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qemu-e2k/hw/usb/dev-smartcard-reader.c
Gerd Hoffmann 9d55d1adc8 usb: add serial number generator 
This patch adds a function which creates unique serial numbers for usb
devices and puts it into use.  Windows guests tend to become unhappy if
they find two identical usb devices in the system.  Effects range from
non-functional devices (with yellow exclamation mark in device manager)
to BSODs.  Handing out unique serial numbers to devices fixes this.

With this patch applied almost all emulated devices get a generated,
unique serial number.  There are two exceptions:

 * usb-storage devices will prefer a user-specified serial number
   and will only get a generated number in case the serial property
   is unset.
 * usb-hid devices keep the fixed serial number "42" as it is used
   to signal "remote wakeup actually works".
   See commit 7b074a22da

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-04-26 12:21:17 +02:00

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/*
* Copyright (C) 2011 Red Hat, Inc.
*
* CCID Device emulation
*
* Written by Alon Levy, with contributions from Robert Relyea.
*
* Based on usb-serial.c, see its copyright and attributions below.
*
* 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.
* ------- (original copyright & attribution for usb-serial.c below) --------
* Copyright (c) 2006 CodeSourcery.
* Copyright (c) 2008 Samuel Thibault <samuel.thibault@ens-lyon.org>
* Written by Paul Brook, reused for FTDI by Samuel Thibault,
*/
/*
* References:
*
* CCID Specification Revision 1.1 April 22nd 2005
* "Universal Serial Bus, Device Class: Smart Card"
* Specification for Integrated Circuit(s) Cards Interface Devices
*
* Endianness note: from the spec (1.3)
* "Fields that are larger than a byte are stored in little endian"
*
* KNOWN BUGS
* 1. remove/insert can sometimes result in removed state instead of inserted.
* This is a result of the following:
* symptom: dmesg shows ERMOTEIO (-121), pcscd shows -99. This can happen
* when a short packet is sent, as seen in uhci-usb.c, resulting from a urb
* from the guest requesting SPD and us returning a smaller packet.
* Not sure which messages trigger this.
*/
#include "qemu-common.h"
#include "qemu-error.h"
#include "hw/usb.h"
#include "hw/usb/desc.h"
#include "monitor.h"
#include "hw/ccid.h"
#define DPRINTF(s, lvl, fmt, ...) \
do { \
if (lvl <= s->debug) { \
printf("usb-ccid: " fmt , ## __VA_ARGS__); \
} \
} while (0)
#define D_WARN 1
#define D_INFO 2
#define D_MORE_INFO 3
#define D_VERBOSE 4
#define CCID_DEV_NAME "usb-ccid"
/*
* The two options for variable sized buffers:
* make them constant size, for large enough constant,
* or handle the migration complexity - VMState doesn't handle this case.
* sizes are expected never to be exceeded, unless guest misbehaves.
*/
#define BULK_OUT_DATA_SIZE 65536
#define PENDING_ANSWERS_NUM 128
#define BULK_IN_BUF_SIZE 384
#define BULK_IN_PENDING_NUM 8
#define InterfaceOutClass \
((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE)<<8)
#define InterfaceInClass \
((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE)<<8)
#define CCID_MAX_PACKET_SIZE 64
#define CCID_CONTROL_ABORT 0x1
#define CCID_CONTROL_GET_CLOCK_FREQUENCIES 0x2
#define CCID_CONTROL_GET_DATA_RATES 0x3
#define CCID_PRODUCT_DESCRIPTION "QEMU USB CCID"
#define CCID_VENDOR_DESCRIPTION "QEMU " QEMU_VERSION
#define CCID_INTERFACE_NAME "CCID Interface"
#define CCID_SERIAL_NUMBER_STRING "1"
/*
* Using Gemplus Vendor and Product id
* Effect on various drivers:
* usbccid.sys (winxp, others untested) is a class driver so it doesn't care.
* linux has a number of class drivers, but openct filters based on
* vendor/product (/etc/openct.conf under fedora), hence Gemplus.
*/
#define CCID_VENDOR_ID 0x08e6
#define CCID_PRODUCT_ID 0x4433
#define CCID_DEVICE_VERSION 0x0000
/*
* BULK_OUT messages from PC to Reader
* Defined in CCID Rev 1.1 6.1 (page 26)
*/
#define CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOn 0x62
#define CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOff 0x63
#define CCID_MESSAGE_TYPE_PC_to_RDR_GetSlotStatus 0x65
#define CCID_MESSAGE_TYPE_PC_to_RDR_XfrBlock 0x6f
#define CCID_MESSAGE_TYPE_PC_to_RDR_GetParameters 0x6c
#define CCID_MESSAGE_TYPE_PC_to_RDR_ResetParameters 0x6d
#define CCID_MESSAGE_TYPE_PC_to_RDR_SetParameters 0x61
#define CCID_MESSAGE_TYPE_PC_to_RDR_Escape 0x6b
#define CCID_MESSAGE_TYPE_PC_to_RDR_IccClock 0x6e
#define CCID_MESSAGE_TYPE_PC_to_RDR_T0APDU 0x6a
#define CCID_MESSAGE_TYPE_PC_to_RDR_Secure 0x69
#define CCID_MESSAGE_TYPE_PC_to_RDR_Mechanical 0x71
#define CCID_MESSAGE_TYPE_PC_to_RDR_Abort 0x72
#define CCID_MESSAGE_TYPE_PC_to_RDR_SetDataRateAndClockFrequency 0x73
/*
* BULK_IN messages from Reader to PC
* Defined in CCID Rev 1.1 6.2 (page 48)
*/
#define CCID_MESSAGE_TYPE_RDR_to_PC_DataBlock 0x80
#define CCID_MESSAGE_TYPE_RDR_to_PC_SlotStatus 0x81
#define CCID_MESSAGE_TYPE_RDR_to_PC_Parameters 0x82
#define CCID_MESSAGE_TYPE_RDR_to_PC_Escape 0x83
#define CCID_MESSAGE_TYPE_RDR_to_PC_DataRateAndClockFrequency 0x84
/*
* INTERRUPT_IN messages from Reader to PC
* Defined in CCID Rev 1.1 6.3 (page 56)
*/
#define CCID_MESSAGE_TYPE_RDR_to_PC_NotifySlotChange 0x50
#define CCID_MESSAGE_TYPE_RDR_to_PC_HardwareError 0x51
/*
* Endpoints for CCID - addresses are up to us to decide.
* To support slot insertion and removal we must have an interrupt in ep
* in addition we need a bulk in and bulk out ep
* 5.2, page 20
*/
#define CCID_INT_IN_EP 1
#define CCID_BULK_IN_EP 2
#define CCID_BULK_OUT_EP 3
/* bmSlotICCState masks */
#define SLOT_0_STATE_MASK 1
#define SLOT_0_CHANGED_MASK 2
/* Status codes that go in bStatus (see 6.2.6) */
enum {
ICC_STATUS_PRESENT_ACTIVE = 0,
ICC_STATUS_PRESENT_INACTIVE,
ICC_STATUS_NOT_PRESENT
};
enum {
COMMAND_STATUS_NO_ERROR = 0,
COMMAND_STATUS_FAILED,
COMMAND_STATUS_TIME_EXTENSION_REQUIRED
};
/* Error codes that go in bError (see 6.2.6) */
enum {
ERROR_CMD_NOT_SUPPORTED = 0,
ERROR_CMD_ABORTED = -1,
ERROR_ICC_MUTE = -2,
ERROR_XFR_PARITY_ERROR = -3,
ERROR_XFR_OVERRUN = -4,
ERROR_HW_ERROR = -5,
};
/* 6.2.6 RDR_to_PC_SlotStatus definitions */
enum {
CLOCK_STATUS_RUNNING = 0,
/*
* 0 - Clock Running, 1 - Clock stopped in State L, 2 - H,
* 3 - unknown state. rest are RFU
*/
};
typedef struct QEMU_PACKED CCID_Header {
uint8_t bMessageType;
uint32_t dwLength;
uint8_t bSlot;
uint8_t bSeq;
} CCID_Header;
typedef struct QEMU_PACKED CCID_BULK_IN {
CCID_Header hdr;
uint8_t bStatus; /* Only used in BULK_IN */
uint8_t bError; /* Only used in BULK_IN */
} CCID_BULK_IN;
typedef struct QEMU_PACKED CCID_SlotStatus {
CCID_BULK_IN b;
uint8_t bClockStatus;
} CCID_SlotStatus;
typedef struct QEMU_PACKED CCID_Parameter {
CCID_BULK_IN b;
uint8_t bProtocolNum;
uint8_t abProtocolDataStructure[0];
} CCID_Parameter;
typedef struct QEMU_PACKED CCID_DataBlock {
CCID_BULK_IN b;
uint8_t bChainParameter;
uint8_t abData[0];
} CCID_DataBlock;
/* 6.1.4 PC_to_RDR_XfrBlock */
typedef struct QEMU_PACKED CCID_XferBlock {
CCID_Header hdr;
uint8_t bBWI; /* Block Waiting Timeout */
uint16_t wLevelParameter; /* XXX currently unused */
uint8_t abData[0];
} CCID_XferBlock;
typedef struct QEMU_PACKED CCID_IccPowerOn {
CCID_Header hdr;
uint8_t bPowerSelect;
uint16_t abRFU;
} CCID_IccPowerOn;
typedef struct QEMU_PACKED CCID_IccPowerOff {
CCID_Header hdr;
uint16_t abRFU;
} CCID_IccPowerOff;
typedef struct QEMU_PACKED CCID_SetParameters {
CCID_Header hdr;
uint8_t bProtocolNum;
uint16_t abRFU;
uint8_t abProtocolDataStructure[0];
} CCID_SetParameters;
typedef struct CCID_Notify_Slot_Change {
uint8_t bMessageType; /* CCID_MESSAGE_TYPE_RDR_to_PC_NotifySlotChange */
uint8_t bmSlotICCState;
} CCID_Notify_Slot_Change;
/* used for DataBlock response to XferBlock */
typedef struct Answer {
uint8_t slot;
uint8_t seq;
} Answer;
/* pending BULK_IN messages */
typedef struct BulkIn {
uint8_t data[BULK_IN_BUF_SIZE];
uint32_t len;
uint32_t pos;
} BulkIn;
enum {
MIGRATION_NONE,
MIGRATION_MIGRATED,
};
typedef struct CCIDBus {
BusState qbus;
} CCIDBus;
#define MAX_PROTOCOL_SIZE 7
/*
* powered - defaults to true, changed by PowerOn/PowerOff messages
*/
typedef struct USBCCIDState {
USBDevice dev;
USBEndpoint *intr;
CCIDBus bus;
CCIDCardState *card;
BulkIn bulk_in_pending[BULK_IN_PENDING_NUM]; /* circular */
uint32_t bulk_in_pending_start;
uint32_t bulk_in_pending_end; /* first free */
uint32_t bulk_in_pending_num;
BulkIn *current_bulk_in;
uint8_t bulk_out_data[BULK_OUT_DATA_SIZE];
uint32_t bulk_out_pos;
uint64_t last_answer_error;
Answer pending_answers[PENDING_ANSWERS_NUM];
uint32_t pending_answers_start;
uint32_t pending_answers_end;
uint32_t pending_answers_num;
uint8_t bError;
uint8_t bmCommandStatus;
uint8_t bProtocolNum;
uint8_t abProtocolDataStructure[MAX_PROTOCOL_SIZE];
uint32_t ulProtocolDataStructureSize;
uint32_t state_vmstate;
uint32_t migration_target_ip;
uint16_t migration_target_port;
uint8_t migration_state;
uint8_t bmSlotICCState;
uint8_t powered;
uint8_t notify_slot_change;
uint8_t debug;
} USBCCIDState;
/*
* CCID Spec chapter 4: CCID uses a standard device descriptor per Chapter 9,
* "USB Device Framework", section 9.6.1, in the Universal Serial Bus
* Specification.
*
* This device implemented based on the spec and with an Athena Smart Card
* Reader as reference:
* 0dc3:1004 Athena Smartcard Solutions, Inc.
*/
static const uint8_t qemu_ccid_descriptor[] = {
/* Smart Card Device Class Descriptor */
0x36, /* u8 bLength; */
0x21, /* u8 bDescriptorType; Functional */
0x10, 0x01, /* u16 bcdCCID; CCID Specification Release Number. */
0x00, /*
* u8 bMaxSlotIndex; The index of the highest available
* slot on this device. All slots are consecutive starting
* at 00h.
*/
0x07, /* u8 bVoltageSupport; 01h - 5.0v, 02h - 3.0, 03 - 1.8 */
0x03, 0x00, /* u32 dwProtocols; RRRR PPPP. RRRR = 0000h.*/
0x00, 0x00, /* PPPP: 0001h = Protocol T=0, 0002h = Protocol T=1 */
/* u32 dwDefaultClock; in kHZ (0x0fa0 is 4 MHz) */
0xa0, 0x0f, 0x00, 0x00,
/* u32 dwMaximumClock; */
0x00, 0x00, 0x01, 0x00,
0x00, /* u8 bNumClockSupported; *
* 0 means just the default and max. */
/* u32 dwDataRate ;bps. 9600 == 00002580h */
0x80, 0x25, 0x00, 0x00,
/* u32 dwMaxDataRate ; 11520 bps == 0001C200h */
0x00, 0xC2, 0x01, 0x00,
0x00, /* u8 bNumDataRatesSupported; 00 means all rates between
* default and max */
/* u32 dwMaxIFSD; *
* maximum IFSD supported by CCID for protocol *
* T=1 (Maximum seen from various cards) */
0xfe, 0x00, 0x00, 0x00,
/* u32 dwSyncProtocols; 1 - 2-wire, 2 - 3-wire, 4 - I2C */
0x00, 0x00, 0x00, 0x00,
/* u32 dwMechanical; 0 - no special characteristics. */
0x00, 0x00, 0x00, 0x00,
/*
* u32 dwFeatures;
* 0 - No special characteristics
* + 2 Automatic parameter configuration based on ATR data
* + 4 Automatic activation of ICC on inserting
* + 8 Automatic ICC voltage selection
* + 10 Automatic ICC clock frequency change
* + 20 Automatic baud rate change
* + 40 Automatic parameters negotiation made by the CCID
* + 80 automatic PPS made by the CCID
* 100 CCID can set ICC in clock stop mode
* 200 NAD value other then 00 accepted (T=1 protocol)
* + 400 Automatic IFSD exchange as first exchange (T=1)
* One of the following only:
* + 10000 TPDU level exchanges with CCID
* 20000 Short APDU level exchange with CCID
* 40000 Short and Extended APDU level exchange with CCID
*
* + 100000 USB Wake up signaling supported on card
* insertion and removal. Must set bit 5 in bmAttributes
* in Configuration descriptor if 100000 is set.
*/
0xfe, 0x04, 0x11, 0x00,
/*
* u32 dwMaxCCIDMessageLength; For extended APDU in
* [261 + 10 , 65544 + 10]. Otherwise the minimum is
* wMaxPacketSize of the Bulk-OUT endpoint
*/
0x12, 0x00, 0x01, 0x00,
0xFF, /*
* u8 bClassGetResponse; Significant only for CCID that
* offers an APDU level for exchanges. Indicates the
* default class value used by the CCID when it sends a
* Get Response command to perform the transportation of
* an APDU by T=0 protocol
* FFh indicates that the CCID echos the class of the APDU.
*/
0xFF, /*
* u8 bClassEnvelope; EAPDU only. Envelope command for
* T=0
*/
0x00, 0x00, /*
* u16 wLcdLayout; XXYY Number of lines (XX) and chars per
* line for LCD display used for PIN entry. 0000 - no LCD
*/
0x01, /*
* u8 bPINSupport; 01h PIN Verification,
* 02h PIN Modification
*/
0x01, /* u8 bMaxCCIDBusySlots; */
};
enum {
STR_MANUFACTURER = 1,
STR_PRODUCT,
STR_SERIALNUMBER,
STR_INTERFACE,
};
static const USBDescStrings desc_strings = {
[STR_MANUFACTURER] = "QEMU " QEMU_VERSION,
[STR_PRODUCT] = "QEMU USB CCID",
[STR_SERIALNUMBER] = "1",
[STR_INTERFACE] = "CCID Interface",
};
static const USBDescIface desc_iface0 = {
.bInterfaceNumber = 0,
.bNumEndpoints = 3,
.bInterfaceClass = 0x0b,
.bInterfaceSubClass = 0x00,
.bInterfaceProtocol = 0x00,
.iInterface = STR_INTERFACE,
.ndesc = 1,
.descs = (USBDescOther[]) {
{
/* smartcard descriptor */
.data = qemu_ccid_descriptor,
},
},
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | CCID_INT_IN_EP,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.bInterval = 255,
.wMaxPacketSize = 64,
},{
.bEndpointAddress = USB_DIR_IN | CCID_BULK_IN_EP,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 64,
},{
.bEndpointAddress = USB_DIR_OUT | CCID_BULK_OUT_EP,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 64,
},
}
};
static const USBDescDevice desc_device = {
.bcdUSB = 0x0110,
.bMaxPacketSize0 = 64,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.bmAttributes = 0xe0,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface0,
},
},
};
static const USBDesc desc_ccid = {
.id = {
.idVendor = CCID_VENDOR_ID,
.idProduct = CCID_PRODUCT_ID,
.bcdDevice = CCID_DEVICE_VERSION,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT,
.iSerialNumber = STR_SERIALNUMBER,
},
.full = &desc_device,
.str = desc_strings,
};
static const uint8_t *ccid_card_get_atr(CCIDCardState *card, uint32_t *len)
{
CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
if (cc->get_atr) {
return cc->get_atr(card, len);
}
return NULL;
}
static void ccid_card_apdu_from_guest(CCIDCardState *card,
const uint8_t *apdu,
uint32_t len)
{
CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
if (cc->apdu_from_guest) {
cc->apdu_from_guest(card, apdu, len);
}
}
static int ccid_card_exitfn(CCIDCardState *card)
{
CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
if (cc->exitfn) {
return cc->exitfn(card);
}
return 0;
}
static int ccid_card_initfn(CCIDCardState *card)
{
CCIDCardClass *cc = CCID_CARD_GET_CLASS(card);
if (cc->initfn) {
return cc->initfn(card);
}
return 0;
}
static bool ccid_has_pending_answers(USBCCIDState *s)
{
return s->pending_answers_num > 0;
}
static void ccid_clear_pending_answers(USBCCIDState *s)
{
s->pending_answers_num = 0;
s->pending_answers_start = 0;
s->pending_answers_end = 0;
}
static void ccid_print_pending_answers(USBCCIDState *s)
{
Answer *answer;
int i, count;
DPRINTF(s, D_VERBOSE, "usb-ccid: pending answers:");
if (!ccid_has_pending_answers(s)) {
DPRINTF(s, D_VERBOSE, " empty\n");
return;
}
for (i = s->pending_answers_start, count = s->pending_answers_num ;
count > 0; count--, i++) {
answer = &s->pending_answers[i % PENDING_ANSWERS_NUM];
if (count == 1) {
DPRINTF(s, D_VERBOSE, "%d:%d\n", answer->slot, answer->seq);
} else {
DPRINTF(s, D_VERBOSE, "%d:%d,", answer->slot, answer->seq);
}
}
}
static void ccid_add_pending_answer(USBCCIDState *s, CCID_Header *hdr)
{
Answer *answer;
assert(s->pending_answers_num < PENDING_ANSWERS_NUM);
s->pending_answers_num++;
answer =
&s->pending_answers[(s->pending_answers_end++) % PENDING_ANSWERS_NUM];
answer->slot = hdr->bSlot;
answer->seq = hdr->bSeq;
ccid_print_pending_answers(s);
}
static void ccid_remove_pending_answer(USBCCIDState *s,
uint8_t *slot, uint8_t *seq)
{
Answer *answer;
assert(s->pending_answers_num > 0);
s->pending_answers_num--;
answer =
&s->pending_answers[(s->pending_answers_start++) % PENDING_ANSWERS_NUM];
*slot = answer->slot;
*seq = answer->seq;
ccid_print_pending_answers(s);
}
static void ccid_bulk_in_clear(USBCCIDState *s)
{
s->bulk_in_pending_start = 0;
s->bulk_in_pending_end = 0;
s->bulk_in_pending_num = 0;
}
static void ccid_bulk_in_release(USBCCIDState *s)
{
assert(s->current_bulk_in != NULL);
s->current_bulk_in->pos = 0;
s->current_bulk_in = NULL;
}
static void ccid_bulk_in_get(USBCCIDState *s)
{
if (s->current_bulk_in != NULL || s->bulk_in_pending_num == 0) {
return;
}
assert(s->bulk_in_pending_num > 0);
s->bulk_in_pending_num--;
s->current_bulk_in =
&s->bulk_in_pending[(s->bulk_in_pending_start++) % BULK_IN_PENDING_NUM];
}
static void *ccid_reserve_recv_buf(USBCCIDState *s, uint16_t len)
{
BulkIn *bulk_in;
DPRINTF(s, D_VERBOSE, "%s: QUEUE: reserve %d bytes\n", __func__, len);
/* look for an existing element */
if (len > BULK_IN_BUF_SIZE) {
DPRINTF(s, D_WARN, "usb-ccid.c: %s: len larger then max (%d>%d). "
"discarding message.\n",
__func__, len, BULK_IN_BUF_SIZE);
return NULL;
}
if (s->bulk_in_pending_num >= BULK_IN_PENDING_NUM) {
DPRINTF(s, D_WARN, "usb-ccid.c: %s: No free bulk_in buffers. "
"discarding message.\n", __func__);
return NULL;
}
bulk_in =
&s->bulk_in_pending[(s->bulk_in_pending_end++) % BULK_IN_PENDING_NUM];
s->bulk_in_pending_num++;
bulk_in->len = len;
return bulk_in->data;
}
static void ccid_reset(USBCCIDState *s)
{
ccid_bulk_in_clear(s);
ccid_clear_pending_answers(s);
}
static void ccid_detach(USBCCIDState *s)
{
ccid_reset(s);
}
static void ccid_handle_reset(USBDevice *dev)
{
USBCCIDState *s = DO_UPCAST(USBCCIDState, dev, dev);
DPRINTF(s, 1, "Reset\n");
ccid_reset(s);
}
static int ccid_handle_control(USBDevice *dev, USBPacket *p, int request,
int value, int index, int length, uint8_t *data)
{
USBCCIDState *s = DO_UPCAST(USBCCIDState, dev, dev);
int ret = 0;
DPRINTF(s, 1, "got control %x, value %x\n", request, value);
ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
if (ret >= 0) {
return ret;
}
switch (request) {
/* Class specific requests. */
case InterfaceOutClass | CCID_CONTROL_ABORT:
DPRINTF(s, 1, "ccid_control abort UNIMPLEMENTED\n");
ret = USB_RET_STALL;
break;
case InterfaceInClass | CCID_CONTROL_GET_CLOCK_FREQUENCIES:
DPRINTF(s, 1, "ccid_control get clock frequencies UNIMPLEMENTED\n");
ret = USB_RET_STALL;
break;
case InterfaceInClass | CCID_CONTROL_GET_DATA_RATES:
DPRINTF(s, 1, "ccid_control get data rates UNIMPLEMENTED\n");
ret = USB_RET_STALL;
break;
default:
DPRINTF(s, 1, "got unsupported/bogus control %x, value %x\n",
request, value);
ret = USB_RET_STALL;
break;
}
return ret;
}
static bool ccid_card_inserted(USBCCIDState *s)
{
return s->bmSlotICCState & SLOT_0_STATE_MASK;
}
static uint8_t ccid_card_status(USBCCIDState *s)
{
return ccid_card_inserted(s)
? (s->powered ?
ICC_STATUS_PRESENT_ACTIVE
: ICC_STATUS_PRESENT_INACTIVE
)
: ICC_STATUS_NOT_PRESENT;
}
static uint8_t ccid_calc_status(USBCCIDState *s)
{
/*
* page 55, 6.2.6, calculation of bStatus from bmICCStatus and
* bmCommandStatus
*/
uint8_t ret = ccid_card_status(s) | (s->bmCommandStatus << 6);
DPRINTF(s, D_VERBOSE, "status = %d\n", ret);
return ret;
}
static void ccid_reset_error_status(USBCCIDState *s)
{
s->bError = ERROR_CMD_NOT_SUPPORTED;
s->bmCommandStatus = COMMAND_STATUS_NO_ERROR;
}
static void ccid_write_slot_status(USBCCIDState *s, CCID_Header *recv)
{
CCID_SlotStatus *h = ccid_reserve_recv_buf(s, sizeof(CCID_SlotStatus));
if (h == NULL) {
return;
}
h->b.hdr.bMessageType = CCID_MESSAGE_TYPE_RDR_to_PC_SlotStatus;
h->b.hdr.dwLength = 0;
h->b.hdr.bSlot = recv->bSlot;
h->b.hdr.bSeq = recv->bSeq;
h->b.bStatus = ccid_calc_status(s);
h->b.bError = s->bError;
h->bClockStatus = CLOCK_STATUS_RUNNING;
ccid_reset_error_status(s);
}
static void ccid_write_parameters(USBCCIDState *s, CCID_Header *recv)
{
CCID_Parameter *h;
uint32_t len = s->ulProtocolDataStructureSize;
h = ccid_reserve_recv_buf(s, sizeof(CCID_Parameter) + len);
if (h == NULL) {
return;
}
h->b.hdr.bMessageType = CCID_MESSAGE_TYPE_RDR_to_PC_Parameters;
h->b.hdr.dwLength = 0;
h->b.hdr.bSlot = recv->bSlot;
h->b.hdr.bSeq = recv->bSeq;
h->b.bStatus = ccid_calc_status(s);
h->b.bError = s->bError;
h->bProtocolNum = s->bProtocolNum;
memcpy(h->abProtocolDataStructure, s->abProtocolDataStructure, len);
ccid_reset_error_status(s);
}
static void ccid_write_data_block(USBCCIDState *s, uint8_t slot, uint8_t seq,
const uint8_t *data, uint32_t len)
{
CCID_DataBlock *p = ccid_reserve_recv_buf(s, sizeof(*p) + len);
if (p == NULL) {
return;
}
p->b.hdr.bMessageType = CCID_MESSAGE_TYPE_RDR_to_PC_DataBlock;
p->b.hdr.dwLength = cpu_to_le32(len);
p->b.hdr.bSlot = slot;
p->b.hdr.bSeq = seq;
p->b.bStatus = ccid_calc_status(s);
p->b.bError = s->bError;
if (p->b.bError) {
DPRINTF(s, D_VERBOSE, "error %d", p->b.bError);
}
memcpy(p->abData, data, len);
ccid_reset_error_status(s);
}
static void ccid_write_data_block_answer(USBCCIDState *s,
const uint8_t *data, uint32_t len)
{
uint8_t seq;
uint8_t slot;
if (!ccid_has_pending_answers(s)) {
abort();
}
ccid_remove_pending_answer(s, &slot, &seq);
ccid_write_data_block(s, slot, seq, data, len);
}
static void ccid_write_data_block_atr(USBCCIDState *s, CCID_Header *recv)
{
const uint8_t *atr = NULL;
uint32_t len = 0;
if (s->card) {
atr = ccid_card_get_atr(s->card, &len);
}
ccid_write_data_block(s, recv->bSlot, recv->bSeq, atr, len);
}
static void ccid_set_parameters(USBCCIDState *s, CCID_Header *recv)
{
CCID_SetParameters *ph = (CCID_SetParameters *) recv;
uint32_t len = 0;
if ((ph->bProtocolNum & 3) == 0) {
len = 5;
}
if ((ph->bProtocolNum & 3) == 1) {
len = 7;
}
if (len == 0) {
s->bmCommandStatus = COMMAND_STATUS_FAILED;
s->bError = 7; /* Protocol invalid or not supported */
return;
}
s->bProtocolNum = ph->bProtocolNum;
memcpy(s->abProtocolDataStructure, ph->abProtocolDataStructure, len);
s->ulProtocolDataStructureSize = len;
DPRINTF(s, 1, "%s: using len %d\n", __func__, len);
}
/*
* must be 5 bytes for T=0, 7 bytes for T=1
* See page 52
*/
static const uint8_t abDefaultProtocolDataStructure[7] = {
0x77, 0x00, 0x00, 0x00, 0x00, 0xfe /*IFSC*/, 0x00 /*NAD*/ };
static void ccid_reset_parameters(USBCCIDState *s)
{
uint32_t len = sizeof(abDefaultProtocolDataStructure);
s->bProtocolNum = 1; /* T=1 */
s->ulProtocolDataStructureSize = len;
memcpy(s->abProtocolDataStructure, abDefaultProtocolDataStructure, len);
}
static void ccid_report_error_failed(USBCCIDState *s, uint8_t error)
{
s->bmCommandStatus = COMMAND_STATUS_FAILED;
s->bError = error;
}
/* NOTE: only a single slot is supported (SLOT_0) */
static void ccid_on_slot_change(USBCCIDState *s, bool full)
{
/* RDR_to_PC_NotifySlotChange, 6.3.1 page 56 */
uint8_t current = s->bmSlotICCState;
if (full) {
s->bmSlotICCState |= SLOT_0_STATE_MASK;
} else {
s->bmSlotICCState &= ~SLOT_0_STATE_MASK;
}
if (current != s->bmSlotICCState) {
s->bmSlotICCState |= SLOT_0_CHANGED_MASK;
}
s->notify_slot_change = true;
usb_wakeup(s->intr);
}
static void ccid_write_data_block_error(
USBCCIDState *s, uint8_t slot, uint8_t seq)
{
ccid_write_data_block(s, slot, seq, NULL, 0);
}
static void ccid_on_apdu_from_guest(USBCCIDState *s, CCID_XferBlock *recv)
{
uint32_t len;
if (ccid_card_status(s) != ICC_STATUS_PRESENT_ACTIVE) {
DPRINTF(s, 1,
"usb-ccid: not sending apdu to client, no card connected\n");
ccid_write_data_block_error(s, recv->hdr.bSlot, recv->hdr.bSeq);
return;
}
len = le32_to_cpu(recv->hdr.dwLength);
DPRINTF(s, 1, "%s: seq %d, len %d\n", __func__,
recv->hdr.bSeq, len);
ccid_add_pending_answer(s, (CCID_Header *)recv);
if (s->card) {
ccid_card_apdu_from_guest(s->card, recv->abData, len);
} else {
DPRINTF(s, D_WARN, "warning: discarded apdu\n");
}
}
/*
* Handle a single USB_TOKEN_OUT, return value returned to guest.
* Return value:
* 0 - all ok
* USB_RET_STALL - failed to handle packet
*/
static int ccid_handle_bulk_out(USBCCIDState *s, USBPacket *p)
{
CCID_Header *ccid_header;
if (p->iov.size + s->bulk_out_pos > BULK_OUT_DATA_SIZE) {
return USB_RET_STALL;
}
ccid_header = (CCID_Header *)s->bulk_out_data;
usb_packet_copy(p, s->bulk_out_data + s->bulk_out_pos, p->iov.size);
s->bulk_out_pos += p->iov.size;
if (p->iov.size == CCID_MAX_PACKET_SIZE) {
DPRINTF(s, D_VERBOSE,
"usb-ccid: bulk_in: expecting more packets (%zd/%d)\n",
p->iov.size, ccid_header->dwLength);
return 0;
}
if (s->bulk_out_pos < 10) {
DPRINTF(s, 1,
"%s: bad USB_TOKEN_OUT length, should be at least 10 bytes\n",
__func__);
} else {
DPRINTF(s, D_MORE_INFO, "%s %x\n", __func__, ccid_header->bMessageType);
switch (ccid_header->bMessageType) {
case CCID_MESSAGE_TYPE_PC_to_RDR_GetSlotStatus:
ccid_write_slot_status(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOn:
DPRINTF(s, 1, "PowerOn: %d\n",
((CCID_IccPowerOn *)(ccid_header))->bPowerSelect);
s->powered = true;
if (!ccid_card_inserted(s)) {
ccid_report_error_failed(s, ERROR_ICC_MUTE);
}
/* atr is written regardless of error. */
ccid_write_data_block_atr(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOff:
DPRINTF(s, 1, "PowerOff\n");
ccid_reset_error_status(s);
s->powered = false;
ccid_write_slot_status(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_XfrBlock:
ccid_on_apdu_from_guest(s, (CCID_XferBlock *)s->bulk_out_data);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_SetParameters:
ccid_reset_error_status(s);
ccid_set_parameters(s, ccid_header);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_ResetParameters:
ccid_reset_error_status(s);
ccid_reset_parameters(s);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_GetParameters:
ccid_reset_error_status(s);
ccid_write_parameters(s, ccid_header);
break;
default:
DPRINTF(s, 1,
"handle_data: ERROR: unhandled message type %Xh\n",
ccid_header->bMessageType);
/*
* The caller is expecting the device to respond, tell it we
* don't support the operation.
*/
ccid_report_error_failed(s, ERROR_CMD_NOT_SUPPORTED);
ccid_write_slot_status(s, ccid_header);
break;
}
}
s->bulk_out_pos = 0;
return 0;
}
static int ccid_bulk_in_copy_to_guest(USBCCIDState *s, USBPacket *p)
{
int ret = 0;
assert(p->iov.size > 0);
ccid_bulk_in_get(s);
if (s->current_bulk_in != NULL) {
ret = MIN(s->current_bulk_in->len - s->current_bulk_in->pos,
p->iov.size);
usb_packet_copy(p, s->current_bulk_in->data +
s->current_bulk_in->pos, ret);
s->current_bulk_in->pos += ret;
if (s->current_bulk_in->pos == s->current_bulk_in->len) {
ccid_bulk_in_release(s);
}
} else {
/* return when device has no data - usb 2.0 spec Table 8-4 */
ret = USB_RET_NAK;
}
if (ret > 0) {
DPRINTF(s, D_MORE_INFO,
"%s: %zd/%d req/act to guest (BULK_IN)\n",
__func__, p->iov.size, ret);
}
if (ret != USB_RET_NAK && ret < p->iov.size) {
DPRINTF(s, 1,
"%s: returning short (EREMOTEIO) %d < %zd\n",
__func__, ret, p->iov.size);
}
return ret;
}
static int ccid_handle_data(USBDevice *dev, USBPacket *p)
{
USBCCIDState *s = DO_UPCAST(USBCCIDState, dev, dev);
int ret = 0;
uint8_t buf[2];
switch (p->pid) {
case USB_TOKEN_OUT:
ret = ccid_handle_bulk_out(s, p);
break;
case USB_TOKEN_IN:
switch (p->ep->nr) {
case CCID_BULK_IN_EP:
if (!p->iov.size) {
ret = USB_RET_NAK;
} else {
ret = ccid_bulk_in_copy_to_guest(s, p);
}
break;
case CCID_INT_IN_EP:
if (s->notify_slot_change) {
/* page 56, RDR_to_PC_NotifySlotChange */
buf[0] = CCID_MESSAGE_TYPE_RDR_to_PC_NotifySlotChange;
buf[1] = s->bmSlotICCState;
usb_packet_copy(p, buf, 2);
ret = 2;
s->notify_slot_change = false;
s->bmSlotICCState &= ~SLOT_0_CHANGED_MASK;
DPRINTF(s, D_INFO,
"handle_data: int_in: notify_slot_change %X, "
"requested len %zd\n",
s->bmSlotICCState, p->iov.size);
}
break;
default:
DPRINTF(s, 1, "Bad endpoint\n");
ret = USB_RET_STALL;
break;
}
break;
default:
DPRINTF(s, 1, "Bad token\n");
ret = USB_RET_STALL;
break;
}
return ret;
}
static void ccid_handle_destroy(USBDevice *dev)
{
USBCCIDState *s = DO_UPCAST(USBCCIDState, dev, dev);
ccid_bulk_in_clear(s);
}
static void ccid_flush_pending_answers(USBCCIDState *s)
{
while (ccid_has_pending_answers(s)) {
ccid_write_data_block_answer(s, NULL, 0);
}
}
static Answer *ccid_peek_next_answer(USBCCIDState *s)
{
return s->pending_answers_num == 0
? NULL
: &s->pending_answers[s->pending_answers_start % PENDING_ANSWERS_NUM];
}
static struct BusInfo ccid_bus_info = {
.name = "ccid-bus",
.size = sizeof(CCIDBus),
.props = (Property[]) {
DEFINE_PROP_UINT32("slot", struct CCIDCardState, slot, 0),
DEFINE_PROP_END_OF_LIST(),
}
};
void ccid_card_send_apdu_to_guest(CCIDCardState *card,
uint8_t *apdu, uint32_t len)
{
USBCCIDState *s = DO_UPCAST(USBCCIDState, dev.qdev,
card->qdev.parent_bus->parent);
Answer *answer;
if (!ccid_has_pending_answers(s)) {
DPRINTF(s, 1, "CCID ERROR: got an APDU without pending answers\n");
return;
}
s->bmCommandStatus = COMMAND_STATUS_NO_ERROR;
answer = ccid_peek_next_answer(s);
if (answer == NULL) {
abort();
}
DPRINTF(s, 1, "APDU returned to guest %d (answer seq %d, slot %d)\n",
len, answer->seq, answer->slot);
ccid_write_data_block_answer(s, apdu, len);
}
void ccid_card_card_removed(CCIDCardState *card)
{
USBCCIDState *s =
DO_UPCAST(USBCCIDState, dev.qdev, card->qdev.parent_bus->parent);
ccid_on_slot_change(s, false);
ccid_flush_pending_answers(s);
ccid_reset(s);
}
int ccid_card_ccid_attach(CCIDCardState *card)
{
USBCCIDState *s =
DO_UPCAST(USBCCIDState, dev.qdev, card->qdev.parent_bus->parent);
DPRINTF(s, 1, "CCID Attach\n");
if (s->migration_state == MIGRATION_MIGRATED) {
s->migration_state = MIGRATION_NONE;
}
return 0;
}
void ccid_card_ccid_detach(CCIDCardState *card)
{
USBCCIDState *s =
DO_UPCAST(USBCCIDState, dev.qdev, card->qdev.parent_bus->parent);
DPRINTF(s, 1, "CCID Detach\n");
if (ccid_card_inserted(s)) {
ccid_on_slot_change(s, false);
}
ccid_detach(s);
}
void ccid_card_card_error(CCIDCardState *card, uint64_t error)
{
USBCCIDState *s =
DO_UPCAST(USBCCIDState, dev.qdev, card->qdev.parent_bus->parent);
s->bmCommandStatus = COMMAND_STATUS_FAILED;
s->last_answer_error = error;
DPRINTF(s, 1, "VSC_Error: %" PRIX64 "\n", s->last_answer_error);
/* TODO: these errors should be more verbose and propagated to the guest.*/
/*
* We flush all pending answers on CardRemove message in ccid-card-passthru,
* so check that first to not trigger abort
*/
if (ccid_has_pending_answers(s)) {
ccid_write_data_block_answer(s, NULL, 0);
}
}
void ccid_card_card_inserted(CCIDCardState *card)
{
USBCCIDState *s =
DO_UPCAST(USBCCIDState, dev.qdev, card->qdev.parent_bus->parent);
s->bmCommandStatus = COMMAND_STATUS_NO_ERROR;
ccid_flush_pending_answers(s);
ccid_on_slot_change(s, true);
}
static int ccid_card_exit(DeviceState *qdev)
{
int ret = 0;
CCIDCardState *card = CCID_CARD(qdev);
USBCCIDState *s =
DO_UPCAST(USBCCIDState, dev.qdev, card->qdev.parent_bus->parent);
if (ccid_card_inserted(s)) {
ccid_card_card_removed(card);
}
ret = ccid_card_exitfn(card);
s->card = NULL;
return ret;
}
static int ccid_card_init(DeviceState *qdev)
{
CCIDCardState *card = CCID_CARD(qdev);
USBCCIDState *s =
DO_UPCAST(USBCCIDState, dev.qdev, card->qdev.parent_bus->parent);
int ret = 0;
if (card->slot != 0) {
error_report("Warning: usb-ccid supports one slot, can't add %d",
card->slot);
return -1;
}
if (s->card != NULL) {
error_report("Warning: usb-ccid card already full, not adding");
return -1;
}
ret = ccid_card_initfn(card);
if (ret == 0) {
s->card = card;
}
return ret;
}
static int ccid_initfn(USBDevice *dev)
{
USBCCIDState *s = DO_UPCAST(USBCCIDState, dev, dev);
usb_desc_create_serial(dev);
usb_desc_init(dev);
qbus_create_inplace(&s->bus.qbus, &ccid_bus_info, &dev->qdev, NULL);
s->intr = usb_ep_get(dev, USB_TOKEN_IN, CCID_INT_IN_EP);
s->bus.qbus.allow_hotplug = 1;
s->card = NULL;
s->migration_state = MIGRATION_NONE;
s->migration_target_ip = 0;
s->migration_target_port = 0;
s->dev.speed = USB_SPEED_FULL;
s->dev.speedmask = USB_SPEED_MASK_FULL;
s->notify_slot_change = false;
s->powered = true;
s->pending_answers_num = 0;
s->last_answer_error = 0;
s->bulk_in_pending_start = 0;
s->bulk_in_pending_end = 0;
s->current_bulk_in = NULL;
ccid_reset_error_status(s);
s->bulk_out_pos = 0;
ccid_reset_parameters(s);
ccid_reset(s);
return 0;
}
static int ccid_post_load(void *opaque, int version_id)
{
USBCCIDState *s = opaque;
/*
* This must be done after usb_device_attach, which sets state to ATTACHED,
* while it must be DEFAULT in order to accept packets (like it is after
* reset, but reset will reset our addr and call our reset handler which
* may change state, and we don't want to do that when migrating).
*/
s->dev.state = s->state_vmstate;
return 0;
}
static void ccid_pre_save(void *opaque)
{
USBCCIDState *s = opaque;
s->state_vmstate = s->dev.state;
if (s->dev.attached) {
/*
* Migrating an open device, ignore reconnection CHR_EVENT to avoid an
* erroneous detach.
*/
s->migration_state = MIGRATION_MIGRATED;
}
}
static VMStateDescription bulk_in_vmstate = {
.name = "CCID BulkIn state",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_BUFFER(data, BulkIn),
VMSTATE_UINT32(len, BulkIn),
VMSTATE_UINT32(pos, BulkIn),
VMSTATE_END_OF_LIST()
}
};
static VMStateDescription answer_vmstate = {
.name = "CCID Answer state",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(slot, Answer),
VMSTATE_UINT8(seq, Answer),
VMSTATE_END_OF_LIST()
}
};
static VMStateDescription usb_device_vmstate = {
.name = "usb_device",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(addr, USBDevice),
VMSTATE_BUFFER(setup_buf, USBDevice),
VMSTATE_BUFFER(data_buf, USBDevice),
VMSTATE_END_OF_LIST()
}
};
static VMStateDescription ccid_vmstate = {
.name = CCID_DEV_NAME,
.version_id = 1,
.minimum_version_id = 1,
.post_load = ccid_post_load,
.pre_save = ccid_pre_save,
.fields = (VMStateField[]) {
VMSTATE_STRUCT(dev, USBCCIDState, 1, usb_device_vmstate, USBDevice),
VMSTATE_UINT8(debug, USBCCIDState),
VMSTATE_BUFFER(bulk_out_data, USBCCIDState),
VMSTATE_UINT32(bulk_out_pos, USBCCIDState),
VMSTATE_UINT8(bmSlotICCState, USBCCIDState),
VMSTATE_UINT8(powered, USBCCIDState),
VMSTATE_UINT8(notify_slot_change, USBCCIDState),
VMSTATE_UINT64(last_answer_error, USBCCIDState),
VMSTATE_UINT8(bError, USBCCIDState),
VMSTATE_UINT8(bmCommandStatus, USBCCIDState),
VMSTATE_UINT8(bProtocolNum, USBCCIDState),
VMSTATE_BUFFER(abProtocolDataStructure, USBCCIDState),
VMSTATE_UINT32(ulProtocolDataStructureSize, USBCCIDState),
VMSTATE_STRUCT_ARRAY(bulk_in_pending, USBCCIDState,
BULK_IN_PENDING_NUM, 1, bulk_in_vmstate, BulkIn),
VMSTATE_UINT32(bulk_in_pending_start, USBCCIDState),
VMSTATE_UINT32(bulk_in_pending_end, USBCCIDState),
VMSTATE_STRUCT_ARRAY(pending_answers, USBCCIDState,
PENDING_ANSWERS_NUM, 1, answer_vmstate, Answer),
VMSTATE_UINT32(pending_answers_num, USBCCIDState),
VMSTATE_UINT8(migration_state, USBCCIDState),
VMSTATE_UINT32(state_vmstate, USBCCIDState),
VMSTATE_END_OF_LIST()
}
};
static Property ccid_properties[] = {
DEFINE_PROP_UINT8("debug", USBCCIDState, debug, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void ccid_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->init = ccid_initfn;
uc->product_desc = "QEMU USB CCID";
uc->usb_desc = &desc_ccid;
uc->handle_reset = ccid_handle_reset;
uc->handle_control = ccid_handle_control;
uc->handle_data = ccid_handle_data;
uc->handle_destroy = ccid_handle_destroy;
dc->desc = "CCID Rev 1.1 smartcard reader";
dc->vmsd = &ccid_vmstate;
dc->props = ccid_properties;
}
static TypeInfo ccid_info = {
.name = CCID_DEV_NAME,
.parent = TYPE_USB_DEVICE,
.instance_size = sizeof(USBCCIDState),
.class_init = ccid_class_initfn,
};
static void ccid_card_class_init(ObjectClass *klass, void *data)
{
DeviceClass *k = DEVICE_CLASS(klass);
k->bus_info = &ccid_bus_info;
k->init = ccid_card_init;
k->exit = ccid_card_exit;
}
static TypeInfo ccid_card_type_info = {
.name = TYPE_CCID_CARD,
.parent = TYPE_DEVICE,
.instance_size = sizeof(CCIDCardState),
.abstract = true,
.class_size = sizeof(CCIDCardClass),
.class_init = ccid_card_class_init,
};
static void ccid_register_types(void)
{
type_register_static(&ccid_card_type_info);
type_register_static(&ccid_info);
usb_legacy_register(CCID_DEV_NAME, "ccid", NULL);
}
type_init(ccid_register_types)
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