Mercurial > dropbear

annotate libtomcrypt/src/mac/f9/f9_memory.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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
382
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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 f9_process.c
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13 f9 Support, Process a block through F9-MAC
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14 */
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15
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16 #ifdef LTC_F9_MODE
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17
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents: 1435
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18 /** f9-MAC a block of memory
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19 @param cipher Index of cipher to use
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20 @param key [in] Secret key
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21 @param keylen Length of key in octets
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22 @param in [in] Message to MAC
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23 @param inlen Length of input in octets
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24 @param out [out] Destination for the MAC tag
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25 @param outlen [in/out] Output size and final tag size
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26 Return CRYPT_OK on success.
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27 */
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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28 int f9_memory(int cipher,
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29 const unsigned char *key, unsigned long keylen,
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30 const unsigned char *in, unsigned long inlen,
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31 unsigned char *out, unsigned long *outlen)
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32 {
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33 f9_state *f9;
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34 int err;
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35
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36 /* is the cipher valid? */
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37 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
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38 return err;
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39 }
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40
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41 /* Use accelerator if found */
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42 if (cipher_descriptor[cipher].f9_memory != NULL) {
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43 return cipher_descriptor[cipher].f9_memory(key, keylen, in, inlen, out, outlen);
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44 }
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45
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46 f9 = XCALLOC(1, sizeof(*f9));
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47 if (f9 == NULL) {
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48 return CRYPT_MEM;
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49 }
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50
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51 if ((err = f9_init(f9, cipher, key, keylen)) != CRYPT_OK) {
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52 goto done;
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53 }
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54
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55 if ((err = f9_process(f9, in, inlen)) != CRYPT_OK) {
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56 goto done;
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57 }
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58
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59 err = f9_done(f9, out, outlen);
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60 done:
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61 XFREE(f9);
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62 return err;
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63 }
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64
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65 #endif
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66
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents: 1435
diff changeset
67 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
68 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
69 /* commit time: $Format:%ai$ */