1 files changed, 141 insertions, 0 deletions
diff --git a/source4/lib/data_blob.c b/source4/lib/data_blob.c
new file mode 100644
index 00000000000..8e7df52bef1
--- /dev/null
+++ b/source4/lib/data_blob.c
@@ -0,0 +1,141 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Easy management of byte-length data
+   Copyright (C) Andrew Tridgell 2001
+   Copyright (C) Andrew Bartlett 2001
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/*******************************************************************
+ free() a data blob
+*******************************************************************/
+static void free_data_blob(DATA_BLOB *d)
+{
+	if ((d) && (d->free)) {
+		SAFE_FREE(d->data);
+	}
+}
+
+/*******************************************************************
+ construct a data blob, must be freed with data_blob_free()
+ you can pass NULL for p and get a blank data blob
+*******************************************************************/
+DATA_BLOB data_blob(const void *p, size_t length)
+{
+	DATA_BLOB ret;
+
+	if (!length) {
+		ZERO_STRUCT(ret);
+		return ret;
+	}
+
+	if (p) {
+		ret.data = smb_xmemdup(p, length);
+	} else {
+		ret.data = smb_xmalloc(length);
+	}
+	ret.length = length;
+	ret.free = free_data_blob;
+	return ret;
+}
+
+/*******************************************************************
+ construct a data blob, using supplied TALLOC_CTX
+*******************************************************************/
+DATA_BLOB data_blob_talloc(TALLOC_CTX *mem_ctx, const void *p, size_t length)
+{
+	DATA_BLOB ret;
+
+	if (length == 0) {
+		ZERO_STRUCT(ret);
+		return ret;
+	}
+
+	if (p == NULL) {
+		ret.data = talloc(mem_ctx, length);
+		if (ret.data == NULL) {
+			smb_panic("data_blob_talloc: talloc_memdup failed.\n");
+		}
+		ret.length = length;
+		memset(ret.data, 0, ret.length);
+		return ret;
+	}
+
+	ret.data = talloc_memdup(mem_ctx, p, length);
+	if (ret.data == NULL) {
+		smb_panic("data_blob_talloc: talloc_memdup failed.\n");
+	}
+
+	ret.length = length;
+	ret.free = NULL;
+	return ret;
+}
+
+/*******************************************************************
+free a data blob
+*******************************************************************/
+void data_blob_free(DATA_BLOB *d)
+{
+	if (d) {
+		if (d->free) {
+			(d->free)(d);
+		}
+		d->length = 0;
+	}
+}
+
+/*******************************************************************
+clear a DATA_BLOB's contents
+*******************************************************************/
+void data_blob_clear(DATA_BLOB *d)
+{
+	if (d->data) {
+		memset(d->data, 0, d->length);
+	}
+}
+
+/*******************************************************************
+free a data blob and clear its contents
+*******************************************************************/
+void data_blob_clear_free(DATA_BLOB *d)
+{
+	data_blob_clear(d);
+	data_blob_free(d);
+}
+
+
+/*******************************************************************
+check if two data blobs are equal
+*******************************************************************/
+BOOL data_blob_equal(DATA_BLOB *d1, DATA_BLOB *d2)
+{
+	if (d1->length != d2->length) {
+		return False;
+	}
+	if (d1->data == d2->data) {
+		return True;
+	}
+	if (d1->data == NULL || d2->data == NULL) {
+		return False;
+	}
+	if (memcmp(d1->data, d2->data, d1->length) == 0) {
+		return True;
+	}
+	return False;
+}
+