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Code Issues Releases Wiki Activity

feat(legacy): Introduce SIGHASH_ALL_TAPROOT.

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This commit is contained in:
Andrew Kozlik 2021-11-12 11:16:34 +01:00 committed by Andrew Kozlik
parent 6fbbd14f8c
commit 9f65165887
1 changed files with 23 additions and 10 deletions
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33
legacy/firmware/signing.c
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@ -168,7 +168,16 @@ static uint8_t orig_hash[32]; // TXID of the original transaction.
#define MAX_BIP125_RBF_SEQUENCE 0xFFFFFFFD
enum {
// Signature hash type with the same semantics as SIGHASH_ALL, but instead of
// having to include the byte in the signature, it is implied.
SIGHASH_ALL_TAPROOT = 0,
// Default signature hash type in Bitcoin which signs all inputs and all
// outputs of the transaction.
SIGHASH_ALL = 1,
// Signature hash flag used in some Bitcoin-like altcoins for replay
// protection.
SIGHASH_FORKID = 0x40,
};
@ -1755,8 +1764,11 @@ static bool signing_confirm_tx(void) {
return true;
}
static uint32_t signing_hash_type(void) {
static uint32_t signing_hash_type(const TxInputType *txinput) {
uint32_t hash_type = SIGHASH_ALL;
if (txinput->script_type == InputScriptType_SPENDTAPROOT) {
hash_type = SIGHASH_ALL_TAPROOT;
}
if (coin->has_fork_id) {
hash_type |= (coin->fork_id << 8) | SIGHASH_FORKID;
@ -1767,7 +1779,7 @@ static uint32_t signing_hash_type(void) {
static void signing_hash_bip143(const TxInfo *tx_info,
const TxInputType *txinput, uint8_t *hash) {
uint32_t hash_type = signing_hash_type();
uint32_t hash_type = signing_hash_type(txinput);
Hasher hasher_preimage = {0};
hasher_Init(&hasher_preimage, coin->curve->hasher_sign);
@ -1830,7 +1842,7 @@ static void signing_hash_bip341(const TxInfo *tx_info, uint32_t i,
#if !BITCOIN_ONLY
static void signing_hash_zip243(const TxInfo *tx_info,
const TxInputType *txinput, uint8_t *hash) {
uint32_t hash_type = signing_hash_type();
uint32_t hash_type = signing_hash_type(txinput);
uint8_t personal[16] = {0};
memcpy(personal, "ZcashSigHash", 12);
memcpy(personal + 12, &tx_info->branch_id, 4);
@ -1916,7 +1928,7 @@ static bool signing_check_orig_tx(void) {
signing_hash_bip143(&orig_info, &orig_verif_input, hash);
} else {
// Finalize legacy digest computation.
uint32_t hash_type = signing_hash_type();
uint32_t hash_type = signing_hash_type(&orig_verif_input);
hasher_Update(&ti.hasher, (const uint8_t *)&hash_type, 4);
tx_hash_final(&ti, hash, false);
}
@ -2014,8 +2026,9 @@ static void phase1_request_orig_output(void) {
}
#if !BITCOIN_ONLY
static void signing_hash_decred(const uint8_t *hash_witness, uint8_t *hash) {
uint32_t hash_type = signing_hash_type();
static void signing_hash_decred(const TxInputType *txinput,
const uint8_t *hash_witness, uint8_t *hash) {
uint32_t hash_type = signing_hash_type(txinput);
Hasher hasher_preimage = {0};
hasher_Init(&hasher_preimage, coin->curve->hasher_sign);
hasher_Update(&hasher_preimage, (const uint8_t *)&hash_type, 4);
@ -2052,7 +2065,7 @@ static bool signing_sign_hash(TxInputType *txinput, const uint8_t *private_key,
resp.serialized.signature.size =
ecdsa_sig_to_der(sig, resp.serialized.signature.bytes);
uint8_t sighash = signing_hash_type() & 0xff;
uint8_t sighash = signing_hash_type(txinput) & 0xff;
if (txinput->has_multisig) {
// fill in the signature
int pubkey_idx =
@ -2093,7 +2106,7 @@ static bool signing_sign_input(void) {
return false;
}
uint32_t hash_type = signing_hash_type();
uint32_t hash_type = signing_hash_type(&input);
hasher_Update(&ti.hasher, (const uint8_t *)&hash_type, 4);
tx_hash_final(&ti, hash, false);
resp.has_serialized = true;
@ -2126,7 +2139,7 @@ static bool signing_sign_segwit_input(TxInputType *txinput) {
if (!signing_sign_hash(txinput, node.private_key, node.public_key, hash))
return false;
uint8_t sighash = signing_hash_type() & 0xff;
uint8_t sighash = signing_hash_type(txinput) & 0xff;
if (txinput->has_multisig) {
uint32_t r = 1; // skip number of items (filled in later)
resp.serialized.serialized_tx.bytes[r] = 0;
@ -2184,7 +2197,7 @@ static bool signing_sign_segwit_input(TxInputType *txinput) {
static bool signing_sign_decred_input(TxInputType *txinput) {
uint8_t hash[32] = {}, hash_witness[32] = {};
tx_hash_final(&ti, hash_witness, false);
signing_hash_decred(hash_witness, hash);
signing_hash_decred(txinput, hash_witness, hash);
resp.has_serialized = true;
if (!signing_sign_hash(txinput, node.private_key, node.public_key, hash))
return false;