// Try to find OID info within a specific group, and if that doesn't work fall back to all
// groups for compatibility with previous frameworks
internal static string FindOidInfoWithFallback(uint key, string value, Cryptography.OidGroup group)
{
string info = FindOidInfo(key, value, group);
// If we couldn't find it in the requested group, then try again in all groups
if (info == null && group != Cryptography.OidGroup.All)
{
info = FindOidInfo(key, value, Cryptography.OidGroup.All);
}
return(info);
}
internal static string FindOidInfo(uint keyType, string keyValue, Cryptography.OidGroup oidGroup)
{
if (keyValue == null)
{
throw new ArgumentNullException("keyValue");
}
if (keyValue.Length == 0)
{
return(null);
}
SafeLocalAllocHandle pvKey = SafeLocalAllocHandle.InvalidHandle;
try {
switch (keyType)
{
case CAPI.CRYPT_OID_INFO_OID_KEY:
pvKey = StringToAnsiPtr(keyValue);
break;
case CAPI.CRYPT_OID_INFO_NAME_KEY:
pvKey = StringToUniPtr(keyValue);
break;
default:
Debug.Assert(false);
break;
}
CAPI.CRYPT_OID_INFO pOidInfo = CAPI.CryptFindOIDInfo(keyType, pvKey, oidGroup);
if (keyType == CAPI.CRYPT_OID_INFO_OID_KEY)
{
return(pOidInfo.pwszName);
}
else
{
return(pOidInfo.pszOID);
}
}
finally {
pvKey.Dispose();
}
}
