public static void SignatureAlgorithm_Encoding(string hashAlgorithmName)
{
string expectedOid;
switch (hashAlgorithmName)
{
case "MD5":
expectedOid = "06092A864886F70D010104";
break;
case "SHA1":
expectedOid = "06092A864886F70D010105";
break;
case "SHA256":
expectedOid = "06092A864886F70D01010B";
break;
case "SHA384":
expectedOid = "06092A864886F70D01010C";
break;
case "SHA512":
expectedOid = "06092A864886F70D01010D";
break;
default:
throw new ArgumentOutOfRangeException(nameof(hashAlgorithmName));
}
string expectedHex = $"30{(expectedOid.Length / 2 + 2):X2}{expectedOid}0500";
using (RSA rsa = RSA.Create())
{
RSAParameters parameters = TestData.RsaBigExponentParams;
rsa.ImportParameters(parameters);
HashAlgorithmName hashAlgorithm = new HashAlgorithmName(hashAlgorithmName);
X509SignatureGenerator signatureGenerator = X509SignatureGenerator.CreateForRSA(rsa, RSASignaturePadding.Pkcs1);
byte[] sigAlg = signatureGenerator.GetSignatureAlgorithmIdentifier(hashAlgorithm);
Assert.Equal(expectedHex, sigAlg.ByteArrayToHex());
}
}