2 Unix SMB/CIFS implementation.
3 Easy management of byte-length data
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Andrew Bartlett 2001
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 const DATA_BLOB data_blob_null = { NULL, 0, NULL };
25 /*******************************************************************
27 *******************************************************************/
29 static void free_data_blob(DATA_BLOB *d)
31 if ((d) && (d->free)) {
36 /*******************************************************************
37 Construct a data blob, must be freed with data_blob_free().
38 You can pass NULL for p and get a blank data blob
39 *******************************************************************/
41 DATA_BLOB data_blob(const void *p, size_t length)
51 ret.data = (uint8 *)smb_xmemdup(p, length);
53 ret.data = SMB_XMALLOC_ARRAY(uint8, length);
56 ret.free = free_data_blob;
60 /*******************************************************************
61 Construct a data blob, using supplied TALLOC_CTX.
62 *******************************************************************/
64 DATA_BLOB data_blob_talloc(TALLOC_CTX *mem_ctx, const void *p, size_t length)
74 ret.data = (uint8 *)TALLOC_MEMDUP(mem_ctx, p, length);
76 smb_panic("data_blob_talloc: TALLOC_MEMDUP failed");
78 ret.data = (uint8 *)TALLOC(mem_ctx, length);
80 smb_panic("data_blob_talloc: TALLOC failed");
88 /*******************************************************************
90 *******************************************************************/
92 void data_blob_free(DATA_BLOB *d)
102 /*******************************************************************
103 Clear a DATA_BLOB's contents
104 *******************************************************************/
106 void data_blob_clear(DATA_BLOB *d)
109 memset(d->data, 0, d->length);
113 /*******************************************************************
114 Free a data blob and clear its contents
115 *******************************************************************/
117 void data_blob_clear_free(DATA_BLOB *d)
124 useful for constructing data blobs in test suites, while
125 avoiding const warnings
127 DATA_BLOB data_blob_string_const(const char *str)
130 blob.data = CONST_DISCARD(uint8 *, str);
131 blob.length = strlen(str) + 1;
137 * Create a new data blob from const data
139 DATA_BLOB data_blob_const(const void *p, size_t length)
142 blob.data = CONST_DISCARD(uint8 *, p);
143 blob.length = length;
149 construct a zero data blob, using supplied TALLOC_CTX.
150 use this sparingly as it initialises data - better to initialise
151 yourself if you want specific data in the blob
153 DATA_BLOB data_blob_talloc_zero(TALLOC_CTX *mem_ctx, size_t length)
155 DATA_BLOB blob = data_blob_talloc(mem_ctx, NULL, length);
156 data_blob_clear(&blob);
161 print the data_blob as hex string
163 _PUBLIC_ char *data_blob_hex_string(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob)
168 hex_string = talloc_array(mem_ctx, char, (blob->length*2)+1);
173 for (i = 0; i < blob->length; i++)
174 slprintf(&hex_string[i*2], 3, "%02X", blob->data[i]);
176 hex_string[(blob->length*2)] = '\0';