Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/boolean/der_decode_boolean.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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10
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11 /**
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12 @file der_decode_boolean.c
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13 ASN.1 DER, decode a BOOLEAN, Tom St Denis
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14 */
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17 #ifdef LTC_DER
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19 /**
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20 Read a BOOLEAN
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21 @param in The destination for the DER encoded BOOLEAN
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22 @param inlen The size of the DER BOOLEAN
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23 @param out [out] The boolean to decode
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24 @return CRYPT_OK if successful
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25 */
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26 int der_decode_boolean(const unsigned char *in, unsigned long inlen,
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27 int *out)
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28 {
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29 LTC_ARGCHK(in != NULL);
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30 LTC_ARGCHK(out != NULL);
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31
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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32 if (inlen < 3 || in[0] != 0x01 || in[1] != 0x01 || (in[2] != 0x00 && in[2] != 0xFF)) {
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33 return CRYPT_INVALID_ARG;
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34 }
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35
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36 *out = (in[2]==0xFF) ? 1 : 0;
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37
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38 return CRYPT_OK;
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39 }
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41 #endif
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42
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43 /* ref: $Format:%D$ */
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44 /* git commit: $Format:%H$ */
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45 /* commit time: $Format:%ai$ */