forked from tink-crypto/tink
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Adding AES-CMAC to Tink's supported macs in C++.
PiperOrigin-RevId: 259600688
- Loading branch information
1 parent
fc0712e
commit 7a500ef
Showing
18 changed files
with
1,182 additions
and
2 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| // Copyright 2017 Google Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
| /////////////////////////////////////////////////////////////////////////////// | ||
|
|
||
| #include "tink/mac/aes_cmac_key_manager.h" | ||
|
|
||
| #include <map> | ||
|
|
||
| #include "absl/strings/string_view.h" | ||
| #include "tink/key_manager.h" | ||
| #include "tink/mac.h" | ||
| #include "tink/subtle/aes_cmac_boringssl.h" | ||
| #include "tink/subtle/random.h" | ||
| #include "tink/util/enums.h" | ||
| #include "tink/util/errors.h" | ||
| #include "tink/util/protobuf_helper.h" | ||
| #include "tink/util/status.h" | ||
| #include "tink/util/statusor.h" | ||
| #include "tink/util/validation.h" | ||
| #include "proto/aes_cmac.pb.h" | ||
| #include "proto/tink.pb.h" | ||
|
|
||
| namespace crypto { | ||
| namespace tink { | ||
|
|
||
| using crypto::tink::util::Enums; | ||
| using crypto::tink::util::Status; | ||
| using crypto::tink::util::StatusOr; | ||
| using google::crypto::tink::AesCmacKey; | ||
| using google::crypto::tink::AesCmacKeyFormat; | ||
| using google::crypto::tink::AesCmacParams; | ||
| using google::crypto::tink::KeyData; | ||
|
|
||
| constexpr uint32_t AesCmacKeyManager::kVersion; | ||
| // Due to https://www.math.uwaterloo.ca/~ajmeneze/publications/tightness.pdf, we | ||
| // only allow key sizes of 256 bit. | ||
| constexpr int kKeySizeInBytes = 32; | ||
| constexpr int kMaxTagSizeInBytes = 16; | ||
| constexpr int kMinTagSizeInBytes = 10; | ||
|
|
||
| class AesCmacKeyFactory : public KeyFactoryBase<AesCmacKey, AesCmacKeyFormat> { | ||
| public: | ||
| AesCmacKeyFactory() {} | ||
|
|
||
| KeyData::KeyMaterialType key_material_type() const override { | ||
| return KeyData::SYMMETRIC; | ||
| } | ||
|
|
||
| protected: | ||
| StatusOr<std::unique_ptr<AesCmacKey>> NewKeyFromFormat( | ||
| const AesCmacKeyFormat& cmac_key_format) const override; | ||
| }; | ||
|
|
||
| StatusOr<std::unique_ptr<AesCmacKey>> AesCmacKeyFactory::NewKeyFromFormat( | ||
| const AesCmacKeyFormat& cmac_key_format) const { | ||
| Status status = AesCmacKeyManager::Validate(cmac_key_format); | ||
| if (!status.ok()) return status; | ||
| auto cmac_key = absl::make_unique<AesCmacKey>(); | ||
| cmac_key->set_version(AesCmacKeyManager::kVersion); | ||
| cmac_key->set_key_value( | ||
| subtle::Random::GetRandomBytes(cmac_key_format.key_size())); | ||
| return absl::implicit_cast<StatusOr<std::unique_ptr<AesCmacKey>>>( | ||
| std::move(cmac_key)); | ||
| } | ||
|
|
||
| AesCmacKeyManager::AesCmacKeyManager() | ||
| : key_factory_(new AesCmacKeyFactory()) {} | ||
|
|
||
| uint32_t AesCmacKeyManager::get_version() const { return kVersion; } | ||
|
|
||
| const KeyFactory& AesCmacKeyManager::get_key_factory() const { | ||
| return *key_factory_; | ||
| } | ||
|
|
||
| StatusOr<std::unique_ptr<Mac>> AesCmacKeyManager::GetPrimitiveFromKey( | ||
| const AesCmacKey& cmac_key) const { | ||
| Status status = Validate(cmac_key); | ||
| if (!status.ok()) return status; | ||
| auto cmac_result = subtle::AesCmacBoringSsl::New( | ||
| cmac_key.key_value(), cmac_key.params().tag_size()); | ||
| if (!cmac_result.ok()) return cmac_result.status(); | ||
| return std::move(cmac_result.ValueOrDie()); | ||
| } | ||
|
|
||
| // static | ||
| Status AesCmacKeyManager::Validate(const AesCmacParams& params) { | ||
| if (params.tag_size() < kMinTagSizeInBytes) { | ||
| return ToStatusF(util::error::INVALID_ARGUMENT, | ||
| "Invalid AesCmacParams: tag_size %d is too small.", | ||
| params.tag_size()); | ||
| } | ||
| if (params.tag_size() > kMaxTagSizeInBytes) { | ||
| return ToStatusF(util::error::INVALID_ARGUMENT, | ||
| "Invalid AesCmacParams: tag_size %d is too big.", | ||
| params.tag_size()); | ||
| } | ||
| return Status::OK; | ||
| } | ||
|
|
||
| // static | ||
| Status AesCmacKeyManager::Validate(const AesCmacKey& key) { | ||
| Status status = ValidateVersion(key.version(), kVersion); | ||
| if (!status.ok()) return status; | ||
| if (key.key_value().size() != kKeySizeInBytes) { | ||
| return ToStatusF(util::error::INVALID_ARGUMENT, | ||
| "Invalid AesCmacKey: key_value wrong length."); | ||
| } | ||
| return Validate(key.params()); | ||
| } | ||
|
|
||
| // static | ||
| Status AesCmacKeyManager::Validate(const AesCmacKeyFormat& key_format) { | ||
| if (key_format.key_size() != kKeySizeInBytes) { | ||
| return ToStatusF(util::error::INVALID_ARGUMENT, | ||
| "Invalid AesCmacKeyFormat: invalid key_size."); | ||
| } | ||
| return Validate(key_format.params()); | ||
| } | ||
|
|
||
| } // namespace tink | ||
| } // namespace crypto |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| // Copyright 2017 Google Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
| /////////////////////////////////////////////////////////////////////////////// | ||
| #ifndef TINK_MAC_AES_CMAC_KEY_MANAGER_H_ | ||
| #define TINK_MAC_AES_CMAC_KEY_MANAGER_H_ | ||
|
|
||
| #include <algorithm> | ||
| #include <vector> | ||
|
|
||
| #include "absl/strings/string_view.h" | ||
| #include "tink/core/key_manager_base.h" | ||
| #include "tink/key_manager.h" | ||
| #include "tink/mac.h" | ||
| #include "tink/util/errors.h" | ||
| #include "tink/util/protobuf_helper.h" | ||
| #include "tink/util/status.h" | ||
| #include "tink/util/statusor.h" | ||
| #include "proto/aes_cmac.pb.h" | ||
| #include "proto/tink.pb.h" | ||
|
|
||
| namespace crypto { | ||
| namespace tink { | ||
|
|
||
| class AesCmacKeyManager | ||
| : public KeyManagerBase<Mac, google::crypto::tink::AesCmacKey> { | ||
| public: | ||
| static constexpr uint32_t kVersion = 0; | ||
|
|
||
| AesCmacKeyManager(); | ||
|
|
||
| // Returns the version of this key manager. | ||
| uint32_t get_version() const override; | ||
|
|
||
| // Returns a factory that generates keys of the key type | ||
| // handled by this manager. | ||
| const KeyFactory& get_key_factory() const override; | ||
|
|
||
| ~AesCmacKeyManager() override {} | ||
|
|
||
| protected: | ||
| crypto::tink::util::StatusOr<std::unique_ptr<Mac>> GetPrimitiveFromKey( | ||
| const google::crypto::tink::AesCmacKey& cmac_key) const override; | ||
|
|
||
| private: | ||
| friend class AesCmacKeyFactory; | ||
|
|
||
| std::unique_ptr<KeyFactory> key_factory_; | ||
|
|
||
| static crypto::tink::util::Status Validate( | ||
| const google::crypto::tink::AesCmacParams& params); | ||
| static crypto::tink::util::Status Validate( | ||
| const google::crypto::tink::AesCmacKey& key); | ||
| static crypto::tink::util::Status Validate( | ||
| const google::crypto::tink::AesCmacKeyFormat& key_format); | ||
| }; | ||
|
|
||
| } // namespace tink | ||
| } // namespace crypto | ||
|
|
||
| #endif // TINK_MAC_AES_CMAC_KEY_MANAGER_H_ |
Oops, something went wrong.