public SecRecord(SecKind secKind)
{
var kind = SecClass.FromSecKind(secKind);
_queryDict = CFMutableDictionary.Create();
_queryDict.SetValue(SecClassKey, kind);
}
static SafeSecIdentityHandle FindIdentity(Predicate <SafeSecCertificateHandle> filter)
{
Initialize();
/*
* Unfortunately, SecItemCopyMatching() does not allow any search
* filters when looking up an identity.
*
* The following lookup will return all identities from the keychain -
* we then need need to find the right one.
*/
using (var query = CFMutableDictionary.Create()) {
query.SetValue(SecClassKey, SecClassIdentity);
query.SetValue(CFBoolean.True.Handle, ReturnRef);
query.SetValue(MatchLimitAll, MatchLimit);
var status = SecItemCopyMatching(query.Handle, out var ptr);
if (status != SecStatusCode.Success || ptr == IntPtr.Zero)
{
return(null);
}
using (var array = new CFArray(ptr, false)) {
for (int i = 0; i < array.Count; i++)
{
var item = array[i];
if (!MonoCertificatePal.IsSecIdentity(item))
{
throw new InvalidOperationException();
}
using (var identity = new SafeSecIdentityHandle(item))
using (var certificate = MonoCertificatePal.GetCertificate(identity)) {
if (filter(certificate))
{
return(new SafeSecIdentityHandle(item));
}
}
}
}
}
return(null);
}