kdc/mit_dump.c

   1 /*
   2  * Copyright (c) 2000 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 "hprop.h"
  35
  36 extern krb5_error_code _hdb_mdb_value2entry(krb5_context context,
  37                                             krb5_data *data,
  38                                             krb5_kvno target_kvno,
  39                                             hdb_entry *entry);
  40
  41 extern int _hdb_mit_dump2mitdb_entry(krb5_context context,
  42                                      char *line,
  43                                      krb5_storage *sp);
  44
  45
  46
  47 /*
  48 can have any number of princ stanzas.
  49 format is as follows (only \n indicates newlines)
  50 princ\t%d\t (%d is KRB5_KDB_V1_BASE_LENGTH, always 38)
  51 %d\t (strlen of principal e.g. shadow/foo@ANDREW.CMU.EDU)
  52 %d\t (number of tl_data)
  53 %d\t (number of key data, e.g. how many keys for this user)
  54 %d\t (extra data length)
  55 %s\t (principal name)
  56 %d\t (attributes)
  57 %d\t (max lifetime, seconds)
  58 %d\t (max renewable life, seconds)
  59 %d\t (expiration, seconds since epoch or 2145830400 for never)
  60 %d\t (password expiration, seconds, 0 for never)
  61 %d\t (last successful auth, seconds since epoch)
  62 %d\t (last failed auth, per above)
  63 %d\t (failed auth count)
  64 foreach tl_data 0 to number of tl_data - 1 as above
  65   %d\t%d\t (data type, data length)
  66   foreach tl_data 0 to length-1
  67     %02x (tl data contents[element n])
  68   except if tl_data length is 0
  69     %d (always -1)
  70   \t
  71 foreach key 0 to number of keys - 1 as above
  72   %d\t%d\t (key data version, kvno)
  73   foreach version 0 to key data version - 1 (a key or a salt)
  74     %d\t%d\t(data type for this key, data length for this key)
  75     foreach key data length 0 to length-1
  76       %02x (key data contents[element n])
  77     except if key_data length is 0
  78       %d (always -1)
  79     \t
  80 foreach extra data length 0 to length - 1
  81   %02x (extra data part)
  82 unless no extra data
  83   %d (always -1)
  84 ;\n
  85
  86 */
  87
  88 static char *
  89 nexttoken(char **p)
  90 {
  91     char *q;
  92     do {
  93         q = strsep(p, " \t");
  94     } while(q && *q == '\0');
  95     return q;
  96 }
  97
  98 #include <kadm5/admin.h>
  99
 100 static int
 101 my_fgetln(FILE *f, char **buf, size_t *sz, size_t *len)
 102 {
 103     char *p, *n;
 104
 105     if (!*buf) {
 106         *buf = malloc(*sz ? *sz : 2048);
 107         if (!*buf)
 108             return ENOMEM;
 109         if (!*sz)
 110             *sz = 2048;
 111     }
 112     *len = 0;
 113     while ((p = fgets(&(*buf)[*len], *sz, f))) {
 114         if (strcspn(*buf, "\r\n") || feof(f)) {
 115             *len = strlen(*buf);
 116             return 0;
 117         }
 118         *len += strlen(&(*buf)[*len]); /* *len should be == *sz */
 119         n = realloc(buf, *sz + (*sz >> 1));
 120         if (!n) {
 121             free(*buf);
 122             *buf = NULL;
 123             *sz = 0;
 124             *len = 0;
 125             return ENOMEM;
 126         }
 127         *buf = n;
 128         *sz += *sz >> 1;
 129     }
 130     return 0; /* *len == 0 || no EOL -> EOF */
 131 }
 132
 133 int
 134 mit_prop_dump(void *arg, const char *file)
 135 {
 136     krb5_error_code ret;
 137     size_t line_bufsz = 0;
 138     size_t line_len = 0;
 139     char *line = NULL;
 140     int lineno = 0;
 141     FILE *f;
 142     struct hdb_entry_ex ent;
 143     struct prop_data *pd = arg;
 144     krb5_storage *sp = NULL;
 145     krb5_data kdb_ent;
 146
 147     memset(&ent, 0, sizeof (ent));
 148     f = fopen(file, "r");
 149     if (f == NULL)
 150         return errno;
 151
 152     ret = ENOMEM;
 153     sp = krb5_storage_emem();
 154     if (!sp)
 155         goto out;
 156     while ((ret = my_fgetln(f, &line, &line_bufsz, &line_len)) == 0 &&
 157            !feof(f)) {
 158         char *p = line;
 159         char *q;
 160         lineno++;
 161
 162         if(strncmp(line, "kdb5_util", strlen("kdb5_util")) == 0) {
 163             int major;
 164             q = nexttoken(&p);
 165             if (strcmp(q, "kdb5_util"))
 166                 errx(1, "line %d: unknown version", lineno);
 167             q = nexttoken(&p); /* load_dump */
 168             if (strcmp(q, "load_dump"))
 169                 errx(1, "line %d: unknown version", lineno);
 170             q = nexttoken(&p); /* load_dump */
 171             if (strcmp(q, "version"))
 172                 errx(1, "line %d: unknown version", lineno);
 173             q = nexttoken(&p); /* x.0 */
 174             if (sscanf(q, "%d", &major) != 1)
 175                 errx(1, "line %d: unknown version", lineno);
 176             if (major != 4 && major != 5 && major != 6)
 177                 errx(1, "unknown dump file format, got %d, expected 4-6",
 178                      major);
 179             continue;
 180         } else if(strncmp(p, "policy", strlen("policy")) == 0) {
 181             warnx("line: %d: ignoring policy (not supported)", lineno);
 182             continue;
 183         } else if(strncmp(p, "princ", strlen("princ")) != 0) {
 184             warnx("line %d: not a principal", lineno);
 185             continue;
 186         }
 187         krb5_storage_truncate(sp, 0);
 188         ret = _hdb_mit_dump2mitdb_entry(pd->context, line, sp);
 189         if (ret) {
 190             warnx("line: %d: failed to parse; ignoring", lineno);
 191             continue;
 192         }
 193         ret = krb5_storage_to_data(sp, &kdb_ent);
 194         if (ret) break;
 195         ret = _hdb_mdb_value2entry(pd->context, &kdb_ent, 0, &ent.entry);
 196         krb5_data_free(&kdb_ent);
 197         if (ret) {
 198             warnx("line: %d: failed to store; ignoring", lineno);
 199             continue;
 200         }
 201         ret = v5_prop(pd->context, NULL, &ent, arg);
 202         hdb_free_entry(pd->context, &ent);
 203         if (ret) break;
 204     }
 205
 206 out:
 207     fclose(f);
 208     free(line);
 209     if (sp)
 210         krb5_storage_free(sp);
 211     if (ret && ret == ENOMEM)
 212         errx(1, "out of memory");
 213     if (ret)
 214         errx(1, "line %d: problem parsing dump line", lineno);
 215     return ret;
 216 }
 217