mirror of
https://github.com/trezor/trezor-firmware.git
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integrate signing reorder patch by Jochen
This commit is contained in:
Pavol Rusnak
parent
ed3fbf901c
commit
03faa85cc4
@ -37,11 +37,12 @@ enum {
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STAGE_REQUEST_2_PREV_META,
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STAGE_REQUEST_2_PREV_INPUT,
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STAGE_REQUEST_2_PREV_OUTPUT,
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STAGE_REQUEST_3_INPUT,
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STAGE_REQUEST_3_OUTPUT,
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STAGE_REQUEST_4_OUTPUT
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STAGE_REQUEST_4_INPUT,
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STAGE_REQUEST_4_OUTPUT,
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STAGE_REQUEST_5_OUTPUT
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} signing_stage;
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static uint32_t idx1i, idx2i, idx2o, idx3i, idx3o, idx4o;
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static uint32_t idx1, idx2;
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static TxRequest resp;
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static TxInputType input;
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static TxOutputBinType bin_output;
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@ -55,57 +56,74 @@ static bool multisig_fp_set, multisig_fp_mismatch;
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static uint8_t multisig_fp[32];
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/*
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Workflow of streamed signing
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The STAGE_ constants describe the signing_stage when request is sent.
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I - input
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O - output
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foreach I:
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Request I STAGE_REQUEST_1_INPUT
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Phase1 - check inputs, previous transactions, and outputs
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- ask for confirmations
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- check fee
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=========================================================
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foreach I (idx1):
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Request I STAGE_REQUEST_1_INPUT
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Add I to TransactionChecksum
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Calculate amount of I:
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Request prevhash I, META STAGE_REQUEST_2_PREV_META
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foreach prevhash I: STAGE_REQUEST_2_PREV_INPUT
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Request prevhash I
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foreach prevhash O: STAGE_REQUEST_2_PREV_OUTPUT
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Request prevhash O
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Store amount of I
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foreach prevhash I (idx2):
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Request prevhash I STAGE_REQUEST_2_PREV_INPUT
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foreach prevhash O (idx2):
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Request prevhash O STAGE_REQUEST_2_PREV_OUTPUT
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Add amount of prevhash O (which is amount of I)
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Calculate hash of streamed tx, compare to prevhash I
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foreach O (idx1):
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Request O STAGE_REQUEST_3_OUTPUT
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Add O to TransactionChecksum
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Display output
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Ask for confirmation
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foreach I: STAGE_REQUEST_3_INPUT
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Request I
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If I == I-to-be-signed:
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Check tx fee
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Ask for confirmation
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Phase2: sign inputs, check that nothing changed
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===============================================
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foreach I (idx1): // input to sign
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foreach I (idx2):
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Request I STAGE_REQUEST_4_INPUT
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If idx1 == idx2
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Remember key for signing
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Fill scriptsig
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Add I to StreamTransactionSign
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foreach O:
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Request O STAGE_REQUEST_3_OUTPUT
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If I=0:
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Display output
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Ask for confirmation
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Add I to TransactionChecksum
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foreach O (idx2):
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Request O STAGE_REQUEST_4_OUTPUT
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Add O to StreamTransactionSign
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Add O to TransactionChecksum
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If I=0:
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Check tx fee
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Calculate txhash
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else:
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Compare current hash with txhash
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If different:
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Failure
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Compare TransactionChecksum with checksum computed in Phase 1
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If different:
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Failure
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Sign StreamTransactionSign
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Return signed chunk
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*/
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foreach O (idx1):
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Request O STAGE_REQUEST_5_OUTPUT
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Rewrite change address
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Return O
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*/
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void send_req_1_input(void)
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{
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layoutProgress("Signing transaction", 1000 * progress / progress_total);
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idx2i = idx2o = idx3i = idx3o = 0;
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signing_stage = STAGE_REQUEST_1_INPUT;
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resp.has_request_type = true;
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resp.request_type = RequestType_TXINPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx1i;
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resp.details.request_index = idx1;
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msg_write(MessageType_MessageType_TxRequest, &resp);
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}
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@ -130,7 +148,7 @@ void send_req_2_prev_input(void)
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resp.request_type = RequestType_TXINPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx2i;
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resp.details.request_index = idx2;
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resp.details.has_tx_hash = true;
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resp.details.tx_hash.size = input.prev_hash.size;
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memcpy(resp.details.tx_hash.bytes, input.prev_hash.bytes, resp.details.tx_hash.size);
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@ -145,25 +163,13 @@ void send_req_2_prev_output(void)
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resp.request_type = RequestType_TXOUTPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx2o;
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resp.details.request_index = idx2;
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resp.details.has_tx_hash = true;
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resp.details.tx_hash.size = input.prev_hash.size;
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memcpy(resp.details.tx_hash.bytes, input.prev_hash.bytes, resp.details.tx_hash.size);
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msg_write(MessageType_MessageType_TxRequest, &resp);
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}
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void send_req_3_input(void)
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{
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layoutProgress("Signing transaction", 1000 * progress / progress_total);
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signing_stage = STAGE_REQUEST_3_INPUT;
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resp.has_request_type = true;
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resp.request_type = RequestType_TXINPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx3i;
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msg_write(MessageType_MessageType_TxRequest, &resp);
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}
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void send_req_3_output(void)
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{
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layoutProgress("Signing transaction", 1000 * progress / progress_total);
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@ -172,7 +178,19 @@ void send_req_3_output(void)
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resp.request_type = RequestType_TXOUTPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx3o;
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resp.details.request_index = idx1;
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msg_write(MessageType_MessageType_TxRequest, &resp);
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}
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void send_req_4_input(void)
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{
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layoutProgress("Signing transaction", 1000 * progress / progress_total);
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signing_stage = STAGE_REQUEST_4_INPUT;
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resp.has_request_type = true;
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resp.request_type = RequestType_TXINPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx2;
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msg_write(MessageType_MessageType_TxRequest, &resp);
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}
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@ -184,7 +202,19 @@ void send_req_4_output(void)
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resp.request_type = RequestType_TXOUTPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx4o;
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resp.details.request_index = idx2;
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msg_write(MessageType_MessageType_TxRequest, &resp);
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}
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void send_req_5_output(void)
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{
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layoutProgress("Signing transaction", 1000 * progress / progress_total);
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signing_stage = STAGE_REQUEST_5_OUTPUT;
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resp.has_request_type = true;
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resp.request_type = RequestType_TXOUTPUT;
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resp.has_details = true;
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resp.details.has_request_index = true;
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resp.details.request_index = idx1;
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msg_write(MessageType_MessageType_TxRequest, &resp);
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}
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@ -203,7 +233,7 @@ void signing_init(uint32_t _inputs_count, uint32_t _outputs_count, const CoinTyp
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coin = _coin;
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root = _root;
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idx1i = idx2i = idx2o = idx3i = idx3o = idx4o = 0;
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idx1 = 0;
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to_spend = 0;
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spending = 0;
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change_spend = 0;
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@ -218,6 +248,7 @@ void signing_init(uint32_t _inputs_count, uint32_t _outputs_count, const CoinTyp
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multisig_fp_mismatch = false;
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tx_init(&to, inputs_count, outputs_count, version, lock_time, false);
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tx_init(&tc, inputs_count, outputs_count, version, lock_time, false);
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layoutProgressSwipe("Signing transaction", 0);
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@ -240,11 +271,40 @@ void signing_txack(TransactionType *tx)
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switch (signing_stage) {
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case STAGE_REQUEST_1_INPUT:
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progress++;
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/* compute multisig fingerprint */
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/* (if all input share the same fingerprint, outputs having the same fingerprint will be considered as change outputs) */
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if (tx->inputs[0].script_type == InputScriptType_SPENDMULTISIG &&
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tx->inputs[0].has_multisig && !multisig_fp_mismatch) {
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if (multisig_fp_set) {
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uint8_t h[32];
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if (cryptoMultisigFingerprint(&(tx->inputs[0].multisig), h) == 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint");
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signing_abort();
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return;
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}
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if (memcmp(multisig_fp, h, 32) != 0) {
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multisig_fp_mismatch = true;
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}
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} else {
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if (cryptoMultisigFingerprint(&(tx->inputs[0].multisig), multisig_fp) == 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint");
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signing_abort();
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return;
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}
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multisig_fp_set = true;
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}
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}
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if (!tx_serialize_input_hash(&tc, tx->inputs)) {
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fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize input");
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signing_abort();
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return;
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}
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memcpy(&input, tx->inputs, sizeof(TxInputType));
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send_req_2_prev_meta();
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return;
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case STAGE_REQUEST_2_PREV_META:
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tx_init(&tp, tx->inputs_cnt, tx->outputs_cnt, tx->version, tx->lock_time, false);
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idx2 = 0;
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send_req_2_prev_input();
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return;
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case STAGE_REQUEST_2_PREV_INPUT:
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@ -253,10 +313,11 @@ void signing_txack(TransactionType *tx)
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signing_abort();
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return;
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}
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if (idx2i < tp.inputs_len - 1) {
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idx2i++;
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if (idx2 < tp.inputs_len - 1) {
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idx2++;
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send_req_2_prev_input();
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} else {
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idx2 = 0;
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send_req_2_prev_output();
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}
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return;
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@ -266,57 +327,136 @@ void signing_txack(TransactionType *tx)
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signing_abort();
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return;
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}
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if (idx2o == input.prev_index) {
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if (idx2 == input.prev_index) {
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to_spend += tx->bin_outputs[0].amount;
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}
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if (idx2o < tp.outputs_len - 1) {
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idx2o++;
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if (idx2 < tp.outputs_len - 1) {
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/* Check prevtx of next input */
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idx2++;
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send_req_2_prev_output();
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} else {
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/* Check next output */
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tx_hash_final(&tp, hash, true);
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if (memcmp(hash, input.prev_hash.bytes, 32) != 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Encountered invalid prevhash");
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signing_abort();
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return;
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}
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tx_init(&ti, inputs_count, outputs_count, version, lock_time, true);
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tx_init(&tc, inputs_count, outputs_count, version, lock_time, true);
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memset(privkey, 0, 32);
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memset(pubkey, 0, 33);
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send_req_3_input();
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if (idx1 < inputs_count - 1) {
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idx1++;
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send_req_1_input();
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} else {
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idx1 = 0;
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send_req_3_output();
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}
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}
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return;
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case STAGE_REQUEST_3_INPUT:
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case STAGE_REQUEST_3_OUTPUT:
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{
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/* Downloaded output idx1 the first time.
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* Add it to transaction check
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* Ask for permission.
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*/
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bool is_change = false;
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if (tx->outputs[0].script_type == OutputScriptType_PAYTOMULTISIG &&
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tx->outputs[0].has_multisig &&
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multisig_fp_set && !multisig_fp_mismatch) {
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uint8_t h[32];
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if (cryptoMultisigFingerprint(&(tx->outputs[0].multisig), h) == 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint");
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signing_abort();
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return;
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}
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if (memcmp(multisig_fp, h, 32) == 0) {
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is_change = true;
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}
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} else
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if (tx->outputs[0].script_type == OutputScriptType_PAYTOADDRESS &&
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tx->outputs[0].address_n_count > 0) {
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is_change = true;
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}
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if (is_change) {
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if (change_spend == 0) { // not set
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change_spend = tx->outputs[0].amount;
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} else {
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fsm_sendFailure(FailureType_Failure_Other, "Only one change output allowed");
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signing_abort();
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return;
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}
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}
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spending += tx->outputs[0].amount;
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co = compile_output(coin, root, tx->outputs, &bin_output, !is_change);
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if (!is_change) {
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layoutProgress("Signing transaction", 1000 * progress / progress_total);
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}
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if (co < 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Signing cancelled by user");
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signing_abort();
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return;
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} else if (co == 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Failed to compile output");
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signing_abort();
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return;
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}
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if (!tx_serialize_output_hash(&tc, &bin_output)) {
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fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize output");
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signing_abort();
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return;
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}
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if (idx1 < outputs_count - 1) {
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idx1++;
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send_req_3_output();
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} else {
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tx_hash_final(&tc, hash_check, false);
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// check fees
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if (spending > to_spend) {
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fsm_sendFailure(FailureType_Failure_NotEnoughFunds, "Not enough funds");
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layoutHome();
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return;
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}
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uint64_t fee = to_spend - spending;
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uint32_t tx_est_size = transactionEstimateSizeKb(inputs_count, outputs_count);
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if (fee > (uint64_t)tx_est_size * coin->maxfee_kb) {
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layoutFeeOverThreshold(coin, fee, tx_est_size);
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if (!protectButton(ButtonRequestType_ButtonRequest_FeeOverThreshold, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Fee over threshold. Signing cancelled.");
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layoutHome();
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return;
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}
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}
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// last confirmation
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layoutConfirmTx(coin, to_spend - change_spend, fee);
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if (!protectButton(ButtonRequestType_ButtonRequest_SignTx, false)) {
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fsm_sendFailure(FailureType_Failure_ActionCancelled, "Signing cancelled by user");
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signing_abort();
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return;
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}
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// Everything was checked, now phase 2 begins and the transaction is signed.
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idx1 = 0;
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idx2 = 0;
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send_req_4_input();
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}
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return;
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}
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case STAGE_REQUEST_4_INPUT:
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if (idx2 == 0) {
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tx_init(&ti, inputs_count, outputs_count, version, lock_time, true);
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tx_init(&tc, inputs_count, outputs_count, version, lock_time, false);
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memset(privkey, 0, 32);
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memset(pubkey, 0, 33);
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}
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progress++;
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if (!tx_serialize_input_hash(&tc, tx->inputs)) {
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fsm_sendFailure(FailureType_Failure_Other, "Failed to serialize input");
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signing_abort();
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return;
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}
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if (idx1i == 0) {
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if (tx->inputs[0].script_type == InputScriptType_SPENDMULTISIG &&
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tx->inputs[0].has_multisig && !multisig_fp_mismatch) {
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if (multisig_fp_set) {
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uint8_t h[32];
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if (cryptoMultisigFingerprint(&(tx->inputs[0].multisig), h) == 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint");
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signing_abort();
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return;
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}
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if (memcmp(multisig_fp, h, 32) != 0) {
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multisig_fp_mismatch = true;
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}
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} else {
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if (cryptoMultisigFingerprint(&(tx->inputs[0].multisig), multisig_fp) == 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Error computing multisig fingeprint");
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signing_abort();
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return;
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}
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multisig_fp_set = true;
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}
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}
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}
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if (idx3i == idx1i) {
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if (idx2 == idx1) {
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memcpy(&input, tx->inputs, sizeof(TxInputType));
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memcpy(&node, root, sizeof(HDNode));
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if (hdnode_private_ckd_cached(&node, tx->inputs[0].address_n, tx->inputs[0].address_n_count) == 0) {
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fsm_sendFailure(FailureType_Failure_Other, "Failed to derive private key");
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@ -349,51 +489,17 @@ void signing_txack(TransactionType *tx)
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signing_abort();
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return;
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}
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if (idx3i < inputs_count - 1) {
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idx3i++;
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send_req_3_input();
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if (idx2 < inputs_count - 1) {
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idx2++;
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send_req_4_input();
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} else {
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send_req_3_output();
|
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idx2 = 0;
|
||||
send_req_4_output();
|
||||
}
|
||||
return;
|
||||
case STAGE_REQUEST_3_OUTPUT:
|
||||
case STAGE_REQUEST_4_OUTPUT:
|
||||
progress++;
|
||||
if (idx1i == 0) {
|
||||
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].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 (!is_change) {
|
||||
layoutProgress("Signing transaction", 1000 * progress / progress_total);
|
||||
}
|
||||
} else {
|
||||
co = compile_output(coin, root, tx->outputs, &bin_output, false);
|
||||
}
|
||||
co = compile_output(coin, root, tx->outputs, &bin_output, false);
|
||||
if (co < 0) {
|
||||
fsm_sendFailure(FailureType_Failure_Other, "Signing cancelled by user");
|
||||
signing_abort();
|
||||
@ -413,24 +519,20 @@ void signing_txack(TransactionType *tx)
|
||||
signing_abort();
|
||||
return;
|
||||
}
|
||||
if (idx3o < outputs_count - 1) {
|
||||
idx3o++;
|
||||
send_req_3_output();
|
||||
if (idx2 < outputs_count - 1) {
|
||||
idx2++;
|
||||
send_req_4_output();
|
||||
} else {
|
||||
if (idx1i == 0) {
|
||||
tx_hash_final(&tc, hash_check, false);
|
||||
} else {
|
||||
tx_hash_final(&tc, hash, false);
|
||||
if (memcmp(hash, hash_check, 32) != 0) {
|
||||
fsm_sendFailure(FailureType_Failure_Other, "Transaction has changed during signing");
|
||||
signing_abort();
|
||||
return;
|
||||
}
|
||||
tx_hash_final(&tc, hash, false);
|
||||
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 = idx1i;
|
||||
resp.serialized.signature_index = idx1;
|
||||
resp.serialized.has_signature = true;
|
||||
resp.serialized.has_serialized_tx = true;
|
||||
ecdsa_sign_digest(privkey, hash, sig, 0);
|
||||
@ -460,39 +562,19 @@ void signing_txack(TransactionType *tx)
|
||||
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 (idx1i < inputs_count - 1) {
|
||||
idx1i++;
|
||||
send_req_1_input();
|
||||
if (idx1 < inputs_count - 1) {
|
||||
idx1++;
|
||||
idx2 = 0;
|
||||
send_req_4_input();
|
||||
} else {
|
||||
if (spending > to_spend) {
|
||||
fsm_sendFailure(FailureType_Failure_NotEnoughFunds, "Not enough funds");
|
||||
layoutHome();
|
||||
return;
|
||||
}
|
||||
uint64_t fee = to_spend - spending;
|
||||
uint32_t tx_est_size = transactionEstimateSizeKb(inputs_count, outputs_count);
|
||||
if (fee > (uint64_t)tx_est_size * coin->maxfee_kb) {
|
||||
layoutFeeOverThreshold(coin, fee, tx_est_size);
|
||||
if (!protectButton(ButtonRequestType_ButtonRequest_FeeOverThreshold, false)) {
|
||||
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Fee over threshold. Signing cancelled.");
|
||||
layoutHome();
|
||||
return;
|
||||
}
|
||||
}
|
||||
// last confirmation
|
||||
layoutConfirmTx(coin, to_spend - change_spend, fee);
|
||||
if (!protectButton(ButtonRequestType_ButtonRequest_SignTx, false)) {
|
||||
fsm_sendFailure(FailureType_Failure_ActionCancelled, "Signing cancelled by user");
|
||||
signing_abort();
|
||||
return;
|
||||
}
|
||||
send_req_4_output();
|
||||
idx1 = 0;
|
||||
send_req_5_output();
|
||||
}
|
||||
}
|
||||
return;
|
||||
case STAGE_REQUEST_4_OUTPUT:
|
||||
case STAGE_REQUEST_5_OUTPUT:
|
||||
progress++;
|
||||
if (compile_output(coin, root, tx->outputs, &bin_output, false) <= 0) {
|
||||
if (compile_output(coin, root, tx->outputs, &bin_output,false) <= 0) {
|
||||
fsm_sendFailure(FailureType_Failure_Other, "Failed to compile output");
|
||||
signing_abort();
|
||||
return;
|
||||
@ -500,9 +582,9 @@ void signing_txack(TransactionType *tx)
|
||||
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 (idx4o < outputs_count - 1) {
|
||||
idx4o++;
|
||||
send_req_4_output();
|
||||
if (idx1 < outputs_count - 1) {
|
||||
idx1++;
|
||||
send_req_5_output();
|
||||
} else {
|
||||
send_req_finished();
|
||||
signing_abort();
|
||||
|
||||
@ -1 +1 @@
|
||||
Subproject commit 54aa5a4482eaf6f11c0c6941be5e34aa3a5ff5e2
|
||||
Subproject commit f4fe7c9aa5e85ec3898ce07a5af5fc99bb8f5de4
|
||||
Loading…
Reference in New Issue
Block a user