public void Serializing_and_deserializing_a_private_key_should_result_in_equal_keys()
{
// Arrange
var rsa = new RSACryptoServiceProvider(2048);
var rsaParameters = rsa.ExportParameters(true);
var asn1Parser = new Asn1Parser();
var rsaParser = new RSAPrivateKeyParser(asn1Parser);
var asn1Serializer = new Asn1Serializer();
var asn1Rsa = new RSAPrivateKey(rsaParameters);
// Act
var serializedPEM = asn1Serializer.Serialize(asn1Rsa).ToArray().EncodeAsPEM(PEMExtensions.RSAPrivateKey);
var parsedRsaKey = rsaParser.ParsePem(new MemoryStream(Encoding.ASCII.GetBytes(serializedPEM)));
//TODO this test sometimes has a missing leading '0' byte.
// Assert
parsedRsaKey.Key.Exponent.Should().Equal(rsaParameters.Exponent);
parsedRsaKey.Key.Modulus.Should().Equal(rsaParameters.Modulus);
parsedRsaKey.Key.P.Should().Equal(rsaParameters.P);
parsedRsaKey.Key.D.Should().Equal(rsaParameters.D);
parsedRsaKey.Key.DP.Should().Equal(rsaParameters.DP);
parsedRsaKey.Key.Q.Should().Equal(rsaParameters.Q);
parsedRsaKey.Key.DQ.Should().Equal(rsaParameters.DQ);
parsedRsaKey.Key.InverseQ.Should().Equal(rsaParameters.InverseQ);
}
public static RSAPrivateKey ParsePem(string pem)
{
var asn1Parser = new Asn1Parser();
var rsaParser = new RSAPrivateKeyParser(asn1Parser);
return(rsaParser.ParsePem(pem));
}
public RSAPrivateKey ParsePem(Stream input)
{
var der = DecodePem(input);
using (var derStream = new MemoryStream(der))
{
//TODO add more validation, ensure that the algorithm used is RSA
var asn1 = (Sequence)parser.Parse(derStream).First();
var octet = (OctetString) asn1.Children.Last();
using (var octetStream = new MemoryStream(octet.UnencodedValue))
{
var rsaParser = new RSAPrivateKeyParser(parser);
return rsaParser.ParseDer(octetStream);
}
}
}
// This function supports both PKCS#1 & PKCS#8 encodings
public RSAPrivateKey ParsePem(Stream input)
{
var der = PEM.Decode(input, PEM.PrivateKey);
using (var derStream = new MemoryStream(der))
{
// TODO add more validation, ensure that the algorithm used is RSA
var asn1 = (Sequence)parser.Parse(derStream).First();
var octet = (OctetString)asn1.Children.Last();
using (var octetStream = new MemoryStream(octet.UnencodedValue))
{
var rsaParser = new RSAPrivateKeyParser(parser);
return(rsaParser.ParseDer(octetStream));
}
}
}
public void Can_read_a_private_key_from_a_PEM_file()
{
// Arrange
var asn1Parser = new Asn1Parser();
var sut = new RSAPrivateKeyParser(asn1Parser);
// Act
var rsa = sut.ParsePem(new MemoryStream(Encoding.ASCII.GetBytes(TestPrivateKey)));
// Assert
rsa.Key.Exponent.Should().Equal(1, 0, 1);
rsa.Key.Modulus.Length.Should().Be(256);
rsa.Key.Modulus[0].Should().Be(0xb2);
rsa.Key.Modulus[255].Should().Be(0xab);
rsa.Key.P.Length.Should().Be(128);
}
