1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* Rest in pieces - RIP protocol
*
* Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#define LOCAL_DEBUG
#include <string.h>
#include <stdlib.h>
#include "nest/bird.h"
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "lib/socket.h"
#include "lib/resource.h"
#include "lib/lists.h"
#include "lib/timer.h"
#include "lib/md5.h"
#include "rip.h"
#define P ((struct rip_proto *) p)
#define P_CF ((struct rip_proto_config *)p->cf)
/* 1 == failed, 0 == ok */
int
rip_incoming_authentication( struct proto *p, struct rip_block_auth *block, struct rip_packet *packet, int num )
{
DBG( "Incoming authentication: " );
switch (block->authtype) { /* Authentication type */
case AT_PLAINTEXT:
DBG( "Plaintext passwd" );
if (!P_CF->passwords) {
log( L_AUTH "no passwords set and password authentication came\n" );
return 1;
}
if (strncmp( (char *) (&block->packetlen), P_CF->passwords->password, 16)) {
log( L_AUTH, "Passwd authentication failed!\n" );
return 1;
}
return 0;
case AT_MD5:
DBG( "md5 password" );
{
struct password_item *head;
struct rip_md5_tail *tail;
tail = (char *) packet + (block->packetlen - sizeof(struct rip_block_auth));
head = P_CF->passwords;
while (head) {
if (head->id == block->keyid) {
struct MD5Context ctxt;
int i;
char md5sum_packet[16];
char md5sum_computed[16];
memcpy(md5sum_packet, tail->md5, i);
password_strncpy(tail->md5, head->password, 16);
MD5Init(&ctxt);
MD5Update(&ctxt, packet, block->packetlen );
MD5Final(md5sum_computed, &ctxt);
if (memcmp(md5sum_packet, md5sum_computed, 16))
return 1;
}
head = head->next;
}
return 1;
}
}
return 0;
}
void
rip_outgoing_authentication( struct proto *p, struct rip_block_auth *block, struct rip_packet *packet, int num )
{
DBG( "Outgoing authentication: " );
block->authtype = P_CF->authtype;
switch (P_CF->authtype) {
case AT_PLAINTEXT:
if (!P_CF->passwords) {
log( L_ERR "no passwords set and password authentication requested\n" );
return;
}
password_strncpy( (char *) (&block->packetlen), P_CF->passwords->password, 16);
return;
}
}
|
