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Fix multisig for BCC

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This commit is contained in:
Jochen Hoenicke 2017-07-29 21:58:49 +02:00 committed by Pavol Rusnak
parent 5f6948e66b
commit 3440ead4c9
No known key found for this signature in database
GPG Key ID: 91F3B339B9A02A3D
2 changed files with 18 additions and 10 deletions
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2
firmware/crypto.c
View File

@ -352,7 +352,7 @@ int cryptoMultisigFingerprint(const MultisigRedeemScriptType *multisig, uint8_t
{
static const HDNodePathType *ptr[15], *swap;
const uint32_t n = multisig->pubkeys_count;
if (n > 15) {
if (n < 1 || n > 15) {
return 0;
}
// check sanity

22
firmware/signing.c
View File

@ -525,20 +525,27 @@ static bool signing_check_output(TxOutputType *txoutput) {
signing_abort();
return false;
}
if (txoutput->script_type == OutputScriptType_PAYTOMULTISIG) {
/*
* For multisig check that all inputs are multisig
*/
if (txoutput->has_multisig) {
uint8_t h[32];
if (multisig_fp_set && !multisig_fp_mismatch
&& cryptoMultisigFingerprint(&(txoutput->multisig), h)
&& memcmp(multisig_fp, h, 32) == 0) {
is_change = check_change_bip32_path(txoutput);
}
} else if (txoutput->script_type == OutputScriptType_PAYTOADDRESS) {
is_change = check_change_bip32_path(txoutput);
} else if (txoutput->script_type == OutputScriptType_PAYTOWITNESS && txoutput->amount < authorized_amount) {
is_change = check_change_bip32_path(txoutput);
} else if (txoutput->script_type == OutputScriptType_PAYTOP2SHWITNESS && txoutput->amount < authorized_amount) {
} else {
is_change = check_change_bip32_path(txoutput);
}
/*
* only allow segwit change if amount is smaller than what segwit inputs paid.
*/
if ((txoutput->script_type == OutputScriptType_PAYTOWITNESS
|| txoutput->script_type == OutputScriptType_PAYTOP2SHWITNESS)
&& txoutput->amount > authorized_amount) {
is_change = false;
}
}
if (is_change) {
@ -1020,7 +1027,8 @@ void signing_txack(TransactionType *tx)
resp.serialized.has_signature_index = false;
resp.serialized.has_signature = false;
resp.serialized.has_serialized_tx = true;
if (tx->inputs[0].script_type == InputScriptType_SPENDADDRESS) {
if (tx->inputs[0].script_type == InputScriptType_SPENDMULTISIG
|| tx->inputs[0].script_type == InputScriptType_SPENDADDRESS) {
if (!coin->has_forkid) {
fsm_sendFailure(FailureType_Failure_DataError, _("Transaction has changed during signing"));
signing_abort();