87c90e7b65
Bug: 175635923 Test: m MODULES-IN-system-core-trusty Change-Id: I7790dde8eba948cf95cb14dd2b436c3f6f88765a
284 lines
8 KiB
C++
284 lines
8 KiB
C++
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "TrustyAppLoader"
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#include <BufferAllocator/BufferAllocator.h>
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#include <android-base/logging.h>
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#include <android-base/unique_fd.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/sendfile.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <trusty/tipc.h>
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#include <unistd.h>
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#include <algorithm>
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#include <string>
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#include "apploader_ipc.h"
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using android::base::unique_fd;
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using std::string;
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constexpr const char kTrustyDefaultDeviceName[] = "/dev/trusty-ipc-dev0";
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static const char* dev_name = kTrustyDefaultDeviceName;
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static const char* _sopts = "hD:";
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static const struct option _lopts[] = {
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{"help", no_argument, 0, 'h'},
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{"dev", required_argument, 0, 'D'},
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{0, 0, 0, 0},
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};
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static const char* usage =
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"Usage: %s [options] package-file\n"
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"\n"
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"options:\n"
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" -h, --help prints this message and exit\n"
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" -D, --dev name Trusty device name\n"
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"\n";
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static void print_usage_and_exit(const char* prog, int code) {
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fprintf(stderr, usage, prog);
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exit(code);
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}
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static void parse_options(int argc, char** argv) {
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int c;
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int oidx = 0;
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while (1) {
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c = getopt_long(argc, argv, _sopts, _lopts, &oidx);
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if (c == -1) {
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break; /* done */
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}
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switch (c) {
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case 'h':
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print_usage_and_exit(argv[0], EXIT_SUCCESS);
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break;
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case 'D':
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dev_name = strdup(optarg);
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break;
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default:
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print_usage_and_exit(argv[0], EXIT_FAILURE);
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}
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}
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}
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static unique_fd read_file(const char* file_name, off64_t* out_file_size) {
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int rc;
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long page_size = sysconf(_SC_PAGESIZE);
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off64_t file_size, file_page_offset, file_page_size;
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struct stat64 st;
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unique_fd file_fd(TEMP_FAILURE_RETRY(open(file_name, O_RDONLY)));
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if (!file_fd.ok()) {
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PLOG(ERROR) << "Error opening file " << file_name;
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return {};
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}
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rc = fstat64(file_fd, &st);
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if (rc < 0) {
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PLOG(ERROR) << "Error calling stat on file '" << file_name << "'";
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return {};
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}
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assert(st.st_size >= 0);
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file_size = st.st_size;
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/* The dmabuf size needs to be a multiple of the page size */
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file_page_offset = file_size & (page_size - 1);
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if (file_page_offset) {
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file_page_offset = page_size - file_page_offset;
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}
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if (__builtin_add_overflow(file_size, file_page_offset, &file_page_size)) {
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LOG(ERROR) << "Failed to page-align file size";
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return {};
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}
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BufferAllocator alloc;
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unique_fd dmabuf_fd(alloc.Alloc(kDmabufSystemHeapName, file_page_size));
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if (!dmabuf_fd.ok()) {
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LOG(ERROR) << "Error creating dmabuf: " << dmabuf_fd.get();
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return dmabuf_fd;
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}
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void* shm = mmap(0, file_page_size, PROT_READ | PROT_WRITE, MAP_SHARED, dmabuf_fd, 0);
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if (shm == MAP_FAILED) {
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return {};
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}
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off64_t file_offset = 0;
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while (file_offset < file_size) {
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ssize_t num_read = TEMP_FAILURE_RETRY(
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pread(file_fd, (char*)shm + file_offset, file_size - file_offset, file_offset));
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if (num_read < 0) {
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PLOG(ERROR) << "Error reading package file '" << file_name << "'";
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break;
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}
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if (num_read == 0) {
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LOG(ERROR) << "Unexpected end of file '" << file_name << "'";
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break;
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}
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file_offset += (off64_t)num_read;
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}
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munmap(shm, file_page_size);
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if (file_offset < file_size) {
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return {};
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}
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assert(file_offset == file_size);
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if (out_file_size) {
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*out_file_size = file_size;
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}
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return dmabuf_fd;
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}
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static ssize_t send_load_message(int tipc_fd, int package_fd, off64_t package_size) {
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struct apploader_header hdr = {
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.cmd = APPLOADER_CMD_LOAD_APPLICATION,
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};
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struct apploader_load_app_req req = {
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.package_size = static_cast<uint64_t>(package_size),
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};
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struct iovec tx[2] = {{&hdr, sizeof(hdr)}, {&req, sizeof(req)}};
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struct trusty_shm shm = {
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.fd = package_fd,
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.transfer = TRUSTY_SHARE,
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};
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return tipc_send(tipc_fd, tx, 2, &shm, 1);
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}
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static ssize_t read_response(int tipc_fd) {
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struct apploader_resp resp;
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ssize_t rc = read(tipc_fd, &resp, sizeof(resp));
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if (rc < 0) {
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PLOG(ERROR) << "Failed to read response";
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return rc;
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}
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if (rc < sizeof(resp)) {
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LOG(ERROR) << "Not enough data in response: " << rc;
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return -EIO;
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}
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if (resp.hdr.cmd != (APPLOADER_CMD_LOAD_APPLICATION | APPLOADER_RESP_BIT)) {
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LOG(ERROR) << "Invalid command in response: " << resp.hdr.cmd;
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return -EINVAL;
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}
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switch (resp.error) {
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case APPLOADER_NO_ERROR:
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break;
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case APPLOADER_ERR_UNKNOWN_CMD:
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LOG(ERROR) << "Error: unknown command";
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break;
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case APPLOADER_ERR_INVALID_CMD:
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LOG(ERROR) << "Error: invalid command arguments";
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break;
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case APPLOADER_ERR_NO_MEMORY:
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LOG(ERROR) << "Error: out of Trusty memory";
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break;
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case APPLOADER_ERR_VERIFICATION_FAILED:
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LOG(ERROR) << "Error: failed to verify the package";
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break;
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case APPLOADER_ERR_LOADING_FAILED:
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LOG(ERROR) << "Error: failed to load the package";
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break;
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case APPLOADER_ERR_ALREADY_EXISTS:
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LOG(ERROR) << "Error: application already exists";
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break;
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case APPLOADER_ERR_INTERNAL:
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LOG(ERROR) << "Error: internal apploader error";
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break;
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case APPLOADER_ERR_INVALID_VERSION:
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LOG(ERROR) << "Error: invalid application version";
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break;
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case APPLOADER_ERR_POLICY_VIOLATION:
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LOG(ERROR) << "Error: loading denied by policy engine";
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break;
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case APPLOADER_ERR_NOT_ENCRYPTED:
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LOG(ERROR) << "Error: unmet application encryption requirement";
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break;
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default:
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LOG(ERROR) << "Unrecognized error: " << resp.error;
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break;
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}
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return static_cast<ssize_t>(resp.error);
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}
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static ssize_t send_app_package(const char* package_file_name) {
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ssize_t rc = 0;
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int tipc_fd = -1;
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off64_t package_size;
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unique_fd package_fd = read_file(package_file_name, &package_size);
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if (!package_fd.ok()) {
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rc = -1;
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goto err_read_file;
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}
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tipc_fd = tipc_connect(dev_name, APPLOADER_PORT);
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if (tipc_fd < 0) {
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LOG(ERROR) << "Failed to connect to Trusty app loader: " << strerror(-tipc_fd);
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// print this to stderr too to avoid silently exiting when run as non-root
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fprintf(stderr, "Failed to connect to Trusty app loader: %s\n", strerror(-tipc_fd));
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rc = tipc_fd;
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goto err_tipc_connect;
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}
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rc = send_load_message(tipc_fd, package_fd, package_size);
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if (rc < 0) {
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LOG(ERROR) << "Failed to send package: " << rc;
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goto err_send;
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}
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rc = read_response(tipc_fd);
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err_send:
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tipc_close(tipc_fd);
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err_tipc_connect:
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err_read_file:
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return rc;
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}
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int main(int argc, char** argv) {
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parse_options(argc, argv);
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if (optind + 1 != argc) {
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print_usage_and_exit(argv[0], EXIT_FAILURE);
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}
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int rc = send_app_package(argv[optind]);
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return rc == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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