1 /* 2 * Copyright (c) 2000 Kungliga Tekniska H�gskolan 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 RCSID("$Id: mit_dump.c 21745 2007-07-31 16:11:25Z lha $"); 37 38 /* 39 can have any number of princ stanzas. 40 format is as follows (only \n indicates newlines) 41 princ\t%d\t (%d is KRB5_KDB_V1_BASE_LENGTH, always 38) 42 %d\t (strlen of principal e.g. shadow/foo@ANDREW.CMU.EDU) 43 %d\t (number of tl_data) 44 %d\t (number of key data, e.g. how many keys for this user) 45 %d\t (extra data length) 46 %s\t (principal name) 47 %d\t (attributes) 48 %d\t (max lifetime, seconds) 49 %d\t (max renewable life, seconds) 50 %d\t (expiration, seconds since epoch or 2145830400 for never) 51 %d\t (password expiration, seconds, 0 for never) 52 %d\t (last successful auth, seconds since epoch) 53 %d\t (last failed auth, per above) 54 %d\t (failed auth count) 55 foreach tl_data 0 to number of tl_data - 1 as above 56 %d\t%d\t (data type, data length) 57 foreach tl_data 0 to length-1 58 %02x (tl data contents[element n]) 59 except if tl_data length is 0 60 %d (always -1) 61 \t 62 foreach key 0 to number of keys - 1 as above 63 %d\t%d\t (key data version, kvno) 64 foreach version 0 to key data version - 1 (a key or a salt) 65 %d\t%d\t(data type for this key, data length for this key) 66 foreach key data length 0 to length-1 67 %02x (key data contents[element n]) 68 except if key_data length is 0 69 %d (always -1) 70 \t 71 foreach extra data length 0 to length - 1 72 %02x (extra data part) 73 unless no extra data 74 %d (always -1) 75 ;\n 76 77 */ 78 79 static int 80 hex_to_octet_string(const char *ptr, krb5_data *data) 81 { 82 int i; 83 unsigned int v; 84 for(i = 0; i < data->length; i++) { 85 if(sscanf(ptr + 2 * i, "%02x", &v) != 1) 86 return -1; 87 ((unsigned char*)data->data)[i] = v; 88 } 89 return 2 * i; 90 } 91 92 static char * 93 nexttoken(char **p) 94 { 95 char *q; 96 do { 97 q = strsep(p, " \t"); 98 } while(q && *q == '\0'); 99 return q; 100 } 101 102 static size_t 103 getdata(char **p, unsigned char *buf, size_t len) 104 { 105 size_t i; 106 int v; 107 char *q = nexttoken(p); 108 i = 0; 109 while(*q && i < len) { 110 if(sscanf(q, "%02x", &v) != 1) 111 break; 112 buf[i++] = v; 113 q += 2; 114 } 115 return i; 116 } 117 118 static int 119 getint(char **p) 120 { 121 int val; 122 char *q = nexttoken(p); 123 sscanf(q, "%d", &val); 124 return val; 125 } 126 127 #include <kadm5/admin.h> 128 129 static void 130 attr_to_flags(unsigned attr, HDBFlags *flags) 131 { 132 flags->postdate = !(attr & KRB5_KDB_DISALLOW_POSTDATED); 133 flags->forwardable = !(attr & KRB5_KDB_DISALLOW_FORWARDABLE); 134 flags->initial = !!(attr & KRB5_KDB_DISALLOW_TGT_BASED); 135 flags->renewable = !(attr & KRB5_KDB_DISALLOW_RENEWABLE); 136 flags->proxiable = !(attr & KRB5_KDB_DISALLOW_PROXIABLE); 137 /* DUP_SKEY */ 138 flags->invalid = !!(attr & KRB5_KDB_DISALLOW_ALL_TIX); 139 flags->require_preauth = !!(attr & KRB5_KDB_REQUIRES_PRE_AUTH); 140 /* HW_AUTH */ 141 flags->server = !(attr & KRB5_KDB_DISALLOW_SVR); 142 flags->change_pw = !!(attr & KRB5_KDB_PWCHANGE_SERVICE); 143 flags->client = 1; /* XXX */ 144 } 145 146 #define KRB5_KDB_SALTTYPE_NORMAL 0 147 #define KRB5_KDB_SALTTYPE_V4 1 148 #define KRB5_KDB_SALTTYPE_NOREALM 2 149 #define KRB5_KDB_SALTTYPE_ONLYREALM 3 150 #define KRB5_KDB_SALTTYPE_SPECIAL 4 151 #define KRB5_KDB_SALTTYPE_AFS3 5 152 153 static krb5_error_code 154 fix_salt(krb5_context context, hdb_entry *ent, int key_num) 155 { 156 krb5_error_code ret; 157 Salt *salt = ent->keys.val[key_num].salt; 158 /* fix salt type */ 159 switch((int)salt->type) { 160 case KRB5_KDB_SALTTYPE_NORMAL: 161 salt->type = KRB5_PADATA_PW_SALT; 162 break; 163 case KRB5_KDB_SALTTYPE_V4: 164 krb5_data_free(&salt->salt); 165 salt->type = KRB5_PADATA_PW_SALT; 166 break; 167 case KRB5_KDB_SALTTYPE_NOREALM: 168 { 169 size_t len; 170 int i; 171 char *p; 172 173 len = 0; 174 for (i = 0; i < ent->principal->name.name_string.len; ++i) 175 len += strlen(ent->principal->name.name_string.val[i]); 176 ret = krb5_data_alloc (&salt->salt, len); 177 if (ret) 178 return ret; 179 p = salt->salt.data; 180 for (i = 0; i < ent->principal->name.name_string.len; ++i) { 181 memcpy (p, 182 ent->principal->name.name_string.val[i], 183 strlen(ent->principal->name.name_string.val[i])); 184 p += strlen(ent->principal->name.name_string.val[i]); 185 } 186 187 salt->type = KRB5_PADATA_PW_SALT; 188 break; 189 } 190 case KRB5_KDB_SALTTYPE_ONLYREALM: 191 krb5_data_free(&salt->salt); 192 ret = krb5_data_copy(&salt->salt, 193 ent->principal->realm, 194 strlen(ent->principal->realm)); 195 if(ret) 196 return ret; 197 salt->type = KRB5_PADATA_PW_SALT; 198 break; 199 case KRB5_KDB_SALTTYPE_SPECIAL: 200 salt->type = KRB5_PADATA_PW_SALT; 201 break; 202 case KRB5_KDB_SALTTYPE_AFS3: 203 krb5_data_free(&salt->salt); 204 ret = krb5_data_copy(&salt->salt, 205 ent->principal->realm, 206 strlen(ent->principal->realm)); 207 if(ret) 208 return ret; 209 salt->type = KRB5_PADATA_AFS3_SALT; 210 break; 211 default: 212 abort(); 213 } 214 return 0; 215 } 216 217 int 218 mit_prop_dump(void *arg, const char *file) 219 { 220 krb5_error_code ret; 221 char line [2048]; 222 FILE *f; 223 int lineno = 0; 224 struct hdb_entry_ex ent; 225 226 struct prop_data *pd = arg; 227 228 f = fopen(file, "r"); 229 if(f == NULL) 230 return errno; 231 232 while(fgets(line, sizeof(line), f)) { 233 char *p = line, *q; 234 235 int i; 236 237 int num_tl_data; 238 int num_key_data; 239 int extra_data_length; 240 int attributes; 241 242 int tmp; 243 244 lineno++; 245 246 memset(&ent, 0, sizeof(ent)); 247 248 q = nexttoken(&p); 249 if(strcmp(q, "kdb5_util") == 0) { 250 int major; 251 q = nexttoken(&p); /* load_dump */ 252 if(strcmp(q, "load_dump")) 253 errx(1, "line %d: unknown version", lineno); 254 q = nexttoken(&p); /* load_dump */ 255 if(strcmp(q, "version")) 256 errx(1, "line %d: unknown version", lineno); 257 q = nexttoken(&p); /* x.0 */ 258 if(sscanf(q, "%d", &major) != 1) 259 errx(1, "line %d: unknown version", lineno); 260 if(major != 4) 261 errx(1, "unknown dump file format, got %d, expected 4", major); 262 continue; 263 } else if(strcmp(q, "princ") != 0) { 264 warnx("line %d: not a principal", lineno); 265 continue; 266 } 267 tmp = getint(&p); 268 if(tmp != 38) { 269 warnx("line %d: bad base length %d != 38", lineno, tmp); 270 continue; 271 } 272 q = nexttoken(&p); /* length of principal */ 273 num_tl_data = getint(&p); /* number of tl-data */ 274 num_key_data = getint(&p); /* number of key-data */ 275 extra_data_length = getint(&p); /* length of extra data */ 276 q = nexttoken(&p); /* principal name */ 277 krb5_parse_name(pd->context, q, &ent.entry.principal); 278 attributes = getint(&p); /* attributes */ 279 attr_to_flags(attributes, &ent.entry.flags); 280 tmp = getint(&p); /* max life */ 281 if(tmp != 0) { 282 ALLOC(ent.entry.max_life); 283 *ent.entry.max_life = tmp; 284 } 285 tmp = getint(&p); /* max renewable life */ 286 if(tmp != 0) { 287 ALLOC(ent.entry.max_renew); 288 *ent.entry.max_renew = tmp; 289 } 290 tmp = getint(&p); /* expiration */ 291 if(tmp != 0 && tmp != 2145830400) { 292 ALLOC(ent.entry.valid_end); 293 *ent.entry.valid_end = tmp; 294 } 295 tmp = getint(&p); /* pw expiration */ 296 if(tmp != 0) { 297 ALLOC(ent.entry.pw_end); 298 *ent.entry.pw_end = tmp; 299 } 300 q = nexttoken(&p); /* last auth */ 301 q = nexttoken(&p); /* last failed auth */ 302 q = nexttoken(&p); /* fail auth count */ 303 for(i = 0; i < num_tl_data; i++) { 304 unsigned long val; 305 int tl_type, tl_length; 306 unsigned char *buf; 307 krb5_principal princ; 308 309 tl_type = getint(&p); /* data type */ 310 tl_length = getint(&p); /* data length */ 311 312 #define mit_KRB5_TL_LAST_PWD_CHANGE 1 313 #define mit_KRB5_TL_MOD_PRINC 2 314 switch(tl_type) { 315 case mit_KRB5_TL_MOD_PRINC: 316 buf = malloc(tl_length); 317 if (buf == NULL) 318 errx(ENOMEM, "malloc"); 319 getdata(&p, buf, tl_length); /* data itself */ 320 val = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24); 321 ret = krb5_parse_name(pd->context, (char *)buf + 4, &princ); 322 free(buf); 323 ALLOC(ent.entry.modified_by); 324 ent.entry.modified_by->time = val; 325 ent.entry.modified_by->principal = princ; 326 break; 327 default: 328 nexttoken(&p); 329 break; 330 } 331 } 332 ALLOC_SEQ(&ent.entry.keys, num_key_data); 333 for(i = 0; i < num_key_data; i++) { 334 int key_versions; 335 key_versions = getint(&p); /* key data version */ 336 ent.entry.kvno = getint(&p); /* XXX kvno */ 337 338 ALLOC(ent.entry.keys.val[i].mkvno); 339 *ent.entry.keys.val[i].mkvno = 0; 340 341 /* key version 0 -- actual key */ 342 ent.entry.keys.val[i].key.keytype = getint(&p); /* key type */ 343 tmp = getint(&p); /* key length */ 344 /* the first two bytes of the key is the key length -- 345 skip it */ 346 krb5_data_alloc(&ent.entry.keys.val[i].key.keyvalue, tmp - 2); 347 q = nexttoken(&p); /* key itself */ 348 hex_to_octet_string(q + 4, &ent.entry.keys.val[i].key.keyvalue); 349 350 if(key_versions > 1) { 351 /* key version 1 -- optional salt */ 352 ALLOC(ent.entry.keys.val[i].salt); 353 ent.entry.keys.val[i].salt->type = getint(&p); /* salt type */ 354 tmp = getint(&p); /* salt length */ 355 if(tmp > 0) { 356 krb5_data_alloc(&ent.entry.keys.val[i].salt->salt, tmp - 2); 357 q = nexttoken(&p); /* salt itself */ 358 hex_to_octet_string(q + 4, 359 &ent.entry.keys.val[i].salt->salt); 360 } else { 361 ent.entry.keys.val[i].salt->salt.length = 0; 362 ent.entry.keys.val[i].salt->salt.data = NULL; 363 tmp = getint(&p); /* -1, if no data. */ 364 } 365 fix_salt(pd->context, &ent.entry, i); 366 } 367 } 368 q = nexttoken(&p); /* extra data */ 369 v5_prop(pd->context, NULL, &ent, arg); 370 } 371 fclose(f); 372 return 0; 373 } 374