942a821fab
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@25171 ec53bebd-3082-4978-b11e-865c3cabbd6b
123 lines
4.0 KiB
C
123 lines
4.0 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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krb5_error_code KRB5_LIB_FUNCTION
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krb5_mk_rep(krb5_context context,
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krb5_auth_context auth_context,
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krb5_data *outbuf)
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{
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krb5_error_code ret;
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AP_REP ap;
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EncAPRepPart body;
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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_crypto crypto;
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ap.pvno = 5;
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ap.msg_type = krb_ap_rep;
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memset (&body, 0, sizeof(body));
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body.ctime = auth_context->authenticator->ctime;
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body.cusec = auth_context->authenticator->cusec;
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if (auth_context->flags & KRB5_AUTH_CONTEXT_USE_SUBKEY) {
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if (auth_context->local_subkey == NULL) {
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ret = krb5_auth_con_generatelocalsubkey(context,
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auth_context,
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auth_context->keyblock);
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if(ret) {
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free_EncAPRepPart(&body);
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return ret;
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}
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}
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ret = krb5_copy_keyblock(context, auth_context->local_subkey,
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&body.subkey);
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if (ret) {
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free_EncAPRepPart(&body);
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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} else
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body.subkey = NULL;
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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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auth_context->keyblock,
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&auth_context->local_seqnumber);
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ALLOC(body.seq_number, 1);
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if (body.seq_number == NULL) {
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krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
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free_EncAPRepPart(&body);
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return ENOMEM;
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}
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*(body.seq_number) = auth_context->local_seqnumber;
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} else
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body.seq_number = NULL;
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ap.enc_part.etype = auth_context->keyblock->keytype;
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ap.enc_part.kvno = NULL;
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ASN1_MALLOC_ENCODE(EncAPRepPart, buf, buf_size, &body, &len, ret);
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free_EncAPRepPart (&body);
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if(ret)
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return ret;
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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, auth_context->keyblock,
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0 /* ap.enc_part.etype */, &crypto);
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if (ret) {
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free (buf);
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return ret;
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}
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ret = krb5_encrypt (context,
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crypto,
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KRB5_KU_AP_REQ_ENC_PART,
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buf + buf_size - len,
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len,
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&ap.enc_part.cipher);
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krb5_crypto_destroy(context, crypto);
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free(buf);
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if (ret)
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return ret;
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ASN1_MALLOC_ENCODE(AP_REP, outbuf->data, outbuf->length, &ap, &len, ret);
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if (ret == 0 && outbuf->length != len)
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krb5_abortx(context, "internal error in ASN.1 encoder");
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free_AP_REP (&ap);
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return ret;
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}
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