Refactor WebCrypto code

content/child/webcrypto/nss/key_nss.h

+// Copyright 2014 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 CONTENT_CHILD_WEBCRYPTO_NSS_KEY_NSS_H_
+#define CONTENT_CHILD_WEBCRYPTO_NSS_KEY_NSS_H_
+
+#include "content/child/webcrypto/algorithm_implementation.h"
+
+#include "crypto/scoped_nss_types.h"
+
+namespace content {
+
+namespace webcrypto {
+
+class PrivateKeyNss;
+class PublicKeyNss;
+class SymKeyNss;
+
+// Base key class for all NSS keys, used to safely cast between types. Each key
+// maintains a copy of its serialized form in either 'raw', 'pkcs8', or 'spki'
+// format. This is to allow structured cloning of keys synchronously from the
+// target Blink thread without having to lock access to the key.
+class KeyNss : public blink::WebCryptoKeyHandle {
+ public:
+  explicit KeyNss(const CryptoData& serialized_key_data);
+  virtual ~KeyNss();
+
+  virtual SymKeyNss* AsSymKey();
+  virtual PublicKeyNss* AsPublicKey();
+  virtual PrivateKeyNss* AsPrivateKey();
+
+  const std::vector<uint8>& serialized_key_data() const {
+    return serialized_key_data_;
+  }
+
+ private:
+  const std::vector<uint8> serialized_key_data_;
+};
+
+class SymKeyNss : public KeyNss {
+ public:
+  virtual ~SymKeyNss();
+  SymKeyNss(crypto::ScopedPK11SymKey key, const CryptoData& raw_key_data);
+
+  static SymKeyNss* Cast(const blink::WebCryptoKey& key);
+
+  PK11SymKey* key() { return key_.get(); }
+  virtual SymKeyNss* AsSymKey() OVERRIDE;
+
+  const std::vector<uint8>& raw_key_data() const {
+    return serialized_key_data();
+  }
+
+ private:
+  crypto::ScopedPK11SymKey key_;
+
+  DISALLOW_COPY_AND_ASSIGN(SymKeyNss);
+};
+
+class PublicKeyNss : public KeyNss {
+ public:
+  virtual ~PublicKeyNss();
+  PublicKeyNss(crypto::ScopedSECKEYPublicKey key, const CryptoData& spki_data);
+
+  static PublicKeyNss* Cast(const blink::WebCryptoKey& key);
+
+  SECKEYPublicKey* key() { return key_.get(); }
+  virtual PublicKeyNss* AsPublicKey() OVERRIDE;
+
+  const std::vector<uint8>& spki_data() const { return serialized_key_data(); }
+
+ private:
+  crypto::ScopedSECKEYPublicKey key_;
+
+  DISALLOW_COPY_AND_ASSIGN(PublicKeyNss);
+};
+
+class PrivateKeyNss : public KeyNss {
+ public:
+  virtual ~PrivateKeyNss();
+  PrivateKeyNss(crypto::ScopedSECKEYPrivateKey key,
+                const CryptoData& pkcs8_data);
+
+  static PrivateKeyNss* Cast(const blink::WebCryptoKey& key);
+
+  SECKEYPrivateKey* key() { return key_.get(); }
+  virtual PrivateKeyNss* AsPrivateKey() OVERRIDE;
+
+  const std::vector<uint8>& pkcs8_data() const { return serialized_key_data(); }
+
+ private:
+  crypto::ScopedSECKEYPrivateKey key_;
+
+  DISALLOW_COPY_AND_ASSIGN(PrivateKeyNss);
+};
+
+}  // namespace webcrypto
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_WEBCRYPTO_NSS_KEY_NSS_H_