125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*
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* Copyright (C) 2018 SoloKeys, Inc. <https://solokeys.com/>
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*
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* This file is part of Solo.
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*
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* Solo is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Solo is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Solo. If not, see <https://www.gnu.org/licenses/>
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*
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* This code is available under licenses for commercial use.
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* Please contact SoloKeys for more information.
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*/
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#ifndef _U2F_H_
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#define _U2F_H_
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#include <stdint.h>
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#include "ctap.h"
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#define U2F_EC_FMT_UNCOMPRESSED 0x04
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#define U2F_EC_POINT_SIZE 32
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#define U2F_EC_PUBKEY_SIZE 65
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#define U2F_APDU_SIZE 7
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#define U2F_CHALLENGE_SIZE 32
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#define U2F_APPLICATION_SIZE 32
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#define U2F_KEY_HANDLE_TAG_SIZE 16
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#define U2F_KEY_HANDLE_KEY_SIZE 32
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#define U2F_KEY_HANDLE_SIZE (U2F_KEY_HANDLE_KEY_SIZE+U2F_KEY_HANDLE_TAG_SIZE)
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#define U2F_REGISTER_REQUEST_SIZE (U2F_CHALLENGE_SIZE+U2F_APPLICATION_SIZE)
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#define U2F_MAX_REQUEST_PAYLOAD (1 + U2F_CHALLENGE_SIZE+U2F_APPLICATION_SIZE + 1 + U2F_KEY_HANDLE_SIZE)
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// U2F native commands
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#define U2F_REGISTER 0x01
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#define U2F_AUTHENTICATE 0x02
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#define U2F_VERSION 0x03
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#define U2F_VENDOR_FIRST 0xc0
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#define U2F_VENDOR_LAST 0xff
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// U2F_CMD_REGISTER command defines
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#define U2F_REGISTER_ID 0x05
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#define U2F_REGISTER_HASH_ID 0x00
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// U2F Authenticate
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#define U2F_AUTHENTICATE_CHECK 0x7
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#define U2F_AUTHENTICATE_SIGN 0x3
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// Command status responses
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#define U2F_SW_NO_ERROR 0x9000
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#define U2F_SW_WRONG_DATA 0x6984
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#define U2F_SW_CONDITIONS_NOT_SATISFIED 0x6985
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#define U2F_SW_INS_NOT_SUPPORTED 0x6d00
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#define U2F_SW_WRONG_LENGTH 0x6700
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#define U2F_SW_CLASS_NOT_SUPPORTED 0x6E00
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#define U2F_SW_WRONG_PAYLOAD 0x6a80
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#define U2F_SW_INSUFFICIENT_MEMORY 0x9210
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// Delay in milliseconds to wait for user input
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#define U2F_MS_USER_INPUT_WAIT 3000
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struct u2f_request_apdu
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{
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uint8_t cla;
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uint8_t ins;
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uint8_t p1;
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uint8_t p2;
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uint8_t LC1;
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uint8_t LC2;
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uint8_t LC3;
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uint8_t payload[U2F_MAX_REQUEST_PAYLOAD];
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};
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struct u2f_ec_point
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{
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uint8_t fmt;
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uint8_t x[U2F_EC_POINT_SIZE];
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uint8_t y[U2F_EC_POINT_SIZE];
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};
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struct u2f_register_request
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{
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uint8_t chal[U2F_CHALLENGE_SIZE];
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uint8_t app[U2F_APPLICATION_SIZE];
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};
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struct u2f_key_handle
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{
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uint8_t tag[U2F_KEY_HANDLE_TAG_SIZE];
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uint8_t key[U2F_KEY_HANDLE_KEY_SIZE];
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};
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struct u2f_authenticate_request
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{
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uint8_t chal[U2F_CHALLENGE_SIZE];
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uint8_t app[U2F_APPLICATION_SIZE];
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uint8_t khl;
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struct u2f_key_handle kh;
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};
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// u2f_request send a U2F message to U2F protocol
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// @req U2F message
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void u2f_request(struct u2f_request_apdu* req, CTAP_RESPONSE * resp, bool fromNFC);
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int8_t u2f_response_writeback(const uint8_t * buf, uint16_t len);
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void u2f_reset_response();
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void u2f_set_writeback_buffer(CTAP_RESPONSE * resp);
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int16_t u2f_version();
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#endif /* U2F_H_ */
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