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-rw-r--r--source4/Makefile1
-rw-r--r--source4/build/m4/check_path.m419
-rw-r--r--source4/dynconfig/config.mk3
-rw-r--r--source4/dynconfig/dynconfig.c3
-rw-r--r--source4/dynconfig/dynconfig.h1
-rw-r--r--source4/headermap.txt1
-rw-r--r--source4/librpc/config.mk2
-rw-r--r--source4/librpc/idl/ntp_signd.idl14
-rw-r--r--source4/ntp_signd/ntp_signd.c151
-rw-r--r--source4/param/loadparm.c7
-rw-r--r--source4/param/param.h2
11 files changed, 180 insertions, 24 deletions
diff --git a/source4/Makefile b/source4/Makefile
index 14d0fe3b20..b7d5206868 100644
--- a/source4/Makefile
+++ b/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 = $(srcdir)'
diff --git a/source4/build/m4/check_path.m4 b/source4/build/m4/check_path.m4
index 08a858ebb2..c0b81f1a8d 100644
--- a/source4/build/m4/check_path.m4
+++ b/source4/build/m4/check_path.m4
@@ -20,6 +20,7 @@ piddir="${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="${localstatedir}/run/samba/winbind_pipe"
)
@@ -67,6 +69,22 @@ AC_ARG_WITH(winbindd-socket-dir,
esac])
#################################################
+# set where the NTP signing deamon socket should be put
+AC_ARG_WITH(ntp-signd-socket-dir,
+[ --with-ntp-signd-socket-dir=DIR Where to put the NTP signing deamon socket ($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,
[ --with-lockdir=DIR Where to put lock files ($ac_default_prefix/var/locks)],
@@ -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)
#################################################
diff --git a/source4/dynconfig/config.mk b/source4/dynconfig/config.mk
index 5f2887f8b6..a353ba1214 100644
--- a/source4/dynconfig/config.mk
+++ b/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)\"
diff --git a/source4/dynconfig/dynconfig.c b/source4/dynconfig/dynconfig.c
index 6dbbf872d9..ef5c40d698 100644
--- a/source4/dynconfig/dynconfig.c
+++ b/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;
diff --git a/source4/dynconfig/dynconfig.h b/source4/dynconfig/dynconfig.h
index ac54db63d6..e77c13bab3 100644
--- a/source4/dynconfig/dynconfig.h
+++ b/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;
diff --git a/source4/headermap.txt b/source4/headermap.txt
index 4949710aab..e2bbb167ed 100644
--- a/source4/headermap.txt
+++ b/source4/headermap.txt
@@ -48,7 +48,6 @@ lib/torture/torture.h: torture.h
libcli/libcli.h: client.h
librpc/gen_ndr/nbt.h: gen_ndr/nbt.h
librpc/gen_ndr/ntp_signd.h: gen_ndr/ntp_signd.h
-librpc/gen_ndr/ndr_ntp_signd.h: gen_ndr/ndr_ntp_signd.h
librpc/gen_ndr/svcctl.h: gen_ndr/svcctl.h
librpc/gen_ndr/ndr_svcctl.h: gen_ndr/ndr_svcctl.h
librpc/gen_ndr/ndr_svcctl_c.h: gen_ndr/ndr_svcctl_c.h
diff --git a/source4/librpc/config.mk b/source4/librpc/config.mk
index fd628a2788..d2e11959e8 100644
--- a/source4/librpc/config.mk
+++ b/source4/librpc/config.mk
@@ -343,8 +343,6 @@ PUBLIC_DEPENDENCIES = LIBNDR
NDR_NTP_SIGND_OBJ_FILES = $(gen_ndrsrcdir)/ndr_ntp_signd.o
-PUBLIC_HEADERS += $(gen_ndrsrcdir)/ndr_ntp_signd.h
-
[SUBSYSTEM::NDR_WINSREPL]
PUBLIC_DEPENDENCIES = LIBNDR NDR_NBT
diff --git a/source4/librpc/idl/ntp_signd.idl b/source4/librpc/idl/ntp_signd.idl
index 2863401389..2b2fbc7662 100644
--- a/source4/librpc/idl/ntp_signd.idl
+++ b/source4/librpc/idl/ntp_signd.idl
@@ -12,10 +12,18 @@
interface ntp_signd
{
+ typedef [v1_enum] enum {
+ SIGN_TO_CLIENT = 0,
+ ASK_SERVER_TO_SIGN = 1,
+ CHECK_SERVER_SIGNATURE = 2,
+ SIGNING_SUCCESS = 3,
+ SIGNING_FAILURE = 4
+ } ntp_signd_op;
+
typedef [flag(NDR_BIG_ENDIAN),public] struct {
uint32 version;
- uint32 op;
- uint32 packet_id;
+ ntp_signd_op op;
+ uint16 packet_id;
[flag(NDR_LITTLE_ENDIAN)] uint32 key_id;
[flag(NDR_REMAINING)] DATA_BLOB packet_to_sign;
@@ -23,7 +31,7 @@ interface ntp_signd
typedef [flag(NDR_BIG_ENDIAN),public] struct samba_key_out {
uint32 version;
- uint32 op;
+ ntp_signd_op op;
uint32 packet_id;
[flag(NDR_REMAINING)] DATA_BLOB signed_packet;
} signed_reply;
diff --git a/source4/ntp_signd/ntp_signd.c b/source4/ntp_signd/ntp_signd.c
index 35016d5c61..fdd97e475c 100644
--- a/source4/ntp_signd/ntp_signd.c
+++ b/source4/ntp_signd/ntp_signd.c
@@ -34,6 +34,8 @@
#include "libcli/security/security.h"
#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
@@ -61,27 +63,76 @@ static void ntp_signd_terminate_connection(struct ntp_signd_connection *ntp_sign
stream_terminate_connection(ntp_signdconn->conn, reason);
}
+static NTSTATUS signing_failure(struct ntp_signd_connection *ntp_signdconn,
+ uint32_t packet_id)
+{
+ NTSTATUS status;
+ struct signed_reply signed_reply;
+ TALLOC_CTX *tmp_ctx = talloc_new(ntp_signdconn);
+ DATA_BLOB reply, blob;
+ enum ndr_err_code ndr_err;
+
+ NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+ signed_reply.version = 1;
+ signed_reply.op = SIGNING_FAILURE;
+ signed_reply.packet_id = packet_id;
+ signed_reply.signed_packet = data_blob(NULL, 0);
+
+ ndr_err = ndr_push_struct_blob(&reply, tmp_ctx,
+ lp_iconv_convenience(ntp_signdconn->ntp_signd->task->lp_ctx),
+ &signed_reply,
+ (ndr_push_flags_fn_t)ndr_push_signed_reply);
+
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(1,("failed to push ntp error reply\n"));
+ talloc_free(tmp_ctx);
+ return ndr_map_error2ntstatus(ndr_err);
+ }
+
+ blob = data_blob_talloc(ntp_signdconn, NULL, reply.length + 4);
+ if (!blob.data) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ RSIVAL(blob.data, 0, reply.length);
+ memcpy(blob.data + 4, reply.data, reply.length);
+
+ status = packet_send(ntp_signdconn->packet, blob);
+
+ /* the call isn't needed any more */
+ talloc_free(tmp_ctx);
+
+ return status;
+}
+
/*
receive a full packet on a NTP_SIGND connection
*/
-static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB blob)
+static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB wrapped_input)
{
struct ntp_signd_connection *ntp_signdconn = talloc_get_type(private,
struct ntp_signd_connection);
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
TALLOC_CTX *tmp_ctx = talloc_new(ntp_signdconn);
- DATA_BLOB input, reply;
+ DATA_BLOB input, output, wrapped_output;
const struct dom_sid *domain_sid;
struct dom_sid *sid;
struct sign_request sign_request;
+ struct signed_reply signed_reply;
enum ndr_err_code ndr_err;
struct ldb_result *res;
const char *attrs[] = { "unicodePwd", NULL };
+ struct MD5Context ctx;
+ struct samr_Password *nt_hash;
int ret;
- talloc_steal(tmp_ctx, blob.data);
+ NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+ talloc_steal(tmp_ctx, wrapped_input.data);
- input = data_blob_const(blob.data + 4, blob.length - 4);
+ input = data_blob_const(wrapped_input.data + 4, wrapped_input.length - 4);
ndr_err = ndr_pull_struct_blob_all(&input, tmp_ctx,
lp_iconv_convenience(ntp_signdconn->ntp_signd->task->lp_ctx),
@@ -94,43 +145,98 @@ static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB blob)
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);
+ }
+
domain_sid = samdb_domain_sid(ntp_signdconn->ntp_signd->samdb);
if (!domain_sid) {
- return NT_STATUS_INVALID_PARAMETER;
+ talloc_free(tmp_ctx);
+ 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) {
- return NT_STATUS_NO_MEMORY;
+ 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))",
dom_sid_string(tmp_ctx, sid));
if (ret != LDB_SUCCESS) {
- return NT_STATUS_UNSUCCESSFUL;
+ DEBUG(2, ("Failed to search for SID %s in SAM for NTP signing: %s\n", dom_sid_string(tmp_ctx, sid),
+ ldb_errstring(ntp_signdconn->ntp_signd->samdb)));
+ talloc_free(tmp_ctx);
+ return signing_failure(ntp_signdconn, sign_request.packet_id);
+ }
+
+ if (res->count == 0) {
+ DEBUG(5, ("Failed to find SID %s in SAM for NTP signing\n", dom_sid_string(tmp_ctx, sid)));
+ } else if (res->count != 1) {
+ DEBUG(1, ("Found SID %s %u times in SAM for NTP signing\n", dom_sid_string(tmp_ctx, sid), res->count));
+ talloc_free(tmp_ctx);
+ return signing_failure(ntp_signdconn, sign_request.packet_id);
+ }
+
+ nt_hash = samdb_result_hash(tmp_ctx, res->msgs[0], "unicodePwd");
+ if (!nt_hash) {
+ DEBUG(1, ("No unicodePwd found on record of SID %s for NTP signing\n", dom_sid_string(tmp_ctx, sid)));
+ talloc_free(tmp_ctx);
+ return signing_failure(ntp_signdconn, sign_request.packet_id);
}
- if (res->count != 1) {
- return NT_STATUS_NO_SUCH_USER;
+ /* Generate the reply packet */
+ signed_reply.version = 1;
+ signed_reply.packet_id = sign_request.packet_id;
+ signed_reply.op = SIGNING_SUCCESS;
+ signed_reply.signed_packet = data_blob_talloc(tmp_ctx,
+ NULL,
+ sign_request.packet_to_sign.length + 20);
+
+ if (!signed_reply.signed_packet.data) {
+ talloc_free(tmp_ctx);
+ return signing_failure(ntp_signdconn, sign_request.packet_id);
}
+ 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 */
+ MD5Init(&ctx);
+ MD5Update(&ctx, nt_hash->hash, sizeof(nt_hash->hash));
+ 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 */
+ ndr_err = ndr_push_struct_blob(&output, tmp_ctx,
+ lp_iconv_convenience(ntp_signdconn->ntp_signd->task->lp_ctx),
+ &signed_reply,
+ (ndr_push_flags_fn_t)ndr_push_signed_reply);
- blob = data_blob_talloc(ntp_signdconn, NULL, reply.length + 4);
- if (!blob.data) {
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(1,("failed to push ntp error reply\n"));
+ talloc_free(tmp_ctx);
+ return ndr_map_error2ntstatus(ndr_err);
+ }
+
+ wrapped_output = data_blob_talloc(ntp_signdconn, NULL, output.length + 4);
+ if (!wrapped_output.data) {
talloc_free(tmp_ctx);
return NT_STATUS_NO_MEMORY;
}
- RSIVAL(blob.data, 0, reply.length);
- memcpy(blob.data + 4, reply.data, reply.length);
+ /* 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);
- status = packet_send(ntp_signdconn->packet, blob);
+ status = packet_send(ntp_signdconn->packet, wrapped_output);
/* the call isn't needed any more */
talloc_free(tmp_ctx);
@@ -215,7 +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
@@ -236,12 +350,15 @@ static void ntp_signd_task_init(struct task_server *task)
ntp_signd->task = task;
- ntp_signd->samdb = samdb_connect(ntp_signd, task->event_ctx, task->lp_ctx, anonymous_session(ntp_signd, task->event_ctx, task->lp_ctx));
+ /* Must be system to get at the password hashes */
+ ntp_signd->samdb = samdb_connect(ntp_signd, task->event_ctx, task->lp_ctx, system_session(ntp_signd, task->lp_ctx));
if (ntp_signd->samdb == NULL) {
task_server_terminate(task, "ntp_signd failed to open samdb");
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,
diff --git a/source4/param/loadparm.c b/source4/param/loadparm.c
index ad1752a7e7..0a7aec1985 100644
--- a/source4/param/loadparm.c
+++ b/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;
diff --git a/source4/param/param.h b/source4/param/param.h
index 0b276cdff2..06a42575ad 100644
--- a/source4/param/param.h
+++ b/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);
generated by cgit (git 2.34.1) at 2024-08-13 19:16:04 +0000