* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, 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_PAM
-
-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 <shadow.h>
-#endif
-
-#ifdef HAVE_MD5_PASSWORDS
-#include "md5crypt.h"
+#include "auth.h"
+
+#if !defined(HAVE_OSF_SIA)
+/* Don't need any of these headers for the SIA cases */
+# ifdef HAVE_CRYPT_H
+# include <crypt.h>
+# endif
+# ifdef WITH_AIXAUTHENTICATE
+# include <login.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 /* HAVE_SECUREWARE */
+# 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 /* defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) */
+
+# ifdef HAVE_CYGWIN
+# undef ERROR
+# include <windows.h>
+# include <sys/cygwin.h>
+# define is_winnt (GetVersion() < 0x80000000)
+# endif
+#endif /* !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;
+ int ok = authctxt->valid;
+#if !defined(HAVE_OSF_SIA)
char *encrypted_password;
-#ifdef HAVE_SHADOW_H
+ char *pw_password;
+ char *salt;
+# 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
+# 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(HAVE_OSF_SIA) */
+
+ /* deny if no user. */
+ if (pw == NULL)
+ ok = 0;
+#ifndef HAVE_CYGWIN
+ if (pw && pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES)
+ ok = 0;
#endif
+ if (*password == '\0' && options.permit_empty_passwd == 0)
+ ok = 0;
- if (pw->pw_uid == 0 && options.permit_root_login == 2) {
- /* Server does not permit root login with password */
+#if defined(HAVE_OSF_SIA)
+ if (!ok)
return 0;
- }
- if (*password == '\0' && options.permit_empty_passwd == 0) {
- /* Server does not permit empty password login */
+ return auth_sia_password(authctxt, password);
+#else
+ if (!ok)
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. */
}
- /* deny if no user. */
- if (pw == NULL)
- return 0;
-
-#ifdef SKEY
- if (options.skey_authentication == 1) {
- if (strncasecmp(password, "s/key", 5) == 0) {
- char *skeyinfo = skey_keyinfo(pw->pw_name);
- if (skeyinfo == NULL) {
- debug("generating fake skeyinfo for %.100s.",
- pw->pw_name);
- skeyinfo = skey_fake_keyinfo(pw->pw_name);
- }
- if (skeyinfo != NULL)
- packet_send_debug(skeyinfo);
- /* Try again. */
- return 0;
- } else if (skey_haskey(pw->pw_name) == 0 &&
- skey_passcheck(pw->pw_name, (char *) password) != -1) {
- /* Authentication succeeded. */
- return 1;
+# 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.use_dns),
+ "ssh", &aixloginmsg) < 0) {
+ aixloginmsg = NULL;
}
- /* Fall back to ordinary passwd authentication. */
}
-#endif
-#if defined(KRB4)
- /* Support for Kerberos v4 authentication - Dug Song
- <dugsong@UMICH.EDU> */
- if (options.kerberos_authentication) {
- AUTH_DAT adata;
- KTEXT_ST tkt;
- struct hostent *hp;
- unsigned long faddr;
- char localhost[MAXHOSTNAMELEN];
- char phost[INST_SZ];
- char realm[REALM_SZ];
- int r;
-
- /* Try Kerberos password authentication only for non-root
- users and only if Kerberos is installed. */
- if (pw->pw_uid != 0 && krb_get_lrealm(realm, 1) == KSUCCESS) {
-
- /* Set up our ticket file. */
- if (!krb4_init(pw->pw_uid)) {
- log("Couldn't initialize Kerberos ticket file for %s!",
- pw->pw_name);
- goto kerberos_auth_failure;
- }
- /* Try to get TGT using our password. */
- r = krb_get_pw_in_tkt((char *) pw->pw_name, "",
- realm, "krbtgt", realm,
- DEFAULT_TKT_LIFE, (char *) password);
- if (r != INTK_OK) {
- packet_send_debug("Kerberos V4 password "
- "authentication for %s failed: %s",
- pw->pw_name, krb_err_txt[r]);
- goto kerberos_auth_failure;
- }
- /* Successful authentication. */
- chown(tkt_string(), pw->pw_uid, pw->pw_gid);
-
- /*
- * Now that we have a TGT, try to get a local
- * "rcmd" ticket to ensure that we are not talking
- * to a bogus Kerberos server.
- */
- (void) gethostname(localhost, sizeof(localhost));
- (void) strlcpy(phost, (char *) krb_get_phost(localhost),
- INST_SZ);
- r = krb_mk_req(&tkt, KRB4_SERVICE_NAME, phost, realm, 33);
-
- if (r == KSUCCESS) {
- if (!(hp = gethostbyname(localhost))) {
- log("Couldn't get local host address!");
- goto kerberos_auth_failure;
- }
- memmove((void *) &faddr, (void *) hp->h_addr,
- sizeof(faddr));
-
- /* Verify our "rcmd" ticket. */
- r = krb_rd_req(&tkt, KRB4_SERVICE_NAME, phost,
- faddr, &adata, "");
- if (r == RD_AP_UNDEC) {
- /*
- * Probably didn't have a srvtab on
- * localhost. Allow login.
- */
- log("Kerberos V4 TGT for %s unverifiable, "
- "no srvtab installed? krb_rd_req: %s",
- pw->pw_name, krb_err_txt[r]);
- } else if (r != KSUCCESS) {
- log("Kerberos V4 %s ticket unverifiable: %s",
- KRB4_SERVICE_NAME, krb_err_txt[r]);
- goto kerberos_auth_failure;
- }
- } else if (r == KDC_PR_UNKNOWN) {
- /* Allow login if no rcmd service exists,
- but log the error. */
- log("Kerberos V4 TGT for %s unverifiable: %s; %s.%s "
- "not registered, or srvtab is wrong?", pw->pw_name,
- krb_err_txt[r], KRB4_SERVICE_NAME, phost);
- } else {
- /* TGT is bad, forget it. Possibly
- spoofed! */
- packet_send_debug("WARNING: Kerberos V4 TGT "
- "possibly spoofed for %s: %s",
- pw->pw_name, krb_err_txt[r]);
- goto kerberos_auth_failure;
- }
-
- /* Authentication succeeded. */
- return 1;
-
- kerberos_auth_failure:
- krb4_cleanup_proc(NULL);
-
- if (!options.kerberos_or_local_passwd)
- return 0;
- } else {
- /* Logging in as root or no local Kerberos realm. */
- packet_send_debug("Unable to authenticate to Kerberos.");
- }
+ return (authsuccess);
+# endif
+# ifdef KRB4
+ if (options.kerberos_authentication == 1) {
+ int ret = auth_krb4_password(authctxt, password);
+ if (ret == 1 || ret == 0)
+ return ret;
/* Fall back to ordinary passwd authentication. */
}
-#endif /* KRB4 */
-
- /* Check for users with no password. */
- if (strcmp(password, "") == 0 && strcmp(pw->pw_passwd, "") == 0) {
- packet_send_debug("Login permitted without a password "
- "because the account has no password.");
+# 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;
-#ifdef HAVE_SHADOW_H
+ /*
+ * 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) */
- if ((spw->sp_namp == NULL) || (strcmp(pw->pw_name, spw->sp_namp) != 0))
- fatal("Shadow lookup returned garbage.");
+# ifdef HAVE_SECUREWARE
+ if ((spw = getprpwnam(pw->pw_name)) != NULL)
+ pw_password = spw->ufld.fd_encrypt;
+# endif /* HAVE_SECUREWARE */
- if (strlen(spw->sp_pwdp) < 3)
- return(0);
+# 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) */
- /* Encrypt the candidate password using the proper salt. */
-#ifdef HAVE_MD5_PASSWORDS
- if (is_md5_salt(spw->sp_pwdp))
- encrypted_password = md5_crypt(password, spw->sp_pwdp);
+ /* Check for users with no password. */
+ if ((password[0] == '\0') && (pw_password[0] == '\0'))
+ return 1;
+
+ if (pw_password[0] != '\0')
+ salt = pw_password;
else
- encrypted_password = crypt(password, spw->sp_pwdp);
-#else /* HAVE_MD5_PASSWORDS */
- encrypted_password = crypt(password, spw->sp_pwdp);
-#endif /* HAVE_MD5_PASSWORDS */
- /* Authentication is accepted if the encrypted passwords are identical. */
- return (strcmp(encrypted_password, spw->sp_pwdp) == 0);
-#else /* !HAVE_SHADOW_H */
- encrypted_password = crypt(password,
- (pw->pw_passwd[0] && pw->pw_passwd[1]) ? pw->pw_passwd : "xx");
+ salt = "xx";
+
+# 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 */
+# 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_SECUREWARE */
+# endif /* __hpux && !defined(HAVE_SECUREWARE) */
+# endif /* HAVE_MD5_PASSWORDS */
/* Authentication is accepted if the encrypted passwords are identical. */
- return (strcmp(encrypted_password, pw->pw_passwd) == 0);
-#endif /* !HAVE_SHADOW_H */
+ return (strcmp(encrypted_password, pw_password) == 0);
+#endif /* !HAVE_OSF_SIA */
}
-#endif /* !HAVE_PAM */
andersk / openssh.git / blobdiff