mirror of
https://github.com/trezor/trezor-firmware.git
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108 lines
3.1 KiB
Python
108 lines
3.1 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2022 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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import typing as t
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import pytest
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from trezorlib.merkle_tree import (
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Leaf,
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MerkleTree,
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Node,
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evaluate_proof,
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internal_hash,
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leaf_hash,
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)
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NODE_VECTORS = ( # node, expected_hash
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( # leaf node
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Leaf(b"hello"),
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"8a2a5c9b768827de5a9552c38a044c66959c68f6d2f21b5260af54d2f87db827",
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),
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( # node with leaf nodes
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Node(left=Leaf(b"hello"), right=Leaf(b"world")),
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"24233339aadcedf287d262413f03c028eb8db397edd32a2878091151b99bf20f",
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),
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( # asymmetric node with leaf hanging on second level
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Node(left=Node(left=Leaf(b"hello"), right=Leaf(b"world")), right=Leaf(b"!")),
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"c3727420dc97c0dbd89678ee195957e44cfa69f5759b395a07bc171b21468633",
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),
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)
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MERKLE_TREE_VECTORS = (
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( # one value
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# values
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[b"Merkle"],
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# expected root hash
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leaf_hash(b"Merkle"),
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# expected dict of proof lists
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{
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b"Merkle": [],
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},
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),
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( # two values
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# values
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[b"Haber", b"Stornetta"],
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# expected root hash
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internal_hash(
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leaf_hash(b"Haber"),
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leaf_hash(b"Stornetta"),
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),
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# expected dict of proof lists
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{
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b"Haber": [leaf_hash(b"Stornetta")],
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b"Stornetta": [leaf_hash(b"Haber")],
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},
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),
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( # three values
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# values
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[b"Andersen", b"Wuille", b"Maxwell"],
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# expected root hash
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internal_hash(
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internal_hash(
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leaf_hash(b"Maxwell"),
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leaf_hash(b"Wuille"),
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),
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leaf_hash(b"Andersen"),
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),
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# expected dict of proof lists
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{
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b"Andersen": [internal_hash(leaf_hash(b"Maxwell"), leaf_hash(b"Wuille"))],
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b"Maxwell": [leaf_hash(b"Wuille"), leaf_hash(b"Andersen")],
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b"Wuille": [leaf_hash(b"Maxwell"), leaf_hash(b"Andersen")],
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},
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),
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)
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@pytest.mark.parametrize("node, expected_hash", NODE_VECTORS)
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def test_node(node: t.Union[Node, Leaf], expected_hash: str) -> None:
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assert node.tree_hash.hex() == expected_hash
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@pytest.mark.parametrize("values, root_hash, proofs", MERKLE_TREE_VECTORS)
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def test_tree(
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values: t.List[bytes],
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root_hash: bytes,
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proofs: t.Dict[bytes, t.List[bytes]],
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) -> None:
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mt = MerkleTree(values)
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assert mt.get_root_hash() == root_hash
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for value, proof in proofs.items():
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assert mt.get_proof(value) == proof
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assert evaluate_proof(value, proof) == root_hash
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