mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-09 17:10:17 +00:00
143 lines
4.1 KiB
C
143 lines
4.1 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __FW_SIGNATURES_H__
|
|
#define __FW_SIGNATURES_H__
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include "secbool.h"
|
|
|
|
extern const uint32_t FIRMWARE_MAGIC_NEW; // TRZF
|
|
|
|
#define SIG_OK 0x5A3CA5C3
|
|
#define SIG_FAIL 0x00000000
|
|
|
|
bool firmware_present_old(void);
|
|
int signatures_old_ok(void);
|
|
|
|
// we use the same structure as T2 firmware header
|
|
// but we don't use the field sig
|
|
// and rather introduce fields sig1, sig2, sig3
|
|
// immediately following the chunk hashes
|
|
|
|
typedef struct {
|
|
uint32_t magic;
|
|
uint32_t hdrlen;
|
|
uint32_t expiry;
|
|
uint32_t codelen;
|
|
uint32_t version;
|
|
uint32_t fix_version;
|
|
uint32_t hw_model;
|
|
uint8_t hw_revision;
|
|
uint8_t monotonic;
|
|
uint8_t __reserved1[2];
|
|
uint8_t hashes[512];
|
|
uint8_t sig1[64];
|
|
uint8_t sig2[64];
|
|
uint8_t sig3[64];
|
|
uint8_t sigindex1;
|
|
uint8_t sigindex2;
|
|
uint8_t sigindex3;
|
|
uint8_t __reserved2[220];
|
|
uint8_t __sigmask;
|
|
uint8_t __sig[64];
|
|
} __attribute__((packed)) image_header;
|
|
|
|
#define FW_CHUNK_SIZE 65536
|
|
|
|
/**
|
|
* Check if firmware with FIRMWARE_MAGIC_NEW is installed
|
|
* @return true if magic present with some size checks
|
|
*/
|
|
bool firmware_present_new(void);
|
|
|
|
/**
|
|
* Compute fingerprint for given header. Fingerprint is done
|
|
* from header that has signature and sigindex fields zeroed.
|
|
*
|
|
* The "v2" scheme is used. This is what is shown as firmware
|
|
* fingerprint on device.
|
|
*
|
|
* @param hdr header
|
|
* @param hash store resulting hash here
|
|
*/
|
|
void compute_firmware_fingerprint(const image_header *hdr, uint8_t hash[32]);
|
|
|
|
/**
|
|
* Compute fingerprint for given header. Fingerprint is done
|
|
* from header that has signature and sigindex fields zeroed.
|
|
*
|
|
* Then it's prefixed using the SignMessage/VerifyMessage method
|
|
* as described here:
|
|
*
|
|
* https://github.com/trezor/trezor-firmware/issues/2513
|
|
*
|
|
* @param hdr header
|
|
* @param hash store resulting hash here
|
|
*/
|
|
void compute_firmware_fingerprint_for_verifymessage(const image_header *hdr,
|
|
uint8_t hash[32]);
|
|
|
|
/**
|
|
* Check if header is signed by v2 or v3 scheme based on `use_verifymessage`.
|
|
*
|
|
* Both are 3-of-5 scheme, where 3 signatures specified by sigindex fields
|
|
* must match corresponding secp256k1 pubkey.
|
|
*
|
|
* @param hdr header to check
|
|
* @param store_fingerprint if non-NULL, store hash computed with chosen method
|
|
* here
|
|
* @param use_verifymessage false - use v2 signature scheme, true - use v3
|
|
* SignMessage/VerifyMessage scheme
|
|
* @return SIG_OK or SIG_FAIL
|
|
*/
|
|
int signatures_ok(const image_header *hdr, uint8_t store_fingerprint[32],
|
|
secbool use_verifymessage);
|
|
|
|
/**
|
|
* Check if either v2 or v3 signature of header is valid.
|
|
*
|
|
* Stored fingerprint is the "of v2 scheme" which we still display as hash
|
|
* and use as "firmware hash".
|
|
*
|
|
* @param hdr header to check
|
|
* @param store_fingerprint if non-NULL, store v2 fingerprint here (not v3)
|
|
* @return SIG_OK or SIG_FAIL
|
|
*/
|
|
int signatures_match(const image_header *hdr, uint8_t store_fingerprint[32]);
|
|
|
|
/**
|
|
* Check hashes of FW chunks according to what header says they should be.
|
|
* @param hdr header with chunk hashes
|
|
* @return SIG_OK or SIG_FAIL
|
|
*/
|
|
int check_firmware_hashes(const image_header *hdr);
|
|
|
|
/**
|
|
* Check that block of memory is zeroed. Not constant-time.
|
|
*
|
|
* @param src start pointer
|
|
* @param len length in bytes
|
|
* @return 0 for false or 1 for true
|
|
*/
|
|
int mem_is_empty(const uint8_t *src, uint32_t len);
|
|
|
|
#endif
|