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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/crypto/nss/hash_provider/hash_gen.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 "crypto_int.h"
#include "sechash.h"
#include "nss_gen.h"
krb5_error_code
k5_nss_gen_hash(HASH_HashType hashType, const krb5_crypto_iov *data,
size_t num_data, krb5_data *output)
{
unsigned int i;
HASHContext *ctx;
krb5_error_code ret;
ret = k5_nss_init();
if (ret)
return ret;
if (output->length != HASH_ResultLen(hashType))
return KRB5_CRYPTO_INTERNAL;
ctx = HASH_Create(hashType);
if (!ctx)
return ENOMEM;
HASH_Begin(ctx);
for (i=0; i < num_data; i++) {
const krb5_crypto_iov *iov = &data[i];
if (iov->data.length && SIGN_IOV(iov)) {
HASH_Update(ctx, (unsigned char *) iov->data.data,
iov->data.length);
}
}
HASH_End(ctx, (unsigned char *)output->data,
&output->length, output->length);
HASH_Destroy(ctx);
return 0;
}
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