annotate eax_encrypt.c @ 15:6362d3854bb4 libtomcrypt-orig

0.96 release of LibTomCrypt
author Matt Johnston <matt@ucc.asn.au>
date Tue, 15 Jun 2004 14:07:21 +0000
parents 7faae8f46238
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2 *
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 * LibTomCrypt is a library that provides various cryptographic
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 * algorithms in a highly modular and flexible manner.
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 *
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 * The library is free for all purposes without any express
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 * guarantee it works.
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
8 *
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9 * Tom St Denis, [email protected], http://libtomcrypt.org
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10 */
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12 /* EAX Implementation by Tom St Denis */
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 #include "mycrypt.h"
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 #ifdef EAX_MODE
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17 int eax_encrypt(eax_state *eax, const unsigned char *pt, unsigned char *ct, unsigned long length)
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18 {
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19 int err;
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 _ARGCHK(eax != NULL);
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 _ARGCHK(pt != NULL);
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23 _ARGCHK(ct != NULL);
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25 /* encrypt */
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 if ((err = ctr_encrypt(pt, ct, length, &eax->ctr)) != CRYPT_OK) {
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 return err;
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 }
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 /* omac ciphertext */
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 return omac_process(&eax->ctomac, ct, length);
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
32 }
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
33
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
34 #endif
7faae8f46238 Branch renaming
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
35