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

   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
  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        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