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71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* ------------------------------------------------------------------------
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libcperm - A library for creating random permutations.
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Copyright (c) 2014, Lance Alt
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This file is part of libcperm.
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This library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by 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 library 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library. If not, see <http://www.gnu.org/licenses/>.
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------------------------------------------------------------------------
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*/
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#include <stdio.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 "../cperm.h"
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#include "../cperm-internal.h"
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#include "rc5-16.h"
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struct rc5_data {
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struct rc5_key key;
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uint32_t* blocks;
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uint32_t index;
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};
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int perm_rc5_create(struct cperm_t* pt) {
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struct rc5_data* d;
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if(pt->key_len != RC5_KEYLEN) {
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return PERM_ERROR_BAD_KEY_LENGTH;
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}
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d = malloc(sizeof(*d));
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memcpy(&d->key, pt->key, pt->key_len);
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pt->cipher_data = d;
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rc5_setup(pt->cipher_data);
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return 0;
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}
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int perm_rc5_destroy(struct cperm_t* pt) {
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free(pt->cipher_data);
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return 0;
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}
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int perm_rc5_enc(struct cperm_t* perm, uint32_t pt, uint32_t* ct) {
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struct rc5_data* d = perm->cipher_data;
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rc5_ecb_encrypt(&d->key, &pt, ct);
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return 0;
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}
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int perm_rc5_dec(struct cperm_t* perm, uint32_t ct, uint32_t* pt) {
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struct rc5_data* d = perm->cipher_data;
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rc5_ecb_decrypt(&d->key, &ct, pt);
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return 0;
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}
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