lib/hdb/print.c

   1 /*
   2  * Copyright (c) 1999-2005 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 KTH nor the names of its contributors may be
  18  *    used to endorse or promote products derived from this software without
  19  *    specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  22  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
  32
  33 #include "hdb_locl.h"
  34 #include <hex.h>
  35 #include <ctype.h>
  36
  37 /*
  38    This is the present contents of a dump line. This might change at
  39    any time. Fields are separated by white space.
  40
  41   principal
  42   keyblock
  43         kvno
  44         keys...
  45                 mkvno
  46                 enctype
  47                 keyvalue
  48                 salt (- means use normal salt)
  49   creation date and principal
  50   modification date and principal
  51   principal valid from date (not used)
  52   principal valid end date (not used)
  53   principal key expires (not used)
  54   max ticket life
  55   max renewable life
  56   flags
  57   generation number
  58   */
  59
  60 static krb5_error_code
  61 append_string(krb5_context context, krb5_storage *sp, const char *fmt, ...)
  62 {
  63     krb5_error_code ret;
  64     char *s;
  65     va_list ap;
  66     va_start(ap, fmt);
  67     vasprintf(&s, fmt, ap);
  68     va_end(ap);
  69     if(s == NULL) {
  70         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
  71         return ENOMEM;
  72     }
  73     ret = krb5_storage_write(sp, s, strlen(s));
  74     free(s);
  75     return ret;
  76 }
  77
  78 static krb5_error_code
  79 append_hex(krb5_context context, krb5_storage *sp, krb5_data *data)
  80 {
  81     int printable = 1;
  82     size_t i;
  83     char *p;
  84
  85     p = data->data;
  86     for(i = 0; i < data->length; i++)
  87         if(!isalnum((unsigned char)p[i]) && p[i] != '.'){
  88             printable = 0;
  89             break;
  90         }
  91     if(printable)
  92         return append_string(context, sp, "\"%.*s\"",
  93                              data->length, data->data);
  94     hex_encode(data->data, data->length, &p);
  95     append_string(context, sp, "%s", p);
  96     free(p);
  97     return 0;
  98 }
  99
 100 static char *
 101 time2str(time_t t)
 102 {
 103     static char buf[128];
 104     strftime(buf, sizeof(buf), "%Y%m%d%H%M%S", gmtime(&t));
 105     return buf;
 106 }
 107
 108 static krb5_error_code
 109 append_event(krb5_context context, krb5_storage *sp, Event *ev)
 110 {
 111     char *pr = NULL;
 112     krb5_error_code ret;
 113     if(ev == NULL)
 114         return append_string(context, sp, "- ");
 115     if (ev->principal != NULL) {
 116        ret = krb5_unparse_name(context, ev->principal, &pr);
 117        if(ret)
 118            return ret;
 119     }
 120     ret = append_string(context, sp, "%s:%s ",
 121                         time2str(ev->time), pr ? pr : "UNKNOWN");
 122     free(pr);
 123     return ret;
 124 }
 125
 126 static krb5_error_code
 127 entry2string_int (krb5_context context, krb5_storage *sp, hdb_entry *ent)
 128 {
 129     char *p;
 130     size_t i;
 131     krb5_error_code ret;
 132
 133     /* --- principal */
 134     ret = krb5_unparse_name(context, ent->principal, &p);
 135     if(ret)
 136         return ret;
 137     append_string(context, sp, "%s ", p);
 138     free(p);
 139     /* --- kvno */
 140     append_string(context, sp, "%d", ent->kvno);
 141     /* --- keys */
 142     for(i = 0; i < ent->keys.len; i++){
 143         /* --- mkvno, keytype */
 144         if(ent->keys.val[i].mkvno)
 145             append_string(context, sp, ":%d:%d:",
 146                           *ent->keys.val[i].mkvno,
 147                           ent->keys.val[i].key.keytype);
 148         else
 149             append_string(context, sp, "::%d:",
 150                           ent->keys.val[i].key.keytype);
 151         /* --- keydata */
 152         append_hex(context, sp, &ent->keys.val[i].key.keyvalue);
 153         append_string(context, sp, ":");
 154         /* --- salt */
 155         if(ent->keys.val[i].salt){
 156             append_string(context, sp, "%u/", ent->keys.val[i].salt->type);
 157             append_hex(context, sp, &ent->keys.val[i].salt->salt);
 158         }else
 159             append_string(context, sp, "-");
 160     }
 161     append_string(context, sp, " ");
 162     /* --- created by */
 163     append_event(context, sp, &ent->created_by);
 164     /* --- modified by */
 165     append_event(context, sp, ent->modified_by);
 166
 167     /* --- valid start */
 168     if(ent->valid_start)
 169         append_string(context, sp, "%s ", time2str(*ent->valid_start));
 170     else
 171         append_string(context, sp, "- ");
 172
 173     /* --- valid end */
 174     if(ent->valid_end)
 175         append_string(context, sp, "%s ", time2str(*ent->valid_end));
 176     else
 177         append_string(context, sp, "- ");
 178
 179     /* --- password ends */
 180     if(ent->pw_end)
 181         append_string(context, sp, "%s ", time2str(*ent->pw_end));
 182     else
 183         append_string(context, sp, "- ");
 184
 185     /* --- max life */
 186     if(ent->max_life)
 187         append_string(context, sp, "%d ", *ent->max_life);
 188     else
 189         append_string(context, sp, "- ");
 190
 191     /* --- max renewable life */
 192     if(ent->max_renew)
 193         append_string(context, sp, "%d ", *ent->max_renew);
 194     else
 195         append_string(context, sp, "- ");
 196
 197     /* --- flags */
 198     append_string(context, sp, "%d ", HDBFlags2int(ent->flags));
 199
 200     /* --- generation number */
 201     if(ent->generation) {
 202         append_string(context, sp, "%s:%d:%d ", time2str(ent->generation->time),
 203                       ent->generation->usec,
 204                       ent->generation->gen);
 205     } else
 206         append_string(context, sp, "- ");
 207
 208     /* --- extensions */
 209     if(ent->extensions && ent->extensions->len > 0) {
 210         for(i = 0; i < ent->extensions->len; i++) {
 211             void *d;
 212             size_t size, sz = 0;
 213
 214             ASN1_MALLOC_ENCODE(HDB_extension, d, size,
 215                                &ent->extensions->val[i], &sz, ret);
 216             if (ret) {
 217                 krb5_clear_error_message(context);
 218                 return ret;
 219             }
 220             if(size != sz)
 221                 krb5_abortx(context, "internal asn.1 encoder error");
 222
 223             if (hex_encode(d, size, &p) < 0) {
 224                 free(d);
 225                 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 226                 return ENOMEM;
 227             }
 228
 229             free(d);
 230             append_string(context, sp, "%s%s", p,
 231                           ent->extensions->len - 1 != i ? ":" : "");
 232             free(p);
 233         }
 234     } else
 235         append_string(context, sp, "-");
 236
 237
 238     return 0;
 239 }
 240
 241 krb5_error_code
 242 hdb_entry2string (krb5_context context, hdb_entry *ent, char **str)
 243 {
 244     krb5_error_code ret;
 245     krb5_data data;
 246     krb5_storage *sp;
 247
 248     sp = krb5_storage_emem();
 249     if(sp == NULL) {
 250         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 251         return ENOMEM;
 252     }
 253
 254     ret = entry2string_int(context, sp, ent);
 255     if(ret) {
 256         krb5_storage_free(sp);
 257         return ret;
 258     }
 259
 260     krb5_storage_write(sp, "\0", 1);
 261     krb5_storage_to_data(sp, &data);
 262     krb5_storage_free(sp);
 263     *str = data.data;
 264     return 0;
 265 }
 266
 267 /* print a hdb_entry to (FILE*)data; suitable for hdb_foreach */
 268
 269 krb5_error_code
 270 hdb_print_entry(krb5_context context, HDB *db, hdb_entry_ex *entry, void *data)
 271 {
 272     krb5_error_code ret;
 273     krb5_storage *sp;
 274
 275     FILE *f = data;
 276
 277     fflush(f);
 278     sp = krb5_storage_from_fd(fileno(f));
 279     if(sp == NULL) {
 280         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
 281         return ENOMEM;
 282     }
 283
 284     ret = entry2string_int(context, sp, &entry->entry);
 285     if(ret) {
 286         krb5_storage_free(sp);
 287         return ret;
 288     }
 289
 290     krb5_storage_write(sp, "\n", 1);
 291     krb5_storage_free(sp);
 292     return 0;
 293 }