WebCrypto: Add interfaces for importKey().

public/platform/WebCrypto.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebCrypto_h
 #define WebCrypto_h
 
 #include "WebCommon.h"
+#include "WebCryptoKey.h"
 
 namespace WebKit {
 
 class WebArrayBuffer;
-class WebCryptoAlgorithm;
-class WebCryptoKey;
+class WebCryptoKeyOperation;
+class WebCryptoKeyOperationResult;
 class WebCryptoOperation;
 class WebCryptoOperationResult;
 
 class WebCrypto {
 public:
     // FIXME: Deprecated, delete once chromium side is updated.
     virtual WebCryptoOperation* digest(const WebCryptoAlgorithm&) { return 0; }
 
     // The following methods begin an asynchronous multi-part cryptographic
     // operation.
     //
     // Let the WebCryptoOperationResult* be called "result".
     //
-    // Implementations can either:
+    // Before returning, implementations can either:
     //
     // * Synchronously fail initialization by calling:
     //   result->initializationFailed(errorDetails)
     //
     // OR
     //
     // * Create a new WebCryptoOperation* and return it by calling:
     //   result->initializationSucceeded(cryptoOperation)
     //
     // If initialization succeeds, then Blink will subsequently call
@@ skipping 14 matching lines @@
     //
     //   - Blink calls cryptoOperation->abort()
     //   OR
     //   - Embedder calls result->completeWithXXX()
     //
     // Once the cryptoOperation is no longer "in progress" the "result" pointer
     // is no longer valid. At this time the embedder is responsible for freeing
     // the cryptoOperation.
     virtual void digest(const WebCryptoAlgorithm&, WebCryptoOperationResult*) { }
 
+    // The following methods begin an asynchronous single-part key operation.
+    //
+    // Let the WebCryptoKeyOperationResult* be called "result".
+    //
+    // Before returning, implementations can either:
+    //
+    // (a) Synchronously fail initialization by calling:
+    //     result->initializationFailed(errorDetails)
+    //     (this results in throwing a Javascript exception)
+    //
+    // (b) Synchronously complete the request (success or error) by calling:
+    //     result->completeWithXXX()
+    //
+    // (c) Defer completion by calling
+    //     result->initializationSucceeded(keyOperation)
+    //
+    // If asynchronous completion (c) was chosen, then the embedder can notify
+    // completion after returning by calling result->completeWithXXX().
+    //
+    // The keyOperation pointer MUST remain valid while it is "in progress".
+    // The keyOperation is said to be "in progress" from the time after
+    // result->initializationSucceded() has been called, up until either:
+    //
+    //   - Blink calls keyOperation->abort()
+    //   OR
+    //   - Embedder calls result->completeWithXXX()
+    //
+    // Once the keyOperation is no longer "in progress" the "result" pointer
+    // is no longer valid. At this time the embedder is responsible for freeing
+    // the cryptoOperation.
+    virtual void importKey(WebCryptoKeyFormat, const unsigned char* keyData, size_t keyDataSize, const WebCryptoAlgorithm&, bool extractable, WebCryptoKeyUsageMask, WebCryptoKeyOperationResult*) { }
+
 protected:
     virtual ~WebCrypto() { }
 };
 
 class WebCryptoOperation {
 public:
     // Feeds data (bytes, size) to the operation.
     //   - |bytes| may be 0 if |size| is 0
     //   - |bytes| is valid only until process() returns
     //   - process() will not be called after abort() or finish()
@@ skipping 18 matching lines @@
     virtual void initializationSucceded(WebCryptoOperation*) = 0;
 
     // Only one of these should be called to set the result.
     virtual void completeWithError() = 0;
     virtual void completeWithArrayBuffer(const WebArrayBuffer&) = 0;
 
 protected:
     virtual ~WebCryptoOperationResult() { }
 };
 
+class WebCryptoKeyOperation {
+public:
+    // Cancels the in-progress operation.
+    //   * Implementations should delete |this| after aborting.
+    virtual void abort() = 0;
+
+protected:
+    virtual ~WebCryptoKeyOperation() { }
+};
+
+class WebCryptoKeyOperationResult {
+public:
+    virtual void initializationFailed() = 0;
+    virtual void initializationSucceeded(WebCryptoKeyOperation*) = 0;
+
+    virtual void completeWithError() = 0;
+    virtual void completeWithKey(const WebCryptoKey&) = 0;
+
+protected:
+    virtual ~WebCryptoKeyOperationResult() { }
+};
+
 } // namespace WebKit
 
 #endif