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[thirdparty/u-boot.git] / lib / hash-checksum.c
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83d290c5 1// SPDX-License-Identifier: GPL-2.0+
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2/*
3 * Copyright (c) 2013, Andreas Oetken.
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4 */
5
29a23f9d 6#ifndef USE_HOSTCC
646257d1 7#include <fdtdec.h>
646257d1 8#include <asm/byteorder.h>
1221ce45 9#include <linux/errno.h>
646257d1 10#include <asm/unaligned.h>
b37b46f0 11#include <hash.h>
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12#else
13#include "fdt_host.h"
b37b46f0 14#endif
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15#include <hash.h>
16#include <image.h>
646257d1 17
b37b46f0 18int hash_calculate(const char *name,
13c133b9 19 const struct image_region *region,
b37b46f0 20 int region_count, uint8_t *checksum)
646257d1 21{
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22 struct hash_algo *algo;
23 int ret = 0;
24 void *ctx;
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25 int i;
26
27 if (region_count < 1)
28 return -EINVAL;
646257d1 29
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30 ret = hash_progressive_lookup_algo(name, &algo);
31 if (ret)
32 return ret;
646257d1 33
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34 ret = algo->hash_init(algo, &ctx);
35 if (ret)
36 return ret;
37
38 for (i = 0; i < region_count - 1; i++) {
39 ret = algo->hash_update(algo, ctx, region[i].data,
40 region[i].size, 0);
41 if (ret)
42 return ret;
43 }
44
45 ret = algo->hash_update(algo, ctx, region[i].data, region[i].size, 1);
46 if (ret)
47 return ret;
48 ret = algo->hash_finish(algo, ctx, checksum, algo->digest_size);
49 if (ret)
50 return ret;
646257d1 51
b37b46f0 52 return 0;
646257d1 53}