Mercurial > dropbear

annotate libtomcrypt/src/math/multi.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 e9dba7abd939
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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11 #ifdef LTC_MPI
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12 #include <stdarg.h>
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13
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14 int ltc_init_multi(void **a, ...)
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15 {
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16 void **cur = a;
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17 int np = 0;
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18 va_list args;
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19
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20 va_start(args, a);
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21 while (cur != NULL) {
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22 if (mp_init(cur) != CRYPT_OK) {
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23 /* failed */
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24 va_list clean_list;
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25
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26 va_start(clean_list, a);
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27 cur = a;
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28 while (np--) {
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29 mp_clear(*cur);
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30 cur = va_arg(clean_list, void**);
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31 }
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32 va_end(clean_list);
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6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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33 va_end(args);
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34 return CRYPT_MEM;
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35 }
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36 ++np;
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37 cur = va_arg(args, void**);
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38 }
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39 va_end(args);
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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40 return CRYPT_OK;
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41 }
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42
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43 void ltc_deinit_multi(void *a, ...)
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44 {
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45 void *cur = a;
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46 va_list args;
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47
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48 va_start(args, a);
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49 while (cur != NULL) {
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50 mp_clear(cur);
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51 cur = va_arg(args, void *);
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52 }
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53 va_end(args);
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54 }
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55
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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56 void ltc_cleanup_multi(void **a, ...)
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57 {
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58 void **cur = a;
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59 va_list args;
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60
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61 va_start(args, a);
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62 while (cur != NULL) {
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63 if (*cur != NULL) {
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64 mp_clear(*cur);
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65 *cur = NULL;
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66 }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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67 cur = va_arg(args, void**);
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68 }
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69 va_end(args);
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70 }
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71
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72 #endif
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73
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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74 /* ref: $Format:%D$ */
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75 /* git commit: $Format:%H$ */
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76 /* commit time: $Format:%ai$ */