forgotten directories

[avr-crypto-lib.git] / hfal / hfal-basic.c

diff --git a/hfal/hfal-basic.c b/hfal/hfal-basic.c
new file mode 100644 (file)
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+++ b/hfal/hfal-basic.c
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+/* 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;
+}