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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: b37b46f042cc ("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+
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/*
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* Copyright (c) 2013, Andreas Oetken.
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*/
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#ifndef USE_HOSTCC
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#include <common.h>
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#include <fdtdec.h>
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#include <asm/byteorder.h>
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#include <linux/errno.h>
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#include <asm/unaligned.h>
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#include <hash.h>
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#else
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#include "fdt_host.h"
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#endif
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#include <hash.h>
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#include <image.h>
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int hash_calculate(const char *name,
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const struct image_region *region,
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int region_count, uint8_t *checksum)
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{
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struct hash_algo *algo;
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int ret = 0;
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void *ctx;
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int i;
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if (region_count < 1)
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return -EINVAL;
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ret = hash_progressive_lookup_algo(name, &algo);
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if (ret)
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return ret;
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ret = algo->hash_init(algo, &ctx);
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if (ret)
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return ret;
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for (i = 0; i < region_count - 1; i++) {
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ret = algo->hash_update(algo, ctx, region[i].data,
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region[i].size, 0);
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if (ret)
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return ret;
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}
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ret = algo->hash_update(algo, ctx, region[i].data, region[i].size, 1);
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if (ret)
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return ret;
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ret = algo->hash_finish(algo, ctx, checksum, algo->digest_size);
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if (ret)
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return ret;
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return 0;
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}
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