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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
This commit is contained in:
David Drysdale 2023-01-09 17:44:35 +00:00
parent 3e3e5a609b
commit 2ac6aed466
2 changed files with 189 additions and 0 deletions
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27
trusty/keymaster/Android.bp
View File

@ -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",
],
}

162
trusty/keymaster/set_attestation_ids/set_attestation_ids.cpp Normal file
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@ -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 <getopt.h>
#include <string>
#include <android-base/properties.h>
#include <trusty_keymaster/ipc/trusty_keymaster_ipc.h>
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<const char*>(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 <val> set brand (default '%s')\n"
" -d, --device <val> set device (default '%s')\n"
" -p, --product <val> set product (default '%s')\n"
" -s, --serial <val> set serial (default '%s')\n"
" -M, --manufacturer <val> set manufacturer (default '%s')\n"
" -m, --model <val> set model (default '%s')\n"
" -i, --imei <val> set IMEI (default '%s')\n"
" -c, --meid <val> 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;
}