1 /* 2 * Copyright (c) 1997, 1998, 1999 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 #include <krb5_locl.h> 35 36 RCSID("$Id: mk_req_ext.c,v 1.21 1999/12/02 17:05:11 joda Exp $"); 37 38 krb5_error_code 39 krb5_mk_req_internal(krb5_context context, 40 krb5_auth_context *auth_context, 41 const krb5_flags ap_req_options, 42 krb5_data *in_data, 43 krb5_creds *in_creds, 44 krb5_data *outbuf, 45 krb5_key_usage usage) 46 { 47 krb5_error_code ret; 48 krb5_data authenticator; 49 Checksum c; 50 Checksum *c_opt; 51 krb5_auth_context ac; 52 53 if(auth_context) { 54 if(*auth_context == NULL) 55 ret = krb5_auth_con_init(context, auth_context); 56 else 57 ret = 0; 58 ac = *auth_context; 59 } else 60 ret = krb5_auth_con_init(context, &ac); 61 if(ret) 62 return ret; 63 64 #if 0 65 { 66 /* This is somewhat bogus since we're possibly overwriting a 67 value specified by the user, but it's the easiest way to make 68 the code use a compatible enctype */ 69 Ticket ticket; 70 krb5_keytype ticket_keytype; 71 72 ret = decode_Ticket(in_creds->ticket.data, 73 in_creds->ticket.length, 74 &ticket, 75 NULL); 76 krb5_enctype_to_keytype (context, 77 ticket.enc_part.etype, 78 &ticket_keytype); 79 80 if (ticket_keytype == in_creds->session.keytype) 81 krb5_auth_setenctype(context, 82 ac, 83 ticket.enc_part.etype); 84 free_Ticket(&ticket); 85 } 86 #endif 87 88 krb5_free_keyblock(context, ac->keyblock); 89 krb5_copy_keyblock(context, &in_creds->session, &ac->keyblock); 90 91 if (in_data) { 92 if(ac->keyblock->keytype == ETYPE_DES_CBC_CRC) { 93 /* this is to make DCE secd (and older MIT kdcs?) happy */ 94 ret = krb5_create_checksum(context, 95 NULL, 96 CKSUMTYPE_RSA_MD4, 97 in_data->data, 98 in_data->length, 99 &c); 100 } else { 101 krb5_crypto crypto; 102 krb5_crypto_init(context, ac->keyblock, 0, &crypto); 103 ret = krb5_create_checksum(context, 104 crypto, 105 usage, 106 in_data->data, 107 in_data->length, 108 &c); 109 110 krb5_crypto_destroy(context, crypto); 111 } 112 c_opt = &c; 113 } else { 114 c_opt = NULL; 115 } 116 117 ret = krb5_build_authenticator (context, 118 ac, 119 ac->keyblock->keytype, 120 in_creds, 121 c_opt, 122 NULL, 123 &authenticator); 124 if (c_opt) 125 free_Checksum (c_opt); 126 if (ret) 127 return ret; 128 129 ret = krb5_build_ap_req (context, ac->keyblock->keytype, 130 in_creds, ap_req_options, authenticator, outbuf); 131 if(auth_context == NULL) 132 krb5_auth_con_free(context, ac); 133 return ret; 134 } 135 136 krb5_error_code 137 krb5_mk_req_extended(krb5_context context, 138 krb5_auth_context *auth_context, 139 const krb5_flags ap_req_options, 140 krb5_data *in_data, 141 krb5_creds *in_creds, 142 krb5_data *outbuf) 143 { 144 return krb5_mk_req_internal (context, 145 auth_context, 146 ap_req_options, 147 in_data, 148 in_creds, 149 outbuf, 150 KRB5_KU_AP_REQ_AUTH_CKSUM); 151 } 152