Mercurial > dropbear

annotate libtomcrypt/src/mac/xcbc/xcbc_file.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 f849a5ca2efc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
382
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diff changeset
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 xcbc_file.c
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15 XCBC support, process a file, Tom St Denis
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16 */
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17
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18 #ifdef LTC_XCBC
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19
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20 /**
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21 XCBC a file
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22 @param cipher The index of the cipher desired
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23 @param key The secret key
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24 @param keylen The length of the secret key (octets)
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25 @param filename The name of the file you wish to XCBC
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26 @param out [out] Where the authentication tag is to be stored
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27 @param outlen [in/out] The max size and resulting size of the authentication tag
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28 @return CRYPT_OK if successful, CRYPT_NOP if file support has been disabled
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29 */
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30 int xcbc_file(int cipher,
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31 const unsigned char *key, unsigned long keylen,
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32 const char *filename,
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33 unsigned char *out, unsigned long *outlen)
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34 {
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35 #ifdef LTC_NO_FILE
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36 return CRYPT_NOP;
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37 #else
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38 int err, x;
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39 xcbc_state xcbc;
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40 FILE *in;
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41 unsigned char buf[512];
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42
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43 LTC_ARGCHK(key != NULL);
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44 LTC_ARGCHK(filename != NULL);
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45 LTC_ARGCHK(out != NULL);
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46 LTC_ARGCHK(outlen != NULL);
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47
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48 in = fopen(filename, "rb");
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49 if (in == NULL) {
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50 return CRYPT_FILE_NOTFOUND;
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51 }
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52
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53 if ((err = xcbc_init(&xcbc, cipher, key, keylen)) != CRYPT_OK) {
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54 fclose(in);
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55 return err;
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56 }
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57
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58 do {
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59 x = fread(buf, 1, sizeof(buf), in);
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60 if ((err = xcbc_process(&xcbc, buf, x)) != CRYPT_OK) {
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61 fclose(in);
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62 return err;
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63 }
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64 } while (x == sizeof(buf));
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65 fclose(in);
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66
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67 if ((err = xcbc_done(&xcbc, out, outlen)) != CRYPT_OK) {
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68 return err;
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69 }
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70
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71 #ifdef LTC_CLEAN_STACK
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72 zeromem(buf, sizeof(buf));
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73 #endif
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74
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75 return CRYPT_OK;
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76 #endif
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77 }
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78
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79 #endif
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80
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81 /* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_file.c,v $ */
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82 /* $Revision: 1.1 $ */
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83 /* $Date: 2006/11/03 01:56:41 $ */