/* bcal-cfb_byte.c */
/*
- This file is part of the AVR-Crypto-Lib.
- Copyright (C) 2010 Daniel Otte (daniel.otte@rub.de)
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2010 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 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/>.
-*/
+ 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 <stdint.h>
#include <string.h>
#include "bcal-basic.h"
#include "memxor.h"
-
-uint8_t bcal_cfb_B_init(const bcdesc_t *desc, const void *key, uint16_t keysize_b, uint16_t size_b, bcal_cfb_B_ctx_t *ctx){
- ctx->desc = (bcdesc_t*)desc;
- ctx->blocksize_B = (bcal_cipher_getBlocksize_b(desc)+7)/8;
- ctx->in_block=malloc(ctx->blocksize_B);
- if(ctx->in_block==NULL){
- return 0x11;
- }
- if(size_b&7){
- return 0x12;
- }
- ctx->size_B = size_b/8;
- return bcal_cipher_init(desc, key, keysize_b, &(ctx->cctx));
+uint8_t bcal_cfb_B_init(const bcdesc_t *desc, const void *key,
+ uint16_t keysize_b, uint16_t size_b, bcal_cfb_B_ctx_t *ctx)
+{
+ ctx->desc = (bcdesc_t*) desc;
+ ctx->blocksize_B = (bcal_cipher_getBlocksize_b(desc) + 7) / 8;
+ ctx->in_block = malloc(ctx->blocksize_B);
+ if (ctx->in_block == NULL) {
+ return 0x11;
+ }
+ if (size_b & 7) {
+ return 0x12;
+ }
+ ctx->size_B = size_b / 8;
+ return bcal_cipher_init(desc, key, keysize_b, &(ctx->cctx));
}
-void bcal_cfb_B_free(bcal_cfb_B_ctx_t *ctx){
- free(ctx->in_block);
- bcal_cipher_free(&(ctx->cctx));
+void bcal_cfb_B_free(bcal_cfb_B_ctx_t *ctx)
+{
+ free(ctx->in_block);
+ bcal_cipher_free(&(ctx->cctx));
}
-void bcal_cfb_B_loadIV(const void *iv, bcal_cfb_B_ctx_t *ctx){
- if(iv){
- memcpy(ctx->in_block, iv, ctx->blocksize_B);
- }
+void bcal_cfb_B_loadIV(const void *iv, bcal_cfb_B_ctx_t *ctx)
+{
+ if (iv) {
+ memcpy(ctx->in_block, iv, ctx->blocksize_B);
+ }
}
-void bcal_cfb_B_encNext(void *block, bcal_cfb_B_ctx_t *ctx){
- uint8_t tmp[ctx->blocksize_B];
- memcpy(tmp, ctx->in_block, ctx->blocksize_B);
- bcal_cipher_enc(tmp, &(ctx->cctx));
- memxor(block, tmp, ctx->size_B);
- memmove(ctx->in_block, ctx->in_block+ctx->size_B, ctx->blocksize_B - ctx->size_B);
- memcpy(ctx->in_block+ctx->blocksize_B-ctx->size_B, block, ctx->size_B);
+void bcal_cfb_B_encNext(void *block, bcal_cfb_B_ctx_t *ctx)
+{
+ uint8_t tmp[ctx->blocksize_B];
+ memcpy(tmp, ctx->in_block, ctx->blocksize_B);
+ bcal_cipher_enc(tmp, &(ctx->cctx));
+ memxor(block, tmp, ctx->size_B);
+ memmove(ctx->in_block, ctx->in_block + ctx->size_B, ctx->blocksize_B
+ - ctx->size_B);
+ memcpy(ctx->in_block + ctx->blocksize_B - ctx->size_B, block, ctx->size_B);
}
-void bcal_cfb_B_decNext(void *block, bcal_cfb_B_ctx_t *ctx){
- uint8_t tmp[ctx->blocksize_B];
- uint8_t xblock[ctx->size_B];
- memcpy(xblock, block, ctx->size_B);
- memcpy(tmp, ctx->in_block, ctx->blocksize_B);
- bcal_cipher_enc(tmp, &(ctx->cctx));
- memxor(block, tmp, ctx->size_B);
- memmove(ctx->in_block, ctx->in_block+ctx->size_B, ctx->blocksize_B - ctx->size_B);
- memcpy(ctx->in_block+ctx->blocksize_B-ctx->size_B, xblock, ctx->size_B);
+void bcal_cfb_B_decNext(void *block, bcal_cfb_B_ctx_t *ctx)
+{
+ uint8_t tmp[ctx->blocksize_B];
+ uint8_t xblock[ctx->size_B];
+ memcpy(xblock, block, ctx->size_B);
+ memcpy(tmp, ctx->in_block, ctx->blocksize_B);
+ bcal_cipher_enc(tmp, &(ctx->cctx));
+ memxor(block, tmp, ctx->size_B);
+ memmove(ctx->in_block, ctx->in_block + ctx->size_B, ctx->blocksize_B
+ - ctx->size_B);
+ memcpy(ctx->in_block + ctx->blocksize_B - ctx->size_B, xblock, ctx->size_B);
}
-void bcal_cfb_B_encMsg(const void *iv, void *msg, uint16_t msg_blocks, bcal_cfb_B_ctx_t *ctx){
- bcal_cfb_B_loadIV(iv, ctx);
- while(msg_blocks--){
- bcal_cfb_B_encNext(msg, ctx);
- msg = (uint8_t*)msg+ctx->size_B;
- }
+void bcal_cfb_B_encMsg(const void *iv, void *msg, uint16_t msg_blocks,
+ bcal_cfb_B_ctx_t *ctx)
+{
+ bcal_cfb_B_loadIV(iv, ctx);
+ while (msg_blocks--) {
+ bcal_cfb_B_encNext(msg, ctx);
+ msg = (uint8_t*) msg + ctx->size_B;
+ }
}
-void bcal_cfb_B_decMsg(const void *iv, void *msg, uint16_t msg_blocks, bcal_cfb_B_ctx_t *ctx){
- bcal_cfb_B_loadIV(iv, ctx);
- while(msg_blocks--){
- bcal_cfb_B_decNext(msg, ctx);
- msg = (uint8_t*)msg+ctx->size_B;
- }
+void bcal_cfb_B_decMsg(const void *iv, void *msg, uint16_t msg_blocks,
+ bcal_cfb_B_ctx_t *ctx)
+{
+ bcal_cfb_B_loadIV(iv, ctx);
+ while (msg_blocks--) {
+ bcal_cfb_B_decNext(msg, ctx);
+ msg = (uint8_t*) msg + ctx->size_B;
+ }
}
projects / avr-crypto-lib.git / blobdiff