components/webcrypto/algorithms/rsa_pss.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/webcrypto/algorithms/rsa.h"
   6 #include "components/webcrypto/algorithms/rsa_sign.h"
   7 #include "components/webcrypto/status.h"
   8 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h"
   9
  10 namespace webcrypto {
  11
  12 namespace {
  13
  14 class RsaPssImplementation : public RsaHashedAlgorithm {
  15  public:
  16   RsaPssImplementation()
  17       : RsaHashedAlgorithm(blink::WebCryptoKeyUsageVerify,
  18                            blink::WebCryptoKeyUsageSign) {}
  19
  20   const char* GetJwkAlgorithm(
  21       const blink::WebCryptoAlgorithmId hash) const override {
  22     switch (hash) {
  23       case blink::WebCryptoAlgorithmIdSha1:
  24         return "PS1";
  25       case blink::WebCryptoAlgorithmIdSha256:
  26         return "PS256";
  27       case blink::WebCryptoAlgorithmIdSha384:
  28         return "PS384";
  29       case blink::WebCryptoAlgorithmIdSha512:
  30         return "PS512";
  31       default:
  32         return NULL;
  33     }
  34   }
  35
  36   Status Sign(const blink::WebCryptoAlgorithm& algorithm,
  37               const blink::WebCryptoKey& key,
  38               const CryptoData& data,
  39               std::vector<uint8_t>* buffer) const override {
  40     return RsaSign(key, algorithm.rsaPssParams()->saltLengthBytes(), data,
  41                    buffer);
  42   }
  43
  44   Status Verify(const blink::WebCryptoAlgorithm& algorithm,
  45                 const blink::WebCryptoKey& key,
  46                 const CryptoData& signature,
  47                 const CryptoData& data,
  48                 bool* signature_match) const override {
  49     return RsaVerify(key, algorithm.rsaPssParams()->saltLengthBytes(),
  50                      signature, data, signature_match);
  51   }
  52 };
  53
  54 }  // namespace
  55
  56 scoped_ptr<AlgorithmImplementation> CreateRsaPssImplementation() {
  57   return make_scoped_ptr(new RsaPssImplementation);
  58 }
  59
  60 }  // namespace webcrypto