Transfer WebCrypto databuffers across the Blink API using blink::WebVector.

third_party/WebKit/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 154 matching lines @@
     //     Blink thread.
     //
     //   * WebCryptoKey and WebCryptoAlgorithm ARE threadsafe. They can be
     //     safely copied between threads and accessed. Copying is cheap because
     //     they are internally reference counted.
     //
     // -----------------------
     // Inputs
     // -----------------------
     //
-    //   * Data buffers are passed as (basePointer, byteLength) pairs.
-    //     These buffers are only valid during the call itself. Asynchronous
-    //     implementations wishing to access it after the function returns
-    //     should make a copy.
+    //   * Data buffers are transfered as WebVectors. Implementations are free
+    //     to re-use or transfer their storage.
     //
     //   * All WebCryptoKeys are guaranteeed to be !isNull().
     //
     //   * All WebCryptoAlgorithms are guaranteed to be !isNull()
     //
     //   * Look to the Web Crypto spec for an explanation of the parameter. The
     //     method names here have a 1:1 correspondence with those of
     //     crypto.subtle, with the exception of "verify" which is here called
     //     "verifySignature".
     //
     // -----------------------
     // Guarantees on input validity
     // -----------------------
     //
     // Implementations MUST carefully sanitize algorithm inputs before using
     // them, as they come directly from the user. Few checks have been done on
     // algorithm parameters prior to passing to the embedder.
     //
     // Only the following checks can be assumed as having already passed:
     //
     //  * The key is extractable when calling into exportKey/wrapKey.
     //  * The key usages permit the operation being requested.
     //  * The key's algorithm matches that of the requested operation.
     //
-    virtual void encrypt(const WebCryptoAlgorithm&, const WebCryptoKey&, const unsigned char* data, unsigned dataSize, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
-    virtual void decrypt(const WebCryptoAlgorithm&, const WebCryptoKey&, const unsigned char* data, unsigned dataSize, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
-    virtual void sign(const WebCryptoAlgorithm&, const WebCryptoKey&, const unsigned char* data, unsigned dataSize, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
-    virtual void verifySignature(const WebCryptoAlgorithm&, const WebCryptoKey&, const unsigned char* signature, unsigned signatureSize, const unsigned char* data, unsigned dataSize, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
-    virtual void digest(const WebCryptoAlgorithm&, const unsigned char* data, unsigned dataSize, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
+    virtual void encrypt(const WebCryptoAlgorithm&, const WebCryptoKey&, WebVector<unsigned char> data, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
+    virtual void decrypt(const WebCryptoAlgorithm&, const WebCryptoKey&, WebVector<unsigned char> data, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
+    virtual void sign(const WebCryptoAlgorithm&, const WebCryptoKey&, WebVector<unsigned char> data, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
+    virtual void verifySignature(const WebCryptoAlgorithm&, const WebCryptoKey&, WebVector<unsigned char> signature, WebVector<unsigned char> data, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
+    virtual void digest(const WebCryptoAlgorithm&, WebVector<unsigned char> data, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
     virtual void generateKey(const WebCryptoAlgorithm&, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
-    virtual void importKey(WebCryptoKeyFormat, const unsigned char* keyData, unsigned keyDataSize, const WebCryptoAlgorithm&, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
+    virtual void importKey(WebCryptoKeyFormat, WebVector<unsigned char> keyData, const WebCryptoAlgorithm&, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
     virtual void exportKey(WebCryptoKeyFormat, const WebCryptoKey&, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
     virtual void wrapKey(WebCryptoKeyFormat, const WebCryptoKey& key, const WebCryptoKey& wrappingKey, const WebCryptoAlgorithm&, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
-    virtual void unwrapKey(WebCryptoKeyFormat, const unsigned char* wrappedKey, unsigned wrappedKeySize, const WebCryptoKey&, const WebCryptoAlgorithm& unwrapAlgorithm, const WebCryptoAlgorithm& unwrappedKeyAlgorithm, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
+    virtual void unwrapKey(WebCryptoKeyFormat, WebVector<unsigned char> wrappedKey, const WebCryptoKey&, const WebCryptoAlgorithm& unwrapAlgorithm, const WebCryptoAlgorithm& unwrappedKeyAlgorithm, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
     virtual void deriveBits(const WebCryptoAlgorithm&, const WebCryptoKey&, unsigned length, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
     virtual void deriveKey(const WebCryptoAlgorithm& algorithm, const WebCryptoKey& baseKey, const WebCryptoAlgorithm& importAlgorithm, const WebCryptoAlgorithm& keyLengthAlgorithm, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult result) { result.completeWithError(WebCryptoErrorTypeNotSupported, ""); }
 
     // This is the exception to the "Completing the request" guarantees
     // outlined above. This is useful for Blink internal crypto and is not part
     // of the WebCrypto standard. createDigestor must provide the result via
     // the WebCryptoDigestor object synchronously. This will never return null.
     virtual std::unique_ptr<WebCryptoDigestor> createDigestor(WebCryptoAlgorithmId algorithmId) { return nullptr; }
 
     // -----------------------
@@ skipping 44 matching lines @@
     // Returns true on success.
     virtual bool serializeKeyForClone(const WebCryptoKey&, WebVector<unsigned char>&) { return false; }
 
 protected:
     virtual ~WebCrypto() { }
 };
 
 } // namespace blink
 
 #endif // WebCrypto_h