libcacard/card_7816.c

   1 /*
   2  * Implement the 7816 portion of the card spec
   3  *
   4  * This code is licensed under the GNU LGPL, version 2.1 or later.
   5  * See the COPYING.LIB file in the top-level directory.
   6  */
   7
   8 #include "glib-compat.h"
   9
  10 #include <string.h>
  11
  12 #include "vcard.h"
  13 #include "vcard_emul.h"
  14 #include "card_7816.h"
  15
  16 /*
  17  * set the status bytes based on the status word
  18  */
  19 static void
  20 vcard_response_set_status(VCardResponse *response, vcard_7816_status_t status)
  21 {
  22     unsigned char sw1, sw2;
  23     response->b_status = status; /* make sure the status and swX representations
  24                                   * are consistent */
  25     sw1 = (status >> 8) & 0xff;
  26     sw2 = status & 0xff;
  27     response->b_sw1 = sw1;
  28     response->b_sw2 = sw2;
  29     response->b_data[response->b_len] = sw1;
  30     response->b_data[response->b_len+1] = sw2;
  31 }
  32
  33 /*
  34  * set the status bytes in a response buffer
  35  */
  36 static void
  37 vcard_response_set_status_bytes(VCardResponse *response,
  38                                unsigned char sw1, unsigned char sw2)
  39 {
  40     response->b_status = sw1 << 8 | sw2;
  41     response->b_sw1 = sw1;
  42     response->b_sw2 = sw2;
  43     response->b_data[response->b_len] = sw1;
  44     response->b_data[response->b_len+1] = sw2;
  45 }
  46
  47 /*
  48  * allocate a VCardResponse structure, plus space for the data buffer, and
  49  * set up everything but the resonse bytes.
  50  */
  51 VCardResponse *
  52 vcard_response_new_data(unsigned char *buf, int len)
  53 {
  54     VCardResponse *new_response;
  55
  56     new_response = g_new(VCardResponse, 1);
  57     new_response->b_data = g_malloc(len + 2);
  58     memcpy(new_response->b_data, buf, len);
  59     new_response->b_total_len = len+2;
  60     new_response->b_len = len;
  61     new_response->b_type = VCARD_MALLOC;
  62     return new_response;
  63 }
  64
  65 static VCardResponse *
  66 vcard_init_buffer_response(VCard *card, unsigned char *buf, int len)
  67 {
  68     VCardResponse *response;
  69     VCardBufferResponse *buffer_response;
  70
  71     buffer_response = vcard_get_buffer_response(card);
  72     if (buffer_response) {
  73         vcard_set_buffer_response(card, NULL);
  74         vcard_buffer_response_delete(buffer_response);
  75     }
  76     buffer_response = vcard_buffer_response_new(buf, len);
  77     if (buffer_response == NULL) {
  78         return NULL;
  79     }
  80     response = vcard_response_new_status_bytes(VCARD7816_SW1_RESPONSE_BYTES,
  81                                                len > 255 ? 0 : len);
  82     if (response == NULL) {
  83         return NULL;
  84     }
  85     vcard_set_buffer_response(card, buffer_response);
  86     return response;
  87 }
  88
  89 /*
  90  * general buffer to hold results from APDU calls
  91  */
  92 VCardResponse *
  93 vcard_response_new(VCard *card, unsigned char *buf,
  94                    int len, int Le, vcard_7816_status_t status)
  95 {
  96     VCardResponse *new_response;
  97
  98     if (len > Le) {
  99         return vcard_init_buffer_response(card, buf, len);
 100     }
 101     new_response = vcard_response_new_data(buf, len);
 102     if (new_response == NULL) {
 103         return NULL;
 104     }
 105     vcard_response_set_status(new_response, status);
 106     return new_response;
 107 }
 108
 109 /*
 110  * general buffer to hold results from APDU calls
 111  */
 112 VCardResponse *
 113 vcard_response_new_bytes(VCard *card, unsigned char *buf, int len, int Le,
 114                          unsigned char sw1, unsigned char sw2)
 115 {
 116     VCardResponse *new_response;
 117
 118     if (len > Le) {
 119         return vcard_init_buffer_response(card, buf, len);
 120     }
 121     new_response = vcard_response_new_data(buf, len);
 122     if (new_response == NULL) {
 123         return NULL;
 124     }
 125     vcard_response_set_status_bytes(new_response, sw1, sw2);
 126     return new_response;
 127 }
 128
 129 /*
 130  * get a new Response buffer that only has a status.
 131  */
 132 static VCardResponse *
 133 vcard_response_new_status(vcard_7816_status_t status)
 134 {
 135     VCardResponse *new_response;
 136
 137     new_response = g_new(VCardResponse, 1);
 138     new_response->b_data = &new_response->b_sw1;
 139     new_response->b_len = 0;
 140     new_response->b_total_len = 2;
 141     new_response->b_type = VCARD_MALLOC_STRUCT;
 142     vcard_response_set_status(new_response, status);
 143     return new_response;
 144 }
 145
 146 /*
 147  * same as above, but specify the status as separate bytes
 148  */
 149 VCardResponse *
 150 vcard_response_new_status_bytes(unsigned char sw1, unsigned char sw2)
 151 {
 152     VCardResponse *new_response;
 153
 154     new_response = g_new(VCardResponse, 1);
 155     new_response->b_data = &new_response->b_sw1;
 156     new_response->b_len = 0;
 157     new_response->b_total_len = 2;
 158     new_response->b_type = VCARD_MALLOC_STRUCT;
 159     vcard_response_set_status_bytes(new_response, sw1, sw2);
 160     return new_response;
 161 }
 162
 163
 164 /*
 165  * free the response buffer. The Buffer has a type to handle the buffer
 166  * allocated in other ways than through malloc.
 167  */
 168 void
 169 vcard_response_delete(VCardResponse *response)
 170 {
 171     if (response == NULL) {
 172         return;
 173     }
 174     switch (response->b_type) {
 175     case VCARD_MALLOC:
 176         /* everything was malloc'ed */
 177         g_free(response->b_data);
 178         g_free(response);
 179         break;
 180     case VCARD_MALLOC_DATA:
 181         /* only the data buffer was malloc'ed */
 182         g_free(response->b_data);
 183         break;
 184     case VCARD_MALLOC_STRUCT:
 185         /* only the structure was malloc'ed */
 186         g_free(response);
 187         break;
 188     case VCARD_STATIC:
 189         break;
 190     }
 191 }
 192
 193 /*
 194  * decode the class bit and set our generic type field, channel, and
 195  * secure messaging values.
 196  */
 197 static vcard_7816_status_t
 198 vcard_apdu_set_class(VCardAPDU *apdu) {
 199     apdu->a_channel = 0;
 200     apdu->a_secure_messaging = 0;
 201     apdu->a_type = apdu->a_cla & 0xf0;
 202     apdu->a_gen_type = VCARD_7816_ISO;
 203
 204     /* parse the class  tables 8 & 9 of the 7816-4 Part 4 spec */
 205     switch (apdu->a_type) {
 206         /* we only support the basic types */
 207     case 0x00:
 208     case 0x80:
 209     case 0x90:
 210     case 0xa0:
 211         apdu->a_channel = apdu->a_cla & 3;
 212         apdu->a_secure_messaging = apdu->a_cla & 0xe;
 213         break;
 214     case 0xb0:
 215     case 0xc0:
 216         break;
 217
 218     case 0x10:
 219     case 0x20:
 220     case 0x30:
 221     case 0x40:
 222     case 0x50:
 223     case 0x60:
 224     case 0x70:
 225         /* Reserved for future use */
 226         apdu->a_gen_type = VCARD_7816_RFU;
 227         break;
 228     case 0xd0:
 229     case 0xe0:
 230     case 0xf0:
 231     default:
 232         apdu->a_gen_type =
 233             (apdu->a_cla == 0xff) ? VCARD_7816_PTS : VCARD_7816_PROPRIETARY;
 234         break;
 235     }
 236     return VCARD7816_STATUS_SUCCESS;
 237 }
 238
 239 /*
 240  * set the Le and Lc fields according to table 5 of the
 241  * 7816-4 part 4 spec
 242  */
 243 static vcard_7816_status_t
 244 vcard_apdu_set_length(VCardAPDU *apdu)
 245 {
 246     int L, Le;
 247
 248     /* process according to table 5 of the 7816-4 Part 4 spec.
 249      * variable names match the variables in the spec */
 250     L = apdu->a_len-4; /* fixed APDU header */
 251     apdu->a_Lc = 0;
 252     apdu->a_Le = 0;
 253     apdu->a_body = NULL;
 254     switch (L) {
 255     case 0:
 256         /* 1 minimal apdu */
 257         return VCARD7816_STATUS_SUCCESS;
 258     case 1:
 259         /* 2S only return values apdu */
 260         /*   zero maps to 256 here */
 261         apdu->a_Le = apdu->a_header->ah_Le ?
 262                          apdu->a_header->ah_Le : 256;
 263         return VCARD7816_STATUS_SUCCESS;
 264     default:
 265         /* if the ah_Le byte is zero and we have more than
 266          * 1 byte in the header, then we must be using extended Le and Lc.
 267          * process the extended now. */
 268         if (apdu->a_header->ah_Le == 0) {
 269             if (L < 3) {
 270                 /* coding error, need at least 3 bytes */
 271                 return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
 272             }
 273             /* calculate the first extended value. Could be either Le or Lc */
 274             Le = (apdu->a_header->ah_body[0] << 8)
 275                || apdu->a_header->ah_body[1];
 276             if (L == 3) {
 277                 /* 2E extended, return data only */
 278                 /*   zero maps to 65536 */
 279                 apdu->a_Le = Le ? Le : 65536;
 280                 return VCARD7816_STATUS_SUCCESS;
 281             }
 282             if (Le == 0) {
 283                 /* reserved for future use, probably for next time we need
 284                  * to extend the lengths */
 285                 return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
 286             }
 287             /* we know that the first extended value is Lc now */
 288             apdu->a_Lc = Le;
 289             apdu->a_body = &apdu->a_header->ah_body[2];
 290             if (L == Le+3) {
 291                 /* 3E extended, only body parameters */
 292                 return VCARD7816_STATUS_SUCCESS;
 293             }
 294             if (L == Le+5) {
 295                 /* 4E extended, parameters and return data */
 296                 Le = (apdu->a_data[apdu->a_len-2] << 8)
 297                    || apdu->a_data[apdu->a_len-1];
 298                 apdu->a_Le = Le ? Le : 65536;
 299                 return VCARD7816_STATUS_SUCCESS;
 300             }
 301             return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
 302         }
 303         /* not extended */
 304         apdu->a_Lc = apdu->a_header->ah_Le;
 305         apdu->a_body = &apdu->a_header->ah_body[0];
 306         if (L ==  apdu->a_Lc + 1) {
 307             /* 3S only body parameters */
 308             return VCARD7816_STATUS_SUCCESS;
 309         }
 310         if (L ==  apdu->a_Lc + 2) {
 311             /* 4S parameters and return data */
 312             Le = apdu->a_data[apdu->a_len-1];
 313             apdu->a_Le = Le ?  Le : 256;
 314             return VCARD7816_STATUS_SUCCESS;
 315         }
 316         break;
 317     }
 318     return VCARD7816_STATUS_ERROR_WRONG_LENGTH;
 319 }
 320
 321 /*
 322  * create a new APDU from a raw set of bytes. This will decode all the
 323  * above fields. users of VCARDAPDU's can then depend on the already decoded
 324  * values.
 325  */
 326 VCardAPDU *
 327 vcard_apdu_new(unsigned char *raw_apdu, int len, vcard_7816_status_t *status)
 328 {
 329     VCardAPDU *new_apdu;
 330
 331     *status = VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE;
 332     if (len < 4) {
 333         *status = VCARD7816_STATUS_ERROR_WRONG_LENGTH;
 334         return NULL;
 335     }
 336
 337     new_apdu = g_new(VCardAPDU, 1);
 338     new_apdu->a_data = g_memdup(raw_apdu, len);
 339     new_apdu->a_len = len;
 340     *status = vcard_apdu_set_class(new_apdu);
 341     if (*status != VCARD7816_STATUS_SUCCESS) {
 342         g_free(new_apdu);
 343         return NULL;
 344     }
 345     *status = vcard_apdu_set_length(new_apdu);
 346     if (*status != VCARD7816_STATUS_SUCCESS) {
 347         g_free(new_apdu);
 348         new_apdu = NULL;
 349     }
 350     return new_apdu;
 351 }
 352
 353 void
 354 vcard_apdu_delete(VCardAPDU *apdu)
 355 {
 356     if (apdu == NULL) {
 357         return;
 358     }
 359     g_free(apdu->a_data);
 360     g_free(apdu);
 361 }
 362
 363
 364 /*
 365  * declare response buffers for all the 7816 defined error codes
 366  */
 367 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_SUCCESS)
 368 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING)
 369 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_RET_CORUPT)
 370 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_BUF_END_BEFORE_LE)
 371 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_INVALID_FILE_SELECTED)
 372 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_FCI_FORMAT_INVALID)
 373 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_CHANGE)
 374 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_WARNING_FILE_FILLED)
 375 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_EXC_ERROR)
 376 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_EXC_ERROR_CHANGE)
 377 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE)
 378 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_WRONG_LENGTH)
 379 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CLA_NOT_SUPPORTED)
 380 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CHANNEL_NOT_SUPPORTED)
 381 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED)
 382 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED)
 383 VCARD_RESPONSE_NEW_STATIC_STATUS(
 384                     VCARD7816_STATUS_ERROR_COMMAND_INCOMPATIBLE_WITH_FILE)
 385 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SECURITY_NOT_SATISFIED)
 386 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_AUTHENTICATION_BLOCKED)
 387 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_DATA_INVALID)
 388 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED)
 389 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_DATA_NO_EF)
 390 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SM_OBJECT_MISSING)
 391 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_SM_OBJECT_INCORRECT)
 392 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_WRONG_PARAMETERS)
 393 VCARD_RESPONSE_NEW_STATIC_STATUS(
 394                             VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_IN_DATA)
 395 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED)
 396 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_FILE_NOT_FOUND)
 397 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_RECORD_NOT_FOUND)
 398 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_NO_SPACE_FOR_FILE)
 399 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_LC_TLV_INCONSISTENT)
 400 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_P1_P2_INCORRECT)
 401 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_LC_P1_P2_INCONSISTENT)
 402 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_DATA_NOT_FOUND)
 403 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_2)
 404 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_INS_CODE_INVALID)
 405 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_CLA_INVALID)
 406 VCARD_RESPONSE_NEW_STATIC_STATUS(VCARD7816_STATUS_ERROR_GENERAL)
 407
 408 /*
 409  * return a single response code. This function cannot fail. It will always
 410  * return a response.
 411  */
 412 VCardResponse *
 413 vcard_make_response(vcard_7816_status_t status)
 414 {
 415     VCardResponse *response;
 416
 417     switch (status) {
 418     /* known 7816 response codes */
 419     case VCARD7816_STATUS_SUCCESS:
 420         return VCARD_RESPONSE_GET_STATIC(
 421                     VCARD7816_STATUS_SUCCESS);
 422     case VCARD7816_STATUS_WARNING:
 423         return VCARD_RESPONSE_GET_STATIC(
 424                     VCARD7816_STATUS_WARNING);
 425     case VCARD7816_STATUS_WARNING_RET_CORUPT:
 426         return VCARD_RESPONSE_GET_STATIC(
 427                     VCARD7816_STATUS_WARNING_RET_CORUPT);
 428     case VCARD7816_STATUS_WARNING_BUF_END_BEFORE_LE:
 429         return VCARD_RESPONSE_GET_STATIC(
 430                     VCARD7816_STATUS_WARNING_BUF_END_BEFORE_LE);
 431     case VCARD7816_STATUS_WARNING_INVALID_FILE_SELECTED:
 432         return VCARD_RESPONSE_GET_STATIC(
 433                     VCARD7816_STATUS_WARNING_INVALID_FILE_SELECTED);
 434     case VCARD7816_STATUS_WARNING_FCI_FORMAT_INVALID:
 435         return VCARD_RESPONSE_GET_STATIC(
 436                     VCARD7816_STATUS_WARNING_FCI_FORMAT_INVALID);
 437     case VCARD7816_STATUS_WARNING_CHANGE:
 438         return VCARD_RESPONSE_GET_STATIC(
 439                     VCARD7816_STATUS_WARNING_CHANGE);
 440     case VCARD7816_STATUS_WARNING_FILE_FILLED:
 441         return VCARD_RESPONSE_GET_STATIC(
 442                     VCARD7816_STATUS_WARNING_FILE_FILLED);
 443     case VCARD7816_STATUS_EXC_ERROR:
 444         return VCARD_RESPONSE_GET_STATIC(
 445                     VCARD7816_STATUS_EXC_ERROR);
 446     case VCARD7816_STATUS_EXC_ERROR_CHANGE:
 447         return VCARD_RESPONSE_GET_STATIC(
 448                     VCARD7816_STATUS_EXC_ERROR_CHANGE);
 449     case VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE:
 450         return VCARD_RESPONSE_GET_STATIC(
 451                     VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
 452     case VCARD7816_STATUS_ERROR_WRONG_LENGTH:
 453         return VCARD_RESPONSE_GET_STATIC(
 454                     VCARD7816_STATUS_ERROR_WRONG_LENGTH);
 455     case VCARD7816_STATUS_ERROR_CLA_NOT_SUPPORTED:
 456         return VCARD_RESPONSE_GET_STATIC(
 457                     VCARD7816_STATUS_ERROR_CLA_NOT_SUPPORTED);
 458     case VCARD7816_STATUS_ERROR_CHANNEL_NOT_SUPPORTED:
 459         return VCARD_RESPONSE_GET_STATIC(
 460                     VCARD7816_STATUS_ERROR_CHANNEL_NOT_SUPPORTED);
 461     case VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED:
 462         return VCARD_RESPONSE_GET_STATIC(
 463                     VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED);
 464     case VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED:
 465         return VCARD_RESPONSE_GET_STATIC(
 466                     VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
 467     case VCARD7816_STATUS_ERROR_COMMAND_INCOMPATIBLE_WITH_FILE:
 468         return VCARD_RESPONSE_GET_STATIC(
 469                     VCARD7816_STATUS_ERROR_COMMAND_INCOMPATIBLE_WITH_FILE);
 470     case VCARD7816_STATUS_ERROR_SECURITY_NOT_SATISFIED:
 471         return VCARD_RESPONSE_GET_STATIC(
 472                     VCARD7816_STATUS_ERROR_SECURITY_NOT_SATISFIED);
 473     case VCARD7816_STATUS_ERROR_AUTHENTICATION_BLOCKED:
 474         return VCARD_RESPONSE_GET_STATIC(
 475                     VCARD7816_STATUS_ERROR_AUTHENTICATION_BLOCKED);
 476     case VCARD7816_STATUS_ERROR_DATA_INVALID:
 477         return VCARD_RESPONSE_GET_STATIC(
 478                     VCARD7816_STATUS_ERROR_DATA_INVALID);
 479     case VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED:
 480         return VCARD_RESPONSE_GET_STATIC(
 481                     VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED);
 482     case VCARD7816_STATUS_ERROR_DATA_NO_EF:
 483         return VCARD_RESPONSE_GET_STATIC(
 484                     VCARD7816_STATUS_ERROR_DATA_NO_EF);
 485     case VCARD7816_STATUS_ERROR_SM_OBJECT_MISSING:
 486         return VCARD_RESPONSE_GET_STATIC(
 487                     VCARD7816_STATUS_ERROR_SM_OBJECT_MISSING);
 488     case VCARD7816_STATUS_ERROR_SM_OBJECT_INCORRECT:
 489         return VCARD_RESPONSE_GET_STATIC(
 490                     VCARD7816_STATUS_ERROR_SM_OBJECT_INCORRECT);
 491     case VCARD7816_STATUS_ERROR_WRONG_PARAMETERS:
 492         return VCARD_RESPONSE_GET_STATIC(
 493                     VCARD7816_STATUS_ERROR_WRONG_PARAMETERS);
 494     case VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_IN_DATA:
 495         return VCARD_RESPONSE_GET_STATIC(
 496                     VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_IN_DATA);
 497     case VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED:
 498         return VCARD_RESPONSE_GET_STATIC(
 499                     VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED);
 500     case VCARD7816_STATUS_ERROR_FILE_NOT_FOUND:
 501         return VCARD_RESPONSE_GET_STATIC(
 502                     VCARD7816_STATUS_ERROR_FILE_NOT_FOUND);
 503     case VCARD7816_STATUS_ERROR_RECORD_NOT_FOUND:
 504         return VCARD_RESPONSE_GET_STATIC(
 505                     VCARD7816_STATUS_ERROR_RECORD_NOT_FOUND);
 506     case VCARD7816_STATUS_ERROR_NO_SPACE_FOR_FILE:
 507         return VCARD_RESPONSE_GET_STATIC(
 508                     VCARD7816_STATUS_ERROR_NO_SPACE_FOR_FILE);
 509     case VCARD7816_STATUS_ERROR_LC_TLV_INCONSISTENT:
 510         return VCARD_RESPONSE_GET_STATIC(
 511                     VCARD7816_STATUS_ERROR_LC_TLV_INCONSISTENT);
 512     case VCARD7816_STATUS_ERROR_P1_P2_INCORRECT:
 513         return VCARD_RESPONSE_GET_STATIC(
 514                     VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
 515     case VCARD7816_STATUS_ERROR_LC_P1_P2_INCONSISTENT:
 516         return VCARD_RESPONSE_GET_STATIC(
 517                     VCARD7816_STATUS_ERROR_LC_P1_P2_INCONSISTENT);
 518     case VCARD7816_STATUS_ERROR_DATA_NOT_FOUND:
 519         return VCARD_RESPONSE_GET_STATIC(
 520                     VCARD7816_STATUS_ERROR_DATA_NOT_FOUND);
 521     case VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_2:
 522         return VCARD_RESPONSE_GET_STATIC(
 523                     VCARD7816_STATUS_ERROR_WRONG_PARAMETERS_2);
 524     case VCARD7816_STATUS_ERROR_INS_CODE_INVALID:
 525         return VCARD_RESPONSE_GET_STATIC(
 526                     VCARD7816_STATUS_ERROR_INS_CODE_INVALID);
 527     case VCARD7816_STATUS_ERROR_CLA_INVALID:
 528         return VCARD_RESPONSE_GET_STATIC(
 529                     VCARD7816_STATUS_ERROR_CLA_INVALID);
 530     case VCARD7816_STATUS_ERROR_GENERAL:
 531         return VCARD_RESPONSE_GET_STATIC(
 532                     VCARD7816_STATUS_ERROR_GENERAL);
 533     default:
 534         /* we don't know this status code, create a response buffer to
 535          * hold it */
 536         response = vcard_response_new_status(status);
 537         if (response == NULL) {
 538             /* couldn't allocate the buffer, return memmory error */
 539             return VCARD_RESPONSE_GET_STATIC(
 540                         VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
 541         }
 542         return response;
 543     }
 544 }
 545
 546 /*
 547  * Add File card support here if you need it.
 548  */
 549 static VCardStatus
 550 vcard7816_file_system_process_apdu(VCard *card, VCardAPDU *apdu,
 551                                    VCardResponse **response)
 552 {
 553     /* TODO: if we want to support a virtual file system card, we do it here.
 554      * It would probably be a pkcs #15 card type */
 555     *response = vcard_make_response(
 556                     VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
 557     return VCARD_DONE;
 558 }
 559
 560 /*
 561  * VM card (including java cards)
 562  */
 563 static VCardStatus
 564 vcard7816_vm_process_apdu(VCard *card, VCardAPDU *apdu,
 565                           VCardResponse **response)
 566 {
 567     int bytes_to_copy, next_byte_count, count;
 568     VCardApplet *current_applet;
 569     VCardBufferResponse *buffer_response;
 570     vcard_7816_status_t status;
 571
 572     /* parse the class first */
 573     if (apdu->a_gen_type !=  VCARD_7816_ISO) {
 574         *response = vcard_make_response(
 575                         VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
 576         return VCARD_DONE;
 577     }
 578
 579     /* use a switch so that if we need to support secure channel stuff later,
 580      * we know where to put it */
 581     switch (apdu->a_secure_messaging) {
 582     case 0x0: /* no SM */
 583         break;
 584     case 0x4: /* proprietary SM */
 585     case 0x8: /* header not authenticated */
 586     case 0xc: /* header authenticated */
 587     default:
 588         /* for now, don't try to support secure channel stuff in the
 589          * virtual card. */
 590         *response = vcard_make_response(
 591                         VCARD7816_STATUS_ERROR_SECURE_NOT_SUPPORTED);
 592         return VCARD_DONE;
 593     }
 594
 595     /* now parse the instruction */
 596     switch (apdu->a_ins) {
 597     case  VCARD7816_INS_MANAGE_CHANNEL: /* secure channel op */
 598     case  VCARD7816_INS_EXTERNAL_AUTHENTICATE: /* secure channel op */
 599     case  VCARD7816_INS_GET_CHALLENGE: /* secure channel op */
 600     case  VCARD7816_INS_INTERNAL_AUTHENTICATE: /* secure channel op */
 601     case  VCARD7816_INS_ERASE_BINARY: /* applet control op */
 602     case  VCARD7816_INS_READ_BINARY: /* applet control op */
 603     case  VCARD7816_INS_WRITE_BINARY: /* applet control op */
 604     case  VCARD7816_INS_UPDATE_BINARY: /* applet control op */
 605     case  VCARD7816_INS_READ_RECORD: /* file op */
 606     case  VCARD7816_INS_WRITE_RECORD: /* file op */
 607     case  VCARD7816_INS_UPDATE_RECORD: /* file op */
 608     case  VCARD7816_INS_APPEND_RECORD: /* file op */
 609     case  VCARD7816_INS_ENVELOPE:
 610     case  VCARD7816_INS_PUT_DATA:
 611         *response = vcard_make_response(
 612                             VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
 613         break;
 614
 615     case  VCARD7816_INS_SELECT_FILE:
 616         if (apdu->a_p1 != 0x04) {
 617             *response = vcard_make_response(
 618                             VCARD7816_STATUS_ERROR_FUNCTION_NOT_SUPPORTED);
 619             break;
 620         }
 621
 622         /* side effect, deselect the current applet if no applet has been found
 623          * */
 624         current_applet = vcard_find_applet(card, apdu->a_body, apdu->a_Lc);
 625         vcard_select_applet(card, apdu->a_channel, current_applet);
 626         if (current_applet) {
 627             unsigned char *aid;
 628             int aid_len;
 629             aid = vcard_applet_get_aid(current_applet, &aid_len);
 630             *response = vcard_response_new(card, aid, aid_len, apdu->a_Le,
 631                                           VCARD7816_STATUS_SUCCESS);
 632         } else {
 633             *response = vcard_make_response(
 634                              VCARD7816_STATUS_ERROR_FILE_NOT_FOUND);
 635         }
 636         break;
 637
 638     case  VCARD7816_INS_VERIFY:
 639         if ((apdu->a_p1 != 0x00) || (apdu->a_p2 != 0x00)) {
 640             *response = vcard_make_response(
 641                             VCARD7816_STATUS_ERROR_WRONG_PARAMETERS);
 642         } else {
 643             if (apdu->a_Lc == 0) {
 644                 /* handle pin count if possible */
 645                 count = vcard_emul_get_login_count(card);
 646                 if (count < 0) {
 647                     *response = vcard_make_response(
 648                                     VCARD7816_STATUS_ERROR_DATA_NOT_FOUND);
 649                 } else {
 650                     if (count > 0xf) {
 651                         count = 0xf;
 652                     }
 653                     *response = vcard_response_new_status_bytes(
 654                                                 VCARD7816_SW1_WARNING_CHANGE,
 655                                                                 0xc0 | count);
 656                     if (*response == NULL) {
 657                         *response = vcard_make_response(
 658                                     VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
 659                     }
 660                 }
 661             } else {
 662                     status = vcard_emul_login(card, apdu->a_body, apdu->a_Lc);
 663                 *response = vcard_make_response(status);
 664             }
 665         }
 666         break;
 667
 668     case VCARD7816_INS_GET_RESPONSE:
 669         buffer_response = vcard_get_buffer_response(card);
 670         if (!buffer_response) {
 671             *response = vcard_make_response(
 672                             VCARD7816_STATUS_ERROR_DATA_NOT_FOUND);
 673             /* handle error */
 674             break;
 675         }
 676         bytes_to_copy = MIN(buffer_response->len, apdu->a_Le);
 677         next_byte_count = MIN(256, buffer_response->len - bytes_to_copy);
 678         *response = vcard_response_new_bytes(
 679                         card, buffer_response->current, bytes_to_copy,
 680                         apdu->a_Le,
 681                         next_byte_count ?
 682                         VCARD7816_SW1_RESPONSE_BYTES : VCARD7816_SW1_SUCCESS,
 683                         next_byte_count);
 684         buffer_response->current += bytes_to_copy;
 685         buffer_response->len -= bytes_to_copy;
 686         if (*response == NULL || (next_byte_count == 0)) {
 687             vcard_set_buffer_response(card, NULL);
 688             vcard_buffer_response_delete(buffer_response);
 689         }
 690         if (*response == NULL) {
 691             *response =
 692                 vcard_make_response(VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
 693         }
 694         break;
 695
 696     case VCARD7816_INS_GET_DATA:
 697         *response =
 698             vcard_make_response(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
 699         break;
 700
 701     default:
 702         *response =
 703             vcard_make_response(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
 704         break;
 705     }
 706
 707     /* response should have been set somewhere */
 708     assert(*response != NULL);
 709     return VCARD_DONE;
 710 }
 711
 712
 713 /*
 714  * APDU processing starts here. This routes the card processing stuff to the
 715  * right location.
 716  */
 717 VCardStatus
 718 vcard_process_apdu(VCard *card, VCardAPDU *apdu, VCardResponse **response)
 719 {
 720     VCardStatus status;
 721     VCardBufferResponse *buffer_response;
 722
 723     /* first handle any PTS commands, which aren't really APDU's */
 724     if (apdu->a_type == VCARD_7816_PTS) {
 725         /* the PTS responses aren't really responses either */
 726         *response = vcard_response_new_data(apdu->a_data, apdu->a_len);
 727         /* PTS responses have no status bytes */
 728         (*response)->b_total_len = (*response)->b_len;
 729         return VCARD_DONE;
 730     }
 731     buffer_response = vcard_get_buffer_response(card);
 732     if (buffer_response && apdu->a_ins != VCARD7816_INS_GET_RESPONSE) {
 733         /* clear out buffer_response, return an error */
 734         vcard_set_buffer_response(card, NULL);
 735         vcard_buffer_response_delete(buffer_response);
 736         *response = vcard_make_response(VCARD7816_STATUS_EXC_ERROR);
 737         return VCARD_DONE;
 738     }
 739
 740     status = vcard_process_applet_apdu(card, apdu, response);
 741     if (status != VCARD_NEXT) {
 742         return status;
 743     }
 744     switch (vcard_get_type(card)) {
 745     case VCARD_FILE_SYSTEM:
 746         return vcard7816_file_system_process_apdu(card, apdu, response);
 747     case VCARD_VM:
 748         return vcard7816_vm_process_apdu(card, apdu, response);
 749     case VCARD_DIRECT:
 750         /* if we are type direct, then the applet should handle everything */
 751         assert(!"VCARD_DIRECT: applet failure");
 752         break;
 753     }
 754     *response =
 755         vcard_make_response(VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
 756     return VCARD_DONE;
 757 }