internal static CoseHeaderMap GetHeaderMapWithAlgorithm(CoseAlgorithm algorithm = CoseAlgorithm.ES256)
{
var protectedHeaders = new CoseHeaderMap();
protectedHeaders.SetValue(CoseHeaderLabel.Algorithm, (int)algorithm);
return(protectedHeaders);
}
public CommonAttestation MarshalToPublic()
{
var algoStr = (HashAlgorithm == IntPtr.Zero ? null : Marshal.PtrToStringUni(HashAlgorithm)) ?? "ES256";
if (CoseAlgorithm == 0)
{
CoseAlgorithm = CoseAlgorithm.ECDSA_P256_WITH_SHA256;
}
var signature = new byte[SignatureBytes];
if (SignatureBytes > 0)
{
Marshal.Copy(Signature, signature, 0, SignatureBytes);
}
var certs = new List <X509Certificate2>();
var pos = X5c;
var x5cStep = Marshal.SizeOf <RawWebAuthnX5C>();
for (var n = 0; n < X5cCount; n++)
{
var certBlock = Marshal.PtrToStructure <RawWebAuthnX5C>(pos);
var data = new byte[certBlock.DataBytes];
Marshal.Copy(certBlock.Data, data, 0, certBlock.DataBytes);
var decoded = new X509Certificate2(data);
certs.Add(decoded);
pos += x5cStep;
}
var tpmVersion = Marshal.PtrToStringUni(Version);
var certInfo = new byte[CertInfoBytes];
if (CertInfoBytes > 0)
{
Marshal.Copy(CertInfo, certInfo, 0, CertInfoBytes);
}
var pubArea = new byte[PubAreaBytes];
if (PubAreaBytes > 0)
{
Marshal.Copy(PubArea, pubArea, 0, PubAreaBytes);
}
return(new CommonAttestation
{
Algorithm = algoStr,
CoseAlgorithm = CoseAlgorithm,
Signature = signature,
Certificates = certs,
TpmVersion = tpmVersion,
TpmCertInfo = certInfo,
TpmPubArea = pubArea
});
}
internal static List <(CoseHeaderLabel, ReadOnlyMemory <byte>)> GetExpectedProtectedHeaders(CoseAlgorithm algorithm)
{
var l = new List <(CoseHeaderLabel, ReadOnlyMemory <byte>)>();
AddEncoded(l, CoseHeaderLabel.Algorithm, (int)algorithm);
return(l);
}
internal void AssertCoseSignMessage(
ReadOnlySpan <byte> encodedMsg,
ReadOnlySpan <byte> expectedContent,
AsymmetricAlgorithm key,
CoseAlgorithm algorithm,
List <(CoseHeaderLabel, ReadOnlyMemory <byte>)>?expectedProtectedHeaders = null,
public CoseCredentialParameter(CoseAlgorithm algo) => Algorithm = algo;