1 /* 2 * Copyright 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <keymaster/asymmetric_key_factory.h> 18 19 #include <keymaster/android_keymaster_utils.h> 20 21 #include "asymmetric_key.h" 22 #include "openssl_err.h" 23 #include "openssl_utils.h" 24 25 namespace keymaster { 26 27 static const keymaster_key_format_t supported_import_formats[] = {KM_KEY_FORMAT_PKCS8}; 28 const keymaster_key_format_t* 29 AsymmetricKeyFactory::SupportedImportFormats(size_t* format_count) const { 30 *format_count = array_length(supported_import_formats); 31 return supported_import_formats; 32 } 33 34 static const keymaster_key_format_t supported_export_formats[] = {KM_KEY_FORMAT_X509}; 35 const keymaster_key_format_t* 36 AsymmetricKeyFactory::SupportedExportFormats(size_t* format_count) const { 37 *format_count = array_length(supported_export_formats); 38 return supported_export_formats; 39 } 40 41 keymaster_error_t AsymmetricKeyFactory::LoadKey(const KeymasterKeyBlob& key_material, 42 const AuthorizationSet& /* additional_params */, 43 const AuthorizationSet& hw_enforced, 44 const AuthorizationSet& sw_enforced, 45 UniquePtr<Key>* key) const { 46 UniquePtr<AsymmetricKey> asymmetric_key; 47 keymaster_error_t error = CreateEmptyKey(hw_enforced, sw_enforced, &asymmetric_key); 48 if (error != KM_ERROR_OK) 49 return error; 50 51 const uint8_t* tmp = key_material.key_material; 52 EVP_PKEY* pkey = 53 d2i_PrivateKey(evp_key_type(), NULL /* pkey */, &tmp, key_material.key_material_size); 54 if (!pkey) 55 return TranslateLastOpenSslError(); 56 UniquePtr<EVP_PKEY, EVP_PKEY_Delete> pkey_deleter(pkey); 57 58 if (!asymmetric_key->EvpToInternal(pkey)) 59 error = TranslateLastOpenSslError(); 60 else 61 key->reset(asymmetric_key.release()); 62 63 return error; 64 } 65 66 } // namespace keymaster 67
