1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (c) 2013, Andreas Oetken.
4 */
5
6#ifndef USE_HOSTCC
7#include <fdtdec.h>
8#include <asm/byteorder.h>
9#include <linux/errno.h>
10#include <asm/unaligned.h>
11#include <hash.h>
12#else
13#include "fdt_host.h"
14#endif
15#include <hash.h>
16#include <image.h>
17
18int hash_calculate(const char *name,
19		    const struct image_region *region,
20		    int region_count, uint8_t *checksum)
21{
22	struct hash_algo *algo;
23	int ret = 0;
24	void *ctx;
25	int i;
26
27	if (region_count < 1)
28		return -EINVAL;
29
30	ret = hash_progressive_lookup_algo(name, &algo);
31	if (ret)
32		return ret;
33
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;
51
52	return 0;
53}
54