Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 1 | /* |
| 2 | * implement the applets for the CAC card. |
| 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 "qemu-common.h" |
| 9 | |
| 10 | #include "cac.h" |
| 11 | #include "vcard.h" |
| 12 | #include "vcard_emul.h" |
| 13 | #include "card_7816.h" |
| 14 | |
| 15 | #define CAC_GET_PROPERTIES 0x56 |
| 16 | #define CAC_GET_ACR 0x4c |
| 17 | #define CAC_READ_BUFFER 0x52 |
| 18 | #define CAC_UPDATE_BUFFER 0x58 |
| 19 | #define CAC_SIGN_DECRYPT 0x42 |
| 20 | #define CAC_GET_CERTIFICATE 0x36 |
| 21 | |
| 22 | /* private data for PKI applets */ |
| 23 | typedef struct CACPKIAppletDataStruct { |
| 24 | unsigned char *cert; |
| 25 | int cert_len; |
| 26 | unsigned char *cert_buffer; |
| 27 | int cert_buffer_len; |
| 28 | unsigned char *sign_buffer; |
| 29 | int sign_buffer_len; |
| 30 | VCardKey *key; |
| 31 | } CACPKIAppletData; |
| 32 | |
| 33 | /* |
| 34 | * CAC applet private data |
| 35 | */ |
| 36 | struct VCardAppletPrivateStruct { |
| 37 | union { |
| 38 | CACPKIAppletData pki_data; |
| 39 | void *reserved; |
| 40 | } u; |
| 41 | }; |
| 42 | |
| 43 | /* |
| 44 | * handle all the APDU's that are common to all CAC applets |
| 45 | */ |
| 46 | static VCardStatus |
| 47 | cac_common_process_apdu(VCard *card, VCardAPDU *apdu, VCardResponse **response) |
| 48 | { |
| 49 | int ef; |
| 50 | |
| 51 | switch (apdu->a_ins) { |
| 52 | case VCARD7816_INS_SELECT_FILE: |
| 53 | if (apdu->a_p1 != 0x02) { |
| 54 | /* let the 7816 code handle applet switches */ |
| 55 | return VCARD_NEXT; |
| 56 | } |
| 57 | /* handle file id setting */ |
| 58 | if (apdu->a_Lc != 2) { |
| 59 | *response = vcard_make_response( |
| 60 | VCARD7816_STATUS_ERROR_DATA_INVALID); |
| 61 | return VCARD_DONE; |
| 62 | } |
| 63 | /* CAC 1.0 only supports ef = 0 */ |
| 64 | ef = apdu->a_body[0] | (apdu->a_body[1] << 8); |
| 65 | if (ef != 0) { |
| 66 | *response = vcard_make_response( |
| 67 | VCARD7816_STATUS_ERROR_FILE_NOT_FOUND); |
| 68 | return VCARD_DONE; |
| 69 | } |
| 70 | *response = vcard_make_response(VCARD7816_STATUS_SUCCESS); |
| 71 | return VCARD_DONE; |
| 72 | case VCARD7816_INS_GET_RESPONSE: |
| 73 | case VCARD7816_INS_VERIFY: |
| 74 | /* let the 7816 code handle these */ |
| 75 | return VCARD_NEXT; |
| 76 | case CAC_GET_PROPERTIES: |
| 77 | case CAC_GET_ACR: |
| 78 | /* skip these for now, this will probably be needed */ |
| 79 | *response = vcard_make_response(VCARD7816_STATUS_ERROR_P1_P2_INCORRECT); |
| 80 | return VCARD_DONE; |
| 81 | } |
| 82 | *response = vcard_make_response( |
| 83 | VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED); |
| 84 | return VCARD_DONE; |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | * reset the inter call state between applet selects |
| 89 | */ |
| 90 | static VCardStatus |
| 91 | cac_applet_pki_reset(VCard *card, int channel) |
| 92 | { |
| 93 | VCardAppletPrivate *applet_private = NULL; |
| 94 | CACPKIAppletData *pki_applet = NULL; |
| 95 | applet_private = vcard_get_current_applet_private(card, channel); |
| 96 | assert(applet_private); |
| 97 | pki_applet = &(applet_private->u.pki_data); |
| 98 | |
| 99 | pki_applet->cert_buffer = NULL; |
| 100 | if (pki_applet->sign_buffer) { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 101 | g_free(pki_applet->sign_buffer); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 102 | pki_applet->sign_buffer = NULL; |
| 103 | } |
| 104 | pki_applet->cert_buffer_len = 0; |
| 105 | pki_applet->sign_buffer_len = 0; |
| 106 | return VCARD_DONE; |
| 107 | } |
| 108 | |
| 109 | static VCardStatus |
| 110 | cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu, |
| 111 | VCardResponse **response) |
| 112 | { |
| 113 | CACPKIAppletData *pki_applet = NULL; |
| 114 | VCardAppletPrivate *applet_private = NULL; |
| 115 | int size, next; |
| 116 | unsigned char *sign_buffer; |
| 117 | vcard_7816_status_t status; |
| 118 | |
| 119 | applet_private = vcard_get_current_applet_private(card, apdu->a_channel); |
| 120 | assert(applet_private); |
| 121 | pki_applet = &(applet_private->u.pki_data); |
| 122 | |
| 123 | switch (apdu->a_ins) { |
| 124 | case CAC_UPDATE_BUFFER: |
| 125 | *response = vcard_make_response( |
| 126 | VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED); |
| 127 | return VCARD_DONE; |
| 128 | case CAC_GET_CERTIFICATE: |
| 129 | if ((apdu->a_p2 != 0) || (apdu->a_p1 != 0)) { |
| 130 | *response = vcard_make_response( |
| 131 | VCARD7816_STATUS_ERROR_P1_P2_INCORRECT); |
| 132 | break; |
| 133 | } |
| 134 | assert(pki_applet->cert != NULL); |
| 135 | size = apdu->a_Le; |
| 136 | if (pki_applet->cert_buffer == NULL) { |
| 137 | pki_applet->cert_buffer = pki_applet->cert; |
| 138 | pki_applet->cert_buffer_len = pki_applet->cert_len; |
| 139 | } |
| 140 | size = MIN(size, pki_applet->cert_buffer_len); |
| 141 | next = MIN(255, pki_applet->cert_buffer_len - size); |
| 142 | *response = vcard_response_new_bytes( |
| 143 | card, pki_applet->cert_buffer, size, |
| 144 | apdu->a_Le, next ? |
| 145 | VCARD7816_SW1_WARNING_CHANGE : |
| 146 | VCARD7816_SW1_SUCCESS, |
| 147 | next); |
| 148 | pki_applet->cert_buffer += size; |
| 149 | pki_applet->cert_buffer_len -= size; |
| 150 | if ((*response == NULL) || (next == 0)) { |
| 151 | pki_applet->cert_buffer = NULL; |
| 152 | } |
| 153 | if (*response == NULL) { |
| 154 | *response = vcard_make_response( |
| 155 | VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE); |
| 156 | } |
| 157 | return VCARD_DONE; |
| 158 | case CAC_SIGN_DECRYPT: |
| 159 | if (apdu->a_p2 != 0) { |
| 160 | *response = vcard_make_response( |
| 161 | VCARD7816_STATUS_ERROR_P1_P2_INCORRECT); |
| 162 | break; |
| 163 | } |
| 164 | size = apdu->a_Lc; |
| 165 | |
| 166 | sign_buffer = realloc(pki_applet->sign_buffer, |
| 167 | pki_applet->sign_buffer_len+size); |
| 168 | if (sign_buffer == NULL) { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 169 | g_free(pki_applet->sign_buffer); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 170 | pki_applet->sign_buffer = NULL; |
| 171 | pki_applet->sign_buffer_len = 0; |
| 172 | *response = vcard_make_response( |
| 173 | VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE); |
| 174 | return VCARD_DONE; |
| 175 | } |
| 176 | memcpy(sign_buffer+pki_applet->sign_buffer_len, apdu->a_body, size); |
| 177 | size += pki_applet->sign_buffer_len; |
| 178 | switch (apdu->a_p1) { |
| 179 | case 0x80: |
| 180 | /* p1 == 0x80 means we haven't yet sent the whole buffer, wait for |
| 181 | * the rest */ |
| 182 | pki_applet->sign_buffer = sign_buffer; |
| 183 | pki_applet->sign_buffer_len = size; |
| 184 | *response = vcard_make_response(VCARD7816_STATUS_SUCCESS); |
| 185 | return VCARD_DONE; |
| 186 | case 0x00: |
| 187 | /* we now have the whole buffer, do the operation, result will be |
| 188 | * in the sign_buffer */ |
| 189 | status = vcard_emul_rsa_op(card, pki_applet->key, |
| 190 | sign_buffer, size); |
| 191 | if (status != VCARD7816_STATUS_SUCCESS) { |
| 192 | *response = vcard_make_response(status); |
| 193 | break; |
| 194 | } |
| 195 | *response = vcard_response_new(card, sign_buffer, size, apdu->a_Le, |
| 196 | VCARD7816_STATUS_SUCCESS); |
| 197 | if (*response == NULL) { |
| 198 | *response = vcard_make_response( |
| 199 | VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE); |
| 200 | } |
| 201 | break; |
| 202 | default: |
| 203 | *response = vcard_make_response( |
| 204 | VCARD7816_STATUS_ERROR_P1_P2_INCORRECT); |
| 205 | break; |
| 206 | } |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 207 | g_free(sign_buffer); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 208 | pki_applet->sign_buffer = NULL; |
| 209 | pki_applet->sign_buffer_len = 0; |
| 210 | return VCARD_DONE; |
| 211 | case CAC_READ_BUFFER: |
| 212 | /* new CAC call, go ahead and use the old version for now */ |
| 213 | /* TODO: implement */ |
| 214 | *response = vcard_make_response( |
| 215 | VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED); |
| 216 | return VCARD_DONE; |
| 217 | } |
| 218 | return cac_common_process_apdu(card, apdu, response); |
| 219 | } |
| 220 | |
| 221 | |
| 222 | static VCardStatus |
| 223 | cac_applet_id_process_apdu(VCard *card, VCardAPDU *apdu, |
| 224 | VCardResponse **response) |
| 225 | { |
| 226 | switch (apdu->a_ins) { |
| 227 | case CAC_UPDATE_BUFFER: |
| 228 | *response = vcard_make_response( |
| 229 | VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED); |
| 230 | return VCARD_DONE; |
| 231 | case CAC_READ_BUFFER: |
| 232 | /* new CAC call, go ahead and use the old version for now */ |
| 233 | /* TODO: implement */ |
| 234 | *response = vcard_make_response( |
| 235 | VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED); |
| 236 | return VCARD_DONE; |
| 237 | } |
| 238 | return cac_common_process_apdu(card, apdu, response); |
| 239 | } |
| 240 | |
| 241 | |
| 242 | /* |
| 243 | * TODO: if we ever want to support general CAC middleware, we will need to |
| 244 | * implement the various containers. |
| 245 | */ |
| 246 | static VCardStatus |
| 247 | cac_applet_container_process_apdu(VCard *card, VCardAPDU *apdu, |
| 248 | VCardResponse **response) |
| 249 | { |
| 250 | switch (apdu->a_ins) { |
| 251 | case CAC_READ_BUFFER: |
| 252 | case CAC_UPDATE_BUFFER: |
| 253 | *response = vcard_make_response( |
| 254 | VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED); |
| 255 | return VCARD_DONE; |
| 256 | default: |
| 257 | break; |
| 258 | } |
| 259 | return cac_common_process_apdu(card, apdu, response); |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * utilities for creating and destroying the private applet data |
| 264 | */ |
| 265 | static void |
| 266 | cac_delete_pki_applet_private(VCardAppletPrivate *applet_private) |
| 267 | { |
| 268 | CACPKIAppletData *pki_applet_data = NULL; |
| 269 | if (pki_applet_data == NULL) { |
| 270 | return; |
| 271 | } |
| 272 | pki_applet_data = &(applet_private->u.pki_data); |
| 273 | if (pki_applet_data->cert != NULL) { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 274 | g_free(pki_applet_data->cert); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 275 | } |
| 276 | if (pki_applet_data->sign_buffer != NULL) { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 277 | g_free(pki_applet_data->sign_buffer); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 278 | } |
| 279 | if (pki_applet_data->key != NULL) { |
| 280 | vcard_emul_delete_key(pki_applet_data->key); |
| 281 | } |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 282 | g_free(applet_private); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | static VCardAppletPrivate * |
| 286 | cac_new_pki_applet_private(const unsigned char *cert, |
| 287 | int cert_len, VCardKey *key) |
| 288 | { |
| 289 | CACPKIAppletData *pki_applet_data = NULL; |
| 290 | VCardAppletPrivate *applet_private = NULL; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 291 | applet_private = (VCardAppletPrivate *)g_malloc(sizeof(VCardAppletPrivate)); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 292 | |
| 293 | pki_applet_data = &(applet_private->u.pki_data); |
| 294 | pki_applet_data->cert_buffer = NULL; |
| 295 | pki_applet_data->cert_buffer_len = 0; |
| 296 | pki_applet_data->sign_buffer = NULL; |
| 297 | pki_applet_data->sign_buffer_len = 0; |
| 298 | pki_applet_data->key = NULL; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 299 | pki_applet_data->cert = (unsigned char *)g_malloc(cert_len+1); |
Robert Relyea | 111a38b | 2010-11-28 16:36:38 +0200 | [diff] [blame] | 300 | /* |
| 301 | * if we want to support compression, then we simply change the 0 to a 1 |
| 302 | * and compress the cert data with libz |
| 303 | */ |
| 304 | pki_applet_data->cert[0] = 0; /* not compressed */ |
| 305 | memcpy(&pki_applet_data->cert[1], cert, cert_len); |
| 306 | pki_applet_data->cert_len = cert_len+1; |
| 307 | |
| 308 | pki_applet_data->key = key; |
| 309 | return applet_private; |
| 310 | } |
| 311 | |
| 312 | |
| 313 | /* |
| 314 | * create a new cac applet which links to a given cert |
| 315 | */ |
| 316 | static VCardApplet * |
| 317 | cac_new_pki_applet(int i, const unsigned char *cert, |
| 318 | int cert_len, VCardKey *key) |
| 319 | { |
| 320 | VCardAppletPrivate *applet_private = NULL; |
| 321 | VCardApplet *applet = NULL; |
| 322 | unsigned char pki_aid[] = { 0xa0, 0x00, 0x00, 0x00, 0x79, 0x01, 0x00 }; |
| 323 | int pki_aid_len = sizeof(pki_aid); |
| 324 | |
| 325 | pki_aid[pki_aid_len-1] = i; |
| 326 | |
| 327 | applet_private = cac_new_pki_applet_private(cert, cert_len, key); |
| 328 | if (applet_private == NULL) { |
| 329 | goto failure; |
| 330 | } |
| 331 | applet = vcard_new_applet(cac_applet_pki_process_apdu, cac_applet_pki_reset, |
| 332 | pki_aid, pki_aid_len); |
| 333 | if (applet == NULL) { |
| 334 | goto failure; |
| 335 | } |
| 336 | vcard_set_applet_private(applet, applet_private, |
| 337 | cac_delete_pki_applet_private); |
| 338 | applet_private = NULL; |
| 339 | |
| 340 | return applet; |
| 341 | |
| 342 | failure: |
| 343 | if (applet_private != NULL) { |
| 344 | cac_delete_pki_applet_private(applet_private); |
| 345 | } |
| 346 | return NULL; |
| 347 | } |
| 348 | |
| 349 | |
| 350 | static unsigned char cac_default_container_aid[] = { |
| 351 | 0xa0, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00 }; |
| 352 | static unsigned char cac_id_aid[] = { |
| 353 | 0xa0, 0x00, 0x00, 0x00, 0x79, 0x03, 0x00 }; |
| 354 | /* |
| 355 | * Initialize the cac card. This is the only public function in this file. All |
| 356 | * the rest are connected through function pointers. |
| 357 | */ |
| 358 | VCardStatus |
| 359 | cac_card_init(VReader *reader, VCard *card, |
| 360 | const char *params, |
| 361 | unsigned char * const *cert, |
| 362 | int cert_len[], |
| 363 | VCardKey *key[] /* adopt the keys*/, |
| 364 | int cert_count) |
| 365 | { |
| 366 | int i; |
| 367 | VCardApplet *applet; |
| 368 | |
| 369 | /* CAC Cards are VM Cards */ |
| 370 | vcard_set_type(card, VCARD_VM); |
| 371 | |
| 372 | /* create one PKI applet for each cert */ |
| 373 | for (i = 0; i < cert_count; i++) { |
| 374 | applet = cac_new_pki_applet(i, cert[i], cert_len[i], key[i]); |
| 375 | if (applet == NULL) { |
| 376 | goto failure; |
| 377 | } |
| 378 | vcard_add_applet(card, applet); |
| 379 | } |
| 380 | |
| 381 | /* create a default blank container applet */ |
| 382 | applet = vcard_new_applet(cac_applet_container_process_apdu, |
| 383 | NULL, cac_default_container_aid, |
| 384 | sizeof(cac_default_container_aid)); |
| 385 | if (applet == NULL) { |
| 386 | goto failure; |
| 387 | } |
| 388 | vcard_add_applet(card, applet); |
| 389 | |
| 390 | /* create a default blank container applet */ |
| 391 | applet = vcard_new_applet(cac_applet_id_process_apdu, |
| 392 | NULL, cac_id_aid, |
| 393 | sizeof(cac_id_aid)); |
| 394 | if (applet == NULL) { |
| 395 | goto failure; |
| 396 | } |
| 397 | vcard_add_applet(card, applet); |
| 398 | return VCARD_DONE; |
| 399 | |
| 400 | failure: |
| 401 | return VCARD_FAIL; |
| 402 | } |
| 403 | |