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pkg(7): use libmd for sha256 instead of openssl

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OpenSSL 3.0 has deprecated the sha256 api, let's use libmd which has the
same API instead.

In order to avoid the collision in definitions (sha256.h cannot be
included in the same file as a file where openssl headers has been
included) let's move the sha256 related code in its own file

PR:		270023
Reported by:	ngie
This commit is contained in:
Baptiste Daroussin 2023-03-09 17:38:30 +01:00
parent e08302f649
commit b2654064c2
4 changed files with 147 additions and 79 deletions
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4
usr.sbin/pkg/Makefile
View file

@ -23,11 +23,11 @@ CONFSNAME_${PKGCONF}= ${PKGCONF:C/\.conf.+$/.conf/}
CONFSDIR= /etc/pkg
CONFSMODE= 644
PROG= pkg
SRCS= pkg.c dns_utils.c config.c
SRCS= pkg.c dns_utils.c config.c hash.c
MAN= pkg.7
CFLAGS+=-I${SRCTOP}/contrib/libucl/include
.PATH: ${SRCTOP}/contrib/libucl/include
LIBADD= archive fetch ucl crypto ssl util
LIBADD= archive fetch ucl crypto ssl util md
.include <bsd.prog.mk>

112
usr.sbin/pkg/hash.c Normal file
View file

@ -0,0 +1,112 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012-2014 Baptiste Daroussin <bapt@FreeBSD.org>
* Copyright (c) 2013 Bryan Drewery <bdrewery@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <err.h>
#include <sha256.h>
#include <stdio.h>
#include <unistd.h>
#include "hash.h"
static void
sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH],
char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int i;
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
sprintf(out + (i * 2), "%02x", hash[i]);
out[SHA256_DIGEST_LENGTH * 2] = '\0';
}
void
sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
unsigned char hash[SHA256_DIGEST_LENGTH];
SHA256_CTX sha256;
out[0] = '\0';
SHA256_Init(&sha256);
SHA256_Update(&sha256, buf, len);
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
}
int
sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int my_fd;
FILE *fp;
char buffer[BUFSIZ];
unsigned char hash[SHA256_DIGEST_LENGTH];
size_t r;
int ret;
SHA256_CTX sha256;
fp = NULL;
ret = 1;
out[0] = '\0';
/* Duplicate the fd so that fclose(3) does not close it. */
if ((my_fd = dup(fd)) == -1) {
warnx("dup");
goto cleanup;
}
if ((fp = fdopen(my_fd, "rb")) == NULL) {
warnx("fdopen");
goto cleanup;
}
SHA256_Init(&sha256);
while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0)
SHA256_Update(&sha256, buffer, r);
if (ferror(fp) != 0) {
warnx("fread");
goto cleanup;
}
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
ret = 0;
cleanup:
if (fp != NULL)
fclose(fp);
else if (my_fd != -1)
close(my_fd);
(void)lseek(fd, 0, SEEK_SET);
return (ret);
}

32
usr.sbin/pkg/hash.h Normal file
View file

@ -0,0 +1,32 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2023 Baptiste Daroussin <bapt@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#pragma once
void sha256_buf(char *buf, size_t len, char out[]);
int sha256_fd(int fd, char out[]);

78
usr.sbin/pkg/pkg.c
View file

@ -56,6 +56,7 @@ __FBSDID("$FreeBSD$");
#include "dns_utils.h"
#include "config.h"
#include "hash.h"
struct sig_cert {
char *name;
@ -402,83 +403,6 @@ load_fingerprints(const char *path, int *count)
return (fingerprints);
}
static void
sha256_hash(unsigned char hash[SHA256_DIGEST_LENGTH],
char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int i;
for (i = 0; i < SHA256_DIGEST_LENGTH; i++)
sprintf(out + (i * 2), "%02x", hash[i]);
out[SHA256_DIGEST_LENGTH * 2] = '\0';
}
static void
sha256_buf(char *buf, size_t len, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
unsigned char hash[SHA256_DIGEST_LENGTH];
SHA256_CTX sha256;
out[0] = '\0';
SHA256_Init(&sha256);
SHA256_Update(&sha256, buf, len);
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
}
static int
sha256_fd(int fd, char out[SHA256_DIGEST_LENGTH * 2 + 1])
{
int my_fd;
FILE *fp;
char buffer[BUFSIZ];
unsigned char hash[SHA256_DIGEST_LENGTH];
size_t r;
int ret;
SHA256_CTX sha256;
fp = NULL;
ret = 1;
out[0] = '\0';
/* Duplicate the fd so that fclose(3) does not close it. */
if ((my_fd = dup(fd)) == -1) {
warnx("dup");
goto cleanup;
}
if ((fp = fdopen(my_fd, "rb")) == NULL) {
warnx("fdopen");
goto cleanup;
}
SHA256_Init(&sha256);
while ((r = fread(buffer, 1, BUFSIZ, fp)) > 0)
SHA256_Update(&sha256, buffer, r);
if (ferror(fp) != 0) {
warnx("fread");
goto cleanup;
}
SHA256_Final(hash, &sha256);
sha256_hash(hash, out);
ret = 0;
cleanup:
if (fp != NULL)
fclose(fp);
else if (my_fd != -1)
close(my_fd);
(void)lseek(fd, 0, SEEK_SET);
return (ret);
}
static EVP_PKEY *
load_public_key_file(const char *file)
{