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legacy(feature): disable bitcoin-like transaction signing anti-exfil

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protocol

[no changelog]
This commit is contained in:
Ondřej Vejpustek 2025-03-25 16:33:45 +01:00
parent 98c317c34d
commit c58f1e6ec1
1 changed files with 17 additions and 2 deletions
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19
legacy/firmware/signing.c
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@ -3144,6 +3144,13 @@ static void signing_hash_decred(const TxInputType *txinput,
static bool signing_sign_ecdsa(TxInputType *txinput, const uint8_t *private_key,
const uint8_t *public_key, const uint8_t *hash) {
if (txinput->has_entropy_commitment) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Anti-exfil not supported"));
signing_abort();
return false;
}
resp.has_serialized = true;
resp.serialized.has_signature_index = true;
resp.serialized.signature_index = idx1;
@ -3188,8 +3195,16 @@ static bool signing_sign_ecdsa(TxInputType *txinput, const uint8_t *private_key,
return true;
}
static bool signing_sign_bip340(const uint8_t *private_key,
static bool signing_sign_bip340(TxInputType *txinput,
const uint8_t *private_key,
const uint8_t *hash) {
if (txinput->has_entropy_commitment) {
fsm_sendFailure(FailureType_Failure_ProcessError,
_("Anti-exfil not supported"));
signing_abort();
return false;
}
resp.has_serialized = true;
resp.serialized.has_signature_index = true;
resp.serialized.signature_index = idx1;
@ -3240,7 +3255,7 @@ static bool signing_sign_segwit_input(TxInputType *txinput) {
if (!input_validate_path(txinput) || !tx_info_check_input(&info, txinput) ||
!input_derive_node(txinput) ||
!signing_sign_bip340(node.private_key, hash)) {
!signing_sign_bip340(txinput, node.private_key, hash)) {
return false;
}