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bdc3f44a6b
Implement digest shim layer on top of MbedTLS crypto library. Introduce <alg>_MBEDTLS kconfig for MbedTLS crypto implementations. Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Hash shim layer on MbedTLS Crypto library
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*
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* Copyright (c) 2024 Linaro Limited
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* Author: Raymond Mao <raymond.mao@linaro.org>
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*/
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#ifndef USE_HOSTCC
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#include <cyclic.h>
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#endif /* USE_HOSTCC */
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#include <string.h>
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#include <u-boot/sha1.h>
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const u8 sha1_der_prefix[SHA1_DER_LEN] = {
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0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e,
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0x03, 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14
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};
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void sha1_starts(sha1_context *ctx)
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{
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mbedtls_sha1_init(ctx);
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mbedtls_sha1_starts(ctx);
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}
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void sha1_update(sha1_context *ctx, const unsigned char *input,
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unsigned int length)
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{
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mbedtls_sha1_update(ctx, input, length);
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}
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void sha1_finish(sha1_context *ctx, unsigned char output[SHA1_SUM_LEN])
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{
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mbedtls_sha1_finish(ctx, output);
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mbedtls_sha1_free(ctx);
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}
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void sha1_csum_wd(const unsigned char *input, unsigned int ilen,
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unsigned char *output, unsigned int chunk_sz)
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{
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sha1_context ctx;
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sha1_starts(&ctx);
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if (IS_ENABLED(CONFIG_HW_WATCHDOG) || IS_ENABLED(CONFIG_WATCHDOG)) {
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const unsigned char *curr = input;
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const unsigned char *end = input + ilen;
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int chunk;
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while (curr < end) {
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chunk = end - curr;
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if (chunk > chunk_sz)
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chunk = chunk_sz;
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sha1_update(&ctx, curr, chunk);
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curr += chunk;
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schedule();
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}
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} else {
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sha1_update(&ctx, input, ilen);
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}
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sha1_finish(&ctx, output);
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}
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void sha1_hmac(const unsigned char *key, int keylen,
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const unsigned char *input, unsigned int ilen,
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unsigned char *output)
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{
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int i;
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sha1_context ctx;
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unsigned char k_ipad[K_PAD_LEN];
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unsigned char k_opad[K_PAD_LEN];
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unsigned char tmpbuf[20];
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if (keylen > K_PAD_LEN)
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return;
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memset(k_ipad, K_IPAD_VAL, sizeof(k_ipad));
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memset(k_opad, K_OPAD_VAL, sizeof(k_opad));
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for (i = 0; i < keylen; i++) {
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k_ipad[i] ^= key[i];
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k_opad[i] ^= key[i];
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}
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sha1_starts(&ctx);
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sha1_update(&ctx, k_ipad, sizeof(k_ipad));
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sha1_update(&ctx, input, ilen);
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sha1_finish(&ctx, tmpbuf);
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sha1_starts(&ctx);
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sha1_update(&ctx, k_opad, sizeof(k_opad));
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sha1_update(&ctx, tmpbuf, sizeof(tmpbuf));
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sha1_finish(&ctx, output);
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memset(k_ipad, 0, sizeof(k_ipad));
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memset(k_opad, 0, sizeof(k_opad));
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memset(tmpbuf, 0, sizeof(tmpbuf));
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memset(&ctx, 0, sizeof(sha1_context));
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}
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