mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-16 12:30:13 +01:00
216 lines
7.2 KiB
C
216 lines
7.2 KiB
C
/* tlsprf.c - TLS Pseudo Random Function (PRF) implementation
|
|
*
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is the Netscape security libraries.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1994-2000
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
/* $Id: tlsprf.c,v 1.6 2005/08/06 09:27:28 nelsonb%netscape.com Exp $ */
|
|
|
|
#include "pkcs11i.h"
|
|
#include "blapi.h"
|
|
|
|
#define SFTK_OFFSETOF(str, memb) ((PRPtrdiff)(&(((str *)0)->memb)))
|
|
|
|
static void sftk_TLSPRFNull(void *data, PRBool freeit)
|
|
{
|
|
return;
|
|
}
|
|
|
|
typedef struct {
|
|
PRUint32 cxSize; /* size of allocated block, in bytes. */
|
|
PRUint32 cxBufSize; /* sizeof buffer at cxBufPtr. */
|
|
unsigned char *cxBufPtr; /* points to real buffer, may be cxBuf. */
|
|
PRUint32 cxKeyLen; /* bytes of cxBufPtr containing key. */
|
|
PRUint32 cxDataLen; /* bytes of cxBufPtr containing data. */
|
|
SECStatus cxRv; /* records failure of void functions. */
|
|
PRBool cxIsFIPS; /* true if conforming to FIPS 198. */
|
|
unsigned char cxBuf[512]; /* actual size may be larger than 512. */
|
|
} TLSPRFContext;
|
|
|
|
static void
|
|
sftk_TLSPRFHashUpdate(TLSPRFContext *cx, const unsigned char *data,
|
|
unsigned int data_len)
|
|
{
|
|
PRUint32 bytesUsed = cx->cxKeyLen + cx->cxDataLen;
|
|
|
|
if (cx->cxRv != SECSuccess) /* function has previously failed. */
|
|
return;
|
|
if (bytesUsed + data_len > cx->cxBufSize) {
|
|
/* We don't use realloc here because
|
|
** (a) realloc doesn't zero out the old block, and
|
|
** (b) if realloc fails, we lose the old block.
|
|
*/
|
|
PRUint32 newBufSize = bytesUsed + data_len + 512;
|
|
unsigned char * newBuf = (unsigned char *)PORT_Alloc(newBufSize);
|
|
if (!newBuf) {
|
|
cx->cxRv = SECFailure;
|
|
return;
|
|
}
|
|
PORT_Memcpy(newBuf, cx->cxBufPtr, bytesUsed);
|
|
if (cx->cxBufPtr != cx->cxBuf) {
|
|
PORT_ZFree(cx->cxBufPtr, bytesUsed);
|
|
}
|
|
cx->cxBufPtr = newBuf;
|
|
cx->cxBufSize = newBufSize;
|
|
}
|
|
PORT_Memcpy(cx->cxBufPtr + bytesUsed, data, data_len);
|
|
cx->cxDataLen += data_len;
|
|
}
|
|
|
|
static void
|
|
sftk_TLSPRFEnd(TLSPRFContext *ctx, unsigned char *hashout,
|
|
unsigned int *pDigestLen, unsigned int maxDigestLen)
|
|
{
|
|
*pDigestLen = 0; /* tells Verify that no data has been input yet. */
|
|
}
|
|
|
|
/* Compute the PRF values from the data previously input. */
|
|
static SECStatus
|
|
sftk_TLSPRFUpdate(TLSPRFContext *cx,
|
|
unsigned char *sig, /* output goes here. */
|
|
unsigned int * sigLen, /* how much output. */
|
|
unsigned int maxLen, /* output buffer size */
|
|
unsigned char *hash, /* unused. */
|
|
unsigned int hashLen) /* unused. */
|
|
{
|
|
SECStatus rv;
|
|
SECItem sigItem;
|
|
SECItem seedItem;
|
|
SECItem secretItem;
|
|
|
|
if (cx->cxRv != SECSuccess)
|
|
return cx->cxRv;
|
|
|
|
secretItem.data = cx->cxBufPtr;
|
|
secretItem.len = cx->cxKeyLen;
|
|
|
|
seedItem.data = cx->cxBufPtr + cx->cxKeyLen;
|
|
seedItem.len = cx->cxDataLen;
|
|
|
|
sigItem.data = sig;
|
|
sigItem.len = maxLen;
|
|
|
|
rv = TLS_PRF(&secretItem, NULL, &seedItem, &sigItem, cx->cxIsFIPS);
|
|
if (rv == SECSuccess && sigLen != NULL)
|
|
*sigLen = sigItem.len;
|
|
return rv;
|
|
|
|
}
|
|
|
|
static SECStatus
|
|
sftk_TLSPRFVerify(TLSPRFContext *cx,
|
|
unsigned char *sig, /* input, for comparison. */
|
|
unsigned int sigLen, /* length of sig. */
|
|
unsigned char *hash, /* data to be verified. */
|
|
unsigned int hashLen) /* size of hash data. */
|
|
{
|
|
unsigned char * tmp = (unsigned char *)PORT_Alloc(sigLen);
|
|
unsigned int tmpLen = sigLen;
|
|
SECStatus rv;
|
|
|
|
if (!tmp)
|
|
return SECFailure;
|
|
if (hashLen) {
|
|
/* hashLen is non-zero when the user does a one-step verify.
|
|
** In this case, none of the data has been input yet.
|
|
*/
|
|
sftk_TLSPRFHashUpdate(cx, hash, hashLen);
|
|
}
|
|
rv = sftk_TLSPRFUpdate(cx, tmp, &tmpLen, sigLen, NULL, 0);
|
|
if (rv == SECSuccess) {
|
|
rv = (SECStatus)(1 - !PORT_Memcmp(tmp, sig, sigLen));
|
|
}
|
|
PORT_ZFree(tmp, sigLen);
|
|
return rv;
|
|
}
|
|
|
|
static void
|
|
sftk_TLSPRFHashDestroy(TLSPRFContext *cx, PRBool freeit)
|
|
{
|
|
if (freeit) {
|
|
if (cx->cxBufPtr != cx->cxBuf)
|
|
PORT_ZFree(cx->cxBufPtr, cx->cxBufSize);
|
|
PORT_ZFree(cx, cx->cxSize);
|
|
}
|
|
}
|
|
|
|
CK_RV
|
|
sftk_TLSPRFInit(SFTKSessionContext *context,
|
|
SFTKObject * key,
|
|
CK_KEY_TYPE key_type)
|
|
{
|
|
SFTKAttribute * keyVal;
|
|
TLSPRFContext * prf_cx;
|
|
CK_RV crv = CKR_HOST_MEMORY;
|
|
PRUint32 keySize;
|
|
PRUint32 blockSize;
|
|
|
|
if (key_type != CKK_GENERIC_SECRET)
|
|
return CKR_KEY_TYPE_INCONSISTENT; /* CKR_KEY_FUNCTION_NOT_PERMITTED */
|
|
|
|
context->multi = PR_TRUE;
|
|
|
|
keyVal = sftk_FindAttribute(key, CKA_VALUE);
|
|
keySize = (!keyVal) ? 0 : keyVal->attrib.ulValueLen;
|
|
blockSize = keySize + sizeof(TLSPRFContext);
|
|
prf_cx = (TLSPRFContext *)PORT_Alloc(blockSize);
|
|
if (!prf_cx)
|
|
goto done;
|
|
prf_cx->cxSize = blockSize;
|
|
prf_cx->cxKeyLen = keySize;
|
|
prf_cx->cxDataLen = 0;
|
|
prf_cx->cxBufSize = blockSize - SFTK_OFFSETOF(TLSPRFContext, cxBuf);
|
|
prf_cx->cxRv = SECSuccess;
|
|
prf_cx->cxIsFIPS = (key->slot->slotID == FIPS_SLOT_ID);
|
|
prf_cx->cxBufPtr = prf_cx->cxBuf;
|
|
if (keySize)
|
|
PORT_Memcpy(prf_cx->cxBufPtr, keyVal->attrib.pValue, keySize);
|
|
|
|
context->hashInfo = (void *) prf_cx;
|
|
context->cipherInfo = (void *) prf_cx;
|
|
context->hashUpdate = (SFTKHash) sftk_TLSPRFHashUpdate;
|
|
context->end = (SFTKEnd) sftk_TLSPRFEnd;
|
|
context->update = (SFTKCipher) sftk_TLSPRFUpdate;
|
|
context->verify = (SFTKVerify) sftk_TLSPRFVerify;
|
|
context->destroy = (SFTKDestroy) sftk_TLSPRFNull;
|
|
context->hashdestroy = (SFTKDestroy) sftk_TLSPRFHashDestroy;
|
|
crv = CKR_OK;
|
|
|
|
done:
|
|
if (keyVal)
|
|
sftk_FreeAttribute(keyVal);
|
|
return crv;
|
|
}
|
|
|