mirror of
https://github.com/trezor/trezor-firmware.git
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120 lines
4.6 KiB
Python
120 lines
4.6 KiB
Python
from common import *
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from trezor.messages import TxInput, SignTx, PrevOutput
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from trezor.enums import InputScriptType
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from trezor.utils import HashWriter
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from apps.zcash.hasher import ZcashHasher, blake2b, write_hash
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from apps.common.coininfo import by_name
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ZCASH_COININFO = by_name("Zcash")
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# NOTE: moved into tests not to occupy flash space
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# in firmware binary, when it is not used in production
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def txid_digest(hasher: "ZcashHasher") -> bytes:
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"""
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Returns the transaction identifier.
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see: https://zips.z.cash/zip-0244#id4
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"""
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h = HashWriter(blake2b(outlen=32, personal=hasher.tx_hash_person))
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write_hash(h, hasher.header.digest()) # T.1
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write_hash(h, hasher.transparent.digest()) # T.2
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write_hash(h, hasher.sapling.digest()) # T.3
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write_hash(h, hasher.orchard.digest()) # T.4
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return h.get_digest()
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@unittest.skipUnless(not utils.BITCOIN_ONLY, "altcoin")
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class TestZcashSigHasher(unittest.TestCase):
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def test_zcash_hasher(self):
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# this test vector was generated using
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# https://github.com/zcash-hackworks/zcash-test-vectors
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tx = SignTx(
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coin_name="Zcash",
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version=5,
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version_group_id=648488714,
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branch_id=928093729,
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lock_time=2591264634,
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expiry=36466477,
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inputs_count=3,
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outputs_count=3,
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)
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inputs = [
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TxInput(
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prev_hash=unhexlify("4f61d91843ccb386dd1c482169eef62efaaf9d9364b1666e4d4c299e04a852e1"),
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prev_index=1569726664,
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multisig=None,
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amount=1249971475008092,
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script_type=InputScriptType.SPENDADDRESS,
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sequence=0x8849f2a3,
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script_pubkey=unhexlify("76a9149466817faf329208fc3c3ef42ce4513d22fc1f9b88ac"),
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),
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TxInput(
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prev_hash=unhexlify("368e9c7e1fe01f6c54db9379a94c2941ef180c25b869bf8dcdb1cf014253b3c7"),
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prev_index=2648876502,
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multisig=None,
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amount=1353789347081201,
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script_type=InputScriptType.SPENDADDRESS,
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sequence=0x8a37691c,
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script_pubkey=unhexlify("76a9142275979f97043edd9a6083ee27d136727ce5f42888ac"),
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),
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TxInput(
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prev_hash=unhexlify("f5621d6ad566c13dce81632a9168694bb6bcec2f7bfac2626f9425e1640fe4f1"),
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prev_index=492165032,
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multisig=None,
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amount=1672802384749611,
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script_type=InputScriptType.SPENDADDRESS,
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sequence=0x6a993d20,
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script_pubkey=unhexlify("76a914682c89bfc3940621bd4a4bfc349a79b46ce707e388ac"),
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),
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]
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outputs = [
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PrevOutput(
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amount=865034086766210,
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script_pubkey=unhexlify("76a9140d06a745f44ab023752cb5b406ed8985e18130ab88ac"),
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),
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PrevOutput(
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amount=2088955338922857,
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script_pubkey=unhexlify("76a91463ccb8f676495c222f7fba1e31defa3d5a57efc288ac"),
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),
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PrevOutput(
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amount=1760123755646275,
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script_pubkey=unhexlify("76a914fb1a38e01d94903d3c3e0ad3360c1d3710acd20b88ac"),
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),
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]
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pubkeys = [
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unhexlify("02ed9c769c787fda78a7da13764707d14217e74e26428b47a2a8fe6d5a0bc46196"),
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unhexlify("0219ac5de9a45f76e7efede5259acd94bb047ab8e7cc60fe844cb32317072ebbf3"),
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unhexlify("02829099a7cf1f617c956c0222e7b77ae331813d6a736eab3c5f6344d961843d39"),
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]
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expected_txid = unhexlify("c91d34ecc44484b07ee573f385d80e57e4e57571bb86aa6ec6c44d654123e4e9")
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expected_sighashes = [
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unhexlify("4d82669c8c0e9b1f26d59bcb347212f2d044eeb839fce21e039d8bb082bbc343"),
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unhexlify("2e2a27d78d117e28760d3c972f9614547ec57688c970f06c19c515cded6b030c"),
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unhexlify("d0a92ffd4a4d262f5b84598bcfca741a42c17b8e9d26cf4fd87839df8f33e4ee"),
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]
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hasher = ZcashHasher(tx)
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for txi in inputs:
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hasher.add_input(txi, txi.script_pubkey)
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for txo in outputs:
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hasher.add_output(txo, txo.script_pubkey)
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# test ZcashSigHasher.txid_digest
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computed_txid = txid_digest(hasher)
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self.assertEqual(computed_txid, expected_txid)
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# test ZcashSigHasher.signature_digest
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for txi, expected_sighash, pk in zip(inputs, expected_sighashes, pubkeys):
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computed_sighash = hasher.signature_digest(
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txi, txi.script_pubkey
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)
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self.assertEqual(computed_sighash, expected_sighash)
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if __name__ == "__main__":
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unittest.main()
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