mk_req.c revision 178825
1/* 2 * Copyright (c) 1997 - 2000, 2002 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34/* implementation of krb_mk_req that uses 524 protocol */ 35 36#include "45_locl.h" 37 38RCSID("$Id: mk_req.c 17445 2006-05-05 10:37:46Z lha $"); 39 40static int lifetime = 255; 41 42static void 43build_request(KTEXT req, 44 const char *name, const char *inst, const char *realm, 45 uint32_t checksum) 46{ 47 struct timeval tv; 48 krb5_storage *sp; 49 krb5_data data; 50 sp = krb5_storage_emem(); 51 krb5_store_stringz(sp, name); 52 krb5_store_stringz(sp, inst); 53 krb5_store_stringz(sp, realm); 54 krb5_store_int32(sp, checksum); 55 gettimeofday(&tv, NULL); 56 krb5_store_int8(sp, tv.tv_usec / 5000); 57 krb5_store_int32(sp, tv.tv_sec); 58 krb5_storage_to_data(sp, &data); 59 krb5_storage_free(sp); 60 memcpy(req->dat, data.data, data.length); 61 req->length = (data.length + 7) & ~7; 62 krb5_data_free(&data); 63} 64 65#ifdef KRB_MK_REQ_CONST 66int 67krb_mk_req(KTEXT authent, 68 const char *service, const char *instance, const char *realm, 69 int32_t checksum) 70#else 71int 72krb_mk_req(KTEXT authent, 73 char *service, char *instance, char *realm, 74 int32_t checksum) 75 76#endif 77{ 78 CREDENTIALS cr; 79 KTEXT_ST req; 80 krb5_storage *sp; 81 int code; 82 /* XXX get user realm */ 83 const char *myrealm = realm; 84 krb5_data a; 85 86 code = krb_get_cred(service, instance, realm, &cr); 87 if(code || time(NULL) > krb_life_to_time(cr.issue_date, cr.lifetime)){ 88 code = get_ad_tkt((char *)service, 89 (char *)instance, (char *)realm, lifetime); 90 if(code == KSUCCESS) 91 code = krb_get_cred(service, instance, realm, &cr); 92 } 93 94 if(code) 95 return code; 96 97 sp = krb5_storage_emem(); 98 99 krb5_store_int8(sp, KRB_PROT_VERSION); 100 krb5_store_int8(sp, AUTH_MSG_APPL_REQUEST); 101 102 krb5_store_int8(sp, cr.kvno); 103 krb5_store_stringz(sp, realm); 104 krb5_store_int8(sp, cr.ticket_st.length); 105 106 build_request(&req, cr.pname, cr.pinst, myrealm, checksum); 107 encrypt_ktext(&req, &cr.session, DES_ENCRYPT); 108 109 krb5_store_int8(sp, req.length); 110 111 krb5_storage_write(sp, cr.ticket_st.dat, cr.ticket_st.length); 112 krb5_storage_write(sp, req.dat, req.length); 113 krb5_storage_to_data(sp, &a); 114 krb5_storage_free(sp); 115 memcpy(authent->dat, a.data, a.length); 116 authent->length = a.length; 117 krb5_data_free(&a); 118 119 memset(&cr, 0, sizeof(cr)); 120 memset(&req, 0, sizeof(req)); 121 122 return KSUCCESS; 123} 124 125/* 126 * krb_set_lifetime sets the default lifetime for additional tickets 127 * obtained via krb_mk_req(). 128 * 129 * It returns the previous value of the default lifetime. 130 */ 131 132int 133krb_set_lifetime(int newval) 134{ 135 int olife = lifetime; 136 137 lifetime = newval; 138 return(olife); 139} 140