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 /* XXX This is broken: what if the princ name has a \n?! */
 101 static int
 102 my_fgetln(FILE *f, char **buf, size_t *sz, size_t *len)
 103 {
 104     char *p, *n;
 105
 106     if (!*buf) {
 107         *buf = malloc(*sz ? *sz : 2048);
 108         if (!*buf)
 109             return ENOMEM;
 110         if (!*sz)
 111             *sz = 2048;
 112     }
 113     *len = 0;
 114     while ((p = fgets(&(*buf)[*len], *sz - *len, f))) {
 115         *len = strlen(*buf);
 116         if (feof(f))
 117             return 0;
 118         if (strchr(*buf, '\n'))
 119             return 0;
 120         n = realloc(*buf, *sz + (*sz >> 1));
 121         if (!n) {
 122             free(*buf);
 123             *buf = NULL;
 124             *sz = 0;
 125             *len = 0;
 126             return ENOMEM;
 127         }
 128         *buf = n;
 129         *sz += *sz >> 1;
 130     }
 131     return 0; /* *len == 0 || no EOL -> EOF */
 132 }
 133
 134 int
 135 mit_prop_dump(void *arg, const char *file)
 136 {
 137     krb5_error_code ret;
 138     size_t line_bufsz = 0;
 139     size_t line_len = 0;
 140     char *line = NULL;
 141     int lineno = 0;
 142     FILE *f;
 143     struct hdb_entry_ex ent;
 144     struct prop_data *pd = arg;
 145     krb5_storage *sp = NULL;
 146     krb5_data kdb_ent;
 147
 148     memset(&ent, 0, sizeof (ent));
 149     f = fopen(file, "r");
 150     if (f == NULL)
 151         return errno;
 152
 153     ret = ENOMEM;
 154     sp = krb5_storage_emem();
 155     if (!sp)
 156         goto out;
 157     while ((ret = my_fgetln(f, &line, &line_bufsz, &line_len)) == 0 &&
 158            !feof(f)) {
 159         char *p = line;
 160         char *q;
 161         lineno++;
 162
 163         if(strncmp(line, "kdb5_util", strlen("kdb5_util")) == 0) {
 164             int major;
 165             q = nexttoken(&p);
 166             if (strcmp(q, "kdb5_util"))
 167                 errx(1, "line %d: unknown version", lineno);
 168             q = nexttoken(&p); /* load_dump */
 169             if (strcmp(q, "load_dump"))
 170                 errx(1, "line %d: unknown version", lineno);
 171             q = nexttoken(&p); /* load_dump */
 172             if (strcmp(q, "version"))
 173                 errx(1, "line %d: unknown version", lineno);
 174             q = nexttoken(&p); /* x.0 */
 175             if (sscanf(q, "%d", &major) != 1)
 176                 errx(1, "line %d: unknown version", lineno);
 177             if (major != 4 && major != 5 && major != 6)
 178                 errx(1, "unknown dump file format, got %d, expected 4-6",
 179                      major);
 180             continue;
 181         } else if(strncmp(p, "policy", strlen("policy")) == 0) {
 182             warnx("line: %d: ignoring policy (not supported)", lineno);
 183             continue;
 184         } else if(strncmp(p, "princ", strlen("princ")) != 0) {
 185             warnx("line %d: not a principal", lineno);
 186             continue;
 187         }
 188         krb5_storage_truncate(sp, 0);
 189         ret = _hdb_mit_dump2mitdb_entry(pd->context, line, sp);
 190         if (ret) {
 191             if (ret > 0)
 192                 warn("line: %d: failed to parse; ignoring", lineno);
 193             else
 194                 warnx("line: %d: failed to parse; ignoring", lineno);
 195             continue;
 196         }
 197         ret = krb5_storage_to_data(sp, &kdb_ent);
 198         if (ret) break;
 199         ret = _hdb_mdb_value2entry(pd->context, &kdb_ent, 0, &ent.entry);
 200         krb5_data_free(&kdb_ent);
 201         if (ret) {
 202             warnx("line: %d: failed to store; ignoring", lineno);
 203             continue;
 204         }
 205         ret = v5_prop(pd->context, NULL, &ent, arg);
 206         hdb_free_entry(pd->context, &ent);
 207         if (ret) break;
 208     }
 209
 210 out:
 211     fclose(f);
 212     free(line);
 213     if (sp)
 214         krb5_storage_free(sp);
 215     if (ret && ret == ENOMEM)
 216         errx(1, "out of memory");
 217     if (ret)
 218         errx(1, "line %d: problem parsing dump line", lineno);
 219     return ret;
 220 }
 221