const HDNode *fsm_getDerivedNode(uint32_t *address_n, size_t address_n_count) { static HDNode node; if(!storage_get_root_node(&node)) { fsm_sendFailure(FailureType_Failure_NotInitialized, "Device not initialized or passphrase request cancelled"); go_home(); return 0; } if(!address_n || address_n_count == 0) { return &node; } if(hdnode_private_ckd_cached(&node, address_n, address_n_count) == 0) { fsm_sendFailure(FailureType_Failure_Other, "Failed to derive private key"); go_home(); return 0; } return &node; }
/* * verify_exchange_address - verify address specified in exchange contract belongs to device. * * INPUT * coin - the CoinType * address_n_count - depth of node * address_n - pointer to node path * address_str - string representation of address * address_str_len - address length * root - root hd node * * OUTPUT * true/false - success/failure */ static bool verify_exchange_address(const CoinType *coin, size_t address_n_count, uint32_t *address_n, char *address_str, size_t address_str_len, const HDNode *root, bool is_token) { static CONFIDENTIAL HDNode node; memcpy(&node, root, sizeof(HDNode)); if (hdnode_private_ckd_cached(&node, address_n, address_n_count, NULL) == 0) { memzero(&node, sizeof(node)); return false; } if (isEthereumLike(coin->coin_name) || is_token) { char tx_out_address[sizeof(((ExchangeAddress *)NULL)->address)]; EthereumAddress_address_t ethereum_addr; ethereum_addr.size = 20; if (hdnode_get_ethereum_pubkeyhash(&node, ethereum_addr.bytes) == 0) { memzero(&node, sizeof(node)); return false; } data2hex((char *)ethereum_addr.bytes, 20, tx_out_address); return addresses_same(tx_out_address, sizeof(tx_out_address), address_str, address_str_len, true); } const curve_info *curve = get_curve_by_name(coin->curve_name); if (!curve) { memzero(&node, sizeof(node)); return false; } char tx_out_address[36]; hdnode_fill_public_key(&node); ecdsa_get_address(node.public_key, coin->address_type, curve->hasher_pubkey, curve->hasher_base58, tx_out_address, sizeof(tx_out_address)); memzero(&node, sizeof(node)); return strncmp(tx_out_address, address_str, sizeof(tx_out_address)) == 0; }
static HDNode *fsm_getDerivedNode(const char *curve, const uint32_t *address_n, size_t address_n_count, uint32_t *fingerprint) { static CONFIDENTIAL HDNode node; if (fingerprint) { *fingerprint = 0; } if (!storage_getRootNode(&node, curve, true)) { fsm_sendFailure(Failure_FailureType_Failure_NotInitialized, _("Device not initialized or passphrase request cancelled or unsupported curve")); layoutHome(); return 0; } if (!address_n || address_n_count == 0) { return &node; } if (hdnode_private_ckd_cached(&node, address_n, address_n_count, fingerprint) == 0) { fsm_sendFailure(Failure_FailureType_Failure_ProcessError, _("Failed to derive private key")); layoutHome(); return 0; } return &node; }
void signing_txack(TransactionType *tx) { if (!signing) { fsm_sendFailure(FailureType_Failure_UnexpectedMessage, "Not in Signing mode"); go_home(); return; } int co; memset(&resp, 0, sizeof(TxRequest)); switch (signing_stage) { case STAGE_REQUEST_1_INPUT: /* compute multisig fingerprint */ /* (if all input share the same fingerprint, outputs having the same fingerprint will be considered as change outputs) */ if (tx->inputs[0].script_type == InputScriptType_SPENDMULTISIG) { if (tx->inputs[0].has_multisig && !multisig_fp_mismatch) { if (multisig_fp_set) { uint8_t h[32]; if (cryptoMultisigFingerprint(&(tx->inputs[0].multisig), h) == 0) { fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint"); signing_abort(); return; } if (memcmp(multisig_fp, h, 32) != 0) { multisig_fp_mismatch = true; } } else { if (cryptoMultisigFingerprint(&(tx->inputs[0].multisig), multisig_fp) == 0) { fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint"); signing_abort(); return; } multisig_fp_set = true; } } } else { // InputScriptType_SPENDADDRESS multisig_fp_mismatch = true; } sha256_Update(&tc, (const uint8_t *)tx->inputs, sizeof(TxInputType)); memcpy(&input, tx->inputs, sizeof(TxInputType)); send_req_2_prev_meta(); return; case STAGE_REQUEST_2_PREV_META: tx_init(&tp, tx->inputs_cnt, tx->outputs_cnt, tx->version, tx->lock_time, false); idx2 = 0; send_req_2_prev_input(); return; case STAGE_REQUEST_2_PREV_INPUT: if (!tx_serialize_input_hash(&tp, tx->inputs)) { fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize input"); signing_abort(); return; } if (idx2 < tp.inputs_len - 1) { idx2++; send_req_2_prev_input(); } else { idx2 = 0; send_req_2_prev_output(); } return; case STAGE_REQUEST_2_PREV_OUTPUT: if (!tx_serialize_output_hash(&tp, tx->bin_outputs)) { fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize output"); signing_abort(); return; } if (idx2 == input.prev_index) { to_spend += tx->bin_outputs[0].amount; } if (idx2 < tp.outputs_len - 1) { /* Check prevtx of next input */ idx2++; send_req_2_prev_output(); } else { /* Check next output */ tx_hash_final(&tp, hash, true); if (memcmp(hash, input.prev_hash.bytes, 32) != 0) { fsm_sendFailure(FailureType_Failure_Other, "Encountered invalid prevhash"); signing_abort(); return; } if (idx1 < inputs_count - 1) { idx1++; send_req_1_input(); } else { idx1 = 0; send_req_3_output(); } } return; case STAGE_REQUEST_3_OUTPUT: { /* Downloaded output idx1 the first time. * Add it to transaction check * Ask for permission. */ bool is_change = false; if (tx->outputs[0].script_type == OutputScriptType_PAYTOMULTISIG && tx->outputs[0].has_multisig && multisig_fp_set && !multisig_fp_mismatch) { uint8_t h[32]; if (cryptoMultisigFingerprint(&(tx->outputs[0].multisig), h) == 0) { fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint"); signing_abort(); return; } if (memcmp(multisig_fp, h, 32) == 0) { is_change = true; } } else { if(tx->outputs[0].has_address_type) { if(check_valid_output_address(tx->outputs) == false) { fsm_sendFailure(FailureType_Failure_Other, "Invalid output address type"); signing_abort(); return; } if(tx->outputs[0].script_type == OutputScriptType_PAYTOADDRESS && tx->outputs[0].address_n_count > 0 && tx->outputs[0].address_type == OutputAddressType_CHANGE) { is_change = true; } } else if(tx->outputs[0].script_type == OutputScriptType_PAYTOADDRESS && tx->outputs[0].address_n_count > 0) { is_change = true; } } if (is_change) { if (change_spend == 0) { // not set change_spend = tx->outputs[0].amount; } else { fsm_sendFailure(FailureType_Failure_Other, "Only one change output allowed"); signing_abort(); return; } } spending += tx->outputs[0].amount; co = compile_output(coin, root, tx->outputs, &bin_output, !is_change); if (co < 0) { fsm_sendFailure(FailureType_Failure_Other, "Signing cancelled by user"); signing_abort(); return; } else if (co == 0) { fsm_sendFailure(FailureType_Failure_Other, "Failed to compile output"); signing_abort(); return; } sha256_Update(&tc, (const uint8_t *)&bin_output, sizeof(TxOutputBinType)); if (idx1 < outputs_count - 1) { idx1++; send_req_3_output(); } else { sha256_Final(hash_check, &tc); // check fees if (spending > to_spend) { fsm_sendFailure(FailureType_Failure_NotEnoughFunds, "Not enough funds"); signing_abort(); return; } uint64_t fee = to_spend - spending; uint32_t tx_est_size = transactionEstimateSizeKb(inputs_count, outputs_count); char total_amount_str[32]; char fee_str[32]; coin_amnt_to_str(coin, fee, fee_str, sizeof(fee_str)); if(fee > (uint64_t)tx_est_size * coin->maxfee_kb) { if (!confirm(ButtonRequestType_ButtonRequest_FeeOverThreshold, "Confirm Fee", "%s", fee_str)) { fsm_sendFailure(FailureType_Failure_ActionCancelled, "Fee over threshold. Signing cancelled."); signing_abort(); return; } } // last confirmation coin_amnt_to_str(coin, to_spend - change_spend, total_amount_str, sizeof(total_amount_str)); if(!confirm_transaction(total_amount_str, fee_str)) { fsm_sendFailure(FailureType_Failure_ActionCancelled, "Signing cancelled by user"); signing_abort(); return; } // Everything was checked, now phase 2 begins and the transaction is signed. layout_simple_message("Signing Transaction..."); idx1 = 0; idx2 = 0; send_req_4_input(); } return; } case STAGE_REQUEST_4_INPUT: if (idx2 == 0) { tx_init(&ti, inputs_count, outputs_count, version, lock_time, true); sha256_Init(&tc); sha256_Update(&tc, (const uint8_t *)&inputs_count, sizeof(inputs_count)); sha256_Update(&tc, (const uint8_t *)&outputs_count, sizeof(outputs_count)); sha256_Update(&tc, (const uint8_t *)&version, sizeof(version)); sha256_Update(&tc, (const uint8_t *)&lock_time, sizeof(lock_time)); memset(privkey, 0, 32); memset(pubkey, 0, 33); } sha256_Update(&tc, (const uint8_t *)tx->inputs, sizeof(TxInputType)); if (idx2 == idx1) { memcpy(&input, tx->inputs, sizeof(TxInputType)); memcpy(&node, root, sizeof(HDNode)); if (hdnode_private_ckd_cached(&node, tx->inputs[0].address_n, tx->inputs[0].address_n_count) == 0) { fsm_sendFailure(FailureType_Failure_Other, "Failed to derive private key"); signing_abort(); return; } if (tx->inputs[0].script_type == InputScriptType_SPENDMULTISIG) { if (!tx->inputs[0].has_multisig) { fsm_sendFailure(FailureType_Failure_Other, "Multisig info not provided"); signing_abort(); return; } tx->inputs[0].script_sig.size = compile_script_multisig(&(tx->inputs[0].multisig), tx->inputs[0].script_sig.bytes); } else { // SPENDADDRESS ecdsa_get_pubkeyhash(node.public_key, hash); tx->inputs[0].script_sig.size = compile_script_sig(coin->address_type, hash, tx->inputs[0].script_sig.bytes); } if (tx->inputs[0].script_sig.size == 0) { fsm_sendFailure(FailureType_Failure_Other, "Failed to compile input"); signing_abort(); return; } memcpy(privkey, node.private_key, 32); memcpy(pubkey, node.public_key, 33); } else { tx->inputs[0].script_sig.size = 0; } if (!tx_serialize_input_hash(&ti, tx->inputs)) { fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize input"); signing_abort(); return; } if (idx2 < inputs_count - 1) { idx2++; send_req_4_input(); } else { idx2 = 0; send_req_4_output(); } return; case STAGE_REQUEST_4_OUTPUT: co = compile_output(coin, root, tx->outputs, &bin_output, false); if (co < 0) { fsm_sendFailure(FailureType_Failure_Other, "Signing cancelled by user"); signing_abort(); return; } else if (co == 0) { fsm_sendFailure(FailureType_Failure_Other, "Failed to compile output"); signing_abort(); return; } sha256_Update(&tc, (const uint8_t *)&bin_output, sizeof(TxOutputBinType)); if (!tx_serialize_output_hash(&ti, &bin_output)) { fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize output"); signing_abort(); return; } if (idx2 < outputs_count - 1) { idx2++; send_req_4_output(); } else { sha256_Final(hash, &tc); if (memcmp(hash, hash_check, 32) != 0) { fsm_sendFailure(FailureType_Failure_Other, "Transaction has changed during signing"); signing_abort(); return; } tx_hash_final(&ti, hash, false); resp.has_serialized = true; resp.serialized.has_signature_index = true; resp.serialized.signature_index = idx1; resp.serialized.has_signature = true; resp.serialized.has_serialized_tx = true; ecdsa_sign_digest(&secp256k1, privkey, hash, sig, 0); resp.serialized.signature.size = ecdsa_sig_to_der(sig, resp.serialized.signature.bytes); if (input.script_type == InputScriptType_SPENDMULTISIG) { if (!input.has_multisig) { fsm_sendFailure(FailureType_Failure_Other, "Multisig info not provided"); signing_abort(); return; } // fill in the signature int pubkey_idx = cryptoMultisigPubkeyIndex(&(input.multisig), pubkey); if (pubkey_idx < 0) { fsm_sendFailure(FailureType_Failure_Other, "Pubkey not found in multisig script"); signing_abort(); return; } memcpy(input.multisig.signatures[pubkey_idx].bytes, resp.serialized.signature.bytes, resp.serialized.signature.size); input.multisig.signatures[pubkey_idx].size = resp.serialized.signature.size; input.script_sig.size = serialize_script_multisig(&(input.multisig), input.script_sig.bytes); if (input.script_sig.size == 0) { fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize multisig script"); signing_abort(); return; } } else { // SPENDADDRESS input.script_sig.size = serialize_script_sig(resp.serialized.signature.bytes, resp.serialized.signature.size, pubkey, 33, input.script_sig.bytes); } resp.serialized.serialized_tx.size = tx_serialize_input(&to, &input, resp.serialized.serialized_tx.bytes); if (idx1 < inputs_count - 1) { idx1++; idx2 = 0; send_req_4_input(); } else { idx1 = 0; send_req_5_output(); } } return; case STAGE_REQUEST_5_OUTPUT: if (compile_output(coin, root, tx->outputs, &bin_output,false) <= 0) { fsm_sendFailure(FailureType_Failure_Other, "Failed to compile output"); signing_abort(); return; } resp.has_serialized = true; resp.serialized.has_serialized_tx = true; resp.serialized.serialized_tx.size = tx_serialize_output(&to, &bin_output, resp.serialized.serialized_tx.bytes); if (idx1 < outputs_count - 1) { idx1++; send_req_5_output(); } else { send_req_finished(); signing_abort(); } return; } fsm_sendFailure(FailureType_Failure_Other, "Signing error"); signing_abort(); }