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  #include "kuser_locl.h"
 35  #include <config.h>
 36  #include <parse_units.h>
 37  #include <parse_time.h>
 38  #include "kcc-commands.h"
 39  
 40  static int32_t
 41  bitswap32(int32_t b)
 42  {
 43      int32_t r = 0;
 44      int i;
 45      for (i = 0; i < 32; i++) {
 46  	r = r << 1 | (b & 1);
 47  	b = b >> 1;
 48      }
 49      return r;
 50  }
 51  
 52  static void
 53  parse_ticket_flags(krb5_context context,
 54  		   const char *string, krb5_ticket_flags *ret_flags)
 55  {
 56      TicketFlags ff;
 57      int flags = parse_flags(string, asn1_TicketFlags_units(), 0);
 58      if (flags == -1)	/* XXX */
 59  	krb5_errx(context, 1, "bad flags specified: \"%s\"", string);
 60  
 61      memset(&ff, 0, sizeof(ff));
 62      ff.proxy = 1;
 63      if ((size_t)parse_flags("proxy", asn1_TicketFlags_units(), 0) == TicketFlags2int(ff))
 64  	ret_flags->i = flags;
 65      else
 66  	ret_flags->i = bitswap32(flags);
 67  }
 68  
 69  struct ctx {
 70      krb5_flags whichfields;
 71      krb5_creds mcreds;
 72  };
 73  
 74  static krb5_boolean
 75  matchfunc(krb5_context context, void *ptr, const krb5_creds *creds)
 76  {
 77      struct ctx *ctx = ptr;
 78      if (krb5_compare_creds(context, ctx->whichfields, &ctx->mcreds, creds))
 79  	return TRUE;
 80      return FALSE;
 81  }
 82  
 83  int
 84  copy_cred_cache(struct copy_cred_cache_options *opt, int argc, char **argv)
 85  {
 86      krb5_error_code ret;
 87      const char *from_name, *to_name;
 88      krb5_ccache from_ccache, to_ccache;
 89      unsigned int matched;
 90      struct ctx ctx;
 91  
 92      memset(&ctx, 0, sizeof(ctx));
 93  
 94      if(opt->version_flag) {
 95  	print_version(NULL);
 96  	exit(0);
 97      }
 98  
 99      if (opt->service_string) {
100  	ret = krb5_parse_name(kcc_context, opt->service_string, &ctx.mcreds.server);
101  	if (ret)
102  	    krb5_err(kcc_context, 1, ret, "%s", opt->service_string);
103      }
104      if (opt->enctype_string) {
105  	krb5_enctype enctype;
106  	ret = krb5_string_to_enctype(kcc_context, opt->enctype_string, &enctype);
107  	if (ret)
108  	    krb5_err(kcc_context, 1, ret, "%s", opt->enctype_string);
109  	ctx.whichfields |= KRB5_TC_MATCH_KEYTYPE;
110  	ctx.mcreds.session.keytype = enctype;
111      }
112      if (opt->flags_string) {
113  	parse_ticket_flags(kcc_context, opt->flags_string, &ctx.mcreds.flags);
114  	ctx.whichfields |= KRB5_TC_MATCH_FLAGS;
115      }
116      if (opt->valid_for_string) {
117  	time_t t = parse_time(opt->valid_for_string, "s");
118  	if(t < 0)
119  	    errx(1, "unknown time \"%s\"", opt->valid_for_string);
120  	ctx.mcreds.times.endtime = time(NULL) + t;
121  	ctx.whichfields |= KRB5_TC_MATCH_TIMES;
122      }
123      if (opt->fcache_version_integer)
124  	krb5_set_fcache_version(kcc_context, opt->fcache_version_integer);
125  
126      if (argc == 1) {
127  	from_name = krb5_cc_default_name(kcc_context);
128  	to_name = argv[0];
129      } else {
130  	from_name = argv[0];
131  	to_name = argv[1];
132      }
133  
134      ret = krb5_cc_resolve(kcc_context, from_name, &from_ccache);
135      if (ret)
136  	krb5_err(kcc_context, 1, ret, "%s", from_name);
137  
138      if (opt->krbtgt_only_flag) {
139  	krb5_principal client;
140  	ret = krb5_cc_get_principal(kcc_context, from_ccache, &client);
141  	if (ret)
142  	    krb5_err(kcc_context, 1, ret, "getting default principal");
143  	ret = krb5_make_principal(kcc_context, &ctx.mcreds.server,
144  				  krb5_principal_get_realm(kcc_context, client),
145  				  KRB5_TGS_NAME,
146  				  krb5_principal_get_realm(kcc_context, client),
147  				  NULL);
148  	if (ret)
149  	    krb5_err(kcc_context, 1, ret, "constructing krbtgt principal");
150  	krb5_free_principal(kcc_context, client);
151      }
152      ret = krb5_cc_resolve(kcc_context, to_name, &to_ccache);
153      if (ret)
154  	krb5_err(kcc_context, 1, ret, "%s", to_name);
155  
156      ret = krb5_cc_copy_match_f(kcc_context, from_ccache, to_ccache,
157  			       matchfunc, &ctx, &matched);
158      if (ret)
159  	krb5_err(kcc_context, 1, ret, "copying cred cache");
160  
161      krb5_cc_close(kcc_context, from_ccache);
162      if(matched == 0)
163  	krb5_cc_destroy(kcc_context, to_ccache);
164      else
165  	krb5_cc_close(kcc_context, to_ccache);
166  
167      return matched == 0;
168  }