- typo

[packages/openssh.git] / openssh-lpk.patch

This is a forward-port of the OpenSSH LPK support patch.

It adds support for storing OpenSSH public keys in LDAP. It also supports
grouping of machines in the LDAP data to limit users to specific machines.

The latest homepage for the LPK project is:
http://code.google.com/p/openssh-lpk/

The 0.3.10 version of the patch includes a fix for 64-bit platforms, as
discovered by Gentoo, where the bind timeout and search timeout values were not
being parsed correctly: http://bugs.gentoo.org/210110

Forward-ported-from: openssh-lpk-5.1p1-0.3.9.patch
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/auth2-pubkey.c openssh-5.1p1+lpk/auth2-pubkey.c
--- openssh-5.1p1.orig/auth2-pubkey.c	2008-07-03 19:54:25.000000000 -0700
+++ openssh-5.1p1+lpk/auth2-pubkey.c	2008-08-23 15:02:47.000000000 -0700
@@ -55,6 +55,10 @@
 #include "monitor_wrap.h"
 #include "misc.h"
 
+#ifdef WITH_LDAP_PUBKEY
+#include "ldapauth.h"
+#endif
+
 /* import */
 extern ServerOptions options;
 extern u_char *session_id2;
@@ -187,10 +191,79 @@
 	u_long linenum = 0;
 	Key *found;
 	char *fp;
+#ifdef WITH_LDAP_PUBKEY
+	ldap_key_t * k;
+	unsigned int i = 0;
+#endif
 
 	/* Temporarily use the user's uid. */
 	temporarily_use_uid(pw);
 
+#ifdef WITH_LDAP_PUBKEY
+ 	found_key = 0;
+ 	/* allocate a new key type */
+ 	found = key_new(key->type);
+ 
+ 	/* first check if the options is enabled, then try.. */
+	if (options.lpk.on) {
+	    debug("[LDAP] trying LDAP first uid=%s",pw->pw_name);
+	    if (ldap_ismember(&options.lpk, pw->pw_name) > 0) {
+		if ((k = ldap_getuserkey(&options.lpk, pw->pw_name)) != NULL) {
+		    /* Skip leading whitespace, empty and comment lines. */
+		    for (i = 0 ; i < k->num ; i++) {
+			/* dont forget if multiple keys to reset options */
+			char *cp, *options = NULL;
+
+			for (cp = (char *)k->keys[i]->bv_val; *cp == ' ' || *cp == '\t'; cp++)
+			    ;
+			if (!*cp || *cp == '\n' || *cp == '#')
+			    continue;
+
+			if (key_read(found, &cp) != 1) {
+			    /* no key?  check if there are options for this key */
+			    int quoted = 0;
+			    debug2("[LDAP] user_key_allowed: check options: '%s'", cp);
+			    options = cp;
+			    for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
+				if (*cp == '\\' && cp[1] == '"')
+				    cp++;	/* Skip both */
+				else if (*cp == '"')
+				    quoted = !quoted;
+			    }
+			    /* Skip remaining whitespace. */
+			    for (; *cp == ' ' || *cp == '\t'; cp++)
+				;
+			    if (key_read(found, &cp) != 1) {
+				debug2("[LDAP] user_key_allowed: advance: '%s'", cp);
+				/* still no key?  advance to next line*/
+				continue;
+			    }
+			}
+
+			if (key_equal(found, key) &&
+				auth_parse_options(pw, options, file, linenum) == 1) {
+			    found_key = 1;
+			    debug("[LDAP] matching key found");
+			    fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
+			    verbose("[LDAP] Found matching %s key: %s", key_type(found), fp);
+
+			    /* restoring memory */
+			    ldap_keys_free(k);
+			    xfree(fp);
+			    restore_uid();
+			    key_free(found);
+			    return found_key;
+			    break;
+			}
+		    }/* end of LDAP for() */
+		} else {
+		    logit("[LDAP] no keys found for '%s'!", pw->pw_name);
+		}
+	    } else {
+		logit("[LDAP] '%s' is not in '%s'", pw->pw_name, options.lpk.sgroup);
+	    }
+	}
+#endif
 	debug("trying public key file %s", file);
 	f = auth_openkeyfile(file, pw, options.strict_modes);
 
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/auth-rsa.c openssh-5.1p1+lpk/auth-rsa.c
--- openssh-5.1p1.orig/auth-rsa.c	2008-07-02 05:37:30.000000000 -0700
+++ openssh-5.1p1+lpk/auth-rsa.c	2008-08-23 15:02:47.000000000 -0700
@@ -174,10 +174,96 @@
 	FILE *f;
 	u_long linenum = 0;
 	Key *key;
+#ifdef WITH_LDAP_PUBKEY
+	ldap_key_t * k;
+	unsigned int i = 0;
+#endif
 
 	/* Temporarily use the user's uid. */
 	temporarily_use_uid(pw);
 
+#ifdef WITH_LDAP_PUBKEY
+	/* here is the job */
+	key = key_new(KEY_RSA1);
+
+	if (options.lpk.on) {
+	    debug("[LDAP] trying LDAP first uid=%s", pw->pw_name);
+	    if ( ldap_ismember(&options.lpk, pw->pw_name) > 0) {
+		if ( (k = ldap_getuserkey(&options.lpk, pw->pw_name)) != NULL) {
+		    for (i = 0 ; i < k->num ; i++) {
+			char *cp, *options = NULL;
+
+			for (cp = k->keys[i]->bv_val; *cp == ' ' || *cp == '\t'; cp++)
+			    ;
+			if (!*cp || *cp == '\n' || *cp == '#')
+			    continue;
+
+			/*
+			* Check if there are options for this key, and if so,
+			* save their starting address and skip the option part
+			* for now.  If there are no options, set the starting
+			* address to NULL.
+			 */
+			if (*cp < '0' || *cp > '9') {
+			    int quoted = 0;
+			    options = cp;
+			    for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
+				if (*cp == '\\' && cp[1] == '"')
+				    cp++;	/* Skip both */
+				else if (*cp == '"')
+				    quoted = !quoted;
+			    }
+			} else
+			    options = NULL;
+
+			/* Parse the key from the line. */
+			if (hostfile_read_key(&cp, &bits, key) == 0) {
+			    debug("[LDAP] line %d: non ssh1 key syntax", i);
+			    continue;
+			}
+			/* cp now points to the comment part. */
+
+			/* Check if the we have found the desired key (identified by its modulus). */
+			if (BN_cmp(key->rsa->n, client_n) != 0)
+			    continue;
+
+			/* check the real bits  */
+			if (bits != (unsigned int)BN_num_bits(key->rsa->n))
+			    logit("[LDAP] Warning: ldap, line %lu: keysize mismatch: "
+				    "actual %d vs. announced %d.", (unsigned long)i, BN_num_bits(key->rsa->n), bits);
+
+			/* We have found the desired key. */
+			/*
+			* If our options do not allow this key to be used,
+			* do not send challenge.
+			 */
+			if (!auth_parse_options(pw, options, "[LDAP]", (unsigned long) i))
+			    continue;
+
+			/* break out, this key is allowed */
+			allowed = 1;
+
+			/* add the return stuff etc... */
+			/* Restore the privileged uid. */
+			restore_uid();
+
+			/* return key if allowed */
+			if (allowed && rkey != NULL)
+			    *rkey = key;
+			else
+			    key_free(key);
+
+			ldap_keys_free(k);
+			return (allowed);
+		    }
+		} else {
+		    logit("[LDAP] no keys found for '%s'!", pw->pw_name);
+		}
+	    } else {
+		logit("[LDAP] '%s' is not in '%s'", pw->pw_name, options.lpk.sgroup);
+	    }
+	}
+#endif
 	/* The authorized keys. */
 	file = authorized_keys_file(pw);
 	debug("trying public RSA key file %s", file);
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/config.h.in openssh-5.1p1+lpk/config.h.in
--- openssh-5.1p1.orig/config.h.in	2008-07-21 01:30:49.000000000 -0700
+++ openssh-5.1p1+lpk/config.h.in	2008-08-23 15:02:47.000000000 -0700
@@ -560,6 +560,9 @@
 /* Define to 1 if you have the <linux/if_tun.h> header file. */
 #undef HAVE_LINUX_IF_TUN_H
 
+/* Define if you want LDAP support */
+#undef WITH_LDAP_PUBKEY
+
 /* Define if your libraries define login() */
 #undef HAVE_LOGIN
 
--- openssh-5.7p1/configure.orig	2011-01-22 11:29:11.000000000 +0200
+++ openssh-5.7p1/configure	2011-01-24 16:33:06.271393457 +0200
@@ -1348,6 +1348,7 @@
   --with-tcp-wrappers[=PATH] Enable tcpwrappers support (optionally in PATH)
   --with-libedit[=PATH]   Enable libedit support for sftp
   --with-audit=module     Enable audit support (modules=debug,bsm,linux)
+  --with-ldap[=PATH]      Enable LDAP pubkey support (optionally in PATH)
   --with-ssl-dir=PATH     Specify path to OpenSSL installation
   --without-openssl-header-check Disable OpenSSL version consistency check
   --with-ssl-engine       Enable OpenSSL (hardware) ENGINE support
@@ -12198,6 +12199,85 @@
 fi
 
 
+# Check whether user wants LDAP support
+LDAP_MSG="no"
+
+# Check whether --with-ldap was given.
+if test "${with_ldap+set}" = set; then
+  withval=$with_ldap;
+		if test "x$withval" != "xno" ; then
+
+			if test "x$withval" != "xyes" ; then
+				CPPFLAGS="$CPPFLAGS -I${withval}/include"
+				LDFLAGS="$LDFLAGS -L${withval}/lib"
+			fi
+
+
+cat >>confdefs.h <<\_ACEOF
+#define WITH_LDAP_PUBKEY 1
+_ACEOF
+
+			LIBS="-lldap $LIBS"
+			LDAP_MSG="yes"
+
+			{ echo "$as_me:$LINENO: checking for LDAP support" >&5
+echo $ECHO_N "checking for LDAP support... $ECHO_C" >&6; }
+			cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/types.h>
+				 #include <ldap.h>
+int
+main ()
+{
+(void)ldap_init(0, 0);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+
+				    { echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+					{ { echo "$as_me:$LINENO: error: ** Incomplete or missing ldap libraries **" >&5
+echo "$as_me: error: ** Incomplete or missing ldap libraries **" >&2;}
+   { (exit 1); exit 1; }; }
+
+
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+		fi
+
+
+fi
+
+
 
 
 
@@ -31970,6 +32050,7 @@
 echo "                 Smartcard support: $SCARD_MSG"
 echo "                     S/KEY support: $SKEY_MSG"
 echo "              TCP Wrappers support: $TCPW_MSG"
+echo "                      LDAP support: $LDAP_MSG"
 echo "              MD5 password support: $MD5_MSG"
 echo "                   libedit support: $LIBEDIT_MSG"
 echo "  Solaris process contract support: $SPC_MSG"
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/configure.ac openssh-5.1p1+lpk/configure.ac
--- openssh-5.1p1.orig/configure.ac	2008-07-09 04:07:19.000000000 -0700
+++ openssh-5.1p1+lpk/configure.ac	2008-08-23 15:02:47.000000000 -0700
@@ -1299,6 +1299,37 @@
 	esac ]
 )
 
+# Check whether user wants LDAP support
+LDAP_MSG="no"
+AC_ARG_WITH(ldap,
+	[  --with-ldap[[=PATH]]      Enable LDAP pubkey support (optionally in PATH)],
+	[
+		if test "x$withval" != "xno" ; then
+
+			if test "x$withval" != "xyes" ; then
+				CPPFLAGS="$CPPFLAGS -I${withval}/include"
+				LDFLAGS="$LDFLAGS -L${withval}/lib"
+			fi
+
+			AC_DEFINE([WITH_LDAP_PUBKEY], 1, [Enable LDAP pubkey support])
+			LIBS="-lldap $LIBS"
+			LDAP_MSG="yes"
+	
+			AC_MSG_CHECKING([for LDAP support])
+			AC_TRY_COMPILE(
+				[#include <sys/types.h>
+				 #include <ldap.h>],
+				[(void)ldap_init(0, 0);],
+				[AC_MSG_RESULT(yes)],
+				[
+				    AC_MSG_RESULT(no) 
+					AC_MSG_ERROR([** Incomplete or missing ldap libraries **])
+				]
+        	)
+		fi
+	]
+)
+
 dnl    Checks for library functions. Please keep in alphabetical order
 AC_CHECK_FUNCS( \
 	arc4random \
@@ -4137,6 +4168,7 @@
 echo "                 Smartcard support: $SCARD_MSG"
 echo "                     S/KEY support: $SKEY_MSG"
 echo "              TCP Wrappers support: $TCPW_MSG"
+echo "                      LDAP support: $LDAP_MSG"
 echo "              MD5 password support: $MD5_MSG"
 echo "                   libedit support: $LIBEDIT_MSG"
 echo "  Solaris process contract support: $SPC_MSG"
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/ldapauth.c openssh-5.1p1+lpk/ldapauth.c
--- openssh-5.1p1.orig/ldapauth.c	1969-12-31 16:00:00.000000000 -0800
+++ openssh-5.1p1+lpk/ldapauth.c	2008-08-23 15:02:47.000000000 -0700
@@ -0,0 +1,575 @@
+/* 
+ * $Id$
+ */
+
+/*
+ *
+ * Copyright (c) 2005, Eric AUGE <eau@phear.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+ * 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.
+ * Neither the name of the phear.org nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 WITH_LDAP_PUBKEY
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "ldapauth.h"
+#include "log.h"
+
+static char *attrs[] = {
+    PUBKEYATTR,
+    NULL
+};
+
+/* filter building infos */
+#define FILTER_GROUP_PREFIX "(&(objectclass=posixGroup)"
+#define FILTER_OR_PREFIX "(|"
+#define FILTER_OR_SUFFIX ")"
+#define FILTER_CN_PREFIX "(cn="
+#define FILTER_CN_SUFFIX ")"
+#define FILTER_UID_FORMAT "(memberUid=%s)"
+#define FILTER_GROUP_SUFFIX ")"
+#define FILTER_GROUP_SIZE(group) (size_t) (strlen(group)+(ldap_count_group(group)*5)+52)
+
+/* just filter building stuff */
+#define REQUEST_GROUP_SIZE(filter, uid) (size_t) (strlen(filter)+strlen(uid)+1)
+#define REQUEST_GROUP(buffer, prefilter, pwname) \
+    buffer = (char *) calloc(REQUEST_GROUP_SIZE(prefilter, pwname), sizeof(char)); \
+    if (!buffer) { \
+        perror("calloc()"); \
+        return FAILURE; \
+    } \
+    snprintf(buffer, REQUEST_GROUP_SIZE(prefilter,pwname), prefilter, pwname)
+/*
+XXX OLD group building macros
+#define REQUEST_GROUP_SIZE(grp, uid) (size_t) (strlen(grp)+strlen(uid)+46)
+#define REQUEST_GROUP(buffer,pwname,grp) \
+    buffer = (char *) calloc(REQUEST_GROUP_SIZE(grp, pwname), sizeof(char)); \
+    if (!buffer) { \
+        perror("calloc()"); \
+        return FAILURE; \
+    } \
+    snprintf(buffer,REQUEST_GROUP_SIZE(grp,pwname),"(&(objectclass=posixGroup)(cn=%s)(memberUid=%s))",grp,pwname)
+    */
+
+/*
+XXX stock upstream version without extra filter support
+#define REQUEST_USER_SIZE(uid) (size_t) (strlen(uid)+64)
+#define REQUEST_USER(buffer, pwname) \
+    buffer = (char *) calloc(REQUEST_USER_SIZE(pwname), sizeof(char)); \
+    if (!buffer) { \
+        perror("calloc()"); \
+        return NULL; \
+    } \
+    snprintf(buffer,REQUEST_USER_SIZE(pwname),"(&(objectclass=posixAccount)(objectclass=ldapPublicKey)(uid=%s))",pwname)
+   */
+
+#define REQUEST_USER_SIZE(uid, filter) (size_t) (strlen(uid)+64+(filter != NULL ? strlen(filter) : 0))
+#define REQUEST_USER(buffer, pwname, customfilter) \
+    buffer = (char *) calloc(REQUEST_USER_SIZE(pwname, customfilter), sizeof(char)); \
+    if (!buffer) { \
+        perror("calloc()"); \
+        return NULL; \
+    } \
+    snprintf(buffer, REQUEST_USER_SIZE(pwname, customfilter), \
+    	"(&(objectclass=posixAccount)(objectclass=ldapPublicKey)(uid=%s)%s)", \
+	pwname, (customfilter != NULL ? customfilter : ""))
+
+/* some portable and working tokenizer, lame though */
+static int tokenize(char ** o, size_t size, char * input) {
+    unsigned int i = 0, num;
+    const char * charset = " \t";
+    char * ptr = input;
+
+    /* leading white spaces are ignored */
+    num = strspn(ptr, charset);
+    ptr += num;
+
+    while ((num = strcspn(ptr, charset))) {
+        if (i < size-1) {
+            o[i++] = ptr;
+            ptr += num;
+            if (*ptr)
+                *ptr++ = '\0';
+        }
+    }
+    o[i] = NULL;
+    return SUCCESS;
+}
+
+void ldap_close(ldap_opt_t * ldap) {
+
+    if (!ldap)
+        return;
+
+    if ( ldap_unbind_ext(ldap->ld, NULL, NULL) < 0)
+	ldap_perror(ldap->ld, "ldap_unbind()");
+
+    ldap->ld = NULL;
+    FLAG_SET_DISCONNECTED(ldap->flags);
+
+    return;
+}
+
+/* init && bind */
+int ldap_connect(ldap_opt_t * ldap) {
+    int version = LDAP_VERSION3;
+
+    if (!ldap->servers)
+        return FAILURE;
+
+    /* Connection Init and setup */
+    ldap->ld = ldap_init(ldap->servers, LDAP_PORT);
+    if (!ldap->ld) {
+        ldap_perror(ldap->ld, "ldap_init()");
+        return FAILURE;
+    }
+
+    if ( ldap_set_option(ldap->ld, LDAP_OPT_PROTOCOL_VERSION, &version) != LDAP_OPT_SUCCESS) {
+        ldap_perror(ldap->ld, "ldap_set_option(LDAP_OPT_PROTOCOL_VERSION)");
+        return FAILURE;
+    }
+
+    /* Timeouts setup */
+    if (ldap_set_option(ldap->ld, LDAP_OPT_NETWORK_TIMEOUT, &ldap->b_timeout) != LDAP_SUCCESS) {
+        ldap_perror(ldap->ld, "ldap_set_option(LDAP_OPT_NETWORK_TIMEOUT)");
+    }
+    if (ldap_set_option(ldap->ld, LDAP_OPT_TIMEOUT, &ldap->s_timeout) != LDAP_SUCCESS) {
+        ldap_perror(ldap->ld, "ldap_set_option(LDAP_OPT_TIMEOUT)");
+    }
+
+    /* TLS support */
+    if ( (ldap->tls == -1) || (ldap->tls == 1) ) {
+        if (ldap_start_tls_s(ldap->ld, NULL, NULL ) != LDAP_SUCCESS) {
+            /* failed then reinit the initial connect */
+            ldap_perror(ldap->ld, "ldap_connect: (TLS) ldap_start_tls()");
+            if (ldap->tls == 1)
+                return FAILURE;
+
+            ldap->ld = ldap_init(ldap->servers, LDAP_PORT);
+            if (!ldap->ld) { 
+                ldap_perror(ldap->ld, "ldap_init()");
+                return FAILURE;
+            }
+
+            if ( ldap_set_option(ldap->ld, LDAP_OPT_PROTOCOL_VERSION, &version) != LDAP_OPT_SUCCESS) {
+                 ldap_perror(ldap->ld, "ldap_set_option()");
+                 return FAILURE;
+            }
+        }
+    }
+
+
+    if ( ldap_simple_bind_s(ldap->ld, ldap->binddn, ldap->bindpw) != LDAP_SUCCESS) {
+        ldap_perror(ldap->ld, "ldap_simple_bind_s()");
+        return FAILURE;
+    }
+
+    /* says it is connected */
+    FLAG_SET_CONNECTED(ldap->flags);
+
+    return SUCCESS;
+}
+
+/* must free allocated ressource */
+static char * ldap_build_host(char *host, int port) {
+    unsigned int size = strlen(host)+11;
+    char * h = (char *) calloc (size, sizeof(char));
+    int rc;
+    if (!h)
+         return NULL;
+
+    rc = snprintf(h, size, "%s:%d ", host, port);
+    if (rc == -1)
+        return NULL;
+    return h;
+}
+
+static int ldap_count_group(const char * input) {
+    const char * charset = " \t";
+    const char * ptr = input;
+    unsigned int count = 0;
+    unsigned int num;
+
+    num = strspn(ptr, charset);
+    ptr += num;
+
+    while ((num = strcspn(ptr, charset))) {
+    count++;
+    ptr += num;
+    ptr++;
+    }
+
+    return count;
+}
+
+/* format filter */
+char * ldap_parse_groups(const char * groups) {
+    unsigned int buffer_size = FILTER_GROUP_SIZE(groups);
+    char * buffer = (char *) calloc(buffer_size, sizeof(char));
+    char * g = NULL;
+    char * garray[32];
+    unsigned int i = 0;
+
+    if ((!groups)||(!buffer))
+        return NULL;
+
+    g = strdup(groups);
+    if (!g) {
+        free(buffer);
+        return NULL;
+    }
+
+    /* first separate into n tokens */
+    if ( tokenize(garray, sizeof(garray)/sizeof(*garray), g) < 0) {
+        free(g);
+        free(buffer);
+        return NULL;
+    }
+
+    /* build the final filter format */
+    strlcat(buffer, FILTER_GROUP_PREFIX, buffer_size);
+    strlcat(buffer, FILTER_OR_PREFIX, buffer_size);
+    i = 0;
+    while (garray[i]) {
+        strlcat(buffer, FILTER_CN_PREFIX, buffer_size);
+        strlcat(buffer, garray[i], buffer_size);
+        strlcat(buffer, FILTER_CN_SUFFIX, buffer_size);
+        i++;
+    }
+    strlcat(buffer, FILTER_OR_SUFFIX, buffer_size);
+    strlcat(buffer, FILTER_UID_FORMAT, buffer_size);
+    strlcat(buffer, FILTER_GROUP_SUFFIX, buffer_size);
+
+    free(g);
+    return buffer;
+}
+
+/* a bit dirty but leak free  */
+char * ldap_parse_servers(const char * servers) {
+    char * s = NULL;
+    char * tmp = NULL, *urls[32];
+    unsigned int num = 0 , i = 0 , asize = 0;
+    LDAPURLDesc *urld[32];
+
+    if (!servers)
+        return NULL;
+
+    /* local copy of the arg */
+    s = strdup(servers);
+    if (!s)
+        return NULL;
+
+    /* first separate into URL tokens */
+    if ( tokenize(urls, sizeof(urls)/sizeof(*urls), s) < 0)
+        return NULL;
+
+    i = 0;
+    while (urls[i]) {
+        if (! ldap_is_ldap_url(urls[i]) ||
+           (ldap_url_parse(urls[i], &urld[i]) != 0)) {
+                return NULL;
+        }
+        i++;
+    }
+
+    /* now free(s) */
+    free (s);
+
+    /* how much memory do we need */
+    num = i;
+    for (i = 0 ; i < num ; i++)
+        asize += strlen(urld[i]->lud_host)+11;
+
+    /* alloc */
+    s = (char *) calloc( asize+1 , sizeof(char));
+    if (!s) {
+        for (i = 0 ; i < num ; i++)
+            ldap_free_urldesc(urld[i]);
+        return NULL;
+    }
+
+    /* then build the final host string */
+    for (i = 0 ; i < num ; i++) {
+        /* built host part */
+        tmp = ldap_build_host(urld[i]->lud_host, urld[i]->lud_port);
+        strncat(s, tmp, strlen(tmp));
+        ldap_free_urldesc(urld[i]);
+        free(tmp);
+    }
+
+    return s;
+}
+
+void ldap_options_print(ldap_opt_t * ldap) {
+    debug("ldap options:");
+    debug("servers: %s", ldap->servers);
+    if (ldap->u_basedn)
+        debug("user basedn: %s", ldap->u_basedn);
+    if (ldap->g_basedn)
+        debug("group basedn: %s", ldap->g_basedn);
+    if (ldap->binddn)
+        debug("binddn: %s", ldap->binddn);
+    if (ldap->bindpw)
+        debug("bindpw: %s", ldap->bindpw);
+    if (ldap->sgroup)
+        debug("group: %s", ldap->sgroup);
+    if (ldap->filter)
+        debug("filter: %s", ldap->filter);
+}
+
+void ldap_options_free(ldap_opt_t * l) {
+    if (!l)
+        return;
+    if (l->servers)
+        free(l->servers);
+    if (l->u_basedn)
+        free(l->u_basedn);
+    if (l->g_basedn)
+        free(l->g_basedn);
+    if (l->binddn)
+        free(l->binddn);
+    if (l->bindpw)
+        free(l->bindpw);
+    if (l->sgroup)
+        free(l->sgroup);
+    if (l->fgroup)
+        free(l->fgroup);
+    if (l->filter)
+        free(l->filter);
+    if (l->l_conf)
+        free(l->l_conf);
+    free(l);
+}
+
+/* free keys */
+void ldap_keys_free(ldap_key_t * k) {
+    ldap_value_free_len(k->keys);
+    free(k);
+    return;
+}
+
+ldap_key_t * ldap_getuserkey(ldap_opt_t *l, const char * user) {
+    ldap_key_t * k = (ldap_key_t *) calloc (1, sizeof(ldap_key_t));
+    LDAPMessage *res, *e;
+    char * filter;
+    int i;
+
+    if ((!k) || (!l))
+         return NULL;
+
+    /* Am i still connected ? RETRY n times */
+    /* XXX TODO: setup some conf value for retrying */
+    if (!(l->flags & FLAG_CONNECTED))
+        for (i = 0 ; i < 2 ; i++)
+            if (ldap_connect(l) == 0)
+                break;
+
+    /* quick check for attempts to be evil */
+    if ((strchr(user, '(') != NULL) || (strchr(user, ')') != NULL) ||
+        (strchr(user, '*') != NULL) || (strchr(user, '\\') != NULL))
+        return NULL;
+
+    /* build  filter for LDAP request */
+    REQUEST_USER(filter, user, l->filter);
+
+    if ( ldap_search_st( l->ld,
+        l->u_basedn,
+        LDAP_SCOPE_SUBTREE,
+        filter,
+        attrs, 0, &l->s_timeout, &res ) != LDAP_SUCCESS) {
+        
+        ldap_perror(l->ld, "ldap_search_st()");
+
+        free(filter);
+        free(k);
+
+        /* XXX error on search, timeout etc.. close ask for reconnect */
+        ldap_close(l);
+
+        return NULL;
+    } 
+
+    /* free */
+    free(filter);
+
+    /* check if any results */
+    i = ldap_count_entries(l->ld,res);
+    if (i <= 0) {
+        ldap_msgfree(res);
+        free(k);
+        return NULL;
+    }
+
+    if (i > 1)
+        debug("[LDAP] duplicate entries, using the FIRST entry returned");
+
+    e = ldap_first_entry(l->ld, res);
+    k->keys = ldap_get_values_len(l->ld, e, PUBKEYATTR);
+    k->num = ldap_count_values_len(k->keys);
+
+    ldap_msgfree(res);
+    return k;
+}
+
+
+/* -1 if trouble
+   0 if user is NOT member of current server group
+   1 if user IS MEMBER of current server group 
+ */
+int ldap_ismember(ldap_opt_t * l, const char * user) {
+    LDAPMessage *res;
+    char * filter;
+    int i;
+
+    if ((!l->sgroup) || !(l->g_basedn))
+        return 1;
+
+    /* Am i still connected ? RETRY n times */
+    /* XXX TODO: setup some conf value for retrying */
+    if (!(l->flags & FLAG_CONNECTED)) 
+        for (i = 0 ; i < 2 ; i++)
+            if (ldap_connect(l) == 0)
+                 break;
+
+    /* quick check for attempts to be evil */
+    if ((strchr(user, '(') != NULL) || (strchr(user, ')') != NULL) ||
+        (strchr(user, '*') != NULL) || (strchr(user, '\\') != NULL))
+        return FAILURE;
+
+    /* build filter for LDAP request */
+    REQUEST_GROUP(filter, l->fgroup, user);
+
+    if (ldap_search_st( l->ld, 
+        l->g_basedn,
+        LDAP_SCOPE_SUBTREE,
+        filter,
+        NULL, 0, &l->s_timeout, &res) != LDAP_SUCCESS) {
+    
+        ldap_perror(l->ld, "ldap_search_st()");
+
+        free(filter);
+
+        /* XXX error on search, timeout etc.. close ask for reconnect */
+        ldap_close(l);
+
+        return FAILURE;
+    }
+
+    free(filter);
+
+    /* check if any results */
+    if (ldap_count_entries(l->ld, res) > 0) {
+        ldap_msgfree(res);
+        return 1;
+    }
+
+    ldap_msgfree(res);
+    return 0;
+}
+
+/*
+ * ldap.conf simple parser
+ * XXX TODO:  sanity checks
+ * must either
+ * - free the previous ldap_opt_before replacing entries
+ * - free each necessary previously parsed elements
+ * ret:
+ * -1 on FAILURE, 0 on SUCCESS
+ */
+int ldap_parse_lconf(ldap_opt_t * l) {
+    FILE * lcd; /* ldap.conf descriptor */
+    char buf[BUFSIZ];
+    char * s = NULL, * k = NULL, * v = NULL;
+    int li, len;
+
+    lcd = fopen (l->l_conf, "r");
+    if (lcd == NULL) {
+        /* debug("Cannot open %s", l->l_conf); */
+        perror("ldap_parse_lconf()");
+        return FAILURE;
+    }
+    
+    while (fgets (buf, sizeof (buf), lcd) != NULL) {
+
+        if (*buf == '\n' || *buf == '#')
+            continue;
+
+        k = buf;
+        v = k;
+        while (*v != '\0' && *v != ' ' && *v != '\t')
+            v++;
+
+        if (*v == '\0')
+            continue;
+
+        *(v++) = '\0';
+
+        while (*v == ' ' || *v == '\t')
+            v++;
+
+        li = strlen (v) - 1;
+        while (v[li] == ' ' || v[li] == '\t' || v[li] == '\n')
+            --li;
+        v[li + 1] = '\0';
+
+        if (!strcasecmp (k, "uri")) {
+            if ((l->servers = ldap_parse_servers(v)) == NULL) {
+                fatal("error in ldap servers");
+            return FAILURE;
+            }
+
+        }
+        else if (!strcasecmp (k, "base")) { 
+            s = strchr (v, '?');
+            if (s != NULL) {
+                len = s - v;
+                l->u_basedn = malloc (len + 1);
+                strncpy (l->u_basedn, v, len);
+                l->u_basedn[len] = '\0';
+            } else {
+                l->u_basedn = strdup (v);
+            }
+        }
+        else if (!strcasecmp (k, "binddn")) {
+            l->binddn = strdup (v);
+        }
+        else if (!strcasecmp (k, "bindpw")) {
+            l->bindpw = strdup (v);
+        }
+        else if (!strcasecmp (k, "timelimit")) {
+            l->s_timeout.tv_sec = atoi (v);
+                }
+        else if (!strcasecmp (k, "bind_timelimit")) {
+            l->b_timeout.tv_sec = atoi (v);
+        }
+        else if (!strcasecmp (k, "ssl")) {
+            if (!strcasecmp (v, "start_tls"))
+                l->tls = 1;
+        }
+    }
+
+    fclose (lcd);
+    return SUCCESS;
+}
+
+#endif /* WITH_LDAP_PUBKEY */
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/ldapauth.h openssh-5.1p1+lpk/ldapauth.h
--- openssh-5.1p1.orig/ldapauth.h	1969-12-31 16:00:00.000000000 -0800
+++ openssh-5.1p1+lpk/ldapauth.h	2008-08-23 15:02:47.000000000 -0700
@@ -0,0 +1,124 @@
+/*
+ * $Id$ 
+ */
+
+/*
+ *
+ * Copyright (c) 2005, Eric AUGE <eau@phear.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+ * 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.
+ * Neither the name of the phear.org nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ *
+ */
+
+#ifndef LDAPAUTH_H
+#define LDAPAUTH_H
+
+#define LDAP_DEPRECATED 1
+
+#include <string.h>
+#include <time.h>
+#include <ldap.h>
+#include <lber.h>
+
+/* tokens in use for config */
+#define _DEFAULT_LPK_TOKEN "UseLPK"
+#define _DEFAULT_SRV_TOKEN "LpkServers"
+#define _DEFAULT_USR_TOKEN "LpkUserDN"
+#define _DEFAULT_GRP_TOKEN "LpkGroupDN"
+#define _DEFAULT_BDN_TOKEN "LpkBindDN"
+#define _DEFAULT_BPW_TOKEN "LpkBindPw"
+#define _DEFAULT_MYG_TOKEN "LpkServerGroup"
+#define _DEFAULT_FIL_TOKEN "LpkFilter"
+#define _DEFAULT_TLS_TOKEN "LpkForceTLS"
+#define _DEFAULT_BTI_TOKEN "LpkBindTimelimit"
+#define _DEFAULT_STI_TOKEN "LpkSearchTimelimit"
+#define _DEFAULT_LDP_TOKEN "LpkLdapConf"
+
+/* default options */
+#define _DEFAULT_LPK_ON 0
+#define _DEFAULT_LPK_SERVERS NULL
+#define _DEFAULT_LPK_UDN NULL
+#define _DEFAULT_LPK_GDN NULL
+#define _DEFAULT_LPK_BINDDN NULL
+#define _DEFAULT_LPK_BINDPW NULL
+#define _DEFAULT_LPK_SGROUP NULL
+#define _DEFAULT_LPK_FILTER NULL
+#define _DEFAULT_LPK_TLS -1
+#define _DEFAULT_LPK_BTIMEOUT 10
+#define _DEFAULT_LPK_STIMEOUT 10
+#define _DEFAULT_LPK_LDP NULL
+
+/* flags */
+#define FLAG_EMPTY	    0x00000000
+#define FLAG_CONNECTED	    0x00000001
+
+/* flag macros */
+#define FLAG_SET_EMPTY(x)		x&=(FLAG_EMPTY)
+#define FLAG_SET_CONNECTED(x)		x|=(FLAG_CONNECTED)
+#define FLAG_SET_DISCONNECTED(x)	x&=~(FLAG_CONNECTED)
+
+/* defines */
+#define FAILURE -1
+#define SUCCESS 0
+#define PUBKEYATTR "sshPublicKey"
+
+/* 
+ *
+ * defined files path 
+ * (should be relocated to pathnames.h,
+ * if one day it's included within the tree) 
+ *
+ */
+#define _PATH_LDAP_CONFIG_FILE "/etc/ldap.conf"
+
+/* structures */
+typedef struct ldap_options {
+    int on;			/* Use it or NOT */
+    LDAP * ld;			/* LDAP file desc */
+    char * servers;		/* parsed servers for ldaplib failover handling */
+    char * u_basedn;		/* user basedn */
+    char * g_basedn;		/* group basedn */
+    char * binddn;		/* binddn */
+    char * bindpw;		/* bind password */
+    char * sgroup;		/* server group */
+    char * fgroup;		/* group filter */
+    char * filter;		/* additional filter */
+    char * l_conf;		/* use ldap.conf */
+    int tls;			/* TLS only */
+    struct timeval b_timeout;   /* bind timeout */
+    struct timeval s_timeout;   /* search timeout */
+    unsigned int flags;		/* misc flags (reconnection, future use?) */
+} ldap_opt_t;
+
+typedef struct ldap_keys {
+    struct berval ** keys;	/* the public keys retrieved */
+    unsigned int num;		/* number of keys */
+} ldap_key_t;
+
+
+/* function headers */
+void ldap_close(ldap_opt_t *);
+int ldap_connect(ldap_opt_t *);
+char * ldap_parse_groups(const char *);
+char * ldap_parse_servers(const char *);
+void ldap_options_print(ldap_opt_t *);
+void ldap_options_free(ldap_opt_t *);
+void ldap_keys_free(ldap_key_t *);
+int ldap_parse_lconf(ldap_opt_t *);
+ldap_key_t * ldap_getuserkey(ldap_opt_t *, const char *);
+int ldap_ismember(ldap_opt_t *, const char *);
+
+#endif
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/lpk-user-example.txt openssh-5.1p1+lpk/lpk-user-example.txt
--- openssh-5.1p1.orig/lpk-user-example.txt	1969-12-31 16:00:00.000000000 -0800
+++ openssh-5.1p1+lpk/lpk-user-example.txt	2008-08-23 15:02:47.000000000 -0700
@@ -0,0 +1,117 @@
+
+Post to ML -> User Made Quick Install Doc.
+Contribution from John Lane <john@lane.uk.net>
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+OpenSSH LDAP keystore Patch
+===========================
+
+NOTE: these notes are a transcript of a specific installation
+      they work for me, your specifics may be different!
+      from John Lane March 17th 2005         john@lane.uk.net
+
+This is a patch to OpenSSH 4.0p1 to allow it to obtain users' public keys
+from their LDAP record as an alternative to ~/.ssh/authorized_keys.
+
+(Assuming here that necessary build stuff is in $BUILD)
+
+cd $BUILD/openssh-4.0p1
+patch -Np1 -i $BUILD/openssh-lpk-4.0p1-0.3.patch
+mkdir -p /var/empty &&
+./configure --prefix=/usr --sysconfdir=/etc/ssh \
+    --libexecdir=/usr/sbin --with-md5-passwords --with-pam \
+    --with-libs="-lldap" --with-cppflags="-DWITH_LDAP_PUBKEY"
+Now do.
+make &&
+make install
+
+Add the following config to /etc/ssh/ssh_config
+UseLPK yes
+LpkServers ldap://myhost.mydomain.com
+LpkUserDN  ou=People,dc=mydomain,dc=com
+
+We need to tell sshd about the SSL keys during boot, as root's
+environment does not exist at that time. Edit /etc/rc.d/init.d/sshd.
+Change the startup code from this:
+                echo "Starting SSH Server..."
+                loadproc /usr/sbin/sshd
+                ;;
+to this:
+                echo "Starting SSH Server..."
+                LDAPRC="/root/.ldaprc" loadproc /usr/sbin/sshd
+                ;;
+
+Re-start the sshd daemon:
+/etc/rc.d/init.d/sshd restart
+
+Install the additional LDAP schema
+cp $BUILD/openssh-lpk-0.2.schema  /etc/openldap/schema/openssh.schema
+
+Now add the openSSH LDAP schema to /etc/openldap/slapd.conf:
+Add the following to the end of the existing block of schema includes
+include         /etc/openldap/schema/openssh.schema
+
+Re-start the LDAP server:
+/etc/rc.d/init.d/slapd restart
+
+To add one or more public keys to a user, eg "testuser" :
+ldapsearch -x -W -Z -LLL -b "uid=testuser,ou=People,dc=mydomain,dc=com" -D
+"uid=testuser,ou=People,dc=mydomain,dc=com" > /tmp/testuser
+
+append the following to this /tmp/testuser file
+objectclass: ldapPublicKey
+sshPublicKey: ssh-rsa
+AAAAB3NzaC1yc2EAAAABJQAAAIB3dsrwqXqD7E4zYYrxwdDKBUQxKMioXy9pxFVai64kAPxjU9KS
+qIo7QfkjslfsjflksjfldfkjsldfjLX/5zkzRmT28I5piGzunPv17S89z8XwSsuAoR1t86t+5dlI
+7eZE/gVbn2UQkQq7+kdDTS2yXV6VnC52N/kKLG3ciBkBAw== General Purpose RSA Key
+
+Then do a modify:
+ldapmodify -x -D "uid=testuser,ou=People,dc=mydomain,dc=com" -W -f
+/tmp/testuser -Z
+Enter LDAP Password:
+modifying entry "uid=testuser,ou=People,dc=mydomain,dc=com"
+And check the modify is ok:
+ldapsearch -x -W -Z -b "uid=testuser,ou=People,dc=mydomain,dc=com" -D
+"uid=testuser,ou=People,dc=mydomain,dc=com"
+Enter LDAP Password:
+# extended LDIF
+#
+# LDAPv3
+# base <uid=testuser,ou=People,dc=mydomain,dc=com> with scope sub
+# filter: (objectclass=*)
+# requesting: ALL
+#
+
+# testuser, People, mydomain.com
+dn: uid=testuser,ou=People,dc=mydomain,dc=com
+uid: testuser
+cn: testuser
+objectClass: account
+objectClass: posixAccount
+objectClass: top
+objectClass: shadowAccount
+objectClass: ldapPublicKey
+shadowLastChange: 12757
+shadowMax: 99999
+shadowWarning: 7
+loginShell: /bin/bash
+uidNumber: 9999
+gidNumber: 501
+homeDirectory: /home/testuser
+userPassword:: e1NTSEF9UDgwV1hnM1VjUDRJK0k1YnFiL1d4ZUJObXlZZ3Z3UTU=
+sshPublicKey: ssh-rsa
+AAAAB3NzaC1yc2EAAAABJQAAAIB3dsrwqXqD7E4zYYrxwdDKBUQxKMioXy9pxFVai64kAPxjU9KSqIo7QfkjslfsjflksjfldfkjsldfjLX/5zkzRmT28I5piGzunPv17S89z
+8XwSsuAoR1t86t+5dlI7eZE/gVbn2UQkQq7+kdDTS2yXV6VnC52N/kKLG3ciBkBAw== General Purpose RSA Key
+
+# search result
+search: 3
+result: 0 Success
+
+# numResponses: 2
+# numEntries: 1
+
+Now start a ssh session to user "testuser" from usual ssh client (e.g.
+puTTY). Login should succeed.
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
--- openssh-5.7p1/Makefile.in.orig	2011-01-17 12:15:29.000000000 +0200
+++ openssh-5.7p1/Makefile.in	2011-01-24 16:35:51.174726790 +0200
@@ -93,7 +93,7 @@
 	auth2-gss.o gss-serv.o gss-serv-krb5.o \
 	loginrec.o auth-pam.o auth-shadow.o auth-sia.o md5crypt.o \
 	sftp-server.o sftp-common.o \
-	roaming_common.o roaming_serv.o
+	roaming_common.o roaming_serv.o ldapauth.o
 
 MANPAGES	= moduli.5.out 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 ssh-rand-helper.8.out ssh-keysign.8.out ssh-pkcs11-helper.8.out sshd_config.5.out ssh_config.5.out
 MANPAGES_IN	= moduli.5 scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh.1 sshd.8 sftp-server.8 sftp.1 ssh-rand-helper.8 ssh-keysign.8 ssh-pkcs11-helper.8 sshd_config.5 ssh_config.5
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/openssh-lpk_openldap.schema openssh-5.1p1+lpk/openssh-lpk_openldap.schema
--- openssh-5.1p1.orig/openssh-lpk_openldap.schema	1969-12-31 16:00:00.000000000 -0800
+++ openssh-5.1p1+lpk/openssh-lpk_openldap.schema	2008-08-23 15:02:47.000000000 -0700
@@ -0,0 +1,19 @@
+#
+# LDAP Public Key Patch schema for use with openssh-ldappubkey
+# Author: Eric AUGE <eau@phear.org>
+# 
+# Based on the proposal of : Mark Ruijter
+#
+
+
+# octetString SYNTAX
+attributetype ( 1.3.6.1.4.1.24552.500.1.1.1.13 NAME 'sshPublicKey' 
+	DESC 'MANDATORY: OpenSSH Public key' 
+	EQUALITY octetStringMatch
+	SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )
+
+# printableString SYNTAX yes|no
+objectclass ( 1.3.6.1.4.1.24552.500.1.1.2.0 NAME 'ldapPublicKey' SUP top AUXILIARY
+	DESC 'MANDATORY: OpenSSH LPK objectclass'
+	MUST ( sshPublicKey $ uid ) 
+	)
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/openssh-lpk_sun.schema openssh-5.1p1+lpk/openssh-lpk_sun.schema
--- openssh-5.1p1.orig/openssh-lpk_sun.schema	1969-12-31 16:00:00.000000000 -0800
+++ openssh-5.1p1+lpk/openssh-lpk_sun.schema	2008-08-23 15:02:47.000000000 -0700
@@ -0,0 +1,21 @@
+#
+# LDAP Public Key Patch schema for use with openssh-ldappubkey
+# Author: Eric AUGE <eau@phear.org>
+# 
+# Schema for Sun Directory Server.
+# Based on the original schema, modified by Stefan Fischer.
+#
+
+dn: cn=schema
+
+# octetString SYNTAX
+attributeTypes: ( 1.3.6.1.4.1.24552.500.1.1.1.13 NAME 'sshPublicKey' 
+	DESC 'MANDATORY: OpenSSH Public key' 
+	EQUALITY octetStringMatch
+	SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )
+
+# printableString SYNTAX yes|no
+objectClasses: ( 1.3.6.1.4.1.24552.500.1.1.2.0 NAME 'ldapPublicKey' SUP top AUXILIARY
+	DESC 'MANDATORY: OpenSSH LPK objectclass'
+	MUST ( sshPublicKey $ uid ) 
+	)
diff -Nuar --exclude '*.orig' --exclude '*.rej' openssh-5.1p1.orig/README.lpk openssh-5.1p1+lpk/README.lpk
--- openssh-5.1p1.orig/README.lpk	1969-12-31 16:00:00.000000000 -0800
+++ openssh-5.1p1+lpk/README.lpk	2008-08-23 15:02:47.000000000 -0700
@@ -0,0 +1,267 @@
+OpenSSH LDAP PUBLIC KEY PATCH 
+Copyright (c) 2003 Eric AUGE (eau@phear.org)
+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.
+3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+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.
+
+purposes of this patch:
+
+This patch would help to have authentication centralization policy
+using ssh public key authentication.
+This patch could be an alternative to other "secure" authentication system
+working in a similar way (Kerberos, SecurID, etc...), except the fact 
+that it's based on OpenSSH and its public key abilities.
+
+>> FYI: <<
+'uid': means unix accounts existing on the current server
+'lpkServerGroup:' mean server group configured on the current server ('lpkServerGroup' in sshd_config)
+
+example schema:
+
+
+                                  server1 (uid: eau,rival,toto) (lpkServerGroup: unix)
+                ___________      /
+               /           \ --- - server3 (uid: eau, titi) (lpkServerGroup: unix)
+              | LDAP Server |    \
+	      | eau  ,rival |     server2 (uid: rival, eau) (lpkServerGroup: unix)
+	      | titi ,toto  |
+	      | userx,....  |         server5 (uid: eau)  (lpkServerGroup: mail)
+               \___________/ \       /
+	                       ----- - server4 (uid: eau, rival)  (no group configured)
+			             \
+				        etc...
+
+- WHAT WE NEED :
+
+  * configured LDAP server somewhere on the network (i.e. OpenLDAP)
+  * patched sshd (with this patch ;)
+  * LDAP user(/group) entry (look at users.ldif (& groups.ldif)):
+        User entry:
+	- attached to the 'ldapPublicKey' objectclass
+	- attached to the 'posixAccount' objectclass
+	- with a filled 'sshPublicKey' attribute 
+	Example:
+		dn: uid=eau,ou=users,dc=cuckoos,dc=net
+		objectclass: top
+		objectclass: person
+		objectclass: organizationalPerson
+		objectclass: posixAccount
+		objectclass: ldapPublicKey
+		description: Eric AUGE Account
+		userPassword: blah
+		cn: Eric AUGE
+		sn: Eric AUGE
+		uid: eau
+		uidNumber: 1034
+		gidNumber: 1
+		homeDirectory: /export/home/eau
+		sshPublicKey: ssh-dss AAAAB3...
+		sshPublicKey: ssh-dss AAAAM5...
+
+	Group entry:
+	- attached to the 'posixGroup' objectclass
+	- with a 'cn' groupname attribute
+	- with multiple 'memberUid' attributes filled with usernames allowed in this group
+	Example:
+		# few members
+		dn: cn=unix,ou=groups,dc=cuckoos,dc=net
+		objectclass: top
+		objectclass: posixGroup
+		description: Unix based servers group
+		cn: unix
+		gidNumber: 1002
+		memberUid: eau
+		memberUid: user1
+		memberUid: user2
+
+
+- HOW IT WORKS :
+
+  * without patch
+  If a user wants to authenticate to log in a server the sshd, will first look for authentication method allowed (RSAauth,kerberos,etc..)
+  and if RSAauth and tickets based auth fails, it will fallback to standard password authentication (if enabled).
+
+  * with the patch
+  If a user want to authenticate to log in a server, the sshd will first look for auth method including LDAP pubkey, if the ldappubkey options is enabled.
+  It will do an ldapsearch to get the public key directly from the LDAP instead of reading it from the server filesystem. 
+  (usually in $HOME/.ssh/authorized_keys)
+
+  If groups are enabled, it will also check if the user that wants to login is in the group of the server he is trying to log into.
+  If it fails, it falls back on RSA auth files ($HOME/.ssh/authorized_keys), etc.. and finally to standard password authentication (if enabled).
+
+  7 tokens are added to sshd_config :
+  # here is the new patched ldap related tokens
+  # entries in your LDAP must be posixAccount & strongAuthenticationUser & posixGroup
+  UseLPK yes								# look the pub key into LDAP
+  LpkServers ldap://10.31.32.5/ ldap://10.31.32.4 ldap://10.31.32.3	# which LDAP server for users ? (URL format)
+  LpkUserDN  ou=users,dc=foobar,dc=net					# which base DN for users ?
+  LpkGroupDN ou=groups,dc=foobar,dc=net					# which base DN for groups ? 
+  LpkBindDN cn=manager,dc=foobar,dc=net					# which bind DN ?
+  LpkBindPw asecret							# bind DN credidentials
+  LpkServerGroup agroupname						# the group the server is part of
+