155682Smarkm/* 2233294Sstas * Copyright (c) 1997 - 2006 Kungliga Tekniska H��gskolan 3233294Sstas * (Royal Institute of Technology, Stockholm, Sweden). 4233294Sstas * All rights reserved. 555682Smarkm * 6233294Sstas * Redistribution and use in source and binary forms, with or without 7233294Sstas * modification, are permitted provided that the following conditions 8233294Sstas * are met: 955682Smarkm * 10233294Sstas * 1. Redistributions of source code must retain the above copyright 11233294Sstas * notice, this list of conditions and the following disclaimer. 1255682Smarkm * 13233294Sstas * 2. Redistributions in binary form must reproduce the above copyright 14233294Sstas * notice, this list of conditions and the following disclaimer in the 15233294Sstas * documentation and/or other materials provided with the distribution. 1655682Smarkm * 17233294Sstas * 3. Neither the name of the Institute nor the names of its contributors 18233294Sstas * may be used to endorse or promote products derived from this software 19233294Sstas * without specific prior written permission. 2055682Smarkm * 21233294Sstas * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22233294Sstas * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23233294Sstas * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24233294Sstas * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25233294Sstas * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26233294Sstas * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27233294Sstas * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28233294Sstas * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29233294Sstas * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30233294Sstas * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31233294Sstas * SUCH DAMAGE. 3255682Smarkm */ 3355682Smarkm 3455682Smarkm#include "krb5_locl.h" 3555682Smarkm 3655682Smarkm/* 3755682Smarkm * The format seems to be: 3855682Smarkm * client -> server 3955682Smarkm * 4055682Smarkm * 4 bytes - length 4155682Smarkm * KRB5_SENDAUTH_V1.0 (including zero) 4255682Smarkm * 4 bytes - length 4355682Smarkm * protocol string (with terminating zero) 4455682Smarkm * 4555682Smarkm * server -> client 4655682Smarkm * 1 byte - (0 = OK, else some kind of error) 4755682Smarkm * 4855682Smarkm * client -> server 4955682Smarkm * 4 bytes - length 5055682Smarkm * AP-REQ 5155682Smarkm * 5255682Smarkm * server -> client 5355682Smarkm * 4 bytes - length (0 = OK, else length of error) 5455682Smarkm * (error) 5555682Smarkm * 5655682Smarkm * if(mutual) { 5755682Smarkm * server -> client 5855682Smarkm * 4 bytes - length 5955682Smarkm * AP-REP 6055682Smarkm * } 6155682Smarkm */ 6255682Smarkm 63233294SstasKRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 6455682Smarkmkrb5_sendauth(krb5_context context, 6555682Smarkm krb5_auth_context *auth_context, 6655682Smarkm krb5_pointer p_fd, 6755682Smarkm const char *appl_version, 6855682Smarkm krb5_principal client, 6955682Smarkm krb5_principal server, 7055682Smarkm krb5_flags ap_req_options, 7155682Smarkm krb5_data *in_data, 7255682Smarkm krb5_creds *in_creds, 7355682Smarkm krb5_ccache ccache, 7455682Smarkm krb5_error **ret_error, 7555682Smarkm krb5_ap_rep_enc_part **rep_result, 7655682Smarkm krb5_creds **out_creds) 7755682Smarkm{ 7855682Smarkm krb5_error_code ret; 79178825Sdfr uint32_t len, net_len; 8055682Smarkm const char *version = KRB5_SENDAUTH_VERSION; 8155682Smarkm u_char repl; 8255682Smarkm krb5_data ap_req, error_data; 8355682Smarkm krb5_creds this_cred; 8455682Smarkm krb5_principal this_client = NULL; 8555682Smarkm krb5_creds *creds; 8655682Smarkm ssize_t sret; 87103423Snectar krb5_boolean my_ccache = FALSE; 8855682Smarkm 8955682Smarkm len = strlen(version) + 1; 9055682Smarkm net_len = htonl(len); 9155682Smarkm if (krb5_net_write (context, p_fd, &net_len, 4) != 4 9278527Sassar || krb5_net_write (context, p_fd, version, len) != len) { 9378527Sassar ret = errno; 94233294Sstas krb5_set_error_message (context, ret, "write: %s", strerror(ret)); 9578527Sassar return ret; 9678527Sassar } 9755682Smarkm 9855682Smarkm len = strlen(appl_version) + 1; 9955682Smarkm net_len = htonl(len); 10055682Smarkm if (krb5_net_write (context, p_fd, &net_len, 4) != 4 10178527Sassar || krb5_net_write (context, p_fd, appl_version, len) != len) { 10278527Sassar ret = errno; 103233294Sstas krb5_set_error_message (context, ret, "write: %s", strerror(ret)); 10478527Sassar return ret; 10578527Sassar } 10655682Smarkm 10755682Smarkm sret = krb5_net_read (context, p_fd, &repl, sizeof(repl)); 10878527Sassar if (sret < 0) { 10978527Sassar ret = errno; 110233294Sstas krb5_set_error_message (context, ret, "read: %s", strerror(ret)); 11178527Sassar return ret; 11278527Sassar } else if (sret != sizeof(repl)) { 113233294Sstas krb5_clear_error_message (context); 11455682Smarkm return KRB5_SENDAUTH_BADRESPONSE; 11578527Sassar } 11655682Smarkm 11778527Sassar if (repl != 0) { 118233294Sstas krb5_clear_error_message (context); 11955682Smarkm return KRB5_SENDAUTH_REJECTED; 12078527Sassar } 12155682Smarkm 12255682Smarkm if (in_creds == NULL) { 12355682Smarkm if (ccache == NULL) { 12455682Smarkm ret = krb5_cc_default (context, &ccache); 12555682Smarkm if (ret) 12655682Smarkm return ret; 127103423Snectar my_ccache = TRUE; 12855682Smarkm } 12955682Smarkm 13055682Smarkm if (client == NULL) { 13155682Smarkm ret = krb5_cc_get_principal (context, ccache, &this_client); 132103423Snectar if (ret) { 133103423Snectar if(my_ccache) 134103423Snectar krb5_cc_close(context, ccache); 13555682Smarkm return ret; 136103423Snectar } 13755682Smarkm client = this_client; 13855682Smarkm } 13955682Smarkm memset(&this_cred, 0, sizeof(this_cred)); 14055682Smarkm this_cred.client = client; 14155682Smarkm this_cred.server = server; 14255682Smarkm this_cred.times.endtime = 0; 14355682Smarkm this_cred.ticket.length = 0; 14455682Smarkm in_creds = &this_cred; 14555682Smarkm } 14655682Smarkm if (in_creds->ticket.length == 0) { 14755682Smarkm ret = krb5_get_credentials (context, 0, ccache, in_creds, &creds); 148103423Snectar if (ret) { 149103423Snectar if(my_ccache) 150103423Snectar krb5_cc_close(context, ccache); 15155682Smarkm return ret; 152103423Snectar } 15355682Smarkm } else { 15455682Smarkm creds = in_creds; 15555682Smarkm } 156103423Snectar if(my_ccache) 157103423Snectar krb5_cc_close(context, ccache); 15855682Smarkm ret = krb5_mk_req_extended (context, 15955682Smarkm auth_context, 16055682Smarkm ap_req_options, 16155682Smarkm in_data, 16255682Smarkm creds, 16355682Smarkm &ap_req); 16455682Smarkm 16555682Smarkm if (out_creds) 16655682Smarkm *out_creds = creds; 16755682Smarkm else 16855682Smarkm krb5_free_creds(context, creds); 16955682Smarkm if(this_client) 17055682Smarkm krb5_free_principal(context, this_client); 17155682Smarkm 17255682Smarkm if (ret) 17355682Smarkm return ret; 17455682Smarkm 17555682Smarkm ret = krb5_write_message (context, 17655682Smarkm p_fd, 17755682Smarkm &ap_req); 17855682Smarkm if (ret) 17955682Smarkm return ret; 18055682Smarkm 18155682Smarkm krb5_data_free (&ap_req); 18255682Smarkm 18355682Smarkm ret = krb5_read_message (context, p_fd, &error_data); 18455682Smarkm if (ret) 18555682Smarkm return ret; 18655682Smarkm 18755682Smarkm if (error_data.length != 0) { 18855682Smarkm KRB_ERROR error; 18955682Smarkm 19055682Smarkm ret = krb5_rd_error (context, &error_data, &error); 19155682Smarkm krb5_data_free (&error_data); 19255682Smarkm if (ret == 0) { 19378527Sassar ret = krb5_error_from_rd_error(context, &error, NULL); 19455682Smarkm if (ret_error != NULL) { 19555682Smarkm *ret_error = malloc (sizeof(krb5_error)); 19655682Smarkm if (*ret_error == NULL) { 19778527Sassar krb5_free_error_contents (context, &error); 19855682Smarkm } else { 19955682Smarkm **ret_error = error; 20055682Smarkm } 20155682Smarkm } else { 20278527Sassar krb5_free_error_contents (context, &error); 20355682Smarkm } 20455682Smarkm return ret; 20578527Sassar } else { 206233294Sstas krb5_clear_error_message(context); 20778527Sassar return ret; 20878527Sassar } 209233294Sstas } else 210233294Sstas krb5_data_free (&error_data); 21155682Smarkm 21255682Smarkm if (ap_req_options & AP_OPTS_MUTUAL_REQUIRED) { 21355682Smarkm krb5_data ap_rep; 214233294Sstas krb5_ap_rep_enc_part *ignore = NULL; 21555682Smarkm 21655682Smarkm krb5_data_zero (&ap_rep); 21755682Smarkm ret = krb5_read_message (context, 21855682Smarkm p_fd, 21955682Smarkm &ap_rep); 22055682Smarkm if (ret) 22155682Smarkm return ret; 22255682Smarkm 22355682Smarkm ret = krb5_rd_rep (context, *auth_context, &ap_rep, 22455682Smarkm rep_result ? rep_result : &ignore); 225178825Sdfr krb5_data_free (&ap_rep); 22655682Smarkm if (ret) 22755682Smarkm return ret; 22855682Smarkm if (rep_result == NULL) 22955682Smarkm krb5_free_ap_rep_enc_part (context, ignore); 23055682Smarkm } 23155682Smarkm return 0; 23255682Smarkm} 233