Mercurial > dropbear

annotate libtomcrypt/src/misc/crypt/crypt_register_prng.c @ 1853:2be3115a8762

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debugging test runner authorized_keys perms
author Matt Johnston <matt@ucc.asn.au>
date Tue, 19 Oct 2021 13:45:59 +0800
parents 6dba84798cd5
children
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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 #include "tomcrypt.h"
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11 /**
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12 @file crypt_register_prng.c
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13 Register a PRNG, Tom St Denis
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14 */
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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16 /**
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17 Register a PRNG with the descriptor table
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18 @param prng The PRNG you wish to register
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19 @return value >= 0 if successfully added (or already present), -1 if unsuccessful
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20 */
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21 int register_prng(const struct ltc_prng_descriptor *prng)
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22 {
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23 int x;
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25 LTC_ARGCHK(prng != NULL);
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27 /* is it already registered? */
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28 LTC_MUTEX_LOCK(&ltc_prng_mutex);
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29 for (x = 0; x < TAB_SIZE; x++) {
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30 if (XMEMCMP(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor)) == 0) {
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31 LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
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32 return x;
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33 }
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34 }
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36 /* find a blank spot */
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37 for (x = 0; x < TAB_SIZE; x++) {
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38 if (prng_descriptor[x].name == NULL) {
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39 XMEMCPY(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor));
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40 LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
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41 return x;
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42 }
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43 }
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45 /* no spot */
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46 LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
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47 return -1;
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48 }
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49
1471
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50 /* ref: $Format:%D$ */
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51 /* git commit: $Format:%H$ */
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52 /* commit time: $Format:%ai$ */