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 #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->service_string) {
  95         ret = krb5_parse_name(kcc_context, opt->service_string, &ctx.mcreds.server);
  96         if (ret)
  97             krb5_err(kcc_context, 1, ret, "%s", opt->service_string);
  98     }
  99     if (opt->enctype_string) {
 100         krb5_enctype enctype;
 101         ret = krb5_string_to_enctype(kcc_context, opt->enctype_string, &enctype);
 102         if (ret)
 103             krb5_err(kcc_context, 1, ret, "%s", opt->enctype_string);
 104         ctx.whichfields |= KRB5_TC_MATCH_KEYTYPE;
 105         ctx.mcreds.session.keytype = enctype;
 106     }
 107     if (opt->flags_string) {
 108         parse_ticket_flags(kcc_context, opt->flags_string, &ctx.mcreds.flags);
 109         ctx.whichfields |= KRB5_TC_MATCH_FLAGS;
 110     }
 111     if (opt->valid_for_string) {
 112         time_t t = parse_time(opt->valid_for_string, "s");
 113         if(t < 0)
 114             errx(1, "unknown time \"%s\"", opt->valid_for_string);
 115         ctx.mcreds.times.endtime = time(NULL) + t;
 116         ctx.whichfields |= KRB5_TC_MATCH_TIMES;
 117     }
 118     if (opt->fcache_version_integer)
 119         krb5_set_fcache_version(kcc_context, opt->fcache_version_integer);
 120
 121     if (argc == 1) {
 122         from_name = krb5_cc_default_name(kcc_context);
 123         to_name = argv[0];
 124     } else {
 125         from_name = argv[0];
 126         to_name = argv[1];
 127     }
 128
 129     ret = krb5_cc_resolve(kcc_context, from_name, &from_ccache);
 130     if (ret)
 131         krb5_err(kcc_context, 1, ret, "%s", from_name);
 132
 133     if (opt->krbtgt_only_flag) {
 134         krb5_principal client;
 135         ret = krb5_cc_get_principal(kcc_context, from_ccache, &client);
 136         if (ret)
 137             krb5_err(kcc_context, 1, ret, "getting default principal");
 138         ret = krb5_make_principal(kcc_context, &ctx.mcreds.server,
 139                                   krb5_principal_get_realm(kcc_context, client),
 140                                   KRB5_TGS_NAME,
 141                                   krb5_principal_get_realm(kcc_context, client),
 142                                   NULL);
 143         if (ret)
 144             krb5_err(kcc_context, 1, ret, "constructing krbtgt principal");
 145         krb5_free_principal(kcc_context, client);
 146     }
 147     ret = krb5_cc_resolve(kcc_context, to_name, &to_ccache);
 148     if (ret)
 149         krb5_err(kcc_context, 1, ret, "%s", to_name);
 150
 151     ret = krb5_cc_copy_match_f(kcc_context, from_ccache, to_ccache,
 152                                matchfunc, &ctx, &matched);
 153     if (ret)
 154         krb5_err(kcc_context, 1, ret, "copying cred cache");
 155
 156     krb5_cc_close(kcc_context, from_ccache);
 157     if(matched == 0)
 158         krb5_cc_destroy(kcc_context, to_ccache);
 159     else
 160         krb5_cc_close(kcc_context, to_ccache);
 161
 162     return matched == 0;
 163 }