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authorDamien Miller <djm@mindrot.org>2002-04-13 11:04:40 +1000
committerDamien Miller <djm@mindrot.org>2002-04-13 11:04:40 +1000
commitfd4c9eee25e4e796b714477c3fbb0286ebe50fb7 (patch)
tree2b9995e4425eac437a6f1b195abf9f096cda0edb
parent927dfd2d7eb8801e444a3bcff7fdf7a628a779f0 (diff)
- (djm) Add KrbV support patch from Simon Wilkinson <simon@sxw.org.uk>
-rw-r--r--CREDITS4
-rw-r--r--ChangeLog5
-rw-r--r--Makefile.in4
-rw-r--r--acconfig.h8
-rw-r--r--auth-krb5.c115
-rw-r--r--configure.ac45
-rw-r--r--servconf.c11
-rw-r--r--sshconnect1.c52
8 files changed, 230 insertions, 14 deletions
diff --git a/CREDITS b/CREDITS
index d0b320a5..ef267530 100644
--- a/CREDITS
+++ b/CREDITS
@@ -75,7 +75,7 @@ Philippe WILLEM <Philippe.WILLEM@urssaf.fr> - Bugfixes
Phill Camp <P.S.S.Camp@ukc.ac.uk> - login code fix
Rip Loomis <loomisg@cist.saic.com> - Solaris package support, fixes
SAKAI Kiyotaka <ksakai@kso.netwk.ntt-at.co.jp> - Multiple bugfixes
-Simon Wilkinson <sxw@dcs.ed.ac.uk> - PAM fixes
+Simon Wilkinson <sxw@dcs.ed.ac.uk> - PAM fixes, Compat with MIT KrbV
Svante Signell <svante.signell@telia.com> - Bugfixes
Thomas Neumann <tom@smart.ruhr.de> - Shadow passwords
Tim Rice <tim@multitalents.net> - Portability & SCO fixes
@@ -90,5 +90,5 @@ Apologies to anyone I have missed.
Damien Miller <djm@mindrot.org>
-$Id: CREDITS,v 1.65 2002/03/05 03:38:35 mouring Exp $
+$Id: CREDITS,v 1.66 2002/04/13 01:04:40 djm Exp $
diff --git a/ChangeLog b/ChangeLog
index a6d20ed1..486e3505 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+20020413
+ - (djm) Add KrbV support patch from Simon Wilkinson <simon@sxw.org.uk>
+
20020412
- (stevesk) [auth-sia.[ch]] add BSD license from Chris Adams
- (tim) [configure.ac] add <sys/types.h> to msghdr tests. Change -L
@@ -8231,4 +8234,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
-$Id: ChangeLog,v 1.2050 2002/04/12 18:51:22 mouring Exp $
+$Id: ChangeLog,v 1.2051 2002/04/13 01:04:40 djm Exp $
diff --git a/Makefile.in b/Makefile.in
index 32f95409..4e0744c3 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,4 +1,4 @@
-# $Id: Makefile.in,v 1.201 2002/04/05 16:11:46 mouring Exp $
+# $Id: Makefile.in,v 1.202 2002/04/13 01:04:41 djm Exp $
prefix=@prefix@
exec_prefix=@exec_prefix@
@@ -54,7 +54,7 @@ LIBSSH_OBJS=atomicio.o authfd.o authfile.o bufaux.o buffer.o canohost.o channels
SSHOBJS= ssh.o sshconnect.o sshconnect1.o sshconnect2.o sshtty.o readconf.o clientloop.o
-SSHDOBJS= sshd.o auth.o auth1.o auth2.o auth-chall.o auth2-chall.o auth-rhosts.o auth-options.o auth-krb4.o auth-pam.o auth2-pam.o auth-passwd.o auth-rsa.o auth-rh-rsa.o auth-sia.o sshpty.o sshlogin.o loginrec.o servconf.o serverloop.o md5crypt.o session.o groupaccess.o auth-skey.o auth-bsdauth.o monitor_mm.o monitor.o
+SSHDOBJS= sshd.o auth.o auth1.o auth2.o auth-chall.o auth2-chall.o auth-rhosts.o auth-options.o auth-krb4.o auth-krb5.o auth-pam.o auth2-pam.o auth-passwd.o auth-rsa.o auth-rh-rsa.o auth-sia.o sshpty.o sshlogin.o loginrec.o servconf.o serverloop.o md5crypt.o session.o groupaccess.o auth-skey.o auth-bsdauth.o monitor_mm.o monitor.o
MANPAGES = scp.1.out ssh-add.1.out ssh-agent.1.out ssh-keygen.1.out ssh-keyscan.1.out ssh.1.out sshd.8.out sftp-server.8.out sftp.1.out
MANPAGES_IN = scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh.1 sshd.8 sftp-server.8 sftp.1
diff --git a/acconfig.h b/acconfig.h
index 3f9e56a9..84bf60f0 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -1,4 +1,4 @@
-/* $Id: acconfig.h,v 1.130 2002/04/12 03:35:40 tim Exp $ */
+/* $Id: acconfig.h,v 1.131 2002/04/13 01:04:41 djm Exp $ */
#ifndef _CONFIG_H
#define _CONFIG_H
@@ -192,6 +192,12 @@
/* Define if compiler implements __func__ */
#undef HAVE___func__
+/* Define if you want Kerberos 5 support */
+#undef KRB5
+
+/* Define this if you are using the Heimdal version of Kerberos V5 */
+#undef HEIMDAL
+
/* Define if you want Kerberos 4 support */
#undef KRB4
diff --git a/auth-krb5.c b/auth-krb5.c
index f878b511..76c2419a 100644
--- a/auth-krb5.c
+++ b/auth-krb5.c
@@ -41,6 +41,9 @@ RCSID("$OpenBSD: auth-krb5.c,v 1.8 2002/03/19 10:49:35 markus Exp $");
#ifdef KRB5
#include <krb5.h>
+#ifndef HEIMDAL
+#define krb5_get_err_text(context,code) error_message(code)
+#endif /* !HEIMDAL */
extern ServerOptions options;
@@ -93,8 +96,15 @@ auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client)
goto err;
fd = packet_get_connection_in();
+#ifdef HEIMDAL
problem = krb5_auth_con_setaddrs_from_fd(authctxt->krb5_ctx,
authctxt->krb5_auth_ctx, &fd);
+#else
+ problem = krb5_auth_con_genaddrs(authctxt->krb5_ctx,
+ authctxt->krb5_auth_ctx,fd,
+ KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR |
+ KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR);
+#endif
if (problem)
goto err;
@@ -108,8 +118,14 @@ auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client)
if (problem)
goto err;
+#ifdef HEIMDAL
problem = krb5_copy_principal(authctxt->krb5_ctx, ticket->client,
&authctxt->krb5_user);
+#else
+ problem = krb5_copy_principal(authctxt->krb5_ctx,
+ ticket->enc_part2->client,
+ &authctxt->krb5_user);
+#endif
if (problem)
goto err;
@@ -160,13 +176,37 @@ auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt)
krb5_error_code problem;
krb5_ccache ccache = NULL;
char *pname;
+ krb5_creds **creds;
if (authctxt->pw == NULL || authctxt->krb5_user == NULL)
return (0);
temporarily_use_uid(authctxt->pw);
+#ifdef HEIMDAL
problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &ccache);
+#else
+{
+ char ccname[40];
+ int tmpfd;
+
+ snprintf(ccname,sizeof(ccname),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid());
+
+ if ((tmpfd = mkstemp(ccname+strlen("FILE:")))==-1) {
+ log("mkstemp(): %.100s", strerror(errno));
+ problem = errno;
+ goto fail;
+ }
+ if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) {
+ log("fchmod(): %.100s", strerror(errno));
+ close(tmpfd);
+ problem = errno;
+ goto fail;
+ }
+ close(tmpfd);
+ problem = krb5_cc_resolve(authctxt->krb5_ctx, ccname, &ccache);
+}
+#endif
if (problem)
goto fail;
@@ -175,10 +215,20 @@ auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt)
if (problem)
goto fail;
+#ifdef HEIMDAL
problem = krb5_rd_cred2(authctxt->krb5_ctx, authctxt->krb5_auth_ctx,
ccache, tgt);
if (problem)
goto fail;
+#else
+ problem = krb5_rd_cred(authctxt->krb5_ctx, authctxt->krb5_auth_ctx,
+ tgt, &creds, NULL);
+ if (problem)
+ goto fail;
+ problem = krb5_cc_store_cred(authctxt->krb5_ctx, ccache, *creds);
+ if (problem)
+ goto fail;
+#endif
authctxt->krb5_fwd_ccache = ccache;
ccache = NULL;
@@ -211,6 +261,12 @@ auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt)
int
auth_krb5_password(Authctxt *authctxt, const char *password)
{
+#ifndef HEIMDAL
+ krb5_creds creds;
+ krb5_principal server;
+ char ccname[40];
+ int tmpfd;
+#endif
krb5_error_code problem;
if (authctxt->pw == NULL)
@@ -227,6 +283,7 @@ auth_krb5_password(Authctxt *authctxt, const char *password)
if (problem)
goto out;
+#ifdef HEIMDAL
problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops,
&authctxt->krb5_fwd_ccache);
if (problem)
@@ -245,13 +302,69 @@ auth_krb5_password(Authctxt *authctxt, const char *password)
if (problem)
goto out;
+#else
+ problem = krb5_get_init_creds_password(authctxt->krb5_ctx, &creds,
+ authctxt->krb5_user, (char *)password, NULL, NULL, 0, NULL, NULL);
+ if (problem)
+ goto out;
+
+ problem = krb5_sname_to_principal(authctxt->krb5_ctx, NULL, NULL,
+ KRB5_NT_SRV_HST, &server);
+ if (problem)
+ goto out;
+
+ restore_uid();
+ problem = krb5_verify_init_creds(authctxt->krb5_ctx, &creds, server,
+ NULL, NULL, NULL);
+ krb5_free_principal(authctxt->krb5_ctx, server);
+ temporarily_use_uid(authctxt->pw);
+ if (problem)
+ goto out;
+
+ if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user,
+ authctxt->pw->pw_name)) {
+ problem = -1;
+ goto out;
+ }
+
+ snprintf(ccname,sizeof(ccname),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid());
+
+ if ((tmpfd = mkstemp(ccname+strlen("FILE:")))==-1) {
+ log("mkstemp(): %.100s", strerror(errno));
+ problem = errno;
+ goto out;
+ }
+
+ if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) {
+ log("fchmod(): %.100s", strerror(errno));
+ close(tmpfd);
+ problem = errno;
+ goto out;
+ }
+ close(tmpfd);
+
+ problem = krb5_cc_resolve(authctxt->krb5_ctx, ccname, &authctxt->krb5_fwd_ccache);
+ if (problem)
+ goto out;
+
+ problem = krb5_cc_initialize(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache,
+ authctxt->krb5_user);
+ if (problem)
+ goto out;
+
+ problem= krb5_cc_store_cred(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache,
+ &creds);
+ if (problem)
+ goto out;
+#endif
+
authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
out:
restore_uid();
if (problem) {
- if (authctxt->krb5_ctx != NULL)
+ if (authctxt->krb5_ctx != NULL && problem!=-1)
debug("Kerberos password authentication failed: %s",
krb5_get_err_text(authctxt->krb5_ctx, problem));
else
diff --git a/configure.ac b/configure.ac
index c0cce4bd..9516bf7f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.43 2002/04/12 17:26:23 tim Exp $
+# $Id: configure.ac,v 1.44 2002/04/13 01:04:41 djm Exp $
AC_INIT
AC_CONFIG_SRCDIR([ssh.c])
@@ -1747,7 +1747,45 @@ AC_ARG_WITH(opensc,
]
)
-# Check whether user wants Kerberos support
+# Check whether user wants Kerberos 5 support
+KRB5_MSG="no"
+AC_ARG_WITH(kerberos5,
+ [ --with-kerberos5=PATH Enable Kerberos 5 support],
+ [
+ if test "x$withval" != "xno" ; then
+ if test "x$withval" = "xyes" ; then
+ KRB5ROOT="/usr/local"
+ else
+ KRB5ROOT=${withval}
+ fi
+ CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include"
+ LDFLAGS="$LDFLAGS -L${KRB5ROOT}/lib"
+ AC_DEFINE(KRB5)
+ KRB5_MSG="yes"
+ AC_MSG_CHECKING(whether we are using Heimdal)
+ AC_TRY_COMPILE([ #include <krb5.h> ],
+ [ char *tmp = heimdal_version; ],
+ [ AC_MSG_RESULT(yes)
+ AC_DEFINE(HEIMDAL)
+ K5LIBS="-lkrb5 -ldes -lcom_err -lasn1 -lroken"
+ ],
+ [ AC_MSG_RESULT(no)
+ K5LIBS="-lkrb5 -lk5crypto -lcom_err"
+ ]
+ )
+ if test ! -z "$need_dash_r" ; then
+ LDFLAGS="$LDFLAGS -R${KRB5ROOT}/lib"
+ fi
+ if test ! -z "$blibpath" ; then
+ blibpath="$blibpath:${KRB5ROOT}/lib"
+ fi
+ AC_CHECK_LIB(resolv, dn_expand, , )
+
+ KRB5=yes
+ fi
+ ]
+)
+# Check whether user wants Kerberos 4 support
KRB4_MSG="no"
AC_ARG_WITH(kerberos4,
[ --with-kerberos4=PATH Enable Kerberos 4 support],
@@ -1827,7 +1865,7 @@ AC_ARG_WITH(afs,
fi
]
)
-LIBS="$LIBS $KLIBS"
+LIBS="$LIBS $KLIBS $K5LIBS"
# Looking for programs, paths and files
AC_ARG_WITH(rsh,
@@ -2399,6 +2437,7 @@ echo " sshd default user PATH: $H"
echo " Manpage format: $MANTYPE"
echo " PAM support: ${PAM_MSG}"
echo " KerberosIV support: $KRB4_MSG"
+echo " KerberosV support: $KRB5_MSG"
echo " Smartcard support: $SCARD_MSG"
echo " AFS support: $AFS_MSG"
echo " S/KEY support: $SKEY_MSG"
diff --git a/servconf.c b/servconf.c
index 8e6ee5bb..8b5ee7bf 100644
--- a/servconf.c
+++ b/servconf.c
@@ -12,8 +12,17 @@
#include "includes.h"
RCSID("$OpenBSD: servconf.c,v 1.105 2002/03/20 19:12:24 stevesk Exp $");
-#if defined(KRB4) || defined(KRB5)
+#if defined(KRB4)
+#include <krb.h>
+#endif
+#if defined(KRB5)
+#ifdef HEIMDAL
#include <krb.h>
+#else
+/* Bodge - but then, so is using the kerberos IV KEYFILE to get a Kerberos V
+ * keytab */
+#define KEYFILE "/etc/krb5.keytab"
+#endif
#endif
#ifdef AFS
#include <kafs.h>
diff --git a/sshconnect1.c b/sshconnect1.c
index 39369413..3b5c7186 100644
--- a/sshconnect1.c
+++ b/sshconnect1.c
@@ -23,6 +23,9 @@ RCSID("$OpenBSD: sshconnect1.c,v 1.49 2002/03/14 15:24:27 markus Exp $");
#endif
#ifdef KRB5
#include <krb5.h>
+#ifndef HEIMDAL
+#define krb5_get_err_text(context,code) error_message(code)
+#endif /* !HEIMDAL */
#endif
#ifdef AFS
#include <kafs.h>
@@ -521,6 +524,23 @@ try_krb5_authentication(krb5_context *context, krb5_auth_context *auth_context)
ret = 0;
goto out;
}
+
+ problem = krb5_auth_con_init(*context, auth_context);
+ if (problem) {
+ debug("Kerberos v5: krb5_auth_con_init failed");
+ ret = 0;
+ goto out;
+ }
+
+#ifndef HEIMDAL
+ problem = krb5_auth_con_setflags(*context, *auth_context,
+ KRB5_AUTH_CONTEXT_RET_TIME);
+ if (problem) {
+ debug("Keberos v5: krb5_auth_con_setflags failed");
+ ret = 0;
+ goto out;
+ }
+#endif
tkfile = krb5_cc_default_name(*context);
if (strncmp(tkfile, "FILE:", 5) == 0)
@@ -597,7 +617,11 @@ try_krb5_authentication(krb5_context *context, krb5_auth_context *auth_context)
if (reply != NULL)
krb5_free_ap_rep_enc_part(*context, reply);
if (ap.length > 0)
+#ifdef HEIMDAL
krb5_data_free(&ap);
+#else
+ krb5_free_data_contents(*context, &ap);
+#endif
return (ret);
}
@@ -610,7 +634,11 @@ send_krb5_tgt(krb5_context context, krb5_auth_context auth_context)
krb5_data outbuf;
krb5_ccache ccache = NULL;
krb5_creds creds;
+#ifdef HEIMDAL
krb5_kdc_flags flags;
+#else
+ int forwardable;
+#endif
const char *remotehost;
memset(&creds, 0, sizeof(creds));
@@ -618,7 +646,13 @@ send_krb5_tgt(krb5_context context, krb5_auth_context auth_context)
fd = packet_get_connection_in();
+#ifdef HEIMDAL
problem = krb5_auth_con_setaddrs_from_fd(context, auth_context, &fd);
+#else
+ problem = krb5_auth_con_genaddrs(context, auth_context, fd,
+ KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR |
+ KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR);
+#endif
if (problem)
goto out;
@@ -630,23 +664,35 @@ send_krb5_tgt(krb5_context context, krb5_auth_context auth_context)
if (problem)
goto out;
+ remotehost = get_canonical_hostname(1);
+
+#ifdef HEIMDAL
problem = krb5_build_principal(context, &creds.server,
strlen(creds.client->realm), creds.client->realm,
"krbtgt", creds.client->realm, NULL);
+#else
+ problem = krb5_build_principal(context, &creds.server,
+ creds.client->realm.length, creds.client->realm.data,
+ "host", remotehost, NULL);
+#endif
if (problem)
goto out;
creds.times.endtime = 0;
+#ifdef HEIMDAL
flags.i = 0;
flags.b.forwarded = 1;
flags.b.forwardable = krb5_config_get_bool(context, NULL,
"libdefaults", "forwardable", NULL);
-
- remotehost = get_canonical_hostname(1);
-
problem = krb5_get_forwarded_creds(context, auth_context,
ccache, flags.i, remotehost, &creds, &outbuf);
+#else
+ forwardable = 1;
+ problem = krb5_fwd_tgt_creds(context, auth_context, remotehost,
+ creds.client, creds.server, ccache, forwardable, &outbuf);
+#endif
+
if (problem)
goto out;