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