mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-11 02:10:17 +01:00
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
#include "blapit.h"
|
|
#include "secport.h"
|
|
#include "secerr.h"
|
|
|
|
/*
|
|
* Prepare a buffer for any padded CBC encryption algorithm, growing to the
|
|
* appropriate boundary and filling with the appropriate padding.
|
|
* blockSize must be a power of 2.
|
|
*
|
|
* NOTE: If arena is non-NULL, we re-allocate from there, otherwise
|
|
* we assume (and use) XP memory (re)allocation.
|
|
*/
|
|
unsigned char *
|
|
CBC_PadBuffer(PLArenaPool *arena, unsigned char *inbuf, unsigned int inlen,
|
|
unsigned int *outlen, int blockSize)
|
|
{
|
|
unsigned char *outbuf;
|
|
unsigned int des_len;
|
|
unsigned int i;
|
|
unsigned char des_pad_len;
|
|
|
|
/*
|
|
* We need from 1 to blockSize bytes -- we *always* grow.
|
|
* The extra bytes contain the value of the length of the padding:
|
|
* if we have 2 bytes of padding, then the padding is "0x02, 0x02".
|
|
*/
|
|
des_len = (inlen + blockSize) & ~(blockSize - 1);
|
|
|
|
if (arena != NULL) {
|
|
outbuf = (unsigned char*)PORT_ArenaGrow (arena, inbuf, inlen, des_len);
|
|
} else {
|
|
outbuf = (unsigned char*)PORT_Realloc (inbuf, des_len);
|
|
}
|
|
|
|
if (outbuf == NULL) {
|
|
PORT_SetError (SEC_ERROR_NO_MEMORY);
|
|
return NULL;
|
|
}
|
|
|
|
des_pad_len = des_len - inlen;
|
|
for (i = inlen; i < des_len; i++)
|
|
outbuf[i] = des_pad_len;
|
|
|
|
*outlen = des_len;
|
|
return outbuf;
|
|
}
|