X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/d94aa2aef6fde33e25122a8392010e557fbf6071..554e28b2f8715bbb75e25474fa231b0cfc81f513:/auth-passwd.c diff --git a/auth-passwd.c b/auth-passwd.c index 9edffd4f..3546636a 100644 --- a/auth-passwd.c +++ b/auth-passwd.c @@ -2,90 +2,199 @@ * 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" +RCSID("$OpenBSD: auth-passwd.c,v 1.23 2001/06/26 16:15:23 dugsong Exp $"); -#ifndef USE_PAM - -RCSID("$Id$"); +#if !defined(USE_PAM) && !defined(HAVE_OSF_SIA) #include "packet.h" -#include "ssh.h" -#include "servconf.h" #include "xmalloc.h" +#include "log.h" +#include "servconf.h" +#include "auth.h" -#ifdef HAVE_SHADOW_H +#ifdef HAVE_CRYPT_H +# include +#endif +#ifdef WITH_AIXAUTHENTICATE +# include +#endif +#ifdef __hpux +# include +# include +#endif +#ifdef HAVE_SCO_PROTECTED_PW +# include +# include +# include +#endif /* HAVE_SCO_PROTECTED_PW */ +#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) # include #endif -#if defined(HAVE_CRYPT_H) && !defined(CRYPT_H_BREAKS_BUILD) -# include -#endif /* defined(HAVE_CRYPT_H) && !defined(CRYPT_H_BREAKS_BUILD) */ +#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 + + +extern ServerOptions options; + /* * 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; char *encrypted_password; char *pw_password; char *salt; -#ifdef HAVE_SHADOW_H +#ifdef __hpux + struct pr_passwd *spw; +#endif +#ifdef HAVE_SCO_PROTECTED_PW + struct pr_passwd *spw; +#endif /* HAVE_SCO_PROTECTED_PW */ +#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) struct spwd *spw; #endif +#if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) + struct passwd_adjunct *spw; +#endif +#ifdef WITH_AIXAUTHENTICATE + char *authmsg; + char *loginmsg; + int reenter = 1; +#endif - 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; - -#ifdef SKEY - if (options.skey_authentication == 1) { - int ret = auth_skey_password(pw, password); +#ifndef HAVE_CYGWIN + if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES) + return 0; +#endif +#ifdef HAVE_CYGWIN + /* + * Empty password is only possible on NT if the user has _really_ + * an empty password and authentication is done, though. + */ + if (!is_winnt) +#endif + if (*password == '\0' && options.permit_empty_passwd == 0) + return 0; +#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 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 + return (authenticate(pw->pw_name,password,&reenter,&authmsg) == 0); +#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) +#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; + /* + * 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) */ + +#ifdef HAVE_SCO_PROTECTED_PW + spw = getprpwnam(pw->pw_name); + if (spw != NULL) + pw_password = spw->ufld.fd_encrypt; +#endif /* HAVE_SCO_PROTECTED_PW */ + +#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) */ + +#if defined(__hpux) + if (iscomsec() && (spw = getprpwnam(pw->pw_name)) != NULL) + pw_password = spw->ufld.fd_encrypt; +#endif /* defined(__hpux) */ /* 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 @@ -96,11 +205,22 @@ auth_password(struct passwd * pw, const char *password) encrypted_password = md5_crypt(password, salt); else encrypted_password = crypt(password, salt); -#else /* HAVE_MD5_PASSWORDS */ +#else /* HAVE_MD5_PASSWORDS */ +# ifdef __hpux + if (iscomsec()) + encrypted_password = bigcrypt(password, salt); + else + encrypted_password = crypt(password, salt); +# else +# ifdef HAVE_SCO_PROTECTED_PW + encrypted_password = bigcrypt(password, salt); +# else encrypted_password = crypt(password, salt); -#endif /* HAVE_MD5_PASSWORDS */ +# endif /* HAVE_SCO_PROTECTED_PW */ +# endif /* __hpux */ +#endif /* HAVE_MD5_PASSWORDS */ /* Authentication is accepted if the encrypted passwords are identical. */ return (strcmp(encrypted_password, pw_password) == 0); } -#endif /* !USE_PAM */ +#endif /* !USE_PAM && !HAVE_OSF_SIA */