[mirror_qemu.git] / hw / usb / ccid-card-passthru.c

/*
 * CCID Passthru Card Device emulation
 *
 * Copyright (c) 2011 Red Hat.
 * Written by Alon Levy.
 *
 * This work is licensed under the terms of the GNU GPL, version 2.1 or later.
 * See the COPYING file in the top-level directory.
 */

#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/units.h"
#include <libcacard.h>
#include "chardev/char-fe.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
#include "qemu/sockets.h"
#include "ccid.h"
#include "qapi/error.h"

#define DPRINTF(card, lvl, fmt, ...)                    \
do {                                                    \
    if (lvl <= card->debug) {                           \
        printf("ccid-card-passthru: " fmt , ## __VA_ARGS__);     \
    }                                                   \
} while (0)

#define D_WARN 1
#define D_INFO 2
#define D_MORE_INFO 3
#define D_VERBOSE 4

/* TODO: do we still need this? */
static const uint8_t DEFAULT_ATR[] = {
/*
 * From some example somewhere
 * 0x3B, 0xB0, 0x18, 0x00, 0xD1, 0x81, 0x05, 0xB1, 0x40, 0x38, 0x1F, 0x03, 0x28
 */

/* From an Athena smart card */
 0x3B, 0xD5, 0x18, 0xFF, 0x80, 0x91, 0xFE, 0x1F, 0xC3, 0x80, 0x73, 0xC8, 0x21,
 0x13, 0x08
};

#define VSCARD_IN_SIZE      (64 * KiB)

/* maximum size of ATR - from 7816-3 */
#define MAX_ATR_SIZE        40

typedef struct PassthruState PassthruState;

struct PassthruState {
    CCIDCardState base;
    CharBackend cs;
    uint8_t  vscard_in_data[VSCARD_IN_SIZE];
    uint32_t vscard_in_pos;
    uint32_t vscard_in_hdr;
    uint8_t  atr[MAX_ATR_SIZE];
    uint8_t  atr_length;
    uint8_t  debug;
};

#define TYPE_CCID_PASSTHRU "ccid-card-passthru"
#define PASSTHRU_CCID_CARD(obj) \
    OBJECT_CHECK(PassthruState, (obj), TYPE_CCID_PASSTHRU)

/*
 * VSCard protocol over chardev
 * This code should not depend on the card type.
 */

static void ccid_card_vscard_send_msg(PassthruState *s,
        VSCMsgType type, uint32_t reader_id,
        const uint8_t *payload, uint32_t length)
{
    VSCMsgHeader scr_msg_header;

    scr_msg_header.type = htonl(type);
    scr_msg_header.reader_id = htonl(reader_id);
    scr_msg_header.length = htonl(length);
    /* XXX this blocks entire thread. Rewrite to use
     * qemu_chr_fe_write and background I/O callbacks */
    qemu_chr_fe_write_all(&s->cs, (uint8_t *)&scr_msg_header,
                          sizeof(VSCMsgHeader));
    qemu_chr_fe_write_all(&s->cs, payload, length);
}

static void ccid_card_vscard_send_apdu(PassthruState *s,
    const uint8_t *apdu, uint32_t length)
{
    ccid_card_vscard_send_msg(
        s, VSC_APDU, VSCARD_MINIMAL_READER_ID, apdu, length);
}

static void ccid_card_vscard_send_error(PassthruState *s,
                    uint32_t reader_id, VSCErrorCode code)
{
    VSCMsgError msg = {.code = htonl(code)};

    ccid_card_vscard_send_msg(
        s, VSC_Error, reader_id, (uint8_t *)&msg, sizeof(msg));
}

static void ccid_card_vscard_send_init(PassthruState *s)
{
    VSCMsgInit msg = {
        .version = htonl(VSCARD_VERSION),
        .magic = VSCARD_MAGIC,
        .capabilities = {0}
    };

    ccid_card_vscard_send_msg(s, VSC_Init, VSCARD_UNDEFINED_READER_ID,
                         (uint8_t *)&msg, sizeof(msg));
}

static int ccid_card_vscard_can_read(void *opaque)
{
    PassthruState *card = opaque;

    return VSCARD_IN_SIZE >= card->vscard_in_pos ?
           VSCARD_IN_SIZE - card->vscard_in_pos : 0;
}

static void ccid_card_vscard_handle_init(
    PassthruState *card, VSCMsgHeader *hdr, VSCMsgInit *init)
{
    uint32_t *capabilities;
    int num_capabilities;
    int i;

    capabilities = init->capabilities;
    num_capabilities =
        1 + ((hdr->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
    init->version = ntohl(init->version);
    for (i = 0 ; i < num_capabilities; ++i) {
        capabilities[i] = ntohl(capabilities[i]);
    }
    if (init->magic != VSCARD_MAGIC) {
        error_report("wrong magic");
        /* we can't disconnect the chardev */
    }
    if (init->version != VSCARD_VERSION) {
        DPRINTF(card, D_WARN,
            "got version %d, have %d", init->version, VSCARD_VERSION);
    }
    /* future handling of capabilities, none exist atm */
    ccid_card_vscard_send_init(card);
}

static int check_atr(PassthruState *card, uint8_t *data, int len)
{
    int historical_length, opt_bytes;
    int td_count = 0;
    int td;

    if (len < 2) {
        return 0;
    }
    historical_length = data[1] & 0xf;
    opt_bytes = 0;
    if (data[0] != 0x3b && data[0] != 0x3f) {
        DPRINTF(card, D_WARN, "atr's T0 is 0x%X, not in {0x3b, 0x3f}\n",
                data[0]);
        return 0;
    }
    td_count = 0;
    td = data[1] >> 4;
    while (td && td_count < 2 && opt_bytes + historical_length + 2 < len) {
        td_count++;
        if (td & 0x1) {
            opt_bytes++;
        }
        if (td & 0x2) {
            opt_bytes++;
        }
        if (td & 0x4) {
            opt_bytes++;
        }
        if (td & 0x8) {
            opt_bytes++;
            td = data[opt_bytes + 2] >> 4;
        }
    }
    if (len < 2 + historical_length + opt_bytes) {
        DPRINTF(card, D_WARN,
            "atr too short: len %d, but historical_len %d, T1 0x%X\n",
            len, historical_length, data[1]);
        return 0;
    }
    if (len > 2 + historical_length + opt_bytes) {
        DPRINTF(card, D_WARN,
            "atr too long: len %d, but hist/opt %d/%d, T1 0x%X\n",
            len, historical_length, opt_bytes, data[1]);
        /* let it through */
    }
    DPRINTF(card, D_VERBOSE,
            "atr passes check: %d total length, %d historical, %d optional\n",
            len, historical_length, opt_bytes);

    return 1;
}

static void ccid_card_vscard_handle_message(PassthruState *card,
    VSCMsgHeader *scr_msg_header)
{
    uint8_t *data = (uint8_t *)&scr_msg_header[1];

    switch (scr_msg_header->type) {
    case VSC_ATR:
        DPRINTF(card, D_INFO, "VSC_ATR %d\n", scr_msg_header->length);
        if (scr_msg_header->length > MAX_ATR_SIZE) {
            error_report("ATR size exceeds spec, ignoring");
            ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
                                        VSC_GENERAL_ERROR);
            break;
        }
        if (!check_atr(card, data, scr_msg_header->length)) {
            error_report("ATR is inconsistent, ignoring");
            ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
                                        VSC_GENERAL_ERROR);
            break;
        }
        memcpy(card->atr, data, scr_msg_header->length);
        card->atr_length = scr_msg_header->length;
        ccid_card_card_inserted(&card->base);
        ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
                                    VSC_SUCCESS);
        break;
    case VSC_APDU:
        ccid_card_send_apdu_to_guest(
            &card->base, data, scr_msg_header->length);
        break;
    case VSC_CardRemove:
        DPRINTF(card, D_INFO, "VSC_CardRemove\n");
        ccid_card_card_removed(&card->base);
        ccid_card_vscard_send_error(card,
            scr_msg_header->reader_id, VSC_SUCCESS);
        break;
    case VSC_Init:
        ccid_card_vscard_handle_init(
            card, scr_msg_header, (VSCMsgInit *)data);
        break;
    case VSC_Error:
        ccid_card_card_error(&card->base, *(uint32_t *)data);
        break;
    case VSC_ReaderAdd:
        if (ccid_card_ccid_attach(&card->base) < 0) {
            ccid_card_vscard_send_error(card, VSCARD_UNDEFINED_READER_ID,
                                      VSC_CANNOT_ADD_MORE_READERS);
        } else {
            ccid_card_vscard_send_error(card, VSCARD_MINIMAL_READER_ID,
                                        VSC_SUCCESS);
        }
        break;
    case VSC_ReaderRemove:
        ccid_card_ccid_detach(&card->base);
        ccid_card_vscard_send_error(card,
            scr_msg_header->reader_id, VSC_SUCCESS);
        break;
    default:
        printf("usb-ccid: chardev: unexpected message of type %X\n",
               scr_msg_header->type);
        ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
            VSC_GENERAL_ERROR);
    }
}

static void ccid_card_vscard_drop_connection(PassthruState *card)
{
    qemu_chr_fe_deinit(&card->cs, true);
    card->vscard_in_pos = card->vscard_in_hdr = 0;
}

static void ccid_card_vscard_read(void *opaque, const uint8_t *buf, int size)
{
    PassthruState *card = opaque;
    VSCMsgHeader *hdr;

    if (card->vscard_in_pos + size > VSCARD_IN_SIZE) {
        error_report("no room for data: pos %u +  size %d > %" PRId64 "."
                     " dropping connection.",
                     card->vscard_in_pos, size, VSCARD_IN_SIZE);
        ccid_card_vscard_drop_connection(card);
        return;
    }
    assert(card->vscard_in_pos < VSCARD_IN_SIZE);
    assert(card->vscard_in_hdr < VSCARD_IN_SIZE);
    memcpy(card->vscard_in_data + card->vscard_in_pos, buf, size);
    card->vscard_in_pos += size;
    hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);

    while ((card->vscard_in_pos - card->vscard_in_hdr >= sizeof(VSCMsgHeader))
         &&(card->vscard_in_pos - card->vscard_in_hdr >=
                                  sizeof(VSCMsgHeader) + ntohl(hdr->length))) {
        hdr->reader_id = ntohl(hdr->reader_id);
        hdr->length = ntohl(hdr->length);
        hdr->type = ntohl(hdr->type);
        ccid_card_vscard_handle_message(card, hdr);
        card->vscard_in_hdr += hdr->length + sizeof(VSCMsgHeader);
        hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
    }
    if (card->vscard_in_hdr == card->vscard_in_pos) {
        card->vscard_in_pos = card->vscard_in_hdr = 0;
    }
}

static void ccid_card_vscard_event(void *opaque, int event)
{
    PassthruState *card = opaque;

    switch (event) {
    case CHR_EVENT_BREAK:
        card->vscard_in_pos = card->vscard_in_hdr = 0;
        break;
    case CHR_EVENT_OPENED:
        DPRINTF(card, D_INFO, "%s: CHR_EVENT_OPENED\n", __func__);
        break;
    }
}

/* End VSCard handling */

static void passthru_apdu_from_guest(
    CCIDCardState *base, const uint8_t *apdu, uint32_t len)
{
    PassthruState *card = PASSTHRU_CCID_CARD(base);

    if (!qemu_chr_fe_backend_connected(&card->cs)) {
        printf("ccid-passthru: no chardev, discarding apdu length %d\n", len);
        return;
    }
    ccid_card_vscard_send_apdu(card, apdu, len);
}

static const uint8_t *passthru_get_atr(CCIDCardState *base, uint32_t *len)
{
    PassthruState *card = PASSTHRU_CCID_CARD(base);

    *len = card->atr_length;
    return card->atr;
}

static void passthru_realize(CCIDCardState *base, Error **errp)
{
    PassthruState *card = PASSTHRU_CCID_CARD(base);

    card->vscard_in_pos = 0;
    card->vscard_in_hdr = 0;
    if (qemu_chr_fe_backend_connected(&card->cs)) {
        DPRINTF(card, D_INFO, "ccid-card-passthru: initing chardev");
        qemu_chr_fe_set_handlers(&card->cs,
            ccid_card_vscard_can_read,
            ccid_card_vscard_read,
            ccid_card_vscard_event, NULL, card, NULL, true);
        ccid_card_vscard_send_init(card);
    } else {
        error_setg(errp, "missing chardev");
        return;
    }
    card->debug = parse_debug_env("QEMU_CCID_PASSTHRU_DEBUG", D_VERBOSE,
                                  card->debug);
    assert(sizeof(DEFAULT_ATR) <= MAX_ATR_SIZE);
    memcpy(card->atr, DEFAULT_ATR, sizeof(DEFAULT_ATR));
    card->atr_length = sizeof(DEFAULT_ATR);
}

static VMStateDescription passthru_vmstate = {
    .name = "ccid-card-passthru",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_BUFFER(vscard_in_data, PassthruState),
        VMSTATE_UINT32(vscard_in_pos, PassthruState),
        VMSTATE_UINT32(vscard_in_hdr, PassthruState),
        VMSTATE_BUFFER(atr, PassthruState),
        VMSTATE_UINT8(atr_length, PassthruState),
        VMSTATE_END_OF_LIST()
    }
};

static Property passthru_card_properties[] = {
    DEFINE_PROP_CHR("chardev", PassthruState, cs),
    DEFINE_PROP_UINT8("debug", PassthruState, debug, 0),
    DEFINE_PROP_END_OF_LIST(),
};

static void passthru_class_initfn(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    CCIDCardClass *cc = CCID_CARD_CLASS(klass);

    cc->realize = passthru_realize;
    cc->get_atr = passthru_get_atr;
    cc->apdu_from_guest = passthru_apdu_from_guest;
    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
    dc->desc = "passthrough smartcard";
    dc->vmsd = &passthru_vmstate;
    dc->props = passthru_card_properties;
}

static const TypeInfo passthru_card_info = {
    .name          = TYPE_CCID_PASSTHRU,
    .parent        = TYPE_CCID_CARD,
    .instance_size = sizeof(PassthruState),
    .class_init    = passthru_class_initfn,
};

static void ccid_card_passthru_register_types(void)
{
    type_register_static(&passthru_card_info);
}

type_init(ccid_card_passthru_register_types)
Commit	Line	Data
edbb2136 AL	1	/*
	2	* CCID Passthru Card Device emulation
	3	*
	4	* Copyright (c) 2011 Red Hat.
	5	* Written by Alon Levy.
	6	*
	7	* This work is licensed under the terms of the GNU GPL, version 2.1 or later.
	8	* See the COPYING file in the top-level directory.
	9	*/
	10
e532b2e0	11	#include "qemu/osdep.h"
a8d25326	12	#include "qemu-common.h"
246e195b	13	#include "qemu/units.h"
0f5c642d	14	#include <libcacard.h>
4d43a603	15	#include "chardev/char-fe.h"
d49b6836	16	#include "qemu/error-report.h"
0b8fa32f	17	#include "qemu/module.h"
1de7afc9	18	#include "qemu/sockets.h"
47b43a1f	19	#include "ccid.h"
cc847bfd	20	#include "qapi/error.h"
edbb2136 AL	21
	22	#define DPRINTF(card, lvl, fmt, ...) \
	23	do { \
	24	if (lvl <= card->debug) { \
	25	printf("ccid-card-passthru: " fmt , ## __VA_ARGS__); \
	26	} \
	27	} while (0)
	28
	29	#define D_WARN 1
	30	#define D_INFO 2
	31	#define D_MORE_INFO 3
	32	#define D_VERBOSE 4
	33
	34	/* TODO: do we still need this? */
da000a48	35	static const uint8_t DEFAULT_ATR[] = {
edbb2136 AL	36	/*
	37	* From some example somewhere
	38	* 0x3B, 0xB0, 0x18, 0x00, 0xD1, 0x81, 0x05, 0xB1, 0x40, 0x38, 0x1F, 0x03, 0x28
	39	*/
	40
	41	/* From an Athena smart card */
	42	0x3B, 0xD5, 0x18, 0xFF, 0x80, 0x91, 0xFE, 0x1F, 0xC3, 0x80, 0x73, 0xC8, 0x21,
	43	0x13, 0x08
	44	};
	45
246e195b	46	#define VSCARD_IN_SIZE (64 * KiB)
edbb2136 AL	47
	48	/* maximum size of ATR - from 7816-3 */
	49	#define MAX_ATR_SIZE 40
	50
	51	typedef struct PassthruState PassthruState;
	52
	53	struct PassthruState {
	54	CCIDCardState base;
becdfa00	55	CharBackend cs;
edbb2136 AL	56	uint8_t vscard_in_data[VSCARD_IN_SIZE];
	57	uint32_t vscard_in_pos;
	58	uint32_t vscard_in_hdr;
	59	uint8_t atr[MAX_ATR_SIZE];
	60	uint8_t atr_length;
	61	uint8_t debug;
	62	};
	63
059db204 C	64	#define TYPE_CCID_PASSTHRU "ccid-card-passthru"
	65	#define PASSTHRU_CCID_CARD(obj) \
	66	OBJECT_CHECK(PassthruState, (obj), TYPE_CCID_PASSTHRU)
	67
edbb2136 AL	68	/*
	69	* VSCard protocol over chardev
	70	* This code should not depend on the card type.
	71	*/
	72
	73	static void ccid_card_vscard_send_msg(PassthruState *s,
	74	VSCMsgType type, uint32_t reader_id,
	75	const uint8_t *payload, uint32_t length)
	76	{
	77	VSCMsgHeader scr_msg_header;
	78
	79	scr_msg_header.type = htonl(type);
	80	scr_msg_header.reader_id = htonl(reader_id);
	81	scr_msg_header.length = htonl(length);
6ab3fc32 DB	82	/* XXX this blocks entire thread. Rewrite to use
6ab3fc32 DB	83	* qemu_chr_fe_write and background I/O callbacks */
5345fdb4	84	qemu_chr_fe_write_all(&s->cs, (uint8_t *)&scr_msg_header,
6ab3fc32	85	sizeof(VSCMsgHeader));
5345fdb4	86	qemu_chr_fe_write_all(&s->cs, payload, length);
edbb2136 AL	87	}
	88
	89	static void ccid_card_vscard_send_apdu(PassthruState *s,
	90	const uint8_t *apdu, uint32_t length)
	91	{
	92	ccid_card_vscard_send_msg(
	93	s, VSC_APDU, VSCARD_MINIMAL_READER_ID, apdu, length);
	94	}
	95
	96	static void ccid_card_vscard_send_error(PassthruState *s,
	97	uint32_t reader_id, VSCErrorCode code)
	98	{
	99	VSCMsgError msg = {.code = htonl(code)};
	100
	101	ccid_card_vscard_send_msg(
	102	s, VSC_Error, reader_id, (uint8_t *)&msg, sizeof(msg));
	103	}
	104
	105	static void ccid_card_vscard_send_init(PassthruState *s)
	106	{
	107	VSCMsgInit msg = {
	108	.version = htonl(VSCARD_VERSION),
	109	.magic = VSCARD_MAGIC,
	110	.capabilities = {0}
	111	};
	112
	113	ccid_card_vscard_send_msg(s, VSC_Init, VSCARD_UNDEFINED_READER_ID,
	114	(uint8_t *)&msg, sizeof(msg));
	115	}
	116
	117	static int ccid_card_vscard_can_read(void *opaque)
	118	{
	119	PassthruState *card = opaque;
	120
	121	return VSCARD_IN_SIZE >= card->vscard_in_pos ?
	122	VSCARD_IN_SIZE - card->vscard_in_pos : 0;
	123	}
	124
	125	static void ccid_card_vscard_handle_init(
	126	PassthruState card, VSCMsgHeader hdr, VSCMsgInit *init)
	127	{
	128	uint32_t *capabilities;
	129	int num_capabilities;
	130	int i;
	131
	132	capabilities = init->capabilities;
	133	num_capabilities =
	134	1 + ((hdr->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
	135	init->version = ntohl(init->version);
	136	for (i = 0 ; i < num_capabilities; ++i) {
	137	capabilities[i] = ntohl(capabilities[i]);
	138	}
	139	if (init->magic != VSCARD_MAGIC) {
	140	error_report("wrong magic");
	141	/* we can't disconnect the chardev */
	142	}
	143	if (init->version != VSCARD_VERSION) {
	144	DPRINTF(card, D_WARN,
	145	"got version %d, have %d", init->version, VSCARD_VERSION);
	146	}
	147	/* future handling of capabilities, none exist atm */
	148	ccid_card_vscard_send_init(card);
	149	}
	150
0e61400c AL	151	static int check_atr(PassthruState card, uint8_t data, int len)
	152	{
	153	int historical_length, opt_bytes;
	154	int td_count = 0;
	155	int td;
	156
	157	if (len < 2) {
	158	return 0;
	159	}
	160	historical_length = data[1] & 0xf;
	161	opt_bytes = 0;
	162	if (data[0] != 0x3b && data[0] != 0x3f) {
	163	DPRINTF(card, D_WARN, "atr's T0 is 0x%X, not in {0x3b, 0x3f}\n",
	164	data[0]);
	165	return 0;
	166	}
	167	td_count = 0;
	168	td = data[1] >> 4;
	169	while (td && td_count < 2 && opt_bytes + historical_length + 2 < len) {
	170	td_count++;
	171	if (td & 0x1) {
	172	opt_bytes++;
	173	}
	174	if (td & 0x2) {
	175	opt_bytes++;
	176	}
	177	if (td & 0x4) {
	178	opt_bytes++;
	179	}
	180	if (td & 0x8) {
	181	opt_bytes++;
	182	td = data[opt_bytes + 2] >> 4;
	183	}
	184	}
	185	if (len < 2 + historical_length + opt_bytes) {
	186	DPRINTF(card, D_WARN,
	187	"atr too short: len %d, but historical_len %d, T1 0x%X\n",
	188	len, historical_length, data[1]);
	189	return 0;
	190	}
	191	if (len > 2 + historical_length + opt_bytes) {
	192	DPRINTF(card, D_WARN,
	193	"atr too long: len %d, but hist/opt %d/%d, T1 0x%X\n",
	194	len, historical_length, opt_bytes, data[1]);
	195	/* let it through */
	196	}
	197	DPRINTF(card, D_VERBOSE,
	198	"atr passes check: %d total length, %d historical, %d optional\n",
	199	len, historical_length, opt_bytes);
	200
	201	return 1;
	202	}
	203
edbb2136 AL	204	static void ccid_card_vscard_handle_message(PassthruState *card,
	205	VSCMsgHeader *scr_msg_header)
	206	{
	207	uint8_t data = (uint8_t )&scr_msg_header[1];
	208
	209	switch (scr_msg_header->type) {
	210	case VSC_ATR:
	211	DPRINTF(card, D_INFO, "VSC_ATR %d\n", scr_msg_header->length);
	212	if (scr_msg_header->length > MAX_ATR_SIZE) {
	213	error_report("ATR size exceeds spec, ignoring");
	214	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	215	VSC_GENERAL_ERROR);
7e62255a	216	break;
edbb2136	217	}
0e61400c AL	218	if (!check_atr(card, data, scr_msg_header->length)) {
	219	error_report("ATR is inconsistent, ignoring");
	220	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	221	VSC_GENERAL_ERROR);
	222	break;
	223	}
edbb2136 AL	224	memcpy(card->atr, data, scr_msg_header->length);
	225	card->atr_length = scr_msg_header->length;
	226	ccid_card_card_inserted(&card->base);
	227	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	228	VSC_SUCCESS);
	229	break;
	230	case VSC_APDU:
	231	ccid_card_send_apdu_to_guest(
	232	&card->base, data, scr_msg_header->length);
	233	break;
	234	case VSC_CardRemove:
	235	DPRINTF(card, D_INFO, "VSC_CardRemove\n");
	236	ccid_card_card_removed(&card->base);
	237	ccid_card_vscard_send_error(card,
	238	scr_msg_header->reader_id, VSC_SUCCESS);
	239	break;
	240	case VSC_Init:
	241	ccid_card_vscard_handle_init(
	242	card, scr_msg_header, (VSCMsgInit *)data);
	243	break;
	244	case VSC_Error:
	245	ccid_card_card_error(&card->base, (uint32_t )data);
	246	break;
	247	case VSC_ReaderAdd:
	248	if (ccid_card_ccid_attach(&card->base) < 0) {
	249	ccid_card_vscard_send_error(card, VSCARD_UNDEFINED_READER_ID,
	250	VSC_CANNOT_ADD_MORE_READERS);
	251	} else {
	252	ccid_card_vscard_send_error(card, VSCARD_MINIMAL_READER_ID,
	253	VSC_SUCCESS);
	254	}
	255	break;
	256	case VSC_ReaderRemove:
	257	ccid_card_ccid_detach(&card->base);
	258	ccid_card_vscard_send_error(card,
	259	scr_msg_header->reader_id, VSC_SUCCESS);
	260	break;
	261	default:
	262	printf("usb-ccid: chardev: unexpected message of type %X\n",
	263	scr_msg_header->type);
	264	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	265	VSC_GENERAL_ERROR);
	266	}
	267	}
	268
	269	static void ccid_card_vscard_drop_connection(PassthruState *card)
	270	{
1ce2610c	271	qemu_chr_fe_deinit(&card->cs, true);
edbb2136 AL	272	card->vscard_in_pos = card->vscard_in_hdr = 0;
	273	}
	274
	275	static void ccid_card_vscard_read(void opaque, const uint8_t buf, int size)
	276	{
	277	PassthruState *card = opaque;
	278	VSCMsgHeader *hdr;
	279
	280	if (card->vscard_in_pos + size > VSCARD_IN_SIZE) {
246e195b PMD	281	error_report("no room for data: pos %u + size %d > %" PRId64 "."
	282	" dropping connection.",
	283	card->vscard_in_pos, size, VSCARD_IN_SIZE);
edbb2136 AL	284	ccid_card_vscard_drop_connection(card);
	285	return;
	286	}
	287	assert(card->vscard_in_pos < VSCARD_IN_SIZE);
	288	assert(card->vscard_in_hdr < VSCARD_IN_SIZE);
	289	memcpy(card->vscard_in_data + card->vscard_in_pos, buf, size);
	290	card->vscard_in_pos += size;
	291	hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
	292
	293	while ((card->vscard_in_pos - card->vscard_in_hdr >= sizeof(VSCMsgHeader))
	294	&&(card->vscard_in_pos - card->vscard_in_hdr >=
	295	sizeof(VSCMsgHeader) + ntohl(hdr->length))) {
	296	hdr->reader_id = ntohl(hdr->reader_id);
	297	hdr->length = ntohl(hdr->length);
	298	hdr->type = ntohl(hdr->type);
	299	ccid_card_vscard_handle_message(card, hdr);
	300	card->vscard_in_hdr += hdr->length + sizeof(VSCMsgHeader);
	301	hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
	302	}
	303	if (card->vscard_in_hdr == card->vscard_in_pos) {
	304	card->vscard_in_pos = card->vscard_in_hdr = 0;
	305	}
	306	}
	307
	308	static void ccid_card_vscard_event(void *opaque, int event)
	309	{
	310	PassthruState *card = opaque;
	311
	312	switch (event) {
	313	case CHR_EVENT_BREAK:
	314	card->vscard_in_pos = card->vscard_in_hdr = 0;
	315	break;
edbb2136 AL	316	case CHR_EVENT_OPENED:
	317	DPRINTF(card, D_INFO, "%s: CHR_EVENT_OPENED\n", __func__);
	318	break;
	319	}
	320	}
	321
	322	/* End VSCard handling */
	323
	324	static void passthru_apdu_from_guest(
	325	CCIDCardState base, const uint8_t apdu, uint32_t len)
	326	{
059db204	327	PassthruState *card = PASSTHRU_CCID_CARD(base);
edbb2136	328
30650701	329	if (!qemu_chr_fe_backend_connected(&card->cs)) {
edbb2136 AL	330	printf("ccid-passthru: no chardev, discarding apdu length %d\n", len);
	331	return;
	332	}
	333	ccid_card_vscard_send_apdu(card, apdu, len);
	334	}
	335
	336	static const uint8_t passthru_get_atr(CCIDCardState base, uint32_t *len)
	337	{
059db204	338	PassthruState *card = PASSTHRU_CCID_CARD(base);
edbb2136 AL	339
	340	*len = card->atr_length;
	341	return card->atr;
	342	}
	343
cc847bfd	344	static void passthru_realize(CCIDCardState base, Error *errp)
edbb2136	345	{
059db204	346	PassthruState *card = PASSTHRU_CCID_CARD(base);
edbb2136 AL	347
	348	card->vscard_in_pos = 0;
	349	card->vscard_in_hdr = 0;
30650701	350	if (qemu_chr_fe_backend_connected(&card->cs)) {
e58d64a1	351	DPRINTF(card, D_INFO, "ccid-card-passthru: initing chardev");
5345fdb4	352	qemu_chr_fe_set_handlers(&card->cs,
edbb2136 AL	353	ccid_card_vscard_can_read,
edbb2136 AL	354	ccid_card_vscard_read,
81517ba3	355	ccid_card_vscard_event, NULL, card, NULL, true);
edbb2136 AL	356	ccid_card_vscard_send_init(card);
edbb2136 AL	357	} else {
cc847bfd MZ	358	error_setg(errp, "missing chardev");
cc847bfd MZ	359	return;
edbb2136	360	}
b16352ac AL	361	card->debug = parse_debug_env("QEMU_CCID_PASSTHRU_DEBUG", D_VERBOSE,
b16352ac AL	362	card->debug);
edbb2136 AL	363	assert(sizeof(DEFAULT_ATR) <= MAX_ATR_SIZE);
	364	memcpy(card->atr, DEFAULT_ATR, sizeof(DEFAULT_ATR));
	365	card->atr_length = sizeof(DEFAULT_ATR);
edbb2136 AL	366	}
edbb2136 AL	367
edbb2136	368	static VMStateDescription passthru_vmstate = {
6783ecf1	369	.name = "ccid-card-passthru",
edbb2136 AL	370	.version_id = 1,
	371	.minimum_version_id = 1,
	372	.fields = (VMStateField[]) {
	373	VMSTATE_BUFFER(vscard_in_data, PassthruState),
	374	VMSTATE_UINT32(vscard_in_pos, PassthruState),
	375	VMSTATE_UINT32(vscard_in_hdr, PassthruState),
	376	VMSTATE_BUFFER(atr, PassthruState),
	377	VMSTATE_UINT8(atr_length, PassthruState),
	378	VMSTATE_END_OF_LIST()
	379	}
	380	};
	381
39bffca2 AL	382	static Property passthru_card_properties[] = {
	383	DEFINE_PROP_CHR("chardev", PassthruState, cs),
	384	DEFINE_PROP_UINT8("debug", PassthruState, debug, 0),
	385	DEFINE_PROP_END_OF_LIST(),
	386	};
	387
ba7c0520 AL	388	static void passthru_class_initfn(ObjectClass klass, void data)
ba7c0520 AL	389	{
39bffca2	390	DeviceClass *dc = DEVICE_CLASS(klass);
ba7c0520 AL	391	CCIDCardClass *cc = CCID_CARD_CLASS(klass);
ba7c0520 AL	392
cc847bfd	393	cc->realize = passthru_realize;
ba7c0520 AL	394	cc->get_atr = passthru_get_atr;
ba7c0520 AL	395	cc->apdu_from_guest = passthru_apdu_from_guest;
125ee0ed	396	set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
39bffca2 AL	397	dc->desc = "passthrough smartcard";
	398	dc->vmsd = &passthru_vmstate;
	399	dc->props = passthru_card_properties;
ba7c0520 AL	400	}
ba7c0520 AL	401
8c43a6f0	402	static const TypeInfo passthru_card_info = {
059db204	403	.name = TYPE_CCID_PASSTHRU,
39bffca2 AL	404	.parent = TYPE_CCID_CARD,
	405	.instance_size = sizeof(PassthruState),
	406	.class_init = passthru_class_initfn,
edbb2136 AL	407	};
edbb2136 AL	408
83f7d43a	409	static void ccid_card_passthru_register_types(void)
edbb2136	410	{
39bffca2	411	type_register_static(&passthru_card_info);
edbb2136 AL	412	}
edbb2136 AL	413
83f7d43a	414	type_init(ccid_card_passthru_register_types)