xcrypt.c

OpenSSH 是 SSH （Secure SHell） 协议的免费开源实现。它用安全、加密的网络连接工具代替了 telnet、ftp、 rlogin、rsh 和 rcp 工具。OpenSSH 支持

/*
 * 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"

# ifdef HAVE_CRYPT_H
#  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 

char *
xcrypt(const char *password, const char *salt)
{
	char *crypted;

# 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
# 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;
}