Shawn Willden | 6507c27 | 2016-01-05 22:51:48 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | #define LOG_TAG "keystore" |
| 18 | |
| 19 | #include "keystore_utils.h" |
| 20 | |
| 21 | #include <errno.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <cutils/log.h> |
| 26 | #include <private/android_filesystem_config.h> |
| 27 | |
| 28 | #include <keymaster/android_keymaster_utils.h> |
| 29 | |
| 30 | size_t readFully(int fd, uint8_t* data, size_t size) { |
| 31 | size_t remaining = size; |
| 32 | while (remaining > 0) { |
| 33 | ssize_t n = TEMP_FAILURE_RETRY(read(fd, data, remaining)); |
| 34 | if (n <= 0) { |
| 35 | return size - remaining; |
| 36 | } |
| 37 | data += n; |
| 38 | remaining -= n; |
| 39 | } |
| 40 | return size; |
| 41 | } |
| 42 | |
| 43 | size_t writeFully(int fd, uint8_t* data, size_t size) { |
| 44 | size_t remaining = size; |
| 45 | while (remaining > 0) { |
| 46 | ssize_t n = TEMP_FAILURE_RETRY(write(fd, data, remaining)); |
| 47 | if (n < 0) { |
| 48 | ALOGW("write failed: %s", strerror(errno)); |
| 49 | return size - remaining; |
| 50 | } |
| 51 | data += n; |
| 52 | remaining -= n; |
| 53 | } |
| 54 | return size; |
| 55 | } |
| 56 | |
| 57 | void add_legacy_key_authorizations(int keyType, std::vector<keymaster_key_param_t>* params) { |
| 58 | params->push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_SIGN)); |
| 59 | params->push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_VERIFY)); |
| 60 | params->push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_ENCRYPT)); |
| 61 | params->push_back(keymaster_param_enum(KM_TAG_PURPOSE, KM_PURPOSE_DECRYPT)); |
| 62 | params->push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_NONE)); |
| 63 | if (keyType == EVP_PKEY_RSA) { |
| 64 | params->push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_RSA_PKCS1_1_5_SIGN)); |
| 65 | params->push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_RSA_PKCS1_1_5_ENCRYPT)); |
| 66 | params->push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_RSA_PSS)); |
| 67 | params->push_back(keymaster_param_enum(KM_TAG_PADDING, KM_PAD_RSA_OAEP)); |
| 68 | } |
| 69 | params->push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_NONE)); |
| 70 | params->push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_MD5)); |
| 71 | params->push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_SHA1)); |
| 72 | params->push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_SHA_2_224)); |
| 73 | params->push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_SHA_2_256)); |
| 74 | params->push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_SHA_2_384)); |
| 75 | params->push_back(keymaster_param_enum(KM_TAG_DIGEST, KM_DIGEST_SHA_2_512)); |
| 76 | params->push_back(keymaster_param_bool(KM_TAG_ALL_USERS)); |
| 77 | params->push_back(keymaster_param_bool(KM_TAG_NO_AUTH_REQUIRED)); |
| 78 | params->push_back(keymaster_param_date(KM_TAG_ORIGINATION_EXPIRE_DATETIME, LLONG_MAX)); |
| 79 | params->push_back(keymaster_param_date(KM_TAG_USAGE_EXPIRE_DATETIME, LLONG_MAX)); |
| 80 | params->push_back(keymaster_param_date(KM_TAG_ACTIVE_DATETIME, 0)); |
| 81 | uint64_t now = keymaster::java_time(time(NULL)); |
| 82 | params->push_back(keymaster_param_date(KM_TAG_CREATION_DATETIME, now)); |
| 83 | } |
| 84 | |
| 85 | uid_t get_app_id(uid_t uid) { |
| 86 | return uid % AID_USER; |
| 87 | } |
| 88 | |
| 89 | uid_t get_user_id(uid_t uid) { |
| 90 | return uid / AID_USER; |
| 91 | } |