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dhcp/dhcp-ldapgssapi.patch
Jiri Popelka 18026f47c3 and the patch ;-)
2014-11-04 16:54:02 +01:00

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diff -up dhcp-4.3.1/configure.ac.ldapgssapi dhcp-4.3.1/configure.ac
--- dhcp-4.3.1/configure.ac.ldapgssapi 2014-11-04 16:08:35.017148053 +0100
+++ dhcp-4.3.1/configure.ac 2014-11-04 16:21:09.696504777 +0100
@@ -671,19 +671,40 @@ AC_ARG_WITH(ldapcrypto,
[ldapcrypto=$withval],
[ldapcrypto=no])
+# Gssapi to allow LDAP to authenticate with a keytab
+AC_ARG_WITH(krb5,
+ AC_HELP_STRING([--with-krb5],
+ [enable krb5/gssapi authentication for OpenLDAP in dhcpd (default is no)]),
+ [krb5=$withval],
+ [krb5=no])
+
# OpenLDAP support is disabled by default, if enabled then SSL support is an
# extra optional that is also disabled by default. Enabling LDAP SSL support
-# implies enabling LDAP support.
-if test x$ldap = xyes || test x$ldapcrypto = xyes ; then
+# implies enabling LDAP support. Similarly, KRB5 support implies LDAP support,
+# but doesn't include SSL. The two are not dependant.
+if test x$ldap = xyes || test x$ldapcrypto = xyes || test x$krb5 = xyes; then
AC_SEARCH_LIBS(ldap_initialize, [ldap], ,
AC_MSG_FAILURE([*** Cannot find ldap_initialize with -lldap - do you need to install an OpenLDAP2 Devel package?]))
AC_SEARCH_LIBS(ber_pvt_opt_on, [lber], ,
AC_MSG_FAILURE([*** Cannot find ber_pvt_opt_on with -llber - do you need to install an OpenLDAP2 Devel package?]))
-
+ if test x$krb5 = xyes ; then
+ AC_SEARCH_LIBS(krb5_init_context, [krb5], ,
+ AC_MSG_FAILURE([*** Cannot find krb5_init_context with -lkrb5 - do you need to install a Kerberos Devel package?]))
+ fi
+
+ # Can this be done better?
if test x$ldapcrypto = xyes ; then
- AC_SUBST(LDAP_CFLAGS, ["-DLDAP_CONFIGURATION -DLDAP_USE_SSL"])
+ if test x$krb5 = xyes; then
+ AC_SUBST(LDAP_CFLAGS, ["-DLDAP_CONFIGURATION -DLDAP_USE_SSL -DLDAP_USE_GSSAPI"])
+ else
+ AC_SUBST(LDAP_CFLAGS, ["-DLDAP_CONFIGURATION -DLDAP_USE_SSL"])
+ fi
else
- AC_SUBST(LDAP_CFLAGS, ["-DLDAP_CONFIGURATION"])
+ if test x$krb5 = xyes; then
+ AC_SUBST(LDAP_CFLAGS, ["-DLDAP_CONFIGURATION -DLDAP_USE_GSSAPI"])
+ else
+ AC_SUBST(LDAP_CFLAGS, ["-DLDAP_CONFIGURATION"])
+ fi
fi
fi
diff -up dhcp-4.3.1/includes/dhcpd.h.ldapgssapi dhcp-4.3.1/includes/dhcpd.h
--- dhcp-4.3.1/includes/dhcpd.h.ldapgssapi 2014-11-04 16:08:34.952148968 +0100
+++ dhcp-4.3.1/includes/dhcpd.h 2014-11-04 16:26:14.597202025 +0100
@@ -103,7 +103,14 @@ typedef time_t TIME;
#if defined(LDAP_CONFIGURATION)
# include <ldap.h>
# include <sys/utsname.h> /* for uname() */
-#endif
+# if defined(LDAP_USE_GSSAPI)
+# include <krb5.h>
+# include <string.h>
+# include <stdio.h>
+# include <time.h>
+# include <unistd.h>
+# endif /* GSSAPI */
+#endif /* LDAP CONFIGURATION */
#if !defined (BYTE_NAME_HASH_SIZE)
# define BYTE_NAME_HASH_SIZE 401 /* Default would be ridiculous. */
@@ -733,6 +740,13 @@ struct lease_state {
#define SV_LOG_THRESHOLD_LOW 83
#define SV_LOG_THRESHOLD_HIGH 84
+#if defined(LDAP_CONFIGURATION)
+#if defined (LDAP_USE_GSSAPI)
+# define SV_LDAP_GSSAPI_KEYTAB 85
+# define SV_LDAP_GSSAPI_PRINCIPAL 86
+#endif
+#endif
+
#if !defined (DEFAULT_PING_TIMEOUT)
# define DEFAULT_PING_TIMEOUT 1
#endif
diff -up dhcp-4.3.1/server/krb_helper.c.ldapgssapi dhcp-4.3.1/server/krb_helper.c
--- dhcp-4.3.1/server/krb_helper.c.ldapgssapi 2014-11-04 16:08:35.018148039 +0100
+++ dhcp-4.3.1/server/krb_helper.c 2014-11-04 16:08:35.018148039 +0100
@@ -0,0 +1,220 @@
+/* krb_helper.c
+
+ Helper routings for allowing LDAP to read configuration with GSSAPI/krb auth */
+
+/*
+ * Copyright (c) 2014 William B.
+ * 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. Neither the name of The Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
+ *
+ * This helper was written by William Brown <william@adelaide.edu.au>,
+ * inspired by krb5_helper.c from bind-dyndb-ldap by Simo Sorce (Redhat)
+ */
+
+#include "dhcpd.h"
+#include "krb_helper.h"
+
+#if defined(LDAP_USE_GSSAPI)
+
+//#include "ktinit.h"
+//#include <string.h>
+//#include <krb5.h>
+//#include <stdio.h>
+//#include <unistd.h>
+//#include <time.h>
+
+#define KRB_DEFAULT_KEYTAB "FILE:/etc/dhcp/dhcp.keytab"
+#define KRB_MIN_TIME 300
+
+#define CHECK_KRB5(ctx, err, msg, ...) \
+ do { \
+ if (err) { \
+ const char * errmsg = krb5_get_error_message(ctx, err); \
+ log_error("Err: %s -> %s\n", msg, errmsg); \
+ result = ISC_R_FAILURE; \
+ goto cleanup; \
+ } \
+ } while (0)
+
+#define CHECK(ret_code, msg) \
+ if (ret_code != 0) { \
+ log_error("Error, %i %s\n", ret_code, msg); \
+ goto cleanup; \
+ }
+
+static isc_result_t
+check_credentials(krb5_context context, krb5_ccache ccache, krb5_principal service)
+{
+ char *realm = NULL;
+ krb5_creds creds;
+ krb5_creds mcreds;
+ krb5_error_code krberr;
+ krb5_timestamp now;
+ isc_result_t result = ISC_R_FAILURE;
+
+ memset(&mcreds, 0, sizeof(mcreds));
+ memset(&creds, 0, sizeof(creds));
+
+ krberr = krb5_get_default_realm(context, &realm);
+ CHECK_KRB5(context, krberr, "Failed to retrieve default realm");
+
+ krberr = krb5_build_principal(context, &mcreds.server,
+ strlen(realm), realm,
+ "krbtgt", realm, NULL);
+ CHECK_KRB5(context, krberr, "Failed to build 'krbtgt/REALM' principal");
+
+ mcreds.client = service;
+
+ krberr = krb5_cc_retrieve_cred(context, ccache, 0, &mcreds, &creds);
+
+ if (krberr) {
+ const char * errmsg = krb5_get_error_message(context, krberr);
+ log_error("Credentials are not present in cache (%s)\n", errmsg);
+ krb5_free_error_message(context, errmsg);
+ result = ISC_R_FAILURE;
+ goto cleanup;
+ }
+ CHECK_KRB5(context, krberr, "Credentials are not present in cache ");
+
+ krberr = krb5_timeofday(context, &now);
+ CHECK_KRB5(context, krberr, "Failed to get time of day");
+
+
+ if (now > (creds.times.endtime + KRB_MIN_TIME)) {
+ log_error("Credentials cache expired");
+ result = ISC_R_FAILURE;
+ goto cleanup;
+ } else {
+ char buf[255];
+ char fill = ' ';
+ krb5_timestamp_to_sfstring(creds.times.endtime, buf, 16, &fill);
+ log_info("Credentials valid til %s\n", buf);
+ }
+
+ result = ISC_R_SUCCESS;
+
+cleanup:
+ krb5_free_cred_contents(context, &creds);
+ if (mcreds.server) krb5_free_principal(context, mcreds.server);
+ if (realm) krb5_free_default_realm(context, realm);
+ return result;
+}
+
+isc_result_t
+krb5_get_tgt(const char *principal, const char *keyfile)
+{
+ isc_result_t result = ISC_R_FAILURE;
+ char *ccname = NULL;
+ krb5_context context = NULL;
+ krb5_error_code krberr;
+ krb5_ccache ccache = NULL;
+ krb5_principal kprincpw = NULL;
+ krb5_creds my_creds;
+ krb5_creds * my_creds_ptr = NULL;
+ krb5_get_init_creds_opt options;
+ krb5_keytab keytab = NULL;
+ int ret;
+
+ if (keyfile == NULL || keyfile[0] == '\0') {
+ keyfile = KRB_DEFAULT_KEYTAB;
+ log_info("Using default keytab %s\n", keyfile);
+ } else {
+ if (strncmp(keyfile, "FILE:", 5) != 0) {
+ log_error("Unknown keytab path format: Does it start with FILE:?\n");
+ return ISC_R_FAILURE;
+ }
+ }
+
+ krberr = krb5_init_context(&context);
+ CHECK_KRB5(NULL, krberr, "Kerberos context initialization failed");
+
+ result = ISC_R_SUCCESS;
+
+ ccname = "MEMORY:dhcp_ld_krb5_cc";
+ log_info("Using ccache %s\n" , ccname);
+
+ ret = setenv("KRB5CCNAME", ccname, 1);
+ if (ret == -1) {
+ log_error("Failed to setup environment\n");
+ result = ISC_R_FAILURE;
+ goto cleanup;
+ }
+
+ krberr = krb5_cc_resolve(context, ccname, &ccache);
+ CHECK_KRB5(context, krberr, "Couldnt resolve ccache '%s'", ccname);
+
+ krberr = krb5_parse_name(context, principal, &kprincpw);
+ CHECK_KRB5(context, krberr, "Failed to parse princ '%s'", princpal);
+
+ result = check_credentials(context, ccache, kprincpw);
+ if (result == ISC_R_SUCCESS) {
+ log_info("Found valid kerberos credentials\n");
+ goto cleanup;
+ } else {
+ log_error("No valid krb5 credentials\n");
+ }
+
+ krberr = krb5_kt_resolve(context, keyfile, &keytab);
+ CHECK_KRB5(context, krberr,
+ "Failed to resolve kt files '%s'\n", keyfile);
+
+ memset(&my_creds, 0, sizeof(my_creds));
+ memset(&options, 0, sizeof(options));
+
+ krb5_get_init_creds_opt_set_tkt_life(&options, KRB_MIN_TIME * 2);
+ krb5_get_init_creds_opt_set_address_list(&options, NULL);
+ krb5_get_init_creds_opt_set_forwardable(&options, 0);
+ krb5_get_init_creds_opt_set_proxiable(&options, 0);
+
+ krberr = krb5_get_init_creds_keytab(context, &my_creds, kprincpw,
+ keytab, 0, NULL, &options);
+ CHECK_KRB5(context, krberr, "Failed to get initial credentials TGT\n");
+
+ my_creds_ptr = &my_creds;
+
+ krberr = krb5_cc_initialize(context, ccache, kprincpw);
+ CHECK_KRB5(context, krberr, "Failed to init ccache\n");
+
+ krberr = krb5_cc_store_cred(context, ccache, &my_creds);
+ CHECK_KRB5(context, krberr, "Failed to store credentials\n");
+
+ result = ISC_R_SUCCESS;
+ log_info("Successfully init krb tgt %s", principal);
+
+cleanup:
+ if (ccache) krb5_cc_close(context, ccache);
+ if (keytab) krb5_kt_close(context, keytab);
+ if (kprincpw) krb5_free_principal(context, kprincpw);
+ if (my_creds_ptr) krb5_free_cred_contents(context, &my_creds);
+ if (context) krb5_free_context(context);
+ return result;
+}
+
+#endif
+
diff -up dhcp-4.3.1/server/krb_helper.h.ldapgssapi dhcp-4.3.1/server/krb_helper.h
--- dhcp-4.3.1/server/krb_helper.h.ldapgssapi 2014-11-04 16:08:35.019148025 +0100
+++ dhcp-4.3.1/server/krb_helper.h 2014-11-04 16:08:35.018148039 +0100
@@ -0,0 +1,40 @@
+/* krb_helper.h
+
+ Helper routings for allowing LDAP to read configuration with GSSAPI/krb auth */
+
+/*
+ * Copyright (c) 2014 William B.
+ * 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. Neither the name of The Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
+ *
+ * This helper was written by William Brown <william@adelaide.edu.au>,
+ * inspired by krb5_helper.c from bind-dyndb-ldap by Simo Sorce (Redhat)
+ */
+
+isc_result_t krb5_get_tgt(const char *, const char *);
diff -up dhcp-4.3.1/server/ldap.c.ldapgssapi dhcp-4.3.1/server/ldap.c
--- dhcp-4.3.1/server/ldap.c.ldapgssapi 2014-11-04 16:08:34.989148447 +0100
+++ dhcp-4.3.1/server/ldap.c 2014-11-04 16:08:35.019148025 +0100
@@ -39,10 +39,16 @@
#include "dhcpd.h"
#include <signal.h>
-#include <errno.h>
+//#include <errno.h>
+#define LDAP_DEBUG 1
#if defined(LDAP_CONFIGURATION)
+#if defined(LDAP_USE_GSSAPI)
+#include <sasl/sasl.h>
+#include "krb_helper.h"
+#endif
+
#if defined(LDAP_CASA_AUTH)
#include "ldap_casa.h"
#endif
@@ -69,6 +75,20 @@ static char *ldap_tls_ca_file = NULL,
*ldap_tls_ciphers = NULL,
*ldap_tls_randfile = NULL;
#endif
+#if defined (LDAP_USE_GSSAPI)
+static char *ldap_gssapi_keytab = NULL,
+ *ldap_gssapi_principal = NULL;
+
+static struct ldap_sasl_instance {
+ char *sasl_mech;
+ char *sasl_realm;
+ char *sasl_authz_id;
+ char *sasl_authc_id;
+ char *sasl_password;
+};
+
+static struct ldap_sasl_instance *ldap_sasl_inst = NULL;
+#endif
static struct ldap_config_stack *ldap_stack = NULL;
typedef struct ldap_dn_node {
@@ -545,6 +565,62 @@ _do_lookup_dhcp_enum_option (struct opti
return (ret);
}
+#if defined(LDAP_USE_GSSAPI)
+static int
+_ldap_sasl_interact(LDAP *ld, unsigned flags, void *defaults, void *sin)
+{
+ sasl_interact_t *in;
+ struct ldap_sasl_instance *ldap_inst = defaults;
+ int ret = LDAP_OTHER;
+ size_t size;
+
+ if (ld == NULL || sin == NULL)
+ return LDAP_PARAM_ERROR;
+
+ log_info("doing interactive bind");
+ for (in = sin; in != NULL && in->id != SASL_CB_LIST_END; in++) {
+ switch (in->id) {
+ case SASL_CB_USER:
+ log_info("got request for SASL_CB_USER %s", ldap_inst->sasl_authz_id);
+ size = strlen(ldap_inst->sasl_authz_id);
+ in->result = ldap_inst->sasl_authz_id;
+ in->len = size;
+ ret = LDAP_SUCCESS;
+ break;
+ case SASL_CB_GETREALM:
+ log_info("got request for SASL_CB_GETREALM %s", ldap_inst->sasl_realm);
+ size = strlen(ldap_inst->sasl_realm);
+ in->result = ldap_inst->sasl_realm;
+ in->len = size;
+ ret = LDAP_SUCCESS;
+ break;
+ case SASL_CB_AUTHNAME:
+ log_info("got request for SASL_CB_AUTHNAME %s", ldap_inst->sasl_authc_id);
+ size = strlen(ldap_inst->sasl_authc_id);
+ in->result = ldap_inst->sasl_authc_id;
+ in->len = size;
+ ret = LDAP_SUCCESS;
+ break;
+ case SASL_CB_PASS:
+ log_info("got request for SASL_CB_PASS %s", ldap_inst->sasl_password);
+ size = strlen(ldap_inst->sasl_password);
+ in->result = ldap_inst->sasl_password;
+ in->len = size;
+ ret = LDAP_SUCCESS;
+ break;
+ default:
+ goto cleanup;
+ }
+ }
+ return ret;
+
+cleanup:
+ in->result = NULL;
+ in->len = 0;
+ return LDAP_OTHER;
+}
+#endif
+
int
ldap_rebind_cb (LDAP *ld, LDAP_CONST char *url, ber_tag_t request, ber_int_t msgid, void *parms)
{
@@ -595,20 +671,48 @@ ldap_rebind_cb (LDAP *ld, LDAP_CONST cha
}
#endif
-
- if (ldap_username != NULL || *ldap_username != '\0')
+ if (ldap_username != NULL && *ldap_username != '\0')
{
- who = ldap_username;
+#if defined(LDAP_USE_GSSAPI)
+ if (ldap_gssapi_principal != NULL) {
+ log_error("Cannot use gssapi and username / password simultaneously");
+ ldap_stop();
+ return;
+ }
+#endif
creds.bv_val = strdup(ldap_password);
creds.bv_len = strlen(ldap_password);
- }
- if ((ret = ldap_sasl_bind_s (ld, who, LDAP_SASL_SIMPLE, &creds,
- NULL, NULL, NULL)) != LDAP_SUCCESS)
- {
- log_error ("Error: Cannot login into ldap server %s:%d: %s",
- ldapurl->lud_host, ldapurl->lud_port, ldap_err2string (ret));
+ if ((ret = ldap_sasl_bind_s (ld, ldap_username, LDAP_SASL_SIMPLE,
+ &creds, NULL, NULL, NULL)) != LDAP_SUCCESS)
+ {
+ log_error ("Error: Cannot login into ldap server %s:%d: %s",
+ ldap_server, ldap_port, ldap_err2string (ret));
+ ldap_stop();
+ return ret;
+ }
+#if defined(LDAP_USE_GSSAPI)
+ } else {
+ if (ldap_gssapi_principal != NULL) {
+ krb5_get_tgt(ldap_gssapi_principal, ldap_gssapi_keytab);
+ if ((ret = ldap_sasl_interactive_bind_s(ld, NULL, ldap_sasl_inst->sasl_mech,
+ NULL, NULL, LDAP_SASL_AUTOMATIC,
+ _ldap_sasl_interact, ldap_sasl_inst)
+ ) != LDAP_SUCCESS)
+ {
+ log_error ("Error: Cannot SASL bind to ldap server %s:%d: %s",
+ ldap_server, ldap_port, ldap_err2string (ret));
+ char *msg=NULL;
+ ldap_get_option( ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, (void*)&msg);
+ log_error ("\tAdditional info: %s", msg);
+ ldap_memfree(msg);
+ ldap_stop();
+ return ret;
+ }
+ }
+#endif
}
+
return ret;
}
@@ -618,6 +722,12 @@ ldap_start (void)
struct option_state *options;
int ret, version;
char *uri = NULL;
+#if defined(LDAP_USE_GSSAPI)
+ char *gssapi_realm = NULL;
+ char *gssapi_user = NULL;
+ char *running = NULL;
+ const char *gssapi_delim = "@";
+#endif
struct berval creds;
if (ld != NULL)
@@ -656,6 +766,26 @@ ldap_start (void)
ldap_tls_randfile = _do_lookup_dhcp_string_option (options, SV_LDAP_TLS_RANDFILE);
}
#endif
+#if defined (LDAP_USE_GSSAPI)
+ ldap_gssapi_keytab = _do_lookup_dhcp_string_option (options, SV_LDAP_GSSAPI_KEYTAB);
+ ldap_gssapi_principal = _do_lookup_dhcp_string_option (options, SV_LDAP_GSSAPI_PRINCIPAL);
+
+ running = strdup(ldap_gssapi_principal);
+ gssapi_user = strtok(running, gssapi_delim);
+ gssapi_realm = strtok(NULL, gssapi_delim);
+ ldap_sasl_inst = malloc(sizeof(struct ldap_sasl_instance));
+ if (ldap_sasl_inst == NULL) {
+ log_error("Could not allocate memory for sasl instance! Can not run!");
+ ldap_stop();
+ return;
+ }
+ ldap_sasl_inst->sasl_mech = ber_strdup("GSSAPI");
+ ldap_sasl_inst->sasl_realm = ber_strdup(gssapi_realm);
+ ldap_sasl_inst->sasl_authz_id = ber_strdup(gssapi_user);
+ ldap_sasl_inst->sasl_authc_id = NULL;
+ ldap_sasl_inst->sasl_password = NULL; //"" before
+ free(running);
+#endif
#if defined (LDAP_CASA_AUTH)
if (!load_uname_pwd_from_miCASA(&ldap_username,&ldap_password))
@@ -870,6 +1000,13 @@ ldap_start (void)
if (ldap_username != NULL && *ldap_username != '\0')
{
+#if defined(LDAP_USE_GSSAPI)
+ if (ldap_gssapi_principal != NULL) {
+ log_error("Cannot use gssapi and username / password simultaneously");
+ ldap_stop();
+ return;
+ }
+#endif
creds.bv_val = strdup(ldap_password);
creds.bv_len = strlen(ldap_password);
@@ -881,6 +1018,26 @@ ldap_start (void)
ldap_stop();
return;
}
+#if defined(LDAP_USE_GSSAPI)
+ } else {
+ if (ldap_gssapi_principal != NULL) {
+ krb5_get_tgt(ldap_gssapi_principal, ldap_gssapi_keytab);
+ if ((ret = ldap_sasl_interactive_bind_s(ld, NULL, ldap_sasl_inst->sasl_mech,
+ NULL, NULL, LDAP_SASL_AUTOMATIC,
+ _ldap_sasl_interact, ldap_sasl_inst)
+ ) != LDAP_SUCCESS)
+ {
+ log_error ("Error: Cannot SASL bind to ldap server %s:%d: %s",
+ ldap_server, ldap_port, ldap_err2string (ret));
+ char *msg=NULL;
+ ldap_get_option( ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, (void*)&msg);
+ log_error ("\tAdditional info: %s", msg);
+ ldap_memfree(msg);
+ ldap_stop();
+ return;
+ }
+ }
+#endif
}
#if defined (DEBUG_LDAP)
diff -up dhcp-4.3.1/server/Makefile.am.ldapgssapi dhcp-4.3.1/server/Makefile.am
--- dhcp-4.3.1/server/Makefile.am.ldapgssapi 2014-11-04 16:08:35.019148025 +0100
+++ dhcp-4.3.1/server/Makefile.am 2014-11-04 16:37:24.616639706 +0100
@@ -10,7 +10,7 @@ dist_sysconf_DATA = dhcpd.conf.example
sbin_PROGRAMS = dhcpd
dhcpd_SOURCES = dhcpd.c dhcp.c bootp.c confpars.c db.c class.c failover.c \
omapi.c mdb.c stables.c salloc.c ddns.c dhcpleasequery.c \
- dhcpv6.c mdb6.c ldap.c ldap_casa.c probes.d trace.h
+ dhcpv6.c mdb6.c ldap.c ldap_casa.c krb_helper.c probes.d trace.h
dhcpd_CFLAGS = $(LDAP_CFLAGS)
dhcpd_LDADD = ../common/libdhcp.a ../omapip/libomapi.la ../dhcpctl/libdhcpctl.la \
diff -up dhcp-4.3.1/server/stables.c.ldapgssapi dhcp-4.3.1/server/stables.c
--- dhcp-4.3.1/server/stables.c.ldapgssapi 2014-11-04 16:08:35.020148010 +0100
+++ dhcp-4.3.1/server/stables.c 2014-11-04 16:42:09.109552243 +0100
@@ -259,6 +259,10 @@ static struct option server_options[] =
{ "ldap-tls-ciphers", "t", &server_universe, 76, 1 },
{ "ldap-tls-randfile", "t", &server_universe, 77, 1 },
#endif /* LDAP_USE_SSL */
+#if defined(LDAP_USE_GSSAPI)
+ { "ldap-gssapi-keytab", "t", &server_universe, 78, 1},
+ { "ldap-gssapi-principal", "t", &server_universe, 79, 1},
+#endif /* LDAP_USE_GSSAPI */
#endif /* LDAP_CONFIGURATION */
{ "dhcp-cache-threshold", "B", &server_universe, 78, 1 },
{ "dont-use-fsync", "f", &server_universe, 79, 1 },
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