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// SPDX-License-Identifier: GPL-2.0+
/*
* Hash shim layer on MbedTLS Crypto library
*
* Copyright (c) 2024 Linaro Limited
* Author: Raymond Mao <raymond.mao@linaro.org>
*/
#include "compiler.h"
#ifndef USE_HOSTCC
#include <watchdog.h>
#endif /* USE_HOSTCC */
#include <u-boot/md5.h>
void MD5Init(MD5Context *ctx)
{
mbedtls_md5_init(ctx);
mbedtls_md5_starts(ctx);
}
void MD5Update(MD5Context *ctx, unsigned char const *buf, unsigned int len)
{
mbedtls_md5_update(ctx, buf, len);
}
void MD5Final(unsigned char digest[16], MD5Context *ctx)
{
mbedtls_md5_finish(ctx, digest);
mbedtls_md5_free(ctx);
}
void md5_wd(const unsigned char *input, unsigned int len,
unsigned char output[16], unsigned int chunk_sz)
{
MD5Context context;
MD5Init(&context);
if (IS_ENABLED(CONFIG_HW_WATCHDOG) || IS_ENABLED(CONFIG_WATCHDOG)) {
const unsigned char *curr = input;
const unsigned char *end = input + len;
int chunk;
while (curr < end) {
chunk = end - curr;
if (chunk > chunk_sz)
chunk = chunk_sz;
MD5Update(&context, curr, chunk);
curr += chunk;
schedule();
}
} else {
MD5Update(&context, input, len);
}
MD5Final(output, &context);
}
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