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// SPDX-License-Identifier: GPL-2.0+
/*
* FIPS-180-2 compliant SHA-256 implementation
*
* Copyright (C) 2001-2003 Christophe Devine
*/
#ifndef USE_HOSTCC
#include <u-boot/schedule.h>
#endif /* USE_HOSTCC */
#include <string.h>
#include <u-boot/sha256.h>
#include <linux/compiler_attributes.h>
/*
* Output = SHA-256( input buffer ). Trigger the watchdog every 'chunk_sz'
* bytes of input processed.
*/
void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
unsigned char *output, unsigned int chunk_sz)
{
sha256_context ctx;
#if !defined(USE_HOSTCC) && \
(defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG))
const unsigned char *end;
unsigned char *curr;
int chunk;
#endif
sha256_starts(&ctx);
#if !defined(USE_HOSTCC) && \
(defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG))
curr = (unsigned char *)input;
end = input + ilen;
while (curr < end) {
chunk = end - curr;
if (chunk > chunk_sz)
chunk = chunk_sz;
sha256_update(&ctx, curr, chunk);
curr += chunk;
schedule();
}
#else
sha256_update(&ctx, input, ilen);
#endif
sha256_finish(&ctx, output);
}
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