Diff

Differences From Artifact [3db9c71bd5]:

To Artifact [e326e231e2]:


152
153
154
155
156
157
158



159
160
161
162
163
164
165


















166
167
168
169
170
171
172
....
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
....
1611
1612
1613
1614
1615
1616
1617

































































































































1618
1619
1620
1621
1622
1623
1624
....
2130
2131
2132
2133
2134
2135
2136
2137

2138

2139
2140

2141
2142

2143
2144
2145
2146
2147
2148
2149
....
2196
2197
2198
2199
2200
2201
2202








2203
2204
2205
2206
2207
2208
2209
2210















2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286







2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
....
2331
2332
2333
2334
2335
2336
2337

2338
2339
2340
2341
2342
2343
2344
....
2419
2420
2421
2422
2423
2424
2425











2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485

2486
2487
2488
2489
2490
2491
2492
....
2601
2602
2603
2604
2605
2606
2607

2608
2609
2610
2611
2612
2613
2614
....
2615
2616
2617
2618
2619
2620
2621
2622






2623
2624
2625
2626
2627
2628
2629
#define GSCIS_TAG_SERNO               0x51
#define GSCIS_TAG_ISSUE_DATE          0x52
#define GSCIS_TAG_EXPIRE_DATE         0x53
#define GSCIS_TAG_CARD_TYPE           0x54
#define GSCIS_TAG_SECURITY_CODE       0x57
#define GSCIS_TAG_CARDID_AID          0x58




/*** PKI Information - EF 7000 ***/
#define GSCIS_TAG_CERTIFICATE         0x70
#define GSCIS_TAG_CERT_ISSUE_DATE     0x71
#define GSCIS_TAG_CERT_EXPIRE_DATE    0x72

/** Applet IDs **/
#define GSCIS_AID_CCC                 0xA0, 0x00, 0x00, 0x01, 0x16, 0xDB, 0x00



















/* Maximum size of data portion of APDUs */
/** Do not set this above 250 **/
#define CACKEY_APDU_MTU               250

/* ATR If not available */
#ifndef MAX_ATR_SIZE
................................................................................
	if (le != 0x00) {
		xmit_buf[xmit_len++] = le;
	}

	/* Begin Smartcard Transaction */
	cackey_begin_transaction(slot);

	if (class == GSCIS_CLASS_ISO7816 && instruction == GSCIS_INSTR_VERIFY && p1 == 0x00 && p2 == 0x00) {
		CACKEY_DEBUG_PRINTF("Sending APDU: <<censored>>");
	} else {
		CACKEY_DEBUG_PRINTBUF("Sending APDU:", xmit_buf, xmit_len);
	}

	recv_len = sizeof(recv_buf);
	scard_xmit_ret = SCardTransmit(slot->pcsc_card, pioSendPci, xmit_buf, xmit_len, NULL, recv_buf, &recv_len);
................................................................................
	}


	CACKEY_DEBUG_PRINTF("APDU Returned an error, returning in failure");

	return(CACKEY_PCSC_E_GENERIC);
}


































































































































/*
 * SYNPOSIS
 *     ssize_t cackey_read_buffer(struct cackey_slot *slot, unsigned char *buffer, size_t count, unsigned char t_or_v, size_t initial_offset);
 *
 * ARGUMENTS
 *     struct cackey_slot *slot
................................................................................
 * NOTES
 *     ...
 *
 */
static struct cackey_pcsc_identity *cackey_read_certs(struct cackey_slot *slot, struct cackey_pcsc_identity *certs, unsigned long *count) {
	struct cackey_pcsc_identity *curr_id;
	struct cackey_tlv_entity *ccc_tlv, *ccc_curr, *app_tlv, *app_curr;
	unsigned char ccc_aid[] = {GSCIS_AID_CCC};

	unsigned char curr_aid[7];

	unsigned long outidx = 0;
	cackey_ret transaction_ret;

	int certs_resizable;
	int send_ret, select_ret;


	CACKEY_DEBUG_PRINTF("Called.");

	if (count == NULL) {
		CACKEY_DEBUG_PRINTF("count is NULL, returning in failure");

		return(NULL);
................................................................................
	} else {
		certs_resizable = 0;
	}

	/* Select the CCC Applet */
	send_ret = cackey_select_applet(slot, ccc_aid, sizeof(ccc_aid));
	if (send_ret != CACKEY_PCSC_S_OK) {








		CACKEY_DEBUG_PRINTF("Unable to select CCC Applet, returning in failure");

		/* Terminate SmartCard Transaction */
		cackey_end_transaction(slot);

		return(NULL);
	}
















	/* Read all the applets from the CCC's TLV */
	ccc_tlv = cackey_read_tlv(slot);

	/* Look for CARDURLs that coorespond to PKI applets */
	for (ccc_curr = ccc_tlv; ccc_curr; ccc_curr = ccc_curr->_next) {
		CACKEY_DEBUG_PRINTF("Found tag: %s ... ", CACKEY_DEBUG_FUNC_TAG_TO_STR(ccc_curr->tag));

		if (ccc_curr->tag != GSCIS_TAG_CARDURL) {
			CACKEY_DEBUG_PRINTF("  ... skipping it (we only care about CARDURLs)");

			continue;
		}

		if ((ccc_curr->value_cardurl->apptype & CACKEY_TLV_APP_PKI) != CACKEY_TLV_APP_PKI) {
			CACKEY_DEBUG_PRINTF("  ... skipping it (we only care about PKI applets, this applet supports: %s/%02x)", CACKEY_DEBUG_FUNC_APPTYPE_TO_STR(ccc_curr->value_cardurl->apptype), (unsigned int) ccc_curr->value_cardurl->apptype);

			continue;
		}

		CACKEY_DEBUG_PRINTBUF("RID:", ccc_curr->value_cardurl->rid, sizeof(ccc_curr->value_cardurl->rid));
		CACKEY_DEBUG_PRINTF("AppID = %s/%04lx", CACKEY_DEBUG_FUNC_OBJID_TO_STR(ccc_curr->value_cardurl->appid), (unsigned long) ccc_curr->value_cardurl->appid);
		CACKEY_DEBUG_PRINTF("ObjectID = %s/%04lx", CACKEY_DEBUG_FUNC_OBJID_TO_STR(ccc_curr->value_cardurl->objectid), (unsigned long) ccc_curr->value_cardurl->objectid);

		memcpy(curr_aid, ccc_curr->value_cardurl->rid, sizeof(ccc_curr->value_cardurl->rid));
		curr_aid[sizeof(curr_aid) - 2] = (ccc_curr->value_cardurl->appid >> 8) & 0xff;
		curr_aid[sizeof(curr_aid) - 1] = ccc_curr->value_cardurl->appid & 0xff;

		/* Select found applet ... */
		select_ret = cackey_select_applet(slot, curr_aid, sizeof(curr_aid));
		if (select_ret != CACKEY_PCSC_S_OK) {
			CACKEY_DEBUG_PRINTF("Failed to select applet, skipping processing of this object");

			continue;
		}

		/* ... and object (file) */
		select_ret = cackey_select_file(slot, ccc_curr->value_cardurl->objectid);
		if (select_ret != CACKEY_PCSC_S_OK) {
			CACKEY_DEBUG_PRINTF("Failed to select file, skipping processing of this object");

			continue;
		}

		/* Process this file's TLV looking for certificates */
		app_tlv = cackey_read_tlv(slot);

		for (app_curr = app_tlv; app_curr; app_curr = app_curr->_next) {
			CACKEY_DEBUG_PRINTF("Found tag: %s", CACKEY_DEBUG_FUNC_TAG_TO_STR(app_curr->tag));
			if (app_curr->tag != GSCIS_TAG_CERTIFICATE) {
				CACKEY_DEBUG_PRINTF("  ... skipping it (we only care about CERTIFICATEs)");

				continue;
			}

			curr_id = &certs[outidx];
			outidx++;

			memcpy(curr_id->applet, curr_aid, sizeof(curr_id->applet));
			curr_id->file = ccc_curr->value_cardurl->objectid;
			curr_id->keysize = -1;

			CACKEY_DEBUG_PRINTF("Filling curr_id->applet (%p) with %lu bytes:", curr_id->applet, (unsigned long) sizeof(curr_id->applet));
			CACKEY_DEBUG_PRINTBUF("VAL:", curr_id->applet, sizeof(curr_id->applet));

			curr_id->certificate_len = app_curr->length;

			curr_id->certificate = malloc(curr_id->certificate_len);
			memcpy(curr_id->certificate, app_curr->value, curr_id->certificate_len);

			if (outidx >= *count) {
				if (certs_resizable) {
					*count *= 2;
					certs = realloc(certs, sizeof(*certs) * (*count));
				} else {
					break;
				}







			}
		}

		cackey_free_tlv(app_tlv);

		if (outidx >= *count) {
			break;
		}
	}

	cackey_free_tlv(ccc_tlv);

	*count = outidx;

	if (certs_resizable) {
		certs = realloc(certs, sizeof(*certs) * (*count));
	}

	slot->cached_certs = cackey_copy_certs(NULL, certs, *count);
................................................................................
	unsigned char blocktype;
	cackey_ret send_ret;
	uint16_t respcode;
	ssize_t retval = 0, unpadoffset;
	size_t tmpbuflen, padlen, tmpoutbuflen;
	int free_tmpbuf = 0;
	int le;


	CACKEY_DEBUG_PRINTF("Called.");

	if (slot == NULL) {
		CACKEY_DEBUG_PRINTF("Error.  slot is NULL");

		return(-1);
................................................................................
		padlen = 0;
	}

	/* Begin transaction */
	cackey_begin_transaction(slot);

	/* Select correct applet */











	CACKEY_DEBUG_PRINTF("Selecting applet found at %p ...", identity->pcsc_identity->applet);
	cackey_select_applet(slot, identity->pcsc_identity->applet, sizeof(identity->pcsc_identity->applet));

	/* Select correct file */
	cackey_select_file(slot, identity->pcsc_identity->file);

	tmpbuf_s = tmpbuf;
	outbuf_s = outbuf;
	while (tmpbuflen) {
		if (tmpbuflen > 245) {
			bytes_to_send = 245;
			p1 = 0x80;
			le = 0x00;
		} else {
			bytes_to_send = tmpbuflen;
			p1 = 0x00;
			le = 0x00;
		}

		tmpoutbuflen = outbuflen;

		send_ret = cackey_send_apdu(slot, GSCIS_CLASS_GLOBAL_PLATFORM, GSCIS_INSTR_SIGNDECRYPT, p1, 0x00, bytes_to_send, tmpbuf, le, &respcode, outbuf, &tmpoutbuflen);
		if (send_ret != CACKEY_PCSC_S_OK) {
			CACKEY_DEBUG_PRINTF("ADPU Sending Failed -- returning in error.");

			if (free_tmpbuf) {
				if (tmpbuf_s) {
					free(tmpbuf_s);
				}
			}

			/* End transaction */
			cackey_end_transaction(slot);

			if (respcode == 0x6982) {
				CACKEY_DEBUG_PRINTF("Security status not satisified.  Returning NEEDLOGIN");

				cackey_mark_slot_reset(slot);
				slot->token_flags = CKF_LOGIN_REQUIRED;

				return(CACKEY_PCSC_E_NEEDLOGIN);
			}

			if (send_ret == CACKEY_PCSC_E_TOKENABSENT) {
				CACKEY_DEBUG_PRINTF("Token absent.  Returning TOKENABSENT");

				cackey_mark_slot_reset(slot);

				return(CACKEY_PCSC_E_TOKENABSENT);
			}

			return(-1);
		}

		tmpbuf += bytes_to_send;
		tmpbuflen -= bytes_to_send;

		outbuf += tmpoutbuflen;
		outbuflen -= tmpoutbuflen;
		retval += tmpoutbuflen;

	}

	if (free_tmpbuf) {
		if (tmpbuf_s) {
			free(tmpbuf_s);
		}
	}
................................................................................
 *
 */
static cackey_ret cackey_login(struct cackey_slot *slot, unsigned char *pin, unsigned long pin_len, int *tries_remaining_p) {
	unsigned char cac_pin[8] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
	uint16_t response_code;
	int tries_remaining;
	int send_ret;


	/* Indicate that we do not know about how many tries are remaining */
	if (tries_remaining_p) {
		*tries_remaining_p = -1;
	}

	/* Apparently, CAC PINs are *EXACTLY* 8 bytes long -- pad with 0xFF if too short */
................................................................................
	if (pin_len >= 8) {
		memcpy(cac_pin, pin, 8);
	} else {
		memcpy(cac_pin, pin, pin_len);
	}

	/* Issue PIN Verify */
	send_ret = cackey_send_apdu(slot, GSCIS_CLASS_ISO7816, GSCIS_INSTR_VERIFY, 0x00, 0x00, sizeof(cac_pin), cac_pin, 0x00, &response_code, NULL, NULL);






	if (send_ret != CACKEY_PCSC_S_OK) {
		if ((response_code & 0x63C0) == 0x63C0) {
			tries_remaining = (response_code & 0xF);

			CACKEY_DEBUG_PRINTF("PIN Verification failed, %i tries remaining", tries_remaining);

			if (tries_remaining_p) {







>
>
>







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







|







 







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







|
>

>


>


>







 







>
>
>
>
>
>
>
>
|

|
|

|
|
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
|
|

|
|
|

|
|

|
|

|
|

|
|

|
|
|

|
|
|

|
|
|
|

|
|

|
|
|
|

|
|

|
|
|
|
|
|
|

|
|

|
|

|
|
|

|
|

|

|
|

|
|
|
|
|
|
|
>
>
>
>
>
>
>



|
|
<
<
|
<
<
<
<







 







>







 







>
>
>
>
>
>
>
>
>
>
>
|
|

|
|

|
|
|
|
|
|
|
|
|
|
|
|

|

|
|
|

|
|
|
|
|

|
|

|
|

|
|

|
|

|
|

|

|
|

|
|

|
|

|
|
|
>







 







>







 







|
>
>
>
>
>
>







152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
....
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
....
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
....
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
....
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475


2476




2477
2478
2479
2480
2481
2482
2483
....
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
....
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
....
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
....
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
#define GSCIS_TAG_SERNO               0x51
#define GSCIS_TAG_ISSUE_DATE          0x52
#define GSCIS_TAG_EXPIRE_DATE         0x53
#define GSCIS_TAG_CARD_TYPE           0x54
#define GSCIS_TAG_SECURITY_CODE       0x57
#define GSCIS_TAG_CARDID_AID          0x58

/*** PIV Codes ***/
#define NISTSP800_73_3_INSTR_GET_DATA 0xCB

/*** PKI Information - EF 7000 ***/
#define GSCIS_TAG_CERTIFICATE         0x70
#define GSCIS_TAG_CERT_ISSUE_DATE     0x71
#define GSCIS_TAG_CERT_EXPIRE_DATE    0x72

/** Applet IDs **/
#define GSCIS_AID_CCC                 0xA0, 0x00, 0x00, 0x01, 0x16, 0xDB, 0x00
#define NISTSP800_73_3_PIV_AID        0xA0, 0x00, 0x00, 0x03, 0x08, 0x00, 0x00, 0x10, 0x00, 0x01, 0x00

/* PIV IDs */
/** Key Identifiers (NIST SP 800-78-3, Table 6-1 **/
#define NISTSP800_78_3_KEY_PIVAUTH   0x9A
#define NISTSP800_78_3_KEY_SIGNATURE 0x9C
#define NISTSP800_78_3_KEY_KEYMGT    0x9D
#define NISTSP800_78_3_KEY_CARDAUTH  0x9E

/** Algorithm Identifiers (NIST SP 800-78-3, Table 6-2 **/
#define NISTSP800_78_3_ALGO_RSA1024  0x06
#define NISTSP800_78_3_ALGO_RSA2048  0x07

/** Object Identifiers (NIST SP 800-73-3 Part 1, Table 2) **/
#define NISTSP800_73_3_OID_PIVAUTH   0x5F, 0xC1, 0x05
#define NISTSP800_73_3_OID_SIGNATURE 0x5F, 0xC1, 0x0A
#define NISTSP800_73_3_OID_KEYMGT    0x5F, 0xC1, 0x0B
#define NISTSP800_73_3_OID_CARDAUTH  0x5F, 0xC1, 0x01

/* Maximum size of data portion of APDUs */
/** Do not set this above 250 **/
#define CACKEY_APDU_MTU               250

/* ATR If not available */
#ifndef MAX_ATR_SIZE
................................................................................
	if (le != 0x00) {
		xmit_buf[xmit_len++] = le;
	}

	/* Begin Smartcard Transaction */
	cackey_begin_transaction(slot);

	if (class == GSCIS_CLASS_ISO7816 && instruction == GSCIS_INSTR_VERIFY && p1 == 0x00) {
		CACKEY_DEBUG_PRINTF("Sending APDU: <<censored>>");
	} else {
		CACKEY_DEBUG_PRINTBUF("Sending APDU:", xmit_buf, xmit_len);
	}

	recv_len = sizeof(recv_buf);
	scard_xmit_ret = SCardTransmit(slot->pcsc_card, pioSendPci, xmit_buf, xmit_len, NULL, recv_buf, &recv_len);
................................................................................
	}


	CACKEY_DEBUG_PRINTF("APDU Returned an error, returning in failure");

	return(CACKEY_PCSC_E_GENERIC);
}

/*
 * SYNPOSIS
 *     ssize_t cackey_get_data(struct cackey_slot *slot, unsigned char *buffer, size_t count, ....
 *
 * ARGUMENTS
 *     struct cackey_slot *slot
 *         Slot to send commands to
 *
 *     unsigned char *buffer
 *         [OUT] Buffer
 *
 *     size_t count
 *         Number of bytes to attempt to read
 *
 *     size_t initial_offset
 *         Specify the offset to begin the read from
 *
 *
 * RETURN VALUE
 *     This function returns the number of bytes actually read, or -1 on error.
 *
 * NOTES
 *     None
 *
 */
static ssize_t cackey_get_data(struct cackey_slot *slot, unsigned char *buffer, size_t count, unsigned char oid[3]) {
	unsigned char *buffer_p;
	size_t init_count;

	size_t offset = 0, max_offset, max_count, size;
	unsigned char cmd[] = {0x5C, 0x03, 0x00, 0x00, 0x00};
	uint16_t respcode;
	int send_ret;
	int idx;

	CACKEY_DEBUG_PRINTF("Called.");

	init_count = count;

	max_offset = count;
	max_count = CACKEY_APDU_MTU;

	cmd[2] = oid[0];
	cmd[3] = oid[1];
	cmd[4] = oid[2];

	send_ret = cackey_send_apdu(slot, GSCIS_CLASS_ISO7816, NISTSP800_73_3_INSTR_GET_DATA, 0x3F, 0xFF, sizeof(cmd), cmd, count, &respcode, buffer, &count);

	if (send_ret == CACKEY_PCSC_E_RETRY) {
		CACKEY_DEBUG_PRINTF("ADPU Sending failed, retrying read buffer");

		return(cackey_get_data(slot, buffer, init_count, oid));
	}

	if (send_ret != CACKEY_PCSC_S_OK) {
		if (respcode == 0x6A86) {
/* XXX TODO PIV */
		}

		CACKEY_DEBUG_PRINTF("cackey_send_apdu() failed, returning in failure");

		return(-1);
	}

	offset += count;

#ifdef CACKEY_PARANOID
#  ifdef _POSIX_SSIZE_MAX
	if (offset > _POSIX_SSIZE_MAX) {
		CACKEY_DEBUG_PRINTF("Offset exceeds maximum value, returning in failure. (max = %li, offset = %lu)", (long) _POSIX_SSIZE_MAX, (unsigned long) offset);

		return(-1);
	}
#  endif
#endif

	if (offset < 2) {
		CACKEY_DEBUG_PRINTF("APDU GET DATA returned %lu bytes, which is too short for a BER-TLV response", (unsigned long) offset);

		return(-1);
	}

	buffer_p = buffer;
	if (*buffer_p != 0x53) {
		CACKEY_DEBUG_PRINTF("APDU GET DATA did not return a BER-TLV with tag 53.  Tag = %02x", (unsigned int) *buffer_p);

		return(-1);
	}
	buffer_p++;

	if ((*buffer_p & 0x80) == 0x80) {
		size = 0;
		idx = (*buffer_p & 0x7f);

		if (((buffer_p - buffer) + idx) >= offset) {
			CACKEY_DEBUG_PRINTF("Malformed BER value -- not enough bytes available to read length");

			return(-1);
		}

		for (; idx > 0; idx--) {
			buffer_p++;
			size <<= 8;
			size |= *buffer_p;
		}
	} else {
		size = *buffer_p;
	}
	buffer_p++;

	if (((buffer_p - buffer) + size) != offset) {
		CACKEY_DEBUG_PRINTF("Entire buffer is not consumed!");

		if (((buffer_p - buffer) + size) > offset) {
			CACKEY_DEBUG_PRINTF("Encoded size is greater than the amount of data read, dropping");

			return(-1);
		}
	}

	memmove(buffer, buffer_p, size);

	CACKEY_DEBUG_PRINTBUF("GET DATA result", buffer, size);

	CACKEY_DEBUG_PRINTF("Returning in success, read %lu bytes", (unsigned long) size);

	return(size);
}

/*
 * SYNPOSIS
 *     ssize_t cackey_read_buffer(struct cackey_slot *slot, unsigned char *buffer, size_t count, unsigned char t_or_v, size_t initial_offset);
 *
 * ARGUMENTS
 *     struct cackey_slot *slot
................................................................................
 * NOTES
 *     ...
 *
 */
static struct cackey_pcsc_identity *cackey_read_certs(struct cackey_slot *slot, struct cackey_pcsc_identity *certs, unsigned long *count) {
	struct cackey_pcsc_identity *curr_id;
	struct cackey_tlv_entity *ccc_tlv, *ccc_curr, *app_tlv, *app_curr;
	unsigned char ccc_aid[] = {GSCIS_AID_CCC}, piv_aid[] = {NISTSP800_73_3_PIV_AID};
	unsigned char piv_oid_pivauth[] = {NISTSP800_73_3_OID_PIVAUTH};
	unsigned char curr_aid[7];
	unsigned char buffer[8192];
	unsigned long outidx = 0;
	cackey_ret transaction_ret;
	ssize_t read_ret;
	int certs_resizable;
	int send_ret, select_ret;
	int piv = 0;

	CACKEY_DEBUG_PRINTF("Called.");

	if (count == NULL) {
		CACKEY_DEBUG_PRINTF("count is NULL, returning in failure");

		return(NULL);
................................................................................
	} else {
		certs_resizable = 0;
	}

	/* Select the CCC Applet */
	send_ret = cackey_select_applet(slot, ccc_aid, sizeof(ccc_aid));
	if (send_ret != CACKEY_PCSC_S_OK) {
		/* Try PIV application */
		send_ret = cackey_select_applet(slot, piv_aid, sizeof(piv_aid));
		if (send_ret == CACKEY_PCSC_S_OK) {
			CACKEY_DEBUG_PRINTF("We have a PIV card, doing the needful");

			piv = 1;
		} else {

			CACKEY_DEBUG_PRINTF("Unable to select CCC Applet, returning in failure");

			/* Terminate SmartCard Transaction */
			cackey_end_transaction(slot);

			return(NULL);
		}
	}

	if (piv) {
		read_ret = cackey_get_data(slot, buffer, sizeof(buffer), piv_oid_pivauth);

		curr_id = &certs[outidx];
		outidx++;

		curr_id->keysize = -1;
		curr_id->file = 0xFFFF;
		curr_id->applet[0] = NISTSP800_78_3_KEY_PIVAUTH;

		curr_id->certificate_len = read_ret;
		curr_id->certificate = malloc(curr_id->certificate_len);
		memcpy(curr_id->certificate, buffer + 4, curr_id->certificate_len - 4); /* XXX TODO PIV */
	} else {
		/* Read all the applets from the CCC's TLV */
		ccc_tlv = cackey_read_tlv(slot);

		/* Look for CARDURLs that coorespond to PKI applets */
		for (ccc_curr = ccc_tlv; ccc_curr; ccc_curr = ccc_curr->_next) {
			CACKEY_DEBUG_PRINTF("Found tag: %s ... ", CACKEY_DEBUG_FUNC_TAG_TO_STR(ccc_curr->tag));

			if (ccc_curr->tag != GSCIS_TAG_CARDURL) {
				CACKEY_DEBUG_PRINTF("  ... skipping it (we only care about CARDURLs)");

				continue;
			}

			if ((ccc_curr->value_cardurl->apptype & CACKEY_TLV_APP_PKI) != CACKEY_TLV_APP_PKI) {
				CACKEY_DEBUG_PRINTF("  ... skipping it (we only care about PKI applets, this applet supports: %s/%02x)", CACKEY_DEBUG_FUNC_APPTYPE_TO_STR(ccc_curr->value_cardurl->apptype), (unsigned int) ccc_curr->value_cardurl->apptype);

				continue;
			}

			CACKEY_DEBUG_PRINTBUF("RID:", ccc_curr->value_cardurl->rid, sizeof(ccc_curr->value_cardurl->rid));
			CACKEY_DEBUG_PRINTF("AppID = %s/%04lx", CACKEY_DEBUG_FUNC_OBJID_TO_STR(ccc_curr->value_cardurl->appid), (unsigned long) ccc_curr->value_cardurl->appid);
			CACKEY_DEBUG_PRINTF("ObjectID = %s/%04lx", CACKEY_DEBUG_FUNC_OBJID_TO_STR(ccc_curr->value_cardurl->objectid), (unsigned long) ccc_curr->value_cardurl->objectid);

			memcpy(curr_aid, ccc_curr->value_cardurl->rid, sizeof(ccc_curr->value_cardurl->rid));
			curr_aid[sizeof(curr_aid) - 2] = (ccc_curr->value_cardurl->appid >> 8) & 0xff;
			curr_aid[sizeof(curr_aid) - 1] = ccc_curr->value_cardurl->appid & 0xff;

			/* Select found applet ... */
			select_ret = cackey_select_applet(slot, curr_aid, sizeof(curr_aid));
			if (select_ret != CACKEY_PCSC_S_OK) {
				CACKEY_DEBUG_PRINTF("Failed to select applet, skipping processing of this object");

				continue;
			}

			/* ... and object (file) */
			select_ret = cackey_select_file(slot, ccc_curr->value_cardurl->objectid);
			if (select_ret != CACKEY_PCSC_S_OK) {
				CACKEY_DEBUG_PRINTF("Failed to select file, skipping processing of this object");

				continue;
			}

			/* Process this file's TLV looking for certificates */
			app_tlv = cackey_read_tlv(slot);
	
			for (app_curr = app_tlv; app_curr; app_curr = app_curr->_next) {
				CACKEY_DEBUG_PRINTF("Found tag: %s", CACKEY_DEBUG_FUNC_TAG_TO_STR(app_curr->tag));
				if (app_curr->tag != GSCIS_TAG_CERTIFICATE) {
					CACKEY_DEBUG_PRINTF("  ... skipping it (we only care about CERTIFICATEs)");

					continue;
				}

				curr_id = &certs[outidx];
				outidx++;

				memcpy(curr_id->applet, curr_aid, sizeof(curr_id->applet));
				curr_id->file = ccc_curr->value_cardurl->objectid;
				curr_id->keysize = -1;

				CACKEY_DEBUG_PRINTF("Filling curr_id->applet (%p) with %lu bytes:", curr_id->applet, (unsigned long) sizeof(curr_id->applet));
				CACKEY_DEBUG_PRINTBUF("VAL:", curr_id->applet, sizeof(curr_id->applet));

				curr_id->certificate_len = app_curr->length;

				curr_id->certificate = malloc(curr_id->certificate_len);
				memcpy(curr_id->certificate, app_curr->value, curr_id->certificate_len);

				if (outidx >= *count) {
					if (certs_resizable) {
						*count *= 2;
						certs = realloc(certs, sizeof(*certs) * (*count));
					} else {
						break;
					}
				}
			}

			cackey_free_tlv(app_tlv);

			if (outidx >= *count) {
				break;
			}
		}

		cackey_free_tlv(ccc_tlv);
	}







	*count = outidx;

	if (certs_resizable) {
		certs = realloc(certs, sizeof(*certs) * (*count));
	}

	slot->cached_certs = cackey_copy_certs(NULL, certs, *count);
................................................................................
	unsigned char blocktype;
	cackey_ret send_ret;
	uint16_t respcode;
	ssize_t retval = 0, unpadoffset;
	size_t tmpbuflen, padlen, tmpoutbuflen;
	int free_tmpbuf = 0;
	int le;
	int piv;

	CACKEY_DEBUG_PRINTF("Called.");

	if (slot == NULL) {
		CACKEY_DEBUG_PRINTF("Error.  slot is NULL");

		return(-1);
................................................................................
		padlen = 0;
	}

	/* Begin transaction */
	cackey_begin_transaction(slot);

	/* Select correct applet */
	if (identity->pcsc_identity->file == 0xFFFF) {
		piv = 1;
	} else {
		piv = 0;
	}

	if (piv) {
		CACKEY_DEBUG_PRINTF("Sign/Decrypt not implemented XXX TODO PIV");
		cackey_end_transaction(slot);
		return(-1);
	} else {
		CACKEY_DEBUG_PRINTF("Selecting applet found at %p ...", identity->pcsc_identity->applet);
		cackey_select_applet(slot, identity->pcsc_identity->applet, sizeof(identity->pcsc_identity->applet));

		/* Select correct file */
		cackey_select_file(slot, identity->pcsc_identity->file);

		tmpbuf_s = tmpbuf;
		outbuf_s = outbuf;
		while (tmpbuflen) {
			if (tmpbuflen > 245) {
				bytes_to_send = 245;
				p1 = 0x80;
				le = 0x00;
			} else {
				bytes_to_send = tmpbuflen;
				p1 = 0x00;
				le = 0x00;
			}

			tmpoutbuflen = outbuflen;

			send_ret = cackey_send_apdu(slot, GSCIS_CLASS_GLOBAL_PLATFORM, GSCIS_INSTR_SIGNDECRYPT, p1, 0x00, bytes_to_send, tmpbuf, le, &respcode, outbuf, &tmpoutbuflen);
			if (send_ret != CACKEY_PCSC_S_OK) {
				CACKEY_DEBUG_PRINTF("ADPU Sending Failed -- returning in error.");

				if (free_tmpbuf) {
					if (tmpbuf_s) {
						free(tmpbuf_s);
					}
				}

				/* End transaction */
				cackey_end_transaction(slot);

				if (respcode == 0x6982) {
					CACKEY_DEBUG_PRINTF("Security status not satisified.  Returning NEEDLOGIN");

					cackey_mark_slot_reset(slot);
					slot->token_flags = CKF_LOGIN_REQUIRED;

					return(CACKEY_PCSC_E_NEEDLOGIN);
				}

				if (send_ret == CACKEY_PCSC_E_TOKENABSENT) {
					CACKEY_DEBUG_PRINTF("Token absent.  Returning TOKENABSENT");

					cackey_mark_slot_reset(slot);

					return(CACKEY_PCSC_E_TOKENABSENT);
				}

				return(-1);
			}

			tmpbuf += bytes_to_send;
			tmpbuflen -= bytes_to_send;

			outbuf += tmpoutbuflen;
			outbuflen -= tmpoutbuflen;
			retval += tmpoutbuflen;
		}
	}

	if (free_tmpbuf) {
		if (tmpbuf_s) {
			free(tmpbuf_s);
		}
	}
................................................................................
 *
 */
static cackey_ret cackey_login(struct cackey_slot *slot, unsigned char *pin, unsigned long pin_len, int *tries_remaining_p) {
	unsigned char cac_pin[8] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
	uint16_t response_code;
	int tries_remaining;
	int send_ret;
	int key_reference = 0x00;

	/* Indicate that we do not know about how many tries are remaining */
	if (tries_remaining_p) {
		*tries_remaining_p = -1;
	}

	/* Apparently, CAC PINs are *EXACTLY* 8 bytes long -- pad with 0xFF if too short */
................................................................................
	if (pin_len >= 8) {
		memcpy(cac_pin, pin, 8);
	} else {
		memcpy(cac_pin, pin, pin_len);
	}

	/* Issue PIN Verify */
	send_ret = cackey_send_apdu(slot, GSCIS_CLASS_ISO7816, GSCIS_INSTR_VERIFY, 0x00, key_reference, sizeof(cac_pin), cac_pin, 0x00, &response_code, NULL, NULL);
	if (send_ret != CACKEY_PCSC_S_OK && response_code == 0x6A88) {
		key_reference = 0x80;

		send_ret = cackey_send_apdu(slot, GSCIS_CLASS_ISO7816, GSCIS_INSTR_VERIFY, 0x00, key_reference, sizeof(cac_pin), cac_pin, 0x00, &response_code, NULL, NULL);
	}

	if (send_ret != CACKEY_PCSC_S_OK) {
		if ((response_code & 0x63C0) == 0x63C0) {
			tries_remaining = (response_code & 0xF);

			CACKEY_DEBUG_PRINTF("PIN Verification failed, %i tries remaining", tries_remaining);

			if (tries_remaining_p) {