79ec557a94
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@13301 ec53bebd-3082-4978-b11e-865c3cabbd6b
132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/*
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* Copyright (c) 1997 - 2003 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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RCSID("$Id$");
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krb5_error_code
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krb5_build_authenticator (krb5_context context,
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krb5_auth_context auth_context,
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krb5_enctype enctype,
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krb5_creds *cred,
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Checksum *cksum,
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Authenticator **auth_result,
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krb5_data *result,
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krb5_key_usage usage)
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{
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Authenticator *auth;
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u_char *buf = NULL;
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size_t buf_size;
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size_t len;
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krb5_error_code ret;
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krb5_crypto crypto;
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auth = malloc(sizeof(*auth));
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if (auth == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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memset (auth, 0, sizeof(*auth));
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auth->authenticator_vno = 5;
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copy_Realm(&cred->client->realm, &auth->crealm);
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copy_PrincipalName(&cred->client->name, &auth->cname);
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krb5_us_timeofday (context, &auth->ctime, &auth->cusec);
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ret = krb5_auth_con_getlocalsubkey(context, auth_context, &auth->subkey);
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if(ret)
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goto fail;
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if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
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if(auth_context->local_seqnumber == 0)
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krb5_generate_seq_number (context,
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&cred->session,
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&auth_context->local_seqnumber);
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ALLOC(auth->seq_number, 1);
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if(auth->seq_number == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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*auth->seq_number = auth_context->local_seqnumber;
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} else
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auth->seq_number = NULL;
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auth->authorization_data = NULL;
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auth->cksum = cksum;
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/* XXX - Copy more to auth_context? */
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if (auth_context) {
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auth_context->authenticator->ctime = auth->ctime;
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auth_context->authenticator->cusec = auth->cusec;
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}
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ASN1_MALLOC_ENCODE(Authenticator, buf, buf_size, auth, &len, ret);
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if (ret)
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goto fail;
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if(buf_size != len)
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krb5_abortx(context, "internal error in ASN.1 encoder");
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ret = krb5_crypto_init(context, &cred->session, enctype, &crypto);
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if (ret)
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goto fail;
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ret = krb5_encrypt (context,
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crypto,
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usage /* KRB5_KU_AP_REQ_AUTH */,
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buf + buf_size - len,
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len,
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result);
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krb5_crypto_destroy(context, crypto);
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if (ret)
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goto fail;
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free (buf);
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if (auth_result)
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*auth_result = auth;
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else {
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/* Don't free the `cksum', it's allocated by the caller */
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auth->cksum = NULL;
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free_Authenticator (auth);
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free (auth);
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}
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return ret;
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fail:
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free_Authenticator (auth);
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free (auth);
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free (buf);
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return ret;
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}
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