LXR uboot/lib/rsa/rsa-checksum.c

   1/*
   2 * Copyright (c) 2013, Andreas Oetken.
   3 *
   4 * SPDX-License-Identifier:    GPL-2.0+
   5 */
   6
   7#ifndef USE_HOSTCC
   8#include <common.h>
   9#include <fdtdec.h>
  10#include <asm/byteorder.h>
  11#include <linux/errno.h>
  12#include <asm/unaligned.h>
  13#include <hash.h>
  14#else
  15#include "fdt_host.h"
  16#endif
  17#include <u-boot/rsa.h>
  18
  19int hash_calculate(const char *name,
  20                    const struct image_region region[],
  21                    int region_count, uint8_t *checksum)
  22{
  23        struct hash_algo *algo;
  24        int ret = 0;
  25        void *ctx;
  26        uint32_t i;
  27        i = 0;
  28
  29        ret = hash_progressive_lookup_algo(name, &algo);
  30        if (ret)
  31                return ret;
  32
  33        ret = algo->hash_init(algo, &ctx);
  34        if (ret)
  35                return ret;
  36
  37        for (i = 0; i < region_count - 1; i++) {
  38                ret = algo->hash_update(algo, ctx, region[i].data,
  39                                        region[i].size, 0);
  40                if (ret)
  41                        return ret;
  42        }
  43
  44        ret = algo->hash_update(algo, ctx, region[i].data, region[i].size, 1);
  45        if (ret)
  46                return ret;
  47        ret = algo->hash_finish(algo, ctx, checksum, algo->digest_size);
  48        if (ret)
  49                return ret;
  50
  51        return 0;
  52}
  53