Mercurial > dropbear

annotate libtomcrypt/src/mac/hmac/hmac_process.c @ 1861:2b3a8026a6ce

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Add re-exec for server This allows ASLR to re-randomize the address space for every connection, preventing some vulnerabilities from being exploitable by repeated probing. Overhead (memory and time) is yet to be confirmed. At present this is only enabled on Linux. Other BSD platforms with fexecve() would probably also work though have not been tested.
author Matt Johnston <matt@ucc.asn.au>
date Sun, 30 Jan 2022 10:14:56 +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 hmac_process.c
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13 HMAC support, process data, Tom St Denis/Dobes Vandermeer
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14 */
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16 #ifdef LTC_HMAC
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17
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18 /**
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19 Process data through HMAC
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20 @param hmac The hmac state
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21 @param in The data to send through HMAC
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22 @param inlen The length of the data to HMAC (octets)
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23 @return CRYPT_OK if successful
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24 */
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25 int hmac_process(hmac_state *hmac, const unsigned char *in, unsigned long inlen)
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26 {
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27 int err;
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28 LTC_ARGCHK(hmac != NULL);
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29 LTC_ARGCHK(in != NULL);
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30 if ((err = hash_is_valid(hmac->hash)) != CRYPT_OK) {
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31 return err;
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32 }
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33 return hash_descriptor[hmac->hash].process(&hmac->md, in, inlen);
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34 }
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36 #endif
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38
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39 /* ref: $Format:%D$ */
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40 /* git commit: $Format:%H$ */
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41 /* commit time: $Format:%ai$ */