74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/*
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* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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/**
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* Generate subkey, from keyblock
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*
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* @param context kerberos context
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* @param key session key
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* @param etype encryption type of subkey, if ETYPE_NULL, use key's enctype
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* @param subkey returned new, free with krb5_free_keyblock().
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*
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* @return 0 on success or a Kerberos 5 error code
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*
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* @ingroup krb5_crypto
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*/
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_generate_subkey_extended(krb5_context context,
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const krb5_keyblock *key,
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krb5_enctype etype,
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krb5_keyblock **subkey)
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{
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krb5_error_code ret;
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ALLOC(*subkey, 1);
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if (*subkey == NULL)
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return krb5_enomem(context);
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if (etype == (krb5_enctype)ETYPE_NULL)
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etype = key->keytype; /* use session key etype */
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/* XXX should we use the session key as input to the RF? */
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ret = krb5_generate_random_keyblock(context, etype, *subkey);
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if (ret != 0) {
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free(*subkey);
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*subkey = NULL;
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}
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return ret;
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}
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