public void ToHashAlgorithm()
{
foreach (HashAlgorithmName name in this.GetNames())
{
HashAlgorithm algorithm = HashAlgorithmConvertor.ToHashAlgorithm(name);
Assert.IsNotNull(algorithm);
}
}
public void TryFromOid()
{
Assert.IsTrue(HashAlgorithmConvertor.TryFromOid(Oids.SHA384, out HashAlgorithmName name1));
Assert.AreEqual(HashAlgorithmName.SHA384, name1);
Assert.IsTrue(HashAlgorithmConvertor.TryFromOid(Oids.SHA256, out HashAlgorithmName name2));
Assert.AreEqual(HashAlgorithmName.SHA256, name2);
Assert.IsFalse(HashAlgorithmConvertor.TryFromOid("1.4.74.12.1.4", out _));
}
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);
}
}
public void ToOid()
{
foreach (HashAlgorithmName name in this.GetNames())
{
string oid = HashAlgorithmConvertor.ToOid(name);
Assert.IsNotNull(oid);
Assert.AreNotEqual(string.Empty, oid);
}
}
private static void ConstructAsn1(HashAlgorithmName hashAlgorithmName, ReadOnlySpan <byte> digest, AsnWriter asnWriter)
{
// Digest info
asnWriter.PushSequence();
// AlgorithmIdetifier
string oid = HashAlgorithmConvertor.ToOid(hashAlgorithmName);
asnWriter.PushSequence();
asnWriter.WriteObjectIdentifier(oid);
asnWriter.WriteNull();
asnWriter.PopSequence();
asnWriter.WriteOctetString(digest);
asnWriter.PopSequence();
}
private static byte[] CreateRawAsn1(string policyOid, HashAlgorithmName algorithmNameForPolicy, ReadOnlySpan <byte> policyHashValue)
{
if (policyOid == null)
{
throw new ArgumentNullException(nameof(policyOid));
}
using AsnWriter asnWriter = new AsnWriter(AsnEncodingRules.DER);
asnWriter.PushSequence();
asnWriter.WriteObjectIdentifier(policyOid);
asnWriter.PushSequence();
asnWriter.WriteObjectIdentifier(HashAlgorithmConvertor.ToOid(algorithmNameForPolicy));
asnWriter.WriteOctetString(policyHashValue);
asnWriter.PopSequence();
asnWriter.PopSequence();
return(asnWriter.Encode());
}
private static byte[] CreateRawAsn1(string policyOid, HashAlgorithmName algorithmNameForPolicy, ReadOnlySpan <byte> policyHashValue)
{
ThrowHelpers.CheckNullOrEempty(nameof(policyOid), policyOid);
using AsnWriter asnWriter = new AsnWriter(AsnEncodingRules.DER);
asnWriter.PushSequence();
asnWriter.WriteObjectIdentifier(policyOid);
asnWriter.PushSequence();
asnWriter.PushSequence();
asnWriter.WriteObjectIdentifier(HashAlgorithmConvertor.ToOid(algorithmNameForPolicy));
asnWriter.WriteNull();
asnWriter.PopSequence();
asnWriter.WriteOctetString(policyHashValue);
asnWriter.PopSequence();
asnWriter.PopSequence();
return(asnWriter.Encode());
}
private static void ConstructAsn1(HashAlgorithmName hashAlgorithmName, ReadOnlySpan <byte> digest, AsnWriter asnWriter)
{
string oid = HashAlgorithmConvertor.ToOid(hashAlgorithmName);
int size = HashAlgorithmConvertor.ToHashSizeInBytes(hashAlgorithmName);
if (digest.Length != size)
{
throw new ArgumentOutOfRangeException(nameof(digest), $"digest has bad length. Expected size of {hashAlgorithmName.Name} digest is {size}B, actual length is {digest.Length}.");
}
// Digest info
asnWriter.PushSequence();
// AlgorithmIdetifier
asnWriter.PushSequence();
asnWriter.WriteObjectIdentifier(oid);
asnWriter.WriteNull();
asnWriter.PopSequence();
asnWriter.WriteOctetString(digest);
asnWriter.PopSequence();
}
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());
}
