From 2ac6aed46655ddfc6f5376253e5d1c9116d299bb Mon Sep 17 00:00:00 2001 From: David Drysdale Date: Mon, 9 Jan 2023 17:44:35 +0000 Subject: [PATCH] Helper for setting attestation IDs Useful for testing on unprovisioned devices, so that IDs match those expected by the VTS tests. Note that any attestation involving the values set as attestation IDs will only be signed by a fake key, and so will not be a valid attestation of anything. Bug: 258602662 Test: VtsAidlKeyMintTargetTest --gtest_filter="*NewKeyGenerationTest.EcdsaAttestationIdTags*default" Change-Id: Ic31e4f28ec3a2830ae12a794b2fa063944df2614 --- trusty/keymaster/Android.bp | 27 +++ .../set_attestation_ids.cpp | 162 ++++++++++++++++++ 2 files changed, 189 insertions(+) create mode 100644 trusty/keymaster/set_attestation_ids/set_attestation_ids.cpp diff --git a/trusty/keymaster/Android.bp b/trusty/keymaster/Android.bp index 31f0a7224..b249013ba 100644 --- a/trusty/keymaster/Android.bp +++ b/trusty/keymaster/Android.bp @@ -181,3 +181,30 @@ cc_binary { "-Werror", ], } + +cc_binary { + name: "trusty_keymaster_set_attestation_ids", + vendor: true, + + srcs: [ + "set_attestation_ids/set_attestation_ids.cpp", + "ipc/trusty_keymaster_ipc.cpp", + ], + + local_include_dirs: ["include"], + + shared_libs: [ + "libbase", + "libc", + "libcrypto", + "liblog", + "libtrusty", + "libhardware", + "libkeymaster_messages", + "libutils", + ], + cflags: [ + "-Wall", + "-Werror", + ], +} diff --git a/trusty/keymaster/set_attestation_ids/set_attestation_ids.cpp b/trusty/keymaster/set_attestation_ids/set_attestation_ids.cpp new file mode 100644 index 000000000..e944167fa --- /dev/null +++ b/trusty/keymaster/set_attestation_ids/set_attestation_ids.cpp @@ -0,0 +1,162 @@ +/* + * Copyright (C) 2020 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. + */ + +#include + +#include + +#include +#include + +namespace { + +const char* sopts = "hb:d:p:s:M:m:i:c:"; +const struct option lopts[] = { + {"help", no_argument, nullptr, 'h'}, + {"brand", required_argument, nullptr, 'b'}, + {"device", required_argument, nullptr, 'd'}, + {"product", required_argument, nullptr, 'p'}, + {"serial", required_argument, nullptr, 's'}, + {"manufacturer", required_argument, nullptr, 'M'}, + {"model", required_argument, nullptr, 'm'}, + {"imei", required_argument, nullptr, 'i'}, + {"meid", required_argument, nullptr, 'c'}, + {0, 0, 0, 0}, +}; + +std::string buf2string(const keymaster::Buffer& buf) { + return std::string(reinterpret_cast(buf.peek_read()), buf.available_read()); +} + +void print_usage(const char* prog, const keymaster::SetAttestationIdsRequest& req) { + fprintf(stderr, + "Usage: %s [options]\n" + "\n" + "options:\n" + " -h, --help prints this message and exit\n" + " -b, --brand set brand (default '%s')\n" + " -d, --device set device (default '%s')\n" + " -p, --product set product (default '%s')\n" + " -s, --serial set serial (default '%s')\n" + " -M, --manufacturer set manufacturer (default '%s')\n" + " -m, --model set model (default '%s')\n" + " -i, --imei set IMEI (default '%s')\n" + " -c, --meid set MEID (default '%s')\n" + "\n", + prog, buf2string(req.brand).c_str(), buf2string(req.device).c_str(), + buf2string(req.product).c_str(), buf2string(req.serial).c_str(), + buf2string(req.manufacturer).c_str(), buf2string(req.model).c_str(), + buf2string(req.imei).c_str(), buf2string(req.meid).c_str()); +} + +void set_from_prop(keymaster::Buffer* buf, const std::string& prop) { + std::string prop_value = ::android::base::GetProperty(prop, /* default_value = */ ""); + if (!prop_value.empty()) { + buf->Reinitialize(prop_value.data(), prop_value.size()); + } +} + +void populate_ids(keymaster::SetAttestationIdsRequest* req) { + set_from_prop(&req->brand, "ro.product.brand"); + set_from_prop(&req->device, "ro.product.device"); + set_from_prop(&req->product, "ro.product.name"); + set_from_prop(&req->serial, "ro.serialno"); + set_from_prop(&req->manufacturer, "ro.product.manufacturer"); + set_from_prop(&req->model, "ro.product.model"); +} + +} // namespace + +int main(int argc, char** argv) { + // By default, set attestation IDs to the values in userspace properties. + keymaster::SetAttestationIdsRequest req(/* ver = */ 4); + populate_ids(&req); + + while (true) { + int oidx = 0; + int c = getopt_long(argc, argv, sopts, lopts, &oidx); + if (c == -1) { + break; /* done */ + } + + switch (c) { + case 'b': + req.brand.Reinitialize(optarg, strlen(optarg)); + break; + case 'd': + req.device.Reinitialize(optarg, strlen(optarg)); + break; + case 'p': + req.product.Reinitialize(optarg, strlen(optarg)); + break; + case 's': + req.serial.Reinitialize(optarg, strlen(optarg)); + break; + case 'M': + req.manufacturer.Reinitialize(optarg, strlen(optarg)); + break; + case 'm': + req.model.Reinitialize(optarg, strlen(optarg)); + break; + case 'i': + req.imei.Reinitialize(optarg, strlen(optarg)); + break; + case 'c': + req.meid.Reinitialize(optarg, strlen(optarg)); + break; + case 'h': + print_usage(argv[0], req); + exit(EXIT_SUCCESS); + default: + print_usage(argv[0], req); + exit(EXIT_FAILURE); + } + } + if (optind != argc) { + print_usage(argv[0], req); + exit(EXIT_FAILURE); + } + + int ret = trusty_keymaster_connect(); + if (ret) { + fprintf(stderr, "trusty_keymaster_connect failed: %d\n", ret); + return EXIT_FAILURE; + } + + printf("Setting:\n" + " brand: %s\n" + " device: %s\n" + " product: %s\n" + " serial: %s\n" + " manufacturer: %s\n" + " model: %s\n" + " IMEI: %s\n" + " MEID: %s\n", + buf2string(req.brand).c_str(), buf2string(req.device).c_str(), + buf2string(req.product).c_str(), buf2string(req.serial).c_str(), + buf2string(req.manufacturer).c_str(), buf2string(req.model).c_str(), + buf2string(req.imei).c_str(), buf2string(req.meid).c_str()); + + keymaster::EmptyKeymasterResponse rsp(/* ver = */ 4); + ret = trusty_keymaster_send(KM_SET_ATTESTATION_IDS, req, &rsp); + if (ret) { + fprintf(stderr, "SET_ATTESTATION_IDS failed: %d\n", ret); + trusty_keymaster_disconnect(); + return EXIT_FAILURE; + } + + return EXIT_SUCCESS; +}