Annotation of embedaddon/sudo/plugins/sudoers/auth/kerb4.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: *
17: * Sponsored in part by the Defense Advanced Research Projects
18: * Agency (DARPA) and Air Force Research Laboratory, Air Force
19: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
20: */
21:
22: #include <config.h>
23:
24: #include <sys/types.h>
25: #include <sys/param.h>
26: #include <stdio.h>
27: #ifdef STDC_HEADERS
28: # include <stdlib.h>
29: # include <stddef.h>
30: #else
31: # ifdef HAVE_STDLIB_H
32: # include <stdlib.h>
33: # endif
34: #endif /* STDC_HEADERS */
35: #ifdef HAVE_STRING_H
36: # include <string.h>
37: #endif /* HAVE_STRING_H */
38: #ifdef HAVE_STRINGS_H
39: # include <strings.h>
40: #endif /* HAVE_STRING_H */
41: #ifdef HAVE_UNISTD_H
42: # include <unistd.h>
43: #endif /* HAVE_UNISTD_H */
44: #include <pwd.h>
45: #include <krb.h>
46:
47: #include "sudoers.h"
48: #include "sudo_auth.h"
49:
50: int
51: kerb4_init(struct passwd *pw, sudo_auth *auth)
52: {
53: static char realm[REALM_SZ];
54:
55: /* Don't try to verify root */
56: if (pw->pw_uid == 0)
57: return AUTH_FAILURE;
58:
59: /* Get the local realm, or retrun failure (no krb.conf) */
60: if (krb_get_lrealm(realm, 1) != KSUCCESS)
61: return AUTH_FAILURE;
62:
63: /* Stash a pointer to the realm (used in kerb4_verify) */
64: auth->data = (void *) realm;
65:
66: return AUTH_SUCCESS;
67: }
68:
69: int
70: kerb4_verify(struct passwd *pw, char *pass, sudo_auth *auth)
71: {
72: char tkfile[sizeof(_PATH_SUDO_TIMEDIR) + 4 + MAX_UID_T_LEN];
73: char *realm = (char *) auth->data;
74: int error;
75:
76: /*
77: * Set the ticket file to be in sudo sudo timedir so we don't
78: * wipe out other (real) kerberos tickets.
79: */
80: (void) snprintf(tkfile, sizeof(tkfile), "%s/tkt%u",
81: _PATH_SUDO_TIMEDIR, (unsigned int) pw->pw_uid);
82: (void) krb_set_tkt_string(tkfile);
83:
84: /* Convert the password to a ticket given. */
85: error = krb_get_pw_in_tkt(pw->pw_name, "", realm, "krbtgt", realm,
86: DEFAULT_TKT_LIFE, pass);
87:
88: switch (error) {
89: case INTK_OK:
90: dest_tkt(); /* we are done with the temp ticket */
91: return AUTH_SUCCESS;
92: break;
93: case INTK_BADPW:
94: case KDC_PR_UNKNOWN:
95: break;
96: default:
97: (void) fprintf(stderr, "Warning: Kerberos error: %s\n",
98: krb_err_txt[error]);
99: }
100:
101: return AUTH_FAILURE;
102: }
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