Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

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

1 files changed, 212 insertions, 0 deletions

diff --git a/libcli/smb/reparse_symlink.c b/libcli/smb/reparse_symlink.c
new file mode 100644
index 0000000..04f26dc
--- /dev/null
+++ b/libcli/smb/reparse_symlink.c
@@ -0,0 +1,212 @@
+/*
+ * Unix SMB/CIFS implementation.
+ *
+ * Implementation of
+ * http://msdn.microsoft.com/en-us/library/cc232006%28v=PROT.13%29.aspx
+ *
+ * Copyright (C) Volker Lendecke 2011
+ *
+ * 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 "replace.h"
+#include "reparse_symlink.h"
+#include "lib/util/charset/charset.h"
+#include "lib/util/byteorder.h"
+#include "libcli/smb/smb_constants.h"
+#include "libcli/smb/smb_util.h"
+#include "lib/util/debug.h"
+
+bool symlink_reparse_buffer_marshall(
+	const char *substitute, const char *printname, uint32_t flags,
+	TALLOC_CTX *mem_ctx, uint8_t **pdst, size_t *pdstlen)
+{
+	uint8_t *dst = NULL;
+	size_t dst_len;
+	uint8_t *subst_utf16 = NULL;
+	uint8_t *print_utf16 = NULL;
+	size_t subst_len = 0;
+	size_t print_len = 0;
+	bool ret = false;
+	bool ok;
+
+	if (substitute == NULL) {
+		return false;
+	}
+	if (printname == NULL) {
+		printname = substitute;
+	}
+
+	ok = convert_string_talloc(
+		mem_ctx,
+		CH_UNIX,
+		CH_UTF16,
+		substitute,
+		strlen(substitute),
+		&subst_utf16,
+		&subst_len);
+	if (!ok) {
+		goto fail;
+	}
+
+	ok = convert_string_talloc(
+		mem_ctx,
+		CH_UNIX,
+		CH_UTF16,
+		printname,
+		strlen(printname),
+		&print_utf16,
+		&print_len);
+	if (!ok) {
+		goto fail;
+	}
+
+	dst_len = subst_len + 20;
+	if (dst_len < 20) {
+		goto fail;
+	}
+	dst_len += print_len;
+	if (dst_len < print_len) {
+		goto fail;
+	}
+	dst = talloc_array(mem_ctx, uint8_t, dst_len);
+	if (dst == NULL) {
+		goto fail;
+	}
+
+	SIVAL(dst, 0, IO_REPARSE_TAG_SYMLINK);	   /* ReparseTag */
+	SSVAL(dst, 4, 12 + subst_len + print_len); /* ReparseDataLength */
+	SSVAL(dst, 6, 0);			   /* Reserved */
+	SSVAL(dst, 8, 0);			   /* SubstituteNameOffset */
+	SSVAL(dst, 10, subst_len);		   /* SubstituteNameLength */
+	SSVAL(dst, 12, subst_len);		   /* PrintNameOffset */
+	SSVAL(dst, 14, print_len);		   /* PrintNameLength */
+	SIVAL(dst, 16, flags);			   /* Flags */
+
+	if ((subst_utf16 != NULL) && (subst_len != 0)) {
+		memcpy(dst + 20, subst_utf16, subst_len);
+	}
+
+	if ((print_utf16 != NULL) && (print_len != 0)) {
+		memcpy(dst + 20 + subst_len, print_utf16, print_len);
+	}
+
+	*pdst = dst;
+	*pdstlen = dst_len;
+	ret = true;
+
+fail:
+	TALLOC_FREE(subst_utf16);
+	TALLOC_FREE(print_utf16);
+	return ret;
+}
+
+struct symlink_reparse_struct *symlink_reparse_buffer_parse(
+	TALLOC_CTX *mem_ctx, const uint8_t *src, size_t srclen)
+{
+	struct symlink_reparse_struct *result = NULL;
+	uint16_t reparse_data_length;
+	uint16_t substitute_name_offset, substitute_name_length;
+	uint16_t print_name_offset, print_name_length;
+	bool ok;
+
+	if (srclen < 20) {
+		DBG_DEBUG("srclen = %zu, expected >= 20\n", srclen);
+		goto fail;
+	}
+	if (IVAL(src, 0) != IO_REPARSE_TAG_SYMLINK) {
+		DBG_DEBUG("Got ReparseTag %8.8x, expected %8.8x\n",
+			  IVAL(src, 0),
+			  IO_REPARSE_TAG_SYMLINK);
+		goto fail;
+	}
+
+	reparse_data_length	= SVAL(src, 4);
+	substitute_name_offset	= SVAL(src, 8);
+	substitute_name_length	= SVAL(src, 10);
+	print_name_offset	= SVAL(src, 12);
+	print_name_length	= SVAL(src, 14);
+
+	if (reparse_data_length < 12) {
+		DBG_DEBUG("reparse_data_length = %"PRIu16", expected >= 12\n",
+			  reparse_data_length);
+		goto fail;
+	}
+	if (smb_buffer_oob(srclen - 8, reparse_data_length, 0)) {
+		DBG_DEBUG("reparse_data_length (%"PRIu16") too large for "
+			   "src_len (%zu)\n",
+			  reparse_data_length,
+			  srclen);
+		goto fail;
+	}
+	if (smb_buffer_oob(reparse_data_length - 12, substitute_name_offset,
+			   substitute_name_length)) {
+		DBG_DEBUG("substitute_name (%"PRIu16"/%"PRIu16") does not fit "
+			  "in reparse_data_length (%"PRIu16")\n",
+			  substitute_name_offset,
+			  substitute_name_length,
+			  reparse_data_length - 12);
+		goto fail;
+	}
+	if (smb_buffer_oob(reparse_data_length - 12, print_name_offset,
+			   print_name_length)) {
+		DBG_DEBUG("print_name (%"PRIu16"/%"PRIu16") does not fit in "
+			  "reparse_data_length (%"PRIu16")\n",
+			  print_name_offset,
+			  print_name_length,
+			  reparse_data_length - 12);
+		goto fail;
+	}
+
+	result = talloc_zero(mem_ctx, struct symlink_reparse_struct);
+	if (result == NULL) {
+		DBG_DEBUG("talloc failed\n");
+		goto fail;
+	}
+
+	ok = convert_string_talloc(
+		result,
+		CH_UTF16,
+		CH_UNIX,
+		src + 20 + substitute_name_offset,
+		substitute_name_length,
+		&result->substitute_name,
+		NULL);
+	if (!ok) {
+		DBG_DEBUG("convert_string_talloc for substitute_name "
+			  "failed\n");
+		goto fail;
+	}
+
+	ok = convert_string_talloc(
+		result,
+		CH_UTF16,
+		CH_UNIX,
+		src + 20 + print_name_offset,
+		print_name_length,
+		&result->print_name,
+		NULL);
+	if (!ok) {
+		DBG_DEBUG("convert_string_talloc for print_name failed\n");
+		goto fail;
+	}
+
+	result->unparsed_path_length = SVAL(src, 6);
+	result->flags = IVAL(src, 16);
+
+	return result;
+fail:
+	TALLOC_FREE(result);
+	return NULL;
+}