Mercurial > dropbear

annotate libtomcrypt/src/mac/xcbc/xcbc_memory.c @ 618:b5cc8878d5ec

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Properly fix the bug found years ago by Klocwork, refound again.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 07 Apr 2011 13:33:26 +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, XCBC-MAC a block of memory
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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 /** XCBC-MAC a block of memory
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21 @param cipher Index of cipher to use
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22 @param key [in] Secret key
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23 @param keylen Length of key in octets
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24 @param in [in] Message to MAC
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25 @param inlen Length of input in octets
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26 @param out [out] Destination for the MAC tag
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27 @param outlen [in/out] Output size and final tag size
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28 Return CRYPT_OK on success.
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29 */
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30 int xcbc_memory(int cipher,
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31 const unsigned char *key, unsigned long keylen,
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32 const unsigned char *in, unsigned long inlen,
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33 unsigned char *out, unsigned long *outlen)
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34 {
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35 xcbc_state *xcbc;
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36 int err;
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37
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38 /* is the cipher valid? */
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39 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
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40 return err;
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41 }
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42
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43 /* Use accelerator if found */
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44 if (cipher_descriptor[cipher].xcbc_memory != NULL) {
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45 return cipher_descriptor[cipher].xcbc_memory(key, keylen, in, inlen, out, outlen);
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46 }
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47
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48 xcbc = XCALLOC(1, sizeof(*xcbc));
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49 if (xcbc == NULL) {
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50 return CRYPT_MEM;
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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 goto done;
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55 }
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56
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57 if ((err = xcbc_process(xcbc, in, inlen)) != CRYPT_OK) {
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58 goto done;
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59 }
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60
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61 err = xcbc_done(xcbc, out, outlen);
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62 done:
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63 XFREE(xcbc);
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64 return err;
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65 }
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66
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67 #endif
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68
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69 /* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_memory.c,v $ */
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70 /* $Revision: 1.4 $ */
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71 /* $Date: 2006/11/21 23:02:42 $ */