private List <IX509Extension> getExtensionsWithoutPoisonAndSCT(IX509Extension extensions, IX509Extension replacementX509authorityKeyIdentifier)
{
var extensionsOidsArray = extensions.CriticalExtensionOIDs;
IEnumerator <DerObjectIdentifier> extensionsOids = (IEnumerator <DerObjectIdentifier>)extensionsOidsArray.GetEnumerator();
// Order is important, which is why a list is used.
List <IX509Extension> outputExtensions = new List <IX509Extension>();
while (extensionsOids.MoveNext())
{
DerObjectIdentifier extn = extensionsOids.Current;
string extnId = extn.Id;
if (extnId.Equals(CTConstants.PoisonExtensionOid))
{
// Do nothing - skip copying this extension
}
else if (extnId.Equals(CTConstants.SctCertificateOid))
{
// Do nothing - skip copying this extension
}
else if ((extnId.Equals(X509_AUTHORITY_KEY_IDENTIFIER)) &&
(replacementX509authorityKeyIdentifier != null))
{
// Use the real issuer's authority key identifier, since it's present.
outputExtensions.Add(replacementX509authorityKeyIdentifier);
}
else
{
// Copy the extension as-is.
outputExtensions.Add(extensions);
}
}
return(outputExtensions);
}
/// <summary>
/// Get the value of an extension oid.
/// </summary>
private static Asn1Object GetExtensionValue(IX509Extension extension, DerObjectIdentifier oid)
{
Asn1OctetString asn1Octet = extension.GetExtensionValue(oid);
if (asn1Octet != null)
{
return(X509ExtensionUtilities.FromExtensionValue(asn1Octet));
}
return(null);
}
internal static Asn1Object GetExtensionValue(IX509Extension ext, DerObjectIdentifier oid)
{
Asn1OctetString extensionValue = ext.GetExtensionValue(oid);
if (extensionValue == null)
{
return(null);
}
return(X509ExtensionUtilities.FromExtensionValue(extensionValue));
}
private static Asn1Object GetExtensionValue(IX509Extension ext, DerObjectIdentifier oid)
{
Asn1OctetString bytes = ext.GetExtensionValue(oid);
if (bytes == null)
{
return(null);
}
return(Org.BouncyCastle.X509.Extension.X509ExtensionUtilities.FromExtensionValue(bytes));
}
/// <summary>
/// Extract the value of the given extension, if it exists.
/// </summary>
/// <param name="ext">The extension object.</param>
/// <param name="oid">The object identifier to obtain.</param>
/// <returns>Asn1Object</returns>
/// <exception cref="Exception">if the extension cannot be read.</exception>
internal static Asn1Object GetExtensionValue(
IX509Extension ext,
DerObjectIdentifier oid)
{
Asn1OctetString bytes = ext.GetExtensionValue(oid);
if (bytes == null)
return null;
return X509ExtensionUtilities.FromExtensionValue(bytes);
}
