s3: Implement wbcGetpwsid

* Adds the plumbing required to lookup users by sid into winbind, wbinfo
  and smbd helper lib (winbind_util.c).
* Removes some double declarations of winbind_util.c functions.
* Bumps the winbind protocol version to 21 and the minor version of
  wbclient to 3.

4 files changed, 92 insertions, 4 deletions

diff --git a/nsswitch/libwbclient/wbc_pwd.c b/nsswitch/libwbclient/wbc_pwd.c
index cd945996c89..dacd9499dd4 100644
--- a/nsswitch/libwbclient/wbc_pwd.c
+++ b/nsswitch/libwbclient/wbc_pwd.c
@@ -190,6 +190,45 @@ wbcErr wbcGetpwuid(uid_t uid, struct passwd **pwd)
 	return wbc_status;
 }
 
+/* Fill in a struct passwd* for a domain user based on sid */
+wbcErr wbcGetpwsid(struct wbcDomainSid *sid, struct passwd **pwd)
+{
+	wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
+	struct winbindd_request request;
+	struct winbindd_response response;
+	char * sid_string = NULL;
+
+	if (!pwd) {
+		wbc_status = WBC_ERR_INVALID_PARAM;
+		BAIL_ON_WBC_ERROR(wbc_status);
+	}
+
+	wbc_status = wbcSidToString(sid, &sid_string);
+	BAIL_ON_WBC_ERROR(wbc_status);
+
+	/* Initialize request */
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(response);
+
+	strncpy(request.data.sid, sid_string, sizeof(request.data.sid));
+
+	wbc_status = wbcRequestResponse(WINBINDD_GETPWSID,
+					&request,
+					&response);
+	BAIL_ON_WBC_ERROR(wbc_status);
+
+	*pwd = copy_passwd_entry(&response.data.pw);
+	BAIL_ON_PTR_ERROR(*pwd, wbc_status);
+
+ done:
+	if (sid_string) {
+		wbcFreeMemory(sid_string);
+	}
+
+	return wbc_status;
+}
+
 /* Fill in a struct passwd* for a domain user based on username */
 wbcErr wbcGetgrnam(const char *name, struct group **grp)
 {
diff --git a/nsswitch/libwbclient/wbclient.h b/nsswitch/libwbclient/wbclient.h
index 990cc52df79..4663624f91f 100644
--- a/nsswitch/libwbclient/wbclient.h
+++ b/nsswitch/libwbclient/wbclient.h
@@ -60,9 +60,10 @@ const char *wbcErrorString(wbcErr error);
  *  0.1: Initial version
  *  0.2: Added wbcRemoveUidMapping()
  *       Added wbcRemoveGidMapping()
+ *  0.3: Added wbcGetpwsid()
  **/
 #define WBCLIENT_MAJOR_VERSION 0
-#define WBCLIENT_MINOR_VERSION 2
+#define WBCLIENT_MINOR_VERSION 3
 #define WBCLIENT_VENDOR_VERSION "Samba libwbclient"
 struct wbcLibraryDetails {
 	uint16_t major_version;
@@ -838,6 +839,17 @@ wbcErr wbcGetpwuid(uid_t uid, struct passwd **pwd);
 
 /**
  * @brief Fill in a struct passwd* for a domain user based
+ *   on sid
+ *
+ * @param sid       Sid to lookup
+ * @param **pwd     Pointer to resulting struct passwd* from the query.
+ *
+ * @return #wbcErr
+ **/
+wbcErr wbcGetpwsid(struct wbcDomainSid * sid, struct passwd **pwd);
+
+/**
+ * @brief Fill in a struct passwd* for a domain user based
  *   on username
  *
  * @param *name     Username to lookup
diff --git a/nsswitch/wbinfo.c b/nsswitch/wbinfo.c
index ce53cadc583..372896ce71b 100644
--- a/nsswitch/wbinfo.c
+++ b/nsswitch/wbinfo.c
@@ -202,6 +202,31 @@ static bool wbinfo_get_uidinfo(int uid)
 	return true;
 }
 
+static bool wbinfo_get_user_sidinfo(const char *sid_str)
+{
+	wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
+	struct passwd *pwd = NULL;
+	struct wbcDomainSid sid;
+
+	wbc_status = wbcStringToSid(sid_str, &sid);
+	wbc_status = wbcGetpwsid(&sid, &pwd);
+	if (!WBC_ERROR_IS_OK(wbc_status)) {
+		return false;
+	}
+
+	d_printf("%s:%s:%d:%d:%s:%s:%s\n",
+		 pwd->pw_name,
+		 pwd->pw_passwd,
+		 pwd->pw_uid,
+		 pwd->pw_gid,
+		 pwd->pw_gecos,
+		 pwd->pw_dir,
+		 pwd->pw_shell);
+
+	return true;
+}
+
+
 /* pull grent for a given group */
 static bool wbinfo_get_groupinfo(const char *group)
 {
@@ -1564,6 +1589,7 @@ enum {
 	OPT_LIST_ALL_DOMAINS,
 	OPT_LIST_OWN_DOMAIN,
 	OPT_UID_INFO,
+	OPT_USER_SIDINFO,
 	OPT_GROUP_INFO,
 	OPT_GID_INFO,
 	OPT_VERBOSE,
@@ -1622,6 +1648,7 @@ int main(int argc, char **argv, char **envp)
 		{ "user-info", 'i', POPT_ARG_STRING, &string_arg, 'i', "Get user info", "USER" },
 		{ "uid-info", 0, POPT_ARG_INT, &int_arg, OPT_UID_INFO, "Get user info from uid", "UID" },
 		{ "group-info", 0, POPT_ARG_STRING, &string_arg, OPT_GROUP_INFO, "Get group info", "GROUP" },
+		{ "user-sidinfo", 0, POPT_ARG_STRING, &string_arg, OPT_USER_SIDINFO, "Get user info from sid", "SID" },
 		{ "gid-info", 0, POPT_ARG_INT, &int_arg, OPT_GID_INFO, "Get group info from gid", "GID" },
 		{ "user-groups", 'r', POPT_ARG_STRING, &string_arg, 'r', "Get user groups", "USER" },
 		{ "user-domgroups", 0, POPT_ARG_STRING, &string_arg,
@@ -1860,6 +1887,13 @@ int main(int argc, char **argv, char **envp)
 				goto done;
 			}
 			break;
+		case OPT_USER_SIDINFO:
+			if ( !wbinfo_get_user_sidinfo(string_arg)) {
+				d_fprintf(stderr, "Could not get info for user sid %s\n",
+				    string_arg);
+				goto done;
+			}
+			break;
 		case OPT_UID_INFO:
 			if ( !wbinfo_get_uidinfo(int_arg)) {
 				d_fprintf(stderr, "Could not get info for uid "
diff --git a/nsswitch/winbind_struct_protocol.h b/nsswitch/winbind_struct_protocol.h
index 0b3e74492c5..26e45f3c7f8 100644
--- a/nsswitch/winbind_struct_protocol.h
+++ b/nsswitch/winbind_struct_protocol.h
@@ -39,9 +39,11 @@
 #define WINBINDD_DONT_ENV    "_NO_WINBINDD"
 #define WINBINDD_LOCATOR_KDC_ADDRESS "WINBINDD_LOCATOR_KDC_ADDRESS"
 
-/* Update this when you change the interface.  */
-
-#define WINBIND_INTERFACE_VERSION 20
+/* Update this when you change the interface.
+ * 21: added WINBINDD_GETPWSID
+ *     added WINBINDD_GETSIDALIASES
+ */
+#define WINBIND_INTERFACE_VERSION 21
 
 /* Have to deal with time_t being 4 or 8 bytes due to structure alignment.
    On a 64bit Linux box, we have to support a constant structure size
@@ -60,6 +62,7 @@ enum winbindd_cmd {
 
 	WINBINDD_GETPWNAM,
 	WINBINDD_GETPWUID,
+	WINBINDD_GETPWSID,
 	WINBINDD_GETGRNAM,
 	WINBINDD_GETGRGID,
 	WINBINDD_GETGROUPS,