From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- security/nss/lib/softoken/padbuf.c | 49 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 security/nss/lib/softoken/padbuf.c (limited to 'security/nss/lib/softoken/padbuf.c') diff --git a/security/nss/lib/softoken/padbuf.c b/security/nss/lib/softoken/padbuf.c new file mode 100644 index 000000000..6e897f213 --- /dev/null +++ b/security/nss/lib/softoken/padbuf.c @@ -0,0 +1,49 @@ +/* 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; +} -- cgit v1.2.3