Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 543 insertions, 0 deletions

diff --git a/source4/lib/registry/patchfile.c b/source4/lib/registry/patchfile.c
new file mode 100644
index 0000000..8069ed7
--- /dev/null
+++ b/source4/lib/registry/patchfile.c
@@ -0,0 +1,543 @@
+/*
+   Unix SMB/CIFS implementation.
+   Reading registry patch files
+
+   Copyright (C) Jelmer Vernooij 2004-2007
+   Copyright (C) Wilco Baan Hofman 2006
+   Copyright (C) Matthias Dieter Wallnöfer 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/registry/registry.h"
+#include "system/filesys.h"
+
+
+_PUBLIC_ WERROR reg_preg_diff_load(int fd,
+				   const struct reg_diff_callbacks *callbacks,
+				   void *callback_data);
+
+_PUBLIC_ WERROR reg_dotreg_diff_load(int fd,
+				     const struct reg_diff_callbacks *callbacks,
+				     void *callback_data);
+
+/*
+ * Generate difference between two keys
+ */
+WERROR reg_generate_diff_key(struct registry_key *oldkey,
+			     struct registry_key *newkey,
+			     const char *path,
+			     const struct reg_diff_callbacks *callbacks,
+			     void *callback_data)
+{
+	unsigned int i;
+	struct registry_key *t1 = NULL, *t2 = NULL;
+	char *tmppath;
+	const char *keyname1;
+	WERROR error, error1, error2;
+	TALLOC_CTX *mem_ctx = talloc_init("writediff");
+	uint32_t old_num_subkeys, old_num_values,
+			 new_num_subkeys, new_num_values;
+
+	if (oldkey != NULL) {
+		error = reg_key_get_info(mem_ctx, oldkey, NULL,
+					 &old_num_subkeys, &old_num_values,
+					 NULL, NULL, NULL, NULL);
+		if (!W_ERROR_IS_OK(error)) {
+			DEBUG(0, ("Error occurred while getting key info: %s\n",
+				win_errstr(error)));
+			talloc_free(mem_ctx);
+			return error;
+		}
+	} else {
+		old_num_subkeys = 0;
+		old_num_values = 0;
+	}
+
+	/* Subkeys that were changed or deleted */
+	for (i = 0; i < old_num_subkeys; i++) {
+		error1 = reg_key_get_subkey_by_index(mem_ctx, oldkey, i,
+						     &keyname1, NULL, NULL);
+		if (!W_ERROR_IS_OK(error1)) {
+			DEBUG(0, ("Error occurred while getting subkey by index: %s\n",
+				win_errstr(error1)));
+			continue;
+		}
+
+		if (newkey != NULL) {
+			error2 = reg_open_key(mem_ctx, newkey, keyname1, &t2);
+		} else {
+			error2 = WERR_FILE_NOT_FOUND;
+			t2 = NULL;
+		}
+
+		if (!W_ERROR_IS_OK(error2) && !W_ERROR_EQUAL(error2, WERR_FILE_NOT_FOUND)) {
+			DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
+				win_errstr(error2)));
+			talloc_free(mem_ctx);
+			return error2;
+		}
+
+		/* if "error2" is going to be "WERR_FILE_NOT_FOUND", then newkey */
+		/* didn't have such a subkey and therefore add a del diff */
+		tmppath = talloc_asprintf(mem_ctx, "%s\\%s", path, keyname1);
+		if (tmppath == NULL) {
+			DEBUG(0, ("Out of memory\n"));
+			talloc_free(mem_ctx);
+			return WERR_NOT_ENOUGH_MEMORY;
+		}
+		if (!W_ERROR_IS_OK(error2))
+			callbacks->del_key(callback_data, tmppath);
+
+		/* perform here also the recursive invocation */
+		error1 = reg_open_key(mem_ctx, oldkey, keyname1, &t1);
+		if (!W_ERROR_IS_OK(error1)) {
+			DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
+			win_errstr(error1)));
+			talloc_free(mem_ctx);
+			return error1;
+		}
+		reg_generate_diff_key(t1, t2, tmppath, callbacks, callback_data);
+
+		talloc_free(tmppath);
+	}
+
+	if (newkey != NULL) {
+		error = reg_key_get_info(mem_ctx, newkey, NULL,
+					 &new_num_subkeys, &new_num_values,
+					 NULL, NULL, NULL, NULL);
+		if (!W_ERROR_IS_OK(error)) {
+			DEBUG(0, ("Error occurred while getting key info: %s\n",
+				win_errstr(error)));
+			talloc_free(mem_ctx);
+			return error;
+		}
+	} else {
+		new_num_subkeys = 0;
+		new_num_values = 0;
+	}
+
+	/* Subkeys that were added */
+	for(i = 0; i < new_num_subkeys; i++) {
+		error1 = reg_key_get_subkey_by_index(mem_ctx, newkey, i,
+						     &keyname1, NULL, NULL);
+		if (!W_ERROR_IS_OK(error1)) {
+			DEBUG(0, ("Error occurred while getting subkey by index: %s\n",
+				win_errstr(error1)));
+			talloc_free(mem_ctx);
+			return error1;
+		}
+
+		if (oldkey != NULL) {
+			error2 = reg_open_key(mem_ctx, oldkey, keyname1, &t1);
+
+			if (W_ERROR_IS_OK(error2))
+				continue;
+		} else {
+			error2 = WERR_FILE_NOT_FOUND;
+			t1 = NULL;
+		}
+
+		if (!W_ERROR_EQUAL(error2, WERR_FILE_NOT_FOUND)) {
+			DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
+				win_errstr(error2)));
+			talloc_free(mem_ctx);
+			return error2;
+		}
+
+		/* oldkey didn't have such a subkey, add a add diff */
+		tmppath = talloc_asprintf(mem_ctx, "%s\\%s", path, keyname1);
+		if (tmppath == NULL) {
+			DEBUG(0, ("Out of memory\n"));
+			talloc_free(mem_ctx);
+			return WERR_NOT_ENOUGH_MEMORY;
+		}
+		callbacks->add_key(callback_data, tmppath);
+
+		/* perform here also the recursive invocation */
+		error1 = reg_open_key(mem_ctx, newkey, keyname1, &t2);
+		if (!W_ERROR_IS_OK(error1)) {
+			DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
+			win_errstr(error1)));
+			talloc_free(mem_ctx);
+			return error1;
+		}
+		reg_generate_diff_key(t1, t2, tmppath, callbacks, callback_data);
+
+		talloc_free(tmppath);
+	}
+
+	/* Values that were added or changed */
+	for(i = 0; i < new_num_values; i++) {
+		const char *name;
+		uint32_t type1, type2;
+		DATA_BLOB contents1 = { NULL, 0 }, contents2 = { NULL, 0 };
+
+		error1 = reg_key_get_value_by_index(mem_ctx, newkey, i,
+						    &name, &type1, &contents1);
+		if (!W_ERROR_IS_OK(error1)) {
+			DEBUG(0, ("Unable to get value by index: %s\n",
+				win_errstr(error1)));
+			talloc_free(mem_ctx);
+			return error1;
+		}
+
+		if (oldkey != NULL) {
+			error2 = reg_key_get_value_by_name(mem_ctx, oldkey,
+							   name, &type2,
+							   &contents2);
+		} else
+			error2 = WERR_FILE_NOT_FOUND;
+
+		if (!W_ERROR_IS_OK(error2)
+			&& !W_ERROR_EQUAL(error2, WERR_FILE_NOT_FOUND)) {
+			DEBUG(0, ("Error occurred while getting value by name: %s\n",
+				win_errstr(error2)));
+			talloc_free(mem_ctx);
+			return error2;
+		}
+
+		if (W_ERROR_IS_OK(error2)
+		    && (data_blob_cmp(&contents1, &contents2) == 0)
+		    && (type1 == type2)) {
+			talloc_free(discard_const_p(char, name));
+			talloc_free(contents1.data);
+			talloc_free(contents2.data);
+			continue;
+		}
+
+		callbacks->set_value(callback_data, path, name,
+				     type1, contents1);
+
+		talloc_free(discard_const_p(char, name));
+		talloc_free(contents1.data);
+		talloc_free(contents2.data);
+	}
+
+	/* Values that were deleted */
+	for (i = 0; i < old_num_values; i++) {
+		const char *name;
+		uint32_t type;
+		DATA_BLOB contents = { NULL, 0 };
+
+		error1 = reg_key_get_value_by_index(mem_ctx, oldkey, i, &name,
+						    &type, &contents);
+		if (!W_ERROR_IS_OK(error1)) {
+			DEBUG(0, ("Unable to get value by index: %s\n",
+				win_errstr(error1)));
+			talloc_free(mem_ctx);
+			return error1;
+		}
+
+		if (newkey != NULL)
+			error2 = reg_key_get_value_by_name(mem_ctx, newkey,
+				 name, &type, &contents);
+		else
+			error2 = WERR_FILE_NOT_FOUND;
+
+		if (W_ERROR_IS_OK(error2)) {
+			talloc_free(discard_const_p(char, name));
+			talloc_free(contents.data);
+			continue;
+		}
+
+		if (!W_ERROR_EQUAL(error2, WERR_FILE_NOT_FOUND)) {
+			DEBUG(0, ("Error occurred while getting value by name: %s\n",
+				win_errstr(error2)));
+			talloc_free(mem_ctx);
+			return error2;
+		}
+
+		callbacks->del_value(callback_data, path, name);
+
+		talloc_free(discard_const_p(char, name));
+		talloc_free(contents.data);
+	}
+
+	talloc_free(mem_ctx);
+	return WERR_OK;
+}
+
+/**
+ * Generate diff between two registry contexts
+ */
+_PUBLIC_ WERROR reg_generate_diff(struct registry_context *ctx1,
+				  struct registry_context *ctx2,
+				  const struct reg_diff_callbacks *callbacks,
+				  void *callback_data)
+{
+	unsigned int i;
+	WERROR error;
+
+	for (i = 0; reg_predefined_keys[i].name; i++) {
+		struct registry_key *r1 = NULL, *r2 = NULL;
+
+		error = reg_get_predefined_key(ctx1,
+			reg_predefined_keys[i].handle, &r1);
+		if (!W_ERROR_IS_OK(error) &&
+		    !W_ERROR_EQUAL(error, WERR_FILE_NOT_FOUND)) {
+			DEBUG(0, ("Unable to open hive %s for backend 1\n",
+				reg_predefined_keys[i].name));
+			continue;
+		}
+
+		error = reg_get_predefined_key(ctx2,
+			reg_predefined_keys[i].handle, &r2);
+		if (!W_ERROR_IS_OK(error) &&
+		    !W_ERROR_EQUAL(error, WERR_FILE_NOT_FOUND)) {
+			DEBUG(0, ("Unable to open hive %s for backend 2\n",
+				reg_predefined_keys[i].name));
+			continue;
+		}
+
+		/* if "r1" is NULL (old hive) and "r2" isn't (new hive) then
+		 * the hive doesn't exist yet and we have to generate an add
+		 * diff */
+		if ((r1 == NULL) && (r2 != NULL)) {
+			callbacks->add_key(callback_data,
+					   reg_predefined_keys[i].name);
+		}
+		/* if "r1" isn't NULL (old hive) and "r2" is (new hive) then
+		 * the hive shouldn't exist anymore and we have to generate a
+		 * del diff */
+		if ((r1 != NULL) && (r2 == NULL)) {
+			callbacks->del_key(callback_data,
+					   reg_predefined_keys[i].name);
+		}
+
+		error = reg_generate_diff_key(r1, r2,
+			reg_predefined_keys[i].name, callbacks,
+			callback_data);
+		if (!W_ERROR_IS_OK(error)) {
+			DEBUG(0, ("Unable to determine diff: %s\n",
+				win_errstr(error)));
+			return error;
+		}
+	}
+	if (callbacks->done != NULL) {
+		callbacks->done(callback_data);
+	}
+	return WERR_OK;
+}
+
+/**
+ * Load diff file
+ */
+_PUBLIC_ WERROR reg_diff_load(const char *filename,
+			      const struct reg_diff_callbacks *callbacks,
+			      void *callback_data)
+{
+	int fd;
+	char hdr[4];
+
+	fd = open(filename, O_RDONLY, 0);
+	if (fd == -1) {
+		DEBUG(0, ("Error opening registry patch file `%s'\n",
+			filename));
+		return WERR_GEN_FAILURE;
+	}
+
+	if (read(fd, &hdr, 4) != 4) {
+		DEBUG(0, ("Error reading registry patch file `%s'\n",
+			filename));
+		close(fd);
+		return WERR_GEN_FAILURE;
+	}
+
+	/* Reset position in file */
+	lseek(fd, 0, SEEK_SET);
+#if 0 /* These backends are not supported yet. */
+	if (strncmp(hdr, "CREG", 4) == 0) {
+		/* Must be a W9x CREG Config.pol file */
+		return reg_creg_diff_load(diff, fd);
+	} else if (strncmp(hdr, "regf", 4) == 0) {
+		/* Must be a REGF NTConfig.pol file */
+		return reg_regf_diff_load(diff, fd);
+	} else
+#endif
+	if (strncmp(hdr, "PReg", 4) == 0) {
+		/* Must be a GPO Registry.pol file */
+		return reg_preg_diff_load(fd, callbacks, callback_data);
+	} else {
+		/* Must be a normal .REG file */
+		return reg_dotreg_diff_load(fd, callbacks, callback_data);
+	}
+}
+
+/**
+ * The reg_diff_apply functions
+ */
+static WERROR reg_diff_apply_add_key(void *_ctx, const char *key_name)
+{
+	struct registry_context *ctx = (struct registry_context *)_ctx;
+	struct registry_key *tmp;
+	char *buf, *buf_ptr;
+	WERROR error;
+
+	/* Recursively create the path */
+	buf = talloc_strdup(ctx, key_name);
+	W_ERROR_HAVE_NO_MEMORY(buf);
+	buf_ptr = buf;
+
+	while (*buf_ptr++ != '\0' ) {
+		if (*buf_ptr == '\\') {
+			*buf_ptr = '\0';
+			error = reg_key_add_abs(ctx, ctx, buf, 0, NULL, &tmp);
+
+			if (!W_ERROR_EQUAL(error, WERR_ALREADY_EXISTS) &&
+				    !W_ERROR_IS_OK(error)) {
+				DEBUG(0, ("Error adding new key '%s': %s\n",
+					key_name, win_errstr(error)));
+				return error;
+			}
+			*buf_ptr++ = '\\';
+			talloc_free(tmp);
+		}
+	}
+
+	talloc_free(buf);
+
+	/* Add the key */
+	error = reg_key_add_abs(ctx, ctx, key_name, 0, NULL, &tmp);
+
+	if (!W_ERROR_EQUAL(error, WERR_ALREADY_EXISTS) &&
+		    !W_ERROR_IS_OK(error)) {
+		DEBUG(0, ("Error adding new key '%s': %s\n",
+			key_name, win_errstr(error)));
+		return error;
+	}
+	talloc_free(tmp);
+
+	return WERR_OK;
+}
+
+static WERROR reg_diff_apply_del_key(void *_ctx, const char *key_name)
+{
+	struct registry_context *ctx = (struct registry_context *)_ctx;
+
+	/* We can't proof here for success, because a common superkey could */
+	/* have been deleted before the subkey's (diff order). This removed */
+	/* therefore all children recursively and the "WERR_FILE_NOT_FOUND" result is */
+	/* expected. */
+
+	reg_key_del_abs(ctx, key_name);
+
+	return WERR_OK;
+}
+
+static WERROR reg_diff_apply_set_value(void *_ctx, const char *path,
+				       const char *value_name,
+				       uint32_t value_type, DATA_BLOB value)
+{
+	struct registry_context *ctx = (struct registry_context *)_ctx;
+	struct registry_key *tmp;
+	WERROR error;
+
+	/* Open key */
+	error = reg_open_key_abs(ctx, ctx, path, &tmp);
+
+	if (W_ERROR_EQUAL(error, WERR_FILE_NOT_FOUND)) {
+		DEBUG(0, ("Error opening key '%s'\n", path));
+		return error;
+	}
+
+	/* Set value */
+	error = reg_val_set(tmp, value_name,
+				 value_type, value);
+	if (!W_ERROR_IS_OK(error)) {
+		DEBUG(0, ("Error setting value '%s'\n", value_name));
+		return error;
+	}
+
+	talloc_free(tmp);
+
+	return WERR_OK;
+}
+
+static WERROR reg_diff_apply_del_value(void *_ctx, const char *key_name,
+				       const char *value_name)
+{
+	struct registry_context *ctx = (struct registry_context *)_ctx;
+	struct registry_key *tmp;
+	WERROR error;
+
+	/* Open key */
+	error = reg_open_key_abs(ctx, ctx, key_name, &tmp);
+
+	if (!W_ERROR_IS_OK(error)) {
+		DEBUG(0, ("Error opening key '%s'\n", key_name));
+		return error;
+	}
+
+	error = reg_del_value(ctx, tmp, value_name);
+	if (!W_ERROR_IS_OK(error)) {
+		DEBUG(0, ("Error deleting value '%s'\n", value_name));
+		return error;
+	}
+
+	talloc_free(tmp);
+
+	return WERR_OK;
+}
+
+static WERROR reg_diff_apply_del_all_values(void *_ctx, const char *key_name)
+{
+	struct registry_context *ctx = (struct registry_context *)_ctx;
+	struct registry_key *key;
+	WERROR error;
+	const char *value_name;
+
+	error = reg_open_key_abs(ctx, ctx, key_name, &key);
+
+	if (!W_ERROR_IS_OK(error)) {
+		DEBUG(0, ("Error opening key '%s'\n", key_name));
+		return error;
+	}
+
+	W_ERROR_NOT_OK_RETURN(reg_key_get_info(ctx, key, NULL,
+			       NULL, NULL, NULL, NULL, NULL, NULL));
+
+	while (W_ERROR_IS_OK(reg_key_get_value_by_index(
+			ctx, key, 0, &value_name, NULL, NULL))) {
+		error = reg_del_value(ctx, key, value_name);
+		if (!W_ERROR_IS_OK(error)) {
+			DEBUG(0, ("Error deleting value '%s'\n", value_name));
+			return error;
+		}
+		talloc_free(discard_const_p(char, value_name));
+	}
+
+	talloc_free(key);
+
+	return WERR_OK;
+}
+
+/**
+ * Apply diff to a registry context
+ */
+_PUBLIC_ WERROR reg_diff_apply(struct registry_context *ctx, 
+							   const char *filename)
+{
+	struct reg_diff_callbacks callbacks;
+
+	callbacks.add_key = reg_diff_apply_add_key;
+	callbacks.del_key = reg_diff_apply_del_key;
+	callbacks.set_value = reg_diff_apply_set_value;
+	callbacks.del_value = reg_diff_apply_del_value;
+	callbacks.del_all_values = reg_diff_apply_del_all_values;
+	callbacks.done = NULL;
+
+	return reg_diff_load(filename, &callbacks, ctx);
+}