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/*
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 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"
const DATA_BLOB data_blob_null = { NULL, 0, NULL };
/*******************************************************************
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 = (uint8 *)smb_xmemdup(p, length);
} else {
ret.data = SMB_XMALLOC_ARRAY(uint8, 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) {
ZERO_STRUCT(ret);
return ret;
}
if (p) {
ret.data = (uint8 *)TALLOC_MEMDUP(mem_ctx, p, length);
if (ret.data == NULL)
smb_panic("data_blob_talloc: TALLOC_MEMDUP failed");
} else {
ret.data = (uint8 *)TALLOC(mem_ctx, length);
if (ret.data == NULL)
smb_panic("data_blob_talloc: TALLOC failed");
}
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);
}
/**
useful for constructing data blobs in test suites, while
avoiding const warnings
**/
DATA_BLOB data_blob_string_const(const char *str)
{
DATA_BLOB blob;
blob.data = CONST_DISCARD(uint8 *, str);
blob.length = strlen(str) + 1;
blob.free = NULL;
return blob;
}
/**
* Create a new data blob from const data
*/
DATA_BLOB data_blob_const(const void *p, size_t length)
{
DATA_BLOB blob;
blob.data = CONST_DISCARD(uint8 *, p);
blob.length = length;
blob.free = NULL;
return blob;
}
/**
construct a zero data blob, using supplied TALLOC_CTX.
use this sparingly as it initialises data - better to initialise
yourself if you want specific data in the blob
**/
DATA_BLOB data_blob_talloc_zero(TALLOC_CTX *mem_ctx, size_t length)
{
DATA_BLOB blob = data_blob_talloc(mem_ctx, NULL, length);
data_blob_clear(&blob);
return blob;
}
/**
print the data_blob as hex string
**/
_PUBLIC_ char *data_blob_hex_string(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob)
{
int i;
char *hex_string;
hex_string = talloc_array(mem_ctx, char, (blob->length*2)+1);
if (!hex_string) {
return NULL;
}
for (i = 0; i < blob->length; i++)
slprintf(&hex_string[i*2], 3, "%02X", blob->data[i]);
hex_string[(blob->length*2)] = '\0';
return hex_string;
}
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