mirror of
https://github.com/samba-team/samba.git
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319 lines
7.2 KiB
C
319 lines
7.2 KiB
C
/*
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* Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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*
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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 "kdc_locl.h"
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/*
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*
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*/
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void
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krb5_kdc_update_time(struct timeval *tv)
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{
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if (tv == NULL)
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gettimeofday(&_kdc_now, NULL);
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else
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_kdc_now = *tv;
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}
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static krb5_error_code
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kdc_as_req(krb5_context context,
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krb5_kdc_configuration *config,
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krb5_data *req_buffer,
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krb5_data *reply,
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const char *from,
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struct sockaddr *addr,
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int datagram_reply,
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int *claim)
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{
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krb5_error_code ret;
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KDC_REQ req;
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size_t len;
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ret = decode_AS_REQ(req_buffer->data, req_buffer->length, &req, &len);
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if (ret)
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return ret;
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*claim = 1;
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ret = _kdc_as_rep(context, config, &req, req_buffer,
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reply, from, addr, datagram_reply);
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free_AS_REQ(&req);
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return ret;
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}
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static krb5_error_code
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kdc_tgs_req(krb5_context context,
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krb5_kdc_configuration *config,
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krb5_data *req_buffer,
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krb5_data *reply,
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const char *from,
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struct sockaddr *addr,
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int datagram_reply,
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int *claim)
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{
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krb5_error_code ret;
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KDC_REQ req;
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size_t len;
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ret = decode_TGS_REQ(req_buffer->data, req_buffer->length, &req, &len);
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if (ret)
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return ret;
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*claim = 1;
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ret = _kdc_tgs_rep(context, config, &req, reply,
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from, addr, datagram_reply);
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free_TGS_REQ(&req);
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return ret;
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}
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#ifdef DIGEST
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static krb5_error_code
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kdc_digest(krb5_context context,
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krb5_kdc_configuration *config,
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krb5_data *req_buffer,
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krb5_data *reply,
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const char *from,
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struct sockaddr *addr,
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int datagram_reply,
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int *claim)
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{
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DigestREQ digestreq;
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krb5_error_code ret;
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size_t len;
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ret = decode_DigestREQ(req_buffer->data, req_buffer->length,
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&digestreq, &len);
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if (ret)
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return ret;
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*claim = 1;
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ret = _kdc_do_digest(context, config, &digestreq, reply, from, addr);
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free_DigestREQ(&digestreq);
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return ret;
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}
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#endif
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#ifdef KX509
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static krb5_error_code
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kdc_kx509(krb5_context context,
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krb5_kdc_configuration *config,
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krb5_data *req_buffer,
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krb5_data *reply,
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const char *from,
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struct sockaddr *addr,
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int datagram_reply,
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int *claim)
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{
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Kx509Request kx509req;
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krb5_error_code ret;
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size_t len;
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ret = _kdc_try_kx509_request(req_buffer->data, req_buffer->length,
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&kx509req, &len);
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if (ret)
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return ret;
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*claim = 1;
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ret = _kdc_do_kx509(context, config, &kx509req, reply, from, addr);
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free_Kx509Request(&kx509req);
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return ret;
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}
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#endif
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static struct krb5_kdc_service services[] = {
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{ KS_KRB5, kdc_as_req },
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{ KS_KRB5, kdc_tgs_req },
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#ifdef DIGEST
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{ 0, kdc_digest },
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#endif
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#ifdef KX509
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{ 0, kdc_kx509 },
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#endif
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{ 0, NULL }
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};
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/*
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* handle the request in `buf, len', from `addr' (or `from' as a string),
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* sending a reply in `reply'.
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*/
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int
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krb5_kdc_process_request(krb5_context context,
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krb5_kdc_configuration *config,
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unsigned char *buf,
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size_t len,
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krb5_data *reply,
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krb5_boolean *prependlength,
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const char *from,
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struct sockaddr *addr,
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int datagram_reply)
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{
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krb5_error_code ret;
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unsigned int i;
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krb5_data req_buffer;
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int claim = 0;
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req_buffer.data = buf;
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req_buffer.length = len;
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for (i = 0; services[i].process != NULL; i++) {
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ret = (*services[i].process)(context, config, &req_buffer,
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reply, from, addr, datagram_reply,
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&claim);
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if (claim) {
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if (services[i].flags & KS_NO_LENGTH)
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*prependlength = 0;
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return ret;
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}
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}
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return -1;
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}
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/*
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* handle the request in `buf, len', from `addr' (or `from' as a string),
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* sending a reply in `reply'.
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*
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* This only processes krb5 requests
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*/
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int
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krb5_kdc_process_krb5_request(krb5_context context,
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krb5_kdc_configuration *config,
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unsigned char *buf,
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size_t len,
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krb5_data *reply,
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const char *from,
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struct sockaddr *addr,
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int datagram_reply)
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{
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krb5_error_code ret;
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unsigned int i;
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krb5_data req_buffer;
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int claim = 0;
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req_buffer.data = buf;
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req_buffer.length = len;
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for (i = 0; services[i].process != NULL; i++) {
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if ((services[i].flags & KS_KRB5) == 0)
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continue;
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ret = (*services[i].process)(context, config, &req_buffer,
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reply, from, addr, datagram_reply,
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&claim);
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if (claim)
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return ret;
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}
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return -1;
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}
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/*
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*
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*/
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int
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krb5_kdc_save_request(krb5_context context,
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const char *fn,
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const unsigned char *buf,
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size_t len,
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const krb5_data *reply,
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const struct sockaddr *sa)
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{
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krb5_storage *sp;
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krb5_address a;
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int fd, ret;
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uint32_t t;
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krb5_data d;
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memset(&a, 0, sizeof(a));
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d.data = rk_UNCONST(buf);
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d.length = len;
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t = _kdc_now.tv_sec;
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fd = open(fn, O_WRONLY|O_CREAT|O_APPEND, 0600);
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if (fd < 0) {
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int saved_errno = errno;
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krb5_set_error_message(context, saved_errno, "Failed to open: %s", fn);
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return saved_errno;
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}
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sp = krb5_storage_from_fd(fd);
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close(fd);
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if (sp == NULL) {
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krb5_set_error_message(context, ENOMEM, "Storage failed to open fd");
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return ENOMEM;
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}
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ret = krb5_sockaddr2address(context, sa, &a);
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if (ret)
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goto out;
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krb5_store_uint32(sp, 1);
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krb5_store_uint32(sp, t);
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krb5_store_address(sp, a);
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krb5_store_data(sp, d);
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{
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Der_class cl;
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Der_type ty;
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unsigned int tag;
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ret = der_get_tag (reply->data, reply->length,
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&cl, &ty, &tag, NULL);
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if (ret) {
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krb5_store_uint32(sp, 0xffffffff);
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krb5_store_uint32(sp, 0xffffffff);
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} else {
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krb5_store_uint32(sp, MAKE_TAG(cl, ty, 0));
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krb5_store_uint32(sp, tag);
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}
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}
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krb5_free_address(context, &a);
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out:
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krb5_storage_free(sp);
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return 0;
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}
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