src/third_party/WebKit/Source/modules/crypto/CryptoResultImpl.cpp

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  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
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  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/DOMArrayBuffer.h"
  39 #include "core/dom/DOMError.h"
  40 #include "core/dom/DOMException.h"
  41 #include "core/dom/ExecutionContext.h"
  42 #include "modules/crypto/CryptoKey.h"
  43 #include "modules/crypto/NormalizeAlgorithm.h"
  44 #include "public/platform/Platform.h"
  45 #include "public/platform/WebArrayBuffer.h"
  46 #include "public/platform/WebCryptoAlgorithm.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(DOMArrayBuffer::create(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