Add fetch function for GPO which fetches all relevant files from the sysvol share.

Signed-off-by: Jelmer Vernooij <jelmer@samba.org>

1 files changed, 263 insertions, 0 deletions

diff --git a/source4/lib/policy/gp_filesys.c b/source4/lib/policy/gp_filesys.c
new file mode 100644
index 0000000000..bb42fa2984
--- /dev/null
+++ b/source4/lib/policy/gp_filesys.c
@@ -0,0 +1,263 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *  Group Policy Object Support
+ *  Copyright (C) Wilco Baan Hofman 2008-2010
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "includes.h"
+#include "lib/policy/policy.h"
+#include "libcli/raw/smb.h"
+#include "libcli/libcli.h"
+#include "param/param.h"
+#include "libcli/resolve/resolve.h"
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#define GP_MAX_DEPTH 25
+
+struct gp_list_state {
+	struct gp_context *gp_ctx;
+	uint8_t depth;
+	const char *cur_rel_path;
+	const char *share_path;
+	const char *local_path;
+};
+
+static NTSTATUS gp_do_list(const char *, struct gp_list_state *);
+
+/* Create a temporary policy directory */
+static const char *gp_tmpdir(TALLOC_CTX *mem_ctx)
+{
+	const char *gp_dir = talloc_asprintf(mem_ctx, "%s/policy", tmpdir());
+	struct stat st;
+
+	if (stat(gp_dir, &st) != 0) {
+		mkdir(gp_dir, 0755);
+	}
+
+	return gp_dir;
+}
+
+/* This function is called by the smbcli_list function */
+static void gp_list_helper (struct clilist_file_info *info, const char *mask, void *list_state_ptr)
+{
+	struct gp_list_state *state = list_state_ptr;
+	const char *rel_path, *full_remote_path;
+	char *local_rel_path, *full_local_path;
+	unsigned int i;
+	int fh_remote, fh_local;
+	uint8_t *buf;
+	size_t nread = 0;
+	size_t buf_size = 1024;
+
+	/* If the relative path is empty, then avoid the extra slash */
+	if (state->cur_rel_path[0] != '\0') {
+		/* Get local path by replacing backslashes with slashes */
+		local_rel_path = talloc_strdup(state, state->cur_rel_path);
+		for (i = 0; local_rel_path[i] != '\0'; i++) {
+			if (local_rel_path[i] == '\\') {
+				local_rel_path[i] = '/';
+			}
+		}
+		full_local_path = talloc_asprintf(state, "%s/%s/%s", state->local_path, local_rel_path, info->name);
+	} else {
+		full_local_path = talloc_asprintf(state, "%s/%s", state->local_path, info->name);
+	}
+
+	/* Directory */
+	if (info->attrib & FILE_ATTRIBUTE_DIRECTORY) {
+		if (state->depth >= GP_MAX_DEPTH)
+			return;
+		if (strcmp(info->name, ".") == 0 || strcmp(info->name, "..") == 0)
+			return;
+
+		mkdir(full_local_path, 0755);
+
+		/* If the relative path is empty, then avoid the extra backslash */
+		if (state->cur_rel_path[0] != '\0') {
+			rel_path = info->name;
+		} else {
+			rel_path = talloc_asprintf(state, "%s\\%s", state->cur_rel_path, info->name);
+		}
+
+		/* Recurse into this directory */
+		gp_do_list(rel_path, state);
+		return;
+	}
+
+	/* If the relative path is empty, then avoid the extra backslash */
+	if (state->cur_rel_path[0] != '\0') {
+		full_remote_path = talloc_asprintf(state, "%s\\%s\\%s", state->share_path, state->cur_rel_path, info->name);
+	} else {
+		full_remote_path = talloc_asprintf(state, "%s\\%s", state->share_path, info->name);
+	}
+
+	/* Open the remote file */
+	fh_remote = smbcli_open(state->gp_ctx->cli->tree, full_remote_path, O_RDONLY, DENY_NONE);
+	if (fh_remote == -1) {
+		DEBUG(0, ("Failed to open remote file: %s\n", full_remote_path));
+		return;
+	}
+
+	/* Open the local file */
+	fh_local = open(full_local_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+	if (fh_local == -1) {
+		DEBUG(0, ("Failed to open local file: %s\n", full_local_path));
+		return;
+	}
+
+	/* Copy the contents of the file */
+	buf = talloc_zero_array(state, uint8_t, buf_size);
+	while (1) {
+		int n = smbcli_read(state->gp_ctx->cli->tree, fh_remote, buf, nread, buf_size);
+		if (n <= 0) {
+			break;
+		}
+		if (write(fh_local, buf, n) != n) {
+			DEBUG(0, ("Short write while copying file.\n"));
+			return;
+		}
+		nread += n;
+	}
+	/* Close the files */
+	smbcli_close(state->gp_ctx->cli->tree, fh_remote);
+	close(fh_local);
+
+	return;
+}
+
+static NTSTATUS gp_do_list (const char *rel_path, struct gp_list_state *state)
+{
+	uint16_t attributes;
+	int success;
+	char *mask;
+	const char *old_rel_path;
+
+	attributes = FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_DIRECTORY;
+
+	/* Update the relative paths, while buffering the parent */
+	old_rel_path = state->cur_rel_path;
+	state->cur_rel_path = rel_path;
+	state->depth++;
+
+	/* Get the current mask */
+	mask = talloc_asprintf(state, "%s\\%s\\*", state->share_path, rel_path);
+	success = smbcli_list(state->gp_ctx->cli->tree, mask, attributes, gp_list_helper, state);
+	talloc_free(mask);
+
+	/* Go back to the state of the parent */
+	state->cur_rel_path = old_rel_path;
+	state->depth--;
+
+	if (!success)
+		return NT_STATUS_UNSUCCESSFUL;
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS gp_cli_connect(struct gp_context *gp_ctx)
+{
+	struct smbcli_options options;
+        struct smbcli_session_options session_options;
+
+	if (gp_ctx->cli != NULL)
+		return NT_STATUS_OK;
+
+	gp_ctx->cli = smbcli_state_init(gp_ctx);
+
+	lp_smbcli_options(gp_ctx->lp_ctx, &options);
+	lp_smbcli_session_options(gp_ctx->lp_ctx, &session_options);
+
+
+	return smbcli_full_connection(gp_ctx,
+			&gp_ctx->cli,
+			gp_ctx->active_dc.name,
+			lp_smb_ports(gp_ctx->lp_ctx),
+			"sysvol",
+			NULL,
+			lp_socket_options(gp_ctx->lp_ctx),
+			gp_ctx->credentials,
+			lp_resolve_context(gp_ctx->lp_ctx),
+			gp_ctx->ev_ctx,
+			&options,
+			&session_options,
+			lp_iconv_convenience(gp_ctx->lp_ctx),
+			lp_gensec_settings(gp_ctx, gp_ctx->lp_ctx));
+
+	return NT_STATUS_OK;
+}
+
+NTSTATUS gp_fetch_gpo (struct gp_context *gp_ctx, struct gp_object *gpo, const char **ret_local_path)
+{
+	TALLOC_CTX *mem_ctx;
+	struct gp_list_state *state;
+	NTSTATUS status;
+	unsigned int i, bkslash_cnt;
+	struct stat st;
+	int rv;
+
+	/* Create a forked memory context, as a base for everything here */
+	mem_ctx = talloc_new(gp_ctx);
+
+
+	if (gp_ctx->cli == NULL) {
+		status = gp_cli_connect(gp_ctx);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(0, ("Failed to create cli connection to DC\n"));
+			talloc_free(mem_ctx);
+			return status;
+		}
+	}
+
+	/* Prepare the state structure */
+	state = talloc_zero(mem_ctx, struct gp_list_state);
+	state->gp_ctx = gp_ctx;
+	state->local_path = talloc_asprintf(gp_ctx, "%s/%s", gp_tmpdir(mem_ctx), gpo->name);
+
+	/* Get the path from the share down (\\..\..\(this\stuff) */
+	for (i = 0, bkslash_cnt = 0; gpo->file_sys_path[i] != '\0'; i++) {
+		if (gpo->file_sys_path[i] == '\\')
+			bkslash_cnt++;
+
+		if (bkslash_cnt == 4) {
+			state->share_path = talloc_strdup(mem_ctx, &gpo->file_sys_path[i]);
+			break;
+		}
+	}
+
+	/* Create the GPO dir if it does not exist */
+	if (stat(state->local_path, &st) != 0) {
+		rv = mkdir(state->local_path, 755);
+		if (rv < 0) {
+			DEBUG(0, ("Could not create local path\n"));
+			talloc_free(mem_ctx);
+			return NT_STATUS_UNSUCCESSFUL;
+		}
+	}
+
+	/* Copy the files */
+	status = gp_do_list("", state);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Could not list GPO files on remote server\n"));
+		talloc_free(mem_ctx);
+		return status;
+	}
+
+	/* Return the local path to the gpo */
+	*ret_local_path = state->local_path;
+
+	talloc_free(mem_ctx);
+	return NT_STATUS_OK;
+}