| /* |
| * Copyright 2014 The Android Open Source Project |
| * |
| * 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 SYSTEM_KEYMASTER_ECDSA_OPERATION_H_ |
| #define SYSTEM_KEYMASTER_ECDSA_OPERATION_H_ |
| |
| #include <openssl/ec.h> |
| #include <openssl/evp.h> |
| |
| #include <UniquePtr.h> |
| |
| #include "operation.h" |
| |
| namespace keymaster { |
| |
| class EcdsaOperation : public Operation { |
| public: |
| EcdsaOperation(keymaster_purpose_t purpose, keymaster_digest_t digest, EVP_PKEY* key) |
| : Operation(purpose), digest_(digest), ecdsa_key_(key) { |
| EVP_MD_CTX_init(&digest_ctx_); |
| } |
| ~EcdsaOperation(); |
| |
| keymaster_error_t Abort() override { return KM_ERROR_OK; } |
| |
| protected: |
| keymaster_error_t StoreData(const Buffer& input, size_t* input_consumed); |
| keymaster_error_t InitDigest(); |
| |
| keymaster_digest_t digest_; |
| const EVP_MD* digest_algorithm_; |
| EVP_PKEY* ecdsa_key_; |
| EVP_MD_CTX digest_ctx_; |
| Buffer data_; |
| }; |
| |
| class EcdsaSignOperation : public EcdsaOperation { |
| public: |
| EcdsaSignOperation(keymaster_digest_t digest, EVP_PKEY* key) |
| : EcdsaOperation(KM_PURPOSE_SIGN, digest, key) {} |
| keymaster_error_t Begin(const AuthorizationSet& input_params, |
| AuthorizationSet* output_params) override; |
| keymaster_error_t Update(const AuthorizationSet& additional_params, const Buffer& input, |
| AuthorizationSet* output_params, Buffer* output, |
| size_t* input_consumed) override; |
| keymaster_error_t Finish(const AuthorizationSet& additional_params, const Buffer& input, |
| const Buffer& signature, AuthorizationSet* output_params, |
| Buffer* output) override; |
| }; |
| |
| class EcdsaVerifyOperation : public EcdsaOperation { |
| public: |
| EcdsaVerifyOperation(keymaster_digest_t digest, EVP_PKEY* key) |
| : EcdsaOperation(KM_PURPOSE_VERIFY, digest, key) {} |
| keymaster_error_t Begin(const AuthorizationSet& input_params, |
| AuthorizationSet* output_params) override; |
| keymaster_error_t Update(const AuthorizationSet& additional_params, const Buffer& input, |
| AuthorizationSet* output_params, Buffer* output, |
| size_t* input_consumed) override; |
| keymaster_error_t Finish(const AuthorizationSet& additional_params, const Buffer& input, |
| const Buffer& signature, AuthorizationSet* output_params, |
| Buffer* output) override; |
| }; |
| |
| class EcdsaOperationFactory : public OperationFactory { |
| private: |
| KeyType registry_key() const override { return KeyType(KM_ALGORITHM_EC, purpose()); } |
| Operation* CreateOperation(const Key& key, const AuthorizationSet& begin_params, |
| keymaster_error_t* error) override; |
| const keymaster_digest_t* SupportedDigests(size_t* digest_count) const override; |
| |
| virtual keymaster_purpose_t purpose() const = 0; |
| virtual Operation* InstantiateOperation(keymaster_digest_t digest, EVP_PKEY* key) = 0; |
| }; |
| |
| class EcdsaSignOperationFactory : public EcdsaOperationFactory { |
| private: |
| keymaster_purpose_t purpose() const override { return KM_PURPOSE_SIGN; } |
| Operation* InstantiateOperation(keymaster_digest_t digest, EVP_PKEY* key) { |
| return new (std::nothrow) EcdsaSignOperation(digest, key); |
| } |
| }; |
| |
| class EcdsaVerifyOperationFactory : public EcdsaOperationFactory { |
| public: |
| keymaster_purpose_t purpose() const override { return KM_PURPOSE_VERIFY; } |
| Operation* InstantiateOperation(keymaster_digest_t digest, EVP_PKEY* key) { |
| return new (std::nothrow) EcdsaVerifyOperation(digest, key); |
| } |
| }; |
| |
| } // namespace keymaster |
| |
| #endif // SYSTEM_KEYMASTER_ECDSA_OPERATION_H_ |