content/child/webcrypto/algorithm_registry.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 "content/child/webcrypto/algorithm_registry.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "content/child/webcrypto/algorithm_implementation.h"
   9 #include "content/child/webcrypto/platform_crypto.h"
  10 #include "content/child/webcrypto/status.h"
  11
  12 namespace content {
  13
  14 namespace webcrypto {
  15
  16 namespace {
  17
  18 // This class is used as a singleton. All methods must be threadsafe.
  19 class AlgorithmRegistry {
  20  public:
  21   AlgorithmRegistry()
  22       : sha_(CreatePlatformShaImplementation()),
  23         aes_gcm_(CreatePlatformAesGcmImplementation()),
  24         aes_cbc_(CreatePlatformAesCbcImplementation()),
  25         aes_ctr_(CreatePlatformAesCtrImplementation()),
  26         aes_kw_(CreatePlatformAesKwImplementation()),
  27         hmac_(CreatePlatformHmacImplementation()),
  28         rsa_ssa_(CreatePlatformRsaSsaImplementation()),
  29         rsa_oaep_(CreatePlatformRsaOaepImplementation()) {
  30     PlatformInit();
  31   }
  32
  33   const AlgorithmImplementation* GetAlgorithm(
  34       blink::WebCryptoAlgorithmId id) const {
  35     switch (id) {
  36       case blink::WebCryptoAlgorithmIdSha1:
  37       case blink::WebCryptoAlgorithmIdSha256:
  38       case blink::WebCryptoAlgorithmIdSha384:
  39       case blink::WebCryptoAlgorithmIdSha512:
  40         return sha_.get();
  41       case blink::WebCryptoAlgorithmIdAesGcm:
  42         return aes_gcm_.get();
  43       case blink::WebCryptoAlgorithmIdAesCbc:
  44         return aes_cbc_.get();
  45       case blink::WebCryptoAlgorithmIdAesCtr:
  46         return aes_ctr_.get();
  47       case blink::WebCryptoAlgorithmIdAesKw:
  48         return aes_kw_.get();
  49       case blink::WebCryptoAlgorithmIdHmac:
  50         return hmac_.get();
  51       case blink::WebCryptoAlgorithmIdRsaSsaPkcs1v1_5:
  52         return rsa_ssa_.get();
  53       case blink::WebCryptoAlgorithmIdRsaOaep:
  54         return rsa_oaep_.get();
  55       default:
  56         return NULL;
  57     }
  58   }
  59
  60  private:
  61   const scoped_ptr<AlgorithmImplementation> sha_;
  62   const scoped_ptr<AlgorithmImplementation> aes_gcm_;
  63   const scoped_ptr<AlgorithmImplementation> aes_cbc_;
  64   const scoped_ptr<AlgorithmImplementation> aes_ctr_;
  65   const scoped_ptr<AlgorithmImplementation> aes_kw_;
  66   const scoped_ptr<AlgorithmImplementation> hmac_;
  67   const scoped_ptr<AlgorithmImplementation> rsa_ssa_;
  68   const scoped_ptr<AlgorithmImplementation> rsa_oaep_;
  69 };
  70
  71 }  // namespace
  72
  73 base::LazyInstance<AlgorithmRegistry>::Leaky g_algorithm_registry =
  74     LAZY_INSTANCE_INITIALIZER;
  75
  76 Status GetAlgorithmImplementation(blink::WebCryptoAlgorithmId id,
  77                                   const AlgorithmImplementation** impl) {
  78   *impl = g_algorithm_registry.Get().GetAlgorithm(id);
  79   if (*impl)
  80     return Status::Success();
  81   return Status::ErrorUnsupported();
  82 }
  83
  84 }  // namespace webcrypto
  85
  86 }  // namespace content