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: Principal names with '\n' cannot be dumped or loaded */
 101 static int
 102 my_fgetln(FILE *f, char **bufp, size_t *szp, size_t *lenp)
 103 {
 104     size_t len;
 105     size_t sz = *szp;
 106     char *buf = *bufp;
 107     char *n;
 108
 109     if (!buf) {
 110         buf = malloc(sz ? sz : 8192);
 111         if (!buf)
 112             return ENOMEM;
 113         if (!sz)
 114             sz = 8192;
 115     }
 116
 117     len = 0;
 118     while (fgets(&buf[len], sz-len, f) != NULL) {
 119         len += strlen(&buf[len]);
 120         if (buf[len-1] == '\n')
 121             break;
 122         if (feof(f))
 123             break;
 124         if (sz > SIZE_MAX/2 ||
 125             (n = realloc(buf, sz += 1 + (sz >> 1))) == NULL) {
 126             free(buf);
 127             *bufp = NULL;
 128             *szp = 0;
 129             *lenp = 0;
 130             return ENOMEM;
 131         }
 132         buf = n;
 133     }
 134     *bufp = buf;
 135     *szp = sz;
 136     *lenp = len;
 137     return 0; /* *len == 0 || no EOL -> EOF */
 138 }
 139
 140 int
 141 mit_prop_dump(void *arg, const char *file)
 142 {
 143     krb5_error_code ret;
 144     size_t line_bufsz = 0;
 145     size_t line_len = 0;
 146     char *line = NULL;
 147     int lineno = 0;
 148     FILE *f;
 149     hdb_entry ent;
 150     struct prop_data *pd = arg;
 151     krb5_storage *sp = NULL;
 152     krb5_data kdb_ent;
 153
 154     memset(&ent, 0, sizeof (ent));
 155     f = fopen(file, "r");
 156     if (f == NULL)
 157         return errno;
 158
 159     ret = ENOMEM;
 160     sp = krb5_storage_emem();
 161     if (!sp)
 162         goto out;
 163     while ((ret = my_fgetln(f, &line, &line_bufsz, &line_len)) == 0 &&
 164            line_len > 0) {
 165         char *p = line;
 166         char *q;
 167
 168         lineno++;
 169         if(strncmp(line, "kdb5_util", strlen("kdb5_util")) == 0) {
 170             int major;
 171             q = nexttoken(&p);
 172             if (strcmp(q, "kdb5_util") != 0)
 173                 errx(1, "line %d: unknown version", lineno);
 174             q = nexttoken(&p); /* load_dump */
 175             if (strcmp(q, "load_dump") != 0)
 176                 errx(1, "line %d: unknown version", lineno);
 177             q = nexttoken(&p); /* load_dump */
 178             if (strcmp(q, "version") != 0)
 179                 errx(1, "line %d: unknown version", lineno);
 180             q = nexttoken(&p); /* x.0 */
 181             if (sscanf(q, "%d", &major) != 1)
 182                 errx(1, "line %d: unknown version", lineno);
 183             if (major != 4 && major != 5 && major != 6)
 184                 errx(1, "unknown dump file format, got %d, expected 4-6",
 185                      major);
 186             continue;
 187         } else if(strncmp(p, "policy", strlen("policy")) == 0) {
 188             warnx("line: %d: ignoring policy (not supported)", lineno);
 189             continue;
 190         } else if(strncmp(p, "princ", strlen("princ")) != 0) {
 191             warnx("line %d: not a principal", lineno);
 192             continue;
 193         }
 194         krb5_storage_truncate(sp, 0);
 195         ret = _hdb_mit_dump2mitdb_entry(pd->context, line, sp);
 196         if (ret) {
 197             if (ret > 0)
 198                 warn("line: %d: failed to parse; ignoring", lineno);
 199             else
 200                 warnx("line: %d: failed to parse; ignoring", lineno);
 201             continue;
 202         }
 203         ret = krb5_storage_to_data(sp, &kdb_ent);
 204         if (ret) break;
 205         ret = _hdb_mdb_value2entry(pd->context, &kdb_ent, 0, &ent);
 206         krb5_data_free(&kdb_ent);
 207         if (ret) {
 208             warnx("line: %d: failed to store; ignoring", lineno);
 209             continue;
 210         }
 211         ret = v5_prop(pd->context, NULL, &ent, arg);
 212         hdb_free_entry(pd->context, NULL, &ent); /* XXX */
 213         if (ret) break;
 214     }
 215
 216 out:
 217     fclose(f);
 218     free(line);
 219     if (sp)
 220         krb5_storage_free(sp);
 221     if (ret && ret == ENOMEM)
 222         errx(1, "out of memory");
 223     if (ret)
 224         errx(1, "line %d: problem parsing dump line", lineno);
 225     return ret;
 226 }
 227