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