Mercurial > dropbear

annotate libtomcrypt/src/encauth/eax/eax_encrypt.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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10 /**
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11 @file eax_encrypt.c
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12 EAX implementation, encrypt block by Tom St Denis
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13 */
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14 #include "tomcrypt.h"
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15
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16 #ifdef LTC_EAX_MODE
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18 /**
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19 Encrypt with EAX a block of data.
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20 @param eax The EAX state
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21 @param pt The plaintext to encrypt
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22 @param ct [out] The ciphertext as encrypted
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23 @param length The length of the plaintext (octets)
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24 @return CRYPT_OK if successful
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25 */
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26 int eax_encrypt(eax_state *eax, const unsigned char *pt, unsigned char *ct,
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27 unsigned long length)
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28 {
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29 int err;
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31 LTC_ARGCHK(eax != NULL);
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32 LTC_ARGCHK(pt != NULL);
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33 LTC_ARGCHK(ct != NULL);
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35 /* encrypt */
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36 if ((err = ctr_encrypt(pt, ct, length, &eax->ctr)) != CRYPT_OK) {
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37 return err;
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38 }
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40 /* omac ciphertext */
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41 return omac_process(&eax->ctomac, ct, length);
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42 }
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44 #endif
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46
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47 /* ref: $Format:%D$ */
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48 /* git commit: $Format:%H$ */
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49 /* commit time: $Format:%ai$ */