text: /*
   * Copyright (C) 2013 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   * THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "config.h"
  #include "CryptoAlgorithmRSASSA_PKCS1_v1_5.h"
  
  #if ENABLE(SUBTLE_CRYPTO)
  
  #include "CryptoAlgorithmRsaHashedImportParams.h"
  #include "CryptoAlgorithmRsaHashedKeyGenParams.h"
  #include "CryptoAlgorithmRsaKeyGenParamsDeprecated.h"
  #include "CryptoAlgorithmRsaKeyParamsWithHashDeprecated.h"
  #include "CryptoAlgorithmRsaSsaParamsDeprecated.h"
  #include "CryptoKeyDataRSAComponents.h"
  #include "CryptoKeyPair.h"
  #include "CryptoKeyRSA.h"
  #include <wtf/Variant.h>
  
  namespace WebCore {
  
  static const char* const ALG1 = "RS1";
  static const char* const ALG224 = "RS224";
  static const char* const ALG256 = "RS256";
  static const char* const ALG384 = "RS384";
  static const char* const ALG512 = "RS512";
  
  Ref<CryptoAlgorithm> CryptoAlgorithmRSASSA_PKCS1_v1_5::create()
  {
      return adoptRef(*new CryptoAlgorithmRSASSA_PKCS1_v1_5);
  }
  
  CryptoAlgorithmIdentifier CryptoAlgorithmRSASSA_PKCS1_v1_5::identifier() const
  {
      return s_identifier;
  }
  
  bool CryptoAlgorithmRSASSA_PKCS1_v1_5::keyAlgorithmMatches(const CryptoAlgorithmRsaSsaParamsDeprecated& algorithmParameters, const CryptoKey& key) const
  {
      if (key.algorithmIdentifier() != s_identifier)
          return false;
  
      CryptoAlgorithmIdentifier keyHash;
      if (downcast<CryptoKeyRSA>(key).isRestrictedToHash(keyHash) && keyHash != algorithmParameters.hash)
          return false;
  
      return true;
  }
  
  void CryptoAlgorithmRSASSA_PKCS1_v1_5::sign(std::unique_ptr<CryptoAlgorithmParameters>&&, Ref<CryptoKey>&& key, Vector<uint8_t>&& data, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
  {
      if (key->type() != CryptoKeyType::Private) {
          exceptionCallback(InvalidAccessError);
          return;
      }
      platformSign(WTFMove(key), WTFMove(data), WTFMove(callback), WTFMove(exceptionCallback), context, workQueue);
  }
  
  void CryptoAlgorithmRSASSA_PKCS1_v1_5::verify(std::unique_ptr<CryptoAlgorithmParameters>&&, Ref<CryptoKey>&& key, Vector<uint8_t>&& signature, Vector<uint8_t>&& data, BoolCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
  {
      if (key->type() != CryptoKeyType::Public) {
          exceptionCallback(InvalidAccessError);
          return;
      }
      platformVerify(WTFMove(key), WTFMove(signature), WTFMove(data), WTFMove(callback), WTFMove(exceptionCallback), context, workQueue);
  }
  
  void CryptoAlgorithmRSASSA_PKCS1_v1_5::generateKey(const CryptoAlgorithmParameters& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyOrKeyPairCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context)
  {
      const auto& rsaParameters = downcast<CryptoAlgorithmRsaHashedKeyGenParams>(parameters);
  
      if (usages & (CryptoKeyUsageDecrypt | CryptoKeyUsageEncrypt | CryptoKeyUsageDeriveKey | CryptoKeyUsageDeriveBits | CryptoKeyUsageWrapKey | CryptoKeyUsageUnwrapKey)) {
          exceptionCallback(SyntaxError);
          return;
      }
  
      auto keyPairCallback = [capturedCallback = WTFMove(callback)](CryptoKeyPair&& pair) {
          pair.publicKey->setUsagesBitmap(pair.publicKey->usagesBitmap() & CryptoKeyUsageVerify);
          pair.privateKey->setUsagesBitmap(pair.privateKey->usagesBitmap() & CryptoKeyUsageSign);
          capturedCallback(WTFMove(pair));
      };
      auto failureCallback = [capturedCallback = WTFMove(exceptionCallback)]() {
          capturedCallback(OperationError);
      };
      CryptoKeyRSA::generatePair(CryptoAlgorithmIdentifier::RSASSA_PKCS1_v1_5, rsaParameters.hashIdentifier, true, rsaParameters.modulusLength, rsaParameters.publicExponentVector(), extractable, usages, WTFMove(keyPairCallback), WTFMove(failureCallback), &context);
  }
  
  void CryptoAlgorithmRSASSA_PKCS1_v1_5::importKey(SubtleCrypto::KeyFormat format, KeyData&& data, const std::unique_ptr<CryptoAlgorithmParameters>&& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyCallback&& callback, ExceptionCallback&& exceptionCallback)
  {
      ASSERT(parameters);
      const auto& rsaParameters = downcast<CryptoAlgorithmRsaHashedImportParams>(*parameters);
  
      RefPtr<CryptoKeyRSA> result;
      switch (format) {
      case SubtleCrypto::KeyFormat::Jwk: {
          JsonWebKey key = WTFMove(WTF::get<JsonWebKey>(data));
  
          if (usages && ((!key.d.isNull() && (usages ^ CryptoKeyUsageSign)) || (key.d.isNull() && (usages ^ CryptoKeyUsageVerify)))) {
              exceptionCallback(SyntaxError);
              return;
          }
          if (usages && !key.use.isNull() && key.use != "sig") {
              exceptionCallback(DataError);
              return;
          }
  
          bool isMatched = false;
          switch (rsaParameters.hashIdentifier) {
          case CryptoAlgorithmIdentifier::SHA_1:
              isMatched = key.alg.isNull() || key.alg == ALG1;
              break;
          case CryptoAlgorithmIdentifier::SHA_224:
              isMatched = key.alg.isNull() || key.alg == ALG224;
              break;
          case CryptoAlgorithmIdentifier::SHA_256:
              isMatched = key.alg.isNull() || key.alg == ALG256;
              break;
          case CryptoAlgorithmIdentifier::SHA_384:
              isMatched = key.alg.isNull() || key.alg == ALG384;
              break;
          case CryptoAlgorithmIdentifier::SHA_512:
              isMatched = key.alg.isNull() || key.alg == ALG512;
              break;
          default:
              break;
          }
          if (!isMatched) {
              exceptionCallback(DataError);
              return;
          }
  
          result = CryptoKeyRSA::importJwk(rsaParameters.identifier, rsaParameters.hashIdentifier, WTFMove(key), extractable, usages);
          break;
      }
      case SubtleCrypto::KeyFormat::Spki: {
          if (usages && (usages ^ CryptoKeyUsageVerify)) {
              exceptionCallback(SyntaxError);
              return;
          }
          // FIXME: <webkit.org/b/165436>
          result = CryptoKeyRSA::importSpki(rsaParameters.identifier, rsaParameters.hashIdentifier, WTFMove(WTF::get<Vector<uint8_t>>(data)), extractable, usages);
          break;
      }
      case SubtleCrypto::KeyFormat::Pkcs8: {
          if (usages && (usages ^ CryptoKeyUsageSign)) {
              exceptionCallback(SyntaxError);
              return;
          }
          // FIXME: <webkit.org/b/165436>
          result = CryptoKeyRSA::importPkcs8(parameters->identifier, rsaParameters.hashIdentifier, WTFMove(WTF::get<Vector<uint8_t>>(data)), extractable, usages);
          break;
      }
      default:
          exceptionCallback(NotSupportedError);
          return;
      }
      if (!result) {
          exceptionCallback(DataError);
          return;
      }
  
      callback(*result);
  }
  
  void CryptoAlgorithmRSASSA_PKCS1_v1_5::exportKey(SubtleCrypto::KeyFormat format, Ref<CryptoKey>&& key, KeyDataCallback&& callback, ExceptionCallback&& exceptionCallback)
  {
      const auto& rsaKey = downcast<CryptoKeyRSA>(key.get());
  
      if (!rsaKey.keySizeInBits()) {
          exceptionCallback(OperationError);
          return;
      }
  
      KeyData result;
      switch (format) {
      case SubtleCrypto::KeyFormat::Jwk: {
          JsonWebKey jwk = rsaKey.exportJwk();
          switch (rsaKey.hashAlgorithmIdentifier()) {
          case CryptoAlgorithmIdentifier::SHA_1:
              jwk.alg = String(ALG1);
              break;
          case CryptoAlgorithmIdentifier::SHA_224:
              jwk.alg = String(ALG224);
              break;
          case CryptoAlgorithmIdentifier::SHA_256:
              jwk.alg = String(ALG256);
              break;
          case CryptoAlgorithmIdentifier::SHA_384:
              jwk.alg = String(ALG384);
              break;
          case CryptoAlgorithmIdentifier::SHA_512:
              jwk.alg = String(ALG512);
              break;
          default:
              ASSERT_NOT_REACHED();
          }
          result = WTFMove(jwk);
          break;
      }
      case SubtleCrypto::KeyFormat::Spki: {
          auto spki = rsaKey.exportSpki();
          if (spki.hasException()) {
              exceptionCallback(spki.releaseException().code());
              return;
          }
          result = spki.releaseReturnValue();
          break;
      }
      case SubtleCrypto::KeyFormat::Pkcs8: {
          auto pkcs8 = rsaKey.exportPkcs8();
          if (pkcs8.hasException()) {
              exceptionCallback(pkcs8.releaseException().code());
              return;
          }
          result = pkcs8.releaseReturnValue();
          break;
      }
      default:
          exceptionCallback(NotSupportedError);
          return;
      }
  
      callback(format, WTFMove(result));
  }
  
  ExceptionOr<void> CryptoAlgorithmRSASSA_PKCS1_v1_5::sign(const CryptoAlgorithmParametersDeprecated& parameters, const CryptoKey& key, const CryptoOperationData& data, VectorCallback&& callback, VoidCallback&& failureCallback)
  {
      auto& rsaSSAParameters = downcast<CryptoAlgorithmRsaSsaParamsDeprecated>(parameters);
      if (!keyAlgorithmMatches(rsaSSAParameters, key))
          return Exception { NotSupportedError };
      return platformSign(rsaSSAParameters, downcast<CryptoKeyRSA>(key), data, WTFMove(callback), WTFMove(failureCallback));
  }
  
  ExceptionOr<void> CryptoAlgorithmRSASSA_PKCS1_v1_5::verify(const CryptoAlgorithmParametersDeprecated& parameters, const CryptoKey& key, const CryptoOperationData& signature, const CryptoOperationData& data, BoolCallback&& callback, VoidCallback&& failureCallback)
  {
      auto& rsaSSAParameters = downcast<CryptoAlgorithmRsaSsaParamsDeprecated>(parameters);
      if (!keyAlgorithmMatches(rsaSSAParameters, key))
          return Exception { NotSupportedError };
      return platformVerify(rsaSSAParameters,  downcast<CryptoKeyRSA>(key), signature, data, WTFMove(callback), WTFMove(failureCallback));
  }
  
  ExceptionOr<void> CryptoAlgorithmRSASSA_PKCS1_v1_5::generateKey(const CryptoAlgorithmParametersDeprecated& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyOrKeyPairCallback&& callback, VoidCallback&& failureCallback, ScriptExecutionContext& context)
  {
      auto& rsaParameters = downcast<CryptoAlgorithmRsaKeyGenParamsDeprecated>(parameters);
      auto keyPairCallback = [capturedCallback = WTFMove(callback)](CryptoKeyPair&& pair) {
          capturedCallback(WTFMove(pair));
      };
      CryptoKeyRSA::generatePair(CryptoAlgorithmIdentifier::RSASSA_PKCS1_v1_5, rsaParameters.hash, rsaParameters.hasHash, rsaParameters.modulusLength, rsaParameters.publicExponent, extractable, usages, WTFMove(keyPairCallback), WTFMove(failureCallback), &context);
      return { };
  }
  
  ExceptionOr<void> CryptoAlgorithmRSASSA_PKCS1_v1_5::importKey(const CryptoAlgorithmParametersDeprecated& parameters, const CryptoKeyData& keyData, bool extractable, CryptoKeyUsageBitmap usage, KeyCallback&& callback, VoidCallback&& failureCallback)
  {
      auto& rsaKeyParameters = downcast<CryptoAlgorithmRsaKeyParamsWithHashDeprecated>(parameters);
      auto& rsaComponents = downcast<CryptoKeyDataRSAComponents>(keyData);
      auto result = CryptoKeyRSA::create(CryptoAlgorithmIdentifier::RSASSA_PKCS1_v1_5, rsaKeyParameters.hash, rsaKeyParameters.hasHash, rsaComponents, extractable, usage);
      if (!result) {
          failureCallback();
          return { };
      }
      callback(*result);
      return { };
  }
  
  }
  
  #endif // ENABLE(SUBTLE_CRYPTO)
  