crypto/dist/heimdal/kuser/copy_cred_cache.c

   1 /*
   2  * Copyright (c) 2004 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 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 __RCSID("$Heimdal: copy_cred_cache.c 15542 2005-07-01 07:20:54Z lha $"
  37         "$NetBSD$");
  38 #endif
  39
  40 #include <stdlib.h>
  41 #include <krb5.h>
  42 #include <roken.h>
  43 #include <getarg.h>
  44 #include <parse_units.h>
  45 #include <parse_time.h>
  46
  47 static int krbtgt_only_flag;
  48 static char *service_string;
  49 static char *enctype_string;
  50 static char *flags_string;
  51 static char *valid_string;
  52 static int fcache_version;
  53 static int help_flag;
  54 static int version_flag;
  55
  56 static struct getargs args[] = {
  57     { "krbtgt-only", 0, arg_flag, &krbtgt_only_flag,
  58       "only copy local krbtgt" },
  59     { "service", 0, arg_string, &service_string,
  60       "limit to this service", "principal" },
  61     { "enctype", 0, arg_string, &enctype_string,
  62       "limit to this enctype", "enctype" },
  63     { "flags", 0, arg_string, &flags_string,
  64       "limit to these flags", "ticketflags" },
  65     { "valid-for", 0, arg_string, &valid_string,
  66       "limit to creds valid for at least this long", "time" },
  67     { "fcache-version", 0, arg_integer, &fcache_version,
  68       "file cache version to create" },
  69     { "version", 0, arg_flag, &version_flag },
  70     { "help", 'h', arg_flag, &help_flag }
  71 };
  72
  73 static void
  74 usage(int ret)
  75 {
  76     arg_printusage(args,
  77                    sizeof(args) / sizeof(*args),
  78                    NULL,
  79                    "[from-cache] to-cache");
  80     exit(ret);
  81 }
  82
  83 static int32_t
  84 bitswap32(int32_t b)
  85 {
  86     int32_t r = 0;
  87     int i;
  88     for (i = 0; i < 32; i++) {
  89         r = r << 1 | (b & 1);
  90         b = b >> 1;
  91     }
  92     return r;
  93 }
  94
  95 static void
  96 parse_ticket_flags(krb5_context context,
  97                    const char *string, krb5_ticket_flags *ret_flags)
  98 {
  99     TicketFlags ff;
 100     int flags = parse_flags(string, asn1_TicketFlags_units(), 0);
 101     if (flags == -1)    /* XXX */
 102         krb5_errx(context, 1, "bad flags specified: \"%s\"", string);
 103
 104     memset(&ff, 0, sizeof(ff));
 105     ff.proxy = 1;
 106     if (parse_flags("proxy", asn1_TicketFlags_units(), 0) == TicketFlags2int(ff))
 107         ret_flags->i = flags;
 108     else
 109         ret_flags->i = bitswap32(flags);
 110 }
 111
 112 int
 113 main(int argc, char **argv)
 114 {
 115     krb5_error_code ret;
 116     krb5_context context;
 117     int optidx = 0;
 118     const char *from_name, *to_name;
 119     krb5_ccache from_ccache, to_ccache;
 120     krb5_flags whichfields = 0;
 121     krb5_creds mcreds;
 122     unsigned int matched;
 123
 124     setprogname(argv[0]);
 125
 126     memset(&mcreds, 0, sizeof(mcreds));
 127
 128     if (getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 129         usage(1);
 130
 131     if (help_flag)
 132         usage(0);
 133
 134     if (version_flag) {
 135         print_version(NULL);
 136         exit(0);
 137     }
 138     argc -= optidx;
 139     argv += optidx;
 140
 141     if (argc < 1 || argc > 2)
 142         usage(1);
 143
 144     if (krb5_init_context(&context))
 145         errx(1, "krb5_init_context failed");
 146
 147     if (service_string) {
 148         ret = krb5_parse_name(context, service_string, &mcreds.server);
 149         if (ret)
 150             krb5_err(context, 1, ret, "%s", service_string);
 151     }
 152     if (enctype_string) {
 153         krb5_enctype enctype;
 154         ret = krb5_string_to_enctype(context, enctype_string, &enctype);
 155         if (ret)
 156             krb5_err(context, 1, ret, "%s", enctype_string);
 157         whichfields |= KRB5_TC_MATCH_KEYTYPE;
 158         mcreds.session.keytype = enctype;
 159     }
 160     if (flags_string) {
 161         parse_ticket_flags(context, flags_string, &mcreds.flags);
 162         whichfields |= KRB5_TC_MATCH_FLAGS;
 163     }
 164     if (valid_string) {
 165         time_t t = parse_time(valid_string, "s");
 166         if(t < 0)
 167             errx(1, "unknown time \"%s\"", valid_string);
 168         mcreds.times.endtime = time(NULL) + t;
 169         whichfields |= KRB5_TC_MATCH_TIMES;
 170     }
 171     if (fcache_version)
 172         krb5_set_fcache_version(context, fcache_version);
 173
 174     if (argc == 1) {
 175         from_name = krb5_cc_default_name(context);
 176         to_name = argv[0];
 177     } else {
 178         from_name = argv[0];
 179         to_name = argv[1];
 180     }
 181
 182     ret = krb5_cc_resolve(context, from_name, &from_ccache);
 183     if (ret)
 184         krb5_err(context, 1, ret, "%s", from_name);
 185
 186     if (krbtgt_only_flag) {
 187         krb5_principal client;
 188         ret = krb5_cc_get_principal(context, from_ccache, &client);
 189         if (ret)
 190             krb5_err(context, 1, ret, "getting default principal");
 191         ret = krb5_make_principal(context, &mcreds.server,
 192                                   krb5_principal_get_realm(context, client),
 193                                   KRB5_TGS_NAME,
 194                                   krb5_principal_get_realm(context, client),
 195                                   NULL);
 196         if (ret)
 197             krb5_err(context, 1, ret, "constructing krbtgt principal");
 198         krb5_free_principal(context, client);
 199     }
 200     ret = krb5_cc_resolve(context, to_name, &to_ccache);
 201     if (ret)
 202         krb5_err(context, 1, ret, "%s", to_name);
 203
 204     ret = krb5_cc_copy_cache_match(context, from_ccache, to_ccache,
 205                                    whichfields, &mcreds, &matched);
 206     if (ret)
 207         krb5_err(context, 1, ret, "copying cred cache");
 208
 209     krb5_cc_close(context, from_ccache);
 210     if(matched == 0)
 211         krb5_cc_destroy(context, to_ccache);
 212     else
 213         krb5_cc_close(context, to_ccache);
 214     krb5_free_context(context);
 215     return matched == 0;
 216 }