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

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  30
  31 #include "config.h"
  32 #include "modules/crypto/SubtleCrypto.h"
  33
  34 #include "bindings/v8/Dictionary.h"
  35 #include "modules/crypto/CryptoResultImpl.h"
  36 #include "modules/crypto/Key.h"
  37 #include "modules/crypto/NormalizeAlgorithm.h"
  38 #include "public/platform/Platform.h"
  39 #include "public/platform/WebCrypto.h"
  40 #include "public/platform/WebCryptoAlgorithm.h"
  41 #include "wtf/ArrayBufferView.h"
  42
  43 namespace WebCore {
  44
  45 namespace {
  46
  47 // Seems like the generated bindings should take care of these however it
  48 // currently doesn't. See also http://crbug.com/264520
  49 bool ensureNotNull(const ArrayPiece& x, const char* paramName, CryptoResult* result)
  50 {
  51     if (x.isNull()) {
  52         String message = String("Invalid ") + paramName + String(" argument");
  53         result->completeWithError(blink::WebCryptoErrorTypeType, blink::WebString(message));
  54         return false;
  55     }
  56     return true;
  57 }
  58
  59 bool ensureNotNull(Key* key, const char* paramName, CryptoResult* result)
  60 {
  61     if (!key) {
  62         String message = String("Invalid ") + paramName + String(" argument");
  63         result->completeWithError(blink::WebCryptoErrorTypeType, blink::WebString(message));
  64         return false;
  65     }
  66     return true;
  67 }
  68
  69 ScriptPromise startCryptoOperation(const Dictionary& rawAlgorithm, Key* key, AlgorithmOperation operationType, const ArrayPiece& signature, const ArrayPiece& dataBuffer)
  70 {
  71     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
  72     ScriptPromise promise = result->promise();
  73
  74     bool requiresKey = operationType != Digest;
  75
  76     if (requiresKey && !ensureNotNull(key, "key", result.get()))
  77         return promise;
  78     if (operationType == Verify && !ensureNotNull(signature, "signature", result.get()))
  79         return promise;
  80     if (!ensureNotNull(dataBuffer, "dataBuffer", result.get()))
  81         return promise;
  82
  83     blink::WebCryptoAlgorithm algorithm;
  84     if (!parseAlgorithm(rawAlgorithm, operationType, algorithm, result.get()))
  85         return promise;
  86
  87     if (requiresKey && !key->canBeUsedForAlgorithm(algorithm, operationType, result.get()))
  88         return promise;
  89
  90     const unsigned char* data = dataBuffer.bytes();
  91     unsigned dataSize = dataBuffer.byteLength();
  92
  93     switch (operationType) {
  94     case Encrypt:
  95         blink::Platform::current()->crypto()->encrypt(algorithm, key->key(), data, dataSize, result->result());
  96         break;
  97     case Decrypt:
  98         blink::Platform::current()->crypto()->decrypt(algorithm, key->key(), data, dataSize, result->result());
  99         break;
 100     case Sign:
 101         blink::Platform::current()->crypto()->sign(algorithm, key->key(), data, dataSize, result->result());
 102         break;
 103     case Verify:
 104         blink::Platform::current()->crypto()->verifySignature(algorithm, key->key(), signature.bytes(), signature.byteLength(), data, dataSize, result->result());
 105         break;
 106     case Digest:
 107         blink::Platform::current()->crypto()->digest(algorithm, data, dataSize, result->result());
 108         break;
 109     default:
 110         ASSERT_NOT_REACHED();
 111         return ScriptPromise();
 112     }
 113
 114     return promise;
 115 }
 116
 117 } // namespace
 118
 119 SubtleCrypto::SubtleCrypto()
 120 {
 121     ScriptWrappable::init(this);
 122 }
 123
 124 ScriptPromise SubtleCrypto::encrypt(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& data)
 125 {
 126     return startCryptoOperation(rawAlgorithm, key, Encrypt, ArrayPiece(), data);
 127 }
 128
 129 ScriptPromise SubtleCrypto::decrypt(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& data)
 130 {
 131     return startCryptoOperation(rawAlgorithm, key, Decrypt, ArrayPiece(), data);
 132 }
 133
 134 ScriptPromise SubtleCrypto::sign(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& data)
 135 {
 136     return startCryptoOperation(rawAlgorithm, key, Sign, ArrayPiece(), data);
 137 }
 138
 139 ScriptPromise SubtleCrypto::verifySignature(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& signature, const ArrayPiece& data)
 140 {
 141     return startCryptoOperation(rawAlgorithm, key, Verify, signature, data);
 142 }
 143
 144 ScriptPromise SubtleCrypto::digest(const Dictionary& rawAlgorithm, const ArrayPiece& data)
 145 {
 146     return startCryptoOperation(rawAlgorithm, 0, Digest, ArrayPiece(), data);
 147 }
 148
 149 ScriptPromise SubtleCrypto::generateKey(const Dictionary& rawAlgorithm, bool extractable, const Vector<String>& rawKeyUsages)
 150 {
 151     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
 152     ScriptPromise promise = result->promise();
 153
 154     blink::WebCryptoKeyUsageMask keyUsages;
 155     if (!Key::parseUsageMask(rawKeyUsages, keyUsages, result.get()))
 156         return promise;
 157
 158     blink::WebCryptoAlgorithm algorithm;
 159     if (!parseAlgorithm(rawAlgorithm, GenerateKey, algorithm, result.get()))
 160         return promise;
 161
 162     blink::Platform::current()->crypto()->generateKey(algorithm, extractable, keyUsages, result->result());
 163     return promise;
 164 }
 165
 166 ScriptPromise SubtleCrypto::importKey(const String& rawFormat, const ArrayPiece& keyData, const Dictionary& rawAlgorithm, bool extractable, const Vector<String>& rawKeyUsages)
 167 {
 168     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
 169     ScriptPromise promise = result->promise();
 170
 171     if (!ensureNotNull(keyData, "keyData", result.get()))
 172         return promise;
 173
 174     blink::WebCryptoKeyFormat format;
 175     if (!Key::parseFormat(rawFormat, format, result.get()))
 176         return promise;
 177
 178     blink::WebCryptoKeyUsageMask keyUsages;
 179     if (!Key::parseUsageMask(rawKeyUsages, keyUsages, result.get()))
 180         return promise;
 181
 182     blink::WebCryptoAlgorithm algorithm;
 183     if (!parseAlgorithm(rawAlgorithm, ImportKey, algorithm, result.get()))
 184         return promise;
 185
 186     blink::Platform::current()->crypto()->importKey(format, keyData.bytes(), keyData.byteLength(), algorithm, extractable, keyUsages, result->result());
 187     return promise;
 188 }
 189
 190 ScriptPromise SubtleCrypto::exportKey(const String& rawFormat, Key* key)
 191 {
 192     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
 193     ScriptPromise promise = result->promise();
 194
 195     if (!ensureNotNull(key, "key", result.get()))
 196         return promise;
 197
 198     blink::WebCryptoKeyFormat format;
 199     if (!Key::parseFormat(rawFormat, format, result.get()))
 200         return promise;
 201
 202     if (!key->extractable()) {
 203         result->completeWithError(blink::WebCryptoErrorTypeInvalidAccess, "key is not extractable");
 204         return promise;
 205     }
 206
 207     blink::Platform::current()->crypto()->exportKey(format, key->key(), result->result());
 208     return promise;
 209 }
 210
 211 ScriptPromise SubtleCrypto::wrapKey(const String& rawFormat, Key* key, Key* wrappingKey, const Dictionary& rawWrapAlgorithm)
 212 {
 213     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
 214     ScriptPromise promise = result->promise();
 215
 216     if (!ensureNotNull(key, "key", result.get()))
 217         return promise;
 218
 219     if (!ensureNotNull(wrappingKey, "wrappingKey", result.get()))
 220         return promise;
 221
 222     blink::WebCryptoKeyFormat format;
 223     if (!Key::parseFormat(rawFormat, format, result.get()))
 224         return promise;
 225
 226     blink::WebCryptoAlgorithm wrapAlgorithm;
 227     if (!parseAlgorithm(rawWrapAlgorithm, WrapKey, wrapAlgorithm, result.get()))
 228         return promise;
 229
 230     if (!key->extractable()) {
 231         result->completeWithError(blink::WebCryptoErrorTypeInvalidAccess, "key is not extractable");
 232         return promise;
 233     }
 234
 235     if (!wrappingKey->canBeUsedForAlgorithm(wrapAlgorithm, WrapKey, result.get()))
 236         return promise;
 237
 238     blink::Platform::current()->crypto()->wrapKey(format, key->key(), wrappingKey->key(), wrapAlgorithm, result->result());
 239     return promise;
 240 }
 241
 242 ScriptPromise SubtleCrypto::unwrapKey(const String& rawFormat, const ArrayPiece& wrappedKey, Key* unwrappingKey, const Dictionary& rawUnwrapAlgorithm, const Dictionary& rawUnwrappedKeyAlgorithm, bool extractable, const Vector<String>& rawKeyUsages)
 243 {
 244     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
 245     ScriptPromise promise = result->promise();
 246
 247     if (!ensureNotNull(wrappedKey, "wrappedKey", result.get()))
 248         return promise;
 249     if (!ensureNotNull(unwrappingKey, "unwrappingKey", result.get()))
 250         return promise;
 251
 252     blink::WebCryptoKeyFormat format;
 253     if (!Key::parseFormat(rawFormat, format, result.get()))
 254         return promise;
 255
 256     blink::WebCryptoKeyUsageMask keyUsages;
 257     if (!Key::parseUsageMask(rawKeyUsages, keyUsages, result.get()))
 258         return promise;
 259
 260     blink::WebCryptoAlgorithm unwrapAlgorithm;
 261     if (!parseAlgorithm(rawUnwrapAlgorithm, UnwrapKey, unwrapAlgorithm, result.get()))
 262         return promise;
 263
 264     blink::WebCryptoAlgorithm unwrappedKeyAlgorithm;
 265     if (!parseAlgorithm(rawUnwrappedKeyAlgorithm, ImportKey, unwrappedKeyAlgorithm, result.get()))
 266         return promise;
 267
 268     if (!unwrappingKey->canBeUsedForAlgorithm(unwrapAlgorithm, UnwrapKey, result.get()))
 269         return promise;
 270
 271     blink::Platform::current()->crypto()->unwrapKey(format, wrappedKey.bytes(), wrappedKey.byteLength(), unwrappingKey->key(), unwrapAlgorithm, unwrappedKeyAlgorithm, extractable, keyUsages, result->result());
 272     return promise;
 273 }
 274
 275 } // namespace WebCore