contrib/wpa_supplicant/pcsc_funcs.c

   1 /*
   2  * WPA Supplicant / PC/SC smartcard interface for USIM, GSM SIM
   3  * Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <winscard.h>
  19
  20 #include "common.h"
  21 #include "wpa_supplicant.h"
  22 #include "pcsc_funcs.h"
  23
  24
  25 /* See ETSI GSM 11.11 and ETSI TS 102 221 for details.
  26  * SIM commands:
  27  * Command APDU: CLA INS P1 P2 P3 Data
  28  *   CLA (class of instruction): A0 for GSM, 00 for USIM
  29  *   INS (instruction)
  30  *   P1 P2 P3 (parameters, P3 = length of Data)
  31  * Response APDU: Data SW1 SW2
  32  *   SW1 SW2 (Status words)
  33  * Commands (INS P1 P2 P3):
  34  *   SELECT: A4 00 00 02 <file_id, 2 bytes>
  35  *   GET RESPONSE: C0 00 00 <len>
  36  *   RUN GSM ALG: 88 00 00 00 <RAND len = 10>
  37  *   RUN UMTS ALG: 88 00 81 <len=0x22> data: 0x10 | RAND | 0x10 | AUTN
  38  *      P1 = ID of alg in card
  39  *      P2 = ID of secret key
  40  *   READ BINARY: B0 <offset high> <offset low> <len>
  41  *   VERIFY CHV: 20 00 <CHV number> 08
  42  *   CHANGE CHV: 24 00 <CHV number> 10
  43  *   DISABLE CHV: 26 00 01 08
  44  *   ENABLE CHV: 28 00 01 08
  45  *   UNBLOCK CHV: 2C 00 <00=CHV1, 02=CHV2> 10
  46  *   SLEEP: FA 00 00 00
  47  */
  48
  49 /* GSM SIM commands */
  50 #define SIM_CMD_SELECT                  0xa0, 0xa4, 0x00, 0x00, 0x02
  51 #define SIM_CMD_RUN_GSM_ALG             0xa0, 0x88, 0x00, 0x00, 0x10
  52 #define SIM_CMD_GET_RESPONSE            0xa0, 0xc0, 0x00, 0x00
  53 #define SIM_CMD_READ_BIN                0xa0, 0xb0, 0x00, 0x00
  54 #define SIM_CMD_VERIFY_CHV1             0xa0, 0x20, 0x00, 0x01, 0x08
  55
  56 /* USIM commands */
  57 #define USIM_CLA                        0x00
  58 #define USIM_CMD_RUN_UMTS_ALG           0x00, 0x88, 0x00, 0x81, 0x22
  59 #define USIM_CMD_GET_RESPONSE           0x00, 0xc0, 0x00, 0x00
  60
  61 #define USIM_FSP_TEMPL_TAG              0x62
  62
  63 #define USIM_TLV_FILE_DESC              0x82
  64 #define USIM_TLV_FILE_ID                0x83
  65 #define USIM_TLV_DF_NAME                0x84
  66 #define USIM_TLV_PROPR_INFO             0xA5
  67 #define USIM_TLV_LIFE_CYCLE_STATUS      0x8A
  68 #define USIM_TLV_FILE_SIZE              0x80
  69 #define USIM_TLV_TOTAL_FILE_SIZE        0x81
  70 #define USIM_TLV_PIN_STATUS_TEMPLATE    0xC6
  71 #define USIM_TLV_SHORT_FILE_ID          0x88
  72
  73 #define USIM_PS_DO_TAG                  0x90
  74
  75 #define AKA_RAND_LEN 16
  76 #define AKA_AUTN_LEN 16
  77 #define AKA_AUTS_LEN 14
  78 #define RES_MAX_LEN 16
  79 #define IK_LEN 16
  80 #define CK_LEN 16
  81
  82
  83 typedef enum { SCARD_GSM_SIM, SCARD_USIM } sim_types;
  84
  85 struct scard_data {
  86         long ctx;
  87         long card;
  88         unsigned long protocol;
  89         SCARD_IO_REQUEST recv_pci;
  90         sim_types sim_type;
  91 };
  92
  93
  94 static int _scard_select_file(struct scard_data *scard, unsigned short file_id,
  95                               unsigned char *buf, size_t *buf_len,
  96                               sim_types sim_type, unsigned char *aid);
  97 static int scard_select_file(struct scard_data *scard, unsigned short file_id,
  98                              unsigned char *buf, size_t *buf_len);
  99 static int scard_verify_pin(struct scard_data *scard, char *pin);
 100
 101
 102 static int scard_parse_fsp_templ(unsigned char *buf, size_t buf_len,
 103                                  int *ps_do, int *file_len)
 104 {
 105                 unsigned char *pos, *end;
 106
 107                 if (ps_do)
 108                         *ps_do = -1;
 109                 if (file_len)
 110                         *file_len = -1;
 111
 112                 pos = buf;
 113                 end = pos + buf_len;
 114                 if (*pos != USIM_FSP_TEMPL_TAG) {
 115                         wpa_printf(MSG_DEBUG, "SCARD: file header did not "
 116                                    "start with FSP template tag");
 117                         return -1;
 118                 }
 119                 pos++;
 120                 if (pos >= end)
 121                         return -1;
 122                 if ((pos + pos[0]) < end)
 123                         end = pos + 1 + pos[0];
 124                 pos++;
 125                 wpa_hexdump(MSG_DEBUG, "SCARD: file header FSP template",
 126                             pos, end - pos);
 127
 128                 while (pos + 1 < end) {
 129                         wpa_printf(MSG_MSGDUMP, "SCARD: file header TLV "
 130                                    "0x%02x len=%d", pos[0], pos[1]);
 131                         if (pos + 2 + pos[1] > end)
 132                                 break;
 133
 134                         if (pos[0] == USIM_TLV_FILE_SIZE &&
 135                             (pos[1] == 1 || pos[1] == 2) && file_len) {
 136                                 if (pos[1] == 1)
 137                                         *file_len = (int) pos[2];
 138                                 else
 139                                         *file_len = ((int) pos[2] << 8) |
 140                                                 (int) pos[3];
 141                                 wpa_printf(MSG_DEBUG, "SCARD: file_size=%d",
 142                                            *file_len);
 143                         }
 144
 145                         if (pos[0] == USIM_TLV_PIN_STATUS_TEMPLATE &&
 146                             pos[1] >= 2 && pos[2] == USIM_PS_DO_TAG &&
 147                             pos[3] >= 1 && ps_do) {
 148                                 wpa_printf(MSG_DEBUG, "SCARD: PS_DO=0x%02x",
 149                                            pos[4]);
 150                                 *ps_do = (int) pos[4];
 151                         }
 152
 153                         pos += 2 + pos[1];
 154
 155                         if (pos == end)
 156                                 return 0;
 157                 }
 158                 return -1;
 159 }
 160
 161
 162 static int scard_pin_needed(struct scard_data *scard,
 163                             unsigned char *hdr, size_t hlen)
 164 {
 165         if (scard->sim_type == SCARD_GSM_SIM) {
 166                 if (hlen > SCARD_CHV1_OFFSET &&
 167                     !(hdr[SCARD_CHV1_OFFSET] & SCARD_CHV1_FLAG))
 168                         return 1;
 169                 return 0;
 170         }
 171
 172         if (scard->sim_type == SCARD_USIM) {
 173                 int ps_do;
 174                 if (scard_parse_fsp_templ(hdr, hlen, &ps_do, NULL))
 175                         return -1;
 176                 /* TODO: there could be more than one PS_DO entry because of
 177                  * multiple PINs in key reference.. */
 178                 if (ps_do)
 179                         return 1;
 180         }
 181
 182         return -1;
 183 }
 184
 185
 186 struct scard_data * scard_init(scard_sim_type sim_type, char *pin)
 187 {
 188         long ret, len;
 189         struct scard_data *scard;
 190         char *readers = NULL;
 191         char buf[100];
 192         size_t blen;
 193
 194         wpa_printf(MSG_DEBUG, "SCARD: initializing smart card interface");
 195         scard = malloc(sizeof(*scard));
 196         if (scard == NULL)
 197                 return NULL;
 198         memset(scard, 0, sizeof(*scard));
 199
 200         ret = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL,
 201                                     &scard->ctx);
 202         if (ret != SCARD_S_SUCCESS) {
 203                 wpa_printf(MSG_DEBUG, "SCARD: Could not establish smart card "
 204                            "context (err=%ld)", ret);
 205                 goto failed;
 206         }
 207
 208         ret = SCardListReaders(scard->ctx, NULL, NULL, &len);
 209         if (ret != SCARD_S_SUCCESS) {
 210                 wpa_printf(MSG_DEBUG, "SCARD: SCardListReaders failed "
 211                            "(err=%ld)", ret);
 212                 goto failed;
 213         }
 214
 215         readers = malloc(len);
 216         if (readers == NULL) {
 217                 printf("malloc failed\n");
 218                 goto failed;
 219         }
 220
 221         ret = SCardListReaders(scard->ctx, NULL, readers, &len);
 222         if (ret != SCARD_S_SUCCESS) {
 223                 wpa_printf(MSG_DEBUG, "SCARD: SCardListReaders failed(2) "
 224                            "(err=%ld)", ret);
 225                 goto failed;
 226         }
 227         if (len < 3) {
 228                 wpa_printf(MSG_WARNING, "SCARD: No smart card readers "
 229                            "available.");
 230                 goto failed;
 231         }
 232         /* readers is a list of available reader. Last entry is terminated with
 233          * double NUL.
 234          * TODO: add support for selecting the reader; now just use the first
 235          * one.. */
 236         wpa_printf(MSG_DEBUG, "SCARD: Selected reader='%s'", readers);
 237
 238         ret = SCardConnect(scard->ctx, readers, SCARD_SHARE_SHARED,
 239                            SCARD_PROTOCOL_T0, &scard->card, &scard->protocol);
 240         if (ret != SCARD_S_SUCCESS) {
 241                 if (ret == SCARD_E_NO_SMARTCARD)
 242                         wpa_printf(MSG_INFO, "No smart card inserted.");
 243                 else
 244                         wpa_printf(MSG_WARNING, "SCardConnect err=%lx", ret);
 245                 goto failed;
 246         }
 247
 248         free(readers);
 249         readers = NULL;
 250
 251         wpa_printf(MSG_DEBUG, "SCARD: card=%ld active_protocol=%lu",
 252                    scard->card, scard->protocol);
 253
 254         blen = sizeof(buf);
 255
 256         scard->sim_type = SCARD_GSM_SIM;
 257         if (sim_type == SCARD_USIM_ONLY || sim_type == SCARD_TRY_BOTH) {
 258                 wpa_printf(MSG_DEBUG, "SCARD: verifying USIM support");
 259                 if (_scard_select_file(scard, SCARD_FILE_MF, buf, &blen,
 260                                        SCARD_USIM, NULL)) {
 261                         wpa_printf(MSG_DEBUG, "SCARD: USIM is not supported");
 262                         if (sim_type == SCARD_USIM_ONLY)
 263                                 goto failed;
 264                         wpa_printf(MSG_DEBUG, "SCARD: Trying to use GSM SIM");
 265                         scard->sim_type = SCARD_GSM_SIM;
 266                 } else {
 267                         wpa_printf(MSG_DEBUG, "SCARD: USIM is supported");
 268                         scard->sim_type = SCARD_USIM;
 269                 }
 270         }
 271
 272         if (scard->sim_type == SCARD_GSM_SIM) {
 273                 blen = sizeof(buf);
 274                 if (scard_select_file(scard, SCARD_FILE_MF, buf, &blen)) {
 275                         wpa_printf(MSG_DEBUG, "SCARD: Failed to read MF");
 276                         goto failed;
 277                 }
 278
 279                 blen = sizeof(buf);
 280                 if (scard_select_file(scard, SCARD_FILE_GSM_DF, buf, &blen)) {
 281                         wpa_printf(MSG_DEBUG, "SCARD: Failed to read GSM DF");
 282                         goto failed;
 283                 }
 284         } else {
 285                 /* Select based on AID = 3G RID */
 286                 blen = sizeof(buf);
 287                 if (_scard_select_file(scard, 0, buf, &blen, scard->sim_type,
 288                                        "\xA0\x00\x00\x00\x87")) {
 289                         wpa_printf(MSG_DEBUG, "SCARD: Failed to read 3G RID "
 290                                    "AID");
 291                         goto failed;
 292                 }
 293         }
 294
 295         /* Verify whether CHV1 (PIN1) is needed to access the card. */
 296         if (scard_pin_needed(scard, buf, blen)) {
 297                 wpa_printf(MSG_DEBUG, "PIN1 needed for SIM access");
 298                 if (pin == NULL) {
 299                         wpa_printf(MSG_INFO, "No PIN configured for SIM "
 300                                    "access");
 301                         /* TODO: ask PIN from user through a frontend (e.g.,
 302                          * wpa_cli) */
 303                         goto failed;
 304                 }
 305                 if (scard_verify_pin(scard, pin)) {
 306                         wpa_printf(MSG_INFO, "PIN verification failed for "
 307                                 "SIM access");
 308                         /* TODO: what to do? */
 309                         goto failed;
 310                 }
 311         }
 312
 313         return scard;
 314
 315 failed:
 316         free(readers);
 317         scard_deinit(scard);
 318         return NULL;
 319 }
 320
 321
 322 void scard_deinit(struct scard_data *scard)
 323 {
 324         long ret;
 325
 326         if (scard == NULL)
 327                 return;
 328
 329         wpa_printf(MSG_DEBUG, "SCARD: deinitializing smart card interface");
 330         if (scard->card) {
 331                 ret = SCardDisconnect(scard->card, SCARD_UNPOWER_CARD);
 332                 if (ret != SCARD_S_SUCCESS) {
 333                         wpa_printf(MSG_DEBUG, "SCARD: Failed to disconnect "
 334                                    "smart card (err=%ld)", ret);
 335                 }
 336         }
 337
 338         if (scard->ctx) {
 339                 ret = SCardReleaseContext(scard->ctx);
 340                 if (ret != SCARD_S_SUCCESS) {
 341                         wpa_printf(MSG_DEBUG, "Failed to release smart card "
 342                                    "context (err=%ld)", ret);
 343                 }
 344         }
 345         free(scard);
 346 }
 347
 348
 349 static long scard_transmit(struct scard_data *scard,
 350                            unsigned char *send, size_t send_len,
 351                            unsigned char *recv, size_t *recv_len)
 352 {
 353         long ret;
 354         unsigned long rlen;
 355
 356         wpa_hexdump_key(MSG_DEBUG, "SCARD: scard_transmit: send",
 357                         send, send_len);
 358         rlen = *recv_len;
 359         ret = SCardTransmit(scard->card,
 360                             scard->protocol == SCARD_PROTOCOL_T1 ?
 361                             SCARD_PCI_T1 : SCARD_PCI_T0,
 362                             send, (unsigned long) send_len,
 363                             &scard->recv_pci, recv, &rlen);
 364         *recv_len = rlen;
 365         if (ret == SCARD_S_SUCCESS) {
 366                 wpa_hexdump(MSG_DEBUG, "SCARD: scard_transmit: recv",
 367                             recv, rlen);
 368         } else {
 369                 wpa_printf(MSG_WARNING, "SCARD: SCardTransmit failed "
 370                            "(err=0x%lx)", ret);
 371         }
 372         return ret;
 373 }
 374
 375
 376 static int _scard_select_file(struct scard_data *scard, unsigned short file_id,
 377                               unsigned char *buf, size_t *buf_len,
 378                               sim_types sim_type, unsigned char *aid)
 379 {
 380         long ret;
 381         unsigned char resp[3];
 382         unsigned char cmd[10] = { SIM_CMD_SELECT };
 383         int cmdlen;
 384         unsigned char get_resp[5] = { SIM_CMD_GET_RESPONSE };
 385         size_t len, rlen;
 386
 387         if (sim_type == SCARD_USIM) {
 388                 cmd[0] = USIM_CLA;
 389                 cmd[3] = 0x04;
 390                 get_resp[0] = USIM_CLA;
 391         }
 392
 393         wpa_printf(MSG_DEBUG, "SCARD: select file %04x", file_id);
 394         if (aid) {
 395                 cmd[2] = 0x04; /* Select by AID */
 396                 cmd[4] = 5; /* len */
 397                 memcpy(cmd + 5, aid, 5);
 398                 cmdlen = 10;
 399         } else {
 400                 cmd[5] = file_id >> 8;
 401                 cmd[6] = file_id & 0xff;
 402                 cmdlen = 7;
 403         }
 404         len = sizeof(resp);
 405         ret = scard_transmit(scard, cmd, cmdlen, resp, &len);
 406         if (ret != SCARD_S_SUCCESS) {
 407                 wpa_printf(MSG_WARNING, "SCARD: SCardTransmit failed "
 408                            "(err=0x%lx)", ret);
 409                 return -1;
 410         }
 411
 412         if (len != 2) {
 413                 wpa_printf(MSG_WARNING, "SCARD: unexpected resp len "
 414                            "%d (expected 2)", (int) len);
 415                 return -1;
 416         }
 417
 418         if (resp[0] == 0x98 && resp[1] == 0x04) {
 419                 /* Security status not satisfied (PIN_WLAN) */
 420                 wpa_printf(MSG_WARNING, "SCARD: Security status not satisfied "
 421                            "(PIN_WLAN)");
 422                 return -1;
 423         }
 424
 425         if (resp[0] == 0x6e) {
 426                 wpa_printf(MSG_DEBUG, "SCARD: used CLA not supported");
 427                 return -1;
 428         }
 429
 430         if (resp[0] != 0x6c && resp[0] != 0x9f && resp[0] != 0x61) {
 431                 wpa_printf(MSG_WARNING, "SCARD: unexpected response 0x%02x "
 432                            "(expected 0x61, 0x6c, or 0x9f)", resp[0]);
 433                 return -1;
 434         }
 435         /* Normal ending of command; resp[1] bytes available */
 436         get_resp[4] = resp[1];
 437         wpa_printf(MSG_DEBUG, "SCARD: trying to get response (%d bytes)",
 438                    resp[1]);
 439
 440         rlen = *buf_len;
 441         ret = scard_transmit(scard, get_resp, sizeof(get_resp), buf, &rlen);
 442         if (ret == SCARD_S_SUCCESS) {
 443                 *buf_len = resp[1] < rlen ? resp[1] : rlen;
 444                 return 0;
 445         }
 446
 447         wpa_printf(MSG_WARNING, "SCARD: SCardTransmit err=0x%lx\n", ret);
 448         return -1;
 449 }
 450
 451
 452 static int scard_select_file(struct scard_data *scard, unsigned short file_id,
 453                              unsigned char *buf, size_t *buf_len)
 454 {
 455         return _scard_select_file(scard, file_id, buf, buf_len,
 456                                   scard->sim_type, NULL);
 457 }
 458
 459
 460 static int scard_read_file(struct scard_data *scard,
 461                            unsigned char *data, size_t len)
 462 {
 463         char cmd[5] = { SIM_CMD_READ_BIN, len };
 464         size_t blen = len + 3;
 465         unsigned char *buf;
 466         long ret;
 467
 468         buf = malloc(blen);
 469         if (buf == NULL)
 470                 return -1;
 471
 472         if (scard->sim_type == SCARD_USIM)
 473                 cmd[0] = USIM_CLA;
 474         ret = scard_transmit(scard, cmd, sizeof(cmd), buf, &blen);
 475         if (ret != SCARD_S_SUCCESS) {
 476                 free(buf);
 477                 return -2;
 478         }
 479         if (blen != len + 2) {
 480                 wpa_printf(MSG_DEBUG, "SCARD: file read returned unexpected "
 481                            "length %d (expected %d)", blen, len + 2);
 482                 free(buf);
 483                 return -3;
 484         }
 485
 486         if (buf[len] != 0x90 || buf[len + 1] != 0x00) {
 487                 wpa_printf(MSG_DEBUG, "SCARD: file read returned unexpected "
 488                            "status %02x %02x (expected 90 00)",
 489                            buf[len], buf[len + 1]);
 490                 free(buf);
 491                 return -4;
 492         }
 493
 494         memcpy(data, buf, len);
 495         free(buf);
 496
 497         return 0;
 498 }
 499
 500
 501 static int scard_verify_pin(struct scard_data *scard, char *pin)
 502 {
 503         long ret;
 504         unsigned char resp[3];
 505         char cmd[5 + 8] = { SIM_CMD_VERIFY_CHV1 };
 506         size_t len;
 507
 508         wpa_printf(MSG_DEBUG, "SCARD: verifying PIN");
 509
 510         if (pin == NULL || strlen(pin) > 8)
 511                 return -1;
 512
 513         if (scard->sim_type == SCARD_USIM)
 514                 cmd[0] = USIM_CLA;
 515         memcpy(cmd + 5, pin, strlen(pin));
 516         memset(cmd + 5 + strlen(pin), 0xff, 8 - strlen(pin));
 517
 518         len = sizeof(resp);
 519         ret = scard_transmit(scard, cmd, sizeof(cmd), resp, &len);
 520         if (ret != SCARD_S_SUCCESS)
 521                 return -2;
 522
 523         if (len != 2 || resp[0] != 0x90 || resp[1] != 0x00) {
 524                 wpa_printf(MSG_WARNING, "SCARD: PIN verification failed");
 525                 return -1;
 526         }
 527
 528         wpa_printf(MSG_DEBUG, "SCARD: PIN verified successfully");
 529         return 0;
 530 }
 531
 532
 533 int scard_get_imsi(struct scard_data *scard, char *imsi, size_t *len)
 534 {
 535         char buf[100];
 536         size_t blen, imsilen;
 537         char *pos;
 538         int i;
 539
 540         wpa_printf(MSG_DEBUG, "SCARD: reading IMSI from (GSM) EF-IMSI");
 541         blen = sizeof(buf);
 542         if (scard_select_file(scard, SCARD_FILE_GSM_EF_IMSI, buf, &blen))
 543                 return -1;
 544         if (blen < 4) {
 545                 wpa_printf(MSG_WARNING, "SCARD: too short (GSM) EF-IMSI "
 546                            "header (len=%d)", blen);
 547                 return -2;
 548         }
 549
 550         if (scard->sim_type == SCARD_GSM_SIM) {
 551                 blen = (buf[2] << 8) | buf[3];
 552         } else {
 553                 int file_size;
 554                 if (scard_parse_fsp_templ(buf, blen, NULL, &file_size))
 555                         return -3;
 556                 blen = file_size;
 557         }
 558         if (blen < 2 || blen > sizeof(buf)) {
 559                 wpa_printf(MSG_DEBUG, "SCARD: invalid IMSI file length=%d",
 560                            blen);
 561                 return -3;
 562         }
 563
 564         imsilen = (blen - 2) * 2 + 1;
 565         wpa_printf(MSG_DEBUG, "SCARD: IMSI file length=%d imsilen=%d",
 566                    blen, imsilen);
 567         if (blen < 2 || imsilen > *len) {
 568                 *len = imsilen;
 569                 return -4;
 570         }
 571
 572         if (scard_read_file(scard, buf, blen))
 573                 return -5;
 574
 575         pos = imsi;
 576         *pos++ = '0' + (buf[1] >> 4 & 0x0f);
 577         for (i = 2; i < blen; i++) {
 578                 unsigned char digit;
 579
 580                 digit = buf[i] & 0x0f;
 581                 if (digit < 10)
 582                         *pos++ = '0' + digit;
 583                 else
 584                         imsilen--;
 585
 586                 digit = buf[i] >> 4 & 0x0f;
 587                 if (digit < 10)
 588                         *pos++ = '0' + digit;
 589                 else
 590                         imsilen--;
 591         }
 592         *len = imsilen;
 593
 594         return 0;
 595 }
 596
 597
 598 int scard_gsm_auth(struct scard_data *scard, unsigned char *rand,
 599                    unsigned char *sres, unsigned char *kc)
 600 {
 601         unsigned char cmd[5 + 1 + 16] = { SIM_CMD_RUN_GSM_ALG };
 602         int cmdlen;
 603         unsigned char get_resp[5] = { SIM_CMD_GET_RESPONSE };
 604         unsigned char resp[3], buf[12 + 3 + 2];
 605         size_t len;
 606         long ret;
 607
 608         if (scard == NULL)
 609                 return -1;
 610
 611         wpa_hexdump(MSG_DEBUG, "SCARD: GSM auth - RAND", rand, 16);
 612         if (scard->sim_type == SCARD_GSM_SIM) {
 613                 cmdlen = 5 + 16;
 614                 memcpy(cmd + 5, rand, 16);
 615         } else {
 616                 cmdlen = 5 + 1 + 16;
 617                 cmd[0] = USIM_CLA;
 618                 cmd[3] = 0x80;
 619                 cmd[4] = 17;
 620                 cmd[5] = 16;
 621                 memcpy(cmd + 6, rand, 16);
 622         }
 623         len = sizeof(resp);
 624         ret = scard_transmit(scard, cmd, sizeof(cmd), resp, &len);
 625         if (ret != SCARD_S_SUCCESS)
 626                 return -2;
 627
 628         if ((scard->sim_type == SCARD_GSM_SIM &&
 629              (len != 2 || resp[0] != 0x9f || resp[1] != 0x0c)) ||
 630             (scard->sim_type == SCARD_USIM &&
 631              (len != 2 || resp[0] != 0x61 || resp[1] != 0x0e))) {
 632                 wpa_printf(MSG_WARNING, "SCARD: unexpected response for GSM "
 633                            "auth request (len=%d resp=%02x %02x)",
 634                            len, resp[0], resp[1]);
 635                 return -3;
 636         }
 637         get_resp[4] = resp[1];
 638
 639         len = sizeof(buf);
 640         ret = scard_transmit(scard, get_resp, sizeof(get_resp), buf, &len);
 641         if (ret != SCARD_S_SUCCESS)
 642                 return -4;
 643
 644         if (scard->sim_type == SCARD_GSM_SIM) {
 645                 if (len != 4 + 8 + 2) {
 646                         wpa_printf(MSG_WARNING, "SCARD: unexpected data "
 647                                    "length for GSM auth (len=%d, expected 14)",
 648                                    len);
 649                         return -5;
 650                 }
 651                 memcpy(sres, buf, 4);
 652                 memcpy(kc, buf + 4, 8);
 653         } else {
 654                 if (len != 1 + 4 + 1 + 8 + 2) {
 655                         wpa_printf(MSG_WARNING, "SCARD: unexpected data "
 656                                    "length for USIM auth (len=%d, "
 657                                    "expected 16)", len);
 658                         return -5;
 659                 }
 660                 if (buf[0] != 4 || buf[5] != 8) {
 661                         wpa_printf(MSG_WARNING, "SCARD: unexpected SREC/Kc "
 662                                    "length (%d %d, expected 4 8)",
 663                                    buf[0], buf[5]);
 664                 }
 665                 memcpy(sres, buf + 1, 4);
 666                 memcpy(kc, buf + 6, 8);
 667         }
 668
 669         wpa_hexdump(MSG_DEBUG, "SCARD: GSM auth - SRES", sres, 4);
 670         wpa_hexdump(MSG_DEBUG, "SCARD: GSM auth - Kc", kc, 8);
 671
 672         return 0;
 673 }
 674
 675
 676 int scard_umts_auth(struct scard_data *scard, unsigned char *rand,
 677                     unsigned char *autn, unsigned char *res, size_t *res_len,
 678                     unsigned char *ik, unsigned char *ck, unsigned char *auts)
 679 {
 680         unsigned char cmd[5 + 1 + AKA_RAND_LEN + 1 + AKA_AUTN_LEN] =
 681                 { USIM_CMD_RUN_UMTS_ALG };
 682         int cmdlen;
 683         unsigned char get_resp[5] = { USIM_CMD_GET_RESPONSE };
 684         unsigned char resp[3], buf[64], *pos, *end;
 685         size_t len;
 686         long ret;
 687
 688         if (scard == NULL)
 689                 return -1;
 690
 691         if (scard->sim_type == SCARD_GSM_SIM) {
 692                 wpa_printf(MSG_ERROR, "SCARD: Non-USIM card - cannot do UMTS "
 693                            "auth");
 694                 return -1;
 695         }
 696
 697         wpa_hexdump(MSG_DEBUG, "SCARD: UMTS auth - RAND", rand, AKA_RAND_LEN);
 698         wpa_hexdump(MSG_DEBUG, "SCARD: UMTS auth - AUTN", autn, AKA_AUTN_LEN);
 699         cmdlen = 5 + 1 + AKA_RAND_LEN + 1 + AKA_AUTN_LEN;
 700         cmd[5] = AKA_RAND_LEN;
 701         memcpy(cmd + 6, rand, AKA_RAND_LEN);
 702         cmd[6 + AKA_RAND_LEN] = AKA_AUTN_LEN;
 703         memcpy(cmd + 6 + AKA_RAND_LEN + 1, autn, AKA_AUTN_LEN);
 704
 705         len = sizeof(resp);
 706         ret = scard_transmit(scard, cmd, sizeof(cmd), resp, &len);
 707         if (ret != SCARD_S_SUCCESS)
 708                 return -1;
 709
 710         if (len >= 0 && len <= sizeof(resp))
 711                 wpa_hexdump(MSG_DEBUG, "SCARD: UMTS alg response", resp, len);
 712
 713         if (len == 2 && resp[0] == 0x98 && resp[1] == 0x62) {
 714                 wpa_printf(MSG_WARNING, "SCARD: UMTS auth failed - "
 715                            "MAC != XMAC");
 716                 return -1;
 717         } else if (len != 2 || resp[0] != 0x61) {
 718                 wpa_printf(MSG_WARNING, "SCARD: unexpected response for UMTS "
 719                            "auth request (len=%d resp=%02x %02x)",
 720                            len, resp[0], resp[1]);
 721                 return -1;
 722         }
 723         get_resp[4] = resp[1];
 724
 725         len = sizeof(buf);
 726         ret = scard_transmit(scard, get_resp, sizeof(get_resp), buf, &len);
 727         if (ret != SCARD_S_SUCCESS || len < 0 || len > sizeof(buf))
 728                 return -1;
 729
 730         wpa_hexdump(MSG_DEBUG, "SCARD: UMTS get response result", buf, len);
 731         if (len >= 2 + AKA_AUTS_LEN && buf[0] == 0xdc &&
 732             buf[1] == AKA_AUTS_LEN) {
 733                 wpa_printf(MSG_DEBUG, "SCARD: UMTS Synchronization-Failure");
 734                 memcpy(auts, buf + 2, AKA_AUTS_LEN);
 735                 wpa_hexdump(MSG_DEBUG, "SCARD: AUTS", auts, AKA_AUTS_LEN);
 736                 return -2;
 737         } else if (len >= 6 + IK_LEN + CK_LEN && buf[0] == 0xdb) {
 738                 pos = buf + 1;
 739                 end = buf + len;
 740
 741                 /* RES */
 742                 if (pos[0] > RES_MAX_LEN || pos + pos[0] > end) {
 743                         wpa_printf(MSG_DEBUG, "SCARD: Invalid RES");
 744                         return -1;
 745                 }
 746                 *res_len = *pos++;
 747                 memcpy(res, pos, *res_len);
 748                 pos += *res_len;
 749                 wpa_hexdump(MSG_DEBUG, "SCARD: RES", res, *res_len);
 750
 751                 /* CK */
 752                 if (pos[0] != CK_LEN || pos + CK_LEN > end) {
 753                         wpa_printf(MSG_DEBUG, "SCARD: Invalid CK");
 754                         return -1;
 755                 }
 756                 pos++;
 757                 memcpy(ck, pos, CK_LEN);
 758                 pos += CK_LEN;
 759                 wpa_hexdump(MSG_DEBUG, "SCARD: CK", ck, CK_LEN);
 760
 761                 /* IK */
 762                 if (pos[0] != IK_LEN || pos + IK_LEN > end) {
 763                         wpa_printf(MSG_DEBUG, "SCARD: Invalid IK");
 764                         return -1;
 765                 }
 766                 pos++;
 767                 memcpy(ik, pos, IK_LEN);
 768                 pos += IK_LEN;
 769                 wpa_hexdump(MSG_DEBUG, "SCARD: IK", ik, IK_LEN);
 770
 771                 return 0;
 772         }
 773
 774         wpa_printf(MSG_DEBUG, "SCARD: Unrecognized response");
 775         return -1;
 776 }