Mercurial > dropbear

annotate libtomcrypt/src/hashes/helper/hash_filehandle.c @ 447:278805938dcf

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Patch from Nicolai Ehemann to try binding before going to the background, so that if it exits early (because something's already listening etc) then it will return an exitcode of 1.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 19 Jul 2007 15:54:18 +0000
parents 0cbe8f6dbf9e
children eef377591301
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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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12
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13 /**
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14 @file hash_filehandle.c
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15 Hash open files, Tom St Denis
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16 */
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17
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18 /**
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19 Hash data from an open file handle.
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20 @param hash The index of the hash you want to use
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21 @param in The FILE* handle of the file you want to hash
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22 @param out [out] The destination of the digest
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23 @param outlen [in/out] The max size and resulting size of the digest
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24 @result CRYPT_OK if successful
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25 */
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26 int hash_filehandle(int hash, FILE *in, unsigned char *out, unsigned long *outlen)
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27 {
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28 #ifdef LTC_NO_FILE
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29 return CRYPT_NOP;
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30 #else
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31 hash_state md;
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32 unsigned char buf[512];
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33 size_t x;
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34 int err;
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35
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36 LTC_ARGCHK(out != NULL);
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37 LTC_ARGCHK(outlen != NULL);
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38 LTC_ARGCHK(in != NULL);
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39
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40 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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41 return err;
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42 }
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43
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44 if (*outlen < hash_descriptor[hash].hashsize) {
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45 *outlen = hash_descriptor[hash].hashsize;
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46 return CRYPT_BUFFER_OVERFLOW;
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47 }
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48 if ((err = hash_descriptor[hash].init(&md)) != CRYPT_OK) {
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49 return err;
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50 }
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51
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52 *outlen = hash_descriptor[hash].hashsize;
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53 do {
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54 x = fread(buf, 1, sizeof(buf), in);
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55 if ((err = hash_descriptor[hash].process(&md, buf, x)) != CRYPT_OK) {
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56 return err;
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57 }
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58 } while (x == sizeof(buf));
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59 err = hash_descriptor[hash].done(&md, out);
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61 #ifdef LTC_CLEAN_STACK
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62 zeromem(buf, sizeof(buf));
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63 #endif
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64 return err;
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65 #endif
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66 }
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68
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69 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_filehandle.c,v $ */
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70 /* $Revision: 1.5 $ */
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71 /* $Date: 2006/06/16 21:53:41 $ */