1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
10 */
11 /**
12 @file eax_addheader.c
13 EAX implementation, add meta-data, by Tom St Denis
14 */
15 #include "tomcrypt.h"
16
17 #ifdef EAX_MODE
18
19 /**
20 add header (metadata) to the stream
21 @param eax The current EAX state
22 @param header The header (meta-data) data you wish to add to the state
23 @param length The length of the header data
24 @return CRYPT_OK if successful
25 */
eax_addheader(eax_state * eax,const unsigned char * header,unsigned long length)26 int eax_addheader(eax_state *eax, const unsigned char *header,
27 unsigned long length)
28 {
29 LTC_ARGCHK(eax != NULL);
30 LTC_ARGCHK(header != NULL);
31 return omac_process(&eax->headeromac, header, length);
32 }
33
34 #endif
35
36 /* $Source: /cvs/libtom/libtomcrypt/src/encauth/eax/eax_addheader.c,v $ */
37 /* $Revision: 1.4 $ */
38 /* $Date: 2006/03/31 14:15:35 $ */
39