| /* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| * |
| * Routines for verifying a kernel or disk image |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "2sysincludes.h" |
| #include "2api.h" |
| #include "2misc.h" |
| #include "2nvstorage.h" |
| #include "host_common.h" |
| #include "util_misc.h" |
| #include "vboot_common.h" |
| #include "vboot_api.h" |
| #include "vboot_kernel.h" |
| |
| static uint8_t *diskbuf; |
| |
| static uint8_t shared_data[VB_SHARED_DATA_MIN_SIZE]; |
| static VbSharedDataHeader *shared = (VbSharedDataHeader *)shared_data; |
| |
| static LoadKernelParams params; |
| |
| VbError_t VbExDiskRead(VbExDiskHandle_t handle, uint64_t lba_start, |
| uint64_t lba_count, void *buffer) |
| { |
| if (handle != (VbExDiskHandle_t)1) |
| return VBERROR_UNKNOWN; |
| if (lba_start >= params.streaming_lba_count) |
| return VBERROR_UNKNOWN; |
| if (lba_start + lba_count > params.streaming_lba_count) |
| return VBERROR_UNKNOWN; |
| |
| memcpy(buffer, diskbuf + lba_start * 512, lba_count * 512); |
| return VBERROR_SUCCESS; |
| } |
| |
| VbError_t VbExDiskWrite(VbExDiskHandle_t handle, uint64_t lba_start, |
| uint64_t lba_count, const void *buffer) |
| { |
| if (handle != (VbExDiskHandle_t)1) |
| return VBERROR_UNKNOWN; |
| if (lba_start >= params.streaming_lba_count) |
| return VBERROR_UNKNOWN; |
| if (lba_start + lba_count > params.streaming_lba_count) |
| return VBERROR_UNKNOWN; |
| |
| memcpy(diskbuf + lba_start * 512, buffer, lba_count * 512); |
| return VBERROR_SUCCESS; |
| } |
| |
| static void print_help(const char *progname) |
| { |
| printf("\nUsage: %s <disk_image> <kernel.vbpubk>\n\n", |
| progname); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| VbPublicKey *kernkey; |
| uint64_t disk_bytes = 0; |
| int rv; |
| |
| if (argc < 3) { |
| print_help(argv[0]); |
| return 1; |
| } |
| |
| /* Load disk file */ |
| /* TODO: is it better to mmap() in the long run? */ |
| diskbuf = ReadFile(argv[1], &disk_bytes); |
| if (!diskbuf) { |
| fprintf(stderr, "Can't read disk file %s\n", argv[1]); |
| return 1; |
| } |
| |
| /* Read public key */ |
| kernkey = (VbPublicKey *)vb2_read_packed_key(argv[2]); |
| if (!kernkey) { |
| fprintf(stderr, "Can't read key file %s\n", argv[2]); |
| return 1; |
| } |
| |
| /* Set up shared data blob */ |
| VbSharedDataInit(shared, sizeof(shared_data)); |
| VbSharedDataSetKernelKey(shared, kernkey); |
| /* TODO: optional TPM current kernel version */ |
| |
| /* Set up params */ |
| params.disk_handle = (VbExDiskHandle_t)1; |
| params.bytes_per_lba = 512; |
| params.streaming_lba_count = disk_bytes / 512; |
| params.gpt_lba_count = params.streaming_lba_count; |
| |
| params.kernel_buffer_size = 16 * 1024 * 1024; |
| params.kernel_buffer = malloc(params.kernel_buffer_size); |
| if (!params.kernel_buffer) { |
| fprintf(stderr, "Can't allocate kernel buffer\n"); |
| return 1; |
| } |
| |
| /* TODO(chromium:441893): support dev-mode flag and external gpt flag */ |
| params.boot_flags = 0; |
| |
| /* |
| * Set up vboot context. |
| * |
| * TODO: Propagate this up to higher API levels |
| */ |
| struct vb2_context ctx; |
| memset(&ctx, 0, sizeof(ctx)); |
| |
| /* TODO(chromium:441893): support dev-mode flag and external gpt flag */ |
| ctx.workbuf = malloc(VB2_KERNEL_WORKBUF_RECOMMENDED_SIZE); |
| if (!ctx.workbuf) { |
| fprintf(stderr, "Can't allocate workbuf\n"); |
| return 1; |
| } |
| ctx.workbuf_size = VB2_KERNEL_WORKBUF_RECOMMENDED_SIZE; |
| |
| if (VB2_SUCCESS != vb2_init_context(&ctx)) { |
| free(ctx.workbuf); |
| fprintf(stderr, "Can't init context\n"); |
| return 1; |
| } |
| |
| struct vb2_shared_data *sd = vb2_get_sd(&ctx); |
| sd->vbsd = shared; |
| |
| /* |
| * LoadKernel() cares only about VBNV_DEV_BOOT_SIGNED_ONLY, and only in |
| * dev mode. So just use defaults for nv storage. |
| */ |
| vb2_nv_init(&ctx); |
| |
| /* Try loading kernel */ |
| rv = LoadKernel(&ctx, ¶ms); |
| if (rv != VBERROR_SUCCESS) { |
| fprintf(stderr, "LoadKernel() failed with code %d\n", rv); |
| return 1; |
| } |
| |
| printf("Found a good kernel.\n"); |
| printf("Partition number: %u\n", params.partition_number); |
| printf("Bootloader address: 0x%" PRIx64 "\n", |
| params.bootloader_address); |
| |
| /* TODO: print other things (partition GUID, shared_data) */ |
| |
| printf("Yaay!\n"); |
| return 0; |
| } |