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/* Copyright (c) 2011 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.
*
* Verified boot key utility
*/
#include <getopt.h>
#include <inttypes.h> /* For PRIu64 */
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cryptolib.h"
#include "futility.h"
#include "host_common.h"
#include "util_misc.h"
#include "vboot_common.h"
/* Command line options */
enum {
OPT_INKEY = 1000,
OPT_KEY_VERSION,
OPT_ALGORITHM,
OPT_MODE_PACK,
OPT_MODE_UNPACK,
OPT_COPYTO,
};
static const struct option long_opts[] = {
{"key", 1, 0, OPT_INKEY},
{"version", 1, 0, OPT_KEY_VERSION},
{"algorithm", 1, 0, OPT_ALGORITHM},
{"pack", 1, 0, OPT_MODE_PACK},
{"unpack", 1, 0, OPT_MODE_UNPACK},
{"copyto", 1, 0, OPT_COPYTO},
{NULL, 0, 0, 0}
};
static void print_help(const char *progname)
{
int i;
printf("\n"
"Usage: " MYNAME " %s --pack <outfile> [PARAMETERS]\n"
"\n"
" Required parameters:\n"
" --key <infile> RSA key file (.keyb or .pem)\n"
" --version <number> Key version number "
"(required for .keyb,\n"
" ignored for .pem)\n"
" --algorithm <number> "
"Signing algorithm to use with key:\n", progname);
for (i = 0; i < kNumAlgorithms; i++) {
printf(" %d = (%s)\n",
i, algo_strings[i]);
}
printf("\nOR\n\n"
"Usage: " MYNAME " %s --unpack <infile>\n"
"\n"
" Optional parameters:\n"
" --copyto <file> "
"Write a copy of the key to this file.\n\n", progname);
}
/* Pack a .keyb file into a .vbpubk, or a .pem into a .vbprivk */
static int Pack(const char *infile, const char *outfile, uint64_t algorithm,
uint64_t version)
{
VbPublicKey *pubkey;
VbPrivateKey *privkey;
if (!infile || !outfile) {
fprintf(stderr, "vbutil_key: Must specify --in and --out\n");
return 1;
}
pubkey = PublicKeyReadKeyb(infile, algorithm, version);
if (pubkey) {
if (0 != PublicKeyWrite(outfile, pubkey)) {
fprintf(stderr, "vbutil_key: Error writing key.\n");
return 1;
}
free(pubkey);
return 0;
}
privkey = PrivateKeyReadPem(infile, algorithm);
if (privkey) {
if (0 != PrivateKeyWrite(outfile, privkey)) {
fprintf(stderr, "vbutil_key: Error writing key.\n");
return 1;
}
free(privkey);
return 0;
}
VbExError("Unable to parse either .keyb or .pem from %s\n", infile);
return 1;
}
/* Unpack a .vbpubk or .vbprivk */
static int Unpack(const char *infile, const char *outfile)
{
VbPublicKey *pubkey;
VbPrivateKey *privkey;
if (!infile) {
fprintf(stderr, "Need file to unpack\n");
return 1;
}
pubkey = PublicKeyRead(infile);
if (pubkey) {
printf("Public Key file: %s\n", infile);
printf("Algorithm: %" PRIu64 " %s\n", pubkey->algorithm,
(pubkey->algorithm < kNumAlgorithms ?
algo_strings[pubkey->algorithm] : "(invalid)"));
printf("Key Version: %" PRIu64 "\n", pubkey->key_version);
printf("Key sha1sum: ");
PrintPubKeySha1Sum(pubkey);
printf("\n");
if (outfile) {
if (0 != PublicKeyWrite(outfile, pubkey)) {
fprintf(stderr,
"vbutil_key: Error writing key copy\n");
free(pubkey);
return 1;
}
}
free(pubkey);
return 0;
}
privkey = PrivateKeyRead(infile);
if (privkey) {
printf("Private Key file: %s\n", infile);
printf("Algorithm: %" PRIu64 " %s\n",
privkey->algorithm,
(privkey->algorithm <
kNumAlgorithms ? algo_strings[privkey->
algorithm] :
"(invalid)"));
if (outfile) {
if (0 != PrivateKeyWrite(outfile, privkey)) {
fprintf(stderr,
"vbutil_key: Error writing key copy\n");
free(privkey);
return 1;
}
}
free(privkey);
return 0;
}
VbExError("Unable to parse either .vbpubk or vbprivk from %s\n",
infile);
return 1;
}
static int do_vbutil_key(int argc, char *argv[])
{
char *infile = NULL;
char *outfile = NULL;
int mode = 0;
int parse_error = 0;
uint64_t version = 1;
uint64_t algorithm = kNumAlgorithms;
char *e;
int i;
while ((i = getopt_long(argc, argv, "", long_opts, NULL)) != -1) {
switch (i) {
case '?':
/* Unhandled option */
VbExError("Unknown option\n");
parse_error = 1;
break;
case OPT_INKEY:
infile = optarg;
break;
case OPT_KEY_VERSION:
version = strtoul(optarg, &e, 0);
if (!*optarg || (e && *e)) {
VbExError("Invalid --version\n");
parse_error = 1;
}
break;
case OPT_ALGORITHM:
algorithm = strtoul(optarg, &e, 0);
if (!*optarg || (e && *e)) {
VbExError("Invalid --algorithm\n");
parse_error = 1;
}
break;
case OPT_MODE_PACK:
mode = i;
outfile = optarg;
break;
case OPT_MODE_UNPACK:
mode = i;
infile = optarg;
break;
case OPT_COPYTO:
outfile = optarg;
break;
}
}
if (parse_error) {
print_help(argv[0]);
return 1;
}
switch (mode) {
case OPT_MODE_PACK:
return Pack(infile, outfile, algorithm, version);
case OPT_MODE_UNPACK:
return Unpack(infile, outfile);
default:
printf("Must specify a mode.\n");
print_help(argv[0]);
return 1;
}
}
DECLARE_FUTIL_COMMAND(vbutil_key, do_vbutil_key,
VBOOT_VERSION_1_0,
"Wraps RSA keys with vboot headers",
print_help);
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