Mercurial > dropbear

annotate libtomcrypt/src/hashes/helper/hash_file.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 1ff2a1034c52
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
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11 #ifndef LTC_NO_FILE
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12 /**
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13 @file hash_file.c
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14 Hash a file, Tom St Denis
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15 */
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17 /**
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18 @param hash The index of the hash desired
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19 @param fname The name of the file you wish to hash
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20 @param out [out] The destination of the digest
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21 @param outlen [in/out] The max size and resulting size of the message digest
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22 @result CRYPT_OK if successful
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23 */
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24 int hash_file(int hash, const char *fname, unsigned char *out, unsigned long *outlen)
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25 {
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26 FILE *in;
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27 int err;
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28 LTC_ARGCHK(fname != NULL);
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29 LTC_ARGCHK(out != NULL);
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30 LTC_ARGCHK(outlen != NULL);
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32 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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33 return err;
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34 }
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36 in = fopen(fname, "rb");
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37 if (in == NULL) {
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38 return CRYPT_FILE_NOTFOUND;
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39 }
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41 err = hash_filehandle(hash, in, out, outlen);
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42 if (fclose(in) != 0) {
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43 return CRYPT_ERROR;
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44 }
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46 return err;
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47 }
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48 #endif /* #ifndef LTC_NO_FILE */
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50
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51 /* ref: $Format:%D$ */
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52 /* git commit: $Format:%H$ */
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53 /* commit time: $Format:%ai$ */