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comparison src/encauth/eax/eax_encrypt.c @ 191:1c15b283127b libtomcrypt-orig

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Import of libtomcrypt 1.02 with manual path rename rearrangement etc
author Matt Johnston <matt@ucc.asn.au>
date Fri, 06 May 2005 13:23:02 +0000
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children 39d5d58461d6
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143:5d99163f7e32 191:1c15b283127b
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, [email protected], http://libtomcrypt.org
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 */
28 int 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