Mercurial > dropbear

annotate libtomcrypt/src/mac/omac/omac_memory.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
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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
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13 /**
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14 @file omac_memory.c
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15 OMAC1 support, process a block of memory, Tom St Denis
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16 */
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17
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18 #ifdef LTC_OMAC
285
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19
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20 /**
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21 OMAC a block of memory
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22 @param cipher The index of the desired cipher
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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 in The data to send through OMAC
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26 @param inlen The length of the data to send through OMAC (octets)
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27 @param out [out] The destination of the authentication tag
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28 @param outlen [in/out] The max size and resulting size of the authentication tag (octets)
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29 @return CRYPT_OK if successful
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30 */
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31 int omac_memory(int cipher,
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32 const unsigned char *key, unsigned long keylen,
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33 const unsigned char *in, unsigned long inlen,
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34 unsigned char *out, unsigned long *outlen)
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35 {
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36 int err;
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37 omac_state *omac;
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38
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39 LTC_ARGCHK(key != NULL);
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40 LTC_ARGCHK(in != NULL);
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41 LTC_ARGCHK(out != NULL);
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42 LTC_ARGCHK(outlen != NULL);
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43
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44 /* is the cipher valid? */
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45 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
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46 return err;
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47 }
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48
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49 /* Use accelerator if found */
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50 if (cipher_descriptor[cipher].omac_memory != NULL) {
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51 return cipher_descriptor[cipher].omac_memory(key, keylen, in, inlen, out, outlen);
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52 }
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53
285
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54 /* allocate ram for omac state */
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55 omac = XMALLOC(sizeof(omac_state));
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56 if (omac == NULL) {
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57 return CRYPT_MEM;
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58 }
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59
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60 /* omac process the message */
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61 if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) {
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62 goto LBL_ERR;
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63 }
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64 if ((err = omac_process(omac, in, inlen)) != CRYPT_OK) {
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65 goto LBL_ERR;
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66 }
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67 if ((err = omac_done(omac, out, outlen)) != CRYPT_OK) {
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68 goto LBL_ERR;
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69 }
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70
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71 err = CRYPT_OK;
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72 LBL_ERR:
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73 #ifdef LTC_CLEAN_STACK
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74 zeromem(omac, sizeof(omac_state));
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75 #endif
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76
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77 XFREE(omac);
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78 return err;
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79 }
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80
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81 #endif
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82
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83 /* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_memory.c,v $ */
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84 /* $Revision: 1.6 $ */
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85 /* $Date: 2006/11/08 23:01:06 $ */