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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/crypto/nss/sha1/shs.c
*
* Copyright (c) 2010 Red Hat, Inc.
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* * Neither the name of Red Hat, Inc., nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "k5-int.h"
#include "shs.h"
#include "pk11pub.h"
#include "nss_gen.h"
/* Initialize the SHS values */
void shsInit(SHS_INFO *shsInfo)
{
if (k5_nss_init()) {
shsInfo->nss_ctxt = NULL;
return;
}
shsInfo->nss_ctxt = PK11_CreateDigestContext(SEC_OID_SHA1);
if (shsInfo->nss_ctxt == NULL)
return;
PK11_DigestBegin((PK11Context *)shsInfo->nss_ctxt);
}
/* Update SHS for a block of data */
void shsUpdate(SHS_INFO *shsInfo, const SHS_BYTE *buffer, unsigned int count)
{
if (shsInfo->nss_ctxt == NULL)
return;
PK11_DigestOp((PK11Context *)shsInfo->nss_ctxt, buffer, count);
}
/* Final wrapup - pad to SHS_DATASIZE-byte boundary with the bit pattern
* 1 0* (64-bit count of bits processed, MSB-first) */
void shsFinal(SHS_INFO *shsInfo)
{
if (shsInfo->nss_ctxt == NULL)
return;
PK11_DigestFinal((PK11Context *)shsInfo->nss_ctxt, shsInfo->digestBuf,
&shsInfo->digestLen, sizeof (shsInfo->digestBuf));
/* Since there is not separate cleanup step, free the context now.
* (otherwise we could have reused the context for another MD5 operation
* in the future).
*/
PK11_DestroyContext((PK11Context *)shsInfo->nss_ctxt, PR_TRUE);
shsInfo->nss_ctxt = NULL;
}
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