Annotation of embedaddon/sudo/plugins/sudoers/auth/rfc1938.c, revision 1.1.1.3
1.1 misho 1: /*
1.1.1.3 ! misho 2: * Copyright (c) 1994-1996, 1998-2005, 2010-2012
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: *
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 <stdio.h>
26: #ifdef STDC_HEADERS
27: # include <stdlib.h>
28: # include <stddef.h>
29: #else
30: # ifdef HAVE_STDLIB_H
31: # include <stdlib.h>
32: # endif
33: #endif /* STDC_HEADERS */
34: #ifdef HAVE_STRING_H
35: # include <string.h>
36: #endif /* HAVE_STRING_H */
37: #ifdef HAVE_STRINGS_H
38: # include <strings.h>
39: #endif /* HAVE_STRINGS_H */
40: #ifdef HAVE_UNISTD_H
41: # include <unistd.h>
42: #endif /* HAVE_UNISTD_H */
43: #include <pwd.h>
44:
45: #if defined(HAVE_SKEY)
46: # include <skey.h>
47: # define RFC1938 skey
48: # ifdef HAVE_RFC1938_SKEYCHALLENGE
49: # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
50: # else
51: # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
52: # endif
53: # define rfc1938verify(a,b) skeyverify((a),(b))
54: #elif defined(HAVE_OPIE)
55: # include <opie.h>
56: # define RFC1938 opie
57: # define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
58: # define rfc1938verify(a,b) opieverify((a),(b))
59: #endif
60:
61: #include "sudoers.h"
62: #include "sudo_auth.h"
63:
64: int
1.1.1.2 misho 65: sudo_rfc1938_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
1.1 misho 66: {
67: char challenge[256];
68: static char *orig_prompt = NULL, *new_prompt = NULL;
69: static int op_len, np_size;
70: static struct RFC1938 rfc1938;
1.1.1.2 misho 71: debug_decl(sudo_rfc1938_setup, SUDO_DEBUG_AUTH)
1.1 misho 72:
73: /* Stash a pointer to the rfc1938 struct if we have not initialized */
74: if (!auth->data)
75: auth->data = &rfc1938;
76:
77: /* Save the original prompt */
78: if (orig_prompt == NULL) {
79: orig_prompt = *promptp;
80: op_len = strlen(orig_prompt);
81:
82: /* Ignore trailing colon (we will add our own) */
83: if (orig_prompt[op_len - 1] == ':')
84: op_len--;
85: else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
86: && orig_prompt[op_len - 2] == ':')
87: op_len -= 2;
88: }
89:
90: #ifdef HAVE_SKEY
91: /* Close old stream */
92: if (rfc1938.keyfile)
93: (void) fclose(rfc1938.keyfile);
94: #endif
95:
96: /*
97: * Look up the user and get the rfc1938 challenge.
98: * If the user is not in the OTP db, only post a fatal error if
99: * we are running alone (since they may just use a normal passwd).
100: */
101: if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
102: if (IS_ONEANDONLY(auth)) {
103: warningx(_("you do not exist in the %s database"), auth->name);
1.1.1.2 misho 104: debug_return_int(AUTH_FATAL);
1.1 misho 105: } else {
1.1.1.2 misho 106: debug_return_int(AUTH_FAILURE);
1.1 misho 107: }
108: }
109:
110: /* Get space for new prompt with embedded challenge */
111: if (np_size < op_len + strlen(challenge) + 7) {
112: np_size = op_len + strlen(challenge) + 7;
113: new_prompt = (char *) erealloc(new_prompt, np_size);
114: }
115:
116: if (def_long_otp_prompt)
117: (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
118: else
119: (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
120: orig_prompt, challenge);
121:
122: *promptp = new_prompt;
1.1.1.2 misho 123: debug_return_int(AUTH_SUCCESS);
1.1 misho 124: }
125:
126: int
1.1.1.2 misho 127: sudo_rfc1938_verify(struct passwd *pw, char *pass, sudo_auth *auth)
1.1 misho 128: {
1.1.1.2 misho 129: debug_decl(sudo_rfc1938_verify, SUDO_DEBUG_AUTH)
1.1 misho 130:
131: if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
1.1.1.2 misho 132: debug_return_int(AUTH_SUCCESS);
1.1 misho 133: else
1.1.1.2 misho 134: debug_return_int(AUTH_FAILURE);
1.1 misho 135: }
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