lib/krb5/auth_context.c

   1 /*
   2  * Copyright (c) 1997 - 2002 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 "krb5_locl.h"
  35
  36 krb5_error_code KRB5_LIB_FUNCTION
  37 krb5_auth_con_init(krb5_context context,
  38                    krb5_auth_context *auth_context)
  39 {
  40     krb5_auth_context p;
  41
  42     ALLOC(p, 1);
  43     if(!p) {
  44         krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
  45         return ENOMEM;
  46     }
  47     memset(p, 0, sizeof(*p));
  48     ALLOC(p->authenticator, 1);
  49     if (!p->authenticator) {
  50         krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
  51         free(p);
  52         return ENOMEM;
  53     }
  54     memset (p->authenticator, 0, sizeof(*p->authenticator));
  55     p->flags = KRB5_AUTH_CONTEXT_DO_TIME;
  56
  57     p->local_address  = NULL;
  58     p->remote_address = NULL;
  59     p->local_port     = 0;
  60     p->remote_port    = 0;
  61     p->keytype        = KEYTYPE_NULL;
  62     p->cksumtype      = CKSUMTYPE_NONE;
  63     *auth_context     = p;
  64     return 0;
  65 }
  66
  67 krb5_error_code KRB5_LIB_FUNCTION
  68 krb5_auth_con_free(krb5_context context,
  69                    krb5_auth_context auth_context)
  70 {
  71     if (auth_context != NULL) {
  72         krb5_free_authenticator(context, &auth_context->authenticator);
  73         if(auth_context->local_address){
  74             free_HostAddress(auth_context->local_address);
  75             free(auth_context->local_address);
  76         }
  77         if(auth_context->remote_address){
  78             free_HostAddress(auth_context->remote_address);
  79             free(auth_context->remote_address);
  80         }
  81         krb5_free_keyblock(context, auth_context->keyblock);
  82         krb5_free_keyblock(context, auth_context->remote_subkey);
  83         krb5_free_keyblock(context, auth_context->local_subkey);
  84         free (auth_context);
  85     }
  86     return 0;
  87 }
  88
  89 krb5_error_code KRB5_LIB_FUNCTION
  90 krb5_auth_con_setflags(krb5_context context,
  91                        krb5_auth_context auth_context,
  92                        int32_t flags)
  93 {
  94     auth_context->flags = flags;
  95     return 0;
  96 }
  97
  98
  99 krb5_error_code KRB5_LIB_FUNCTION
 100 krb5_auth_con_getflags(krb5_context context,
 101                        krb5_auth_context auth_context,
 102                        int32_t *flags)
 103 {
 104     *flags = auth_context->flags;
 105     return 0;
 106 }
 107
 108 krb5_error_code KRB5_LIB_FUNCTION
 109 krb5_auth_con_addflags(krb5_context context,
 110                        krb5_auth_context auth_context,
 111                        int32_t addflags,
 112                        int32_t *flags)
 113 {
 114     if (flags)
 115         *flags = auth_context->flags;
 116     auth_context->flags |= addflags;
 117     return 0;
 118 }
 119
 120 krb5_error_code KRB5_LIB_FUNCTION
 121 krb5_auth_con_removeflags(krb5_context context,
 122                           krb5_auth_context auth_context,
 123                           int32_t removeflags,
 124                           int32_t *flags)
 125 {
 126     if (flags)
 127         *flags = auth_context->flags;
 128     auth_context->flags &= ~removeflags;
 129     return 0;
 130 }
 131
 132 krb5_error_code KRB5_LIB_FUNCTION
 133 krb5_auth_con_setaddrs(krb5_context context,
 134                        krb5_auth_context auth_context,
 135                        krb5_address *local_addr,
 136                        krb5_address *remote_addr)
 137 {
 138     if (local_addr) {
 139         if (auth_context->local_address)
 140             krb5_free_address (context, auth_context->local_address);
 141         else
 142             if ((auth_context->local_address = malloc(sizeof(krb5_address))) == NULL)
 143                 return ENOMEM;
 144         krb5_copy_address(context, local_addr, auth_context->local_address);
 145     }
 146     if (remote_addr) {
 147         if (auth_context->remote_address)
 148             krb5_free_address (context, auth_context->remote_address);
 149         else
 150             if ((auth_context->remote_address = malloc(sizeof(krb5_address))) == NULL)
 151                 return ENOMEM;
 152         krb5_copy_address(context, remote_addr, auth_context->remote_address);
 153     }
 154     return 0;
 155 }
 156
 157 krb5_error_code KRB5_LIB_FUNCTION
 158 krb5_auth_con_genaddrs(krb5_context context,
 159                        krb5_auth_context auth_context,
 160                        int fd, int flags)
 161 {
 162     krb5_error_code ret;
 163     krb5_address local_k_address, remote_k_address;
 164     krb5_address *lptr = NULL, *rptr = NULL;
 165     struct sockaddr_storage ss_local, ss_remote;
 166     struct sockaddr *local  = (struct sockaddr *)&ss_local;
 167     struct sockaddr *remote = (struct sockaddr *)&ss_remote;
 168     socklen_t len;
 169
 170     if(flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_ADDR) {
 171         if (auth_context->local_address == NULL) {
 172             len = sizeof(ss_local);
 173             if(getsockname(fd, local, &len) < 0) {
 174                 char buf[128];
 175                 ret = errno;
 176                 strerror_r(ret, buf, sizeof(buf));
 177                 krb5_set_error_message(context, ret, "getsockname: %s", buf);
 178                 goto out;
 179             }
 180             ret = krb5_sockaddr2address (context, local, &local_k_address);
 181             if(ret) goto out;
 182             if(flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR) {
 183                 krb5_sockaddr2port (context, local, &auth_context->local_port);
 184             } else
 185                 auth_context->local_port = 0;
 186             lptr = &local_k_address;
 187         }
 188     }
 189     if(flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_ADDR) {
 190         len = sizeof(ss_remote);
 191         if(getpeername(fd, remote, &len) < 0) {
 192             char buf[128];
 193             ret = errno;
 194             strerror_r(ret, buf, sizeof(buf));
 195             krb5_set_error_message(context, ret, "getpeername: %s", buf);
 196             goto out;
 197         }
 198         ret = krb5_sockaddr2address (context, remote, &remote_k_address);
 199         if(ret) goto out;
 200         if(flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR) {
 201             krb5_sockaddr2port (context, remote, &auth_context->remote_port);
 202         } else
 203             auth_context->remote_port = 0;
 204         rptr = &remote_k_address;
 205     }
 206     ret = krb5_auth_con_setaddrs (context,
 207                                   auth_context,
 208                                   lptr,
 209                                   rptr);
 210   out:
 211     if (lptr)
 212         krb5_free_address (context, lptr);
 213     if (rptr)
 214         krb5_free_address (context, rptr);
 215     return ret;
 216
 217 }
 218
 219 krb5_error_code KRB5_LIB_FUNCTION
 220 krb5_auth_con_setaddrs_from_fd (krb5_context context,
 221                                 krb5_auth_context auth_context,
 222                                 void *p_fd)
 223 {
 224     int fd = *(int*)p_fd;
 225     int flags = 0;
 226     if(auth_context->local_address == NULL)
 227         flags |= KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR;
 228     if(auth_context->remote_address == NULL)
 229         flags |= KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR;
 230     return krb5_auth_con_genaddrs(context, auth_context, fd, flags);
 231 }
 232
 233 krb5_error_code KRB5_LIB_FUNCTION
 234 krb5_auth_con_getaddrs(krb5_context context,
 235                        krb5_auth_context auth_context,
 236                        krb5_address **local_addr,
 237                        krb5_address **remote_addr)
 238 {
 239     if(*local_addr)
 240         krb5_free_address (context, *local_addr);
 241     *local_addr = malloc (sizeof(**local_addr));
 242     if (*local_addr == NULL) {
 243         krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
 244         return ENOMEM;
 245     }
 246     krb5_copy_address(context,
 247                       auth_context->local_address,
 248                       *local_addr);
 249
 250     if(*remote_addr)
 251         krb5_free_address (context, *remote_addr);
 252     *remote_addr = malloc (sizeof(**remote_addr));
 253     if (*remote_addr == NULL) {
 254         krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
 255         krb5_free_address (context, *local_addr);
 256         *local_addr = NULL;
 257         return ENOMEM;
 258     }
 259     krb5_copy_address(context,
 260                       auth_context->remote_address,
 261                       *remote_addr);
 262     return 0;
 263 }
 264
 265 static krb5_error_code
 266 copy_key(krb5_context context,
 267          krb5_keyblock *in,
 268          krb5_keyblock **out)
 269 {
 270     if(in)
 271         return krb5_copy_keyblock(context, in, out);
 272     *out = NULL; /* is this right? */
 273     return 0;
 274 }
 275
 276 krb5_error_code KRB5_LIB_FUNCTION
 277 krb5_auth_con_getkey(krb5_context context,
 278                      krb5_auth_context auth_context,
 279                      krb5_keyblock **keyblock)
 280 {
 281     return copy_key(context, auth_context->keyblock, keyblock);
 282 }
 283
 284 krb5_error_code KRB5_LIB_FUNCTION
 285 krb5_auth_con_getlocalsubkey(krb5_context context,
 286                              krb5_auth_context auth_context,
 287                              krb5_keyblock **keyblock)
 288 {
 289     return copy_key(context, auth_context->local_subkey, keyblock);
 290 }
 291
 292 krb5_error_code KRB5_LIB_FUNCTION
 293 krb5_auth_con_getremotesubkey(krb5_context context,
 294                               krb5_auth_context auth_context,
 295                               krb5_keyblock **keyblock)
 296 {
 297     return copy_key(context, auth_context->remote_subkey, keyblock);
 298 }
 299
 300 krb5_error_code KRB5_LIB_FUNCTION
 301 krb5_auth_con_setkey(krb5_context context,
 302                      krb5_auth_context auth_context,
 303                      krb5_keyblock *keyblock)
 304 {
 305     if(auth_context->keyblock)
 306         krb5_free_keyblock(context, auth_context->keyblock);
 307     return copy_key(context, keyblock, &auth_context->keyblock);
 308 }
 309
 310 krb5_error_code KRB5_LIB_FUNCTION
 311 krb5_auth_con_setlocalsubkey(krb5_context context,
 312                              krb5_auth_context auth_context,
 313                              krb5_keyblock *keyblock)
 314 {
 315     if(auth_context->local_subkey)
 316         krb5_free_keyblock(context, auth_context->local_subkey);
 317     return copy_key(context, keyblock, &auth_context->local_subkey);
 318 }
 319
 320 krb5_error_code KRB5_LIB_FUNCTION
 321 krb5_auth_con_generatelocalsubkey(krb5_context context,
 322                                   krb5_auth_context auth_context,
 323                                   krb5_keyblock *key)
 324 {
 325     krb5_error_code ret;
 326     krb5_keyblock *subkey;
 327
 328     ret = krb5_generate_subkey_extended (context, key,
 329                                          auth_context->keytype,
 330                                          &subkey);
 331     if(ret)
 332         return ret;
 333     if(auth_context->local_subkey)
 334         krb5_free_keyblock(context, auth_context->local_subkey);
 335     auth_context->local_subkey = subkey;
 336     return 0;
 337 }
 338
 339
 340 krb5_error_code KRB5_LIB_FUNCTION
 341 krb5_auth_con_setremotesubkey(krb5_context context,
 342                               krb5_auth_context auth_context,
 343                               krb5_keyblock *keyblock)
 344 {
 345     if(auth_context->remote_subkey)
 346         krb5_free_keyblock(context, auth_context->remote_subkey);
 347     return copy_key(context, keyblock, &auth_context->remote_subkey);
 348 }
 349
 350 krb5_error_code KRB5_LIB_FUNCTION
 351 krb5_auth_con_setcksumtype(krb5_context context,
 352                            krb5_auth_context auth_context,
 353                            krb5_cksumtype cksumtype)
 354 {
 355     auth_context->cksumtype = cksumtype;
 356     return 0;
 357 }
 358
 359 krb5_error_code KRB5_LIB_FUNCTION
 360 krb5_auth_con_getcksumtype(krb5_context context,
 361                            krb5_auth_context auth_context,
 362                            krb5_cksumtype *cksumtype)
 363 {
 364     *cksumtype = auth_context->cksumtype;
 365     return 0;
 366 }
 367
 368 krb5_error_code KRB5_LIB_FUNCTION
 369 krb5_auth_con_setkeytype (krb5_context context,
 370                           krb5_auth_context auth_context,
 371                           krb5_keytype keytype)
 372 {
 373     auth_context->keytype = keytype;
 374     return 0;
 375 }
 376
 377 krb5_error_code KRB5_LIB_FUNCTION
 378 krb5_auth_con_getkeytype (krb5_context context,
 379                           krb5_auth_context auth_context,
 380                           krb5_keytype *keytype)
 381 {
 382     *keytype = auth_context->keytype;
 383     return 0;
 384 }
 385
 386 #if 0
 387 krb5_error_code KRB5_LIB_FUNCTION
 388 krb5_auth_con_setenctype(krb5_context context,
 389                          krb5_auth_context auth_context,
 390                          krb5_enctype etype)
 391 {
 392     if(auth_context->keyblock)
 393         krb5_free_keyblock(context, auth_context->keyblock);
 394     ALLOC(auth_context->keyblock, 1);
 395     if(auth_context->keyblock == NULL)
 396         return ENOMEM;
 397     auth_context->keyblock->keytype = etype;
 398     return 0;
 399 }
 400
 401 krb5_error_code KRB5_LIB_FUNCTION
 402 krb5_auth_con_getenctype(krb5_context context,
 403                          krb5_auth_context auth_context,
 404                          krb5_enctype *etype)
 405 {
 406     krb5_abortx(context, "unimplemented krb5_auth_getenctype called");
 407 }
 408 #endif
 409
 410 krb5_error_code KRB5_LIB_FUNCTION
 411 krb5_auth_con_getlocalseqnumber(krb5_context context,
 412                             krb5_auth_context auth_context,
 413                             int32_t *seqnumber)
 414 {
 415   *seqnumber = auth_context->local_seqnumber;
 416   return 0;
 417 }
 418
 419 krb5_error_code KRB5_LIB_FUNCTION
 420 krb5_auth_con_setlocalseqnumber (krb5_context context,
 421                              krb5_auth_context auth_context,
 422                              int32_t seqnumber)
 423 {
 424   auth_context->local_seqnumber = seqnumber;
 425   return 0;
 426 }
 427
 428 krb5_error_code KRB5_LIB_FUNCTION
 429 krb5_auth_getremoteseqnumber(krb5_context context,
 430                              krb5_auth_context auth_context,
 431                              int32_t *seqnumber)
 432 {
 433   *seqnumber = auth_context->remote_seqnumber;
 434   return 0;
 435 }
 436
 437 krb5_error_code KRB5_LIB_FUNCTION
 438 krb5_auth_con_setremoteseqnumber (krb5_context context,
 439                               krb5_auth_context auth_context,
 440                               int32_t seqnumber)
 441 {
 442   auth_context->remote_seqnumber = seqnumber;
 443   return 0;
 444 }
 445
 446
 447 krb5_error_code KRB5_LIB_FUNCTION
 448 krb5_auth_con_getauthenticator(krb5_context context,
 449                            krb5_auth_context auth_context,
 450                            krb5_authenticator *authenticator)
 451 {
 452     *authenticator = malloc(sizeof(**authenticator));
 453     if (*authenticator == NULL) {
 454         krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
 455         return ENOMEM;
 456     }
 457
 458     copy_Authenticator(auth_context->authenticator,
 459                        *authenticator);
 460     return 0;
 461 }
 462
 463
 464 void KRB5_LIB_FUNCTION
 465 krb5_free_authenticator(krb5_context context,
 466                         krb5_authenticator *authenticator)
 467 {
 468     free_Authenticator (*authenticator);
 469     free (*authenticator);
 470     *authenticator = NULL;
 471 }
 472
 473
 474 krb5_error_code KRB5_LIB_FUNCTION
 475 krb5_auth_con_setuserkey(krb5_context context,
 476                          krb5_auth_context auth_context,
 477                          krb5_keyblock *keyblock)
 478 {
 479     if(auth_context->keyblock)
 480         krb5_free_keyblock(context, auth_context->keyblock);
 481     return krb5_copy_keyblock(context, keyblock, &auth_context->keyblock);
 482 }
 483
 484 krb5_error_code KRB5_LIB_FUNCTION
 485 krb5_auth_con_getrcache(krb5_context context,
 486                         krb5_auth_context auth_context,
 487                         krb5_rcache *rcache)
 488 {
 489     *rcache = auth_context->rcache;
 490     return 0;
 491 }
 492
 493 krb5_error_code KRB5_LIB_FUNCTION
 494 krb5_auth_con_setrcache(krb5_context context,
 495                         krb5_auth_context auth_context,
 496                         krb5_rcache rcache)
 497 {
 498     auth_context->rcache = rcache;
 499     return 0;
 500 }
 501
 502 #if 0 /* not implemented */
 503
 504 krb5_error_code KRB5_LIB_FUNCTION
 505 krb5_auth_con_initivector(krb5_context context,
 506                           krb5_auth_context auth_context)
 507 {
 508     krb5_abortx(context, "unimplemented krb5_auth_con_initivector called");
 509 }
 510
 511
 512 krb5_error_code KRB5_LIB_FUNCTION
 513 krb5_auth_con_setivector(krb5_context context,
 514                          krb5_auth_context auth_context,
 515                          krb5_pointer ivector)
 516 {
 517     krb5_abortx(context, "unimplemented krb5_auth_con_setivector called");
 518 }
 519
 520 #endif /* not implemented */