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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2016 Toomas Soome <tsoome@me.com>
* Copyright 2017 OmniTI Computer Consulting, Inc. All rights reserved.
*/
/*
* Create sha1 hash for file.
*
* NOTE: This is hardwired for now, so use libmd's SHA1 for simplicity.
*/
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <locale.h>
#include <sha1.h>
#include <cryptoutil.h>
#include "bootadm.h"
#define BUFFERSIZE (64 * 1024)
static uint8_t buf[BUFFERSIZE];
int
bootadm_digest(const char *filename, char **result)
{
int fd;
char *resultstr = NULL;
uint8_t *resultbuf;
int resultstrlen, resultlen, exitcode;
SHA1_CTX sha1_ctx;
ssize_t nread;
/* Allocate a buffer to store result. */
resultlen = SHA1_DIGEST_LENGTH;
if ((resultbuf = malloc(resultlen)) == NULL) {
bam_print(gettext("out of memory\n"));
exitcode = BAM_ERROR;
goto cleanup;
}
if ((fd = open(filename, O_RDONLY | O_NONBLOCK)) == -1) {
bam_print(gettext("can not open input file %s\n"), filename);
exitcode = BAM_ERROR;
goto cleanup;
}
SHA1Init(&sha1_ctx);
while ((nread = read(fd, buf, sizeof (buf))) > 0)
SHA1Update(&sha1_ctx, buf, nread);
if (nread == -1) {
bam_print(gettext("error reading file: %s\n"), strerror(errno));
exitcode = BAM_ERROR;
goto cleanup;
}
SHA1Final(resultbuf, &sha1_ctx);
/* Allocate a buffer to store result string */
resultstrlen = 2 * resultlen + 1; /* Two hex chars per byte. */
if ((resultstr = malloc(resultstrlen)) == NULL) {
bam_print(gettext("out of memory\n"));
exitcode = BAM_ERROR;
goto cleanup;
}
tohexstr(resultbuf, resultlen, resultstr, resultstrlen);
exitcode = BAM_SUCCESS;
(void) close(fd);
cleanup:
if (exitcode == BAM_ERROR) {
free(resultstr);
resultstr = NULL;
}
free(resultbuf);
*result = resultstr;
return (exitcode);
}
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