1 /*
2 * Copyright (c) 1999-2001, 2003 Todd C. Miller <Todd.Miller@courtesan.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
16 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
17 *
18 * Sponsored in part by the Defense Advanced Research Projects
19 * Agency (DARPA) and Air Force Research Laboratory, Air Force
20 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
21 */
22
23 #include "config.h"
24
25 #include <sys/types.h>
26 #include <sys/param.h>
27 #include <stdio.h>
28 #ifdef STDC_HEADERS
29 # include <stdlib.h>
30 # include <stddef.h>
31 #else
32 # ifdef HAVE_STDLIB_H
33 # include <stdlib.h>
34 # endif
35 #endif /* STDC_HEADERS */
36 #ifdef HAVE_STRING_H
37 # include <string.h>
38 #else
39 # ifdef HAVE_STRINGS_H
40 # include <strings.h>
41 # endif
42 #endif /* HAVE_STRING_H */
43 #ifdef HAVE_UNISTD_H
44 # include <unistd.h>
45 #endif /* HAVE_UNISTD_H */
46 #include <pwd.h>
47 #include <siad.h>
48
49 #include "sudo.h"
50 #include "sudo_auth.h"
51
52 #ifndef lint
53 static const char rcsid[] = "$Sudo: sia.c,v 1.14 2004/02/13 21:36:47 millert Exp $";
54 #endif /* lint */
55
56 static int sudo_collect __P((int, int, uchar_t *, int, prompt_t *));
57
58 static char *def_prompt;
59
60 /*
61 * Collection routine (callback) for limiting the timeouts in SIA
62 * prompts and (possibly) setting a custom prompt.
63 */
64 static int
sudo_collect(timeout,rendition,title,nprompts,prompts)65 sudo_collect(timeout, rendition, title, nprompts, prompts)
66 int timeout;
67 int rendition;
68 uchar_t *title;
69 int nprompts;
70 prompt_t *prompts;
71 {
72 switch (rendition) {
73 case SIAFORM:
74 case SIAONELINER:
75 if (timeout <= 0 || timeout > def_passwd_timeout * 60)
76 timeout = def_passwd_timeout * 60;
77 /*
78 * Substitute custom prompt if a) the sudo prompt is not "Password:"
79 * and b) the SIA prompt is "Password:" (so we know it is safe).
80 * This keeps us from overwriting things like S/Key challenges.
81 */
82 if (strcmp((char *)prompts[0].prompt, "Password:") == 0 &&
83 strcmp(def_prompt, "Password:") != 0)
84 prompts[0].prompt = (unsigned char *)def_prompt;
85 break;
86 default:
87 break;
88 }
89
90 return sia_collect_trm(timeout, rendition, title, nprompts, prompts);
91 }
92
93 int
sia_setup(pw,promptp,auth)94 sia_setup(pw, promptp, auth)
95 struct passwd *pw;
96 char **promptp;
97 sudo_auth *auth;
98 {
99 SIAENTITY *siah = NULL;
100 extern int Argc;
101 extern char **Argv;
102
103 if (sia_ses_init(&siah, Argc, Argv, NULL, pw->pw_name, ttyname(0), 1, NULL)
104 != SIASUCCESS) {
105
106 log_error(USE_ERRNO|NO_EXIT|NO_MAIL,
107 "unable to initialize SIA session");
108 return(AUTH_FATAL);
109 }
110
111 auth->data = (VOID *) siah;
112 return(AUTH_SUCCESS);
113 }
114
115 int
sia_verify(pw,prompt,auth)116 sia_verify(pw, prompt, auth)
117 struct passwd *pw;
118 char *prompt;
119 sudo_auth *auth;
120 {
121 SIAENTITY *siah = (SIAENTITY *) auth->data;
122
123 def_prompt = prompt; /* for sudo_collect */
124
125 /* XXX - need a way to detect user hitting return or EOF at prompt */
126 if (sia_ses_reauthent(sudo_collect, siah) == SIASUCCESS)
127 return(AUTH_SUCCESS);
128 else
129 return(AUTH_FAILURE);
130 }
131
132 int
sia_cleanup(pw,auth)133 sia_cleanup(pw, auth)
134 struct passwd *pw;
135 sudo_auth *auth;
136 {
137 SIAENTITY *siah = (SIAENTITY *) auth->data;
138
139 (void) sia_ses_release(&siah);
140 return(AUTH_SUCCESS);
141 }
142