kuser/kdigest.c

   1 /*
   2  * Copyright (c) 2006 - 2007 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 #define HC_DEPRECATED_CRYPTO
  35
  36 #include "kuser_locl.h"
  37
  38 #include <kdigest-commands.h>
  39 #include <hex.h>
  40 #include <base64.h>
  41 #include <heimntlm.h>
  42 #include "crypto-headers.h"
  43
  44 static int version_flag = 0;
  45 static int help_flag    = 0;
  46 static char *ccache_string;
  47 static krb5_ccache id;
  48
  49 static struct getargs args[] = {
  50     {"ccache",  0,      arg_string,     &ccache_string, "credential cache", NULL },
  51     {"version", 0,      arg_flag,       &version_flag, "print version", NULL },
  52     {"help",    0,      arg_flag,       &help_flag,  NULL, NULL }
  53 };
  54
  55 static void
  56 usage (int ret)
  57 {
  58     arg_printusage (args, sizeof(args)/sizeof(*args),
  59                     NULL, "");
  60     exit (ret);
  61 }
  62
  63 static krb5_context context;
  64
  65 int
  66 digest_probe(struct digest_probe_options *opt,
  67              int argc, char ** argv)
  68 {
  69     krb5_error_code ret;
  70     krb5_realm realm;
  71     unsigned flags;
  72
  73     realm = opt->realm_string;
  74
  75     if (realm == NULL)
  76         errx(1, "realm missing");
  77
  78     ret = krb5_digest_probe(context, realm, id, &flags);
  79     if (ret)
  80         krb5_err(context, 1, ret, "digest_probe");
  81
  82     printf("flags: %u\n", flags);
  83
  84     return 0;
  85 }
  86
  87 int
  88 digest_server_init(struct digest_server_init_options *opt,
  89                    int argc, char ** argv)
  90 {
  91     krb5_error_code ret;
  92     krb5_digest digest;
  93
  94     ret = krb5_digest_alloc(context, &digest);
  95     if (ret)
  96         krb5_err(context, 1, ret, "digest_alloc");
  97
  98     ret = krb5_digest_set_type(context, digest, opt->type_string);
  99     if (ret)
 100         krb5_err(context, 1, ret, "krb5_digest_set_type");
 101
 102     if (opt->cb_type_string && opt->cb_value_string) {
 103         ret = krb5_digest_set_server_cb(context, digest,
 104                                         opt->cb_type_string,
 105                                         opt->cb_value_string);
 106         if (ret)
 107             krb5_err(context, 1, ret, "krb5_digest_set_server_cb");
 108     }
 109     ret = krb5_digest_init_request(context,
 110                                    digest,
 111                                    opt->kerberos_realm_string,
 112                                    id);
 113     if (ret)
 114         krb5_err(context, 1, ret, "krb5_digest_init_request");
 115
 116     printf("type=%s\n", opt->type_string);
 117     printf("server-nonce=%s\n",
 118            krb5_digest_get_server_nonce(context, digest));
 119     {
 120         const char *s = krb5_digest_get_identifier(context, digest);
 121         if (s)
 122             printf("identifier=%s\n", s);
 123     }
 124     printf("opaque=%s\n", krb5_digest_get_opaque(context, digest));
 125
 126     krb5_digest_free(digest);
 127
 128     return 0;
 129 }
 130
 131 int
 132 digest_server_request(struct digest_server_request_options *opt,
 133                       int argc, char **argv)
 134 {
 135     krb5_error_code ret;
 136     krb5_digest digest;
 137     const char *status, *rsp;
 138     krb5_data session_key;
 139
 140     if (opt->server_nonce_string == NULL)
 141         errx(1, "server nonce missing");
 142     if (opt->type_string == NULL)
 143         errx(1, "type missing");
 144     if (opt->opaque_string == NULL)
 145         errx(1, "opaque missing");
 146     if (opt->client_response_string == NULL)
 147         errx(1, "client response missing");
 148
 149     ret = krb5_digest_alloc(context, &digest);
 150     if (ret)
 151         krb5_err(context, 1, ret, "digest_alloc");
 152
 153     if (strcasecmp(opt->type_string, "CHAP") == 0) {
 154         if (opt->server_identifier_string == NULL)
 155             errx(1, "server identifier missing");
 156
 157         ret = krb5_digest_set_identifier(context, digest,
 158                                          opt->server_identifier_string);
 159         if (ret)
 160             krb5_err(context, 1, ret, "krb5_digest_set_type");
 161     }
 162
 163     ret = krb5_digest_set_type(context, digest, opt->type_string);
 164     if (ret)
 165         krb5_err(context, 1, ret, "krb5_digest_set_type");
 166
 167     ret = krb5_digest_set_username(context, digest, opt->username_string);
 168     if (ret)
 169         krb5_err(context, 1, ret, "krb5_digest_set_username");
 170
 171     ret = krb5_digest_set_server_nonce(context, digest,
 172                                        opt->server_nonce_string);
 173     if (ret)
 174         krb5_err(context, 1, ret, "krb5_digest_set_server_nonce");
 175
 176     if(opt->client_nonce_string) {
 177         ret = krb5_digest_set_client_nonce(context, digest,
 178                                            opt->client_nonce_string);
 179         if (ret)
 180             krb5_err(context, 1, ret, "krb5_digest_set_client_nonce");
 181     }
 182
 183
 184     ret = krb5_digest_set_opaque(context, digest, opt->opaque_string);
 185     if (ret)
 186         krb5_err(context, 1, ret, "krb5_digest_set_opaque");
 187
 188     ret = krb5_digest_set_responseData(context, digest,
 189                                        opt->client_response_string);
 190     if (ret)
 191         krb5_err(context, 1, ret, "krb5_digest_set_responseData");
 192
 193     ret = krb5_digest_request(context, digest,
 194                               opt->kerberos_realm_string, id);
 195     if (ret)
 196         krb5_err(context, 1, ret, "krb5_digest_request");
 197
 198     status = krb5_digest_rep_get_status(context, digest) ? "ok" : "failed";
 199     rsp = krb5_digest_get_rsp(context, digest);
 200
 201     printf("status=%s\n", status);
 202     if (rsp)
 203         printf("rsp=%s\n", rsp);
 204     printf("tickets=no\n");
 205
 206     ret = krb5_digest_get_session_key(context, digest, &session_key);
 207     if (ret)
 208         krb5_err(context, 1, ret, "krb5_digest_get_session_key");
 209
 210     if (session_key.length) {
 211         char *key;
 212         hex_encode(session_key.data, session_key.length, &key);
 213         if (key == NULL)
 214             krb5_errx(context, 1, "hex_encode");
 215         krb5_data_free(&session_key);
 216         printf("session-key=%s\n", key);
 217         free(key);
 218     }
 219
 220     krb5_digest_free(digest);
 221
 222     return 0;
 223 }
 224
 225 static void
 226 client_chap(const void *server_nonce, size_t snoncelen,
 227             unsigned char server_identifier,
 228             const char *password)
 229 {
 230     EVP_MD_CTX *ctx;
 231     unsigned char md[MD5_DIGEST_LENGTH];
 232     char *h;
 233
 234     ctx = EVP_MD_CTX_create();
 235     EVP_DigestInit_ex(ctx, EVP_md5(), NULL);
 236
 237     EVP_DigestUpdate(ctx, &server_identifier, 1);
 238     EVP_DigestUpdate(ctx, password, strlen(password));
 239     EVP_DigestUpdate(ctx, server_nonce, snoncelen);
 240     EVP_DigestFinal_ex(ctx, md, NULL);
 241
 242     EVP_MD_CTX_destroy(ctx);
 243
 244     hex_encode(md, 16, &h);
 245
 246     printf("responseData=%s\n", h);
 247     free(h);
 248 }
 249
 250 static const unsigned char ms_chap_v2_magic1[39] = {
 251     0x4D, 0x61, 0x67, 0x69, 0x63, 0x20, 0x73, 0x65, 0x72, 0x76,
 252     0x65, 0x72, 0x20, 0x74, 0x6F, 0x20, 0x63, 0x6C, 0x69, 0x65,
 253     0x6E, 0x74, 0x20, 0x73, 0x69, 0x67, 0x6E, 0x69, 0x6E, 0x67,
 254     0x20, 0x63, 0x6F, 0x6E, 0x73, 0x74, 0x61, 0x6E, 0x74
 255 };
 256 static const unsigned char ms_chap_v2_magic2[41] = {
 257     0x50, 0x61, 0x64, 0x20, 0x74, 0x6F, 0x20, 0x6D, 0x61, 0x6B,
 258     0x65, 0x20, 0x69, 0x74, 0x20, 0x64, 0x6F, 0x20, 0x6D, 0x6F,
 259     0x72, 0x65, 0x20, 0x74, 0x68, 0x61, 0x6E, 0x20, 0x6F, 0x6E,
 260     0x65, 0x20, 0x69, 0x74, 0x65, 0x72, 0x61, 0x74, 0x69, 0x6F,
 261     0x6E
 262 };
 263 static const unsigned char ms_rfc3079_magic1[27] = {
 264     0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74,
 265     0x68, 0x65, 0x20, 0x4d, 0x50, 0x50, 0x45, 0x20, 0x4d,
 266     0x61, 0x73, 0x74, 0x65, 0x72, 0x20, 0x4b, 0x65, 0x79
 267 };
 268
 269 static void
 270 client_mschapv2(const void *server_nonce, size_t snoncelen,
 271                 const void *client_nonce, size_t cnoncelen,
 272                 const char *username,
 273                 const char *password)
 274 {
 275     EVP_MD_CTX *hctx, *ctx;
 276     unsigned char md[SHA_DIGEST_LENGTH], challenge[SHA_DIGEST_LENGTH];
 277     unsigned char hmd[MD4_DIGEST_LENGTH];
 278     struct ntlm_buf answer;
 279     int i, len, ret;
 280     char *h;
 281
 282     ctx = EVP_MD_CTX_create();
 283     EVP_DigestInit_ex(ctx, EVP_sha1(), NULL);
 284
 285     EVP_DigestUpdate(ctx, client_nonce, cnoncelen);
 286     EVP_DigestUpdate(ctx, server_nonce, snoncelen);
 287     EVP_DigestUpdate(ctx, username, strlen(username));
 288     EVP_DigestFinal_ex(ctx, md, NULL);
 289
 290
 291     hctx = EVP_MD_CTX_create();
 292     EVP_DigestInit_ex(hctx, EVP_md4(), NULL);
 293     len = strlen(password);
 294     for (i = 0; i < len; i++) {
 295         EVP_DigestUpdate(hctx, &password[i], 1);
 296         EVP_DigestUpdate(hctx, &password[len], 1);
 297     }
 298     EVP_DigestFinal_ex(hctx, hmd, NULL);
 299
 300
 301     /* ChallengeResponse */
 302     ret = heim_ntlm_calculate_ntlm1(hmd, sizeof(hmd), md, &answer);
 303     if (ret)
 304         errx(1, "heim_ntlm_calculate_ntlm1");
 305
 306     hex_encode(answer.data, answer.length, &h);
 307     printf("responseData=%s\n", h);
 308     free(h);
 309
 310     /* PasswordHash */
 311     EVP_DigestInit_ex(hctx, EVP_md4(), NULL);
 312     EVP_DigestUpdate(hctx, hmd, sizeof(hmd));
 313     EVP_DigestFinal_ex(hctx, hmd, NULL);
 314
 315
 316     /* GenerateAuthenticatorResponse */
 317     EVP_DigestInit_ex(ctx, EVP_sha1(), NULL);
 318     EVP_DigestUpdate(ctx, hmd, sizeof(hmd));
 319     EVP_DigestUpdate(ctx, answer.data, answer.length);
 320     EVP_DigestUpdate(ctx, ms_chap_v2_magic1, sizeof(ms_chap_v2_magic1));
 321     EVP_DigestFinal_ex(ctx, md, NULL);
 322
 323     /* ChallengeHash */
 324     EVP_DigestInit_ex(ctx, EVP_sha1(), NULL);
 325     EVP_DigestUpdate(ctx, client_nonce, cnoncelen);
 326     EVP_DigestUpdate(ctx, server_nonce, snoncelen);
 327     EVP_DigestUpdate(ctx, username, strlen(username));
 328     EVP_DigestFinal_ex(ctx, challenge, NULL);
 329
 330     EVP_DigestInit_ex(ctx, EVP_sha1(), NULL);
 331     EVP_DigestUpdate(ctx, md, sizeof(md));
 332     EVP_DigestUpdate(ctx, challenge, 8);
 333     EVP_DigestUpdate(ctx, ms_chap_v2_magic2, sizeof(ms_chap_v2_magic2));
 334     EVP_DigestFinal_ex(ctx, md, NULL);
 335
 336     hex_encode(md, sizeof(md), &h);
 337     printf("AuthenticatorResponse=%s\n", h);
 338     free(h);
 339
 340     /* get_master, rfc 3079 3.4 */
 341     EVP_DigestInit_ex(ctx, EVP_sha1(), NULL);
 342     EVP_DigestUpdate(ctx, hmd, sizeof(hmd));
 343     EVP_DigestUpdate(ctx, answer.data, answer.length);
 344     EVP_DigestUpdate(ctx, ms_rfc3079_magic1, sizeof(ms_rfc3079_magic1));
 345     EVP_DigestFinal_ex(ctx, md, NULL);
 346
 347     free(answer.data);
 348
 349     hex_encode(md, 16, &h);
 350     printf("session-key=%s\n", h);
 351     free(h);
 352
 353     EVP_MD_CTX_destroy(hctx);
 354     EVP_MD_CTX_destroy(ctx);
 355 }
 356
 357
 358 int
 359 digest_client_request(struct digest_client_request_options *opt,
 360                       int argc, char **argv)
 361 {
 362     char *server_nonce, *client_nonce = NULL, server_identifier;
 363     ssize_t snoncelen, cnoncelen = 0;
 364
 365     if (opt->server_nonce_string == NULL)
 366         errx(1, "server nonce missing");
 367     if (opt->password_string == NULL)
 368         errx(1, "password missing");
 369
 370     if (opt->opaque_string == NULL)
 371         errx(1, "opaque missing");
 372
 373     snoncelen = strlen(opt->server_nonce_string);
 374     server_nonce = malloc(snoncelen);
 375     if (server_nonce == NULL)
 376         errx(1, "server_nonce");
 377
 378     snoncelen = hex_decode(opt->server_nonce_string, server_nonce, snoncelen);
 379     if (snoncelen <= 0)
 380         errx(1, "server nonce wrong");
 381
 382     if (opt->client_nonce_string) {
 383         cnoncelen = strlen(opt->client_nonce_string);
 384         client_nonce = malloc(cnoncelen);
 385         if (client_nonce == NULL)
 386             errx(1, "client_nonce");
 387
 388         cnoncelen = hex_decode(opt->client_nonce_string,
 389                                client_nonce, cnoncelen);
 390         if (cnoncelen <= 0)
 391             errx(1, "client nonce wrong");
 392     }
 393
 394     if (opt->server_identifier_string) {
 395         int ret;
 396
 397         ret = hex_decode(opt->server_identifier_string, &server_identifier, 1);
 398         if (ret != 1)
 399             errx(1, "server identifier wrong length");
 400     }
 401
 402     if (strcasecmp(opt->type_string, "CHAP") == 0) {
 403         if (opt->server_identifier_string == NULL)
 404             errx(1, "server identifier missing");
 405
 406         client_chap(server_nonce, snoncelen, server_identifier,
 407                     opt->password_string);
 408
 409     } else if (strcasecmp(opt->type_string, "MS-CHAP-V2") == 0) {
 410         if (opt->client_nonce_string == NULL)
 411             errx(1, "client nonce missing");
 412         if (opt->username_string == NULL)
 413             errx(1, "client nonce missing");
 414
 415         client_mschapv2(server_nonce, snoncelen,
 416                         client_nonce, cnoncelen,
 417                         opt->username_string,
 418                         opt->password_string);
 419     }
 420     if (client_nonce)
 421         free(client_nonce);
 422     free(server_nonce);
 423
 424     return 0;
 425 }
 426
 427 #include <heimntlm.h>
 428
 429 int
 430 ntlm_server_init(struct ntlm_server_init_options *opt,
 431                  int argc, char ** argv)
 432 {
 433     krb5_error_code ret;
 434     krb5_ntlm ntlm;
 435     struct ntlm_type2 type2;
 436     krb5_data challenge, opaque;
 437     struct ntlm_buf data;
 438     char *s;
 439     static char zero2[] = "\x00\x00";
 440
 441     memset(&type2, 0, sizeof(type2));
 442
 443     ret = krb5_ntlm_alloc(context, &ntlm);
 444     if (ret)
 445         krb5_err(context, 1, ret, "krb5_ntlm_alloc");
 446
 447     ret = krb5_ntlm_init_request(context,
 448                                  ntlm,
 449                                  opt->kerberos_realm_string,
 450                                  id,
 451                                  NTLM_NEG_UNICODE|NTLM_NEG_NTLM,
 452                                  "NUTCRACKER",
 453                                  "L");
 454     if (ret)
 455         krb5_err(context, 1, ret, "krb5_ntlm_init_request");
 456
 457     /*
 458      *
 459      */
 460
 461     ret = krb5_ntlm_init_get_challenge(context, ntlm, &challenge);
 462     if (ret)
 463         krb5_err(context, 1, ret, "krb5_ntlm_init_get_challenge");
 464
 465     if (challenge.length != sizeof(type2.challenge))
 466         krb5_errx(context, 1, "ntlm challenge have wrong length");
 467     memcpy(type2.challenge, challenge.data, sizeof(type2.challenge));
 468     krb5_data_free(&challenge);
 469
 470     ret = krb5_ntlm_init_get_flags(context, ntlm, &type2.flags);
 471     if (ret)
 472         krb5_err(context, 1, ret, "krb5_ntlm_init_get_flags");
 473
 474     krb5_ntlm_init_get_targetname(context, ntlm, &type2.targetname);
 475     type2.targetinfo.data = zero2;
 476     type2.targetinfo.length = 2;
 477
 478     ret = heim_ntlm_encode_type2(&type2, &data);
 479     if (ret)
 480         krb5_errx(context, 1, "heim_ntlm_encode_type2");
 481
 482     free(type2.targetname);
 483
 484     /*
 485      *
 486      */
 487
 488     base64_encode(data.data, data.length, &s);
 489     free(data.data);
 490     printf("type2=%s\n", s);
 491     free(s);
 492
 493     /*
 494      *
 495      */
 496
 497     ret = krb5_ntlm_init_get_opaque(context, ntlm, &opaque);
 498     if (ret)
 499         krb5_err(context, 1, ret, "krb5_ntlm_init_get_opaque");
 500
 501     base64_encode(opaque.data, opaque.length, &s);
 502     krb5_data_free(&opaque);
 503     printf("opaque=%s\n", s);
 504     free(s);
 505
 506     /*
 507      *
 508      */
 509
 510     krb5_ntlm_free(context, ntlm);
 511
 512     return 0;
 513 }
 514
 515
 516 /*
 517  *
 518  */
 519
 520 int
 521 help(void *opt, int argc, char **argv)
 522 {
 523     sl_slc_help(commands, argc, argv);
 524     return 0;
 525 }
 526
 527 int
 528 main(int argc, char **argv)
 529 {
 530     krb5_error_code ret;
 531     int optidx = 0;
 532
 533     setprogname(argv[0]);
 534
 535     ret = krb5_init_context (&context);
 536     if (ret == KRB5_CONFIG_BADFORMAT)
 537         errx (1, "krb5_init_context failed to parse configuration file");
 538     else if (ret)
 539         errx(1, "krb5_init_context failed: %d", ret);
 540
 541     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
 542         usage(1);
 543
 544     if (help_flag)
 545         usage (0);
 546
 547     if(version_flag){
 548         print_version(NULL);
 549         exit(0);
 550     }
 551
 552     argc -= optidx;
 553     argv += optidx;
 554
 555     if (argc == 0) {
 556         help(NULL, argc, argv);
 557         return 1;
 558     }
 559
 560     if (ccache_string) {
 561         ret = krb5_cc_resolve(context, ccache_string, &id);
 562         if (ret)
 563             krb5_err(context, 1, ret, "krb5_cc_resolve");
 564     }
 565
 566     ret = sl_command (commands, argc, argv);
 567     if (ret == -1) {
 568         help(NULL, argc, argv);
 569         return 1;
 570     }
 571     return ret;
 572 }