1 /*
2 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 #pragma ident "%Z%%M% %I% %E% SMI"
7
8 /*
9 * Miscellaneous routines needed by the telnet client for authentication
10 * and / or encryption.
11 */
12
13 /*
14 * Copyright (c) 1991, 1993
15 * The Regents of the University of California. All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 * 3. All advertising materials mentioning features or use of this software
26 * must display the following acknowledgement:
27 * This product includes software developed by the University of
28 * California, Berkeley and its contributors.
29 * 4. Neither the name of the University nor the names of its contributors
30 * may be used to endorse or promote products derived from this software
31 * without specific prior written permission.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * SUCH DAMAGE.
44 */
45
46 #ifndef lint
47 static char sccsid[] = "@(#)authenc.c 8.1 (Berkeley) 6/6/93";
48 #endif /* not lint */
49
50 #include <sys/types.h>
51 #include <arpa/telnet.h>
52
53 #include "general.h"
54 #include "ring.h"
55 #include "externs.h"
56 #include "defines.h"
57 #include "types.h"
58
59 char *RemoteHostName = NULL;
60 char *UserNameRequested = NULL;
61
62 #define MAXNETDATA 16
63
64 /*
65 * Get ready to do authentication and encryption by calling their
66 * init routines, and clearing the user name variable
67 */
68 /* ARGSUSED */
69 void
auth_encrypt_init(char * local,char * remote,char * name)70 auth_encrypt_init(char *local, char *remote, char *name)
71 {
72 RemoteHostName = remote;
73
74 auth_init(name);
75
76 encrypt_init(name);
77
78 if (UserNameRequested) {
79 free(UserNameRequested);
80 UserNameRequested = NULL;
81 }
82 }
83
84 /*
85 * Set the user name variable. This is the user name used from now
86 * on for authentication and encryption
87 */
88 void
auth_encrypt_user(char * name)89 auth_encrypt_user(char *name)
90 {
91 if (UserNameRequested)
92 free(UserNameRequested);
93 UserNameRequested = name ? strdup(name) : NULL;
94 }
95
96 int
net_write(unsigned char * str,int len)97 net_write(unsigned char *str, int len)
98 {
99 if (NETROOM() > len) {
100 ring_supply_data(&netoring, str, len);
101 if (str[0] == IAC && str[1] == SE)
102 printsub('>', &str[2], len - 2);
103 return (len);
104 }
105 return (0);
106 }
107
108 void
net_encrypt(void)109 net_encrypt(void)
110 {
111 if (encrypt_output)
112 ring_encrypt(&netoring, encrypt_output);
113 else
114 ring_clearto(&netoring);
115 }
116
117 /*
118 * Spin to wait for authentication to complete
119 * This allows for a timeout
120 */
121 void
telnet_spin(void)122 telnet_spin(void)
123 {
124 extern boolean_t scheduler_lockout_tty;
125
126 scheduler_lockout_tty = B_TRUE;
127 (void) Scheduler(0);
128 scheduler_lockout_tty = B_FALSE;
129 }
130
131
132 /*
133 * Used to print out unsigned chars as decimals for debugging options
134 */
135 void
printd(unsigned char * data,int cnt)136 printd(unsigned char *data, int cnt)
137 {
138 cnt = (cnt < MAXNETDATA) ? cnt:MAXNETDATA;
139 while (cnt-- > 0)
140 (void) printf(" %02x", *data++);
141 }
142