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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 <sechash.h> | |
| 6 #include <vector> | |
| 7 | |
| 8 #include "content/child/webcrypto/algorithm_implementation.h" | |
| 9 #include "content/child/webcrypto/crypto_data.h" | |
| 10 #include "content/child/webcrypto/nss/util_nss.h" | |
| 11 #include "content/child/webcrypto/status.h" | |
| 12 #include "content/child/webcrypto/webcrypto_util.h" | |
| 13 #include "crypto/nss_util.h" | |
| 14 #include "crypto/scoped_nss_types.h" | |
| 15 | |
| 16 namespace content { | |
| 17 | |
| 18 namespace webcrypto { | |
| 19 | |
| 20 namespace { | |
| 21 | |
| 22 HASH_HashType WebCryptoAlgorithmToNSSHashType( | |
| 23 blink::WebCryptoAlgorithmId algorithm) { | |
| 24 switch (algorithm) { | |
| 25 case blink::WebCryptoAlgorithmIdSha1: | |
| 26 return HASH_AlgSHA1; | |
| 27 case blink::WebCryptoAlgorithmIdSha256: | |
| 28 return HASH_AlgSHA256; | |
| 29 case blink::WebCryptoAlgorithmIdSha384: | |
| 30 return HASH_AlgSHA384; | |
| 31 case blink::WebCryptoAlgorithmIdSha512: | |
| 32 return HASH_AlgSHA512; | |
| 33 default: | |
| 34 // Not a digest algorithm. | |
| 35 return HASH_AlgNULL; | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 // Implementation of blink::WebCryptoDigester, an internal Blink detail not | |
| 40 // part of WebCrypto, that allows chunks of data to be streamed in before | |
| 41 // computing a SHA-* digest (as opposed to ShaImplementation, which computes | |
| 42 // digests over complete messages) | |
| 43 class DigestorNSS : public blink::WebCryptoDigestor { | |
| 44 public: | |
| 45 explicit DigestorNSS(blink::WebCryptoAlgorithmId algorithm_id) | |
| 46 : hash_context_(NULL), algorithm_id_(algorithm_id) {} | |
| 47 | |
| 48 virtual ~DigestorNSS() { | |
| 49 if (!hash_context_) | |
| 50 return; | |
| 51 | |
| 52 HASH_Destroy(hash_context_); | |
| 53 hash_context_ = NULL; | |
| 54 } | |
| 55 | |
| 56 virtual bool consume(const unsigned char* data, unsigned int size) { | |
| 57 return ConsumeWithStatus(data, size).IsSuccess(); | |
| 58 } | |
| 59 | |
| 60 Status ConsumeWithStatus(const unsigned char* data, unsigned int size) { | |
| 61 // Initialize everything if the object hasn't been initialized yet. | |
| 62 if (!hash_context_) { | |
| 63 Status error = Init(); | |
| 64 if (!error.IsSuccess()) | |
| 65 return error; | |
| 66 } | |
| 67 | |
| 68 HASH_Update(hash_context_, data, size); | |
| 69 | |
| 70 return Status::Success(); | |
| 71 } | |
| 72 | |
| 73 virtual bool finish(unsigned char*& result_data, | |
| 74 unsigned int& result_data_size) { | |
| 75 Status error = FinishInternal(result_, &result_data_size); | |
| 76 if (!error.IsSuccess()) | |
| 77 return false; | |
| 78 result_data = result_; | |
| 79 return true; | |
| 80 } | |
| 81 | |
| 82 Status FinishWithVectorAndStatus(std::vector<uint8>* result) { | |
| 83 if (!hash_context_) | |
| 84 return Status::ErrorUnexpected(); | |
| 85 | |
| 86 unsigned int result_length = HASH_ResultLenContext(hash_context_); | |
| 87 result->resize(result_length); | |
| 88 unsigned char* digest = Uint8VectorStart(result); | |
| 89 unsigned int digest_size; // ignored | |
| 90 return FinishInternal(digest, &digest_size); | |
| 91 } | |
| 92 | |
| 93 private: | |
| 94 Status Init() { | |
| 95 HASH_HashType hash_type = WebCryptoAlgorithmToNSSHashType(algorithm_id_); | |
| 96 | |
| 97 if (hash_type == HASH_AlgNULL) | |
| 98 return Status::ErrorUnsupported(); | |
| 99 | |
| 100 hash_context_ = HASH_Create(hash_type); | |
| 101 if (!hash_context_) | |
| 102 return Status::OperationError(); | |
| 103 | |
| 104 HASH_Begin(hash_context_); | |
| 105 | |
| 106 return Status::Success(); | |
| 107 } | |
| 108 | |
| 109 Status FinishInternal(unsigned char* result, unsigned int* result_size) { | |
| 110 if (!hash_context_) { | |
| 111 Status error = Init(); | |
| 112 if (!error.IsSuccess()) | |
| 113 return error; | |
| 114 } | |
| 115 | |
| 116 unsigned int hash_result_length = HASH_ResultLenContext(hash_context_); | |
| 117 DCHECK_LE(hash_result_length, static_cast<size_t>(HASH_LENGTH_MAX)); | |
| 118 | |
| 119 HASH_End(hash_context_, result, result_size, hash_result_length); | |
| 120 | |
| 121 if (*result_size != hash_result_length) | |
| 122 return Status::ErrorUnexpected(); | |
| 123 return Status::Success(); | |
| 124 } | |
| 125 | |
| 126 HASHContext* hash_context_; | |
| 127 blink::WebCryptoAlgorithmId algorithm_id_; | |
| 128 unsigned char result_[HASH_LENGTH_MAX]; | |
| 129 }; | |
| 130 | |
| 131 class ShaImplementation : public AlgorithmImplementation { | |
| 132 public: | |
| 133 virtual Status Digest(const blink::WebCryptoAlgorithm& algorithm, | |
| 134 const CryptoData& data, | |
| 135 std::vector<uint8>* buffer) const OVERRIDE { | |
| 136 DigestorNSS digestor(algorithm.id()); | |
| 137 Status error = digestor.ConsumeWithStatus(data.bytes(), data.byte_length()); | |
| 138 // http://crbug.com/366427: the spec does not define any other failures for | |
| 139 // digest, so none of the subsequent errors are spec compliant. | |
| 140 if (!error.IsSuccess()) | |
| 141 return error; | |
| 142 return digestor.FinishWithVectorAndStatus(buffer); | |
| 143 } | |
| 144 }; | |
| 145 | |
| 146 } // namespace | |
| 147 | |
| 148 AlgorithmImplementation* CreatePlatformShaImplementation() { | |
| 149 return new ShaImplementation(); | |
| 150 } | |
| 151 | |
| 152 scoped_ptr<blink::WebCryptoDigestor> CreatePlatformDigestor( | |
| 153 blink::WebCryptoAlgorithmId algorithm) { | |
| 154 return scoped_ptr<blink::WebCryptoDigestor>(new DigestorNSS(algorithm)); | |
| 155 } | |
| 156 | |
| 157 } // namespace webcrypto | |
| 158 | |
| 159 } // 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