WebCrypto: Implement digest() using NSS

content/renderer/webcrypto_impl_unittest.cc

+// 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.
+
+#include "webcrypto_impl.h"
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/strings/string_number_conversions.h"
+#include "content/public/renderer/content_renderer_client.h"
+#include "content/renderer/renderer_webkitplatformsupport_impl.h"
+#include "content/renderer/webcrypto_impl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/public/platform/WebArrayBuffer.h"
+#include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
+
+namespace content {
+
+// Algorithms include SHA1, SHA224, SHA256, SHA384, and SHA512

[eroman, 2013/08/22 02:25:05]

Delete this comment, doesn't explain anything extra about the code.

[Bryan Eyler, 2013/08/22 18:51:03]

Done.

+WebKit::WebCryptoAlgorithmId algorithm_ids[] = {

[eroman, 2013/08/22 02:25:05]

mark this "const", and rename algorithm_ids --> kAlgorithmIds

[Bryan Eyler, 2013/08/22 18:51:03]

Done.

+    WebKit::WebCryptoAlgorithmIdSha1,
+    WebKit::WebCryptoAlgorithmIdSha224,
+    WebKit::WebCryptoAlgorithmIdSha256,
+    WebKit::WebCryptoAlgorithmIdSha384,
+    WebKit::WebCryptoAlgorithmIdSha512
+};
+
+class TestWebCryptoResult
+    : public WebKit::WebCryptoResultPrivate,
+      public base::RefCountedThreadSafe<TestWebCryptoResult> {
+ public:
+  TestWebCryptoResult() : error_encountered_(false) {}
+
+  virtual void completeWithError() OVERRIDE {

[eroman, 2013/08/22 02:25:05]

I think it is better practice to omit OVERRIDE on interfaces defined in blink --
it allows refactoring the blink side without breaking chromium compile.

[jamesr, 2013/08/22 02:31:01]

no OVERRIDE for cross-repository overrides!

[Bryan Eyler, 2013/08/22 18:51:03]

Done.

+    error_encountered_ = true;
+  }
+
+  virtual void completeWithBuffer(
+      const WebKit::WebArrayBuffer& array_buffer) OVERRIDE {
+    // Might as well just store the array_buffer in hex, since it's going to be
+    // converted anyway for better error reporting.  +1 for the nul terminator.
+    array_buffer_data_hex_ =
+        base::HexEncode(array_buffer.data(), array_buffer.byteLength());
+  }
+
+  virtual void completeWithBoolean(bool boolean) OVERRIDE {
+    NOTREACHED();
+  }
+
+  virtual void completeWithKey(const WebKit::WebCryptoKey& key) OVERRIDE {
+    NOTREACHED();
+  }
+
+  virtual void ref() {
+    RefCountedThreadSafe<TestWebCryptoResult>::AddRef();

[jamesr, 2013/08/22 02:31:01]

these are a bit odd. what are they implementing?

[Bryan Eyler, 2013/08/22 18:51:03]

Ref counting as required in the WebCryptoResultPrivate abstract class.  I could
add comments about this being more typical of the WebKit objects?

+  }
+
+  virtual void deref() {
+    RefCountedThreadSafe<TestWebCryptoResult>::Release();
+  }
+
+  const char* array_buffer_data_hex() const {
+    return array_buffer_data_hex_.c_str();

[eroman, 2013/08/22 02:25:05]

how about returning a const std::string& instead?

[Bryan Eyler, 2013/08/22 18:51:03]

Done.

+  }
+
+  bool error_encountered() const {
+    return error_encountered_;
+  }
+
+ private:
+  friend class base::RefCountedThreadSafe<TestWebCryptoResult>;
+  virtual ~TestWebCryptoResult() {}
+
+  std::string array_buffer_data_hex_;
+  bool error_encountered_;
+};
+
+class WebCryptoImplTest : public testing::Test {
+ public:
+  WebCryptoImplTest() : crypto_(NULL) {}
+
+ protected:
+  virtual void SetUp() {
+    SetRendererClientForTesting(&content_renderer_client_);

[eroman, 2013/08/22 02:25:05]

Can you just directly instantiate the class under test? (i.e. new
WebCryptoImpl()).

[Bryan Eyler, 2013/08/22 18:51:03]

No, it doesn't link because the WebCryptoImpl class is not exported in the
content renderer.  Exporting the class makes this work, but previous CL comments
indicated that I should not be changing the content API.

+
+    webkit_platform_support_.reset(new RendererWebKitPlatformSupportImpl);
+
+    crypto_ = webkit_platform_support_->crypto();
+    ASSERT_TRUE(crypto_ != NULL);
+  }
+
+  virtual void TearDown() {
+    SetRendererClientForTesting(NULL);
+  }
+
+  ContentRendererClient content_renderer_client_;
+  scoped_ptr<RendererWebKitPlatformSupportImpl> webkit_platform_support_;
+  WebKit::WebCrypto* crypto_;
+};
+
+TEST_F(WebCryptoImplTest, DigestSampleSets) {
+  // For readability and maintainability of the results, the results are

[eroman, 2013/08/22 02:25:05]

nit: redundant use of the word results. Try:
For readability the results are stored as hex strings.

[Bryan Eyler, 2013/08/22 18:51:03]

Done.

+  // stored here in hex format.
+  //
+  // TODO(bryaneyler): Eventually, all these sample test sets should be replaced
+  // with the sets here: http://csrc.nist.gov/groups/STM/cavp/index.html#03
+  struct {
+    const char* input;
+    size_t input_length;
+    const char* hex_result[arraysize(algorithm_ids)];
+  } input_set[] = {
+    {
+      "", 0,
+      {
+        // echo -n "" | sha1sum
+        "da39a3ee5e6b4b0d3255bfef95601890afd80709",
+        // echo -n "" | sha224sum
+        "d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f",
+        // echo -n "" | sha256sum
+        "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        // echo -n "" | sha384sum
+        "38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274e"
+        "debfe76f65fbd51ad2f14898b95b",
+        // echo -n "" | sha512sum
+        "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0"
+        "d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e",
+      },
+    },
+    {
+      "\000", 1,
+      {
+        // echo -n -e "\000" | sha1sum
+        "5ba93c9db0cff93f52b521d7420e43f6eda2784f",
+        // echo -n -e "\000" | sha224sum
+        "fff9292b4201617bdc4d3053fce02734166a683d7d858a7f5f59b073",
+        // echo -n -e "\000" | sha256sum
+        "6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d",
+        // echo -n -e "\000" | sha384sum
+        "bec021b4f368e3069134e012c2b4307083d3a9bdd206e24e5f0d86e13d6636655933"
+        "ec2b413465966817a9c208a11717",
+        // echo -n -e "\000" | sha512sum
+        "b8244d028981d693af7b456af8efa4cad63d282e19ff14942c246e50d9351d22704a"
+        "802a71c3580b6370de4ceb293c324a8423342557d4e5c38438f0e36910ee",
+      },
+    },
+    {
+      "\000\001\002\003\004\005", 6,
+      {
+        // echo -n -e "\000\001\002\003\004\005" | sha1sum
+        "868460d98d09d8bbb93d7b6cdd15cc7fbec676b9",
+        // echo -n -e "\000\001\002\003\004\005" | sha224sum
+        "7d92e7f1cad1818ed1d13ab41f04ebabfe1fef6bb4cbeebac34c29bc",
+        // echo -n -e "\000\001\002\003\004\005" | sha256sum
+        "17e88db187afd62c16e5debf3e6527cd006bc012bc90b51a810cd80c2d511f43",
+        // echo -n -e "\000\001\002\003\004\005" | sha384sum
+        "79f4738706fce9650ac60266675c3cd07298b09923850d525604d040e6e448adc7dc"
+        "22780d7e1b95bfeaa86a678e4552",
+        // echo -n -e "\000\001\002\003\004\005" | sha512sum
+        "2f3831bccc94cf061bcfa5f8c23c1429d26e3bc6b76edad93d9025cb91c903af6cf9"
+        "c935dc37193c04c2c66e7d9de17c358284418218afea2160147aaa912f4c",
+      },
+    },
+  };
+
+  for (size_t id_index = 0; id_index < arraysize(algorithm_ids); id_index++) {
+    WebKit::WebCryptoAlgorithm algorithm(
+        WebKit::WebCryptoAlgorithm::adoptParamsAndCreate(
+            algorithm_ids[id_index], "SHA", NULL));
+
+    for (size_t set_index = 0;
+         set_index < ARRAYSIZE_UNSAFE(input_set); set_index++) {
+      scoped_refptr<TestWebCryptoResult> result_impl(
+          new TestWebCryptoResult);
+      WebKit::WebCryptoResult result(result_impl.get());
+
+      crypto_->digest(
+          algorithm,
+          reinterpret_cast<const unsigned char*>(input_set[set_index].input),
+          input_set[set_index].input_length,
+          result);
+
+      EXPECT_FALSE(result_impl->error_encountered());
+      // Ignore case, it's checking the hex value.
+      EXPECT_STRCASEEQ(
+          input_set[set_index].hex_result[id_index],
+          result_impl->array_buffer_data_hex());
+    }
+  }
+}
+
+}  // namespace content