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.
233 lines
6.1 KiB
C
233 lines
6.1 KiB
C
/*
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* Copyright (c) 1997 - 2006 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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* The format seems to be:
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* client -> server
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*
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* 4 bytes - length
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* KRB5_SENDAUTH_V1.0 (including zero)
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* 4 bytes - length
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* protocol string (with terminating zero)
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*
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* server -> client
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* 1 byte - (0 = OK, else some kind of error)
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*
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* client -> server
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* 4 bytes - length
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* AP-REQ
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*
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* server -> client
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* 4 bytes - length (0 = OK, else length of error)
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* (error)
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*
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* if(mutual) {
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* server -> client
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* 4 bytes - length
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* AP-REP
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* }
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*/
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_sendauth(krb5_context context,
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krb5_auth_context *auth_context,
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krb5_pointer p_fd,
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const char *appl_version,
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krb5_principal client,
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krb5_principal server,
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krb5_flags ap_req_options,
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krb5_data *in_data,
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krb5_creds *in_creds,
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krb5_ccache ccache,
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krb5_error **ret_error,
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krb5_ap_rep_enc_part **rep_result,
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krb5_creds **out_creds)
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{
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krb5_error_code ret;
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uint32_t len, net_len;
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const char *version = KRB5_SENDAUTH_VERSION;
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u_char repl;
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krb5_data ap_req, error_data;
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krb5_creds this_cred;
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krb5_principal this_client = NULL;
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krb5_creds *creds;
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ssize_t sret;
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krb5_boolean my_ccache = FALSE;
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len = strlen(version) + 1;
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net_len = htonl(len);
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if (krb5_net_write (context, p_fd, &net_len, 4) != 4
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|| krb5_net_write (context, p_fd, version, len) != len) {
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ret = errno;
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krb5_set_error_message (context, ret, "write: %s", strerror(ret));
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return ret;
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}
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len = strlen(appl_version) + 1;
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net_len = htonl(len);
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if (krb5_net_write (context, p_fd, &net_len, 4) != 4
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|| krb5_net_write (context, p_fd, appl_version, len) != len) {
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ret = errno;
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krb5_set_error_message (context, ret, "write: %s", strerror(ret));
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return ret;
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}
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sret = krb5_net_read (context, p_fd, &repl, sizeof(repl));
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if (sret < 0) {
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ret = errno;
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krb5_set_error_message (context, ret, "read: %s", strerror(ret));
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return ret;
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} else if (sret != sizeof(repl)) {
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krb5_clear_error_message (context);
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return KRB5_SENDAUTH_BADRESPONSE;
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}
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if (repl != 0) {
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krb5_clear_error_message (context);
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return KRB5_SENDAUTH_REJECTED;
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}
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if (in_creds == NULL) {
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if (ccache == NULL) {
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ret = krb5_cc_default (context, &ccache);
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if (ret)
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return ret;
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my_ccache = TRUE;
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}
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if (client == NULL) {
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ret = krb5_cc_get_principal (context, ccache, &this_client);
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if (ret) {
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if(my_ccache)
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krb5_cc_close(context, ccache);
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return ret;
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}
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client = this_client;
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}
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memset(&this_cred, 0, sizeof(this_cred));
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this_cred.client = client;
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this_cred.server = server;
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this_cred.times.endtime = 0;
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this_cred.ticket.length = 0;
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in_creds = &this_cred;
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}
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if (in_creds->ticket.length == 0) {
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ret = krb5_get_credentials (context, 0, ccache, in_creds, &creds);
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if (ret) {
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if(my_ccache)
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krb5_cc_close(context, ccache);
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return ret;
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}
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} else {
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creds = in_creds;
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}
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if(my_ccache)
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krb5_cc_close(context, ccache);
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ret = krb5_mk_req_extended (context,
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auth_context,
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ap_req_options,
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in_data,
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creds,
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&ap_req);
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if (out_creds)
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*out_creds = creds;
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else
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krb5_free_creds(context, creds);
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if(this_client)
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krb5_free_principal(context, this_client);
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if (ret)
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return ret;
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ret = krb5_write_message (context,
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p_fd,
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&ap_req);
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if (ret)
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return ret;
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krb5_data_free (&ap_req);
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ret = krb5_read_message (context, p_fd, &error_data);
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if (ret)
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return ret;
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if (error_data.length != 0) {
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KRB_ERROR error;
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ret = krb5_rd_error (context, &error_data, &error);
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krb5_data_free (&error_data);
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if (ret == 0) {
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ret = krb5_error_from_rd_error(context, &error, NULL);
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if (ret_error != NULL) {
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*ret_error = malloc (sizeof(krb5_error));
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if (*ret_error == NULL) {
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krb5_free_error_contents (context, &error);
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} else {
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**ret_error = error;
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}
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} else {
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krb5_free_error_contents (context, &error);
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}
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return ret;
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} else {
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krb5_clear_error_message(context);
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return ret;
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}
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} else
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krb5_data_free (&error_data);
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if (ap_req_options & AP_OPTS_MUTUAL_REQUIRED) {
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krb5_data ap_rep;
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krb5_ap_rep_enc_part *ignore = NULL;
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krb5_data_zero (&ap_rep);
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ret = krb5_read_message (context,
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p_fd,
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&ap_rep);
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if (ret)
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return ret;
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ret = krb5_rd_rep (context, *auth_context, &ap_rep,
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rep_result ? rep_result : &ignore);
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krb5_data_free (&ap_rep);
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if (ret)
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return ret;
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if (rep_result == NULL)
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krb5_free_ap_rep_enc_part (context, ignore);
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}
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return 0;
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}
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