Add TrustStoreNSS and TrustStoreCollection

net/cert/internal/trust_store_nss.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_CERT_INTERNAL_TRUST_STORE_NSS_H_
+#define NET_CERT_INTERNAL_TRUST_STORE_NSS_H_
+
+#include "base/memory/ref_counted.h"
+#include "net/base/net_export.h"
+#include "net/cert/internal/trust_store.h"
+
+namespace base {
+class TaskRunner;
+}
+
+namespace net {
+
+// TrustStoreNSS is an implementation of TrustStore which uses NSS to find trust
+// anchors for path building.
+// TODO(mattm) also implement CertIssuerSource to return intermediates in NSS
+// DB? Or have a separate CertIssuerSourceNSS for that?  (implementing both in
+// the same class could be more efficient with some caching/etc. Need to be
+// careful about caching between different pathbuilder instances though.)
+class NET_EXPORT TrustStoreNSS : public TrustStore {
+ public:
+  // Creates a TrustStoreNSS. All NSS calls will be done on |nss_task_runner|.
+  explicit TrustStoreNSS(scoped_refptr<base::TaskRunner> nss_task_runner);
+  ~TrustStoreNSS() override;
+
+  // TrustStore implementation:
+  void FindTrustAnchorsForCert(
+      const ParsedCertificate* cert,
+      const TrustAnchorCallback& callback,
+      TrustAnchors* out_matches,
+      std::unique_ptr<Request>* out_req) const override;
+
+ private:
+  scoped_refptr<base::TaskRunner> nss_task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrustStoreNSS);
+};
+
+}  // namespace net
+
+#endif  // NET_CERT_INTERNAL_TRUST_STORE_NSS_H_