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tpm: add kconfig control in tcg2_create_digest()
[J-u-boot.git] / lib / hash-checksum.c
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
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 }
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