private static void VerifyExpectedRequest(Rfc3161TimestampRequest request, bool viaSpan)
{
// Captured with Fiddler from a CryptRetrieveTimestamp call
const string ExpectedHex =
"30390201013031300D06096086480165030402010500042011806C2441295EA6" +
"97EA96EE4247C0F9C71EE7638863CB8E29CD941A488FCB5A0101FF";
Assert.Equal(1, request.Version);
Assert.Equal(
"11806C2441295EA697EA96EE4247C0F9C71EE7638863CB8E29CD941A488FCB5A",
request.GetMessageHash().ByteArrayToHex());
Assert.False(request.GetNonce().HasValue, "request.GetNonce().HasValue");
Assert.Equal("2.16.840.1.101.3.4.2.1", request.HashAlgorithmId.Value);
Assert.Null(request.RequestedPolicyId);
Assert.True(request.RequestSignerCertificate, "request.RequestSignerCertificate");
Assert.False(request.HasExtensions);
if (viaSpan)
{
// Twice as big as it needs to be.
byte[] buf = new byte[ExpectedHex.Length];
const byte FillByte = 0x55;
buf.AsSpan().Fill(FillByte);
// Too small
Assert.False(request.TryEncode(Span <byte> .Empty, out int bytesWritten));
Assert.Equal(0, bytesWritten);
const int WriteOffset = 7;
// Too small
Span <byte> dest = new Span <byte>(buf, WriteOffset, (ExpectedHex.Length / 2) - 1);
Assert.False(request.TryEncode(dest, out bytesWritten));
Assert.Equal(0, bytesWritten);
Assert.Equal(new string('5', buf.Length * 2), buf.ByteArrayToHex());
// Bigger than needed
dest = new Span <byte>(buf, WriteOffset, buf.Length - WriteOffset);
Assert.True(request.TryEncode(dest, out bytesWritten));
Assert.Equal(ExpectedHex.Length / 2, bytesWritten);
Assert.Equal(ExpectedHex, dest.Slice(0, bytesWritten).ByteArrayToHex());
Assert.Equal(FillByte, buf[WriteOffset - 1]);
Assert.Equal(FillByte, buf[WriteOffset + bytesWritten]);
// Reset
dest.Fill(FillByte);
// Perfectly sized
dest = dest.Slice(0, bytesWritten);
Assert.True(request.TryEncode(dest, out bytesWritten));
Assert.Equal(ExpectedHex.Length / 2, bytesWritten);
Assert.Equal(ExpectedHex, dest.ByteArrayToHex());
Assert.Equal(FillByte, buf[WriteOffset - 1]);
Assert.Equal(FillByte, buf[WriteOffset + bytesWritten]);
}
else
{
byte[] encoded = request.Encode();
Assert.Equal(ExpectedHex, encoded.ByteArrayToHex());
}
}