Allow the ntp_signd socket to be set from configure.

This will allow distributions to hard-code this path, particularly for
selinux, and matches how we handle the winbind socket dir.

Andrew Bartlett
(This used to be commit c8b4416504)

source4/Makefile

@@ -167,6 +167,7 @@ showlayout::
 	@echo '  torturedir:  $(TORTUREDIR)'
 	@echo '  datadir:     $(datadir)'
 	@echo '  winbindd_socket_dir:  $(winbindd_socket_dir)'
+	@echo '  ntp_signd_socket_dir:  $(ntp_signd_socket_dir)'
 
 showflags::
 	@echo '  srcdir     = $(srcdir)'

source4/build/m4/check_path.m4

@@ -20,6 +20,7 @@ piddir="${localstatedir}/run"
 privatedir="\${prefix}/private"
 modulesdir="\${prefix}/modules"
 winbindd_socket_dir="${localstatedir}/run/winbind_pipe"
+ntp_signd_socket_dir="${localstatedir}/run/ntp_signd"
 
 AC_ARG_WITH(fhs, 
 [  --with-fhs              Use FHS-compliant paths (default=no)],
@@ -31,6 +32,7 @@ AC_ARG_WITH(fhs,
     modulesdir="${libdir}/samba"
     datadir="${datadir}/samba"
     includedir="${includedir}/samba-4.0"
+    ntp_signd_socket_dir="${localstatedir}/run/samba/ntp_signd"
     winbindd_socket_dir="${localstatedir}/run/samba/winbind_pipe"
 )
 
@@ -66,6 +68,22 @@ AC_ARG_WITH(winbindd-socket-dir,
     ;;
   esac])
 
+#################################################
+# set where the NTP signing deamon socket should be put
+AC_ARG_WITH(ntp-signd-socket-dir,
+[  --with-ntp-signd-socket-dir=DIR   Where to put the NTP signing deamon socket ($ac_default_prefix/run/ntp_signd)],
+[ case "$withval" in
+  yes|no)
+  #
+  # Just in case anybody calls it without argument
+  #
+    AC_MSG_WARN([--with-ntp-signd-socketdir called without argument - will use default])
+  ;;
+  * )
+    ntp_signd_socket_dir="$withval"
+    ;;
+  esac])
+
 #################################################
 # set lock directory location
 AC_ARG_WITH(lockdir,
@@ -122,6 +140,7 @@ AC_SUBST(privatedir)
 AC_SUBST(bindir)
 AC_SUBST(sbindir)
 AC_SUBST(winbindd_socket_dir)
+AC_SUBST(ntp_signd_socket_dir)
 AC_SUBST(modulesdir)
 
 #################################################

source4/dynconfig/config.mk

@@ -19,5 +19,6 @@ $(dynconfigsrcdir)/dynconfig.o: CFLAGS+=-DCONFIGFILE=\"$(CONFIGFILE)\" -DBINDIR=
 	 -DPRIVATE_DIR=\"$(privatedir)\" \
 	 -DMODULESDIR=\"$(modulesdir)\" -DJSDIR=\"$(JSDIR)\" \
 	 -DTORTUREDIR=\"$(TORTUREDIR)\" \
-	 -DSETUPDIR=\"$(SETUPDIR)\" -DWINBINDD_SOCKET_DIR=\"$(winbindd_socket_dir)\"
+	 -DSETUPDIR=\"$(SETUPDIR)\" -DWINBINDD_SOCKET_DIR=\"$(winbindd_socket_dir)\" \
+	 -DNTP_SIGND_SOCKET_DIR=\"$(ntp_signd_socket_dir)\"
 

source4/dynconfig/dynconfig.c

@@ -84,3 +84,6 @@ _PUBLIC_ const char *dyn_JSDIR = JSDIR;
 
 /** Where to find the winbindd socket */
 _PUBLIC_ const char *dyn_WINBINDD_SOCKET_DIR = WINBINDD_SOCKET_DIR;
+
+/** Where to find the NTP signing deamon socket */
+_PUBLIC_ const char *dyn_NTP_SIGND_SOCKET_DIR = NTP_SIGND_SOCKET_DIR;

source4/dynconfig/dynconfig.h

@@ -38,3 +38,4 @@ extern const char *dyn_SWATDIR;
 extern const char *dyn_JSDIR;
 extern const char *dyn_SETUPDIR;
 extern const char *dyn_WINBINDD_SOCKET_DIR;
+extern const char *dyn_NTP_SIGND_SOCKET_DIR;

source4/ntp_signd/ntp_signd.c

@@ -35,6 +35,7 @@
 #include "lib/ldb/include/ldb.h"
 #include "lib/ldb/include/ldb_errors.h"
 #include "lib/crypto/md5.h"
+#include "system/passwd.h"
 
 /*
   top level context structure for the ntp_signd server
@@ -144,6 +145,8 @@ static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB wrapped_input)
 		return ndr_map_error2ntstatus(ndr_err);
 	}
 
+	/* We need to implement 'check signature' and 'request server
+	 * to sign' operations at some point */
 	if (sign_request.op != SIGN_TO_CLIENT) {
 		talloc_free(tmp_ctx);
 		return signing_failure(ntp_signdconn, sign_request.packet_id);
@@ -155,13 +158,13 @@ static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB wrapped_input)
 		return signing_failure(ntp_signdconn, sign_request.packet_id);
 	}
 	
+	/* The top bit is a 'key selector' */
 	sid = dom_sid_add_rid(tmp_ctx, domain_sid, sign_request.key_id & 0x7FFFFFFF);
 	if (!sid) {
 		talloc_free(tmp_ctx);
 		return signing_failure(ntp_signdconn, sign_request.packet_id);
 	}
 
-	/* Sign packet */
 	ret = ldb_search_exp_fmt(ntp_signdconn->ntp_signd->samdb, tmp_ctx,
 				 &res, samdb_base_dn(ntp_signdconn->ntp_signd->samdb),
 				 LDB_SCOPE_SUBTREE, attrs, "(&(objectSid=%s)(objectClass=computer))",
@@ -188,6 +191,7 @@ static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB wrapped_input)
 		return signing_failure(ntp_signdconn, sign_request.packet_id);
 	}
 
+	/* Generate the reply packet */
 	signed_reply.version = 1;
 	signed_reply.packet_id = sign_request.packet_id;
 	signed_reply.op = SIGNING_SUCCESS;
@@ -201,7 +205,6 @@ static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB wrapped_input)
 	}
 
 	memcpy(signed_reply.signed_packet.data, sign_request.packet_to_sign.data, sign_request.packet_to_sign.length);
-	
 	SIVAL(signed_reply.signed_packet.data, sign_request.packet_to_sign.length, sign_request.key_id);
 
 	/* Sign the NTP response with the unicodePwd */
@@ -210,8 +213,8 @@ static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB wrapped_input)
 	MD5Update(&ctx, sign_request.packet_to_sign.data, sign_request.packet_to_sign.length);
 	MD5Final(signed_reply.signed_packet.data + sign_request.packet_to_sign.length + 4, &ctx);
 
-	/* Place it into the packet for the wire */
 
+	/* Place it into the packet for the wire */
 	ndr_err = ndr_push_struct_blob(&output, tmp_ctx, 
 				       lp_iconv_convenience(ntp_signdconn->ntp_signd->task->lp_ctx),
 				       &signed_reply,
@@ -229,6 +232,7 @@ static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB wrapped_input)
 		return NT_STATUS_NO_MEMORY;
 	}
 
+	/* The 'wire' transport for this is wrapped with a 4 byte network byte order length */
 	RSIVAL(wrapped_output.data, 0, output.length);
 	memcpy(wrapped_output.data + 4, output.data, output.length);	
 
@@ -317,7 +321,15 @@ static void ntp_signd_task_init(struct task_server *task)
 
 	const struct model_ops *model_ops;
 
-	const char *address = "/tmp/ux_demo";
+	const char *address;
+
+	if (!directory_create_or_exist(lp_ntp_signd_socket_directory(task->lp_ctx), geteuid(), 0755)) {
+		char *error = talloc_asprintf(task, "Cannot create NTP signd pipe directory: %s", 
+					      lp_ntp_signd_socket_directory(task->lp_ctx));
+		task_server_terminate(task,
+				      error);
+		return;
+	}
 
 	/* within the ntp_signd task we want to be a single process, so
 	   ask for the single process model ops and pass these to the
@@ -345,6 +357,8 @@ static void ntp_signd_task_init(struct task_server *task)
 		return;
 	}
 
+	address = talloc_asprintf(ntp_signd, "%s/socket", lp_ntp_signd_socket_directory(task->lp_ctx));
+
 	status = stream_setup_socket(ntp_signd->task->event_ctx, 
 				     ntp_signd->task->lp_ctx,
 				     model_ops, 

source4/param/loadparm.c

@@ -179,6 +179,7 @@ struct loadparm_global
 	int bUnixExtensions;
 	int bDisableNetbios;
 	int bRpcBigEndian;
+	char *szNTPSignDSocketDirectory;
 	struct param_opt *param_opt;
 };
 
@@ -489,6 +490,8 @@ static struct parm_struct parm_table[] = {
 	{"template homedir", P_STRING, P_GLOBAL, GLOBAL_VAR(szTemplateHomedir), NULL, NULL },
 	{"idmap trusted only", P_BOOL, P_GLOBAL, GLOBAL_VAR(bIdmapTrustedOnly), NULL, NULL},
 
+	{"ntp signd socket directory", P_STRING, P_GLOBAL, GLOBAL_VAR(szNTPSignDSocketDirectory), NULL, NULL },
+
 	{NULL, P_BOOL, P_NONE, 0, NULL, NULL}
 };
 
@@ -730,6 +733,8 @@ _PUBLIC_ FN_LOCAL_INTEGER(lp_force_dir_mode, iDir_force_mode)
 _PUBLIC_ FN_GLOBAL_INTEGER(lp_server_signing, server_signing)
 _PUBLIC_ FN_GLOBAL_INTEGER(lp_client_signing, client_signing)
 
+_PUBLIC_ FN_GLOBAL_CONST_STRING(lp_ntp_signd_socket_directory, szNTPSignDSocketDirectory)
+
 /* local prototypes */
 static int map_parameter(const char *pszParmName);
 static struct loadparm_service *getservicebyname(struct loadparm_context *lp_ctx, 
@@ -2410,6 +2415,8 @@ struct loadparm_context *loadparm_init(TALLOC_CTX *mem_ctx)
 
 	lp_do_global_parameter(lp_ctx, "prefork children:smb", "4");
 
+	lp_do_global_parameter(lp_ctx, "ntp signd socket directory", dyn_NTP_SIGND_SOCKET_DIR);
+
 	for (i = 0; parm_table[i].label; i++) {
 		if (!(lp_ctx->flags[i] & FLAG_CMDLINE)) {
 			lp_ctx->flags[i] |= FLAG_DEFAULT;

source4/param/param.h

@@ -186,6 +186,8 @@ int lp_dir_mask(struct loadparm_service *, struct loadparm_service *);
 int lp_force_dir_mode(struct loadparm_service *, struct loadparm_service *);
 int lp_server_signing(struct loadparm_context *);
 int lp_client_signing(struct loadparm_context *);
+const char *lp_ntp_signd_socket_directory(struct loadparm_context *);
+
 const char *lp_get_parametric(struct loadparm_context *lp_ctx,
 			      struct loadparm_service *service,
 			      const char *type, const char *option);