Mercurial > dropbear

annotate libtomcrypt/src/hashes/helper/hash_file.c @ 1333:6fafb500de88

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reduce buf->pos if shrinking
author Matt Johnston <matt@ucc.asn.au>
date Sat, 13 May 2017 23:43:09 +0800
parents eef377591301
children f849a5ca2efc
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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 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11 #include "tomcrypt.h"
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13 /**
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14 @file hash_file.c
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15 Hash a file, Tom St Denis
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16 */
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18 /**
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19 @param hash The index of the hash desired
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20 @param fname The name of the file you wish to hash
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21 @param out [out] The destination of the digest
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22 @param outlen [in/out] The max size and resulting size of the message digest
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23 @result CRYPT_OK if successful
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24 */
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25 int hash_file(int hash, const char *fname, unsigned char *out, unsigned long *outlen)
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26 {
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27 #ifdef LTC_NO_FILE
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eef377591301 Fix unused parameters warnings [-Werror=unused-parameter]
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28 (void)hash; (void)fname; (void)out; (void)outlen;
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29 return CRYPT_NOP;
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30 #else
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31 FILE *in;
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32 int err;
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33 LTC_ARGCHK(fname != NULL);
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34 LTC_ARGCHK(out != NULL);
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35 LTC_ARGCHK(outlen != NULL);
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36
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37 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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38 return err;
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39 }
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41 in = fopen(fname, "rb");
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42 if (in == NULL) {
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43 return CRYPT_FILE_NOTFOUND;
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44 }
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46 err = hash_filehandle(hash, in, out, outlen);
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47 if (fclose(in) != 0) {
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48 return CRYPT_ERROR;
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49 }
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51 return err;
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52 #endif
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53 }
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56 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_file.c,v $ */
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57 /* $Revision: 1.4 $ */
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58 /* $Date: 2006/03/31 14:15:35 $ */