X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/f498ed15be2bb7c8e1332cc5eb436d7d54715a4b..06f65c16c3d3ab12e27f0d821c247d68ab546a84:/auth-passwd.c diff --git a/auth-passwd.c b/auth-passwd.c index 81721c2f..d419fa0d 100644 --- a/auth-passwd.c +++ b/auth-passwd.c @@ -2,103 +2,233 @@ * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland * All rights reserved - * Created: Sat Mar 18 05:11:38 1995 ylo * Password authentication. This file contains the functions to check whether * the password is valid for the user. + * + * As far as I am concerned, the code I have written for this software + * can be used freely for any purpose. Any derived versions of this + * software must be clearly marked as such, and if the derived work is + * incompatible with the protocol description in the RFC file, it must be + * called by a name other than "ssh" or "Secure Shell". + * + * Copyright (c) 1999 Dug Song. All rights reserved. + * Copyright (c) 2000 Markus Friedl. 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" - -#ifndef HAVE_LIBPAM - -RCSID("$Id$"); +RCSID("$OpenBSD: auth-passwd.c,v 1.27 2002/05/24 16:45:16 stevesk Exp $"); #include "packet.h" -#include "ssh.h" +#include "log.h" #include "servconf.h" -#include "xmalloc.h" - -#ifdef HAVE_SHADOW_H -#include -#endif - -#ifdef HAVE_MD5_PASSWORDS -#include "md5crypt.h" +#include "auth.h" + +#if !defined(USE_PAM) && !defined(HAVE_OSF_SIA) +/* Don't need any of these headers for the PAM or SIA cases */ +# ifdef HAVE_CRYPT_H +# include +# endif +# ifdef WITH_AIXAUTHENTICATE +# include +# endif +# ifdef __hpux +# include +# include +# endif +# ifdef HAVE_SECUREWARE +# include +# include +# include +# endif /* HAVE_SECUREWARE */ +# if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) +# include +# endif +# if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) +# include +# include +# include +# endif +# if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) +# include "md5crypt.h" +# endif /* defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) */ + +# ifdef HAVE_CYGWIN +# undef ERROR +# include +# include +# define is_winnt (GetVersion() < 0x80000000) +# endif +#endif /* !USE_PAM && !HAVE_OSF_SIA */ + +extern ServerOptions options; +#ifdef WITH_AIXAUTHENTICATE +extern char *aixloginmsg; #endif /* * Tries to authenticate the user using password. Returns true if * authentication succeeds. */ -int -auth_password(struct passwd * pw, const char *password) +int +auth_password(Authctxt *authctxt, const char *password) { - extern ServerOptions options; + struct passwd * pw = authctxt->pw; +#if !defined(USE_PAM) && !defined(HAVE_OSF_SIA) char *encrypted_password; char *pw_password; char *salt; -#ifdef HAVE_SHADOW_H +# if defined(__hpux) || defined(HAVE_SECUREWARE) + struct pr_passwd *spw; +# endif /* __hpux || HAVE_SECUREWARE */ +# if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) struct spwd *spw; -#endif +# endif +# if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) + struct passwd_adjunct *spw; +# endif +# ifdef WITH_AIXAUTHENTICATE + char *authmsg; + int authsuccess; + int reenter = 1; +# endif +#endif /* !defined(USE_PAM) && !defined(HAVE_OSF_SIA) */ - if (pw->pw_uid == 0 && options.permit_root_login == 2) - return 0; - if (*password == '\0' && options.permit_empty_passwd == 0) - return 0; /* deny if no user. */ if (pw == NULL) return 0; +#ifndef HAVE_CYGWIN + if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_NO_PASSWD) + return 0; +#endif + if (*password == '\0' && options.permit_empty_passwd == 0) + return 0; -#ifdef SKEY - if (options.skey_authentication == 1) { - int ret = auth_skey_password(pw, password); +#if defined(USE_PAM) + return auth_pam_password(authctxt, password); +#elif defined(HAVE_OSF_SIA) + return auth_sia_password(authctxt, password); +#else +# ifdef KRB5 + if (options.kerberos_authentication == 1) { + int ret = auth_krb5_password(authctxt, password); if (ret == 1 || ret == 0) return ret; /* Fall back to ordinary passwd authentication. */ } -#endif -#ifdef KRB4 +# endif +# ifdef HAVE_CYGWIN + if (is_winnt) { + HANDLE hToken = cygwin_logon_user(pw, password); + + if (hToken == INVALID_HANDLE_VALUE) + return 0; + cygwin_set_impersonation_token(hToken); + return 1; + } +# endif +# ifdef WITH_AIXAUTHENTICATE + authsuccess = (authenticate(pw->pw_name,password,&reenter,&authmsg) == 0); + + if (authsuccess) + /* We don't have a pty yet, so just label the line as "ssh" */ + if (loginsuccess(authctxt->user, + get_canonical_hostname(options.verify_reverse_mapping), + "ssh", &aixloginmsg) < 0) + aixloginmsg = NULL; + + return(authsuccess); +# endif +# ifdef KRB4 if (options.kerberos_authentication == 1) { - int ret = auth_krb4_password(pw, password); + int ret = auth_krb4_password(authctxt, password); if (ret == 1 || ret == 0) return ret; /* Fall back to ordinary passwd authentication. */ } -#endif - - /* Check for users with no password. */ - if (strcmp(password, "") == 0 && strcmp(pw->pw_passwd, "") == 0) +# endif +# ifdef BSD_AUTH + if (auth_userokay(pw->pw_name, authctxt->style, "auth-ssh", + (char *)password) == 0) + return 0; + else return 1; - +# endif pw_password = pw->pw_passwd; -#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) + /* + * Various interfaces to shadow or protected password data + */ +# if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) spw = getspnam(pw->pw_name); - if (spw == NULL) - return(0); + if (spw != NULL) + pw_password = spw->sp_pwdp; +# endif /* defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) */ + +# if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) + if (issecure() && (spw = getpwanam(pw->pw_name)) != NULL) + pw_password = spw->pwa_passwd; +# endif /* defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) */ + +# ifdef HAVE_SECUREWARE + if ((spw = getprpwnam(pw->pw_name)) != NULL) + pw_password = spw->ufld.fd_encrypt; +# endif /* HAVE_SECUREWARE */ + +# if defined(__hpux) && !defined(HAVE_SECUREWARE) + if (iscomsec() && (spw = getprpwnam(pw->pw_name)) != NULL) + pw_password = spw->ufld.fd_encrypt; +# endif /* defined(__hpux) && !defined(HAVE_SECUREWARE) */ /* Check for users with no password. */ - if (strcmp(password, "") == 0 && strcmp(spw->sp_pwdp, "") == 0) + if ((password[0] == '\0') && (pw_password[0] == '\0')) return 1; - pw_password = spw->sp_pwdp; -#endif /* defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) */ - if (pw_password[0] != '\0') salt = pw_password; else salt = "xx"; -#ifdef HAVE_MD5_PASSWORDS +# ifdef HAVE_MD5_PASSWORDS if (is_md5_salt(salt)) encrypted_password = md5_crypt(password, salt); else encrypted_password = crypt(password, salt); -#else /* HAVE_MD5_PASSWORDS */ +# else /* HAVE_MD5_PASSWORDS */ +# if defined(__hpux) && !defined(HAVE_SECUREWARE) + if (iscomsec()) + encrypted_password = bigcrypt(password, salt); + else + encrypted_password = crypt(password, salt); +# else +# ifdef HAVE_SECUREWARE + encrypted_password = bigcrypt(password, salt); +# else encrypted_password = crypt(password, salt); -#endif /* HAVE_MD5_PASSWORDS */ +# endif /* HAVE_SECUREWARE */ +# endif /* __hpux && !defined(HAVE_SECUREWARE) */ +# endif /* HAVE_MD5_PASSWORDS */ /* Authentication is accepted if the encrypted passwords are identical. */ return (strcmp(encrypted_password, pw_password) == 0); +#endif /* !USE_PAM && !HAVE_OSF_SIA */ } -#endif /* !HAVE_LIBPAM */