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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/CryptoResultImpl.h"
     33 
     34 #include "bindings/core/v8/Dictionary.h"
     35 #include "bindings/core/v8/ScriptPromiseResolver.h"
     36 #include "bindings/core/v8/ScriptState.h"
     37 #include "core/dom/ContextLifecycleObserver.h"
     38 #include "core/dom/DOMError.h"
     39 #include "core/dom/DOMException.h"
     40 #include "core/dom/ExecutionContext.h"
     41 #include "modules/crypto/CryptoKey.h"
     42 #include "modules/crypto/NormalizeAlgorithm.h"
     43 #include "public/platform/Platform.h"
     44 #include "public/platform/WebArrayBuffer.h"
     45 #include "public/platform/WebCryptoAlgorithm.h"
     46 #include "wtf/ArrayBufferView.h"
     47 
     48 namespace blink {
     49 
     50 class CryptoResultImpl::WeakResolver : public ScriptPromiseResolver {
     51 public:
     52     static WeakPtr<ScriptPromiseResolver> create(ScriptState* scriptState, CryptoResultImpl* result)
     53     {
     54         RefPtr<WeakResolver> p = adoptRef(new WeakResolver(scriptState, result));
     55         p->suspendIfNeeded();
     56         p->keepAliveWhilePending();
     57         return p->m_weakPtrFactory.createWeakPtr();
     58     }
     59 
     60     virtual ~WeakResolver()
     61     {
     62         m_result->cancel();
     63     }
     64 
     65 private:
     66     WeakResolver(ScriptState* scriptState, CryptoResultImpl* result)
     67         : ScriptPromiseResolver(scriptState)
     68         , m_weakPtrFactory(this)
     69         , m_result(result) { }
     70     WeakPtrFactory<ScriptPromiseResolver> m_weakPtrFactory;
     71     RefPtr<CryptoResultImpl> m_result;
     72 };
     73 
     74 ExceptionCode webCryptoErrorToExceptionCode(WebCryptoErrorType errorType)
     75 {
     76     switch (errorType) {
     77     case WebCryptoErrorTypeNotSupported:
     78         return NotSupportedError;
     79     case WebCryptoErrorTypeSyntax:
     80         return SyntaxError;
     81     case WebCryptoErrorTypeInvalidState:
     82         return InvalidStateError;
     83     case WebCryptoErrorTypeInvalidAccess:
     84         return InvalidAccessError;
     85     case WebCryptoErrorTypeUnknown:
     86         return UnknownError;
     87     case WebCryptoErrorTypeData:
     88         return DataError;
     89     case WebCryptoErrorTypeOperation:
     90         return OperationError;
     91     case WebCryptoErrorTypeType:
     92         // FIXME: This should construct a TypeError instead. For now do
     93         //        something to facilitate refactor, but this will need to be
     94         //        revisited.
     95         return DataError;
     96     }
     97 
     98     ASSERT_NOT_REACHED();
     99     return 0;
    100 }
    101 
    102 CryptoResultImpl::~CryptoResultImpl()
    103 {
    104 }
    105 
    106 PassRefPtr<CryptoResultImpl> CryptoResultImpl::create(ScriptState* scriptState)
    107 {
    108     return adoptRef(new CryptoResultImpl(scriptState));
    109 }
    110 
    111 void CryptoResultImpl::completeWithError(WebCryptoErrorType errorType, const WebString& errorDetails)
    112 {
    113     if (m_resolver)
    114         m_resolver->reject(DOMException::create(webCryptoErrorToExceptionCode(errorType), errorDetails));
    115 }
    116 
    117 void CryptoResultImpl::completeWithBuffer(const WebArrayBuffer& buffer)
    118 {
    119     if (m_resolver)
    120         m_resolver->resolve(PassRefPtr<ArrayBuffer>(buffer));
    121 }
    122 
    123 void CryptoResultImpl::completeWithJson(const char* utf8Data, unsigned length)
    124 {
    125     if (m_resolver) {
    126         ScriptPromiseResolver* resolver = m_resolver.get();
    127         ScriptState* scriptState = resolver->scriptState();
    128         ScriptState::Scope scope(scriptState);
    129 
    130         v8::Handle<v8::String> jsonString = v8::String::NewFromUtf8(scriptState->isolate(), utf8Data, v8::String::kInternalizedString, length);
    131 
    132         v8::TryCatch exceptionCatcher;
    133         v8::Handle<v8::Value> jsonDictionary = v8::JSON::Parse(jsonString);
    134         if (exceptionCatcher.HasCaught() || jsonDictionary.IsEmpty()) {
    135             ASSERT_NOT_REACHED();
    136             resolver->reject(DOMException::create(OperationError, "Failed inflating JWK JSON to object"));
    137         } else {
    138             resolver->resolve(jsonDictionary);
    139         }
    140     }
    141 }
    142 
    143 void CryptoResultImpl::completeWithBoolean(bool b)
    144 {
    145     if (m_resolver)
    146         m_resolver->resolve(b);
    147 }
    148 
    149 void CryptoResultImpl::completeWithKey(const WebCryptoKey& key)
    150 {
    151     if (m_resolver)
    152         m_resolver->resolve(CryptoKey::create(key));
    153 }
    154 
    155 void CryptoResultImpl::completeWithKeyPair(const WebCryptoKey& publicKey, const WebCryptoKey& privateKey)
    156 {
    157     if (m_resolver) {
    158         ScriptState* scriptState = m_resolver->scriptState();
    159         ScriptState::Scope scope(scriptState);
    160 
    161         Dictionary keyPair = Dictionary::createEmpty(scriptState->isolate());
    162 
    163         v8::Handle<v8::Value> publicKeyValue = toV8NoInline(CryptoKey::create(publicKey), scriptState->context()->Global(), scriptState->isolate());
    164         v8::Handle<v8::Value> privateKeyValue = toV8NoInline(CryptoKey::create(privateKey), scriptState->context()->Global(), scriptState->isolate());
    165 
    166         keyPair.set("publicKey", publicKeyValue);
    167         keyPair.set("privateKey", privateKeyValue);
    168 
    169         m_resolver->resolve(keyPair.v8Value());
    170     }
    171 }
    172 
    173 bool CryptoResultImpl::cancelled() const
    174 {
    175     return acquireLoad(&m_cancelled);
    176 }
    177 
    178 void CryptoResultImpl::cancel()
    179 {
    180     releaseStore(&m_cancelled, 1);
    181 }
    182 
    183 CryptoResultImpl::CryptoResultImpl(ScriptState* scriptState)
    184     : m_cancelled(0)
    185 {
    186     // Creating the WeakResolver may return nullptr if active dom objects have
    187     // been stopped. And in the process set m_cancelled to 1.
    188     m_resolver = WeakResolver::create(scriptState, this);
    189 }
    190 
    191 ScriptPromise CryptoResultImpl::promise()
    192 {
    193     return m_resolver ? m_resolver->promise() : ScriptPromise();
    194 }
    195 
    196 } // namespace blink
    197