WebCrypto: Implement digest() using NSS

content/renderer/webcrypto_sha_digest.h

Index: content/renderer/webcrypto_sha_digest.h
diff --git a/content/renderer/webcrypto_sha_digest.h b/content/renderer/webcrypto_sha_digest.h
new file mode 100644
index 0000000000000000000000000000000000000000..01309bf22635ce6b6c0545eb9403387afa28eb5f
--- /dev/null
+++ b/content/renderer/webcrypto_sha_digest.h
@@ -0,0 +1,42 @@
+// 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_SHA_DIGEST_H_
+#define CONTENT_RENDERER_WEBCRYPTO_SHA_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 WebCryptoSHADigest : public WebKit::WebCryptoOperation {
+ public:
+  explicit WebCryptoSHADigest(WebKit::WebCryptoOperationResult& result);
+  virtual ~WebCryptoSHADigest();
+
+  bool Initialize(const WebKit::WebCryptoAlgorithm& algorithm);
+
+  virtual void process(const unsigned char* bytes, size_t size) OVERRIDE;
+  virtual void abort() OVERRIDE;
+  virtual void finish() OVERRIDE;
+
+ private:
+  WebKit::WebCryptoOperationResult result_;
+
+#if defined(USE_NSS)
+  HASHContext* context_;
+#endif
+
+  unsigned int hash_result_length_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_WEBCRYPTO_SHA_DIGEST_H_