crypto/dist/heimdal/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("$Heimdal: afskrb.c 15342 2005-06-02 07:38:22Z lha $"
  37         "$NetBSD$");
  38
  39 #ifdef KRB4
  40
  41 struct krb_kafs_data {
  42     const char *realm;
  43 };
  44
  45 static int
  46 get_cred(struct kafs_data *data, const char *name, const char *inst,
  47          const char *realm, uid_t uid, struct kafs_token *kt)
  48 {
  49     CREDENTIALS c;
  50     KTEXT_ST tkt;
  51     int ret = krb_get_cred((char*)name, (char*)inst, (char*)realm, &c);
  52
  53     if (ret) {
  54         ret = krb_mk_req(&tkt, (char*)name, (char*)inst, (char*)realm, 0);
  55         if (ret == KSUCCESS)
  56             ret = krb_get_cred((char*)name, (char*)inst, (char*)realm, &c);
  57     }
  58     if (ret == 0)
  59         ret = _kafs_v4_to_kt(&c, uid, kt);
  60     return ret;
  61 }
  62
  63 static int
  64 afslog_uid_int(struct kafs_data *data,
  65                const char *cell,
  66                const char *realm_hint,
  67                uid_t uid,
  68                const char *homedir)
  69 {
  70     int ret;
  71     struct kafs_token kt;
  72     char name[ANAME_SZ];
  73     char inst[INST_SZ];
  74     char realm[REALM_SZ];
  75
  76     kt.ticket = NULL;
  77
  78     if (cell == 0 || cell[0] == 0)
  79         return _kafs_afslog_all_local_cells (data, uid, homedir);
  80
  81     /* Extract realm from ticket file. */
  82     ret = krb_get_tf_fullname(tkt_string(), name, inst, realm);
  83     if (ret != KSUCCESS)
  84         return ret;
  85
  86     kt.ticket = NULL;
  87     ret = _kafs_get_cred(data, cell, realm_hint, realm, uid, &kt);
  88
  89     if (ret == 0) {
  90         ret = kafs_settoken_rxkad(cell, &kt.ct, kt.ticket, kt.ticket_len);
  91         free(kt.ticket);
  92     }
  93     return ret;
  94 }
  95
  96 static char *
  97 get_realm(struct kafs_data *data, const char *host)
  98 {
  99     char *r = krb_realmofhost(host);
 100     if(r != NULL)
 101         return strdup(r);
 102     else
 103         return NULL;
 104 }
 105
 106 int
 107 krb_afslog_uid_home(const char *cell, const char *realm_hint, uid_t uid,
 108                     const char *homedir)
 109 {
 110     struct kafs_data kd;
 111
 112     kd.name = "krb4";
 113     kd.afslog_uid = afslog_uid_int;
 114     kd.get_cred = get_cred;
 115     kd.get_realm = get_realm;
 116     kd.data = 0;
 117     return afslog_uid_int(&kd, cell, realm_hint, uid, homedir);
 118 }
 119
 120 int
 121 krb_afslog_uid(const char *cell, const char *realm_hint, uid_t uid)
 122 {
 123     return krb_afslog_uid_home(cell, realm_hint, uid, NULL);
 124 }
 125
 126 int
 127 krb_afslog(const char *cell, const char *realm_hint)
 128 {
 129     return krb_afslog_uid(cell, realm_hint, getuid());
 130 }
 131
 132 int
 133 krb_afslog_home(const char *cell, const char *realm_hint, const char *homedir)
 134 {
 135     return krb_afslog_uid_home(cell, realm_hint, getuid(), homedir);
 136 }
 137
 138 /*
 139  *
 140  */
 141
 142 int
 143 krb_realm_of_cell(const char *cell, char **realm)
 144 {
 145     struct kafs_data kd;
 146
 147     kd.name = "krb4";
 148     kd.get_realm = get_realm;
 149     return _kafs_realm_of_cell(&kd, cell, realm);
 150 }
 151
 152 int
 153 kafs_settoken(const char *cell, uid_t uid, CREDENTIALS *c)
 154 {
 155     struct kafs_token kt;
 156     int ret;
 157
 158     kt.ticket = NULL;
 159
 160     ret = _kafs_v4_to_kt(c, uid, &kt);
 161     if (ret)
 162         return ret;
 163
 164     if (kt.ct.EndTimestamp < time(NULL)) {
 165         free(kt.ticket);
 166         return 0;
 167     }
 168
 169     ret = kafs_settoken_rxkad(cell, &kt.ct, kt.ticket, kt.ticket_len);
 170     free(kt.ticket);
 171     return ret;
 172 }
 173
 174 #else /* KRB4 */
 175
 176 #define KAFS_KRBET_KDC_SERVICE_EXP 39525378
 177
 178 int
 179 krb_afslog_uid_home(const char *cell, const char *realm_hint, uid_t uid,
 180                     const char *homedir)
 181 {
 182     return KAFS_KRBET_KDC_SERVICE_EXP;
 183 }
 184
 185 int
 186 krb_afslog_uid(const char *cell, const char *realm_hint, uid_t uid)
 187 {
 188     return KAFS_KRBET_KDC_SERVICE_EXP;
 189 }
 190
 191 int
 192 krb_afslog_home(const char *cell, const char *realm_hint, const char *homedir)
 193 {
 194     return KAFS_KRBET_KDC_SERVICE_EXP;
 195 }
 196
 197 int
 198 krb_afslog(const char *cell, const char *realm_hint)
 199 {
 200     return KAFS_KRBET_KDC_SERVICE_EXP;
 201 }
 202
 203 int
 204 krb_realm_of_cell(const char *cell, char **realm)
 205 {
 206     *realm = NULL;
 207     return KAFS_KRBET_KDC_SERVICE_EXP;
 208 }
 209
 210 int kafs_settoken (const char*, uid_t, struct credentials *);
 211
 212 int
 213 kafs_settoken(const char *cell, uid_t uid, struct credentials *c)
 214 {
 215     return KAFS_KRBET_KDC_SERVICE_EXP;
 216 }
 217
 218 #endif /* KRB4 */