104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/* hfal-basic.c */
|
|
/*
|
|
This file is part of the AVR-Crypto-Lib.
|
|
Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
|
|
|
|
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/>.
|
|
*/
|
|
|
|
#include <avr/pgmspace.h>
|
|
#include "hashfunction_descriptor.h"
|
|
#include "hfal-basic.h"
|
|
#include <stdlib.h>
|
|
|
|
uint8_t hfal_hash_init(const hfdesc_t* hash_descriptor, hfgen_ctx_t* ctx){
|
|
hf_init_fpt f;
|
|
uint16_t tmp;
|
|
ctx->desc_ptr = (hfdesc_t*)hash_descriptor;
|
|
tmp = pgm_read_word(&(hash_descriptor->ctxsize_B));
|
|
if(!(ctx->ctx=malloc(tmp)))
|
|
return 3;
|
|
f= (hf_init_fpt)pgm_read_word(&(hash_descriptor->init));
|
|
f(ctx->ctx);
|
|
return 0;
|
|
}
|
|
|
|
void hfal_hash_nextBlock(hfgen_ctx_t* ctx, const void* block){
|
|
hf_nextBlock_fpt f;
|
|
hfdesc_t* x=(ctx->desc_ptr);
|
|
f =(hf_nextBlock_fpt)pgm_read_word(&(x->nextBlock));
|
|
f(ctx->ctx, block);
|
|
}
|
|
|
|
void hfal_hash_lastBlock(hfgen_ctx_t* ctx, const void* block, uint16_t length_b){
|
|
hf_lastBlock_fpt f;
|
|
hfdesc_t* x=ctx->desc_ptr;
|
|
f =(hf_lastBlock_fpt)pgm_read_word(&(x->lastBlock));
|
|
f(ctx->ctx, block, length_b);
|
|
}
|
|
|
|
void hfal_hash_ctx2hash(void* dest, hfgen_ctx_t* ctx){
|
|
hf_ctx2hash_fpt f;
|
|
hfdesc_t* x=ctx->desc_ptr;
|
|
f =(hf_ctx2hash_fpt)pgm_read_word(&(x->ctx2hash));
|
|
f(dest, ctx->ctx);
|
|
}
|
|
|
|
void hfal_hash_free(hfgen_ctx_t* ctx){
|
|
hf_free_fpt f;
|
|
hfdesc_t* x=ctx->desc_ptr;
|
|
f =(hf_free_fpt)pgm_read_word(&(x->free));
|
|
if(f)
|
|
f(ctx->ctx);
|
|
free(ctx->ctx);
|
|
}
|
|
|
|
void hfal_hash_mem(const hfdesc_t* hash_descriptor, void* dest, const void* msg, uint32_t length_b){
|
|
void_fpt f;
|
|
f = (void_fpt)pgm_read_word(&(hash_descriptor->mem));
|
|
if(f){
|
|
((hf_mem_fpt)f)(dest, msg, length_b);
|
|
}else{
|
|
|
|
uint16_t bs,bsb;
|
|
uint8_t ctx[pgm_read_word(&(hash_descriptor->ctxsize_B))];
|
|
f=(void_fpt)pgm_read_word(&(hash_descriptor->init));
|
|
((hf_init_fpt)f)(ctx);
|
|
bs=pgm_read_word(&(hash_descriptor->blocksize_b));
|
|
bsb=bs/8;
|
|
f=(void_fpt)pgm_read_word(&(hash_descriptor->nextBlock));
|
|
while(length_b>=bs){
|
|
((hf_nextBlock_fpt)f)(ctx, msg);
|
|
length_b -= bs;
|
|
msg = (uint8_t*)msg + bsb;
|
|
}
|
|
f=(void_fpt)pgm_read_word(&(hash_descriptor->lastBlock));
|
|
((hf_lastBlock_fpt)f)(ctx, msg, length_b);
|
|
f=(void_fpt)pgm_read_word(&(hash_descriptor->ctx2hash));
|
|
((hf_ctx2hash_fpt)f)(dest, ctx);
|
|
}
|
|
}
|
|
|
|
uint16_t hfal_hash_getBlocksize(const hfdesc_t* hash_descriptor){
|
|
uint16_t ret;
|
|
ret = pgm_read_word(&(hash_descriptor->blocksize_b));
|
|
return ret;
|
|
}
|
|
|
|
uint16_t hfal_hash_getHashsize(const hfdesc_t* hash_descriptor){
|
|
uint16_t ret;
|
|
ret = pgm_read_word(&(hash_descriptor->hashsize_b));
|
|
return ret;
|
|
}
|