155682Smarkm/* 2233294Sstas * Copyright (c) 1995-2003 Kungliga Tekniska H��gskolan 355682Smarkm * (Royal Institute of Technology, Stockholm, Sweden). 455682Smarkm * All rights reserved. 5233294Sstas * 655682Smarkm * Redistribution and use in source and binary forms, with or without 755682Smarkm * modification, are permitted provided that the following conditions 855682Smarkm * are met: 9233294Sstas * 1055682Smarkm * 1. Redistributions of source code must retain the above copyright 1155682Smarkm * notice, this list of conditions and the following disclaimer. 12233294Sstas * 1355682Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1455682Smarkm * notice, this list of conditions and the following disclaimer in the 1555682Smarkm * documentation and/or other materials provided with the distribution. 16233294Sstas * 1755682Smarkm * 3. Neither the name of the Institute nor the names of its contributors 1855682Smarkm * may be used to endorse or promote products derived from this software 1955682Smarkm * without specific prior written permission. 20233294Sstas * 2155682Smarkm * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 2255682Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2355682Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2455682Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 2555682Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2655682Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2755682Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2855682Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2955682Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3055682Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3155682Smarkm * SUCH DAMAGE. 3255682Smarkm */ 3355682Smarkm 3455682Smarkm#include "kafs_locl.h" 3555682Smarkm 3655682Smarkmstruct krb5_kafs_data { 3755682Smarkm krb5_context context; 3855682Smarkm krb5_ccache id; 3955682Smarkm krb5_const_realm realm; 4055682Smarkm}; 4155682Smarkm 42233294Sstasenum { 43120945Snectar KAFS_RXKAD_2B_KVNO = 213, 44120945Snectar KAFS_RXKAD_K5_KVNO = 256 45120945Snectar}; 46120945Snectar 4755682Smarkmstatic int 48120945Snectarv5_to_kt(krb5_creds *cred, uid_t uid, struct kafs_token *kt, int local524) 49120945Snectar{ 50120945Snectar int kvno, ret; 51120945Snectar 52120945Snectar kt->ticket = NULL; 53120945Snectar 54120945Snectar /* check if des key */ 55120945Snectar if (cred->session.keyvalue.length != 8) 56120945Snectar return EINVAL; 57120945Snectar 58120945Snectar if (local524) { 59120945Snectar Ticket t; 60120945Snectar unsigned char *buf; 61120945Snectar size_t buf_len; 62120945Snectar size_t len; 63120945Snectar 64120945Snectar kvno = KAFS_RXKAD_2B_KVNO; 65120945Snectar 66120945Snectar ret = decode_Ticket(cred->ticket.data, cred->ticket.length, &t, &len); 67120945Snectar if (ret) 68120945Snectar return ret; 69120945Snectar if (t.tkt_vno != 5) 70120945Snectar return -1; 71120945Snectar 72120945Snectar ASN1_MALLOC_ENCODE(EncryptedData, buf, buf_len, &t.enc_part, 73120945Snectar &len, ret); 74120945Snectar free_Ticket(&t); 75120945Snectar if (ret) 76120945Snectar return ret; 77120945Snectar if(buf_len != len) { 78120945Snectar free(buf); 79120945Snectar return KRB5KRB_ERR_GENERIC; 80120945Snectar } 81120945Snectar 82120945Snectar kt->ticket = buf; 83120945Snectar kt->ticket_len = buf_len; 84120945Snectar 85120945Snectar } else { 86120945Snectar kvno = KAFS_RXKAD_K5_KVNO; 87120945Snectar kt->ticket = malloc(cred->ticket.length); 88120945Snectar if (kt->ticket == NULL) 89120945Snectar return ENOMEM; 90120945Snectar kt->ticket_len = cred->ticket.length; 91120945Snectar memcpy(kt->ticket, cred->ticket.data, kt->ticket_len); 92120945Snectar 93120945Snectar ret = 0; 94120945Snectar } 95120945Snectar 96120945Snectar 97120945Snectar /* 98120945Snectar * Build a struct ClearToken 99120945Snectar */ 100120945Snectar 101120945Snectar kt->ct.AuthHandle = kvno; 102120945Snectar memcpy(kt->ct.HandShakeKey, cred->session.keyvalue.data, 8); 103120945Snectar kt->ct.ViceId = uid; 104120945Snectar kt->ct.BeginTimestamp = cred->times.starttime; 105120945Snectar kt->ct.EndTimestamp = cred->times.endtime; 106120945Snectar 107120945Snectar _kafs_fixup_viceid(&kt->ct, uid); 108120945Snectar 109120945Snectar return 0; 110120945Snectar} 111120945Snectar 112120945Snectarstatic krb5_error_code 113120945Snectarv5_convert(krb5_context context, krb5_ccache id, 114233294Sstas krb5_creds *cred, uid_t uid, 115120945Snectar const char *cell, 116120945Snectar struct kafs_token *kt) 117120945Snectar{ 118120945Snectar krb5_error_code ret; 119120945Snectar char *c, *val; 120120945Snectar 121120945Snectar c = strdup(cell); 122120945Snectar if (c == NULL) 123120945Snectar return ENOMEM; 124120945Snectar _kafs_foldup(c, c); 125120945Snectar krb5_appdefault_string (context, "libkafs", 126120945Snectar c, 127178825Sdfr "afs-use-524", "2b", &val); 128120945Snectar free(c); 129120945Snectar 130233294Sstas if (strcasecmp(val, "local") == 0 || 131120945Snectar strcasecmp(val, "2b") == 0) 132120945Snectar ret = v5_to_kt(cred, uid, kt, 1); 133233294Sstas else 134120945Snectar ret = v5_to_kt(cred, uid, kt, 0); 135120945Snectar 136120945Snectar free(val); 137120945Snectar return ret; 138120945Snectar} 139120945Snectar 140120945Snectar 141120945Snectar/* 142120945Snectar * 143120945Snectar */ 144120945Snectar 145120945Snectarstatic int 146233294Sstasget_cred(struct kafs_data *data, const char *name, const char *inst, 147120945Snectar const char *realm, uid_t uid, struct kafs_token *kt) 14855682Smarkm{ 14955682Smarkm krb5_error_code ret; 15055682Smarkm krb5_creds in_creds, *out_creds; 15155682Smarkm struct krb5_kafs_data *d = data->data; 152233294Sstas int invalid; 15355682Smarkm 15455682Smarkm memset(&in_creds, 0, sizeof(in_creds)); 155233294Sstas 156233294Sstas ret = krb5_make_principal(d->context, &in_creds.server, 157233294Sstas realm, name, inst, NULL); 15855682Smarkm if(ret) 15955682Smarkm return ret; 16055682Smarkm ret = krb5_cc_get_principal(d->context, d->id, &in_creds.client); 16155682Smarkm if(ret){ 16255682Smarkm krb5_free_principal(d->context, in_creds.server); 16355682Smarkm return ret; 16455682Smarkm } 165233294Sstas 166178825Sdfr in_creds.session.keytype = ETYPE_DES_CBC_CRC; 167233294Sstas 168233294Sstas /* check if des is disable, and in that case enable it for afs */ 169233294Sstas invalid = krb5_enctype_valid(d->context, in_creds.session.keytype); 170233294Sstas if (invalid) 171233294Sstas krb5_enctype_enable(d->context, in_creds.session.keytype); 172233294Sstas 17355682Smarkm ret = krb5_get_credentials(d->context, 0, d->id, &in_creds, &out_creds); 174233294Sstas if (ret) { 175233294Sstas in_creds.session.keytype = ETYPE_DES_CBC_MD5; 176233294Sstas ret = krb5_get_credentials(d->context, 0, d->id, &in_creds, &out_creds); 177233294Sstas } 178233294Sstas 179233294Sstas if (invalid) 180233294Sstas krb5_enctype_disable(d->context, in_creds.session.keytype); 181233294Sstas 18255682Smarkm krb5_free_principal(d->context, in_creds.server); 18355682Smarkm krb5_free_principal(d->context, in_creds.client); 18455682Smarkm if(ret) 18555682Smarkm return ret; 186120945Snectar 187233294Sstas ret = v5_convert(d->context, d->id, out_creds, uid, 188120945Snectar (inst != NULL && inst[0] != '\0') ? inst : realm, kt); 18955682Smarkm krb5_free_creds(d->context, out_creds); 190120945Snectar 19155682Smarkm return ret; 19255682Smarkm} 19355682Smarkm 194233294Sstasstatic const char * 195233294Sstasget_error(struct kafs_data *data, int error) 196233294Sstas{ 197233294Sstas struct krb5_kafs_data *d = data->data; 198233294Sstas return krb5_get_error_message(d->context, error); 199233294Sstas} 200233294Sstas 201233294Sstasstatic void 202233294Sstasfree_error(struct kafs_data *data, const char *str) 203233294Sstas{ 204233294Sstas struct krb5_kafs_data *d = data->data; 205233294Sstas krb5_free_error_message(d->context, str); 206233294Sstas} 207233294Sstas 20855682Smarkmstatic krb5_error_code 209178825Sdfrafslog_uid_int(struct kafs_data *data, const char *cell, const char *rh, 210178825Sdfr uid_t uid, const char *homedir) 21155682Smarkm{ 21255682Smarkm krb5_error_code ret; 213120945Snectar struct kafs_token kt; 21455682Smarkm krb5_principal princ; 215178825Sdfr const char *trealm; /* ticket realm */ 21655682Smarkm struct krb5_kafs_data *d = data->data; 217233294Sstas 21855682Smarkm if (cell == 0 || cell[0] == 0) 21955682Smarkm return _kafs_afslog_all_local_cells (data, uid, homedir); 22055682Smarkm 22155682Smarkm ret = krb5_cc_get_principal (d->context, d->id, &princ); 22255682Smarkm if (ret) 22355682Smarkm return ret; 22455682Smarkm 225178825Sdfr trealm = krb5_principal_get_realm (d->context, princ); 22655682Smarkm 227120945Snectar kt.ticket = NULL; 228178825Sdfr ret = _kafs_get_cred(data, cell, d->realm, trealm, uid, &kt); 229178825Sdfr krb5_free_principal (d->context, princ); 230233294Sstas 231120945Snectar if(ret == 0) { 232120945Snectar ret = kafs_settoken_rxkad(cell, &kt.ct, kt.ticket, kt.ticket_len); 233120945Snectar free(kt.ticket); 234120945Snectar } 23555682Smarkm return ret; 23655682Smarkm} 23755682Smarkm 23855682Smarkmstatic char * 239178825Sdfrget_realm(struct kafs_data *data, const char *host) 24055682Smarkm{ 24155682Smarkm struct krb5_kafs_data *d = data->data; 24255682Smarkm krb5_realm *realms; 24355682Smarkm char *r; 24455682Smarkm if(krb5_get_host_realm(d->context, host, &realms)) 24555682Smarkm return NULL; 24655682Smarkm r = strdup(realms[0]); 24755682Smarkm krb5_free_host_realm(d->context, realms); 24855682Smarkm return r; 24955682Smarkm} 25055682Smarkm 25155682Smarkmkrb5_error_code 25255682Smarkmkrb5_afslog_uid_home(krb5_context context, 25355682Smarkm krb5_ccache id, 25455682Smarkm const char *cell, 25555682Smarkm krb5_const_realm realm, 25655682Smarkm uid_t uid, 25755682Smarkm const char *homedir) 25855682Smarkm{ 259178825Sdfr struct kafs_data kd; 26055682Smarkm struct krb5_kafs_data d; 261178825Sdfr krb5_error_code ret; 262178825Sdfr 263120945Snectar kd.name = "krb5"; 26455682Smarkm kd.afslog_uid = afslog_uid_int; 26555682Smarkm kd.get_cred = get_cred; 26655682Smarkm kd.get_realm = get_realm; 267233294Sstas kd.get_error = get_error; 268233294Sstas kd.free_error = free_error; 26955682Smarkm kd.data = &d; 270178825Sdfr if (context == NULL) { 271178825Sdfr ret = krb5_init_context(&d.context); 272178825Sdfr if (ret) 273178825Sdfr return ret; 274178825Sdfr } else 275178825Sdfr d.context = context; 276178825Sdfr if (id == NULL) { 277178825Sdfr ret = krb5_cc_default(d.context, &d.id); 278178825Sdfr if (ret) 279178825Sdfr goto out; 280178825Sdfr } else 281178825Sdfr d.id = id; 28255682Smarkm d.realm = realm; 283178825Sdfr ret = afslog_uid_int(&kd, cell, 0, uid, homedir); 284178825Sdfr if (id == NULL) 285178825Sdfr krb5_cc_close(context, d.id); 286178825Sdfr out: 287178825Sdfr if (context == NULL) 288178825Sdfr krb5_free_context(d.context); 289178825Sdfr return ret; 29055682Smarkm} 29155682Smarkm 29255682Smarkmkrb5_error_code 29355682Smarkmkrb5_afslog_uid(krb5_context context, 29455682Smarkm krb5_ccache id, 29555682Smarkm const char *cell, 29655682Smarkm krb5_const_realm realm, 29755682Smarkm uid_t uid) 29855682Smarkm{ 29955682Smarkm return krb5_afslog_uid_home (context, id, cell, realm, uid, NULL); 30055682Smarkm} 30155682Smarkm 30255682Smarkmkrb5_error_code 30355682Smarkmkrb5_afslog(krb5_context context, 304233294Sstas krb5_ccache id, 30555682Smarkm const char *cell, 30655682Smarkm krb5_const_realm realm) 30755682Smarkm{ 30855682Smarkm return krb5_afslog_uid (context, id, cell, realm, getuid()); 30955682Smarkm} 31055682Smarkm 31155682Smarkmkrb5_error_code 31255682Smarkmkrb5_afslog_home(krb5_context context, 313233294Sstas krb5_ccache id, 31455682Smarkm const char *cell, 31555682Smarkm krb5_const_realm realm, 31655682Smarkm const char *homedir) 31755682Smarkm{ 31855682Smarkm return krb5_afslog_uid_home (context, id, cell, realm, getuid(), homedir); 31955682Smarkm} 32055682Smarkm 32155682Smarkm/* 32255682Smarkm * 32355682Smarkm */ 32455682Smarkm 32555682Smarkmkrb5_error_code 32655682Smarkmkrb5_realm_of_cell(const char *cell, char **realm) 32755682Smarkm{ 328178825Sdfr struct kafs_data kd; 32955682Smarkm 330120945Snectar kd.name = "krb5"; 33155682Smarkm kd.get_realm = get_realm; 332233294Sstas kd.get_error = get_error; 333233294Sstas kd.free_error = free_error; 33455682Smarkm return _kafs_realm_of_cell(&kd, cell, realm); 33555682Smarkm} 336120945Snectar 337120945Snectar/* 338120945Snectar * 339120945Snectar */ 340120945Snectar 341120945Snectarint 342120945Snectarkafs_settoken5(krb5_context context, const char *cell, uid_t uid, 343120945Snectar krb5_creds *cred) 344120945Snectar{ 345120945Snectar struct kafs_token kt; 346120945Snectar int ret; 347120945Snectar 348120945Snectar ret = v5_convert(context, NULL, cred, uid, cell, &kt); 349120945Snectar if (ret) 350120945Snectar return ret; 351120945Snectar 352120945Snectar ret = kafs_settoken_rxkad(cell, &kt.ct, kt.ticket, kt.ticket_len); 353120945Snectar 354120945Snectar free(kt.ticket); 355120945Snectar 356120945Snectar return ret; 357120945Snectar} 358