lib/kafs/afskrb.c

   1 /*
   2  * Copyright (c) 1995 - 2001, 2003 Kungliga Tekniska Högskolan
   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 "kafs_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 #ifdef KRB4
  39
  40 struct krb_kafs_data {
  41     const char *realm;
  42 };
  43
  44 static int
  45 get_cred(struct kafs_data *data, const char *name, const char *inst,
  46          const char *realm, uid_t uid, struct kafs_token *kt)
  47 {
  48     CREDENTIALS c;
  49     KTEXT_ST tkt;
  50     int ret = krb_get_cred((char*)name, (char*)inst, (char*)realm, &c);
  51
  52     if (ret) {
  53         ret = krb_mk_req(&tkt, (char*)name, (char*)inst, (char*)realm, 0);
  54         if (ret == KSUCCESS)
  55             ret = krb_get_cred((char*)name, (char*)inst, (char*)realm, &c);
  56     }
  57     if (ret == 0)
  58         ret = _kafs_v4_to_kt(&c, uid, kt);
  59     return ret;
  60 }
  61
  62 static int
  63 afslog_uid_int(struct kafs_data *data,
  64                const char *cell,
  65                const char *realm_hint,
  66                uid_t uid,
  67                const char *homedir)
  68 {
  69     int ret;
  70     struct kafs_token kt;
  71     char name[ANAME_SZ];
  72     char inst[INST_SZ];
  73     char realm[REALM_SZ];
  74
  75     kt.ticket = NULL;
  76
  77     if (cell == 0 || cell[0] == 0)
  78         return _kafs_afslog_all_local_cells (data, uid, homedir);
  79
  80     /* Extract realm from ticket file. */
  81     ret = krb_get_tf_fullname(tkt_string(), name, inst, realm);
  82     if (ret != KSUCCESS)
  83         return ret;
  84
  85     kt.ticket = NULL;
  86     ret = _kafs_get_cred(data, cell, realm_hint, realm, uid, &kt);
  87
  88     if (ret == 0) {
  89         ret = kafs_settoken_rxkad(cell, &kt.ct, kt.ticket, kt.ticket_len);
  90         free(kt.ticket);
  91     }
  92     return ret;
  93 }
  94
  95 static char *
  96 get_realm(struct kafs_data *data, const char *host)
  97 {
  98     char *r = krb_realmofhost(host);
  99     if(r != NULL)
 100         return strdup(r);
 101     else
 102         return NULL;
 103 }
 104
 105 int
 106 krb_afslog_uid_home(const char *cell, const char *realm_hint, uid_t uid,
 107                     const char *homedir)
 108 {
 109     struct kafs_data kd;
 110
 111     kd.name = "krb4";
 112     kd.afslog_uid = afslog_uid_int;
 113     kd.get_cred = get_cred;
 114     kd.get_realm = get_realm;
 115     kd.data = 0;
 116     return afslog_uid_int(&kd, cell, realm_hint, uid, homedir);
 117 }
 118
 119 int
 120 krb_afslog_uid(const char *cell, const char *realm_hint, uid_t uid)
 121 {
 122     return krb_afslog_uid_home(cell, realm_hint, uid, NULL);
 123 }
 124
 125 int
 126 krb_afslog(const char *cell, const char *realm_hint)
 127 {
 128     return krb_afslog_uid(cell, realm_hint, getuid());
 129 }
 130
 131 int
 132 krb_afslog_home(const char *cell, const char *realm_hint, const char *homedir)
 133 {
 134     return krb_afslog_uid_home(cell, realm_hint, getuid(), homedir);
 135 }
 136
 137 /*
 138  *
 139  */
 140
 141 int
 142 krb_realm_of_cell(const char *cell, char **realm)
 143 {
 144     struct kafs_data kd;
 145
 146     kd.name = "krb4";
 147     kd.get_realm = get_realm;
 148     return _kafs_realm_of_cell(&kd, cell, realm);
 149 }
 150
 151 int
 152 kafs_settoken(const char *cell, uid_t uid, CREDENTIALS *c)
 153 {
 154     struct kafs_token kt;
 155     int ret;
 156
 157     kt.ticket = NULL;
 158
 159     ret = _kafs_v4_to_kt(c, uid, &kt);
 160     if (ret)
 161         return ret;
 162
 163     if (kt.ct.EndTimestamp < time(NULL)) {
 164         free(kt.ticket);
 165         return 0;
 166     }
 167
 168     ret = kafs_settoken_rxkad(cell, &kt.ct, kt.ticket, kt.ticket_len);
 169     free(kt.ticket);
 170     return ret;
 171 }
 172
 173 #else /* KRB4 */
 174
 175 #define KAFS_KRBET_KDC_SERVICE_EXP 39525378
 176
 177 int
 178 krb_afslog_uid_home(const char *cell, const char *realm_hint, uid_t uid,
 179                     const char *homedir)
 180 {
 181     return KAFS_KRBET_KDC_SERVICE_EXP;
 182 }
 183
 184 int
 185 krb_afslog_uid(const char *cell, const char *realm_hint, uid_t uid)
 186 {
 187     return KAFS_KRBET_KDC_SERVICE_EXP;
 188 }
 189
 190 int
 191 krb_afslog_home(const char *cell, const char *realm_hint, const char *homedir)
 192 {
 193     return KAFS_KRBET_KDC_SERVICE_EXP;
 194 }
 195
 196 int
 197 krb_afslog(const char *cell, const char *realm_hint)
 198 {
 199     return KAFS_KRBET_KDC_SERVICE_EXP;
 200 }
 201
 202 int
 203 krb_realm_of_cell(const char *cell, char **realm)
 204 {
 205     *realm = NULL;
 206     return KAFS_KRBET_KDC_SERVICE_EXP;
 207 }
 208
 209 int kafs_settoken (const char*, uid_t, struct credentials *);
 210
 211 int
 212 kafs_settoken(const char *cell, uid_t uid, struct credentials *c)
 213 {
 214     return KAFS_KRBET_KDC_SERVICE_EXP;
 215 }
 216
 217 #endif /* KRB4 */