summaryrefslogtreecommitdiff
path: root/source3/lib
diff options
context:
space:
mode:
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/util_ea.c126
-rw-r--r--source3/lib/util_ea.h36
2 files changed, 162 insertions, 0 deletions
diff --git a/source3/lib/util_ea.c b/source3/lib/util_ea.c
new file mode 100644
index 0000000000..81684da4cb
--- /dev/null
+++ b/source3/lib/util_ea.c
@@ -0,0 +1,126 @@
+/*
+ Unix SMB/CIFS implementation.
+ SMB Extended attribute buffer handling
+ Copyright (C) Jeremy Allison 2005-2013
+ Copyright (C) Tim Prouty 2008
+
+ 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/util_ea.h"
+
+/****************************************************************************
+ Read one EA list entry from the buffer.
+****************************************************************************/
+
+struct ea_list *read_ea_list_entry(TALLOC_CTX *ctx, const char *pdata, size_t data_size, size_t *pbytes_used)
+{
+ struct ea_list *eal = talloc_zero(ctx, struct ea_list);
+ uint16 val_len;
+ unsigned int namelen;
+ size_t converted_size;
+
+ if (!eal) {
+ return NULL;
+ }
+
+ if (data_size < 6) {
+ return NULL;
+ }
+
+ eal->ea.flags = CVAL(pdata,0);
+ namelen = CVAL(pdata,1);
+ val_len = SVAL(pdata,2);
+
+ if (4 + namelen + 1 + val_len > data_size) {
+ return NULL;
+ }
+
+ /* Ensure the name is null terminated. */
+ if (pdata[namelen + 4] != '\0') {
+ return NULL;
+ }
+ if (!pull_ascii_talloc(ctx, &eal->ea.name, pdata + 4, &converted_size)) {
+ DEBUG(0,("read_ea_list_entry: pull_ascii_talloc failed: %s",
+ strerror(errno)));
+ }
+ if (!eal->ea.name) {
+ return NULL;
+ }
+
+ eal->ea.value = data_blob_talloc(eal, NULL, (size_t)val_len + 1);
+ if (!eal->ea.value.data) {
+ return NULL;
+ }
+
+ memcpy(eal->ea.value.data, pdata + 4 + namelen + 1, val_len);
+
+ /* Ensure we're null terminated just in case we print the value. */
+ eal->ea.value.data[val_len] = '\0';
+ /* But don't count the null. */
+ eal->ea.value.length--;
+
+ if (pbytes_used) {
+ *pbytes_used = 4 + namelen + 1 + val_len;
+ }
+
+ DEBUG(10,("read_ea_list_entry: read ea name %s\n", eal->ea.name));
+ dump_data(10, eal->ea.value.data, eal->ea.value.length);
+
+ return eal;
+}
+
+/****************************************************************************
+ Read a list of EA names and data from an incoming data buffer. Create an ea_list with them.
+****************************************************************************/
+
+struct ea_list *read_nttrans_ea_list(TALLOC_CTX *ctx, const char *pdata, size_t data_size)
+{
+ struct ea_list *ea_list_head = NULL;
+ size_t offset = 0;
+
+ if (data_size < 4) {
+ return NULL;
+ }
+
+ while (offset + 4 <= data_size) {
+ size_t next_offset = IVAL(pdata,offset);
+ struct ea_list *eal = read_ea_list_entry(ctx, pdata + offset + 4, data_size - offset - 4, NULL);
+
+ if (!eal) {
+ return NULL;
+ }
+
+ DLIST_ADD_END(ea_list_head, eal, struct ea_list *);
+ if (next_offset == 0) {
+ break;
+ }
+
+ /* Integer wrap protection for the increment. */
+ if (offset + next_offset < offset) {
+ break;
+ }
+
+ offset += next_offset;
+
+ /* Integer wrap protection for while loop. */
+ if (offset + 4 < offset) {
+ break;
+ }
+
+ }
+
+ return ea_list_head;
+}
diff --git a/source3/lib/util_ea.h b/source3/lib/util_ea.h
new file mode 100644
index 0000000000..54423ac287
--- /dev/null
+++ b/source3/lib/util_ea.h
@@ -0,0 +1,36 @@
+/*
+ Unix SMB/CIFS implementation.
+ SMB Extended attribute buffer handling
+ Copyright (C) Jeremy Allison 2005-2013
+ Copyright (C) Tim Prouty 2008
+
+ 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/>.
+*/
+
+#ifndef __LIB_UTIL_EA_H__
+#define __LIB_UTIL_EA_H__
+
+/****************************************************************************
+ Read one EA list entry from a buffer.
+****************************************************************************/
+
+struct ea_list *read_ea_list_entry(TALLOC_CTX *ctx, const char *pdata, size_t data_size, size_t *pbytes_used);
+
+/****************************************************************************
+ Read a list of EA names and data from an incoming data buffer. Create an ea_list with them.
+****************************************************************************/
+
+struct ea_list *read_nttrans_ea_list(TALLOC_CTX *ctx, const char *pdata, size_t data_size);
+
+#endif /* __LIB_UTIL_EA_H__ */