--- /dev/null
+/* bcal-basic.c */
+/*
+ This file is part of the Crypto-avr-lib/microcrypt-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 <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include "blockcipher_descriptor.h"
+#include "keysize_descriptor.h"
+
+
+uint8_t bcal_cipher_init(const bcdesc_t* cipher_descriptor,
+ const void* key, uint16_t keysize, bcgen_ctx_t* ctx){
+ if(!is_valid_keysize_P((PGM_VOID_P)(pgm_read_word(cipher_descriptor->valid_keysize_desc)),
+ keysize))
+ return 1;
+
+ uint8_t flags;
+ bc_init_fpt init_fpt;
+ ctx->desc_ptr = (bcdesc_t*)cipher_descriptor;
+ ctx->keysize = keysize;
+ flags = pgm_read_byte(cipher_descriptor->flags);
+ init_fpt.initvoid = (void_fpt)(pgm_read_word(cipher_descriptor->init.initvoid));
+ if(init_fpt.initvoid == NULL){
+ if(!(ctx->ctx = malloc(keysize/8)))
+ return 2;
+ memcpy(ctx->ctx, key, keysize/8);
+ return 0;
+ }
+ if(!(ctx->ctx = malloc(pgm_read_word(cipher_descriptor->ctxsize_B))))
+ return 3;
+ if((flags&BC_INIT_TYPE)==BC_INIT_TYPE_1){
+ init_fpt.init1((void*)key, ctx->ctx);
+ }else{
+ init_fpt.init2((void*)key, keysize, ctx->ctx);
+ }
+ return 0;
+}
+
+void bcal_cipher_free(bcgen_ctx_t* ctx){
+ if(!ctx)
+ return;
+ bc_free_fpt free_fpt;
+ free_fpt = (bc_free_fpt)(pgm_read_word(ctx->desc_ptr->free));
+ if(free_fpt)
+ free_fpt(ctx->ctx);
+ free(ctx->ctx);
+}
+
+void bcal_cipher_enc(void* block, const bcgen_ctx_t* ctx){
+ uint8_t flags;
+ bc_enc_fpt enc_fpt;
+ flags = pgm_read_byte(ctx->desc_ptr->flags);
+ enc_fpt.encvoid = (void_fpt)pgm_read_word(ctx->desc_ptr->enc.encvoid);
+ if(!enc_fpt.encvoid){
+ /* very bad error, no enciphering function specified */
+ return;
+ }
+ if((flags&BC_ENC_TYPE)==BC_ENC_TYPE_1){
+ enc_fpt.enc1(block, ctx->ctx);
+ }else{
+ enc_fpt.enc2(block, block, ctx->ctx);
+ }
+}
+
+void bcal_cipher_dec(void* block, const bcgen_ctx_t* ctx){
+ uint8_t flags;
+ bc_dec_fpt dec_fpt;
+ flags = pgm_read_byte(ctx->desc_ptr->flags);
+ dec_fpt.decvoid = (void_fpt)pgm_read_word(ctx->desc_ptr->dec.decvoid);
+ if(!dec_fpt.decvoid){
+ /* very bad error, no deciphering function specified */
+ return;
+ }
+ if((flags&BC_DEC_TYPE)==BC_DEC_TYPE_1){
+ dec_fpt.dec1(block, ctx->ctx);
+ }else{
+ dec_fpt.dec2(block, block, ctx->ctx);
+ }
+}
+
+
+
--- /dev/null
+/* bcal-basic.h */
+/*
+ This file is part of the Crypto-avr-lib/microcrypt-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 <stdlib.h>
+#include <stdint.h>
+#include "blockciper_descriptor.h"
+#include "keysize_descriptor.h"
+
+
--- /dev/null
+/* bcal_noekeon.c */
+
+#include <avr/pgmspace.h>
+#include <stdlib.h>
+#include "blockcipher_descriptor.h"
+#include "noekeon.h"
+#include "keysize_descriptor.h"
+
+const char noekeon_direct_str[] PROGMEM = "Noekeon-Direct";
+const char noekeon_indirect_str[] PROGMEM = "Noekeon-Indirect";
+
+const uint8_t noekeon_keysize_desc[] PROGMEM = { KS_TYPE_LIST, 1, 128,
+ KS_TYPE_TERMINATOR };
+
+const bcdesc_t noekeon_direct_desc PROGMEM = {
+ BCDESC_TYPE_BLOCKCIPHER,
+ BC_ENC_TYPE_1,
+ noekeon_direct_str,
+ 16,
+ 128,
+ (void_fpt)NULL,
+ (void_fpt)noekeon_enc,
+ (void_fpt)noekeon_dec,
+ (void_fpt)NULL,
+ noekeon_keysize_desc
+};
+
+const bcdesc_t noekeon_indirect_desc PROGMEM = {
+ BCDESC_TYPE_BLOCKCIPHER,
+ BC_INIT_TYPE_1 | BC_ENC_TYPE_1,
+ noekeon_indirect_str,
+ 16,
+ 128,
+ (void_fpt)noekeon_init,
+ (void_fpt)noekeon_enc,
+ (void_fpt)noekeon_dec,
+ (void_fpt)NULL,
+ noekeon_keysize_desc
+};
+
+
--- /dev/null
+/* bcal_noekeon.h */
+
+#include <avr/pgmspace.h>
+#include "blopckcipher_descriptor.h"
+#include "noekeon.h"
+#include "keysize_descriptor.h"
+
+extern const bcdesc_t noekeon_direct_desc;
+extern const bcdesc_t noekeon_indirect_desc;
+
--- /dev/null
+/* blockcipher_descriptor.h */
+
+#ifndef BLOCKCIPHER_DESCRIPTOR_H_
+#define BLOCKCIPHER_DESCRIPTOR_H_
+#include <stdint.h>
+#include <avr/pgmspace.h>
+
+typedef void(*void_fpt)(void);
+typedef void(*bc_init1_fpt)(void*, void*);
+typedef void(*bc_init2_fpt)(void*, uint16_t,void*);
+typedef void(*bc_enc1_fpt)(void*, void*);
+typedef void(*bc_enc2_fpt)(void*, void*, void*);
+typedef void(*bc_dec1_fpt)(void*, void*);
+typedef void(*bc_dec2_fpt)(void*, void*, void*);
+typedef void(*bc_free_fpt)(void*);
+
+typedef union{
+ void_fpt initvoid;
+ bc_init1_fpt init1;
+ bc_init2_fpt init2;
+} bc_init_fpt;
+
+typedef union{
+ void_fpt encvoid;
+ bc_enc1_fpt enc1;
+ bc_enc2_fpt enc2;
+} bc_enc_fpt;
+
+typedef union{
+ void_fpt decvoid;
+ bc_dec1_fpt dec1;
+ bc_dec2_fpt dec2;
+} bc_dec_fpt;
+
+#define BC_INIT_TYPE 0x01
+#define BC_INIT_TYPE_1 0x00
+#define BC_INIT_TYPE_2 0x01
+
+#define BC_ENC_TYPE 0x02
+#define BC_ENC_TYPE_1 0x00
+#define BC_ENC_TYPE_2 0x02
+#
+#define BC_DEC_TYPE 0x04
+#define BC_DEC_TYPE_1 0x00
+#define BC_DEC_TYPE_2 0x04
+
+#define BCDESC_TYPE_BLOCKCIPHER 0x01
+
+typedef struct {
+ uint8_t type; /* 1==blockcipher */
+ uint8_t flags;
+ PGM_P name;
+ uint16_t ctxsize_B;
+ uint16_t blocksize_b;
+ bc_init_fpt init;
+ bc_enc_fpt enc;
+ bc_dec_fpt dec;
+ bc_free_fpt free;
+ PGM_VOID_P valid_keysize_desc;
+} bcdesc_t; /* blockcipher descriptor type */
+
+typedef struct{
+ bcdesc_t* desc_ptr;
+ uint16_t keysize;
+ void* ctx;
+} bcgen_ctx_t;
+
+#endif /* BLOCKCIPHER_DESCRIPTOR_H_ */
+
--- /dev/null
+/* keysize_descriptor.c */
+/*
+ This file is part of the Crypto-avr-lib/microcrypt-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/>.
+*/
+/**
+ * \file keysize_descriptor.c
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2009-01-07
+ * \license GPLv3 or later
+ */
+
+#include <stdint.h>
+#include <avr/pgmspace.h>
+#include "keysize_descriptor.h"
+
+uint8_t is_valid_keysize_P(PGM_VOID_P ks_desc, uint16_t keysize){
+ uint8_t type;
+ type = pgm_read_byte(ks_desc++);
+ if(type==KS_TYPE_TERMINATOR)
+ return 0;
+ if(type==KS_TYPE_LIST){
+ uint8_t items;
+ uint16_t item;
+ items = pgm_read_byte(ks_desc++);
+ while(items--){
+ item = pgm_read_word(ks_desc);
+ ks_desc+=2;
+ if(item==keysize)
+ return 1;
+ }
+ ks_desc -= 2;
+ }
+ if(type==KS_TYPE_RANGE){
+ uint16_t max, min;
+ min = pgm_read_word(ks_desc);
+ ks_desc+=2;
+ max = pgm_read_word(ks_desc);
+ if(min<=keysize && keysize<=max)
+ return 1;
+ }
+ if(type==KS_TYPE_ARG_RANGE){
+ uint16_t max, min, dist, offset;
+ min = pgm_read_word(ks_desc);
+ ks_desc+=2;
+ max = pgm_read_word(ks_desc);
+ ks_desc+=2;
+ dist = pgm_read_word(ks_desc);
+ ks_desc+=2;
+ offset = pgm_read_word(ks_desc);
+ if(min<=keysize && keysize<=max && (keysize%dist==offset))
+ return 1;
+ }
+ if(type>KS_TYPE_ARG_RANGE){
+ /* bad error, you may insert a big warning message here */
+ return 0;
+ }
+ return is_valid_keysize(ks_desc+1, keysize) /* search the next record */
+}
+
+
--- /dev/null
+/* keysize_descriptor.h */
+/*
+ This file is part of the Crypto-avr-lib/microcrypt-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/>.
+*/
+/**
+ * \file keysize_descriptor.h
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2009-01-07
+ * \license GPLv3 or later
+ */
+
+#ifndef KEYSIZE_DESCRIPTOR_H_
+#define KEYSIZE_DESCRIPTOR_H_
+
+#include <stdint.h>
+#include <avr/pgmspace.h>
+
+#define KS_TYPE_TERMINATOR 0x00
+#define KS_TYPE_LIST 0x01
+#define KS_TYPE_RANGE 0x02
+#define KS_TYPE_ARG_RANGE 0x03
+
+
+typedef struct{ /* keysize is valid if listed in items */
+ uint8_t n_items; /* number of items (value 0 is reserved) */
+ uint16_t items[]; /* list of valid lengths */
+}keysize_desc_list_t;
+
+typedef struct{ /* keysize is valid if min<=keysize<=max */
+ uint16_t min;
+ uint16_t max;
+}keysize_desc_range_t;
+
+typedef struct{ /* keysize is valid if min<=keysize<=max and if keysize mod distance == offset */
+ uint16_t min;
+ uint16_t max;
+ uint16_t distance;
+ uint16_t offset;
+}keysize_desc_arg_range_t;
+
+uint8_t is_valid_keysize_P(PGM_VOID_P ks_desc, uint16_t keysize);
+
+#endif /* KEYSIZE_DESCRIPTOR_H_ */
projects / avr-crypto-lib.git / commitdiff