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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "modules/crypto/KeyOperation.h"
     33 
     34 #include "V8Key.h" // NOTE: This must appear before ScriptPromiseResolver to define toV8()
     35 #include "bindings/v8/ExceptionState.h"
     36 #include "bindings/v8/ScriptPromiseResolver.h"
     37 #include "core/dom/ExceptionCode.h"
     38 #include "modules/crypto/Key.h"
     39 
     40 namespace WebCore {
     41 
     42 PassRefPtr<KeyOperation> KeyOperation::create()
     43 {
     44     return adoptRef(new KeyOperation);
     45 }
     46 
     47 KeyOperation::KeyOperation()
     48     : m_state(Initializing)
     49     , m_impl(0)
     50     , m_initializationError(0)
     51 {
     52 }
     53 
     54 KeyOperation::~KeyOperation()
     55 {
     56     ASSERT(!m_impl);
     57 }
     58 
     59 void KeyOperation::initializationFailed()
     60 {
     61     ASSERT(m_state == Initializing);
     62     ASSERT(!m_impl);
     63 
     64     m_initializationError = NotSupportedError;
     65     m_state = Done;
     66 }
     67 
     68 void KeyOperation::initializationSucceeded(WebKit::WebCryptoKeyOperation* operationImpl)
     69 {
     70     ASSERT(m_state == Initializing);
     71     ASSERT(operationImpl);
     72     ASSERT(!m_impl);
     73 
     74     m_impl = operationImpl;
     75     m_state = InProgress;
     76 }
     77 
     78 void KeyOperation::completeWithError()
     79 {
     80     ASSERT(m_state == Initializing || m_state == InProgress);
     81 
     82     m_impl = 0;
     83     m_state = Done;
     84 
     85     promiseResolver()->reject(ScriptValue::createNull());
     86 }
     87 
     88 void KeyOperation::completeWithKey(const WebKit::WebCryptoKey& key)
     89 {
     90     ASSERT(m_state == Initializing || m_state == InProgress);
     91 
     92     m_impl = 0;
     93     m_state = Done;
     94 
     95     promiseResolver()->fulfill(Key::create(key));
     96 }
     97 
     98 void KeyOperation::ref()
     99 {
    100     ThreadSafeRefCounted<KeyOperation>::ref();
    101 }
    102 
    103 void KeyOperation::deref()
    104 {
    105     ThreadSafeRefCounted<KeyOperation>::deref();
    106 }
    107 
    108 ScriptObject KeyOperation::returnValue(ExceptionState& es)
    109 {
    110     ASSERT(m_state != Initializing);
    111 
    112     if (m_initializationError) {
    113         es.throwDOMException(m_initializationError);
    114         return ScriptObject();
    115     }
    116 
    117     return promiseResolver()->promise();
    118 }
    119 
    120 ScriptPromiseResolver* KeyOperation::promiseResolver()
    121 {
    122     if (!m_promiseResolver)
    123         m_promiseResolver = ScriptPromiseResolver::create();
    124     return m_promiseResolver.get();
    125 }
    126 
    127 } // namespace WebCore
    128