[PATCH 4/5] s3-rpc: add server support for mgmt_inq_princ_name

[David Disseldorp]

Return the servers service principle name, as defined in MS-RPCE
2.2.1.3.4. This method is called by the diskshadow.exe FSRVP client.

Signed-off-by: David Disseldorp <ddiss at samba.org>
---
 librpc/idl/mgmt.idl                   | 11 ++++++++++-
 source3/rpc_server/mgmt/srv_mgmt_nt.c | 20 ++++++++++++++++++--
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/librpc/idl/mgmt.idl b/librpc/idl/mgmt.idl
index 17c8cc4..d64e0c0 100644
--- a/librpc/idl/mgmt.idl
+++ b/librpc/idl/mgmt.idl
@@ -9,9 +9,18 @@ import "misc.idl";
   version(1.0),
   pointer_default(unique),
   helpstring("DCE/RPC Remote Management")
-] 
+]
 interface mgmt
 {
+	/* MS-RPCE 2.2.1.1.7 Security Providers */
+	const uint32 MGMT_AUTHN_NONE = 0x00;
+	const uint32 MGMT_AUTHN_GSS_NEG = 0x09;
+	const uint32 MGMT_AUTHN_WINNT = 0x0A;
+	const uint32 MGMT_AUTHN_GSS_SCHANNEL = 0x0E;
+	const uint32 MGMT_AUTHN_GSS_KERBEROS = 0x10;
+	const uint32 MGMT_AUTHN_NETLOGON = 0x44;
+	const uint32 MGMT_AUTHN_DEFAULT = 0xFF;
+
 	typedef struct {
 		ndr_syntax_id *id;
 	} ndr_syntax_id_p;
diff --git a/source3/rpc_server/mgmt/srv_mgmt_nt.c b/source3/rpc_server/mgmt/srv_mgmt_nt.c
index c0a4122..cf4563e 100644
--- a/source3/rpc_server/mgmt/srv_mgmt_nt.c
+++ b/source3/rpc_server/mgmt/srv_mgmt_nt.c
@@ -65,6 +65,22 @@ WERROR _mgmt_stop_server_listening(struct pipes_struct *p,
 WERROR _mgmt_inq_princ_name(struct pipes_struct *p,
 			    struct mgmt_inq_princ_name *r)
 {
-	p->fault_state = DCERPC_FAULT_OP_RNG_ERROR;
-	return WERR_NOT_SUPPORTED;
+	int ret;
+
+	if (r->in.authn_proto != MGMT_AUTHN_GSS_NEG) {
+		DEBUG(0, ("unsupported authn_proto %u\n",
+			  (unsigned)r->in.authn_proto));
+		return WERR_INVALID_PARAM;
+	}
+
+	ret = snprintf(r->out.princ_name, r->in.princ_name_size, "%s$@%s",
+		       lp_netbios_name(), lp_realm());
+	if ((ret < 0) || (ret >= r->in.princ_name_size)) {
+		return WERR_BUFFER_OVERFLOW;
+	}
+
+	DEBUG(6, ("returning principle name: %s\n",
+		  r->out.princ_name));
+
+	return WERR_OK;
 }
-- 
1.8.1.4