90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/* bcal-nessie.c */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "nessie_bc_test.h"
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#include "blockcipher_descriptor.h"
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#include "keysize_descriptor.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <avr/pgmspace.h>
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void (*bcal_nessie_dummy_init_fpt)(const void *key, void *ctx) = NULL;
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void bcal_nessie_dummy_init(const void *key, uint16_t keysize, void *ctx)
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{
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if (bcal_nessie_dummy_init_fpt) {
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bcal_nessie_dummy_init_fpt(key, ctx);
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} else {
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memcpy(ctx, key, (keysize + 7) / 8);
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}
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}
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void bcal_nessie(const bcdesc_t *bcd)
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{
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if (pgm_read_byte(&(bcd->type)) != BCDESC_TYPE_BLOCKCIPHER)
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return;
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char name[1 + strlen_P((void*) pgm_read_word(&(bcd->name)))];
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strcpy_P(name, (void*) pgm_read_word(&(bcd->name)));
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nessie_bc_init();
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nessie_bc_ctx.blocksize_B = (pgm_read_word(&(bcd->blocksize_b)) + 7) / 8;
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nessie_bc_ctx.name = name;
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nessie_bc_ctx.ctx_size_B = pgm_read_word(&(bcd->ctxsize_B));
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nessie_bc_ctx.cipher_enc = (nessie_bc_enc_fpt) pgm_read_word(&(bcd->enc));
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nessie_bc_ctx.cipher_dec = (nessie_bc_dec_fpt) pgm_read_word(&(bcd->dec));
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nessie_bc_ctx.cipher_free =
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(nessie_bc_free_fpt) pgm_read_word(&(bcd->free));
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if ((pgm_read_byte(&(bcd->flags)) & BC_INIT_TYPE) == BC_INIT_TYPE_2) {
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nessie_bc_ctx.cipher_genctx =
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(nessie_bc_gen_fpt) pgm_read_word(&(bcd->init));
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} else {
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bcal_nessie_dummy_init_fpt =
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(void (*)(const void*, void*)) pgm_read_word(&(bcd->init));
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nessie_bc_ctx.cipher_genctx =
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(nessie_bc_gen_fpt) bcal_nessie_dummy_init;
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}
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uint16_t *keysize_list = NULL;
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uint16_t items, i;
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items =
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get_keysizes((PGM_VOID_P) pgm_read_word(&(bcd->valid_keysize_desc)), &keysize_list);
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if (items) {
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for (i = 0; i < items; ++i) {
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nessie_bc_ctx.keysize_b = keysize_list[i];
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nessie_bc_run();
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}
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free(keysize_list);
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}
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}
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void bcal_nessie_multiple(const bcdesc_t * const *bcd_list)
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{
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const bcdesc_t *bcd;
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for (;;) {
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bcd = (void*) pgm_read_word(bcd_list);
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if (!bcd)
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return;
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bcal_nessie(bcd);
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bcd_list = (void*) ((uint8_t*) bcd_list + 2);
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}
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}
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