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google-labs-jules[bot]andPR0M3TH3AN
d8720e83f5
- Add PROTOCOL_INVENTORY.md - Add reports/protocol/protocol-report-2026-02-26.md - Add src/tests/test_bip85_compliance.py - Update KNOWN_ISSUES.md - Update memory-update.md - Add torch/task-logs/daily/2026-02-26T03-14-42Z__protocol-research-agent__completed.md Co-authored-by: PR0M3TH3AN <[email protected]>
57 lines
1.9 KiB
Python
57 lines
1.9 KiB
Python
import sys
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from pathlib import Path
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# Add src to path
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sys.path.append(str(Path(__file__).resolve().parents[2] / "src"))
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from bip_utils import Bip39SeedGenerator # noqa: E402
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from local_bip85.bip85 import BIP85 # noqa: E402
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# Known test vector for:
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# "abandon abandon abandon abandon abandon abandon abandon abandon abandon
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# abandon abandon about"
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# Derived with app_no=2, index=0, entropy_bytes=32
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KNOWN_SYMMETRIC_KEY_HEX = (
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"f8c4bd4d57899c08b083e5d999c5041e1cd05bf6a6cded6e382bd231839cd2d8"
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)
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TEST_SEED_PHRASE = (
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"abandon abandon abandon abandon abandon abandon abandon abandon "
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"abandon abandon abandon about"
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)
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def test_bip85_symmetric_key_stability():
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"""
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Verifies that the BIP85 symmetric key derivation remains stable.
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This test ensures that the custom use of app_no=2 for symmetric keys
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does not change unexpectedly.
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"""
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seed_bytes = Bip39SeedGenerator(TEST_SEED_PHRASE).Generate()
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bip85 = BIP85(seed_bytes)
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key = bip85.derive_symmetric_key(index=0, app_no=2)
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assert key.hex() == KNOWN_SYMMETRIC_KEY_HEX
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def test_bip85_app_no_39_default_behavior():
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"""
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Verifies the behavior when app_no=39 is used directly with derive_entropy.
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The implementation currently defaults word_count to entropy_bytes if
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not provided. This test documents this behavior to detect
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regression/changes.
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"""
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seed_bytes = Bip39SeedGenerator(TEST_SEED_PHRASE).Generate()
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bip85 = BIP85(seed_bytes)
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# Requesting 16 bytes (128 bits) with app_no=39
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# If word_count is None, it defaults to 16.
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# Path becomes m/83696968'/39'/0'/16'/0'
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entropy = bip85.derive_entropy(index=0, entropy_bytes=16, app_no=39)
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assert len(entropy) == 16
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# Verify it is DIFFERENT from explicit 12 words
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# (which uses path .../12'/...)
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entropy_12_words = bip85.derive_entropy(
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index=0, entropy_bytes=16, app_no=39, word_count=12
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)
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assert entropy != entropy_12_words
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