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/*
* Copyright (c) 1994-1996,1998-1999 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 4. Products derived from this software may not be called "Sudo" nor
* may "Sudo" appear in their names without specific prior written
* permission from the author.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <stdio.h>
#ifdef STDC_HEADERS
#include <stdlib.h>
#endif /* STDC_HEADERS */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif /* HAVE_STRINGS_H */
#include <sys/param.h>
#include <sys/types.h>
#include <pwd.h>
#if defined(HAVE_SKEY)
#include <skey.h>
#define RFC1938 skey
#define rfc1938challenge skeychallenge
#define rfc1938verify skeyverify
#elif defined(HAVE_OPIE)
#include <opie.h>
#define RFC1938 opie
#define rfc1938challenge opiechallenge
#define rfc1938verify opieverify
#endif
#include "sudo.h"
#include "sudo_auth.h"
#ifndef lint
static const char rcsid[] = "$Sudo: rfc1938.c,v 1.8 1999/10/07 21:21:07 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) != 0) {
if (IS_ONEANDONLY(auth)) {
(void) fprintf(stderr,
"%s: You do not exist in the %s database.\n",
Argv[0], 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_flag(I_LONG_OTP_PROMPT))
(void) sprintf(new_prompt, "%s\n%s", challenge, orig_prompt);
else
(void) sprintf(new_prompt, "%.*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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