109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/* hfal-basic.c */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <avr/pgmspace.h>
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#include "hashfunction_descriptor.h"
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#include "hfal-basic.h"
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#include <stdlib.h>
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uint8_t hfal_hash_init(const hfdesc_t *hash_descriptor, hfgen_ctx_t *ctx){
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hf_init_fpt f;
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uint16_t tmp;
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ctx->desc_ptr = (hfdesc_t*)hash_descriptor;
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tmp = pgm_read_word(&(hash_descriptor->ctxsize_B));
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if(!(ctx->ctx=malloc(tmp)))
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return 3;
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f= (hf_init_fpt)pgm_read_word(&(hash_descriptor->init));
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f(ctx->ctx);
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return 0;
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}
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void hfal_hash_nextBlock(hfgen_ctx_t *ctx, const void *block){
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hf_nextBlock_fpt f;
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hfdesc_t *x=(ctx->desc_ptr);
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f =(hf_nextBlock_fpt)pgm_read_word(&(x->nextBlock));
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f(ctx->ctx, block);
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}
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void hfal_hash_lastBlock(hfgen_ctx_t *ctx, const void *block, uint16_t length_b){
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hf_lastBlock_fpt f;
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hfdesc_t *x=ctx->desc_ptr;
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f =(hf_lastBlock_fpt)pgm_read_word(&(x->lastBlock));
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f(ctx->ctx, block, length_b);
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}
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void hfal_hash_ctx2hash(void *dest, hfgen_ctx_t *ctx){
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hf_ctx2hash_fpt f;
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hfdesc_t *x=ctx->desc_ptr;
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f =(hf_ctx2hash_fpt)pgm_read_word(&(x->ctx2hash));
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f(dest, ctx->ctx);
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}
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void hfal_hash_free(hfgen_ctx_t *ctx){
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hf_free_fpt f;
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hfdesc_t *x=ctx->desc_ptr;
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f =(hf_free_fpt)pgm_read_word(&(x->free));
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if(f)
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f(ctx->ctx);
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free(ctx->ctx);
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}
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void hfal_hash_mem(const hfdesc_t *hash_descriptor, void *dest, const void *msg, uint32_t length_b){
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void_fpt f;
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f = (void_fpt)pgm_read_word(&(hash_descriptor->mem));
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if(f){
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((hf_mem_fpt)f)(dest, msg, length_b);
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}else{
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uint16_t bs,bsb;
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uint8_t ctx[pgm_read_word(&(hash_descriptor->ctxsize_B))];
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f=(void_fpt)(pgm_read_word(&(hash_descriptor->init)));
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((hf_init_fpt)f)(ctx);
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bs=pgm_read_word(&(hash_descriptor->blocksize_b));
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bsb=bs/8;
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f=(void_fpt)(pgm_read_word(&(hash_descriptor->nextBlock)));
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while(length_b>bs){
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((hf_nextBlock_fpt)f)(ctx, msg);
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length_b -= bs;
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msg = (uint8_t*)msg + bsb;
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}
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f=(void_fpt)(pgm_read_word(&(hash_descriptor->lastBlock)));
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((hf_lastBlock_fpt)f)(ctx, msg, length_b);
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f=(void_fpt)(pgm_read_word(&(hash_descriptor->ctx2hash)));
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((hf_ctx2hash_fpt)f)(dest, ctx);
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}
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}
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uint16_t hfal_hash_getBlocksize(const hfdesc_t *hash_descriptor){
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uint16_t ret;
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ret = pgm_read_word(&(hash_descriptor->blocksize_b));
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return ret;
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}
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uint16_t hfal_hash_getHashsize(const hfdesc_t *hash_descriptor){
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uint16_t ret;
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ret = pgm_read_word(&(hash_descriptor->hashsize_b));
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return ret;
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}
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uint16_t hfal_hash_getCtxsize_B(const hfdesc_t *hash_descriptor){
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uint16_t ret;
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ret = pgm_read_word(&(hash_descriptor->ctxsize_B));
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return ret;
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}
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