2 * Copyright (c) 1994-1996, 1998-2005
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 */
38 # ifdef HAVE_STRINGS_H
41 #endif /* HAVE_STRING_H */
44 #endif /* HAVE_UNISTD_H */
47 #if defined(HAVE_SKEY)
51 # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
53 # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
55 # define rfc1938verify(a,b) skeyverify((a),(b))
56 #elif defined(HAVE_OPIE)
59 # define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
60 # define rfc1938verify(a,b) opieverify((a),(b))
64 #include "sudo_auth.h"
67 __unused static const char rcsid[] = "$Sudo: rfc1938.c,v 1.20 2005/02/12 22:56:07 millert Exp $";
71 rfc1938_setup(pw, promptp, auth)
77 static char *orig_prompt = NULL, *new_prompt = NULL;
78 static int op_len, np_size;
79 static struct RFC1938 rfc1938;
81 /* Stash a pointer to the rfc1938 struct if we have not initialized */
83 auth->data = &rfc1938;
85 /* Save the original prompt */
86 if (orig_prompt == NULL) {
87 orig_prompt = *promptp;
88 op_len = strlen(orig_prompt);
90 /* Ignore trailing colon (we will add our own) */
91 if (orig_prompt[op_len - 1] == ':')
93 else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
94 && orig_prompt[op_len - 2] == ':')
99 /* Close old stream */
101 (void) fclose(rfc1938.keyfile);
105 * Look up the user and get the rfc1938 challenge.
106 * If the user is not in the OTP db, only post a fatal error if
107 * we are running alone (since they may just use a normal passwd).
109 if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
110 if (IS_ONEANDONLY(auth)) {
111 warningx("you do not exist in the %s database", auth->name);
114 return(AUTH_FAILURE);
118 /* Get space for new prompt with embedded challenge */
119 if (np_size < op_len + strlen(challenge) + 7) {
120 np_size = op_len + strlen(challenge) + 7;
121 new_prompt = (char *) erealloc(new_prompt, np_size);
124 if (def_long_otp_prompt)
125 (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
127 (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
128 orig_prompt, challenge);
130 *promptp = new_prompt;
131 return(AUTH_SUCCESS);
135 rfc1938_verify(pw, pass, auth)
141 if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
142 return(AUTH_SUCCESS);
144 return(AUTH_FAILURE);