internal SubjectIdentifier(SignerIdentifierAsn signerIdentifierAsn)
{
if (signerIdentifierAsn.IssuerAndSerialNumber.HasValue)
{
ReadOnlySpan <byte> issuerNameSpan = signerIdentifierAsn.IssuerAndSerialNumber.Value.Issuer.Span;
ReadOnlySpan <byte> serial = signerIdentifierAsn.IssuerAndSerialNumber.Value.SerialNumber.Span;
bool nonZero = false;
for (int i = 0; i < serial.Length; i++)
{
if (serial[i] != 0)
{
nonZero = true;
break;
}
}
// If the serial number is zero and the subject is exactly "CN=Dummy Signer"
// then this is the special "NoSignature" signer.
if (!nonZero &&
DummySignerEncodedValue.AsReadOnlySpan().SequenceEqual(issuerNameSpan))
{
Type = SubjectIdentifierType.NoSignature;
Value = null;
}
else
{
Type = SubjectIdentifierType.IssuerAndSerialNumber;
var name = new X500DistinguishedName(issuerNameSpan.ToArray());
Value = new X509IssuerSerial(name.Name, serial.ToSkiString());
}
}
else if (signerIdentifierAsn.SubjectKeyIdentifier != null)
{
Type = SubjectIdentifierType.SubjectKeyIdentifier;
Value = signerIdentifierAsn.SubjectKeyIdentifier.Value.Span.ToSkiString();
}
else
{
Debug.Fail("Do not know how to decode value");
throw new CryptographicException();
}
}
internal SubjectIdentifier(SignerIdentifierAsn signerIdentifierAsn)
: this(signerIdentifierAsn.IssuerAndSerialNumber, signerIdentifierAsn.SubjectKeyIdentifier)
{
}