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annotate libtomcrypt/src/math/radix_to_bin.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
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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 radix_to_bin.c
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13 Convert data from a specific radix to binary.
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14 Steffen Jaeckel
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15 */
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16
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17 /**
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18 Convert data from a specific radix to binary
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19
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20 The default MPI descriptors #ltm_desc, #tfm_desc and #gmp_desc
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21 have the following restrictions on parameters:
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22
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23 \p in - NUL-terminated char buffer
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24
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25 \p radix - 2..64
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26
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27 @param in The input
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28 @param radix The radix of the input
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29 @param out The output buffer
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30 @param len [in/out] The length of the output buffer
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31
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32 @return CRYPT_OK on success.
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33 */
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34 int radix_to_bin(const void *in, int radix, void *out, unsigned long *len)
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35 {
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36 unsigned long l;
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37 void* mpi;
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38 int err;
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39
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40 LTC_ARGCHK(in != NULL);
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41 LTC_ARGCHK(len != NULL);
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42
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43 if ((err = mp_init(&mpi)) != CRYPT_OK) return err;
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44 if ((err = mp_read_radix(mpi, in, radix)) != CRYPT_OK) goto LBL_ERR;
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45
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46 if ((l = mp_unsigned_bin_size(mpi)) > *len) {
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47 *len = l;
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48 err = CRYPT_BUFFER_OVERFLOW;
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49 goto LBL_ERR;
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50 }
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51 *len = l;
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52
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53 if ((err = mp_to_unsigned_bin(mpi, out)) != CRYPT_OK) goto LBL_ERR;
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54
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55 LBL_ERR:
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56 mp_clear(mpi);
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57 return err;
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58 }
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59
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60 /* ref: $Format:%D$ */
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61 /* git commit: $Format:%H$ */
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62 /* commit time: $Format:%ai$ */