#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
#define NISTSP800_73_3_INSTR_GENAUTH  0x87

/*** 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 **/

 *     cackey_pcsc_connect() if needed.
 *
 *     It will connect to the card in the reader attached to the slot
 *     specified.  It will reconnect to the card if the connection
 *     goes away.
 *
 */
static cackey_ret cackey_send_apdu(struct cackey_slot *slot, unsigned char class, unsigned char instruction, unsigned char p1, unsigned char p2, unsigned int lc, unsigned char *data, unsigned int le, uint16_t *respcode, unsigned char *respdata, size_t *respdata_len) {
	uint8_t major_rc, minor_rc;
	size_t bytes_to_copy, tmp_respdata_len;
	LPCSCARD_IO_REQUEST pioSendPci;
	DWORD protocol;
	DWORD xmit_len, recv_len;
	LONG scard_xmit_ret, scard_reconn_ret;
	BYTE xmit_buf[1024], recv_buf[1024];

	/* Transmit */
	xmit_len = 0;
	xmit_buf[xmit_len++] = class;
	xmit_buf[xmit_len++] = instruction;
	xmit_buf[xmit_len++] = p1;
	xmit_buf[xmit_len++] = p2;
	if (data) {
		if (lc > 256) {
			xmit_buf[xmit_len++] = 0x80; /* XXX UNTESTED */
			xmit_buf[xmit_len++] = (lc & 0xff00) >> 8;
			xmit_buf[xmit_len++] = lc & 0xff;
		} else {
			xmit_buf[xmit_len++] = lc;
		}
		for (idx = 0; idx < lc; idx++) {
			xmit_buf[xmit_len++] = data[idx];
		}
	}

	if (le != 0x00) {
		if (le > 256) {
			xmit_buf[xmit_len++] = 0x80; /* XXX UNTESTED */
			xmit_buf[xmit_len++] = (le & 0xff00) >> 8;
			xmit_buf[xmit_len++] = le & 0xff;
		} else if (le == 256) {
			xmit_buf[xmit_len++] = 0x00;
		} else {
			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>>");

 *     ...
 *
 */
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, piv_oid_pivauth[] = {NISTSP800_73_3_OID_PIVAUTH}, piv_oid_signature[] = {NISTSP800_73_3_OID_SIGNATURE}, piv_oid_keymgt[] = {NISTSP800_73_3_OID_KEYMGT};
	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_key, piv = 0;
	int idx;

	CACKEY_DEBUG_PRINTF("Called.");

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

		return(NULL);

			cackey_end_transaction(slot);

			return(NULL);
		}
	}

	if (piv) {
		for (idx = 0; idx < 3; idx++) {
			switch (idx) {
				case 0:
					piv_oid = piv_oid_pivauth;
					piv_key = NISTSP800_78_3_KEY_PIVAUTH;
					break;
				case 1:
					piv_oid = piv_oid_signature;
					piv_key = NISTSP800_78_3_KEY_SIGNATURE;
					break;
				case 2:
					piv_oid = piv_oid_keymgt;
					piv_key = NISTSP800_78_3_KEY_KEYMGT;
					break;
			}

			read_ret = cackey_get_data(slot, buffer, sizeof(buffer), piv_oid);

			if (read_ret <= 0) {
				continue;
			}

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

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

			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 (-4 header, -5 trailer == why ?) */
			curr_id->certificate_len -= 4;
			curr_id->certificate_len -= 5;
		}
	} 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));

 *     ...
 *
 * NOTES
 *     ...
 *
 */
static ssize_t cackey_signdecrypt(struct cackey_slot *slot, struct cackey_identity *identity, unsigned char *buf, size_t buflen, unsigned char *outbuf, size_t outbuflen, int padInput, int unpadOutput) {
	unsigned char dyn_auth_template[10];
	unsigned char *tmpbuf, *tmpbuf_s, *outbuf_s;
	unsigned char bytes_to_send, p1, class;
	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;

		free_tmpbuf = 0;
		padlen = 0;
	}

	/* Begin transaction */
	cackey_begin_transaction(slot);

	/* Determine type of transaction */
	if (identity->pcsc_identity->file == 0xFFFF) {
		piv = 1;
	} else {
		piv = 0;
	}

	/* Select correct applet */
	if (!piv) {




		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);
	} else {
		dyn_auth_template[0] = 0x7C;
		dyn_auth_template[1] = 0x82;
		dyn_auth_template[2] = ((tmpbuflen + 6) & 0xff00) >> 8;
		dyn_auth_template[3] = (tmpbuflen + 6) & 0x00ff;
		dyn_auth_template[4] = 0x82;
		dyn_auth_template[5] = 0x00;
		dyn_auth_template[6] = 0x81;
		dyn_auth_template[7] = 0x82;
		dyn_auth_template[8] = (tmpbuflen & 0xff00) >> 8;
		dyn_auth_template[9] = tmpbuflen & 0x00ff;

		send_ret = cackey_send_apdu(slot, 0x10, NISTSP800_73_3_INSTR_GENAUTH, NISTSP800_78_3_ALGO_RSA2048, identity->pcsc_identity->applet[0], sizeof(dyn_auth_template), dyn_auth_template, 0x00, NULL, NULL, NULL);
	}

	tmpbuf_s = tmpbuf;
	outbuf_s = outbuf;
	while (tmpbuflen) {
		if (tmpbuflen > 245) {
			bytes_to_send = 245;
			if (piv) {
				class = 0x10;
				le = 0x00;
			} else {
				p1 = 0x80;
				le = 0x00;
			}
		} else {
			bytes_to_send = tmpbuflen;
			if (piv) {
				class = GSCIS_CLASS_ISO7816;
				le = 256;
			} else {
				p1 = 0x00;
				le = 0x00;
			}
		}

		tmpoutbuflen = outbuflen;

		if (piv) {
			send_ret = cackey_send_apdu(slot, class, NISTSP800_73_3_INSTR_GENAUTH, NISTSP800_78_3_ALGO_RSA2048, identity->pcsc_identity->applet[0], bytes_to_send, tmpbuf, le, &respcode, outbuf, &tmpoutbuflen);
		} else {
			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);
		}
	}

	if (outbuflen > _POSIX_SSIZE_MAX) {
		CACKEY_DEBUG_PRINTF("Outbuflen exceeds maximum value, returning in failure. (max = %li, outbuflen = %lu)", (long) _POSIX_SSIZE_MAX, (unsigned long) outbuflen);

		return(-1);
	}
#  endif
#endif

	/* We must remove the "7C" tag to get to the signature */
	if (piv) {
		if (outbuf[0] != 0x7C) {
			CACKEY_DEBUG_PRINTF("Response from PIV for GENERATE AUTHENTICATION was not a 0x7C tag, returning in failure");


			return(-1);
		}

		/* XXX TODO PIV */
		memmove(outbuf, outbuf + 8, retval - 8);
		retval -= 8;
	}

	/* Unpad reply */
	if (unpadOutput) {
		if (retval < 3) {
			CACKEY_DEBUG_PRINTF("Reply is too small, we are not able to unpad -- passing back and hoping for the best!");

			CACKEY_DEBUG_PRINTF("Returning in success, retval = %li (bytes)", (long) retval);