Annotation of embedaddon/sudo/plugins/sudoers/auth/sia.c, revision 1.1.1.3
1.1 misho 1: /*
1.1.1.3 ! misho 2: * Copyright (c) 1999-2005, 2007, 2010-2013
1.1 misho 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 <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: #endif /* HAVE_STRING_H */
39: #ifdef HAVE_STRINGS_H
40: # include <strings.h>
41: #endif /* HAVE_STRINGS_H */
42: #ifdef HAVE_UNISTD_H
43: # include <unistd.h>
44: #endif /* HAVE_UNISTD_H */
45: #include <pwd.h>
46: #include <siad.h>
47:
48: #include "sudoers.h"
49: #include "sudo_auth.h"
50:
51: static int sudo_collect(int, int, uchar_t *, int, prompt_t *);
52:
53: static char *def_prompt;
54: static char **sudo_argv;
55: static int sudo_argc;
56:
57: /*
58: * Collection routine (callback) for limiting the timeouts in SIA
59: * prompts and (possibly) setting a custom prompt.
60: */
61: static int
62: sudo_collect(int timeout, int rendition, uchar_t *title, int nprompts,
63: prompt_t *prompts)
64: {
1.1.1.2 misho 65: debug_decl(sudo_collect, SUDO_DEBUG_AUTH)
66:
1.1 misho 67: switch (rendition) {
68: case SIAFORM:
69: case SIAONELINER:
70: if (timeout <= 0 || timeout > def_passwd_timeout * 60)
71: timeout = def_passwd_timeout * 60;
72: /*
73: * Substitute custom prompt if a) the sudo prompt is not "Password:"
74: * and b) the SIA prompt is "Password:" (so we know it is safe).
75: * This keeps us from overwriting things like S/Key challenges.
76: */
77: if (strcmp((char *)prompts[0].prompt, "Password:") == 0 &&
78: strcmp(def_prompt, "Password:") != 0)
79: prompts[0].prompt = (unsigned char *)def_prompt;
80: break;
81: default:
82: break;
83: }
84:
1.1.1.2 misho 85: debug_return_int(sia_collect_trm(timeout, rendition, title, nprompts, prompts));
1.1 misho 86: }
87:
88: int
1.1.1.2 misho 89: sudo_sia_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
1.1 misho 90: {
91: SIAENTITY *siah = NULL;
92: int i;
93: extern int NewArgc;
94: extern char **NewArgv;
1.1.1.2 misho 95: debug_decl(sudo_sia_setup, SUDO_DEBUG_AUTH)
1.1 misho 96:
97: /* Rebuild argv for sia_ses_init() */
98: sudo_argc = NewArgc + 1;
99: sudo_argv = emalloc2(sudo_argc + 1, sizeof(char *));
100: sudo_argv[0] = "sudo";
101: for (i = 0; i < NewArgc; i++)
102: sudo_argv[i + 1] = NewArgv[i];
103: sudo_argv[sudo_argc] = NULL;
104:
105: if (sia_ses_init(&siah, sudo_argc, sudo_argv, NULL, pw->pw_name, user_ttypath, 1, NULL) != SIASUCCESS) {
106:
1.1.1.3 ! misho 107: log_warning(USE_ERRNO|NO_MAIL,
! 108: N_("unable to initialize SIA session"));
1.1.1.2 misho 109: debug_return_int(AUTH_FATAL);
1.1 misho 110: }
111:
112: auth->data = (void *) siah;
1.1.1.2 misho 113: debug_return_int(AUTH_SUCCESS);
1.1 misho 114: }
115:
116: int
1.1.1.2 misho 117: sudo_sia_verify(struct passwd *pw, char *prompt, sudo_auth *auth)
1.1 misho 118: {
119: SIAENTITY *siah = (SIAENTITY *) auth->data;
1.1.1.2 misho 120: debug_decl(sudo_sia_verify, SUDO_DEBUG_AUTH)
1.1 misho 121:
122: def_prompt = prompt; /* for sudo_collect */
123:
124: /* XXX - need a way to detect user hitting return or EOF at prompt */
125: if (sia_ses_reauthent(sudo_collect, siah) == SIASUCCESS)
1.1.1.2 misho 126: debug_return_int(AUTH_SUCCESS);
1.1 misho 127: else
1.1.1.2 misho 128: debug_return_int(AUTH_FAILURE);
1.1 misho 129: }
130:
131: int
1.1.1.2 misho 132: sudo_sia_cleanup(struct passwd *pw, sudo_auth *auth)
1.1 misho 133: {
134: SIAENTITY *siah = (SIAENTITY *) auth->data;
1.1.1.2 misho 135: debug_decl(sudo_sia_cleanup, SUDO_DEBUG_AUTH)
1.1 misho 136:
137: (void) sia_ses_release(&siah);
138: efree(sudo_argv);
1.1.1.2 misho 139: debug_return_int(AUTH_SUCCESS);
1.1 misho 140: }
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