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| 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 <vector> | |
| 6 #include <openssl/evp.h> | |
| 7 #include <openssl/sha.h> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "content/child/webcrypto/algorithm_implementation.h" | |
| 11 #include "content/child/webcrypto/crypto_data.h" | |
| 12 #include "content/child/webcrypto/openssl/util_openssl.h" | |
| 13 #include "content/child/webcrypto/status.h" | |
| 14 #include "content/child/webcrypto/webcrypto_util.h" | |
| 15 #include "crypto/openssl_util.h" | |
| 16 #include "crypto/scoped_openssl_types.h" | |
| 17 | |
| 18 namespace content { | |
| 19 | |
| 20 namespace webcrypto { | |
| 21 | |
| 22 namespace { | |
| 23 | |
| 24 // Implementation of blink::WebCryptoDigester, an internal Blink detail not | |
| 25 // part of WebCrypto, that allows chunks of data to be streamed in before | |
| 26 // computing a SHA-* digest (as opposed to ShaImplementation, which computes | |
| 27 // digests over complete messages) | |
| 28 class DigestorOpenSsl : public blink::WebCryptoDigestor { | |
| 29 public: | |
| 30 explicit DigestorOpenSsl(blink::WebCryptoAlgorithmId algorithm_id) | |
| 31 : initialized_(false), | |
| 32 digest_context_(EVP_MD_CTX_create()), | |
| 33 algorithm_id_(algorithm_id) {} | |
| 34 | |
| 35 virtual bool consume(const unsigned char* data, unsigned int size) { | |
| 36 return ConsumeWithStatus(data, size).IsSuccess(); | |
| 37 } | |
| 38 | |
| 39 Status ConsumeWithStatus(const unsigned char* data, unsigned int size) { | |
| 40 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 41 Status error = Init(); | |
| 42 if (!error.IsSuccess()) | |
| 43 return error; | |
| 44 | |
| 45 if (!EVP_DigestUpdate(digest_context_.get(), data, size)) | |
| 46 return Status::OperationError(); | |
| 47 | |
| 48 return Status::Success(); | |
| 49 } | |
| 50 | |
| 51 virtual bool finish(unsigned char*& result_data, | |
| 52 unsigned int& result_data_size) { | |
| 53 Status error = FinishInternal(result_, &result_data_size); | |
| 54 if (!error.IsSuccess()) | |
| 55 return false; | |
| 56 result_data = result_; | |
| 57 return true; | |
| 58 } | |
| 59 | |
| 60 Status FinishWithVectorAndStatus(std::vector<uint8>* result) { | |
| 61 const int hash_expected_size = EVP_MD_CTX_size(digest_context_.get()); | |
| 62 result->resize(hash_expected_size); | |
| 63 unsigned char* const hash_buffer = Uint8VectorStart(result); | |
| 64 unsigned int hash_buffer_size; // ignored | |
| 65 return FinishInternal(hash_buffer, &hash_buffer_size); | |
| 66 } | |
| 67 | |
| 68 private: | |
| 69 Status Init() { | |
| 70 if (initialized_) | |
| 71 return Status::Success(); | |
| 72 | |
| 73 const EVP_MD* digest_algorithm = GetDigest(algorithm_id_); | |
| 74 if (!digest_algorithm) | |
| 75 return Status::ErrorUnexpected(); | |
| 76 | |
| 77 if (!digest_context_.get()) | |
| 78 return Status::OperationError(); | |
| 79 | |
| 80 if (!EVP_DigestInit_ex(digest_context_.get(), digest_algorithm, NULL)) | |
| 81 return Status::OperationError(); | |
| 82 | |
| 83 initialized_ = true; | |
| 84 return Status::Success(); | |
| 85 } | |
| 86 | |
| 87 Status FinishInternal(unsigned char* result, unsigned int* result_size) { | |
| 88 crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE); | |
| 89 Status error = Init(); | |
| 90 if (!error.IsSuccess()) | |
| 91 return error; | |
| 92 | |
| 93 const int hash_expected_size = EVP_MD_CTX_size(digest_context_.get()); | |
| 94 if (hash_expected_size <= 0) | |
| 95 return Status::ErrorUnexpected(); | |
| 96 DCHECK_LE(hash_expected_size, EVP_MAX_MD_SIZE); | |
| 97 | |
| 98 if (!EVP_DigestFinal_ex(digest_context_.get(), result, result_size) || | |
| 99 static_cast<int>(*result_size) != hash_expected_size) | |
| 100 return Status::OperationError(); | |
| 101 | |
| 102 return Status::Success(); | |
| 103 } | |
| 104 | |
| 105 bool initialized_; | |
| 106 crypto::ScopedEVP_MD_CTX digest_context_; | |
| 107 blink::WebCryptoAlgorithmId algorithm_id_; | |
| 108 unsigned char result_[EVP_MAX_MD_SIZE]; | |
| 109 }; | |
| 110 | |
| 111 class ShaImplementation : public AlgorithmImplementation { | |
| 112 public: | |
| 113 virtual Status Digest(const blink::WebCryptoAlgorithm& algorithm, | |
| 114 const CryptoData& data, | |
| 115 std::vector<uint8>* buffer) const OVERRIDE { | |
| 116 DigestorOpenSsl digestor(algorithm.id()); | |
| 117 Status error = digestor.ConsumeWithStatus(data.bytes(), data.byte_length()); | |
| 118 // http://crbug.com/366427: the spec does not define any other failures for | |
| 119 // digest, so none of the subsequent errors are spec compliant. | |
| 120 if (!error.IsSuccess()) | |
| 121 return error; | |
| 122 return digestor.FinishWithVectorAndStatus(buffer); | |
| 123 } | |
| 124 }; | |
| 125 | |
| 126 } // namespace | |
| 127 | |
| 128 AlgorithmImplementation* CreatePlatformShaImplementation() { | |
| 129 return new ShaImplementation(); | |
| 130 } | |
| 131 | |
| 132 scoped_ptr<blink::WebCryptoDigestor> CreatePlatformDigestor( | |
| 133 blink::WebCryptoAlgorithmId algorithm) { | |
| 134 return scoped_ptr<blink::WebCryptoDigestor>(new DigestorOpenSsl(algorithm)); | |
| 135 } | |
| 136 | |
| 137 } // namespace webcrypto | |
| 138 | |
| 139 } // namespace content | |
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Chromium Code Reviews
Issue 401983002:
Revert 284192 due to a failing test. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src