/** * Copyright FIDO Alliance, 2017 * * Licensed under CC-BY: * https://creativecommons.org/licenses/by/4.0/legalcode * * Editor: Jakob Ehrensvard, Yubico, jakob@yubico.com */ #ifndef __U2FHID_H_INCLUDED__ #define __U2FHID_H_INCLUDED__ #ifdef _MSC_VER // Windows typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned int uint32_t; typedef unsigned long int uint64_t; #else #include <stdint.h> #endif #ifdef __cplusplus extern "C" { #endif // Size of HID reports #define HID_RPT_SIZE 64 // Default size of raw HID report // Frame layout - command- and continuation frames #define CID_BROADCAST 0xffffffff // Broadcast channel id #define TYPE_MASK 0x80 // Frame type mask #define TYPE_INIT 0x80 // Initial frame identifier #define TYPE_CONT 0x00 // Continuation frame identifier typedef struct __attribute__((packed)) { uint32_t cid; // Channel identifier union __attribute__((packed)) { uint8_t type; // Frame type - b7 defines type struct __attribute__((packed)) { uint8_t cmd; // Command - b7 set uint8_t bcnth; // Message byte count - high part uint8_t bcntl; // Message byte count - low part uint8_t data[HID_RPT_SIZE - 7]; // Data payload } init; struct __attribute__((packed)) { uint8_t seq; // Sequence number - b7 cleared uint8_t data[HID_RPT_SIZE - 5]; // Data payload } cont; }; } U2FHID_FRAME; #define FRAME_TYPE(f) ((f).type & TYPE_MASK) #define FRAME_CMD(f) ((f).init.cmd & ~TYPE_MASK) #define MSG_LEN(f) ((f).init.bcnth*256 + (f).init.bcntl) #define FRAME_SEQ(f) ((f).cont.seq & ~TYPE_MASK) // HID usage- and usage-page definitions #define FIDO_USAGE_PAGE 0xf1d0 // FIDO alliance HID usage page #define FIDO_USAGE_U2FHID 0x01 // U2FHID usage for top-level collection #define FIDO_USAGE_DATA_IN 0x20 // Raw IN data report #define FIDO_USAGE_DATA_OUT 0x21 // Raw OUT data report // General constants #define U2FHID_IF_VERSION 2 // Current interface implementation version #define U2FHID_TRANS_TIMEOUT 3000 // Default message timeout in ms // U2FHID native commands #define U2FHID_PING (TYPE_INIT | 0x01) // Echo data through local processor only #define U2FHID_MSG (TYPE_INIT | 0x03) // Send U2F message frame #define U2FHID_LOCK (TYPE_INIT | 0x04) // Send lock channel command #define U2FHID_INIT (TYPE_INIT | 0x06) // Channel initialization #define U2FHID_WINK (TYPE_INIT | 0x08) // Send device identification wink #define U2FHID_SYNC (TYPE_INIT | 0x3c) // Protocol resync command #define U2FHID_ERROR (TYPE_INIT | 0x3f) // Error response #define U2FHID_VENDOR_FIRST (TYPE_INIT | 0x40) // First vendor defined command #define U2FHID_VENDOR_LAST (TYPE_INIT | 0x7f) // Last vendor defined command // U2FHID_INIT command defines #define INIT_NONCE_SIZE 8 // Size of channel initialization challenge #define CAPFLAG_WINK 0x01 // Device supports WINK command #define CAPFLAG_LOCK 0x02 // Device supports LOCK command typedef struct __attribute__((packed)) { uint8_t nonce[INIT_NONCE_SIZE]; // Client application nonce } U2FHID_INIT_REQ; typedef struct __attribute__((packed)) { uint8_t nonce[INIT_NONCE_SIZE]; // Client application nonce uint32_t cid; // Channel identifier uint8_t versionInterface; // Interface version uint8_t versionMajor; // Major version number uint8_t versionMinor; // Minor version number uint8_t versionBuild; // Build version number uint8_t capFlags; // Capabilities flags } U2FHID_INIT_RESP; // U2FHID_SYNC command defines typedef struct __attribute__((packed)) { uint8_t nonce; // Client application nonce } U2FHID_SYNC_REQ; typedef struct __attribute__((packed)) { uint8_t nonce; // Client application nonce } U2FHID_SYNC_RESP; // Low-level error codes. Return as negatives. #define ERR_NONE 0x00 // No error #define ERR_INVALID_CMD 0x01 // Invalid command #define ERR_INVALID_PAR 0x02 // Invalid parameter #define ERR_INVALID_LEN 0x03 // Invalid message length #define ERR_INVALID_SEQ 0x04 // Invalid message sequencing #define ERR_MSG_TIMEOUT 0x05 // Message has timed out #define ERR_CHANNEL_BUSY 0x06 // Channel busy #define ERR_LOCK_REQUIRED 0x0a // Command requires channel lock #define ERR_INVALID_CID 0x0b // Message on CID 0 #define ERR_OTHER 0x7f // Other unspecified error #ifdef __cplusplus } #endif #endif // __U2FHID_H_INCLUDED__