Mercurial > dropbear

annotate libtomcrypt/src/mac/xcbc/xcbc_process.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_process.c
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15 XCBC Support, process blocks with XCBC
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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 /** Process data through XCBC-MAC
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21 @param xcbc The XCBC-MAC state
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22 @param in Input data to process
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23 @param inlen Length of input in octets
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24 Return CRYPT_OK on success
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25 */
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26 int xcbc_process(xcbc_state *xcbc, const unsigned char *in, unsigned long inlen)
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27 {
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28 int err;
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29 #ifdef LTC_FAST
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30 int x;
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31 #endif
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32
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33 LTC_ARGCHK(xcbc != NULL);
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34 LTC_ARGCHK(in != NULL);
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35
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36 /* check structure */
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37 if ((err = cipher_is_valid(xcbc->cipher)) != CRYPT_OK) {
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38 return err;
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39 }
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40
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41 if ((xcbc->blocksize > cipher_descriptor[xcbc->cipher].block_length) || (xcbc->blocksize < 0) ||
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42 (xcbc->buflen > xcbc->blocksize) || (xcbc->buflen < 0)) {
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43 return CRYPT_INVALID_ARG;
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44 }
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45
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46 #ifdef LTC_FAST
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47 if (xcbc->buflen == 0) {
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48 while (inlen > (unsigned long)xcbc->blocksize) {
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49 for (x = 0; x < xcbc->blocksize; x += sizeof(LTC_FAST_TYPE)) {
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50 *((LTC_FAST_TYPE*)&(xcbc->IV[x])) ^= *((LTC_FAST_TYPE*)&(in[x]));
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51 }
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52 cipher_descriptor[xcbc->cipher].ecb_encrypt(xcbc->IV, xcbc->IV, &xcbc->key);
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53 in += xcbc->blocksize;
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54 inlen -= xcbc->blocksize;
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55 }
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56 }
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57 #endif
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58
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59 while (inlen) {
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60 if (xcbc->buflen == xcbc->blocksize) {
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61 cipher_descriptor[xcbc->cipher].ecb_encrypt(xcbc->IV, xcbc->IV, &xcbc->key);
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62 xcbc->buflen = 0;
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63 }
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64 xcbc->IV[xcbc->buflen++] ^= *in++;
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65 --inlen;
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66 }
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67 return CRYPT_OK;
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68 }
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69
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70 #endif
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71
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72 /* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_process.c,v $ */
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73 /* $Revision: 1.9 $ */
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74 /* $Date: 2006/11/09 22:43:52 $ */
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75