| /* |
| * Copyright 2015 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_KEYMASTER1_ENGINE_H_ |
| #define SYSTEM_KEYMASTER_KEYMASTER1_ENGINE_H_ |
| |
| #include <memory> |
| |
| #include <openssl/ec.h> |
| #include <openssl/engine.h> |
| #include <openssl/ex_data.h> |
| #include <openssl/rsa.h> |
| |
| #include <hardware/keymaster1.h> |
| #include <hardware/keymaster_defs.h> |
| |
| #include <keymaster/android_keymaster_utils.h> |
| #include <keymaster/authorization_set.h> |
| |
| #include "openssl_utils.h" |
| |
| namespace keymaster { |
| |
| class Keymaster1Engine { |
| public: |
| /** |
| * Create a Keymaster1Engine, wrapping the provided keymaster1_device. The engine takes |
| * ownership of the device, and will close it during destruction. |
| */ |
| explicit Keymaster1Engine(const keymaster1_device_t* keymaster1_device); |
| ~Keymaster1Engine(); |
| |
| keymaster_error_t GenerateKey(const AuthorizationSet& key_description, |
| KeymasterKeyBlob* key_material, AuthorizationSet* hw_enforced, |
| AuthorizationSet* sw_enforced) const; |
| |
| keymaster_error_t ImportKey(const AuthorizationSet& key_description, |
| keymaster_key_format_t input_key_material_format, |
| const KeymasterKeyBlob& input_key_material, |
| KeymasterKeyBlob* output_key_blob, AuthorizationSet* hw_enforced, |
| AuthorizationSet* sw_enforced) const; |
| keymaster_error_t DeleteKey(const KeymasterKeyBlob& blob) const; |
| keymaster_error_t DeleteAllKeys() const; |
| |
| struct KeyData { |
| KeyData(const KeymasterKeyBlob& blob, const AuthorizationSet& params) |
| : op_handle(0), begin_params(params), key_material(blob), error(KM_ERROR_OK), |
| expected_openssl_padding(-1) {} |
| |
| keymaster_operation_handle_t op_handle; |
| AuthorizationSet begin_params; |
| AuthorizationSet finish_params; |
| KeymasterKeyBlob key_material; |
| keymaster_error_t error; |
| int expected_openssl_padding; |
| }; |
| |
| RSA* BuildRsaKey(const KeymasterKeyBlob& blob, const AuthorizationSet& additional_params, |
| keymaster_error_t* error) const; |
| EC_KEY* BuildEcKey(const KeymasterKeyBlob& blob, const AuthorizationSet& additional_params, |
| keymaster_error_t* error) const; |
| |
| KeyData* GetData(EVP_PKEY* key) const; |
| KeyData* GetData(const RSA* rsa) const; |
| KeyData* GetData(const EC_KEY* rsa) const; |
| |
| const keymaster1_device_t* device() const { return keymaster1_device_; } |
| |
| EVP_PKEY* GetKeymaster1PublicKey(const KeymasterKeyBlob& blob, |
| const AuthorizationSet& additional_params, |
| keymaster_error_t* error) const; |
| |
| private: |
| Keymaster1Engine(const Keymaster1Engine&); // Uncopyable |
| void operator=(const Keymaster1Engine&); // Unassignable |
| |
| RSA_METHOD BuildRsaMethod(); |
| ECDSA_METHOD BuildEcdsaMethod(); |
| void ConfigureEngineForRsa(); |
| void ConfigureEngineForEcdsa(); |
| |
| keymaster_error_t Keymaster1Finish(const KeyData* key_data, const keymaster_blob_t& input, |
| keymaster_blob_t* output); |
| |
| static int duplicate_key_data(CRYPTO_EX_DATA* to, const CRYPTO_EX_DATA* from, void** from_d, |
| int index, long argl, void* argp); |
| static void free_key_data(void* parent, void* ptr, CRYPTO_EX_DATA* data, int index, long argl, |
| void* argp); |
| |
| static int rsa_sign_raw(RSA* rsa, size_t* out_len, uint8_t* out, size_t max_out, |
| const uint8_t* in, size_t in_len, int padding); |
| static int rsa_decrypt(RSA* rsa, size_t* out_len, uint8_t* out, size_t max_out, |
| const uint8_t* in, size_t in_len, int padding); |
| static int ecdsa_sign(const uint8_t* digest, size_t digest_len, uint8_t* sig, |
| unsigned int* sig_len, EC_KEY* ec_key); |
| |
| const keymaster1_device_t* const keymaster1_device_; |
| const std::unique_ptr<ENGINE, ENGINE_Delete> engine_; |
| const int rsa_index_; |
| const int ec_key_index_; |
| |
| const RSA_METHOD rsa_method_; |
| const ECDSA_METHOD ecdsa_method_; |
| |
| static Keymaster1Engine* instance_; |
| }; |
| |
| } // namespace keymaster |
| |
| #endif // SYSTEM_KEYMASTER_KEYMASTER1_ENGINE_H_ |