Support for the new WebCrypto digest by chunks API.

content/child/webcrypto/shared_crypto_unittest.cc

Index: content/child/webcrypto/shared_crypto_unittest.cc
diff --git a/content/child/webcrypto/shared_crypto_unittest.cc b/content/child/webcrypto/shared_crypto_unittest.cc
index 821945fb800bb70c7cb84b27d7ae94dc29c70568..6f18fe6e8cc47cec2bb9f0bf0a662ecc2263ce23 100644
--- a/content/child/webcrypto/shared_crypto_unittest.cc
+++ b/content/child/webcrypto/shared_crypto_unittest.cc
@@ -649,6 +649,43 @@ TEST_F(SharedCryptoTest, DigestSampleSets) {
   }
 }
 
+TEST_F(SharedCryptoTest, DigestSampleSetsInChunks) {
+  scoped_ptr<base::ListValue> tests;
+  ASSERT_TRUE(ReadJsonTestFileToList("digest.json", &tests));
+
+  for (size_t test_index = 0; test_index < tests->GetSize(); ++test_index) {
+    SCOPED_TRACE(test_index);
+    base::DictionaryValue* test;
+    ASSERT_TRUE(tests->GetDictionary(test_index, &test));
+
+    blink::WebCryptoAlgorithm test_algorithm =
+        GetDigestAlgorithm(test, "algorithm");
+    std::vector<uint8> test_input = GetBytesFromHexString(test, "input");
+    std::vector<uint8> test_output = GetBytesFromHexString(test, "output");
+
+    // Test the chunk version of the digest functions. Test with 129 byte chunks
+    // because the SHA-512 chunk size is 128 bytes.
+    unsigned char* output;
+    unsigned int output_length;
+    static const size_t CHUNK_SIZE = 129;

[eroman, 2014/03/25 23:26:23]

kChunkSizeBytes

[jww, 2014/03/26 00:42:31]

Done.

+    size_t length = test_input.size();
+    scoped_ptr<blink::WebCryptoDigestor> digestor(
+        CreateDigestor(test_algorithm));
+    std::vector<uint8>::iterator begin = test_input.begin();
+    size_t chunk_index = 0;
+    while (begin != test_input.end()) {
+      size_t chunk_length = std::min(CHUNK_SIZE, length - chunk_index);
+      std::vector<uint8> chunk(begin, begin + chunk_length);
+      EXPECT_TRUE(digestor->consume(chunk.data(), chunk.size()));
+      chunk_index = chunk_index + chunk_length;
+      begin = begin + chunk_length;
+    }
+    EXPECT_TRUE(digestor->finish(output, output_length));
+    ExpectVectorMatches(test_output,
+                        std::vector<uint8>(output, output + output_length));
+  }
+}
+
 TEST_F(SharedCryptoTest, HMACSampleSets) {
   scoped_ptr<base::ListValue> tests;
   ASSERT_TRUE(ReadJsonTestFileToList("hmac.json", &tests));