/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 *************************************************************/



#include <precompiled_xmlsecurity.hxx>

#include <pk11pub.h>
#include "digestcontext.hxx"

using namespace ::com::sun::star;

ODigestContext::~ODigestContext()
{
    if ( m_pContext )
    {
        PK11_DestroyContext( m_pContext, PR_TRUE );
        m_pContext = NULL;
    }
}

void SAL_CALL ODigestContext::updateDigest( const uno::Sequence< ::sal_Int8 >& aData )
    throw (lang::DisposedException, uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_aMutex );

    if ( m_bBroken )
        throw uno::RuntimeException();

    if ( m_bDisposed )
        throw lang::DisposedException();

    if ( !m_b1KData || m_nDigested < 1024 )
    {
        uno::Sequence< sal_Int8 > aToDigest = aData;
        if ( m_b1KData && m_nDigested + aData.getLength() > 1024 )
            aToDigest.realloc( 1024 - m_nDigested );

        if ( PK11_DigestOp( m_pContext, reinterpret_cast< const unsigned char* >( aToDigest.getConstArray() ), aToDigest.getLength() ) != SECSuccess )
        {
            PK11_DestroyContext( m_pContext, PR_TRUE );
            m_pContext = NULL;
            m_bBroken = true;
            throw uno::RuntimeException();
        }

        m_nDigested += aToDigest.getLength();
    }
}

uno::Sequence< ::sal_Int8 > SAL_CALL ODigestContext::finalizeDigestAndDispose()
    throw (lang::DisposedException, uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_aMutex );

    if ( m_bBroken )
        throw uno::RuntimeException();

    if ( m_bDisposed )
        throw lang::DisposedException();

    uno::Sequence< sal_Int8 > aResult( m_nDigestLength );
    unsigned int nResultLen = 0;
    if ( PK11_DigestFinal( m_pContext, reinterpret_cast< unsigned char* >( aResult.getArray() ), &nResultLen, aResult.getLength() ) != SECSuccess )
    {
        PK11_DestroyContext( m_pContext, PR_TRUE );
        m_pContext = NULL;
        m_bBroken = true;
        throw uno::RuntimeException();
    }

    PK11_DestroyContext( m_pContext, PR_TRUE );
    m_pContext = NULL;
    m_bDisposed = true;

    aResult.realloc( nResultLen );
    return aResult;
}