xref: /openbmc/u-boot/lib/rsa/rsa-checksum.c (revision 1494cc89)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2013, Andreas Oetken.
4  */
5 
6 #ifndef USE_HOSTCC
7 #include <common.h>
8 #include <fdtdec.h>
9 #include <asm/byteorder.h>
10 #include <linux/errno.h>
11 #include <asm/unaligned.h>
12 #include <hash.h>
13 #else
14 #include "fdt_host.h"
15 #endif
16 #include <u-boot/rsa.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 	uint32_t i;
26 	i = 0;
27 
28 	ret = hash_progressive_lookup_algo(name, &algo);
29 	if (ret)
30 		return ret;
31 
32 	ret = algo->hash_init(algo, &ctx);
33 	if (ret)
34 		return ret;
35 
36 	for (i = 0; i < region_count - 1; i++) {
37 		ret = algo->hash_update(algo, ctx, region[i].data,
38 					region[i].size, 0);
39 		if (ret)
40 			return ret;
41 	}
42 
43 	ret = algo->hash_update(algo, ctx, region[i].data, region[i].size, 1);
44 	if (ret)
45 		return ret;
46 	ret = algo->hash_finish(algo, ctx, checksum, algo->digest_size);
47 	if (ret)
48 		return ret;
49 
50 	return 0;
51 }
52