e7e0b34988
several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues.
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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