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trezor-firmware/tests/fido_tests/u2f-tests-hid/u2f.h
2019-09-12 17:50:17 +02:00

98 lines
2.0 KiB
C

// Copyright 2014 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#ifndef __U2F_H_INCLUDED__
#define __U2F_H_INCLUDED__
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __NO_PRAGMA_PACK
#pragma pack(push, 1)
#endif
// General constants
#define P256_SCALAR_SIZE 32 // nistp256 in bytes
#define P256_POINT_SIZE ((P256_SCALAR_SIZE * 2) + 1)
#define MAX_ECDSA_SIG_SIZE 72 // asn1 DER format
#define MAX_KH_SIZE 128 // key handle
#define MAX_CERT_SIZE 2048 // attestation certificate
#define U2F_APPID_SIZE 32
#define U2F_NONCE_SIZE 32
#define UNCOMPRESSED_POINT 0x04
typedef struct {
uint8_t format;
uint8_t x[P256_SCALAR_SIZE];
uint8_t y[P256_SCALAR_SIZE];
} P256_POINT;
// U2Fv2 instructions
#define U2F_INS_REGISTER 0x01
#define U2F_INS_AUTHENTICATE 0x02
#define U2F_INS_VERSION 0x03
// U2F_REGISTER instruction defines
#define U2F_REGISTER_ID 0x05 // magic constant
#define U2F_REGISTER_HASH_ID 0x00 // magic constant
typedef struct {
uint8_t nonce[U2F_NONCE_SIZE];
uint8_t appId[U2F_APPID_SIZE];
} U2F_REGISTER_REQ;
typedef struct {
uint8_t registerId;
P256_POINT pubKey;
uint8_t keyHandleLen;
uint8_t keyHandleCertSig[
MAX_KH_SIZE +
MAX_CERT_SIZE +
MAX_ECDSA_SIG_SIZE];
} U2F_REGISTER_RESP;
// U2F_AUTHENTICATE instruction defines
// Authentication parameter byte
#define U2F_AUTH_ENFORCE 0x03 // Require user presence
#define U2F_AUTH_CHECK_ONLY 0x07 // Test but do not consume
typedef struct {
uint8_t nonce[U2F_NONCE_SIZE];
uint8_t appId[U2F_APPID_SIZE];
uint8_t keyHandleLen;
uint8_t keyHandle[MAX_KH_SIZE];
} U2F_AUTHENTICATE_REQ;
// Flags values
#define U2F_TOUCHED 0x01
#define U2F_ALTERNATE_INTERFACE 0x02
typedef struct {
uint8_t flags;
uint32_t ctr;
uint8_t sig[MAX_ECDSA_SIG_SIZE];
} U2F_AUTHENTICATE_RESP;
#ifndef __NO_PRAGMA_PACK
#pragma pack(pop)
#endif
#ifdef __cplusplus
}
#endif
#endif // __U2F_H_INCLUDED__