2 * Copyright (c) 1994-1996, 1998-2005, 2010
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)
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 rfc1938_setup(pw, promptp, auth)
72 static char *orig_prompt = NULL, *new_prompt = NULL;
73 static int op_len, np_size;
74 static struct RFC1938 rfc1938;
76 /* Stash a pointer to the rfc1938 struct if we have not initialized */
78 auth->data = &rfc1938;
80 /* Save the original prompt */
81 if (orig_prompt == NULL) {
82 orig_prompt = *promptp;
83 op_len = strlen(orig_prompt);
85 /* Ignore trailing colon (we will add our own) */
86 if (orig_prompt[op_len - 1] == ':')
88 else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
89 && orig_prompt[op_len - 2] == ':')
94 /* Close old stream */
96 (void) fclose(rfc1938.keyfile);
100 * Look up the user and get the rfc1938 challenge.
101 * If the user is not in the OTP db, only post a fatal error if
102 * we are running alone (since they may just use a normal passwd).
104 if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
105 if (IS_ONEANDONLY(auth)) {
106 warningx("you do not exist in the %s database", auth->name);
109 return(AUTH_FAILURE);
113 /* Get space for new prompt with embedded challenge */
114 if (np_size < op_len + strlen(challenge) + 7) {
115 np_size = op_len + strlen(challenge) + 7;
116 new_prompt = (char *) erealloc(new_prompt, np_size);
119 if (def_long_otp_prompt)
120 (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
122 (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
123 orig_prompt, challenge);
125 *promptp = new_prompt;
126 return(AUTH_SUCCESS);
130 rfc1938_verify(pw, pass, auth)
136 if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
137 return(AUTH_SUCCESS);
139 return(AUTH_FAILURE);