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/*
* Copyright (c) 1994-1996, 1998-1999, 2001, 2003
* Todd C. Miller <Todd.Miller@courtesan.com>.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif /* HAVE_STRING_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_ERR_H
# include <err.h>
#else
# include "emul/err.h"
#endif /* HAVE_ERR_H */
#include <pwd.h>
#if defined(HAVE_SKEY)
# include <skey.h>
# define RFC1938 skey
# ifdef __NetBSD__
# define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
# else
# define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
# endif
# define rfc1938verify(a,b) skeyverify((a),(b))
#elif defined(HAVE_OPIE)
# include <opie.h>
# define RFC1938 opie
# define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
# define rfc1938verify(a,b) opieverify((a),(b))
#endif
#include "sudo.h"
#include "sudo_auth.h"
#ifndef lint
static const char rcsid[] = "$Sudo: rfc1938.c,v 1.16 2004/02/13 21:36:47 millert Exp $";
#endif /* lint */
int
rfc1938_setup(pw, promptp, auth)
struct passwd *pw;
char **promptp;
sudo_auth *auth;
{
char challenge[256];
static char *orig_prompt = NULL, *new_prompt = NULL;
static int op_len, np_size;
static struct RFC1938 rfc1938;
/* Stash a pointer to the rfc1938 struct if we have not initialized */
if (!auth->data)
auth->data = &rfc1938;
/* Save the original prompt */
if (orig_prompt == NULL) {
orig_prompt = *promptp;
op_len = strlen(orig_prompt);
/* Ignore trailing colon (we will add our own) */
if (orig_prompt[op_len - 1] == ':')
op_len--;
else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
&& orig_prompt[op_len - 2] == ':')
op_len -= 2;
}
#ifdef HAVE_SKEY
/* Close old stream */
if (rfc1938.keyfile)
(void) fclose(rfc1938.keyfile);
#endif
/*
* Look up the user and get the rfc1938 challenge.
* If the user is not in the OTP db, only post a fatal error if
* we are running alone (since they may just use a normal passwd).
*/
if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
if (IS_ONEANDONLY(auth)) {
warnx("you do not exist in the %s database", auth->name);
return(AUTH_FATAL);
} else {
return(AUTH_FAILURE);
}
}
/* Get space for new prompt with embedded challenge */
if (np_size < op_len + strlen(challenge) + 7) {
np_size = op_len + strlen(challenge) + 7;
new_prompt = (char *) erealloc(new_prompt, np_size);
}
if (def_long_otp_prompt)
(void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
else
(void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
orig_prompt, challenge);
*promptp = new_prompt;
return(AUTH_SUCCESS);
}
int
rfc1938_verify(pw, pass, auth)
struct passwd *pw;
char *pass;
sudo_auth *auth;
{
if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
return(AUTH_SUCCESS);
else
return(AUTH_FAILURE);
}
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