crypto/external/bsd/heimdal/dist/kuser/copy_cred_cache.c

   1 /*      $NetBSD: copy_cred_cache.c,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $   */
   2
   3 /*
   4  * Copyright (c) 2004 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "kuser_locl.h"
  37 #include <config.h>
  38 #include <krb5/parse_units.h>
  39 #include <krb5/parse_time.h>
  40 #include "kcc-commands.h"
  41
  42 static int32_t
  43 bitswap32(int32_t b)
  44 {
  45     int32_t r = 0;
  46     int i;
  47     for (i = 0; i < 32; i++) {
  48         r = r << 1 | (b & 1);
  49         b = b >> 1;
  50     }
  51     return r;
  52 }
  53
  54 static void
  55 parse_ticket_flags(krb5_context context,
  56                    const char *string, krb5_ticket_flags *ret_flags)
  57 {
  58     TicketFlags ff;
  59     int flags = parse_flags(string, asn1_TicketFlags_units(), 0);
  60     if (flags == -1)    /* XXX */
  61         krb5_errx(context, 1, "bad flags specified: \"%s\"", string);
  62
  63     memset(&ff, 0, sizeof(ff));
  64     ff.proxy = 1;
  65     if ((size_t)parse_flags("proxy", asn1_TicketFlags_units(), 0) == TicketFlags2int(ff))
  66         ret_flags->i = flags;
  67     else
  68         ret_flags->i = bitswap32(flags);
  69 }
  70
  71 struct ctx {
  72     krb5_flags whichfields;
  73     krb5_creds mcreds;
  74 };
  75
  76 static krb5_boolean
  77 matchfunc(krb5_context context, void *ptr, const krb5_creds *creds)
  78 {
  79     struct ctx *ctx = ptr;
  80     if (krb5_compare_creds(context, ctx->whichfields, &ctx->mcreds, creds))
  81         return TRUE;
  82     return FALSE;
  83 }
  84
  85 int
  86 copy_cred_cache(struct copy_cred_cache_options *opt, int argc, char **argv)
  87 {
  88     krb5_error_code ret;
  89     const char *from_name, *to_name;
  90     krb5_ccache from_ccache, to_ccache;
  91     unsigned int matched;
  92     struct ctx ctx;
  93
  94     memset(&ctx, 0, sizeof(ctx));
  95
  96     if (opt->service_string) {
  97         ret = krb5_parse_name(kcc_context, opt->service_string, &ctx.mcreds.server);
  98         if (ret)
  99             krb5_err(kcc_context, 1, ret, "%s", opt->service_string);
 100     }
 101     if (opt->enctype_string) {
 102         krb5_enctype enctype;
 103         ret = krb5_string_to_enctype(kcc_context, opt->enctype_string, &enctype);
 104         if (ret)
 105             krb5_err(kcc_context, 1, ret, "%s", opt->enctype_string);
 106         ctx.whichfields |= KRB5_TC_MATCH_KEYTYPE;
 107         ctx.mcreds.session.keytype = enctype;
 108     }
 109     if (opt->flags_string) {
 110         parse_ticket_flags(kcc_context, opt->flags_string, &ctx.mcreds.flags);
 111         ctx.whichfields |= KRB5_TC_MATCH_FLAGS;
 112     }
 113     if (opt->valid_for_string) {
 114         time_t t = parse_time(opt->valid_for_string, "s");
 115         if(t < 0)
 116             errx(1, "unknown time \"%s\"", opt->valid_for_string);
 117         ctx.mcreds.times.endtime = time(NULL) + t;
 118         ctx.whichfields |= KRB5_TC_MATCH_TIMES;
 119     }
 120     if (opt->fcache_version_integer)
 121         krb5_set_fcache_version(kcc_context, opt->fcache_version_integer);
 122
 123     if (argc == 1) {
 124         from_name = krb5_cc_default_name(kcc_context);
 125         to_name = argv[0];
 126     } else {
 127         from_name = argv[0];
 128         to_name = argv[1];
 129     }
 130
 131     ret = krb5_cc_resolve(kcc_context, from_name, &from_ccache);
 132     if (ret)
 133         krb5_err(kcc_context, 1, ret, "%s", from_name);
 134
 135     if (opt->krbtgt_only_flag) {
 136         krb5_principal client;
 137         ret = krb5_cc_get_principal(kcc_context, from_ccache, &client);
 138         if (ret)
 139             krb5_err(kcc_context, 1, ret, "getting default principal");
 140         ret = krb5_make_principal(kcc_context, &ctx.mcreds.server,
 141                                   krb5_principal_get_realm(kcc_context, client),
 142                                   KRB5_TGS_NAME,
 143                                   krb5_principal_get_realm(kcc_context, client),
 144                                   NULL);
 145         if (ret)
 146             krb5_err(kcc_context, 1, ret, "constructing krbtgt principal");
 147         krb5_free_principal(kcc_context, client);
 148     }
 149     ret = krb5_cc_resolve(kcc_context, to_name, &to_ccache);
 150     if (ret)
 151         krb5_err(kcc_context, 1, ret, "%s", to_name);
 152
 153     ret = krb5_cc_copy_match_f(kcc_context, from_ccache, to_ccache,
 154                                matchfunc, &ctx, &matched);
 155     if (ret)
 156         krb5_err(kcc_context, 1, ret, "copying cred cache");
 157
 158     krb5_cc_close(kcc_context, from_ccache);
 159     if(matched == 0)
 160         krb5_cc_destroy(kcc_context, to_ccache);
 161     else
 162         krb5_cc_close(kcc_context, to_ccache);
 163
 164     return matched == 0;
 165 }