1 // Copyright 2017 Google Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 /////////////////////////////////////////////////////////////////////////////// 16 17 #ifndef TINK_SUBTLE_AES_CMAC_BORINGSSL_H_ 18 #define TINK_SUBTLE_AES_CMAC_BORINGSSL_H_ 19 20 #include <memory> 21 #include <string> 22 #include <utility> 23 24 #include "tink/internal/fips_utils.h" 25 #include "tink/mac.h" 26 #include "tink/util/secret_data.h" 27 #include "tink/util/statusor.h" 28 29 namespace crypto { 30 namespace tink { 31 namespace subtle { 32 33 class AesCmacBoringSsl : public Mac { 34 public: 35 static crypto::tink::util::StatusOr<std::unique_ptr<Mac>> New( 36 util::SecretData key, uint32_t tag_size); 37 38 // Computes and returns the CMAC for 'data'. 39 crypto::tink::util::StatusOr<std::string> ComputeMac( 40 absl::string_view data) const override; 41 42 // Verifies if 'mac' is a correct CMAC for 'data'. 43 // Returns Status::OK if 'mac' is correct, and a non-OK-Status otherwise. 44 crypto::tink::util::Status VerifyMac(absl::string_view mac, 45 absl::string_view data) const override; 46 47 static constexpr crypto::tink::internal::FipsCompatibility kFipsStatus = 48 crypto::tink::internal::FipsCompatibility::kNotFips; 49 50 private: AesCmacBoringSsl(util::SecretData key,uint32_t tag_size)51 AesCmacBoringSsl(util::SecretData key, uint32_t tag_size) 52 : key_(std::move(key)), tag_size_(tag_size) {} 53 54 const util::SecretData key_; 55 const uint32_t tag_size_; 56 }; 57 58 } // namespace subtle 59 } // namespace tink 60 } // namespace crypto 61 62 #endif // TINK_SUBTLE_AES_CMAC_BORINGSSL_H_ 63