Mercurial > dropbear

annotate libtomcrypt/src/mac/pmac/pmac_memory.c @ 1053:fd3712d1ff7f

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Better failure handling
author Matt Johnston <matt@ucc.asn.au>
date Sat, 28 Feb 2015 23:49:39 +0800
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 *
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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 pmac_memory.c
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15 PMAC implementation, process a block of memory, by Tom St Denis
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16 */
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17
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18 #ifdef LTC_PMAC
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20 /**
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21 PMAC a block of memory
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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 in The data you wish to send through PMAC
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26 @param inlen The length of data you wish to send through PMAC (octets)
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27 @param out [out] Destination for the authentication tag
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28 @param outlen [in/out] The max size and resulting size of the authentication tag
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29 @return CRYPT_OK if successful
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30 */
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31 int pmac_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 pmac_state *pmac;
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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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44 /* allocate ram for pmac state */
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45 pmac = XMALLOC(sizeof(pmac_state));
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46 if (pmac == NULL) {
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47 return CRYPT_MEM;
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48 }
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49
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50 if ((err = pmac_init(pmac, cipher, key, keylen)) != CRYPT_OK) {
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51 goto LBL_ERR;
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52 }
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53 if ((err = pmac_process(pmac, in, inlen)) != CRYPT_OK) {
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54 goto LBL_ERR;
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55 }
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56 if ((err = pmac_done(pmac, out, outlen)) != CRYPT_OK) {
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57 goto LBL_ERR;
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58 }
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59
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60 err = CRYPT_OK;
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61 LBL_ERR:
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62 #ifdef LTC_CLEAN_STACK
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63 zeromem(pmac, sizeof(pmac_state));
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64 #endif
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65
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66 XFREE(pmac);
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67 return err;
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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/pmac/pmac_memory.c,v $ */
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73 /* $Revision: 1.5 $ */
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74 /* $Date: 2006/11/03 00:39:49 $ */