X-Git-Url: https://git.cryptolib.org/?p=avr-crypto-lib.git;a=blobdiff_plain;f=bcal%2Fbcal-eax.c;fp=bcal%2Fbcal-eax.c;h=f36d3f0a19f8092668bdc8d8c8ce430231f2e143;hp=15c80a090a4b80a645998e4e179e40701e68f468;hb=8d1970350aa1d7cdcb59cf79f7f60e385e2816e5;hpb=a30df60ac814350db243b270034ef188c8d02d5e

diff --git a/bcal/bcal-eax.c b/bcal/bcal-eax.c
index 15c80a0..f36d3f0 100644
--- a/bcal/bcal-eax.c
+++ b/bcal/bcal-eax.c
@@ -1,22 +1,21 @@
 /* bca-eax.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 "bcal-basic.h"
@@ -26,94 +25,107 @@
 #include "bcal-eax.h"
 #include "memxor.h"
 
-uint8_t bcal_eax_init(const bcdesc_t *desc, const void *key, uint16_t keysize_b, bcal_eax_ctx_t *ctx){
-	uint8_t r;
-	ctx->blocksize_B = (bcal_cipher_getBlocksize_b(desc)+7)/8;
-	ctx->nonce = malloc(ctx->blocksize_B);
-	if(ctx->nonce==NULL){
-		return 0x81;
-	}
-	r = bcal_cmac_init(desc, key, keysize_b, &(ctx->ctag));
-	if(r){
-		return r;
-	}
-	r = bcal_cmac_init(desc, key, keysize_b, &(ctx->htag));
-	if(r){
-		return (r|0x10);
-	}
-	r = bcal_cmac_init(desc, key, keysize_b, &(ctx->ntag));
-	if(r){
-		return (r|0x20);
-	}
-	r = bcal_ctr_init(desc, key, keysize_b, NULL, &(ctx->cipher));
-	if(r){
-		return (r|0x30);
-	}
-	ctx->header_set=0;
-	uint8_t tmp[ctx->blocksize_B];
-	memset(tmp, 0, ctx->blocksize_B);
-	bcal_cmac_nextBlock(&(ctx->ntag), tmp);
-	tmp[ctx->blocksize_B-1]=1;
-	bcal_cmac_nextBlock(&(ctx->htag), tmp);
-	tmp[ctx->blocksize_B-1]=2;
-	bcal_cmac_nextBlock(&(ctx->ctag), tmp);
-	return 0;
+uint8_t bcal_eax_init(const bcdesc_t *desc, const void *key, uint16_t keysize_b,
+        bcal_eax_ctx_t *ctx)
+{
+    uint8_t r;
+    ctx->blocksize_B = (bcal_cipher_getBlocksize_b(desc) + 7) / 8;
+    ctx->nonce = malloc(ctx->blocksize_B);
+    if (ctx->nonce == NULL) {
+        return 0x81;
+    }
+    r = bcal_cmac_init(desc, key, keysize_b, &(ctx->ctag));
+    if (r) {
+        return r;
+    }
+    r = bcal_cmac_init(desc, key, keysize_b, &(ctx->htag));
+    if (r) {
+        return (r | 0x10);
+    }
+    r = bcal_cmac_init(desc, key, keysize_b, &(ctx->ntag));
+    if (r) {
+        return (r | 0x20);
+    }
+    r = bcal_ctr_init(desc, key, keysize_b, NULL, &(ctx->cipher));
+    if (r) {
+        return (r | 0x30);
+    }
+    ctx->header_set = 0;
+    uint8_t tmp[ctx->blocksize_B];
+    memset(tmp, 0, ctx->blocksize_B);
+    bcal_cmac_nextBlock(&(ctx->ntag), tmp);
+    tmp[ctx->blocksize_B - 1] = 1;
+    bcal_cmac_nextBlock(&(ctx->htag), tmp);
+    tmp[ctx->blocksize_B - 1] = 2;
+    bcal_cmac_nextBlock(&(ctx->ctag), tmp);
+    return 0;
 }
 
-void bcal_eax_free(bcal_eax_ctx_t *ctx){
-	bcal_ctr_free(&(ctx->cipher));
-	bcal_cmac_free(&(ctx->ctag));
-	bcal_cmac_free(&(ctx->htag));
-	bcal_cmac_free(&(ctx->ntag));
-	free(ctx->nonce);
+void bcal_eax_free(bcal_eax_ctx_t *ctx)
+{
+    bcal_ctr_free(&(ctx->cipher));
+    bcal_cmac_free(&(ctx->ctag));
+    bcal_cmac_free(&(ctx->htag));
+    bcal_cmac_free(&(ctx->ntag));
+    free(ctx->nonce);
 }
 
-void bcal_eax_loadNonce(const void *nonce, uint16_t length_b, bcal_eax_ctx_t *ctx){
-	bcal_cmac_lastBlock(&(ctx->ntag), nonce, length_b);
-	bcal_cmac_ctx2mac(ctx->nonce, ctx->blocksize_B*8, &(ctx->ntag));
-	bcal_ctr_loadIV(ctx->nonce, &(ctx->cipher));
+void bcal_eax_loadNonce(const void *nonce, uint16_t length_b,
+        bcal_eax_ctx_t *ctx)
+{
+    bcal_cmac_lastBlock(&(ctx->ntag), nonce, length_b);
+    bcal_cmac_ctx2mac(ctx->nonce, ctx->blocksize_B * 8, &(ctx->ntag));
+    bcal_ctr_loadIV(ctx->nonce, &(ctx->cipher));
 }
 
-void bcal_eax_addNextHeader(const void *header, bcal_eax_ctx_t *ctx){
-	bcal_cmac_nextBlock(&(ctx->htag), header);
+void bcal_eax_addNextHeader(const void *header, bcal_eax_ctx_t *ctx)
+{
+    bcal_cmac_nextBlock(&(ctx->htag), header);
 }
 
-void bcal_eax_addLastHeader(const void *header, uint16_t length_b, bcal_eax_ctx_t *ctx){
-	bcal_cmac_lastBlock(&(ctx->htag), header, length_b);
-	ctx->header_set = 1;
+void bcal_eax_addLastHeader(const void *header, uint16_t length_b,
+        bcal_eax_ctx_t *ctx)
+{
+    bcal_cmac_lastBlock(&(ctx->htag), header, length_b);
+    ctx->header_set = 1;
 }
 
-void bcal_eax_encNextBlock(void *block, bcal_eax_ctx_t *ctx){
-	bcal_ctr_encNext(block, &(ctx->cipher));
-	bcal_cmac_nextBlock(&(ctx->ctag), block);
+void bcal_eax_encNextBlock(void *block, bcal_eax_ctx_t *ctx)
+{
+    bcal_ctr_encNext(block, &(ctx->cipher));
+    bcal_cmac_nextBlock(&(ctx->ctag), block);
 }
 
-void bcal_eax_encLastBlock(void *block, uint16_t length_b, bcal_eax_ctx_t *ctx){
-	bcal_ctr_encMsg(NULL, block, length_b, &(ctx->cipher));
-	bcal_cmac_lastBlock(&(ctx->ctag), block, length_b);
+void bcal_eax_encLastBlock(void *block, uint16_t length_b, bcal_eax_ctx_t *ctx)
+{
+    bcal_ctr_encMsg(NULL, block, length_b, &(ctx->cipher));
+    bcal_cmac_lastBlock(&(ctx->ctag), block, length_b);
 }
 
-void bcal_eax_decNextBlock(void *block, bcal_eax_ctx_t *ctx){
-	bcal_cmac_nextBlock(&(ctx->ctag), block);
-	bcal_ctr_decNext(block, &(ctx->cipher));
+void bcal_eax_decNextBlock(void *block, bcal_eax_ctx_t *ctx)
+{
+    bcal_cmac_nextBlock(&(ctx->ctag), block);
+    bcal_ctr_decNext(block, &(ctx->cipher));
 }
 
-void bcal_eax_decLastBlock(void *block, uint16_t length_b, bcal_eax_ctx_t *ctx){
-	bcal_cmac_lastBlock(&(ctx->ctag), block, length_b);
-	bcal_ctr_decMsg(NULL, block, length_b, &(ctx->cipher));
+void bcal_eax_decLastBlock(void *block, uint16_t length_b, bcal_eax_ctx_t *ctx)
+{
+    bcal_cmac_lastBlock(&(ctx->ctag), block, length_b);
+    bcal_ctr_decMsg(NULL, block, length_b, &(ctx->cipher));
 }
 
-void bcal_eax_ctx2tag(void *dest, uint16_t length_b, bcal_eax_ctx_t *ctx){
-	uint8_t tmp[ctx->blocksize_B];
-	if(ctx->header_set==0){
-		bcal_cmac_lastBlock(&(ctx->htag), NULL, 0);
-	}
+void bcal_eax_ctx2tag(void *dest, uint16_t length_b, bcal_eax_ctx_t *ctx)
+{
+    uint8_t tmp[ctx->blocksize_B];
+    if (ctx->header_set == 0) {
+        bcal_cmac_lastBlock(&(ctx->htag), NULL, 0);
+    }
 
-	bcal_cmac_ctx2mac(tmp, ctx->blocksize_B*8, &(ctx->htag));
-	memxor(ctx->nonce, tmp, ctx->blocksize_B);
+    bcal_cmac_ctx2mac(tmp, ctx->blocksize_B * 8, &(ctx->htag));
+    memxor(ctx->nonce, tmp, ctx->blocksize_B);
 
-	bcal_cmac_ctx2mac(tmp, ctx->blocksize_B*8, &(ctx->ctag));
-	memxor(ctx->nonce, tmp, ctx->blocksize_B);
-	memcpy(dest, ctx->nonce, (length_b+7)/8);
+    bcal_cmac_ctx2mac(tmp, ctx->blocksize_B * 8, &(ctx->ctag));
+    memxor(ctx->nonce, tmp, ctx->blocksize_B);
+    memcpy(dest, ctx->nonce, (length_b + 7) / 8);
 }