Mercurial > dropbear

annotate libtomcrypt/src/hashes/helper/hash_file.c @ 994:5c5ade336926

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Prefer stronger algorithms in algorithm negotiation. Prefer diffie-hellman-group14-sha1 (2048 bit) over diffie-hellman-group1-sha1 (1024 bit). Due to meet-in-the-middle attacks the effective key length of three key 3DES is 112 bits. AES is stronger and faster then 3DES. Prefer to delay the start of compression until after authentication has completed. This avoids exposing compression code to attacks from unauthenticated users. (github pull request #9)
author Fedor Brunner <fedor.brunner@azet.sk>
date Fri, 23 Jan 2015 23:00:25 +0800
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_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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28 return CRYPT_NOP;
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29 #else
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30 FILE *in;
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31 int err;
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32 LTC_ARGCHK(fname != NULL);
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33 LTC_ARGCHK(out != NULL);
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34 LTC_ARGCHK(outlen != NULL);
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36 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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37 return err;
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38 }
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40 in = fopen(fname, "rb");
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41 if (in == NULL) {
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42 return CRYPT_FILE_NOTFOUND;
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43 }
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45 err = hash_filehandle(hash, in, out, outlen);
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46 if (fclose(in) != 0) {
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47 return CRYPT_ERROR;
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48 }
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50 return err;
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51 #endif
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52 }
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55 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_file.c,v $ */
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56 /* $Revision: 1.4 $ */
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57 /* $Date: 2006/03/31 14:15:35 $ */