1 /*
2   chronyd/chronyc - Programs for keeping computer clocks accurate.
3 
4  **********************************************************************
5  * Copyright (C) Miroslav Lichvar  2020
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of version 2 of the GNU General Public License as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with this program; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
19  *
20  **********************************************************************
21 
22   =======================================================================
23 
24   Header for NTS Authenticator and Encrypted Extension Fields
25   extension field
26   */
27 
28 #ifndef GOT_NTS_NTP_AUTH_H
29 #define GOT_NTS_NTP_AUTH_H
30 
31 #include "ntp.h"
32 #include "siv.h"
33 
34 extern int NNA_GenerateAuthEF(NTP_Packet *packet, NTP_PacketInfo *info, SIV_Instance siv,
35                               const unsigned char *nonce, int nonce_length,
36                               const unsigned char *plaintext, int plaintext_length,
37                               int min_ef_length);
38 
39 extern int NNA_DecryptAuthEF(NTP_Packet *packet, NTP_PacketInfo *info, SIV_Instance siv,
40                              int ef_start, unsigned char *plaintext, int buffer_length,
41                              int *plaintext_length);
42 
43 #endif
44