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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <libintl.h>
#include <locale.h>
#include <string.h>
#include <errno.h>
#include <wanbootutil.h>
#include <sys/wanboot_impl.h>
/* Return codes */
#define HMAC_SUCCESS 0
#define HMAC_NOKEY 1
#define HMAC_ERROR 2
/* Private buffer length */
#define HMAC_BUF_LEN 1024
/*
* This routine is used to compute a hash digest for the file represented
* by the file descirptor, 'fd'. The key, 'hmac_key', and key type, 'ka',
* will be provided by the caller. The resulting hash digest will be
* written to stdout.
*
* Returns:
* HMAC_SUCCESS or HMAC_ERROR.
*/
static int
hash_gen(int in_fd, const wbku_key_attr_t *ka, const uint8_t *hmac_key)
{
SHA1_CTX ctx;
uint8_t buf[HMAC_BUF_LEN];
ssize_t i;
uint8_t digest[HMAC_DIGEST_LEN];
/*
* Initialize the computation.
*/
HMACInit(&ctx, hmac_key, ka->ka_len);
/*
* Read the data to hash.
*/
while ((i = read(in_fd, buf, HMAC_BUF_LEN)) > 0) {
HMACUpdate(&ctx, buf, i);
}
if (i < 0) {
wbku_printerr("Cannot read input_file");
return (HMAC_ERROR);
}
/*
* Finalize the digest.
*/
HMACFinal(&ctx, hmac_key, ka->ka_len, digest);
/*
* Write the digest to stdout.
*/
if (wbio_nwrite(STDOUT_FILENO, digest, sizeof (digest)) != 0) {
wbku_printerr("Cannot output digest");
return (HMAC_ERROR);
}
/*
* Success.
*/
return (HMAC_SUCCESS);
}
/*
* Prints usage().
*/
static void
usage(const char *cmd)
{
(void) fprintf(stderr,
gettext("Usage: %s [-i input_file] -k key_file\n"), cmd);
}
/*
* This program is used to compute a hash digest for data read in from
* stdin or optionally, a file. The resulting hash digest will be written
* to stdout.
*
* Returns:
* HMAC_SUCCESS, HMAC_ERROR or HMAC_NOKEY.
*/
int
main(int argc, char **argv)
{
uint8_t hmac_key[WANBOOT_HMAC_KEY_SIZE];
int c;
char *infile_name = NULL;
char *keyfile_name = NULL;
int in_fd = -1;
FILE *key_fp = NULL;
wbku_key_attr_t ka;
wbku_retcode_t wbkuret;
int ret = HMAC_ERROR;
/*
* Do the necessary magic for localization support.
*/
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
(void) textdomain(TEXT_DOMAIN);
/*
* Initialize program name for use by wbku_printerr().
*/
wbku_errinit(argv[0]);
/*
* Should be at least three arguments.
*/
if (argc < 3) {
usage(argv[0]);
return (HMAC_ERROR);
}
/*
* Parse the options.
*/
while ((c = getopt(argc, argv, "i:k:")) != EOF) {
switch (c) {
case 'i':
/*
* Optional input file.
*/
infile_name = optarg;
break;
case 'k':
/*
* Path to key file.
*/
keyfile_name = optarg;
break;
default:
usage(argv[0]);
return (HMAC_ERROR);
}
}
/*
* A key file must be defined.
*/
if (keyfile_name == NULL) {
wbku_printerr("Must specify the key_file\n");
return (HMAC_ERROR);
}
/*
* If the user did not provide an input file for the data,
* then use stdin as the source.
*/
if (infile_name == NULL) {
in_fd = STDIN_FILENO;
} else {
in_fd = open(infile_name, O_RDONLY);
if (in_fd < 0) {
wbku_printerr("Cannot open input_file");
return (HMAC_ERROR);
}
}
/*
* Open the key file for reading.
*/
if ((key_fp = fopen(keyfile_name, "r")) == NULL) {
wbku_printerr("Cannot open %s", keyfile_name);
goto out;
}
/*
* Create a SHA1 key attribute structure. It's the only hash
* type we support.
*/
wbkuret = wbku_str_to_keyattr(WBKU_KW_HMAC_SHA1, &ka, WBKU_HASH_KEY);
if (wbkuret != WBKU_SUCCESS) {
wbku_printerr("%s\n", wbku_retmsg(wbkuret));
goto out;
}
/*
* Find the client key, if it exists.
*/
wbkuret = wbku_find_key(key_fp, NULL, &ka, hmac_key, B_FALSE);
if (wbkuret != WBKU_SUCCESS) {
wbku_printerr("%s\n", wbku_retmsg(wbkuret));
ret = (wbkuret == WBKU_NOKEY) ? HMAC_NOKEY : HMAC_ERROR;
} else {
ret = hash_gen(in_fd, &ka, hmac_key);
}
out:
/*
* Cleanup.
*/
if (in_fd != -1) {
(void) close(in_fd);
}
if (key_fp != NULL) {
(void) fclose(key_fp);
}
return (ret);
}
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