mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-16 04:29:08 +00:00
98 lines
2.0 KiB
C
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__
|