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Remove hmac_sha256 from public API (#2519)

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Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
Nikolay Minaylov
2023-03-21 15:29:54 +03:00
committed by GitHub
parent bf70f4b71a
commit ce50b09b28
6 changed files with 6 additions and 12 deletions
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2
lib/toolbox/SConscript
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@@ -12,7 +12,7 @@ env.Append(
File("manchester_encoder.h"),
File("path.h"),
File("random_name.h"),
File("hmac_sha256.h"),
File("sha256.h"),
File("crc32_calc.h"),
File("dir_walk.h"),
File("md5.h"),

98
lib/toolbox/hmac_sha256.c
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@@ -1,98 +0,0 @@
/*
* hmac.c - HMAC
*
* Copyright (C) 2017 Sergei Glushchenko
* Author: Sergei Glushchenko <gl.sergei@gmail.com>
*
* This file is a part of U2F firmware for STM32
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As additional permission under GNU GPL version 3 section 7, you may
* distribute non-source form of the Program without the copy of the
* GNU GPL normally required by section 4, provided you inform the
* recipients of GNU GPL by a written offer.
*
*/
#include <stdint.h>
#include "sha256.h"
#include "hmac_sha256.h"
static void _hmac_sha256_init(const hmac_context* ctx) {
hmac_sha256_context* context = (hmac_sha256_context*)ctx;
sha256_start(&context->sha_ctx);
}
static void
_hmac_sha256_update(const hmac_context* ctx, const uint8_t* message, unsigned message_size) {
hmac_sha256_context* context = (hmac_sha256_context*)ctx;
sha256_update(&context->sha_ctx, message, message_size);
}
static void _hmac_sha256_finish(const hmac_context* ctx, uint8_t* hash_result) {
hmac_sha256_context* context = (hmac_sha256_context*)ctx;
sha256_finish(&context->sha_ctx, hash_result);
}
/* Compute an HMAC using K as a key (as in RFC 6979). Note that K is always
the same size as the hash result size. */
static void hmac_init(const hmac_context* ctx, const uint8_t* K) {
uint8_t* pad = ctx->tmp + 2 * ctx->result_size;
unsigned i;
for(i = 0; i < ctx->result_size; ++i) pad[i] = K[i] ^ 0x36;
for(; i < ctx->block_size; ++i) pad[i] = 0x36;
ctx->init_hash(ctx);
ctx->update_hash(ctx, pad, ctx->block_size);
}
static void hmac_update(const hmac_context* ctx, const uint8_t* message, unsigned message_size) {
ctx->update_hash(ctx, message, message_size);
}
static void hmac_finish(const hmac_context* ctx, const uint8_t* K, uint8_t* result) {
uint8_t* pad = ctx->tmp + 2 * ctx->result_size;
unsigned i;
for(i = 0; i < ctx->result_size; ++i) pad[i] = K[i] ^ 0x5c;
for(; i < ctx->block_size; ++i) pad[i] = 0x5c;
ctx->finish_hash(ctx, result);
ctx->init_hash(ctx);
ctx->update_hash(ctx, pad, ctx->block_size);
ctx->update_hash(ctx, result, ctx->result_size);
ctx->finish_hash(ctx, result);
}
void hmac_sha256_init(hmac_sha256_context* ctx, const uint8_t* K) {
ctx->hmac_ctx.init_hash = _hmac_sha256_init;
ctx->hmac_ctx.update_hash = _hmac_sha256_update;
ctx->hmac_ctx.finish_hash = _hmac_sha256_finish;
ctx->hmac_ctx.block_size = 64;
ctx->hmac_ctx.result_size = 32;
ctx->hmac_ctx.tmp = ctx->tmp;
hmac_init(&ctx->hmac_ctx, K);
}
void hmac_sha256_update(
const hmac_sha256_context* ctx,
const uint8_t* message,
unsigned message_size) {
hmac_update(&ctx->hmac_ctx, message, message_size);
}
void hmac_sha256_finish(const hmac_sha256_context* ctx, const uint8_t* K, uint8_t* hash_result) {
hmac_finish(&ctx->hmac_ctx, K, hash_result);
}

38
lib/toolbox/hmac_sha256.h
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@@ -1,38 +0,0 @@
#pragma once
#include "sha256.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct hmac_context {
void (*init_hash)(const struct hmac_context* context);
void (*update_hash)(
const struct hmac_context* context,
const uint8_t* message,
unsigned message_size);
void (*finish_hash)(const struct hmac_context* context, uint8_t* hash_result);
unsigned block_size; /* Hash function block size in bytes, eg 64 for SHA-256. */
unsigned result_size; /* Hash function result size in bytes, eg 32 for SHA-256. */
uint8_t* tmp; /* Must point to a buffer of at least (2 * result_size + block_size) bytes. */
} hmac_context;
typedef struct hmac_sha256_context {
hmac_context hmac_ctx;
sha256_context sha_ctx;
uint8_t tmp[32 * 2 + 64];
} hmac_sha256_context;
void hmac_sha256_init(hmac_sha256_context* ctx, const uint8_t* K);
void hmac_sha256_update(
const hmac_sha256_context* ctx,
const uint8_t* message,
unsigned message_size);
void hmac_sha256_finish(const hmac_sha256_context* ctx, const uint8_t* K, uint8_t* hash_result);
#ifdef __cplusplus
}
#endif