upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/lib/rsa/rsa-checksum.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013, Andreas Oetken.
*/
#ifndef USE_HOSTCC
#include <common.h>
#include <fdtdec.h>
#include <asm/byteorder.h>
#include <linux/errno.h>
#include <asm/unaligned.h>
#include <hash.h>
#else
#include "fdt_host.h"
#endif
#include <u-boot/rsa.h>
int hash_calculate(const char *name,
const struct image_region region[],
int region_count, uint8_t *checksum)
{
struct hash_algo *algo;
int ret = 0;
void *ctx;
uint32_t i;
i = 0;
ret = hash_progressive_lookup_algo(name, &algo);
if (ret)
return ret;
ret = algo->hash_init(algo, &ctx);
if (ret)
return ret;
for (i = 0; i < region_count - 1; i++) {
ret = algo->hash_update(algo, ctx, region[i].data,
region[i].size, 0);
if (ret)
return ret;
}
ret = algo->hash_update(algo, ctx, region[i].data, region[i].size, 1);
if (ret)
return ret;
ret = algo->hash_finish(algo, ctx, checksum, algo->digest_size);
if (ret)
return ret;
return 0;
}