2 * Encryption and decryption routines implementing the EAX' encryption mode
3 * Copyright 2010, Edward J. Beroset, edward.j.beroset@us.elster.com
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 typedef struct tagMAC_T
33 #define EAX_MODE_CLEARTEXT_AUTH 1
34 #define EAX_MODE_CIPHERTEXT_AUTH 2
36 #define EAX_SIZEOF_KEY 16
39 Decrypts cleartext data using EAX' mode (see ANSI Standard C12.22-2008).
41 @param[in] pN pointer to cleartext (canonified form)
42 @param[in] pK pointer to secret key
43 @param[in,out] pC pointer to ciphertext
44 @param[in] SizeN byte length of cleartext (pN) buffer
45 @param[in] SizeK byte length of secret key (pK)
46 @param[in] SizeC byte length of ciphertext (pC) buffer
47 @param[in] pMac four-byte Message Authentication Code
48 @param[in] Mode EAX_MODE_CLEARTEXT_AUTH or EAX_MODE_CIPHERTEXT_AUTH
49 @return TRUE if message has been authenticated; FALSE if not
50 authenticated, invalid Mode or error
52 gboolean Eax_Decrypt(guint8 *pN, guint8 *pK, guint8 *pC,
53 guint32 SizeN, guint32 SizeK, guint32 SizeC, MAC_T *pMac,