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/*
* Copyright (c) 2003 Ben Lindstrom. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 "includes.h"
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>
# if defined(HAVE_CRYPT_H) && !defined(HAVE_SECUREWARE)
# include <crypt.h>
# endif
# ifdef __hpux
# include <hpsecurity.h>
# include <prot.h>
# endif
# ifdef HAVE_SECUREWARE
# include <sys/security.h>
# include <sys/audit.h>
# include <prot.h>
# endif
# if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
# include <shadow.h>
# endif
# if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW)
# include <sys/label.h>
# include <sys/audit.h>
# include <pwdadj.h>
# endif
# if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT)
# include "md5crypt.h"
# endif
# if defined(WITH_OPENSSL) && !defined(HAVE_CRYPT) && defined(HAVE_DES_CRYPT)
# include <openssl/des.h>
# define crypt DES_crypt
# endif
/*
* Pick an appropriate password encryption type and salt for the running
* system by searching through accounts until we find one that has a valid
* salt. Usually this will be root unless the root account is locked out.
* If we don't find one we return a traditional DES-based salt.
*/
static const char *
pick_salt(void)
{
struct passwd *pw;
char *passwd, *p;
size_t typelen;
static char salt[32];
if (salt[0] != '\0')
return salt;
strlcpy(salt, "xx", sizeof(salt));
setpwent();
while ((pw = getpwent()) != NULL) {
passwd = shadow_pw(pw);
if (passwd[0] == '$' && (p = strrchr(passwd+1, '$')) != NULL) {
typelen = p - passwd + 1;
strlcpy(salt, passwd, MIN(typelen, sizeof(salt)));
explicit_bzero(passwd, strlen(passwd));
goto out;
}
}
out:
endpwent();
return salt;
}
char *
xcrypt(const char *password, const char *salt)
{
char *crypted;
/*
* If we don't have a salt we are encrypting a fake password for
* for timing purposes. Pick an appropriate salt.
*/
if (salt == NULL)
salt = pick_salt();
# ifdef HAVE_MD5_PASSWORDS
if (is_md5_salt(salt))
crypted = md5_crypt(password, salt);
else
crypted = crypt(password, salt);
# elif defined(__hpux) && !defined(HAVE_SECUREWARE)
if (iscomsec())
crypted = bigcrypt(password, salt);
else
crypted = crypt(password, salt);
# elif defined(HAVE_SECUREWARE)
crypted = bigcrypt(password, salt);
# else
crypted = crypt(password, salt);
# endif
return crypted;
}
/*
* Handle shadowed password systems in a cleaner way for portable
* version.
*/
char *
shadow_pw(struct passwd *pw)
{
char *pw_password = pw->pw_passwd;
# if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
struct spwd *spw = getspnam(pw->pw_name);
if (spw != NULL)
pw_password = spw->sp_pwdp;
# endif
#ifdef USE_LIBIAF
return(get_iaf_password(pw));
#endif
# if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW)
struct passwd_adjunct *spw;
if (issecure() && (spw = getpwanam(pw->pw_name)) != NULL)
pw_password = spw->pwa_passwd;
# elif defined(HAVE_SECUREWARE)
struct pr_passwd *spw = getprpwnam(pw->pw_name);
if (spw != NULL)
pw_password = spw->ufld.fd_encrypt;
# endif
return pw_password;
}
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