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/**
13   @file eax_encrypt.c
14   EAX implementation, encrypt block by Tom St Denis
15*/
16#include "tomcrypt.h"
17
18#ifdef EAX_MODE
19
20/**
21   Encrypt with EAX a block of data.
22   @param eax        The EAX state
23   @param pt         The plaintext to encrypt
24   @param ct         [out] The ciphertext as encrypted
25   @param length     The length of the plaintext (octets)
26   @return CRYPT_OK if successful
27*/
28int eax_encrypt(eax_state *eax, const unsigned char *pt, unsigned char *ct,
29                unsigned long length)
30{
31   int err;
32
33   LTC_ARGCHK(eax != NULL);
34   LTC_ARGCHK(pt  != NULL);
35   LTC_ARGCHK(ct  != NULL);
36
37   /* encrypt */
38   if ((err = ctr_encrypt(pt, ct, length, &eax->ctr)) != CRYPT_OK) {
39      return err;
40   }
41
42   /* omac ciphertext */
43   return omac_process(&eax->ctomac, ct, length);
44}
45
46#endif
47
48
49/* $Source: /cvs/libtom/libtomcrypt/src/encauth/eax/eax_encrypt.c,v $ */
50/* $Revision: 1.4 $ */
51/* $Date: 2006/03/31 14:15:35 $ */
52