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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>
*/
#ifndef USE_HOSTCC
#include <cyclic.h>
#endif /* USE_HOSTCC */
#include <string.h>
#include <u-boot/sha1.h>
const u8 sha1_der_prefix[SHA1_DER_LEN] = {
0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e,
0x03, 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14
};
void sha1_starts(sha1_context *ctx)
{
mbedtls_sha1_init(ctx);
mbedtls_sha1_starts(ctx);
}
void sha1_update(sha1_context *ctx, const unsigned char *input,
unsigned int length)
{
mbedtls_sha1_update(ctx, input, length);
}
void sha1_finish(sha1_context *ctx, unsigned char output[SHA1_SUM_LEN])
{
mbedtls_sha1_finish(ctx, output);
mbedtls_sha1_free(ctx);
}
void sha1_csum_wd(const unsigned char *input, unsigned int ilen,
unsigned char *output, unsigned int chunk_sz)
{
sha1_context ctx;
sha1_starts(&ctx);
if (IS_ENABLED(CONFIG_HW_WATCHDOG) || IS_ENABLED(CONFIG_WATCHDOG)) {
const unsigned char *curr = input;
const unsigned char *end = input + ilen;
int chunk;
while (curr < end) {
chunk = end - curr;
if (chunk > chunk_sz)
chunk = chunk_sz;
sha1_update(&ctx, curr, chunk);
curr += chunk;
schedule();
}
} else {
sha1_update(&ctx, input, ilen);
}
sha1_finish(&ctx, output);
}
void sha1_hmac(const unsigned char *key, int keylen,
const unsigned char *input, unsigned int ilen,
unsigned char *output)
{
int i;
sha1_context ctx;
unsigned char k_ipad[K_PAD_LEN];
unsigned char k_opad[K_PAD_LEN];
unsigned char tmpbuf[20];
if (keylen > K_PAD_LEN)
return;
memset(k_ipad, K_IPAD_VAL, sizeof(k_ipad));
memset(k_opad, K_OPAD_VAL, sizeof(k_opad));
for (i = 0; i < keylen; i++) {
k_ipad[i] ^= key[i];
k_opad[i] ^= key[i];
}
sha1_starts(&ctx);
sha1_update(&ctx, k_ipad, sizeof(k_ipad));
sha1_update(&ctx, input, ilen);
sha1_finish(&ctx, tmpbuf);
sha1_starts(&ctx);
sha1_update(&ctx, k_opad, sizeof(k_opad));
sha1_update(&ctx, tmpbuf, sizeof(tmpbuf));
sha1_finish(&ctx, output);
memset(k_ipad, 0, sizeof(k_ipad));
memset(k_opad, 0, sizeof(k_opad));
memset(tmpbuf, 0, sizeof(tmpbuf));
memset(&ctx, 0, sizeof(sha1_context));
}
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