WebCrypto: Add SHA-1 support to crypto.subtle.digest().

Source/modules/crypto/SubtleCrypto.cpp

Index: Source/modules/crypto/SubtleCrypto.cpp
diff --git a/Source/modules/crypto/SubtleCrypto.cpp b/Source/modules/crypto/SubtleCrypto.cpp
index cf30ddd50fa4b77964f14a94c0749893c7d31525..ee6d07461ae1dafbd7b285a9e016ef75dd738a36 100644
--- a/Source/modules/crypto/SubtleCrypto.cpp
+++ b/Source/modules/crypto/SubtleCrypto.cpp
@@ -26,18 +26,70 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-
 #include "config.h"
 #include "modules/crypto/SubtleCrypto.h"
 
 #include "core/dom/ExceptionCode.h"
 #include "modules/crypto/CryptoOperation.h"
 #include "modules/crypto/NormalizeAlgorithm.h"
+#include "public/platform/WebArrayBuffer.h" // FIXME: temporary
+#include "public/platform/WebCrypto.h"
 #include "wtf/ArrayBuffer.h"
 #include "wtf/ArrayBufferView.h"
+#include "wtf/SHA1.h" // FIXME: temporary
+
 
 namespace WebCore {
 
+namespace {
+
+// FIXME: The following are temporary implementations of what *should* go on the
+//        embedder's side. Since SHA1 is easily implemented, this serves as
+//        a useful proof of concept to get layout tests up and running and
+//        returning correct results, until the embedder's side is implemented.
+//------------------------------------------------------------------------------
+class DummyOperation : public WebKit::WebCryptoOperation {
+public:
+    virtual void process(const unsigned char* bytes, size_t size) OVERRIDE
+    {
+        ASSERT_NOT_REACHED();
+    }
+    virtual void abort() OVERRIDE
+    {
+        delete this;
+    }
+    virtual void finish(WebKit::WebCryptoOperationResult* result) OVERRIDE
+    {
+        ASSERT_NOT_REACHED();
+    }
+};
+
+class MockSha1Operation : public DummyOperation {
+public:
+    virtual void process(const unsigned char* bytes, size_t size) OVERRIDE
+    {
+        m_sha1.addBytes(bytes, size);
+    }
+
+    virtual void finish(WebKit::WebCryptoOperationResult* result) OVERRIDE
+    {
+        Vector<uint8_t, 20> hash;
+        m_sha1.computeHash(hash);
+
+        WebKit::WebArrayBuffer buffer = WebKit::WebArrayBuffer::create(hash.size(), 1);
+        memcpy(buffer.data(), hash.data(), hash.size());
+
+        result->setArrayBuffer(buffer);
+        delete this;
+    }
+
+private:
+    SHA1 m_sha1;
+};
+//------------------------------------------------------------------------------
+
+} // namespace
+
 SubtleCrypto::SubtleCrypto()
 {
     ScriptWrappable::init(this);
@@ -48,7 +100,7 @@ PassRefPtr<CryptoOperation> SubtleCrypto::encrypt(const Dictionary& rawAlgorithm
     WebKit::WebCryptoAlgorithm algorithm;
     if (!normalizeAlgorithm(rawAlgorithm, Encrypt, algorithm, ec))
         return 0;
-    return CryptoOperation::create(algorithm);
+    return CryptoOperation::create(algorithm, new DummyOperation);
 }
 
 PassRefPtr<CryptoOperation> SubtleCrypto::decrypt(const Dictionary& rawAlgorithm, ExceptionCode& ec)
@@ -56,7 +108,7 @@ PassRefPtr<CryptoOperation> SubtleCrypto::decrypt(const Dictionary& rawAlgorithm
     WebKit::WebCryptoAlgorithm algorithm;
     if (!normalizeAlgorithm(rawAlgorithm, Decrypt, algorithm, ec))
         return 0;
-    return CryptoOperation::create(algorithm);
+    return CryptoOperation::create(algorithm, new DummyOperation);
 }
 
 PassRefPtr<CryptoOperation> SubtleCrypto::sign(const Dictionary& rawAlgorithm, ExceptionCode& ec)
@@ -64,7 +116,7 @@ PassRefPtr<CryptoOperation> SubtleCrypto::sign(const Dictionary& rawAlgorithm, E
     WebKit::WebCryptoAlgorithm algorithm;
     if (!normalizeAlgorithm(rawAlgorithm, Sign, algorithm, ec))
         return 0;
-    return CryptoOperation::create(algorithm);
+    return CryptoOperation::create(algorithm, new DummyOperation);
 }
 
 PassRefPtr<CryptoOperation> SubtleCrypto::verifySignature(const Dictionary& rawAlgorithm, ExceptionCode& ec)
@@ -72,7 +124,7 @@ PassRefPtr<CryptoOperation> SubtleCrypto::verifySignature(const Dictionary& rawA
     WebKit::WebCryptoAlgorithm algorithm;
     if (!normalizeAlgorithm(rawAlgorithm, Verify, algorithm, ec))
         return 0;
-    return CryptoOperation::create(algorithm);
+    return CryptoOperation::create(algorithm, new DummyOperation);
 }
 
 PassRefPtr<CryptoOperation> SubtleCrypto::digest(const Dictionary& rawAlgorithm, ExceptionCode& ec)
@@ -80,7 +132,12 @@ PassRefPtr<CryptoOperation> SubtleCrypto::digest(const Dictionary& rawAlgorithm,
     WebKit::WebCryptoAlgorithm algorithm;
     if (!normalizeAlgorithm(rawAlgorithm, Digest, algorithm, ec))
         return 0;
-    return CryptoOperation::create(algorithm);
+
+    // FIXME: Create the WebCryptoImplementation by calling out to
+    // Platform::crypto() instead.
+    WebKit::WebCryptoOperation* operationImpl = algorithm.id() == WebKit::WebCryptoAlgorithmIdSha1 ? new MockSha1Operation : new DummyOperation;
+
+    return CryptoOperation::create(algorithm, operationImpl);
 }
 
 } // namespace WebCore