Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/softoken/padbuf.c @ 2:a945361df361

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Fix NSS_LIBRARIES variable
author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 30 Jul 2014 16:20:44 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4 #include "blapit.h"
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5 #include "secport.h"
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6 #include "secerr.h"
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7
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8 /*
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9 * Prepare a buffer for any padded CBC encryption algorithm, growing to the
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10 * appropriate boundary and filling with the appropriate padding.
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11 * blockSize must be a power of 2.
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12 *
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13 * NOTE: If arena is non-NULL, we re-allocate from there, otherwise
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14 * we assume (and use) XP memory (re)allocation.
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15 */
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16 unsigned char *
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17 CBC_PadBuffer(PLArenaPool *arena, unsigned char *inbuf, unsigned int inlen,
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18 unsigned int *outlen, int blockSize)
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19 {
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20 unsigned char *outbuf;
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21 unsigned int des_len;
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22 unsigned int i;
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23 unsigned char des_pad_len;
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24
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25 /*
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26 * We need from 1 to blockSize bytes -- we *always* grow.
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27 * The extra bytes contain the value of the length of the padding:
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28 * if we have 2 bytes of padding, then the padding is "0x02, 0x02".
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29 */
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30 des_len = (inlen + blockSize) & ~(blockSize - 1);
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31
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32 if (arena != NULL) {
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33 outbuf = (unsigned char*)PORT_ArenaGrow (arena, inbuf, inlen, des_len);
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34 } else {
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35 outbuf = (unsigned char*)PORT_Realloc (inbuf, des_len);
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36 }
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37
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38 if (outbuf == NULL) {
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39 PORT_SetError (SEC_ERROR_NO_MEMORY);
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40 return NULL;
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41 }
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42
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43 des_pad_len = des_len - inlen;
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44 for (i = inlen; i < des_len; i++)
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45 outbuf[i] = des_pad_len;
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46
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47 *outlen = des_len;
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48 return outbuf;
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49 }
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