2 * Copyright (c) 1994-1996, 1998-2005, 2010-2012
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>
33 #endif /* STDC_HEADERS */
36 #endif /* HAVE_STRING_H */
39 #endif /* HAVE_STRINGS_H */
42 #endif /* HAVE_UNISTD_H */
45 #if defined(HAVE_SKEY)
48 # ifdef HAVE_RFC1938_SKEYCHALLENGE
49 # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
51 # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
53 # define rfc1938verify(a,b) skeyverify((a),(b))
54 #elif defined(HAVE_OPIE)
57 # define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
58 # define rfc1938verify(a,b) opieverify((a),(b))
62 #include "sudo_auth.h"
65 sudo_rfc1938_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
68 static char *orig_prompt = NULL, *new_prompt = NULL;
69 static int op_len, np_size;
70 static struct RFC1938 rfc1938;
71 debug_decl(sudo_rfc1938_setup, SUDO_DEBUG_AUTH)
73 /* Stash a pointer to the rfc1938 struct if we have not initialized */
75 auth->data = &rfc1938;
77 /* Save the original prompt */
78 if (orig_prompt == NULL) {
79 orig_prompt = *promptp;
80 op_len = strlen(orig_prompt);
82 /* Ignore trailing colon (we will add our own) */
83 if (orig_prompt[op_len - 1] == ':')
85 else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
86 && orig_prompt[op_len - 2] == ':')
91 /* Close old stream */
93 (void) fclose(rfc1938.keyfile);
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).
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);
104 debug_return_int(AUTH_FATAL);
106 debug_return_int(AUTH_FAILURE);
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);
116 if (def_long_otp_prompt)
117 (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
119 (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
120 orig_prompt, challenge);
122 *promptp = new_prompt;
123 debug_return_int(AUTH_SUCCESS);
127 sudo_rfc1938_verify(struct passwd *pw, char *pass, sudo_auth *auth)
129 debug_decl(sudo_rfc1938_verify, SUDO_DEBUG_AUTH)
131 if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
132 debug_return_int(AUTH_SUCCESS);
134 debug_return_int(AUTH_FAILURE);