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/* -*- Mode:C; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (C) 2004-2024 by the University of Southern California
* $Id: c23494984e1ae44af55668feda8232282c9473d0 $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifndef _SCRAMBLE_CRYPT_H
#define _SCRAMBLE_CRYPT_H
#ifdef __cplusplus
extern "C" {
#endif
#define ETHER_ADDR_LEN 6
#define ETHER_VLAN_LEN 2
#define _XOR16(a, b, i) (((uint16_t *)(a))[i] ^= ((uint16_t *)(b))[i])
#define _XOR32(a, b, i) (((uint32_t *)(a))[i] ^= ((uint32_t *)(b))[i])
#define SCRAMBLE_ETHER_ADDR(a) if (1) { \
_XOR32(a, scramble_ether_addr, 0); \
_XOR16(a, scramble_ether_addr, 2); \
}
#define SCRAMBLE_ETHER_VLAN(v) ((v) ^= scramble_ether_vlan);
#define SCRAMBLE_RANDOM_DEV "/dev/urandom"
typedef enum {
SCRAMBLE_NONE = 0x00,
SCRAMBLE_MD5 = 0x01,
SCRAMBLE_BLOWFISH = 0x02,
SCRAMBLE_AES = 0x03,
SCRAMBLE_SHA1 = 0x04
} scramble_crypt_t;
typedef struct {
scramble_crypt_t c4;
scramble_crypt_t c6;
u_char *key;
int klen;
u_char *pad;
int plen;
u_char *mac;
int mlen;
u_char *iv;
int ivlen;
} scramble_state_t;
/* external vars exported by mac scrambling macros */
extern uint8_t scramble_ether_addr[ETHER_ADDR_LEN];
extern uint16_t scramble_ether_vlan;
extern int scramble_mac; /* 0/1 */
/* public functions */
extern scramble_crypt_t scramble_crypto_ip4 (void);
extern scramble_crypt_t scramble_crypto_ip6 (void);
extern scramble_crypt_t scramble_name2type (const char *);
extern const char* scramble_type2name (scramble_crypt_t);
extern int scramble_newkey (u_char *, int);
extern int scramble_newpad (u_char *, int);
extern int scramble_newmac (u_char *, int);
extern int scramble_readstate (const char *, scramble_state_t *);
extern int scramble_savestate (const char *, const scramble_state_t *);
extern int scramble_init (const scramble_state_t *s);
extern int scramble_init_from_file (const char *, scramble_crypt_t, scramble_crypt_t, int *);
extern void scramble_cleanup ();
extern uint32_t scramble_ip4 (uint32_t, int);
extern uint32_t unscramble_ip4 (uint32_t, int);
extern void scramble_ip6 (struct in6_addr *, int);
extern void unscramble_ip6 (struct in6_addr *, int);
#ifdef __cplusplus
}
#endif
#endif /* _SCRAMBLE_CRYPT_H */
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