diff options
Diffstat (limited to 'hw/usb/dev-smartcard-reader.c')
| -rw-r--r-- | hw/usb/dev-smartcard-reader.c | 1365 |
1 files changed, 1365 insertions, 0 deletions
diff --git a/hw/usb/dev-smartcard-reader.c b/hw/usb/dev-smartcard-reader.c new file mode 100644 index 0000000..8e66675 --- /dev/null +++ b/hw/usb/dev-smartcard-reader.c @@ -0,0 +1,1365 @@ +/* + * 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_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) |