aes_key.cpp revision 0629810b145187575bc26c910dded0d24c64569d
119fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden/* 219fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * Copyright 2014 The Android Open Source Project 319fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * 419fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * Licensed under the Apache License, Version 2.0 (the "License"); 519fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * you may not use this file except in compliance with the License. 619fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * You may obtain a copy of the License at 719fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * 819fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * http://www.apache.org/licenses/LICENSE-2.0 919fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * 1019fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * Unless required by applicable law or agreed to in writing, software 1119fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * distributed under the License is distributed on an "AS IS" BASIS, 1219fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1319fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * See the License for the specific language governing permissions and 1419fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden * limitations under the License. 1519fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden */ 1619fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden 1795e1382b75bab7d8b4cce3c1267fa23df2006957Shawn Willden#include "aes_key.h" 1895e1382b75bab7d8b4cce3c1267fa23df2006957Shawn Willden 19907c3015d0edf1e43cdc9e0bba0e3fc23dca8cfcShawn Willden#include <assert.h> 20907c3015d0edf1e43cdc9e0bba0e3fc23dca8cfcShawn Willden 2119fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden#include <openssl/err.h> 2219fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden#include <openssl/rand.h> 2319fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden 24907c3015d0edf1e43cdc9e0bba0e3fc23dca8cfcShawn Willden#include "aes_operation.h" 2519fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden 2619fca88879ffd9e02f068226df9e536aac4e4623Shawn Willdennamespace keymaster { 2719fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden 280629810b145187575bc26c910dded0d24c64569dShawn WilldenAesEncryptionOperationFactory encrypt_factory; 290629810b145187575bc26c910dded0d24c64569dShawn WilldenAesDecryptionOperationFactory decrypt_factory; 300629810b145187575bc26c910dded0d24c64569dShawn Willden 310629810b145187575bc26c910dded0d24c64569dShawn WilldenOperationFactory* AesKeyFactory::GetOperationFactory(keymaster_purpose_t purpose) const { 320629810b145187575bc26c910dded0d24c64569dShawn Willden switch (purpose) { 330629810b145187575bc26c910dded0d24c64569dShawn Willden case KM_PURPOSE_ENCRYPT: 340629810b145187575bc26c910dded0d24c64569dShawn Willden return &encrypt_factory; 350629810b145187575bc26c910dded0d24c64569dShawn Willden case KM_PURPOSE_DECRYPT: 360629810b145187575bc26c910dded0d24c64569dShawn Willden return &decrypt_factory; 370629810b145187575bc26c910dded0d24c64569dShawn Willden default: 380629810b145187575bc26c910dded0d24c64569dShawn Willden return nullptr; 390629810b145187575bc26c910dded0d24c64569dShawn Willden } 400629810b145187575bc26c910dded0d24c64569dShawn Willden} 410629810b145187575bc26c910dded0d24c64569dShawn Willden 420cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willdenkeymaster_error_t AesKeyFactory::LoadKey(const KeymasterKeyBlob& key_material, 430cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden const AuthorizationSet& hw_enforced, 440629810b145187575bc26c910dded0d24c64569dShawn Willden const AuthorizationSet& sw_enforced, 450629810b145187575bc26c910dded0d24c64569dShawn Willden UniquePtr<Key>* key) const { 460cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden if (!key) 470cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden return KM_ERROR_OUTPUT_PARAMETER_NULL; 480cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden 490cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden keymaster_error_t error = KM_ERROR_OK; 500cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden key->reset(new AesKey(key_material, hw_enforced, sw_enforced, &error)); 510cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden if (!key->get()) 520cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden error = KM_ERROR_MEMORY_ALLOCATION_FAILED; 530cb6942d3efb6c056f96321c82a4b3d86af601d6Shawn Willden return error; 54f923963fda888eac9e7997b71d5525ea2f82a091Shawn Willden} 55a278f6156b9e57e1de8ca380b14fef113ad10be8Shawn Willden 5619fca88879ffd9e02f068226df9e536aac4e4623Shawn Willden} // namespace keymaster 57