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
hash_calculate(const char * name,const struct image_region * region,int region_count,uint8_t * checksum)18 int 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