mirror of
https://xff.cz/git/u-boot/
synced 2025-10-31 10:26:10 +01:00
eb48efce26
If hash_calculate is invoked with region_count = 0, it will try to hash
INT_MAX regions. We should check this parameter.
* Avoid a comparison with different signedness.
* Check that region_count is at least 1.
* Avoid a superfluous assignment.
Fixes: b37b46f042 ("rsa: Use checksum algorithms from struct hash_algo")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
55 lines
1.0 KiB
C
55 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2013, Andreas Oetken.
|
|
*/
|
|
|
|
#ifndef USE_HOSTCC
|
|
#include <common.h>
|
|
#include <fdtdec.h>
|
|
#include <asm/byteorder.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/unaligned.h>
|
|
#include <hash.h>
|
|
#else
|
|
#include "fdt_host.h"
|
|
#endif
|
|
#include <hash.h>
|
|
#include <image.h>
|
|
|
|
int hash_calculate(const char *name,
|
|
const struct image_region *region,
|
|
int region_count, uint8_t *checksum)
|
|
{
|
|
struct hash_algo *algo;
|
|
int ret = 0;
|
|
void *ctx;
|
|
int i;
|
|
|
|
if (region_count < 1)
|
|
return -EINVAL;
|
|
|
|
ret = hash_progressive_lookup_algo(name, &algo);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = algo->hash_init(algo, &ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < region_count - 1; i++) {
|
|
ret = algo->hash_update(algo, ctx, region[i].data,
|
|
region[i].size, 0);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = algo->hash_update(algo, ctx, region[i].data, region[i].size, 1);
|
|
if (ret)
|
|
return ret;
|
|
ret = algo->hash_finish(algo, ctx, checksum, algo->digest_size);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|