WebCrypto: Implement digest() using NSS

content/renderer/webcrypto_digest.h

+// Copyright (c) 2013 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_RENDERER_WEBCRYPTO_DIGEST_H_
+#define CONTENT_RENDERER_WEBCRYPTO_DIGEST_H_
+
+#include "base/compiler_specific.h"
+
+#include "third_party/WebKit/public/platform/WebCrypto.h"
+#include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
+
+#if defined(USE_NSS)
+typedef struct HASHContextStr HASHContext;
+#endif
+
+namespace content {
+
+class WebCryptoDigest : public WebKit::WebCryptoOperation {
+ public:
+  explicit WebCryptoDigest(const WebKit::WebCryptoOperationResult& result);
+  virtual ~WebCryptoDigest();
+
+  bool Initialize(const WebKit::WebCryptoAlgorithm& algorithm);
+
+  virtual void process(const unsigned char* bytes, size_t size) OVERRIDE;

[jamesr, 2013/08/07 23:25:31]

document what interface these are overriding

if they're from the interface defined in a third_party/WebKit/... header, don't
use OVERRIDE.  Having the OVERRIDE annotation on cross-repository dependencies
makes the interface much harder to iterate on since you can't atomically change
the interface and implementations.

+  virtual void abort() OVERRIDE;
+  virtual void finish() OVERRIDE;
+
+ private:
+  WebKit::WebCryptoOperationResult result_;
+
+#if defined(USE_NSS)
+  HASHContext* context_;
+#endif
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_WEBCRYPTO_DIGEST_H_