[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 "sysemu/char.h"
#include "qemu/sockets.h"
#include "monitor/monitor.h"
#include "ccid.h"
#include "libcacard/vscard_common.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 PASSTHRU_DEV_NAME "ccid-card-passthru"
#define VSCARD_IN_SIZE 65536

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

typedef struct PassthruState PassthruState;

struct PassthruState {
    CCIDCardState base;
    CharDriverState *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;
};

/*
 * 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);
    qemu_chr_fe_write(s->cs, (uint8_t *)&scr_msg_header, sizeof(VSCMsgHeader));
    qemu_chr_fe_write(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_delete(card->cs);
    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 %d +  size %d > %d. 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_FOCUS:
        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 = DO_UPCAST(PassthruState, base, base);

    if (!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 = DO_UPCAST(PassthruState, base, base);

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

static int passthru_initfn(CCIDCardState *base)
{
    PassthruState *card = DO_UPCAST(PassthruState, base, base);

    card->vscard_in_pos = 0;
    card->vscard_in_hdr = 0;
    if (card->cs) {
        DPRINTF(card, D_INFO, "initing chardev\n");
        qemu_chr_add_handlers(card->cs,
            ccid_card_vscard_can_read,
            ccid_card_vscard_read,
            ccid_card_vscard_event, card);
        ccid_card_vscard_send_init(card);
    } else {
        error_report("missing chardev");
        return -1;
    }
    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);
    return 0;
}

static int passthru_exitfn(CCIDCardState *base)
{
    return 0;
}

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->initfn = passthru_initfn;
    cc->exitfn = passthru_exitfn;
    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          = PASSTHRU_DEV_NAME,
    .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
dccfcd0e	11	#include "sysemu/char.h"
1de7afc9	12	#include "qemu/sockets.h"
83c9089e	13	#include "monitor/monitor.h"
47b43a1f	14	#include "ccid.h"
edbb2136 AL	15	#include "libcacard/vscard_common.h"
	16
	17	#define DPRINTF(card, lvl, fmt, ...) \
	18	do { \
	19	if (lvl <= card->debug) { \
	20	printf("ccid-card-passthru: " fmt , ## __VA_ARGS__); \
	21	} \
	22	} while (0)
	23
	24	#define D_WARN 1
	25	#define D_INFO 2
	26	#define D_MORE_INFO 3
	27	#define D_VERBOSE 4
	28
	29	/* TODO: do we still need this? */
da000a48	30	static const uint8_t DEFAULT_ATR[] = {
edbb2136 AL	31	/*
	32	* From some example somewhere
	33	* 0x3B, 0xB0, 0x18, 0x00, 0xD1, 0x81, 0x05, 0xB1, 0x40, 0x38, 0x1F, 0x03, 0x28
	34	*/
	35
	36	/* From an Athena smart card */
	37	0x3B, 0xD5, 0x18, 0xFF, 0x80, 0x91, 0xFE, 0x1F, 0xC3, 0x80, 0x73, 0xC8, 0x21,
	38	0x13, 0x08
	39	};
	40
	41
	42	#define PASSTHRU_DEV_NAME "ccid-card-passthru"
	43	#define VSCARD_IN_SIZE 65536
	44
	45	/* maximum size of ATR - from 7816-3 */
	46	#define MAX_ATR_SIZE 40
	47
	48	typedef struct PassthruState PassthruState;
	49
	50	struct PassthruState {
	51	CCIDCardState base;
	52	CharDriverState *cs;
	53	uint8_t vscard_in_data[VSCARD_IN_SIZE];
	54	uint32_t vscard_in_pos;
	55	uint32_t vscard_in_hdr;
	56	uint8_t atr[MAX_ATR_SIZE];
	57	uint8_t atr_length;
	58	uint8_t debug;
	59	};
	60
	61	/*
	62	* VSCard protocol over chardev
	63	* This code should not depend on the card type.
	64	*/
	65
	66	static void ccid_card_vscard_send_msg(PassthruState *s,
	67	VSCMsgType type, uint32_t reader_id,
	68	const uint8_t *payload, uint32_t length)
	69	{
	70	VSCMsgHeader scr_msg_header;
	71
	72	scr_msg_header.type = htonl(type);
	73	scr_msg_header.reader_id = htonl(reader_id);
	74	scr_msg_header.length = htonl(length);
2cc6e0a1 AL	75	qemu_chr_fe_write(s->cs, (uint8_t *)&scr_msg_header, sizeof(VSCMsgHeader));
2cc6e0a1 AL	76	qemu_chr_fe_write(s->cs, payload, length);
edbb2136 AL	77	}
	78
	79	static void ccid_card_vscard_send_apdu(PassthruState *s,
	80	const uint8_t *apdu, uint32_t length)
	81	{
	82	ccid_card_vscard_send_msg(
	83	s, VSC_APDU, VSCARD_MINIMAL_READER_ID, apdu, length);
	84	}
	85
	86	static void ccid_card_vscard_send_error(PassthruState *s,
	87	uint32_t reader_id, VSCErrorCode code)
	88	{
	89	VSCMsgError msg = {.code = htonl(code)};
	90
	91	ccid_card_vscard_send_msg(
	92	s, VSC_Error, reader_id, (uint8_t *)&msg, sizeof(msg));
	93	}
	94
	95	static void ccid_card_vscard_send_init(PassthruState *s)
	96	{
	97	VSCMsgInit msg = {
	98	.version = htonl(VSCARD_VERSION),
	99	.magic = VSCARD_MAGIC,
	100	.capabilities = {0}
	101	};
	102
	103	ccid_card_vscard_send_msg(s, VSC_Init, VSCARD_UNDEFINED_READER_ID,
	104	(uint8_t *)&msg, sizeof(msg));
	105	}
	106
	107	static int ccid_card_vscard_can_read(void *opaque)
	108	{
	109	PassthruState *card = opaque;
	110
	111	return VSCARD_IN_SIZE >= card->vscard_in_pos ?
	112	VSCARD_IN_SIZE - card->vscard_in_pos : 0;
	113	}
	114
	115	static void ccid_card_vscard_handle_init(
	116	PassthruState card, VSCMsgHeader hdr, VSCMsgInit *init)
	117	{
	118	uint32_t *capabilities;
	119	int num_capabilities;
	120	int i;
	121
	122	capabilities = init->capabilities;
	123	num_capabilities =
	124	1 + ((hdr->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
	125	init->version = ntohl(init->version);
	126	for (i = 0 ; i < num_capabilities; ++i) {
	127	capabilities[i] = ntohl(capabilities[i]);
	128	}
	129	if (init->magic != VSCARD_MAGIC) {
	130	error_report("wrong magic");
	131	/* we can't disconnect the chardev */
	132	}
	133	if (init->version != VSCARD_VERSION) {
	134	DPRINTF(card, D_WARN,
	135	"got version %d, have %d", init->version, VSCARD_VERSION);
	136	}
	137	/* future handling of capabilities, none exist atm */
	138	ccid_card_vscard_send_init(card);
	139	}
	140
0e61400c AL	141	static int check_atr(PassthruState card, uint8_t data, int len)
	142	{
	143	int historical_length, opt_bytes;
	144	int td_count = 0;
	145	int td;
	146
	147	if (len < 2) {
	148	return 0;
	149	}
	150	historical_length = data[1] & 0xf;
	151	opt_bytes = 0;
	152	if (data[0] != 0x3b && data[0] != 0x3f) {
	153	DPRINTF(card, D_WARN, "atr's T0 is 0x%X, not in {0x3b, 0x3f}\n",
	154	data[0]);
	155	return 0;
	156	}
	157	td_count = 0;
	158	td = data[1] >> 4;
	159	while (td && td_count < 2 && opt_bytes + historical_length + 2 < len) {
	160	td_count++;
	161	if (td & 0x1) {
	162	opt_bytes++;
	163	}
	164	if (td & 0x2) {
	165	opt_bytes++;
	166	}
	167	if (td & 0x4) {
	168	opt_bytes++;
	169	}
	170	if (td & 0x8) {
	171	opt_bytes++;
	172	td = data[opt_bytes + 2] >> 4;
	173	}
	174	}
	175	if (len < 2 + historical_length + opt_bytes) {
	176	DPRINTF(card, D_WARN,
	177	"atr too short: len %d, but historical_len %d, T1 0x%X\n",
	178	len, historical_length, data[1]);
	179	return 0;
	180	}
	181	if (len > 2 + historical_length + opt_bytes) {
	182	DPRINTF(card, D_WARN,
	183	"atr too long: len %d, but hist/opt %d/%d, T1 0x%X\n",
	184	len, historical_length, opt_bytes, data[1]);
	185	/* let it through */
	186	}
	187	DPRINTF(card, D_VERBOSE,
	188	"atr passes check: %d total length, %d historical, %d optional\n",
	189	len, historical_length, opt_bytes);
	190
	191	return 1;
	192	}
	193
edbb2136 AL	194	static void ccid_card_vscard_handle_message(PassthruState *card,
	195	VSCMsgHeader *scr_msg_header)
	196	{
	197	uint8_t data = (uint8_t )&scr_msg_header[1];
	198
	199	switch (scr_msg_header->type) {
	200	case VSC_ATR:
	201	DPRINTF(card, D_INFO, "VSC_ATR %d\n", scr_msg_header->length);
	202	if (scr_msg_header->length > MAX_ATR_SIZE) {
	203	error_report("ATR size exceeds spec, ignoring");
	204	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	205	VSC_GENERAL_ERROR);
7e62255a	206	break;
edbb2136	207	}
0e61400c AL	208	if (!check_atr(card, data, scr_msg_header->length)) {
	209	error_report("ATR is inconsistent, ignoring");
	210	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	211	VSC_GENERAL_ERROR);
	212	break;
	213	}
edbb2136 AL	214	memcpy(card->atr, data, scr_msg_header->length);
	215	card->atr_length = scr_msg_header->length;
	216	ccid_card_card_inserted(&card->base);
	217	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	218	VSC_SUCCESS);
	219	break;
	220	case VSC_APDU:
	221	ccid_card_send_apdu_to_guest(
	222	&card->base, data, scr_msg_header->length);
	223	break;
	224	case VSC_CardRemove:
	225	DPRINTF(card, D_INFO, "VSC_CardRemove\n");
	226	ccid_card_card_removed(&card->base);
	227	ccid_card_vscard_send_error(card,
	228	scr_msg_header->reader_id, VSC_SUCCESS);
	229	break;
	230	case VSC_Init:
	231	ccid_card_vscard_handle_init(
	232	card, scr_msg_header, (VSCMsgInit *)data);
	233	break;
	234	case VSC_Error:
	235	ccid_card_card_error(&card->base, (uint32_t )data);
	236	break;
	237	case VSC_ReaderAdd:
	238	if (ccid_card_ccid_attach(&card->base) < 0) {
	239	ccid_card_vscard_send_error(card, VSCARD_UNDEFINED_READER_ID,
	240	VSC_CANNOT_ADD_MORE_READERS);
	241	} else {
	242	ccid_card_vscard_send_error(card, VSCARD_MINIMAL_READER_ID,
	243	VSC_SUCCESS);
	244	}
	245	break;
	246	case VSC_ReaderRemove:
	247	ccid_card_ccid_detach(&card->base);
	248	ccid_card_vscard_send_error(card,
	249	scr_msg_header->reader_id, VSC_SUCCESS);
	250	break;
	251	default:
	252	printf("usb-ccid: chardev: unexpected message of type %X\n",
	253	scr_msg_header->type);
	254	ccid_card_vscard_send_error(card, scr_msg_header->reader_id,
	255	VSC_GENERAL_ERROR);
	256	}
	257	}
	258
	259	static void ccid_card_vscard_drop_connection(PassthruState *card)
	260	{
70f24fb6	261	qemu_chr_delete(card->cs);
edbb2136 AL	262	card->vscard_in_pos = card->vscard_in_hdr = 0;
	263	}
	264
	265	static void ccid_card_vscard_read(void opaque, const uint8_t buf, int size)
	266	{
	267	PassthruState *card = opaque;
	268	VSCMsgHeader *hdr;
	269
	270	if (card->vscard_in_pos + size > VSCARD_IN_SIZE) {
	271	error_report(
	272	"no room for data: pos %d + size %d > %d. dropping connection.",
	273	card->vscard_in_pos, size, VSCARD_IN_SIZE);
	274	ccid_card_vscard_drop_connection(card);
	275	return;
	276	}
	277	assert(card->vscard_in_pos < VSCARD_IN_SIZE);
	278	assert(card->vscard_in_hdr < VSCARD_IN_SIZE);
	279	memcpy(card->vscard_in_data + card->vscard_in_pos, buf, size);
	280	card->vscard_in_pos += size;
	281	hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
	282
	283	while ((card->vscard_in_pos - card->vscard_in_hdr >= sizeof(VSCMsgHeader))
	284	&&(card->vscard_in_pos - card->vscard_in_hdr >=
	285	sizeof(VSCMsgHeader) + ntohl(hdr->length))) {
	286	hdr->reader_id = ntohl(hdr->reader_id);
	287	hdr->length = ntohl(hdr->length);
	288	hdr->type = ntohl(hdr->type);
	289	ccid_card_vscard_handle_message(card, hdr);
	290	card->vscard_in_hdr += hdr->length + sizeof(VSCMsgHeader);
	291	hdr = (VSCMsgHeader *)(card->vscard_in_data + card->vscard_in_hdr);
	292	}
	293	if (card->vscard_in_hdr == card->vscard_in_pos) {
	294	card->vscard_in_pos = card->vscard_in_hdr = 0;
	295	}
	296	}
	297
	298	static void ccid_card_vscard_event(void *opaque, int event)
	299	{
	300	PassthruState *card = opaque;
	301
	302	switch (event) {
	303	case CHR_EVENT_BREAK:
	304	card->vscard_in_pos = card->vscard_in_hdr = 0;
	305	break;
	306	case CHR_EVENT_FOCUS:
	307	break;
	308	case CHR_EVENT_OPENED:
	309	DPRINTF(card, D_INFO, "%s: CHR_EVENT_OPENED\n", __func__);
	310	break;
	311	}
	312	}
	313
	314	/* End VSCard handling */
	315
	316	static void passthru_apdu_from_guest(
	317	CCIDCardState base, const uint8_t apdu, uint32_t len)
	318	{
	319	PassthruState *card = DO_UPCAST(PassthruState, base, base);
	320
	321	if (!card->cs) {
	322	printf("ccid-passthru: no chardev, discarding apdu length %d\n", len);
	323	return;
	324	}
	325	ccid_card_vscard_send_apdu(card, apdu, len);
326	}
327
328	static const uint8_t passthru_get_atr(CCIDCardState base, uint32_t *len)
329	{
330	PassthruState *card = DO_UPCAST(PassthruState, base, base);
331
332	*len = card->atr_length;
333	return card->atr;
334	}
335
336	static int passthru_initfn(CCIDCardState *base)
337	{
338	PassthruState *card = DO_UPCAST(PassthruState, base, base);
339
340	card->vscard_in_pos = 0;
341	card->vscard_in_hdr = 0;
342	if (card->cs) {
343	DPRINTF(card, D_INFO, "initing chardev\n");
344	qemu_chr_add_handlers(card->cs,
345	ccid_card_vscard_can_read,
346	ccid_card_vscard_read,
347	ccid_card_vscard_event, card);
348	ccid_card_vscard_send_init(card);
349	} else {
350	error_report("missing chardev");
351	return -1;
352	}
b16352ac AL	353	card->debug = parse_debug_env("QEMU_CCID_PASSTHRU_DEBUG", D_VERBOSE,
b16352ac AL	354	card->debug);
edbb2136 AL	355	assert(sizeof(DEFAULT_ATR) <= MAX_ATR_SIZE);
	356	memcpy(card->atr, DEFAULT_ATR, sizeof(DEFAULT_ATR));
	357	card->atr_length = sizeof(DEFAULT_ATR);
	358	return 0;
	359	}
	360
	361	static int passthru_exitfn(CCIDCardState *base)
	362	{
	363	return 0;
	364	}
	365
	366	static VMStateDescription passthru_vmstate = {
6783ecf1	367	.name = "ccid-card-passthru",
edbb2136 AL	368	.version_id = 1,
	369	.minimum_version_id = 1,
	370	.fields = (VMStateField[]) {
	371	VMSTATE_BUFFER(vscard_in_data, PassthruState),
	372	VMSTATE_UINT32(vscard_in_pos, PassthruState),
	373	VMSTATE_UINT32(vscard_in_hdr, PassthruState),
	374	VMSTATE_BUFFER(atr, PassthruState),
	375	VMSTATE_UINT8(atr_length, PassthruState),
	376	VMSTATE_END_OF_LIST()
	377	}
	378	};
	379
39bffca2 AL	380	static Property passthru_card_properties[] = {
	381	DEFINE_PROP_CHR("chardev", PassthruState, cs),
	382	DEFINE_PROP_UINT8("debug", PassthruState, debug, 0),
	383	DEFINE_PROP_END_OF_LIST(),
	384	};
	385
ba7c0520 AL	386	static void passthru_class_initfn(ObjectClass klass, void data)
ba7c0520 AL	387	{
39bffca2	388	DeviceClass *dc = DEVICE_CLASS(klass);
ba7c0520 AL	389	CCIDCardClass *cc = CCID_CARD_CLASS(klass);
	390
	391	cc->initfn = passthru_initfn;
	392	cc->exitfn = passthru_exitfn;
	393	cc->get_atr = passthru_get_atr;
	394	cc->apdu_from_guest = passthru_apdu_from_guest;
125ee0ed	395	set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
39bffca2 AL	396	dc->desc = "passthrough smartcard";
	397	dc->vmsd = &passthru_vmstate;
	398	dc->props = passthru_card_properties;
ba7c0520 AL	399	}
ba7c0520 AL	400
8c43a6f0	401	static const TypeInfo passthru_card_info = {
39bffca2 AL	402	.name = PASSTHRU_DEV_NAME,
	403	.parent = TYPE_CCID_CARD,
	404	.instance_size = sizeof(PassthruState),
	405	.class_init = passthru_class_initfn,
edbb2136 AL	406	};
edbb2136 AL	407
83f7d43a	408	static void ccid_card_passthru_register_types(void)
edbb2136	409	{
39bffca2	410	type_register_static(&passthru_card_info);
edbb2136 AL	411	}
edbb2136 AL	412
83f7d43a	413	type_init(ccid_card_passthru_register_types)