diff options
Diffstat (limited to 'source4/lib/data_blob.c')
| -rw-r--r-- | source4/lib/data_blob.c | 141 |
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 0000000000..8e7df52bef --- /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; +} + |