| /* |
| * Copyright (C) 2016 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. |
| */ |
| |
| #define LOG_TAG "keystore" |
| |
| #include "keystore_utils.h" |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <cutils/log.h> |
| #include <private/android_filesystem_config.h> |
| |
| #include <keystore/authorization_set.h> |
| #include <keystore/keystore_client.h> |
| size_t readFully(int fd, uint8_t* data, size_t size) { |
| size_t remaining = size; |
| while (remaining > 0) { |
| ssize_t n = TEMP_FAILURE_RETRY(read(fd, data, remaining)); |
| if (n <= 0) { |
| return size - remaining; |
| } |
| data += n; |
| remaining -= n; |
| } |
| return size; |
| } |
| |
| size_t writeFully(int fd, uint8_t* data, size_t size) { |
| size_t remaining = size; |
| while (remaining > 0) { |
| ssize_t n = TEMP_FAILURE_RETRY(write(fd, data, remaining)); |
| if (n < 0) { |
| ALOGW("write failed: %s", strerror(errno)); |
| return size - remaining; |
| } |
| data += n; |
| remaining -= n; |
| } |
| if (TEMP_FAILURE_RETRY(fsync(fd)) == -1) { |
| ALOGW("fsync failed: %s", strerror(errno)); |
| return -1; |
| } |
| return size; |
| } |
| |
| void add_legacy_key_authorizations(int keyType, keystore::AuthorizationSet* params) { |
| using namespace keystore; |
| params->push_back(TAG_PURPOSE, KeyPurpose::SIGN); |
| params->push_back(TAG_PURPOSE, KeyPurpose::VERIFY); |
| params->push_back(TAG_PURPOSE, KeyPurpose::ENCRYPT); |
| params->push_back(TAG_PURPOSE, KeyPurpose::DECRYPT); |
| params->push_back(TAG_PADDING, PaddingMode::NONE); |
| if (keyType == EVP_PKEY_RSA) { |
| params->push_back(TAG_PADDING, PaddingMode::RSA_PKCS1_1_5_SIGN); |
| params->push_back(TAG_PADDING, PaddingMode::RSA_PKCS1_1_5_ENCRYPT); |
| params->push_back(TAG_PADDING, PaddingMode::RSA_PSS); |
| params->push_back(TAG_PADDING, PaddingMode::RSA_OAEP); |
| } |
| params->push_back(TAG_DIGEST, Digest::NONE); |
| params->push_back(TAG_DIGEST, Digest::MD5); |
| params->push_back(TAG_DIGEST, Digest::SHA1); |
| params->push_back(TAG_DIGEST, Digest::SHA_2_224); |
| params->push_back(TAG_DIGEST, Digest::SHA_2_256); |
| params->push_back(TAG_DIGEST, Digest::SHA_2_384); |
| params->push_back(TAG_DIGEST, Digest::SHA_2_512); |
| params->push_back(TAG_NO_AUTH_REQUIRED); |
| params->push_back(TAG_ORIGINATION_EXPIRE_DATETIME, LLONG_MAX); |
| params->push_back(TAG_USAGE_EXPIRE_DATETIME, LLONG_MAX); |
| params->push_back(TAG_ACTIVE_DATETIME, 0); |
| } |
| |
| uid_t get_app_id(uid_t uid) { |
| return uid % AID_USER; |
| } |
| |
| uid_t get_user_id(uid_t uid) { |
| return uid / AID_USER; |
| } |