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comparison: ipc/chromium/src/base/hmac_mac.cc
ipc/chromium/src/base/hmac_mac.cc
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| -1:000000000000 | 0:85d69b50cd08 |
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| 1 // Copyright (c) 2008 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 "base/hmac.h" | |
| 6 | |
| 7 #include <CommonCrypto/CommonHMAC.h> | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 | |
| 11 namespace base { | |
| 12 | |
| 13 struct HMACPlatformData { | |
| 14 std::string key_; | |
| 15 }; | |
| 16 | |
| 17 HMAC::HMAC(HashAlgorithm hash_alg) | |
| 18 : hash_alg_(hash_alg), plat_(new HMACPlatformData()) { | |
| 19 // Only SHA-1 digest is supported now. | |
| 20 DCHECK(hash_alg_ == SHA1); | |
| 21 } | |
| 22 | |
| 23 bool HMAC::Init(const unsigned char *key, int key_length) { | |
| 24 if (!plat_->key_.empty()) { | |
| 25 // Init must not be called more than once on the same HMAC object. | |
| 26 NOTREACHED(); | |
| 27 return false; | |
| 28 } | |
| 29 | |
| 30 plat_->key_.assign(reinterpret_cast<const char*>(key), key_length); | |
| 31 | |
| 32 return true; | |
| 33 } | |
| 34 | |
| 35 HMAC::~HMAC() { | |
| 36 // Zero out key copy. | |
| 37 plat_->key_.assign(plat_->key_.length(), std::string::value_type()); | |
| 38 plat_->key_.clear(); | |
| 39 plat_->key_.reserve(0); | |
| 40 } | |
| 41 | |
| 42 bool HMAC::Sign(const std::string& data, | |
| 43 unsigned char* digest, | |
| 44 int digest_length) { | |
| 45 CCHmacAlgorithm algorithm; | |
| 46 int algorithm_digest_length; | |
| 47 switch (hash_alg_) { | |
| 48 case SHA1: | |
| 49 algorithm = kCCHmacAlgSHA1; | |
| 50 algorithm_digest_length = CC_SHA1_DIGEST_LENGTH; | |
| 51 break; | |
| 52 default: | |
| 53 NOTREACHED(); | |
| 54 return false; | |
| 55 } | |
| 56 | |
| 57 if (digest_length < algorithm_digest_length) { | |
| 58 NOTREACHED(); | |
| 59 return false; | |
| 60 } | |
| 61 | |
| 62 CCHmac(algorithm, | |
| 63 plat_->key_.data(), plat_->key_.length(), data.data(), data.length(), | |
| 64 digest); | |
| 65 | |
| 66 return true; | |
| 67 } | |
| 68 | |
| 69 } // namespace base |
