mirror of
https://github.com/AsahiLinux/u-boot
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2eda55e4c9
While building a capsule, the GUID value of that specific image is to be passed through the --guid command option to the mkeficapsule tool instead of using one of --raw or --fit options, where the GUID value passed through the command line option is the image GUID. This renders the EFI_FIRMWARE_IMAGE_TYPE_UBOOT_FIT_GUID and EFI_FIRMWARE_IMAGE_TYPE_UBOOT_RAW_GUID values superfluous. Remove the --raw and --fit command line options as well. Also modify the mkeficapsule man page to reflect this change. Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
663 lines
16 KiB
C
663 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2018 Linaro Limited
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* Author: AKASHI Takahiro
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*/
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#include <getopt.h>
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#include <pe.h>
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#include <stdbool.h>
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#include <stdint.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 <linux/types.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <uuid/uuid.h>
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#include <linux/kconfig.h>
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#include <gnutls/gnutls.h>
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#include <gnutls/pkcs7.h>
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#include <gnutls/abstract.h>
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#include "eficapsule.h"
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static const char *tool_name = "mkeficapsule";
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efi_guid_t efi_guid_fm_capsule = EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID;
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efi_guid_t efi_guid_cert_type_pkcs7 = EFI_CERT_TYPE_PKCS7_GUID;
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static const char *opts_short = "g:i:I:v:p:c:m:dh";
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static struct option options[] = {
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{"guid", required_argument, NULL, 'g'},
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{"index", required_argument, NULL, 'i'},
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{"instance", required_argument, NULL, 'I'},
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{"private-key", required_argument, NULL, 'p'},
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{"certificate", required_argument, NULL, 'c'},
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{"monotonic-count", required_argument, NULL, 'm'},
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{"dump-sig", no_argument, NULL, 'd'},
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{"help", no_argument, NULL, 'h'},
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{NULL, 0, NULL, 0},
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};
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static void print_usage(void)
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{
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fprintf(stderr, "Usage: %s [options] <image blob> <output file>\n"
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"Options:\n"
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"\t-g, --guid <guid string> guid for image blob type\n"
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"\t-i, --index <index> update image index\n"
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"\t-I, --instance <instance> update hardware instance\n"
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"\t-p, --private-key <privkey file> private key file\n"
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"\t-c, --certificate <cert file> signer's certificate file\n"
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"\t-m, --monotonic-count <count> monotonic count\n"
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"\t-d, --dump_sig dump signature (*.p7)\n"
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"\t-h, --help print a help message\n",
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tool_name);
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}
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/**
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* auth_context - authentication context
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* @key_file: Path to a private key file
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* @cert_file: Path to a certificate file
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* @image_data: Pointer to firmware data
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* @image_size: Size of firmware data
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* @auth: Authentication header
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* @sig_data: Signature data
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* @sig_size: Size of signature data
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*
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* Data structure used in create_auth_data(). @key_file through
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* @image_size are input parameters. @auth, @sig_data and @sig_size
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* are filled in by create_auth_data().
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*/
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struct auth_context {
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char *key_file;
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char *cert_file;
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uint8_t *image_data;
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size_t image_size;
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struct efi_firmware_image_authentication auth;
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uint8_t *sig_data;
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size_t sig_size;
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};
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static int dump_sig;
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/**
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* read_bin_file - read a firmware binary file
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* @bin: Path to a firmware binary file
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* @data: Pointer to pointer of allocated buffer
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* @bin_size: Size of allocated buffer
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*
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* Read out a content of binary, @bin, into @data.
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* A caller should free @data.
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*
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* Return:
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* * 0 - on success
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* * -1 - on failure
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*/
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static int read_bin_file(char *bin, uint8_t **data, off_t *bin_size)
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{
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FILE *g;
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struct stat bin_stat;
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void *buf;
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size_t size;
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int ret = 0;
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g = fopen(bin, "r");
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if (!g) {
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fprintf(stderr, "cannot open %s\n", bin);
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return -1;
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}
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if (stat(bin, &bin_stat) < 0) {
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fprintf(stderr, "cannot determine the size of %s\n", bin);
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ret = -1;
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goto err;
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}
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if (bin_stat.st_size > SIZE_MAX) {
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fprintf(stderr, "file size is too large for malloc: %s\n", bin);
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ret = -1;
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goto err;
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}
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buf = malloc(bin_stat.st_size);
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if (!buf) {
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fprintf(stderr, "cannot allocate memory: %zx\n",
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(size_t)bin_stat.st_size);
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ret = -1;
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goto err;
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}
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size = fread(buf, 1, bin_stat.st_size, g);
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if (size < bin_stat.st_size) {
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fprintf(stderr, "read failed (%zx)\n", size);
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ret = -1;
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goto err;
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}
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*data = buf;
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*bin_size = bin_stat.st_size;
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err:
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fclose(g);
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return ret;
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}
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/**
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* write_capsule_file - write a capsule file
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* @bin: FILE stream
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* @data: Pointer to data
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* @bin_size: Size of data
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*
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* Write out data, @data, with the size @bin_size.
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*
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* Return:
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* * 0 - on success
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* * -1 - on failure
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*/
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static int write_capsule_file(FILE *f, void *data, size_t size, const char *msg)
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{
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size_t size_written;
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size_written = fwrite(data, 1, size, f);
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if (size_written < size) {
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fprintf(stderr, "%s: write failed (%zx != %zx)\n", msg,
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size_written, size);
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return -1;
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}
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return 0;
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}
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/**
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* create_auth_data - compose authentication data in capsule
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* @auth_context: Pointer to authentication context
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*
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* Fill up an authentication header (.auth) and signature data (.sig_data)
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* in @auth_context, using library functions from openssl.
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* All the parameters in @auth_context must be filled in by a caller.
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*
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* Return:
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* * 0 - on success
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* * -1 - on failure
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*/
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static int create_auth_data(struct auth_context *ctx)
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{
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gnutls_datum_t cert;
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gnutls_datum_t key;
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off_t file_size;
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gnutls_privkey_t pkey;
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gnutls_x509_crt_t x509;
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gnutls_pkcs7_t pkcs7;
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gnutls_datum_t data;
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gnutls_datum_t signature;
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int ret;
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ret = read_bin_file(ctx->cert_file, &cert.data, &file_size);
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if (ret < 0)
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return -1;
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if (file_size > UINT_MAX)
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return -1;
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cert.size = file_size;
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ret = read_bin_file(ctx->key_file, &key.data, &file_size);
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if (ret < 0)
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return -1;
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if (file_size > UINT_MAX)
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return -1;
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key.size = file_size;
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/*
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* For debugging,
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* gnutls_global_set_time_function(mytime);
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* gnutls_global_set_log_function(tls_log_func);
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* gnutls_global_set_log_level(6);
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*/
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ret = gnutls_privkey_init(&pkey);
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if (ret < 0) {
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fprintf(stderr, "error in gnutls_privkey_init(): %s\n",
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gnutls_strerror(ret));
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return -1;
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}
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ret = gnutls_x509_crt_init(&x509);
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if (ret < 0) {
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fprintf(stderr, "error in gnutls_x509_crt_init(): %s\n",
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gnutls_strerror(ret));
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return -1;
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}
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/* load a private key */
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ret = gnutls_privkey_import_x509_raw(pkey, &key, GNUTLS_X509_FMT_PEM,
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0, 0);
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if (ret < 0) {
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fprintf(stderr,
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"error in gnutls_privkey_import_x509_raw(): %s\n",
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gnutls_strerror(ret));
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return -1;
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}
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/* load x509 certificate */
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ret = gnutls_x509_crt_import(x509, &cert, GNUTLS_X509_FMT_PEM);
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if (ret < 0) {
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fprintf(stderr, "error in gnutls_x509_crt_import(): %s\n",
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gnutls_strerror(ret));
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return -1;
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}
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/* generate a PKCS #7 structure */
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ret = gnutls_pkcs7_init(&pkcs7);
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if (ret < 0) {
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fprintf(stderr, "error in gnutls_pkcs7_init(): %s\n",
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gnutls_strerror(ret));
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return -1;
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}
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/* sign */
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/*
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* Data should have
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* * firmware image
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* * monotonic count
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* in this order!
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* See EDK2's FmpAuthenticatedHandlerRsa2048Sha256()
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*/
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data.size = ctx->image_size + sizeof(ctx->auth.monotonic_count);
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data.data = malloc(data.size);
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if (!data.data) {
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fprintf(stderr, "allocating memory (0x%x) failed\n", data.size);
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return -1;
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}
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memcpy(data.data, ctx->image_data, ctx->image_size);
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memcpy(data.data + ctx->image_size, &ctx->auth.monotonic_count,
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sizeof(ctx->auth.monotonic_count));
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ret = gnutls_pkcs7_sign(pkcs7, x509, pkey, &data, NULL, NULL,
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GNUTLS_DIG_SHA256,
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/* GNUTLS_PKCS7_EMBED_DATA? */
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GNUTLS_PKCS7_INCLUDE_CERT |
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GNUTLS_PKCS7_INCLUDE_TIME);
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if (ret < 0) {
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fprintf(stderr, "error in gnutls_pkcs7)sign(): %s\n",
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gnutls_strerror(ret));
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return -1;
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}
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/* export */
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ret = gnutls_pkcs7_export2(pkcs7, GNUTLS_X509_FMT_DER, &signature);
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if (ret < 0) {
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fprintf(stderr, "error in gnutls_pkcs7_export2: %s\n",
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gnutls_strerror(ret));
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return -1;
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}
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ctx->sig_data = signature.data;
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ctx->sig_size = signature.size;
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/* fill auth_info */
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ctx->auth.auth_info.hdr.dwLength = sizeof(ctx->auth.auth_info)
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+ ctx->sig_size;
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ctx->auth.auth_info.hdr.wRevision = WIN_CERT_REVISION_2_0;
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ctx->auth.auth_info.hdr.wCertificateType = WIN_CERT_TYPE_EFI_GUID;
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memcpy(&ctx->auth.auth_info.cert_type, &efi_guid_cert_type_pkcs7,
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sizeof(efi_guid_cert_type_pkcs7));
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/*
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* For better clean-ups,
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* gnutls_pkcs7_deinit(pkcs7);
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* gnutls_privkey_deinit(pkey);
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* gnutls_x509_crt_deinit(x509);
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* free(cert.data);
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* free(key.data);
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* if error
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* gnutls_free(signature.data);
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*/
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return 0;
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}
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/**
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* dump_signature - dump out a signature
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* @path: Path to a capsule file
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* @signature: Signature data
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* @sig_size: Size of signature data
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*
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* Signature data pointed to by @signature will be saved into
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* a file whose file name is @path with ".p7" suffix.
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*
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* Return:
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* * 0 - on success
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* * -1 - on failure
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*/
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static int dump_signature(const char *path, uint8_t *signature, size_t sig_size)
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{
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char *sig_path;
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FILE *f;
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size_t size;
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int ret = -1;
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sig_path = malloc(strlen(path) + 3 + 1);
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if (!sig_path)
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return ret;
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sprintf(sig_path, "%s.p7", path);
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f = fopen(sig_path, "w");
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if (!f)
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goto err;
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size = fwrite(signature, 1, sig_size, f);
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if (size == sig_size)
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ret = 0;
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fclose(f);
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err:
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free(sig_path);
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return ret;
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}
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/**
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* free_sig_data - free out signature data
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* @ctx: Pointer to authentication context
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*
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* Free signature data allocated in create_auth_data().
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*/
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static void free_sig_data(struct auth_context *ctx)
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{
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if (ctx->sig_size)
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gnutls_free(ctx->sig_data);
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}
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/**
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* create_fwbin - create an uefi capsule file
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* @path: Path to a created capsule file
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* @bin: Path to a firmware binary to encapsulate
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* @guid: GUID of related FMP driver
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* @index: Index number in capsule
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* @instance: Instance number in capsule
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* @mcount: Monotonic count in authentication information
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* @private_file: Path to a private key file
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* @cert_file: Path to a certificate file
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*
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* This function actually does the job of creating an uefi capsule file.
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* All the arguments must be supplied.
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* If either @private_file ror @cert_file is NULL, the capsule file
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* won't be signed.
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*
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* Return:
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* * 0 - on success
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* * -1 - on failure
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*/
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static int create_fwbin(char *path, char *bin, efi_guid_t *guid,
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unsigned long index, unsigned long instance,
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uint64_t mcount, char *privkey_file, char *cert_file)
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{
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struct efi_capsule_header header;
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struct efi_firmware_management_capsule_header capsule;
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struct efi_firmware_management_capsule_image_header image;
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struct auth_context auth_context;
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FILE *f;
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uint8_t *data;
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off_t bin_size;
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uint64_t offset;
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int ret;
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#ifdef DEBUG
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fprintf(stderr, "For output: %s\n", path);
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fprintf(stderr, "\tbin: %s\n\ttype: %pUl\n", bin, guid);
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fprintf(stderr, "\tindex: %lu\n\tinstance: %lu\n", index, instance);
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#endif
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auth_context.sig_size = 0;
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f = NULL;
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data = NULL;
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ret = -1;
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/*
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* read a firmware binary
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*/
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if (read_bin_file(bin, &data, &bin_size))
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goto err;
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/* first, calculate signature to determine its size */
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if (privkey_file && cert_file) {
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auth_context.key_file = privkey_file;
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auth_context.cert_file = cert_file;
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auth_context.auth.monotonic_count = mcount;
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auth_context.image_data = data;
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auth_context.image_size = bin_size;
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if (create_auth_data(&auth_context)) {
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fprintf(stderr, "Signing firmware image failed\n");
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goto err;
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}
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if (dump_sig &&
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dump_signature(path, auth_context.sig_data,
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auth_context.sig_size)) {
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fprintf(stderr, "Creating signature file failed\n");
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goto err;
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}
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}
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/*
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* write a capsule file
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*/
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f = fopen(path, "w");
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if (!f) {
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fprintf(stderr, "cannot open %s\n", path);
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goto err;
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}
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/*
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* capsule file header
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*/
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header.capsule_guid = efi_guid_fm_capsule;
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header.header_size = sizeof(header);
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/* TODO: The current implementation ignores flags */
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header.flags = CAPSULE_FLAGS_PERSIST_ACROSS_RESET;
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header.capsule_image_size = sizeof(header)
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+ sizeof(capsule) + sizeof(uint64_t)
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+ sizeof(image)
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+ bin_size;
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if (auth_context.sig_size)
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header.capsule_image_size += sizeof(auth_context.auth)
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+ auth_context.sig_size;
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if (write_capsule_file(f, &header, sizeof(header),
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"Capsule header"))
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goto err;
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/*
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* firmware capsule header
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* This capsule has only one firmware capsule image.
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*/
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capsule.version = 0x00000001;
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capsule.embedded_driver_count = 0;
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capsule.payload_item_count = 1;
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if (write_capsule_file(f, &capsule, sizeof(capsule),
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"Firmware capsule header"))
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goto err;
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offset = sizeof(capsule) + sizeof(uint64_t);
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if (write_capsule_file(f, &offset, sizeof(offset),
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"Offset to capsule image"))
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goto err;
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/*
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* firmware capsule image header
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*/
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image.version = 0x00000003;
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memcpy(&image.update_image_type_id, guid, sizeof(*guid));
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image.update_image_index = index;
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image.reserved[0] = 0;
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image.reserved[1] = 0;
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image.reserved[2] = 0;
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image.update_image_size = bin_size;
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if (auth_context.sig_size)
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image.update_image_size += sizeof(auth_context.auth)
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+ auth_context.sig_size;
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image.update_vendor_code_size = 0; /* none */
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image.update_hardware_instance = instance;
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image.image_capsule_support = 0;
|
|
if (auth_context.sig_size)
|
|
image.image_capsule_support |= CAPSULE_SUPPORT_AUTHENTICATION;
|
|
if (write_capsule_file(f, &image, sizeof(image),
|
|
"Firmware capsule image header"))
|
|
goto err;
|
|
|
|
/*
|
|
* signature
|
|
*/
|
|
if (auth_context.sig_size) {
|
|
if (write_capsule_file(f, &auth_context.auth,
|
|
sizeof(auth_context.auth),
|
|
"Authentication header"))
|
|
goto err;
|
|
|
|
if (write_capsule_file(f, auth_context.sig_data,
|
|
auth_context.sig_size, "Signature"))
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* firmware binary
|
|
*/
|
|
if (write_capsule_file(f, data, bin_size, "Firmware binary"))
|
|
goto err;
|
|
|
|
ret = 0;
|
|
err:
|
|
if (f)
|
|
fclose(f);
|
|
free_sig_data(&auth_context);
|
|
free(data);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* convert_uuid_to_guid() - convert UUID to GUID
|
|
* @buf: UUID binary
|
|
*
|
|
* UUID and GUID have the same data structure, but their binary
|
|
* formats are different due to the endianness. See lib/uuid.c.
|
|
* Since uuid_parse() can handle only UUID, this function must
|
|
* be called to get correct data for GUID when parsing a string.
|
|
*
|
|
* The correct data will be returned in @buf.
|
|
*/
|
|
void convert_uuid_to_guid(unsigned char *buf)
|
|
{
|
|
unsigned char c;
|
|
|
|
c = buf[0];
|
|
buf[0] = buf[3];
|
|
buf[3] = c;
|
|
c = buf[1];
|
|
buf[1] = buf[2];
|
|
buf[2] = c;
|
|
|
|
c = buf[4];
|
|
buf[4] = buf[5];
|
|
buf[5] = c;
|
|
|
|
c = buf[6];
|
|
buf[6] = buf[7];
|
|
buf[7] = c;
|
|
}
|
|
|
|
/**
|
|
* main - main entry function of mkeficapsule
|
|
* @argc: Number of arguments
|
|
* @argv: Array of pointers to arguments
|
|
*
|
|
* Create an uefi capsule file, optionally signing it.
|
|
* Parse all the arguments and pass them on to create_fwbin().
|
|
*
|
|
* Return:
|
|
* * 0 - on success
|
|
* * -1 - on failure
|
|
*/
|
|
int main(int argc, char **argv)
|
|
{
|
|
efi_guid_t *guid;
|
|
unsigned char uuid_buf[16];
|
|
unsigned long index, instance;
|
|
uint64_t mcount;
|
|
char *privkey_file, *cert_file;
|
|
int c, idx;
|
|
|
|
guid = NULL;
|
|
index = 0;
|
|
instance = 0;
|
|
mcount = 0;
|
|
privkey_file = NULL;
|
|
cert_file = NULL;
|
|
dump_sig = 0;
|
|
for (;;) {
|
|
c = getopt_long(argc, argv, opts_short, options, &idx);
|
|
if (c == -1)
|
|
break;
|
|
|
|
switch (c) {
|
|
case 'g':
|
|
if (guid) {
|
|
fprintf(stderr,
|
|
"Image type already specified\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (uuid_parse(optarg, uuid_buf)) {
|
|
fprintf(stderr, "Wrong guid format\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
convert_uuid_to_guid(uuid_buf);
|
|
guid = (efi_guid_t *)uuid_buf;
|
|
break;
|
|
case 'i':
|
|
index = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'I':
|
|
instance = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'p':
|
|
if (privkey_file) {
|
|
fprintf(stderr,
|
|
"Private Key already specified\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
privkey_file = optarg;
|
|
break;
|
|
case 'c':
|
|
if (cert_file) {
|
|
fprintf(stderr,
|
|
"Certificate file already specified\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
cert_file = optarg;
|
|
break;
|
|
case 'm':
|
|
mcount = strtoul(optarg, NULL, 0);
|
|
break;
|
|
case 'd':
|
|
dump_sig = 1;
|
|
break;
|
|
case 'h':
|
|
print_usage();
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
}
|
|
|
|
/* check necessary parameters */
|
|
if ((argc != optind + 2) || !guid ||
|
|
((privkey_file && !cert_file) ||
|
|
(!privkey_file && cert_file))) {
|
|
print_usage();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (create_fwbin(argv[argc - 1], argv[argc - 2], guid, index, instance,
|
|
mcount, privkey_file, cert_file) < 0) {
|
|
fprintf(stderr, "Creating firmware capsule failed\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
exit(EXIT_SUCCESS);
|
|
}
|