annotate ctr_setiv.c @ 138:b1edc9158f6c libtomcrypt

Pristine compilation works
author Matt Johnston <matt@ucc.asn.au>
date Fri, 17 Dec 2004 06:27:09 +0000
parents 6362d3854bb4
children 5d99163f7e32
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 *
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9 * Tom St Denis, [email protected], http://libtomcrypt.org
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10 */
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12 #include "mycrypt.h"
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14 #ifdef CTR
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16 int ctr_setiv(const unsigned char *IV, unsigned long len, symmetric_CTR *ctr)
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17 {
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18 int err;
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20 _ARGCHK(IV != NULL);
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21 _ARGCHK(ctr != NULL);
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23 /* bad param? */
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24 if ((err = cipher_is_valid(ctr->cipher)) != CRYPT_OK) {
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25 return err;
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26 }
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28 if (len != (unsigned long)ctr->blocklen) {
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29 return CRYPT_INVALID_ARG;
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30 }
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32 /* set IV */
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33 memcpy(ctr->ctr, IV, len);
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35 /* force next block */
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36 ctr->padlen = 0;
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37 cipher_descriptor[ctr->cipher].ecb_encrypt(IV, ctr->pad, &ctr->key);
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39 return CRYPT_OK;
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40 }
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42 #endif
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43