mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-22 22:38:08 +00:00
786 lines
28 KiB
C
786 lines
28 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/>.
|
|
*/
|
|
|
|
#include "crypto.h"
|
|
#include <string.h>
|
|
#include "address.h"
|
|
#include "aes/aes.h"
|
|
#include "base58.h"
|
|
#include "bip32.h"
|
|
#include "cash_addr.h"
|
|
#include "coins.h"
|
|
#include "curves.h"
|
|
#include "hmac.h"
|
|
#include "layout.h"
|
|
#include "pbkdf2.h"
|
|
#include "secp256k1.h"
|
|
#include "segwit_addr.h"
|
|
#include "sha2.h"
|
|
|
|
#define PATH_MAX_ACCOUNT 100
|
|
#define PATH_MAX_CHANGE 1
|
|
#define PATH_MAX_ADDRESS_INDEX 1000000
|
|
|
|
// SLIP-44 hardened coin type for Bitcoin
|
|
#define SLIP44_BITCOIN 0x80000000
|
|
|
|
// SLIP-44 hardened coin type for all Testnet coins
|
|
#define SLIP44_TESTNET 0x80000001
|
|
|
|
uint32_t ser_length(uint32_t len, uint8_t *out) {
|
|
if (len < 253) {
|
|
out[0] = len & 0xFF;
|
|
return 1;
|
|
}
|
|
if (len < 0x10000) {
|
|
out[0] = 253;
|
|
out[1] = len & 0xFF;
|
|
out[2] = (len >> 8) & 0xFF;
|
|
return 3;
|
|
}
|
|
out[0] = 254;
|
|
out[1] = len & 0xFF;
|
|
out[2] = (len >> 8) & 0xFF;
|
|
out[3] = (len >> 16) & 0xFF;
|
|
out[4] = (len >> 24) & 0xFF;
|
|
return 5;
|
|
}
|
|
|
|
uint32_t ser_length_hash(Hasher *hasher, uint32_t len) {
|
|
if (len < 253) {
|
|
hasher_Update(hasher, (const uint8_t *)&len, 1);
|
|
return 1;
|
|
}
|
|
if (len < 0x10000) {
|
|
uint8_t d = 253;
|
|
hasher_Update(hasher, &d, 1);
|
|
hasher_Update(hasher, (const uint8_t *)&len, 2);
|
|
return 3;
|
|
}
|
|
uint8_t d = 254;
|
|
hasher_Update(hasher, &d, 1);
|
|
hasher_Update(hasher, (const uint8_t *)&len, 4);
|
|
return 5;
|
|
}
|
|
|
|
uint32_t deser_length(const uint8_t *in, uint32_t *out) {
|
|
if (in[0] < 253) {
|
|
*out = in[0];
|
|
return 1;
|
|
}
|
|
if (in[0] == 253) {
|
|
*out = in[1] + (in[2] << 8);
|
|
return 1 + 2;
|
|
}
|
|
if (in[0] == 254) {
|
|
*out = in[1] + (in[2] << 8) + (in[3] << 16) + ((uint32_t)in[4] << 24);
|
|
return 1 + 4;
|
|
}
|
|
*out = 0; // ignore 64 bit
|
|
return 1 + 8;
|
|
}
|
|
|
|
int sshMessageSign(HDNode *node, const uint8_t *message, size_t message_len,
|
|
uint8_t *signature) {
|
|
signature[0] = 0; // prefix: pad with zero, so all signatures are 65 bytes
|
|
return hdnode_sign(node, message, message_len, HASHER_SHA2, signature + 1,
|
|
NULL, NULL);
|
|
}
|
|
|
|
int gpgMessageSign(HDNode *node, const uint8_t *message, size_t message_len,
|
|
uint8_t *signature) {
|
|
signature[0] = 0; // prefix: pad with zero, so all signatures are 65 bytes
|
|
const curve_info *ed25519_curve_info = get_curve_by_name(ED25519_NAME);
|
|
if (ed25519_curve_info && node->curve == ed25519_curve_info) {
|
|
// GPG supports variable size digest for Ed25519 signatures
|
|
return hdnode_sign(node, message, message_len, 0, signature + 1, NULL,
|
|
NULL);
|
|
} else {
|
|
// Ensure 256-bit digest before proceeding
|
|
if (message_len != 32) {
|
|
return 1;
|
|
}
|
|
return hdnode_sign_digest(node, message, signature + 1, NULL, NULL);
|
|
}
|
|
}
|
|
|
|
int signifyMessageSign(HDNode *node, const uint8_t *message, size_t message_len,
|
|
uint8_t *signature) {
|
|
signature[0] = 0; // prefix: pad with zero, so all signatures are 65 bytes
|
|
const curve_info *ed25519_curve_info = get_curve_by_name(ED25519_NAME);
|
|
// only ed25519 is supported
|
|
if (!ed25519_curve_info || node->curve != ed25519_curve_info) {
|
|
return 1;
|
|
}
|
|
return hdnode_sign(node, message, message_len, 0, signature + 1, NULL, NULL);
|
|
}
|
|
|
|
static void cryptoMessageHash(const CoinInfo *coin, const uint8_t *message,
|
|
size_t message_len,
|
|
uint8_t hash[HASHER_DIGEST_LENGTH]) {
|
|
Hasher hasher = {0};
|
|
hasher_Init(&hasher, coin->curve->hasher_sign);
|
|
hasher_Update(&hasher, (const uint8_t *)coin->signed_message_header,
|
|
strlen(coin->signed_message_header));
|
|
uint8_t varint[5] = {0};
|
|
uint32_t l = ser_length(message_len, varint);
|
|
hasher_Update(&hasher, varint, l);
|
|
hasher_Update(&hasher, message, message_len);
|
|
hasher_Final(&hasher, hash);
|
|
}
|
|
|
|
int cryptoMessageSign(const CoinInfo *coin, HDNode *node,
|
|
InputScriptType script_type, const uint8_t *message,
|
|
size_t message_len, uint8_t *signature) {
|
|
uint8_t hash[HASHER_DIGEST_LENGTH] = {0};
|
|
cryptoMessageHash(coin, message, message_len, hash);
|
|
|
|
uint8_t pby = 0;
|
|
int result = hdnode_sign_digest(node, hash, signature + 1, &pby, NULL);
|
|
if (result == 0) {
|
|
switch (script_type) {
|
|
case InputScriptType_SPENDP2SHWITNESS:
|
|
// segwit-in-p2sh
|
|
signature[0] = 35 + pby;
|
|
break;
|
|
case InputScriptType_SPENDWITNESS:
|
|
// segwit
|
|
signature[0] = 39 + pby;
|
|
break;
|
|
default:
|
|
// p2pkh
|
|
signature[0] = 31 + pby;
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
int cryptoMessageVerify(const CoinInfo *coin, const uint8_t *message,
|
|
size_t message_len, const char *address,
|
|
const uint8_t *signature) {
|
|
// check for invalid signature prefix
|
|
if (signature[0] < 27 || signature[0] > 43) {
|
|
return 1;
|
|
}
|
|
|
|
uint8_t hash[HASHER_DIGEST_LENGTH] = {0};
|
|
cryptoMessageHash(coin, message, message_len, hash);
|
|
|
|
uint8_t recid = (signature[0] - 27) % 4;
|
|
bool compressed = signature[0] >= 31;
|
|
|
|
// check if signature verifies the digest and recover the public key
|
|
uint8_t pubkey[65] = {0};
|
|
if (ecdsa_recover_pub_from_sig(coin->curve->params, pubkey, signature + 1,
|
|
hash, recid) != 0) {
|
|
return 3;
|
|
}
|
|
// convert public key to compressed pubkey if necessary
|
|
if (compressed) {
|
|
pubkey[0] = 0x02 | (pubkey[64] & 1);
|
|
}
|
|
|
|
// check if the address is correct
|
|
uint8_t addr_raw[MAX_ADDR_RAW_SIZE] = {0};
|
|
uint8_t recovered_raw[MAX_ADDR_RAW_SIZE] = {0};
|
|
|
|
// p2pkh
|
|
if (signature[0] >= 27 && signature[0] <= 34) {
|
|
size_t len = 0;
|
|
if (coin->cashaddr_prefix) {
|
|
if (!cash_addr_decode(addr_raw, &len, coin->cashaddr_prefix, address)) {
|
|
return 2;
|
|
}
|
|
} else {
|
|
len = base58_decode_check(address, coin->curve->hasher_base58, addr_raw,
|
|
MAX_ADDR_RAW_SIZE);
|
|
}
|
|
ecdsa_get_address_raw(pubkey, coin->address_type,
|
|
coin->curve->hasher_pubkey, recovered_raw);
|
|
if (memcmp(recovered_raw, addr_raw, len) != 0 ||
|
|
len != address_prefix_bytes_len(coin->address_type) + 20) {
|
|
return 2;
|
|
}
|
|
} else
|
|
// segwit-in-p2sh
|
|
if (signature[0] >= 35 && signature[0] <= 38) {
|
|
size_t len = base58_decode_check(address, coin->curve->hasher_base58,
|
|
addr_raw, MAX_ADDR_RAW_SIZE);
|
|
ecdsa_get_address_segwit_p2sh_raw(pubkey, coin->address_type_p2sh,
|
|
coin->curve->hasher_pubkey,
|
|
recovered_raw);
|
|
if (memcmp(recovered_raw, addr_raw, len) != 0 ||
|
|
len != address_prefix_bytes_len(coin->address_type_p2sh) + 20) {
|
|
return 2;
|
|
}
|
|
} else
|
|
// segwit
|
|
if (signature[0] >= 39 && signature[0] <= 42) {
|
|
int witver = 0;
|
|
size_t len = 0;
|
|
if (!coin->bech32_prefix ||
|
|
!segwit_addr_decode(&witver, recovered_raw, &len, coin->bech32_prefix,
|
|
address)) {
|
|
return 4;
|
|
}
|
|
ecdsa_get_pubkeyhash(pubkey, coin->curve->hasher_pubkey, addr_raw);
|
|
if (memcmp(recovered_raw, addr_raw, len) != 0 || witver != 0 || len != 20) {
|
|
return 2;
|
|
}
|
|
} else {
|
|
return 4;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ECIES disabled
|
|
int cryptoMessageEncrypt(curve_point *pubkey, const uint8_t *msg, size_t
|
|
msg_size, bool display_only, uint8_t *nonce, size_t *nonce_len, uint8_t
|
|
*payload, size_t *payload_len, uint8_t *hmac, size_t *hmac_len, const uint8_t
|
|
*privkey, const uint8_t *address_raw)
|
|
{
|
|
if (privkey && address_raw) { // signing == true
|
|
HDNode node = {0};
|
|
payload[0] = display_only ? 0x81 : 0x01;
|
|
uint32_t l = ser_length(msg_size, payload + 1);
|
|
memcpy(payload + 1 + l, msg, msg_size);
|
|
memcpy(payload + 1 + l + msg_size, address_raw, 21);
|
|
hdnode_from_xprv(0, 0, 0, privkey, privkey, SECP256K1_NAME,
|
|
&node); if (cryptoMessageSign(&node, msg, msg_size, payload + 1 + l + msg_size +
|
|
21) != 0) { return 1;
|
|
}
|
|
*payload_len = 1 + l + msg_size + 21 + 65;
|
|
} else {
|
|
payload[0] = display_only ? 0x80 : 0x00;
|
|
uint32_t l = ser_length(msg_size, payload + 1);
|
|
memcpy(payload + 1 + l, msg, msg_size);
|
|
*payload_len = 1 + l + msg_size;
|
|
}
|
|
// generate random nonce
|
|
curve_point R = {0};
|
|
bignum256 k = {0};
|
|
if (generate_k_random(&secp256k1, &k) != 0) {
|
|
return 2;
|
|
}
|
|
// compute k*G
|
|
scalar_multiply(&secp256k1, &k, &R);
|
|
nonce[0] = 0x02 | (R.y.val[0] & 0x01);
|
|
bn_write_be(&R.x, nonce + 1);
|
|
*nonce_len = 33;
|
|
// compute shared secret
|
|
point_multiply(&secp256k1, &k, pubkey, &R);
|
|
uint8_t shared_secret[33] = {0};
|
|
shared_secret[0] = 0x02 | (R.y.val[0] & 0x01);
|
|
bn_write_be(&R.x, shared_secret + 1);
|
|
// generate keying bytes
|
|
uint8_t keying_bytes[80] = {0};
|
|
uint8_t salt[22 + 33] = {0};
|
|
memcpy(salt, "Bitcoin Secure Message", 22);
|
|
memcpy(salt + 22, nonce, 33);
|
|
pbkdf2_hmac_sha256(shared_secret, 33, salt, 22 + 33, 2048, keying_bytes,
|
|
80);
|
|
// encrypt payload
|
|
aes_encrypt_ctx ctx = {0};
|
|
aes_encrypt_key256(keying_bytes, &ctx);
|
|
aes_cfb_encrypt(payload, payload, *payload_len, keying_bytes + 64,
|
|
&ctx);
|
|
// compute hmac
|
|
uint8_t out[32] = {0};
|
|
hmac_sha256(keying_bytes + 32, 32, payload, *payload_len, out);
|
|
memcpy(hmac, out, 8);
|
|
*hmac_len = 8;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cryptoMessageDecrypt(curve_point *nonce, uint8_t *payload, size_t
|
|
payload_len, const uint8_t *hmac, size_t hmac_len, const uint8_t *privkey,
|
|
uint8_t *msg, size_t *msg_len, bool *display_only, bool *signing, uint8_t
|
|
*address_raw)
|
|
{
|
|
if (hmac_len != 8) {
|
|
return 1;
|
|
}
|
|
// compute shared secret
|
|
curve_point R = {0};
|
|
bignum256 k = {0};
|
|
bn_read_be(privkey, &k);
|
|
point_multiply(&secp256k1, &k, nonce, &R);
|
|
uint8_t shared_secret[33] = {0};
|
|
shared_secret[0] = 0x02 | (R.y.val[0] & 0x01);
|
|
bn_write_be(&R.x, shared_secret + 1);
|
|
// generate keying bytes
|
|
uint8_t keying_bytes[80] = {0};
|
|
uint8_t salt[22 + 33] = {0};
|
|
memcpy(salt, "Bitcoin Secure Message", 22);
|
|
salt[22] = 0x02 | (nonce->y.val[0] & 0x01);
|
|
bn_write_be(&(nonce->x), salt + 23);
|
|
pbkdf2_hmac_sha256(shared_secret, 33, salt, 22 + 33, 2048, keying_bytes,
|
|
80);
|
|
// compute hmac
|
|
uint8_t out[32] = {0};
|
|
hmac_sha256(keying_bytes + 32, 32, payload, payload_len, out);
|
|
if (memcmp(hmac, out, 8) != 0) {
|
|
return 2;
|
|
}
|
|
// decrypt payload
|
|
aes_encrypt_ctx ctx = {0};
|
|
aes_encrypt_key256(keying_bytes, &ctx);
|
|
aes_cfb_decrypt(payload, payload, payload_len, keying_bytes + 64, &ctx);
|
|
// check first byte
|
|
if (payload[0] != 0x00 && payload[0] != 0x01 && payload[0] != 0x80 &&
|
|
payload[0] != 0x81) { return 3;
|
|
}
|
|
*signing = payload[0] & 0x01;
|
|
*display_only = payload[0] & 0x80;
|
|
uint32_t l = 0; uint32_t o = 0;
|
|
l = deser_length(payload + 1, &o);
|
|
if (*signing) {
|
|
// FIXME: assumes a raw address is 21 bytes (also below).
|
|
if (1 + l + o + 21 + 65 != payload_len) {
|
|
return 4;
|
|
}
|
|
// FIXME: cryptoMessageVerify changed to take the address_type
|
|
as a parameter. if (cryptoMessageVerify(payload + 1 + l, o, payload + 1 + l + o,
|
|
payload + 1 + l + o + 21) != 0) { return 5;
|
|
}
|
|
memcpy(address_raw, payload + 1 + l + o, 21);
|
|
} else {
|
|
if (1 + l + o != payload_len) {
|
|
return 4;
|
|
}
|
|
}
|
|
memcpy(msg, payload + 1 + l, o);
|
|
*msg_len = o;
|
|
return 0;
|
|
}
|
|
*/
|
|
|
|
const HDNode *cryptoMultisigPubkey(const CoinInfo *coin,
|
|
const MultisigRedeemScriptType *multisig,
|
|
uint32_t index) {
|
|
const HDNodeType *node_ptr = NULL;
|
|
const uint32_t *address_n = NULL;
|
|
uint32_t address_n_count = 0;
|
|
if (multisig->nodes_count) { // use multisig->nodes
|
|
if (index >= multisig->nodes_count) {
|
|
return 0;
|
|
}
|
|
node_ptr = &(multisig->nodes[index]);
|
|
address_n = multisig->address_n;
|
|
address_n_count = multisig->address_n_count;
|
|
} else if (multisig->pubkeys_count) { // use multisig->pubkeys
|
|
if (index >= multisig->pubkeys_count) {
|
|
return 0;
|
|
}
|
|
node_ptr = &(multisig->pubkeys[index].node);
|
|
address_n = multisig->pubkeys[index].address_n;
|
|
address_n_count = multisig->pubkeys[index].address_n_count;
|
|
} else {
|
|
return 0;
|
|
}
|
|
if (node_ptr->chain_code.size != 32) return 0;
|
|
if (node_ptr->public_key.size != 33) return 0;
|
|
static HDNode node;
|
|
if (!hdnode_from_xpub(node_ptr->depth, node_ptr->child_num,
|
|
node_ptr->chain_code.bytes, node_ptr->public_key.bytes,
|
|
coin->curve_name, &node)) {
|
|
return 0;
|
|
}
|
|
layoutProgressUpdate(true);
|
|
for (uint32_t i = 0; i < address_n_count; i++) {
|
|
if (!hdnode_public_ckd(&node, address_n[i])) {
|
|
return 0;
|
|
}
|
|
layoutProgressUpdate(true);
|
|
}
|
|
return &node;
|
|
}
|
|
|
|
uint32_t cryptoMultisigPubkeyCount(const MultisigRedeemScriptType *multisig) {
|
|
return multisig->nodes_count ? multisig->nodes_count
|
|
: multisig->pubkeys_count;
|
|
}
|
|
|
|
int cryptoMultisigPubkeyIndex(const CoinInfo *coin,
|
|
const MultisigRedeemScriptType *multisig,
|
|
const uint8_t *pubkey) {
|
|
for (size_t i = 0; i < cryptoMultisigPubkeyCount(multisig); i++) {
|
|
const HDNode *pubnode = cryptoMultisigPubkey(coin, multisig, i);
|
|
if (pubnode && memcmp(pubnode->public_key, pubkey, 33) == 0) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
int cryptoMultisigFingerprint(const MultisigRedeemScriptType *multisig,
|
|
uint8_t *hash) {
|
|
static const HDNodeType *pubnodes[15], *swap;
|
|
const uint32_t n = cryptoMultisigPubkeyCount(multisig);
|
|
if (n < 1 || n > 15) {
|
|
return 0;
|
|
}
|
|
if (multisig->m < 1 || multisig->m > 15) {
|
|
return 0;
|
|
}
|
|
for (uint32_t i = 0; i < n; i++) {
|
|
if (multisig->nodes_count) { // use multisig->nodes
|
|
pubnodes[i] = &(multisig->nodes[i]);
|
|
} else if (multisig->pubkeys_count) { // use multisig->pubkeys
|
|
pubnodes[i] = &(multisig->pubkeys[i].node);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
for (uint32_t i = 0; i < n; i++) {
|
|
if (pubnodes[i]->public_key.size != 33) return 0;
|
|
if (pubnodes[i]->chain_code.size != 32) return 0;
|
|
}
|
|
// minsort according to pubkey
|
|
for (uint32_t i = 0; i < n - 1; i++) {
|
|
for (uint32_t j = n - 1; j > i; j--) {
|
|
if (memcmp(pubnodes[i]->public_key.bytes, pubnodes[j]->public_key.bytes,
|
|
33) > 0) {
|
|
swap = pubnodes[i];
|
|
pubnodes[i] = pubnodes[j];
|
|
pubnodes[j] = swap;
|
|
}
|
|
}
|
|
}
|
|
// hash sorted nodes
|
|
SHA256_CTX ctx = {0};
|
|
sha256_Init(&ctx);
|
|
sha256_Update(&ctx, (const uint8_t *)&(multisig->m), sizeof(uint32_t));
|
|
for (uint32_t i = 0; i < n; i++) {
|
|
sha256_Update(&ctx, (const uint8_t *)&(pubnodes[i]->depth),
|
|
sizeof(uint32_t));
|
|
sha256_Update(&ctx, (const uint8_t *)&(pubnodes[i]->fingerprint),
|
|
sizeof(uint32_t));
|
|
sha256_Update(&ctx, (const uint8_t *)&(pubnodes[i]->child_num),
|
|
sizeof(uint32_t));
|
|
sha256_Update(&ctx, pubnodes[i]->chain_code.bytes, 32);
|
|
sha256_Update(&ctx, pubnodes[i]->public_key.bytes, 33);
|
|
}
|
|
sha256_Update(&ctx, (const uint8_t *)&n, sizeof(uint32_t));
|
|
sha256_Final(&ctx, hash);
|
|
layoutProgressUpdate(true);
|
|
return 1;
|
|
}
|
|
|
|
int cryptoIdentityFingerprint(const IdentityType *identity, uint8_t *hash) {
|
|
SHA256_CTX ctx = {0};
|
|
sha256_Init(&ctx);
|
|
sha256_Update(&ctx, (const uint8_t *)&(identity->index), sizeof(uint32_t));
|
|
if (identity->has_proto && identity->proto[0]) {
|
|
sha256_Update(&ctx, (const uint8_t *)(identity->proto),
|
|
strlen(identity->proto));
|
|
sha256_Update(&ctx, (const uint8_t *)"://", 3);
|
|
}
|
|
if (identity->has_user && identity->user[0]) {
|
|
sha256_Update(&ctx, (const uint8_t *)(identity->user),
|
|
strlen(identity->user));
|
|
sha256_Update(&ctx, (const uint8_t *)"@", 1);
|
|
}
|
|
if (identity->has_host && identity->host[0]) {
|
|
sha256_Update(&ctx, (const uint8_t *)(identity->host),
|
|
strlen(identity->host));
|
|
}
|
|
if (identity->has_port && identity->port[0]) {
|
|
sha256_Update(&ctx, (const uint8_t *)":", 1);
|
|
sha256_Update(&ctx, (const uint8_t *)(identity->port),
|
|
strlen(identity->port));
|
|
}
|
|
if (identity->has_path && identity->path[0]) {
|
|
sha256_Update(&ctx, (const uint8_t *)(identity->path),
|
|
strlen(identity->path));
|
|
}
|
|
sha256_Final(&ctx, hash);
|
|
return 1;
|
|
}
|
|
|
|
static bool check_cointype(const CoinInfo *coin, uint32_t slip44, bool full) {
|
|
#if BITCOIN_ONLY
|
|
(void)full;
|
|
#else
|
|
if (!full) {
|
|
// Some wallets such as Electron-Cash (BCH) store coins on Bitcoin paths.
|
|
// We can allow spending these coins from Bitcoin paths if the coin has
|
|
// implemented strong replay protection via SIGHASH_FORKID. However, we
|
|
// cannot allow spending any testnet coins from Bitcoin paths, because
|
|
// otherwise an attacker could trick the user into spending BCH on a Bitcoin
|
|
// path by signing a seemingly harmless BCH Testnet transaction.
|
|
if (slip44 == SLIP44_BITCOIN && coin->has_fork_id &&
|
|
coin->coin_type != SLIP44_TESTNET) {
|
|
return true;
|
|
}
|
|
}
|
|
#endif
|
|
return coin->coin_type == slip44;
|
|
}
|
|
|
|
bool coin_path_check(const CoinInfo *coin, InputScriptType script_type,
|
|
uint32_t address_n_count, const uint32_t *address_n,
|
|
bool has_multisig, CoinPathCheckLevel level) {
|
|
// For level BASIC this function checks that a coin without strong replay
|
|
// protection doesn't access paths that are known to be used by another coin.
|
|
// Used by SignTx to ensure that a user cannot be coerced into signing a
|
|
// testnet transaction or a Litecoin transaction which in fact spends Bitcoin.
|
|
// For level KNOWN this function checks that the path is a recognized path for
|
|
// the given coin. Used by GetAddress to prevent ransom attacks where a user
|
|
// could be coerced to use an address with an unenumerable path.
|
|
// For level SCRIPT_TYPE this function makes the same checks as in level
|
|
// KNOWN, but includes script type checks.
|
|
|
|
const bool check_known = (level >= CoinPathCheckLevel_KNOWN);
|
|
const bool check_script_type = (level >= CoinPathCheckLevel_SCRIPT_TYPE);
|
|
|
|
bool valid = true;
|
|
// m/44' : BIP44 Legacy
|
|
// m / purpose' / coin_type' / account' / change / address_index
|
|
if (address_n_count > 0 && address_n[0] == (0x80000000 + 44)) {
|
|
if (check_known) {
|
|
valid = valid && (address_n_count == 5);
|
|
} else {
|
|
valid = valid && (address_n_count >= 2);
|
|
}
|
|
valid = valid && check_cointype(coin, address_n[1], check_known);
|
|
if (check_script_type) {
|
|
valid = valid && (script_type == InputScriptType_SPENDADDRESS);
|
|
valid = valid && (!has_multisig);
|
|
}
|
|
if (check_known) {
|
|
valid = valid && ((address_n[2] & 0x80000000) == 0x80000000);
|
|
valid = valid && ((address_n[2] & 0x7fffffff) <= PATH_MAX_ACCOUNT);
|
|
valid = valid && (address_n[3] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[4] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
if (address_n_count > 0 && address_n[0] == (0x80000000 + 45)) {
|
|
if (check_script_type) {
|
|
valid = valid && has_multisig;
|
|
}
|
|
|
|
if (address_n_count == 4) {
|
|
// m/45' - BIP45 Copay Abandoned Multisig P2SH
|
|
// m / purpose' / cosigner_index / change / address_index
|
|
// Patterns without a coin_type field must be treated as Bitcoin paths.
|
|
valid = valid && check_cointype(coin, SLIP44_BITCOIN, check_known);
|
|
if (check_script_type) {
|
|
valid = valid && (script_type == InputScriptType_SPENDMULTISIG);
|
|
}
|
|
if (check_known) {
|
|
valid = valid && (address_n[1] <= 100);
|
|
valid = valid && (address_n[2] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[3] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
} else if (address_n_count == 5) {
|
|
// Unchained Capital compatibility pattern. Will be removed in the
|
|
// future.
|
|
// m / 45' / coin_type' / account' / [0-1000000] / address_index
|
|
valid = valid && check_cointype(coin, address_n[1], check_known);
|
|
if (check_script_type) {
|
|
valid = valid && (script_type == InputScriptType_SPENDADDRESS ||
|
|
script_type == InputScriptType_SPENDMULTISIG);
|
|
}
|
|
if (check_known) {
|
|
valid = valid && ((address_n[2] & 0x80000000) == 0x80000000);
|
|
valid = valid && ((address_n[2] & 0x7fffffff) <= PATH_MAX_ACCOUNT);
|
|
valid = valid && (address_n[3] <= 1000000);
|
|
valid = valid && (address_n[4] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
} else if (address_n_count == 6) {
|
|
// Unchained Capital compatibility pattern. Will be removed in the
|
|
// future.
|
|
// m/45'/coin_type'/account'/[0-1000000]/change/address_index
|
|
// m/45'/coin_type/account/[0-1000000]/change/address_index
|
|
valid =
|
|
valid && check_cointype(coin, 0x80000000 | address_n[1], check_known);
|
|
if (check_script_type) {
|
|
valid = valid && (script_type == InputScriptType_SPENDADDRESS ||
|
|
script_type == InputScriptType_SPENDMULTISIG);
|
|
}
|
|
if (check_known) {
|
|
valid = valid &&
|
|
((address_n[1] & 0x80000000) == (address_n[2] & 0x80000000));
|
|
valid = valid && ((address_n[2] & 0x7fffffff) <= PATH_MAX_ACCOUNT);
|
|
valid = valid && (address_n[3] <= 1000000);
|
|
valid = valid && (address_n[4] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[5] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
} else {
|
|
if (check_known) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return valid;
|
|
}
|
|
|
|
// m/48' - BIP48 Copay Multisig P2SH
|
|
// m / purpose' / coin_type' / account' / change / address_index
|
|
// Electrum:
|
|
// m / purpose' / coin_type' / account' / type' / change / address_index
|
|
if (address_n_count > 0 && address_n[0] == (0x80000000 + 48)) {
|
|
if (check_known) {
|
|
valid = valid && (address_n_count == 5 || address_n_count == 6);
|
|
} else {
|
|
valid = valid && (address_n_count >= 2);
|
|
}
|
|
valid = valid && check_cointype(coin, address_n[1], check_known);
|
|
if (check_script_type) {
|
|
valid = valid && has_multisig;
|
|
valid = valid && (script_type == InputScriptType_SPENDMULTISIG ||
|
|
script_type == InputScriptType_SPENDP2SHWITNESS ||
|
|
script_type == InputScriptType_SPENDWITNESS);
|
|
}
|
|
if (check_known) {
|
|
valid = valid && ((address_n[2] & 0x80000000) == 0x80000000);
|
|
valid = valid && ((address_n[2] & 0x7fffffff) <= PATH_MAX_ACCOUNT);
|
|
if (address_n_count == 5) {
|
|
valid = valid && (address_n[3] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[4] <= PATH_MAX_ADDRESS_INDEX);
|
|
} else if (address_n_count == 6) {
|
|
valid = valid && ((address_n[3] & 0x80000000) == 0x80000000);
|
|
valid = valid && ((address_n[3] & 0x7fffffff) <= 3);
|
|
valid = valid && (address_n[4] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[5] <= PATH_MAX_ADDRESS_INDEX);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
// m/49' : BIP49 SegWit
|
|
// m / purpose' / coin_type' / account' / change / address_index
|
|
if (address_n_count > 0 && address_n[0] == (0x80000000 + 49)) {
|
|
valid = valid && coin->has_segwit;
|
|
if (check_known) {
|
|
valid = valid && (address_n_count == 5);
|
|
} else {
|
|
valid = valid && (address_n_count >= 2);
|
|
}
|
|
valid = valid && check_cointype(coin, address_n[1], check_known);
|
|
if (check_script_type) {
|
|
valid = valid && (script_type == InputScriptType_SPENDP2SHWITNESS);
|
|
}
|
|
if (check_known) {
|
|
valid = valid && ((address_n[2] & 0x80000000) == 0x80000000);
|
|
valid = valid && ((address_n[2] & 0x7fffffff) <= PATH_MAX_ACCOUNT);
|
|
valid = valid && (address_n[3] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[4] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
// m/84' : BIP84 Native SegWit
|
|
// m / purpose' / coin_type' / account' / change / address_index
|
|
if (address_n_count > 0 && address_n[0] == (0x80000000 + 84)) {
|
|
valid = valid && coin->has_segwit;
|
|
valid = valid && (coin->bech32_prefix != NULL);
|
|
if (check_known) {
|
|
valid = valid && (address_n_count == 5);
|
|
} else {
|
|
valid = valid && (address_n_count >= 2);
|
|
}
|
|
valid = valid && check_cointype(coin, address_n[1], check_known);
|
|
if (check_script_type) {
|
|
valid = valid && (script_type == InputScriptType_SPENDWITNESS);
|
|
}
|
|
if (check_known) {
|
|
valid = valid && ((address_n[2] & 0x80000000) == 0x80000000);
|
|
valid = valid && ((address_n[2] & 0x7fffffff) <= PATH_MAX_ACCOUNT);
|
|
valid = valid && (address_n[3] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[4] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
// Green Address compatibility pattern. Will be removed in the future.
|
|
// m / [1,4] / address_index
|
|
if (address_n_count > 0 && (address_n[0] == 1 || address_n[0] == 4)) {
|
|
valid = valid && (coin->coin_type == SLIP44_BITCOIN);
|
|
if (check_known) {
|
|
valid = valid && (address_n_count == 2);
|
|
valid = valid && (address_n[1] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
// Green Address compatibility pattern. Will be removed in the future.
|
|
// m / 3' / [1-100]' / [1,4] / address_index
|
|
if (address_n_count > 0 && address_n[0] == (0x80000000 + 3)) {
|
|
valid = valid && (coin->coin_type == SLIP44_BITCOIN);
|
|
if (check_known) {
|
|
valid = valid && (address_n_count == 4);
|
|
valid = valid && ((address_n[1] & 0x80000000) == 0x80000000);
|
|
valid = valid && ((address_n[1] & 0x7fffffff) <= 100);
|
|
valid = valid && (address_n[2] == 1 || address_n[2] == 4);
|
|
valid = valid && (address_n[3] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
// Green Address compatibility patterns. Will be removed in the future.
|
|
// m / 1195487518
|
|
// m / 1195487518 / 6 / address_index
|
|
if (address_n_count > 0 && address_n[0] == 1195487518) {
|
|
valid = valid && (coin->coin_type == SLIP44_BITCOIN);
|
|
if (check_known) {
|
|
if (address_n_count == 3) {
|
|
valid = valid && (address_n[1] == 6);
|
|
valid = valid && (address_n[2] <= PATH_MAX_ADDRESS_INDEX);
|
|
} else if (address_n_count != 1) {
|
|
return false;
|
|
}
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
// Casa compatibility pattern. Will be removed in the future.
|
|
// m / 49 / coin_type / account / change / address_index
|
|
if (address_n_count > 0 && address_n[0] == 49) {
|
|
if (check_known) {
|
|
valid = valid && (address_n_count == 5);
|
|
} else {
|
|
valid = valid && (address_n_count >= 2);
|
|
}
|
|
valid =
|
|
valid && check_cointype(coin, 0x80000000 | address_n[1], check_known);
|
|
if (check_script_type) {
|
|
valid = valid && (script_type == InputScriptType_SPENDP2SHWITNESS);
|
|
}
|
|
if (check_known) {
|
|
valid = valid && ((address_n[1] & 0x80000000) == 0);
|
|
valid = valid && (address_n[2] <= PATH_MAX_ACCOUNT);
|
|
valid = valid && (address_n[3] <= PATH_MAX_CHANGE);
|
|
valid = valid && (address_n[4] <= PATH_MAX_ADDRESS_INDEX);
|
|
}
|
|
return valid;
|
|
}
|
|
|
|
// we allow unknown paths only when a full check is not required
|
|
return level == CoinPathCheckLevel_BASIC;
|
|
}
|