public void ToHashAlgorithm()
{
foreach (HashAlgorithmName name in this.GetNames())
{
HashAlgorithm algorithm = HashAlgorithmConvertor.ToHashAlgorithm(name);
Assert.IsNotNull(algorithm);
}
}
public void ToHashSizeInBytes()
{
foreach (HashAlgorithmName name in this.GetNames())
{
int size = HashAlgorithmConvertor.ToHashSizeInBytes(name);
HashAlgorithm algorithm = HashAlgorithmConvertor.ToHashAlgorithm(name);
Assert.AreEqual(algorithm.HashSize / 8, size);
}
}
private static byte[] CreateRawAsn1(IEnumerable <X509Certificate2> signingCertificates, HashAlgorithmName hashAlgorithmName)
{
if (signingCertificates == null)
{
throw new ArgumentNullException(nameof(signingCertificates));
}
using HashAlgorithm hasher = HashAlgorithmConvertor.ToHashAlgorithm(hashAlgorithmName);
Span <byte> hash = stackalloc byte[hasher.HashSize / 8];
using AsnWriter asnWriter = new AsnWriter(AsnEncodingRules.DER);
asnWriter.PushSequence();
asnWriter.PushSequence();
foreach (X509Certificate2 signingCertificate in signingCertificates)
{
hasher.TryComputeHash(signingCertificate.RawData, hash, out _);
// Begin essCertIDv2
asnWriter.PushSequence();
// Begin algorithm identifier
asnWriter.PushSequence();
asnWriter.WriteObjectIdentifier(HashAlgorithmConvertor.ToOid(hashAlgorithmName));
asnWriter.WriteNull();
asnWriter.PopSequence();
// End Algorithm identifier
asnWriter.WriteOctetString(hash);
asnWriter.PopSequence();
// End essCertIDv2
}
asnWriter.PopSequence();
asnWriter.PopSequence();
return(asnWriter.Encode());
}
