProviderReceiver.FromXmlString(arguments.PublicKeyForEncryption.ToString());
var encryptionResult = rsaProviderReceiver.Encrypt(Encoding.UTF8.GetBytes(arguments.Message), false);
var hashed = _hashingService.Hash(Convert.ToBase64String(encryptionResult));
var rsaProviderSender = new RSACryptoServiceProvider();
rsaProviderSender.FromXmlString(arguments.FullKeyForSignature.ToString());
var signatureFormatter = new RSAPKCS1SignatureFormatter(rsaProviderSender);
signatureFormatter.SetHashAlgorithm(_hashingService.HashAlgorithmCode());
var signature = signatureFormatter.CreateSignature(hashed.HashedBytes);
res.Signature = signature;
res.CipherText = Convert.ToBase64String(encryptionResult);
res.Success = true;
}
catch (Exception ex)
{
res.ExceptionMessage = ex.Message;
}
return res;
}
