mirror of https://github.com/wolfSSL/wolfBoot.git
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/* delta.h
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*
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* Implementation of wolfBoot diff/patch functions,
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*
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* The format of the patch is based on the mechanism suggested
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* by Bentley/McIlroy, which is particularly effective
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* to generate small binary patches.
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*
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*
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* Compile with DELTA_UPDATES=1
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*
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* Use tools/sign.py or tool/sign.c on the host to provide small
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* secure update packages containing only binary difference, using the
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* --delta option.
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*
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*
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* Copyright (C) 2021 wolfSSL Inc.
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*
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* This file is part of wolfBoot.
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*
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* wolfBoot is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfBoot is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifndef WOLFBOOT_DELTA_H
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#define WOLFBOOT_DELTA_H
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#include "target.h"
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#define DELTA_PATCH_BLOCK_SIZE 1024
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struct wb_patch_ctx {
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uint8_t *src_base;
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uint32_t src_size;
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uint8_t *patch_base;
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uint32_t patch_size;
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uint32_t p_off;
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int matching;
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uint32_t blk_sz;
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uint32_t blk_off;
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#ifdef EXT_FLASH
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uint8_t patch_cache[DELTA_PATCH_BLOCK_SIZE];
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uint32_t patch_cache_start;
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#endif
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};
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struct wb_diff_ctx {
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uint8_t *src_a;
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uint8_t *src_b;
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uint32_t size_a, size_b, off_b;
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};
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typedef struct wb_patch_ctx WB_PATCH_CTX;
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typedef struct wb_diff_ctx WB_DIFF_CTX;
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int wb_diff_init(WB_DIFF_CTX *ctx, uint8_t *src_a, uint32_t len_a, uint8_t *src_b, uint32_t len_b);
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int wb_diff(WB_DIFF_CTX *ctx, uint8_t *patch, uint32_t len);
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int wb_patch_init(WB_PATCH_CTX *bm, uint8_t *src, uint32_t ssz, uint8_t *patch, uint32_t psz);
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int wb_patch(WB_PATCH_CTX *ctx, uint8_t *dst, uint32_t len);
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int wolfBoot_get_delta_info(uint8_t part, int inverse, uint32_t **img_offset, uint32_t **img_size);
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#endif
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