Module Name: src
Committed By: christos
Date: Sat Aug 14 16:15:46 UTC 2021
Added Files:
src/external/bsd/openldap/dist/libraries/libldap: gssapi.c
Log Message:
Put back gssapi.c
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.4 \
src/external/bsd/openldap/dist/libraries/libldap/gssapi.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/external/bsd/openldap/dist/libraries/libldap/gssapi.c
diff -u /dev/null src/external/bsd/openldap/dist/libraries/libldap/gssapi.c:1.4
--- /dev/null Sat Aug 14 12:15:46 2021
+++ src/external/bsd/openldap/dist/libraries/libldap/gssapi.c Sat Aug 14 12:15:46 2021
@@ -0,0 +1,1015 @@
+/* $NetBSD: gssapi.c,v 1.4 2021/08/14 16:15:46 christos Exp $ */
+
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2020 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Author: Stefan Metzmacher <me...@sernet.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: gssapi.c,v 1.4 2021/08/14 16:15:46 christos Exp $");
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/socket.h>
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/time.h>
+#include <ac/errno.h>
+#include <ac/ctype.h>
+#include <ac/unistd.h>
+
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#include "ldap-int.h"
+
+#ifdef HAVE_GSSAPI
+
+#ifdef HAVE_GSSAPI_GSSAPI_H
+#include <gssapi/gssapi.h>
+#else
+#include <gssapi.h>
+#endif
+
+static char *
+gsserrstr(
+ char *buf,
+ ber_len_t buf_len,
+ gss_OID mech,
+ int gss_rc,
+ OM_uint32 minor_status )
+{
+ OM_uint32 min2;
+ gss_buffer_desc mech_msg = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc gss_msg = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc minor_msg = GSS_C_EMPTY_BUFFER;
+ OM_uint32 msg_ctx = 0;
+
+ if (buf == NULL) {
+ return NULL;
+ }
+
+ if (buf_len == 0) {
+ return NULL;
+ }
+
+#ifdef HAVE_GSS_OID_TO_STR
+ gss_oid_to_str(&min2, mech, &mech_msg);
+#endif
+ gss_display_status(&min2, gss_rc, GSS_C_GSS_CODE,
+ mech, &msg_ctx, &gss_msg);
+ gss_display_status(&min2, minor_status, GSS_C_MECH_CODE,
+ mech, &msg_ctx, &minor_msg);
+
+ snprintf(buf, buf_len, "gss_rc[%d:%*s] mech[%*s] minor[%u:%*s]",
+ gss_rc, (int)gss_msg.length,
+ (const char *)(gss_msg.value?gss_msg.value:""),
+ (int)mech_msg.length,
+ (const char *)(mech_msg.value?mech_msg.value:""),
+ minor_status, (int)minor_msg.length,
+ (const char *)(minor_msg.value?minor_msg.value:""));
+
+ gss_release_buffer(&min2, &mech_msg);
+ gss_release_buffer(&min2, &gss_msg);
+ gss_release_buffer(&min2, &minor_msg);
+
+ buf[buf_len-1] = '\0';
+
+ return buf;
+}
+
+static void
+sb_sasl_gssapi_init(
+ struct sb_sasl_generic_data *p,
+ ber_len_t *min_send,
+ ber_len_t *max_send,
+ ber_len_t *max_recv )
+{
+ gss_ctx_id_t gss_ctx = (gss_ctx_id_t)p->ops_private;
+ int gss_rc;
+ OM_uint32 minor_status;
+ gss_OID ctx_mech = GSS_C_NO_OID;
+ OM_uint32 ctx_flags = 0;
+ int conf_req_flag = 0;
+ OM_uint32 max_input_size;
+
+ gss_inquire_context(&minor_status,
+ gss_ctx,
+ NULL,
+ NULL,
+ NULL,
+ &ctx_mech,
+ &ctx_flags,
+ NULL,
+ NULL);
+
+ if (ctx_flags & (GSS_C_CONF_FLAG)) {
+ conf_req_flag = 1;
+ }
+
+#if defined(HAVE_CYRUS_SASL)
+#define SEND_PREALLOC_SIZE SASL_MIN_BUFF_SIZE
+#else
+#define SEND_PREALLOC_SIZE 4096
+#endif
+#define SEND_MAX_WIRE_SIZE 0x00A00000
+#define RECV_MAX_WIRE_SIZE 0x0FFFFFFF
+#define FALLBACK_SEND_MAX_SIZE 0x009FFFB8 /* from MIT 1.5.x */
+
+ gss_rc = gss_wrap_size_limit(&minor_status, gss_ctx,
+ conf_req_flag, GSS_C_QOP_DEFAULT,
+ SEND_MAX_WIRE_SIZE, &max_input_size);
+ if ( gss_rc != GSS_S_COMPLETE ) {
+ char msg[256];
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_init: failed to wrap size limit: %s\n",
+ gsserrstr( msg, sizeof(msg), ctx_mech, gss_rc, minor_status ) );
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_init: fallback to default wrap size limit\n");
+ /*
+ * some libgssglue/libgssapi versions
+ * have a broken gss_wrap_size_limit()
+ * implementation
+ */
+ max_input_size = FALLBACK_SEND_MAX_SIZE;
+ }
+
+ *min_send = SEND_PREALLOC_SIZE;
+ *max_send = max_input_size;
+ *max_recv = RECV_MAX_WIRE_SIZE;
+}
+
+static ber_int_t
+sb_sasl_gssapi_encode(
+ struct sb_sasl_generic_data *p,
+ unsigned char *buf,
+ ber_len_t len,
+ Sockbuf_Buf *dst )
+{
+ gss_ctx_id_t gss_ctx = (gss_ctx_id_t)p->ops_private;
+ int gss_rc;
+ OM_uint32 minor_status;
+ gss_buffer_desc unwrapped, wrapped;
+ gss_OID ctx_mech = GSS_C_NO_OID;
+ OM_uint32 ctx_flags = 0;
+ int conf_req_flag = 0;
+ int conf_state;
+ unsigned char *b;
+ ber_len_t pkt_len;
+
+ unwrapped.value = buf;
+ unwrapped.length = len;
+
+ gss_inquire_context(&minor_status,
+ gss_ctx,
+ NULL,
+ NULL,
+ NULL,
+ &ctx_mech,
+ &ctx_flags,
+ NULL,
+ NULL);
+
+ if (ctx_flags & (GSS_C_CONF_FLAG)) {
+ conf_req_flag = 1;
+ }
+
+ gss_rc = gss_wrap(&minor_status, gss_ctx,
+ conf_req_flag, GSS_C_QOP_DEFAULT,
+ &unwrapped, &conf_state,
+ &wrapped);
+ if ( gss_rc != GSS_S_COMPLETE ) {
+ char msg[256];
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_encode: failed to encode packet: %s\n",
+ gsserrstr( msg, sizeof(msg), ctx_mech, gss_rc, minor_status ) );
+ return -1;
+ }
+
+ if ( conf_req_flag && conf_state == 0 ) {
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_encode: GSS_C_CONF_FLAG was ignored by our gss_wrap()\n" );
+ return -1;
+ }
+
+ pkt_len = 4 + wrapped.length;
+
+ /* Grow the packet buffer if neccessary */
+ if ( dst->buf_size < pkt_len &&
+ ber_pvt_sb_grow_buffer( dst, pkt_len ) < 0 )
+ {
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_encode: failed to grow the buffer to %lu bytes\n",
+ pkt_len );
+ return -1;
+ }
+
+ dst->buf_end = pkt_len;
+
+ b = (unsigned char *)dst->buf_base;
+
+ b[0] = (unsigned char)(wrapped.length >> 24);
+ b[1] = (unsigned char)(wrapped.length >> 16);
+ b[2] = (unsigned char)(wrapped.length >> 8);
+ b[3] = (unsigned char)(wrapped.length >> 0);
+
+ /* copy the wrapped blob to the right location */
+ memcpy(b + 4, wrapped.value, wrapped.length);
+
+ gss_release_buffer(&minor_status, &wrapped);
+
+ return 0;
+}
+
+static ber_int_t
+sb_sasl_gssapi_decode(
+ struct sb_sasl_generic_data *p,
+ const Sockbuf_Buf *src,
+ Sockbuf_Buf *dst )
+{
+ gss_ctx_id_t gss_ctx = (gss_ctx_id_t)p->ops_private;
+ int gss_rc;
+ OM_uint32 minor_status;
+ gss_buffer_desc unwrapped, wrapped;
+ gss_OID ctx_mech = GSS_C_NO_OID;
+ OM_uint32 ctx_flags = 0;
+ int conf_req_flag = 0;
+ int conf_state;
+ unsigned char *b;
+
+ wrapped.value = src->buf_base + 4;
+ wrapped.length = src->buf_end - 4;
+
+ gss_inquire_context(&minor_status,
+ gss_ctx,
+ NULL,
+ NULL,
+ NULL,
+ &ctx_mech,
+ &ctx_flags,
+ NULL,
+ NULL);
+
+ if (ctx_flags & (GSS_C_CONF_FLAG)) {
+ conf_req_flag = 1;
+ }
+
+ gss_rc = gss_unwrap(&minor_status, gss_ctx,
+ &wrapped, &unwrapped,
+ &conf_state, GSS_C_QOP_DEFAULT);
+ if ( gss_rc != GSS_S_COMPLETE ) {
+ char msg[256];
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_decode: failed to decode packet: %s\n",
+ gsserrstr( msg, sizeof(msg), ctx_mech, gss_rc, minor_status ) );
+ return -1;
+ }
+
+ if ( conf_req_flag && conf_state == 0 ) {
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_encode: GSS_C_CONF_FLAG was ignored by our peer\n" );
+ return -1;
+ }
+
+ /* Grow the packet buffer if neccessary */
+ if ( dst->buf_size < unwrapped.length &&
+ ber_pvt_sb_grow_buffer( dst, unwrapped.length ) < 0 )
+ {
+ ber_log_printf( LDAP_DEBUG_ANY, p->sbiod->sbiod_sb->sb_debug,
+ "sb_sasl_gssapi_decode: failed to grow the buffer to %lu bytes\n",
+ unwrapped.length );
+ return -1;
+ }
+
+ dst->buf_end = unwrapped.length;
+
+ b = (unsigned char *)dst->buf_base;
+
+ /* copy the wrapped blob to the right location */
+ memcpy(b, unwrapped.value, unwrapped.length);
+
+ gss_release_buffer(&minor_status, &unwrapped);
+
+ return 0;
+}
+
+static void
+sb_sasl_gssapi_reset_buf(
+ struct sb_sasl_generic_data *p,
+ Sockbuf_Buf *buf )
+{
+ ber_pvt_sb_buf_destroy( buf );
+}
+
+static void
+sb_sasl_gssapi_fini( struct sb_sasl_generic_data *p )
+{
+}
+
+static const struct sb_sasl_generic_ops sb_sasl_gssapi_ops = {
+ sb_sasl_gssapi_init,
+ sb_sasl_gssapi_encode,
+ sb_sasl_gssapi_decode,
+ sb_sasl_gssapi_reset_buf,
+ sb_sasl_gssapi_fini
+};
+
+static int
+sb_sasl_gssapi_install(
+ Sockbuf *sb,
+ gss_ctx_id_t gss_ctx )
+{
+ struct sb_sasl_generic_install install_arg;
+
+ install_arg.ops = &sb_sasl_gssapi_ops;
+ install_arg.ops_private = gss_ctx;
+
+ return ldap_pvt_sasl_generic_install( sb, &install_arg );
+}
+
+static void
+sb_sasl_gssapi_remove( Sockbuf *sb )
+{
+ ldap_pvt_sasl_generic_remove( sb );
+}
+
+static int
+map_gsserr2ldap(
+ LDAP *ld,
+ gss_OID mech,
+ int gss_rc,
+ OM_uint32 minor_status )
+{
+ char msg[256];
+
+ Debug1( LDAP_DEBUG_ANY, "%s\n",
+ gsserrstr( msg, sizeof(msg), mech, gss_rc, minor_status ));
+
+ if (gss_rc == GSS_S_COMPLETE) {
+ ld->ld_errno = LDAP_SUCCESS;
+ } else if (GSS_CALLING_ERROR(gss_rc)) {
+ ld->ld_errno = LDAP_LOCAL_ERROR;
+ } else if (GSS_ROUTINE_ERROR(gss_rc)) {
+ ld->ld_errno = LDAP_INAPPROPRIATE_AUTH;
+ } else if (gss_rc == GSS_S_CONTINUE_NEEDED) {
+ ld->ld_errno = LDAP_SASL_BIND_IN_PROGRESS;
+ } else if (GSS_SUPPLEMENTARY_INFO(gss_rc)) {
+ ld->ld_errno = LDAP_AUTH_UNKNOWN;
+ } else if (GSS_ERROR(gss_rc)) {
+ ld->ld_errno = LDAP_AUTH_UNKNOWN;
+ } else {
+ ld->ld_errno = LDAP_OTHER;
+ }
+
+ return ld->ld_errno;
+}
+
+
+static int
+ldap_gssapi_get_rootdse_infos (
+ LDAP *ld,
+ char **pmechlist,
+ char **pldapServiceName,
+ char **pdnsHostName )
+{
+ /* we need to query the server for supported mechs anyway */
+ LDAPMessage *res, *e;
+ char *attrs[] = {
+ "supportedSASLMechanisms",
+ "ldapServiceName",
+ "dnsHostName",
+ NULL
+ };
+ char **values, *mechlist;
+ char *ldapServiceName = NULL;
+ char *dnsHostName = NULL;
+ int rc;
+
+ Debug0( LDAP_DEBUG_TRACE, "ldap_gssapi_get_rootdse_infos\n");
+
+ rc = ldap_search_s( ld, "", LDAP_SCOPE_BASE,
+ NULL, attrs, 0, &res );
+
+ if ( rc != LDAP_SUCCESS ) {
+ return ld->ld_errno;
+ }
+
+ e = ldap_first_entry( ld, res );
+ if ( e == NULL ) {
+ ldap_msgfree( res );
+ if ( ld->ld_errno == LDAP_SUCCESS ) {
+ ld->ld_errno = LDAP_NO_SUCH_OBJECT;
+ }
+ return ld->ld_errno;
+ }
+
+ values = ldap_get_values( ld, e, "supportedSASLMechanisms" );
+ if ( values == NULL ) {
+ ldap_msgfree( res );
+ ld->ld_errno = LDAP_NO_SUCH_ATTRIBUTE;
+ return ld->ld_errno;
+ }
+
+ mechlist = ldap_charray2str( values, " " );
+ if ( mechlist == NULL ) {
+ LDAP_VFREE( values );
+ ldap_msgfree( res );
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+
+ LDAP_VFREE( values );
+
+ values = ldap_get_values( ld, e, "ldapServiceName" );
+ if ( values == NULL ) {
+ goto get_dns_host_name;
+ }
+
+ ldapServiceName = ldap_charray2str( values, " " );
+ if ( ldapServiceName == NULL ) {
+ LDAP_FREE( mechlist );
+ LDAP_VFREE( values );
+ ldap_msgfree( res );
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+ LDAP_VFREE( values );
+
+get_dns_host_name:
+
+ values = ldap_get_values( ld, e, "dnsHostName" );
+ if ( values == NULL ) {
+ goto done;
+ }
+
+ dnsHostName = ldap_charray2str( values, " " );
+ if ( dnsHostName == NULL ) {
+ LDAP_FREE( mechlist );
+ LDAP_FREE( ldapServiceName );
+ LDAP_VFREE( values );
+ ldap_msgfree( res );
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+ LDAP_VFREE( values );
+
+done:
+ ldap_msgfree( res );
+
+ *pmechlist = mechlist;
+ *pldapServiceName = ldapServiceName;
+ *pdnsHostName = dnsHostName;
+
+ return LDAP_SUCCESS;
+}
+
+
+static int check_for_gss_spnego_support( LDAP *ld, const char *mechs_str )
+{
+ int rc;
+ char **mechs_list = NULL;
+
+ mechs_list = ldap_str2charray( mechs_str, " " );
+ if ( mechs_list == NULL ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+
+ rc = ldap_charray_inlist( mechs_list, "GSS-SPNEGO" );
+ ldap_charray_free( mechs_list );
+ if ( rc != 1) {
+ ld->ld_errno = LDAP_STRONG_AUTH_NOT_SUPPORTED;
+ return ld->ld_errno;
+ }
+
+ return LDAP_SUCCESS;
+}
+
+static int
+guess_service_principal(
+ LDAP *ld,
+ const char *ldapServiceName,
+ const char *dnsHostName,
+ gss_name_t *principal )
+{
+ gss_buffer_desc input_name;
+ /* GSS_KRB5_NT_PRINCIPAL_NAME */
+ gss_OID_desc nt_principal =
+ {10, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x01"};
+ const char *host = ld->ld_defconn->lconn_server->lud_host;
+ OM_uint32 minor_status;
+ int gss_rc;
+ int ret;
+ size_t svc_principal_size;
+ char *svc_principal = NULL;
+ const char *principal_fmt = NULL;
+ const char *str = NULL;
+ const char *givenstr = NULL;
+ const char *ignore = "not_defined_in_RFC4178@please_ignore";
+ int allow_remote = 0;
+
+ if (ldapServiceName) {
+ givenstr = strchr(ldapServiceName, ':');
+ if (givenstr && givenstr[1]) {
+ givenstr++;
+ if (strcmp(givenstr, ignore) == 0) {
+ givenstr = NULL;
+ }
+ } else {
+ givenstr = NULL;
+ }
+ }
+
+ if ( ld->ld_options.ldo_gssapi_options & LDAP_GSSAPI_OPT_ALLOW_REMOTE_PRINCIPAL ) {
+ allow_remote = 1;
+ }
+
+ if (allow_remote && givenstr) {
+ principal_fmt = "%s";
+ svc_principal_size = strlen(givenstr) + 1;
+ str = givenstr;
+
+ } else if (allow_remote && dnsHostName) {
+ principal_fmt = "ldap/%s";
+ svc_principal_size = STRLENOF("ldap/") + strlen(dnsHostName) + 1;
+ str = dnsHostName;
+
+ } else {
+ principal_fmt = "ldap/%s";
+ svc_principal_size = STRLENOF("ldap/") + strlen(host) + 1;
+ str = host;
+ }
+
+ svc_principal = (char*) ldap_memalloc(svc_principal_size * sizeof(char));
+ if ( svc_principal == NULL ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+
+ ret = snprintf( svc_principal, svc_principal_size, principal_fmt, str );
+ if (ret < 0 || (size_t)ret >= svc_principal_size) {
+ ld->ld_errno = LDAP_LOCAL_ERROR;
+ return ld->ld_errno;
+ }
+
+ Debug2( LDAP_DEBUG_TRACE, "principal for host[%s]: '%s'\n",
+ host, svc_principal );
+
+ input_name.value = svc_principal;
+ input_name.length = (size_t)ret;
+
+ gss_rc = gss_import_name( &minor_status, &input_name, &nt_principal, principal );
+ ldap_memfree( svc_principal );
+ if ( gss_rc != GSS_S_COMPLETE ) {
+ return map_gsserr2ldap( ld, GSS_C_NO_OID, gss_rc, minor_status );
+ }
+
+ return LDAP_SUCCESS;
+}
+
+void ldap_int_gssapi_close( LDAP *ld, LDAPConn *lc )
+{
+ if ( lc && lc->lconn_gss_ctx ) {
+ OM_uint32 minor_status;
+ OM_uint32 ctx_flags = 0;
+ gss_ctx_id_t old_gss_ctx = GSS_C_NO_CONTEXT;
+ old_gss_ctx = (gss_ctx_id_t)lc->lconn_gss_ctx;
+
+ gss_inquire_context(&minor_status,
+ old_gss_ctx,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ &ctx_flags,
+ NULL,
+ NULL);
+
+ if (!( ld->ld_options.ldo_gssapi_options & LDAP_GSSAPI_OPT_DO_NOT_FREE_GSS_CONTEXT )) {
+ gss_delete_sec_context( &minor_status, &old_gss_ctx, GSS_C_NO_BUFFER );
+ }
+ lc->lconn_gss_ctx = GSS_C_NO_CONTEXT;
+
+ if (ctx_flags & (GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG)) {
+ /* remove wrapping layer */
+ sb_sasl_gssapi_remove( lc->lconn_sb );
+ }
+ }
+}
+
+static void
+ldap_int_gssapi_setup(
+ LDAP *ld,
+ LDAPConn *lc,
+ gss_ctx_id_t gss_ctx)
+{
+ OM_uint32 minor_status;
+ OM_uint32 ctx_flags = 0;
+
+ ldap_int_gssapi_close( ld, lc );
+
+ gss_inquire_context(&minor_status,
+ gss_ctx,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ &ctx_flags,
+ NULL,
+ NULL);
+
+ lc->lconn_gss_ctx = gss_ctx;
+
+ if (ctx_flags & (GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG)) {
+ /* setup wrapping layer */
+ sb_sasl_gssapi_install( lc->lconn_sb, gss_ctx );
+ }
+}
+
+#ifdef LDAP_R_COMPILE
+ldap_pvt_thread_mutex_t ldap_int_gssapi_mutex;
+#endif
+
+static int
+ldap_int_gss_spnego_bind_s( LDAP *ld )
+{
+ int rc;
+ int gss_rc;
+ OM_uint32 minor_status;
+ char *mechlist = NULL;
+ char *ldapServiceName = NULL;
+ char *dnsHostName = NULL;
+ gss_OID_set supported_mechs = GSS_C_NO_OID_SET;
+ int spnego_support = 0;
+#define __SPNEGO_OID_LENGTH 6
+#define __SPNEGO_OID "\053\006\001\005\005\002"
+ gss_OID_desc spnego_oid = {__SPNEGO_OID_LENGTH, __SPNEGO_OID};
+ gss_OID req_mech = GSS_C_NO_OID;
+ gss_OID ret_mech = GSS_C_NO_OID;
+ gss_ctx_id_t gss_ctx = GSS_C_NO_CONTEXT;
+ gss_name_t principal = GSS_C_NO_NAME;
+ OM_uint32 req_flags;
+ OM_uint32 ret_flags;
+ gss_buffer_desc input_token, output_token = GSS_C_EMPTY_BUFFER;
+ struct berval cred, *scred = NULL;
+
+ LDAP_MUTEX_LOCK( &ldap_int_gssapi_mutex );
+
+ /* get information from RootDSE entry */
+ rc = ldap_gssapi_get_rootdse_infos ( ld, &mechlist,
+ &ldapServiceName, &dnsHostName);
+ if ( rc != LDAP_SUCCESS ) {
+ return rc;
+ }
+
+ /* check that the server supports GSS-SPNEGO */
+ rc = check_for_gss_spnego_support( ld, mechlist );
+ if ( rc != LDAP_SUCCESS ) {
+ goto rc_error;
+ }
+
+ /* prepare new gss_ctx_id_t */
+ rc = guess_service_principal( ld, ldapServiceName, dnsHostName, &principal );
+ if ( rc != LDAP_SUCCESS ) {
+ goto rc_error;
+ }
+
+ /* see if our gssapi library supports spnego */
+ gss_rc = gss_indicate_mechs( &minor_status, &supported_mechs );
+ if ( gss_rc != GSS_S_COMPLETE ) {
+ goto gss_error;
+ }
+ gss_rc = gss_test_oid_set_member( &minor_status,
+ &spnego_oid, supported_mechs, &spnego_support);
+ gss_release_oid_set( &minor_status, &supported_mechs);
+ if ( gss_rc != GSS_S_COMPLETE ) {
+ goto gss_error;
+ }
+ if ( spnego_support != 0 ) {
+ req_mech = &spnego_oid;
+ }
+
+ req_flags = ld->ld_options.ldo_gssapi_flags;
+ req_flags |= GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG;
+
+ /*
+ * loop around gss_init_sec_context() and ldap_sasl_bind_s()
+ */
+ input_token.value = NULL;
+ input_token.length = 0;
+ gss_rc = gss_init_sec_context(&minor_status,
+ GSS_C_NO_CREDENTIAL,
+ &gss_ctx,
+ principal,
+ req_mech,
+ req_flags,
+ 0,
+ NULL,
+ &input_token,
+ &ret_mech,
+ &output_token,
+ &ret_flags,
+ NULL);
+ if ( gss_rc == GSS_S_COMPLETE ) {
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ goto rc_error;
+ }
+ if ( gss_rc != GSS_S_CONTINUE_NEEDED ) {
+ goto gss_error;
+ }
+ while (1) {
+ cred.bv_val = (char *)output_token.value;
+ cred.bv_len = output_token.length;
+ rc = ldap_sasl_bind_s( ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL, &scred );
+ gss_release_buffer( &minor_status, &output_token );
+ if ( rc != LDAP_SUCCESS && rc != LDAP_SASL_BIND_IN_PROGRESS ) {
+ goto rc_error;
+ }
+
+ if ( scred ) {
+ input_token.value = scred->bv_val;
+ input_token.length = scred->bv_len;
+ } else {
+ input_token.value = NULL;
+ input_token.length = 0;
+ }
+
+ gss_rc = gss_init_sec_context(&minor_status,
+ GSS_C_NO_CREDENTIAL,
+ &gss_ctx,
+ principal,
+ req_mech,
+ req_flags,
+ 0,
+ NULL,
+ &input_token,
+ &ret_mech,
+ &output_token,
+ &ret_flags,
+ NULL);
+ if ( scred ) {
+ ber_bvfree( scred );
+ }
+ if ( gss_rc == GSS_S_COMPLETE ) {
+ gss_release_buffer( &minor_status, &output_token );
+ break;
+ }
+
+ if ( gss_rc != GSS_S_CONTINUE_NEEDED ) {
+ goto gss_error;
+ }
+ }
+
+ ldap_int_gssapi_setup( ld, ld->ld_defconn, gss_ctx);
+ gss_ctx = GSS_C_NO_CONTEXT;
+
+ rc = LDAP_SUCCESS;
+ goto rc_error;
+
+gss_error:
+ rc = map_gsserr2ldap( ld,
+ (ret_mech != GSS_C_NO_OID ? ret_mech : req_mech ),
+ gss_rc, minor_status );
+rc_error:
+ LDAP_MUTEX_UNLOCK( &ldap_int_gssapi_mutex );
+ LDAP_FREE( mechlist );
+ LDAP_FREE( ldapServiceName );
+ LDAP_FREE( dnsHostName );
+ gss_release_buffer( &minor_status, &output_token );
+ if ( gss_ctx != GSS_C_NO_CONTEXT ) {
+ gss_delete_sec_context( &minor_status, &gss_ctx, GSS_C_NO_BUFFER );
+ }
+ if ( principal != GSS_C_NO_NAME ) {
+ gss_release_name( &minor_status, &principal );
+ }
+ return rc;
+}
+
+int
+ldap_int_gssapi_config( struct ldapoptions *lo, int option, const char *arg )
+{
+ int ok = 0;
+
+ switch( option ) {
+ case LDAP_OPT_SIGN:
+
+ if (!arg) {
+ } else if (strcasecmp(arg, "on") == 0) {
+ ok = 1;
+ } else if (strcasecmp(arg, "yes") == 0) {
+ ok = 1;
+ } else if (strcasecmp(arg, "true") == 0) {
+ ok = 1;
+
+ }
+ if (ok) {
+ lo->ldo_gssapi_flags |= GSS_C_INTEG_FLAG;
+ }
+
+ return 0;
+
+ case LDAP_OPT_ENCRYPT:
+
+ if (!arg) {
+ } else if (strcasecmp(arg, "on") == 0) {
+ ok = 1;
+ } else if (strcasecmp(arg, "yes") == 0) {
+ ok = 1;
+ } else if (strcasecmp(arg, "true") == 0) {
+ ok = 1;
+ }
+
+ if (ok) {
+ lo->ldo_gssapi_flags |= GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG;
+ }
+
+ return 0;
+
+ case LDAP_OPT_X_GSSAPI_ALLOW_REMOTE_PRINCIPAL:
+
+ if (!arg) {
+ } else if (strcasecmp(arg, "on") == 0) {
+ ok = 1;
+ } else if (strcasecmp(arg, "yes") == 0) {
+ ok = 1;
+ } else if (strcasecmp(arg, "true") == 0) {
+ ok = 1;
+ }
+
+ if (ok) {
+ lo->ldo_gssapi_options |= LDAP_GSSAPI_OPT_ALLOW_REMOTE_PRINCIPAL;
+ }
+
+ return 0;
+ }
+
+ return -1;
+}
+
+int
+ldap_int_gssapi_get_option( LDAP *ld, int option, void *arg )
+{
+ if ( ld == NULL )
+ return -1;
+
+ switch ( option ) {
+ case LDAP_OPT_SSPI_FLAGS:
+ * (unsigned *) arg = (unsigned) ld->ld_options.ldo_gssapi_flags;
+ break;
+
+ case LDAP_OPT_SIGN:
+ if ( ld->ld_options.ldo_gssapi_flags & GSS_C_INTEG_FLAG ) {
+ * (int *) arg = (int)-1;
+ } else {
+ * (int *) arg = (int)0;
+ }
+ break;
+
+ case LDAP_OPT_ENCRYPT:
+ if ( ld->ld_options.ldo_gssapi_flags & GSS_C_CONF_FLAG ) {
+ * (int *) arg = (int)-1;
+ } else {
+ * (int *) arg = (int)0;
+ }
+ break;
+
+ case LDAP_OPT_SASL_METHOD:
+ * (char **) arg = LDAP_STRDUP("GSS-SPNEGO");
+ break;
+
+ case LDAP_OPT_SECURITY_CONTEXT:
+ if ( ld->ld_defconn && ld->ld_defconn->lconn_gss_ctx ) {
+ * (gss_ctx_id_t *) arg = (gss_ctx_id_t)ld->ld_defconn->lconn_gss_ctx;
+ } else {
+ * (gss_ctx_id_t *) arg = GSS_C_NO_CONTEXT;
+ }
+ break;
+
+ case LDAP_OPT_X_GSSAPI_DO_NOT_FREE_CONTEXT:
+ if ( ld->ld_options.ldo_gssapi_options & LDAP_GSSAPI_OPT_DO_NOT_FREE_GSS_CONTEXT ) {
+ * (int *) arg = (int)-1;
+ } else {
+ * (int *) arg = (int)0;
+ }
+ break;
+
+ case LDAP_OPT_X_GSSAPI_ALLOW_REMOTE_PRINCIPAL:
+ if ( ld->ld_options.ldo_gssapi_options & LDAP_GSSAPI_OPT_ALLOW_REMOTE_PRINCIPAL ) {
+ * (int *) arg = (int)-1;
+ } else {
+ * (int *) arg = (int)0;
+ }
+ break;
+
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+ldap_int_gssapi_set_option( LDAP *ld, int option, void *arg )
+{
+ if ( ld == NULL )
+ return -1;
+
+ switch ( option ) {
+ case LDAP_OPT_SSPI_FLAGS:
+ if ( arg != LDAP_OPT_OFF ) {
+ ld->ld_options.ldo_gssapi_flags = * (unsigned *)arg;
+ }
+ break;
+
+ case LDAP_OPT_SIGN:
+ if ( arg != LDAP_OPT_OFF ) {
+ ld->ld_options.ldo_gssapi_flags |= GSS_C_INTEG_FLAG;
+ }
+ break;
+
+ case LDAP_OPT_ENCRYPT:
+ if ( arg != LDAP_OPT_OFF ) {
+ ld->ld_options.ldo_gssapi_flags |= GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG;
+ }
+ break;
+
+ case LDAP_OPT_SASL_METHOD:
+ if ( arg != LDAP_OPT_OFF ) {
+ const char *m = (const char *)arg;
+ if ( strcmp( "GSS-SPNEGO", m ) != 0 ) {
+ /* we currently only support GSS-SPNEGO */
+ return -1;
+ }
+ }
+ break;
+
+ case LDAP_OPT_SECURITY_CONTEXT:
+ if ( arg != LDAP_OPT_OFF && ld->ld_defconn) {
+ ldap_int_gssapi_setup( ld, ld->ld_defconn,
+ (gss_ctx_id_t) arg);
+ }
+ break;
+
+ case LDAP_OPT_X_GSSAPI_DO_NOT_FREE_CONTEXT:
+ if ( arg != LDAP_OPT_OFF ) {
+ ld->ld_options.ldo_gssapi_options |= LDAP_GSSAPI_OPT_DO_NOT_FREE_GSS_CONTEXT;
+ }
+ break;
+
+ case LDAP_OPT_X_GSSAPI_ALLOW_REMOTE_PRINCIPAL:
+ if ( arg != LDAP_OPT_OFF ) {
+ ld->ld_options.ldo_gssapi_options |= LDAP_GSSAPI_OPT_ALLOW_REMOTE_PRINCIPAL;
+ }
+ break;
+
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+#else /* HAVE_GSSAPI */
+#define ldap_int_gss_spnego_bind_s(ld) LDAP_NOT_SUPPORTED
+#endif /* HAVE_GSSAPI */
+
+int
+ldap_gssapi_bind(
+ LDAP *ld,
+ LDAP_CONST char *dn,
+ LDAP_CONST char *creds )
+{
+ return LDAP_NOT_SUPPORTED;
+}
+
+int
+ldap_gssapi_bind_s(
+ LDAP *ld,
+ LDAP_CONST char *dn,
+ LDAP_CONST char *creds )
+{
+ if ( dn != NULL ) {
+ return LDAP_NOT_SUPPORTED;
+ }
+
+ if ( creds != NULL ) {
+ return LDAP_NOT_SUPPORTED;
+ }
+
+ return ldap_int_gss_spnego_bind_s(ld);
+}
