2 * Copyright (c) 1994-1996, 1998-2005, 2010-2011
3 * Todd C. Miller <Todd.Miller@courtesan.com>
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.
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.
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.
24 #include <sys/types.h>
25 #include <sys/param.h>
34 #endif /* STDC_HEADERS */
37 #endif /* HAVE_STRING_H */
40 #endif /* HAVE_STRINGS_H */
43 #endif /* HAVE_UNISTD_H */
46 #if defined(HAVE_SKEY)
49 # ifdef HAVE_RFC1938_SKEYCHALLENGE
50 # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
52 # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
54 # define rfc1938verify(a,b) skeyverify((a),(b))
55 #elif defined(HAVE_OPIE)
58 # define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
59 # define rfc1938verify(a,b) opieverify((a),(b))
63 #include "sudo_auth.h"
66 sudo_rfc1938_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
69 static char *orig_prompt = NULL, *new_prompt = NULL;
70 static int op_len, np_size;
71 static struct RFC1938 rfc1938;
72 debug_decl(sudo_rfc1938_setup, SUDO_DEBUG_AUTH)
74 /* Stash a pointer to the rfc1938 struct if we have not initialized */
76 auth->data = &rfc1938;
78 /* Save the original prompt */
79 if (orig_prompt == NULL) {
80 orig_prompt = *promptp;
81 op_len = strlen(orig_prompt);
83 /* Ignore trailing colon (we will add our own) */
84 if (orig_prompt[op_len - 1] == ':')
86 else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
87 && orig_prompt[op_len - 2] == ':')
92 /* Close old stream */
94 (void) fclose(rfc1938.keyfile);
98 * Look up the user and get the rfc1938 challenge.
99 * If the user is not in the OTP db, only post a fatal error if
100 * we are running alone (since they may just use a normal passwd).
102 if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
103 if (IS_ONEANDONLY(auth)) {
104 warningx(_("you do not exist in the %s database"), auth->name);
105 debug_return_int(AUTH_FATAL);
107 debug_return_int(AUTH_FAILURE);
111 /* Get space for new prompt with embedded challenge */
112 if (np_size < op_len + strlen(challenge) + 7) {
113 np_size = op_len + strlen(challenge) + 7;
114 new_prompt = (char *) erealloc(new_prompt, np_size);
117 if (def_long_otp_prompt)
118 (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
120 (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
121 orig_prompt, challenge);
123 *promptp = new_prompt;
124 debug_return_int(AUTH_SUCCESS);
128 sudo_rfc1938_verify(struct passwd *pw, char *pass, sudo_auth *auth)
130 debug_decl(sudo_rfc1938_verify, SUDO_DEBUG_AUTH)
132 if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
133 debug_return_int(AUTH_SUCCESS);
135 debug_return_int(AUTH_FAILURE);