Annotation of embedaddon/sudo/plugins/sudoers/auth/sia.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 1999-2005, 2007, 2010-2011
3: * Todd C. Miller <Todd.Miller@courtesan.com>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
17: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
18: *
19: * Sponsored in part by the Defense Advanced Research Projects
20: * Agency (DARPA) and Air Force Research Laboratory, Air Force
21: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
22: */
23:
24: #include <config.h>
25:
26: #include <sys/types.h>
27: #include <sys/param.h>
28: #include <stdio.h>
29: #ifdef STDC_HEADERS
30: # include <stdlib.h>
31: # include <stddef.h>
32: #else
33: # ifdef HAVE_STDLIB_H
34: # include <stdlib.h>
35: # endif
36: #endif /* STDC_HEADERS */
37: #ifdef HAVE_STRING_H
38: # include <string.h>
39: #endif /* HAVE_STRING_H */
40: #ifdef HAVE_STRINGS_H
41: # include <strings.h>
42: #endif /* HAVE_STRINGS_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 "sudoers.h"
50: #include "sudo_auth.h"
51:
52: static int sudo_collect(int, int, uchar_t *, int, prompt_t *);
53:
54: static char *def_prompt;
55: static char **sudo_argv;
56: static int sudo_argc;
57:
58: /*
59: * Collection routine (callback) for limiting the timeouts in SIA
60: * prompts and (possibly) setting a custom prompt.
61: */
62: static int
63: sudo_collect(int timeout, int rendition, uchar_t *title, int nprompts,
64: prompt_t *prompts)
65: {
66: switch (rendition) {
67: case SIAFORM:
68: case SIAONELINER:
69: if (timeout <= 0 || timeout > def_passwd_timeout * 60)
70: timeout = def_passwd_timeout * 60;
71: /*
72: * Substitute custom prompt if a) the sudo prompt is not "Password:"
73: * and b) the SIA prompt is "Password:" (so we know it is safe).
74: * This keeps us from overwriting things like S/Key challenges.
75: */
76: if (strcmp((char *)prompts[0].prompt, "Password:") == 0 &&
77: strcmp(def_prompt, "Password:") != 0)
78: prompts[0].prompt = (unsigned char *)def_prompt;
79: break;
80: default:
81: break;
82: }
83:
84: return sia_collect_trm(timeout, rendition, title, nprompts, prompts);
85: }
86:
87: int
88: sia_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
89: {
90: SIAENTITY *siah = NULL;
91: int i;
92: extern int NewArgc;
93: extern char **NewArgv;
94:
95: /* Rebuild argv for sia_ses_init() */
96: sudo_argc = NewArgc + 1;
97: sudo_argv = emalloc2(sudo_argc + 1, sizeof(char *));
98: sudo_argv[0] = "sudo";
99: for (i = 0; i < NewArgc; i++)
100: sudo_argv[i + 1] = NewArgv[i];
101: sudo_argv[sudo_argc] = NULL;
102:
103: if (sia_ses_init(&siah, sudo_argc, sudo_argv, NULL, pw->pw_name, user_ttypath, 1, NULL) != SIASUCCESS) {
104:
105: log_error(USE_ERRNO|NO_EXIT|NO_MAIL,
106: _("unable to initialize SIA session"));
107: return AUTH_FATAL;
108: }
109:
110: auth->data = (void *) siah;
111: return AUTH_SUCCESS;
112: }
113:
114: int
115: sia_verify(struct passwd *pw, char *prompt, sudo_auth *auth)
116: {
117: SIAENTITY *siah = (SIAENTITY *) auth->data;
118:
119: def_prompt = prompt; /* for sudo_collect */
120:
121: /* XXX - need a way to detect user hitting return or EOF at prompt */
122: if (sia_ses_reauthent(sudo_collect, siah) == SIASUCCESS)
123: return AUTH_SUCCESS;
124: else
125: return AUTH_FAILURE;
126: }
127:
128: int
129: sia_cleanup(struct passwd *pw, sudo_auth *auth)
130: {
131: SIAENTITY *siah = (SIAENTITY *) auth->data;
132:
133: (void) sia_ses_release(&siah);
134: efree(sudo_argv);
135: return AUTH_SUCCESS;
136: }
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