Mercurial > dropbear

annotate crypt_register_prng.c @ 16:09ab3354aa21 libtomcrypt

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propagate of e8bea23df30f9f46c647d06db3b223427b4e3604 and b0b6b4a8843b94d9f049cb5ffe0b1ae91ec1bf8b from branch 'au.asn.ucc.matt.ltc-orig' to 'au.asn.ucc.matt.ltc-db'
author Matt Johnston <matt@ucc.asn.au>
date Tue, 15 Jun 2004 14:27:14 +0000
parents d7da3b1e1540
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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11 #include "mycrypt.h"
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12
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13 int register_prng(const struct _prng_descriptor *prng)
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14 {
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15 int x;
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16
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17 _ARGCHK(prng != NULL);
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18
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19 /* is it already registered? */
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20 for (x = 0; x < TAB_SIZE; x++) {
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21 if (memcmp(&prng_descriptor[x], prng, sizeof(struct _prng_descriptor)) == 0) {
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22 return x;
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23 }
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24 }
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25
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26 /* find a blank spot */
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27 for (x = 0; x < TAB_SIZE; x++) {
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28 if (prng_descriptor[x].name == NULL) {
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29 memcpy(&prng_descriptor[x], prng, sizeof(struct _prng_descriptor));
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30 return x;
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31 }
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32 }
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33
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34 /* no spot */
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35 return -1;
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36 }