Mercurial > dropbear

annotate libtomcrypt/src/hashes/helper/hash_memory_multi.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
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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 *
382
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9 * Tom St Denis, [email protected], http://libtomcrypt.com
285
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10 */
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11 #include "tomcrypt.h"
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12 #include <stdarg.h>
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13 /**
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14 @file hash_memory_multi.c
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15 Hash (multiple buffers) memory helper, Tom St Denis
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16 */
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17
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18 /**
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19 Hash multiple (non-adjacent) blocks of memory at once.
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20 @param hash The index of the hash you wish to use
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21 @param out [out] Where to store the digest
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22 @param outlen [in/out] Max size and resulting size of the digest
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23 @param in The data you wish to hash
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24 @param inlen The length of the data to hash (octets)
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25 @param ... tuples of (data,len) pairs to hash, terminated with a (NULL,x) (x=don't care)
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26 @return CRYPT_OK if successful
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27 */
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28 int hash_memory_multi(int hash, unsigned char *out, unsigned long *outlen,
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29 const unsigned char *in, unsigned long inlen, ...)
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30 {
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31 hash_state *md;
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32 int err;
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33 va_list args;
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34 const unsigned char *curptr;
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35 unsigned long curlen;
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36
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37 LTC_ARGCHK(in != NULL);
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38 LTC_ARGCHK(out != NULL);
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39 LTC_ARGCHK(outlen != NULL);
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40
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41 if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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42 return err;
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43 }
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44
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45 if (*outlen < hash_descriptor[hash].hashsize) {
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46 *outlen = hash_descriptor[hash].hashsize;
285
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47 return CRYPT_BUFFER_OVERFLOW;
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48 }
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49
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50 md = XMALLOC(sizeof(hash_state));
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51 if (md == NULL) {
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52 return CRYPT_MEM;
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53 }
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54
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55 if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) {
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56 goto LBL_ERR;
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57 }
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58
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59 va_start(args, inlen);
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60 curptr = in;
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61 curlen = inlen;
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62 for (;;) {
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63 /* process buf */
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64 if ((err = hash_descriptor[hash].process(md, curptr, curlen)) != CRYPT_OK) {
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65 goto LBL_ERR;
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66 }
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67 /* step to next */
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68 curptr = va_arg(args, const unsigned char*);
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69 if (curptr == NULL) {
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70 break;
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71 }
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72 curlen = va_arg(args, unsigned long);
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73 }
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74 err = hash_descriptor[hash].done(md, out);
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75 *outlen = hash_descriptor[hash].hashsize;
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76 LBL_ERR:
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77 #ifdef LTC_CLEAN_STACK
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78 zeromem(md, sizeof(hash_state));
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79 #endif
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80 XFREE(md);
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81 va_end(args);
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82 return err;
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83 }
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84
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85 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/helper/hash_memory_multi.c,v $ */
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86 /* $Revision: 1.5 $ */
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87 /* $Date: 2006/06/16 21:53:41 $ */