JMR-devandClaude Opus 4.8
d407298be4
- Cover the new utilities helpers (unpad, crc32, checksumPid type preservation, pidFromSerial, safe_join) and drop the now-redundant per-module crc32 tests. - Rename test_unpad_removes_pkcs7_padding to reflect that unpad only trusts the trailing pad-length byte rather than validating PKCS#7. - Replace the KOBO_HASH_KEYS change-detector with a test that documents the intentional value pin and checks the ASCII-salt contract. - Note kgenpids' hybrid import in the test-loader docstring. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
36 lines
984 B
Python
36 lines
984 B
Python
"""Tests for Kindle PID generation helpers (kgenpids)."""
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import dedrm_test_utils as U
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kg = U.load("kgenpids")
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def test_encode_known_vector():
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assert kg.encode(b"\x00\x01\x42\xff\x80", kg.charMap1) == b"6n65tPrMnn"
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def test_encode_doubles_length():
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data = b"\x10\x20\x30"
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assert len(kg.encode(data, kg.charMap1)) == 2 * len(data)
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def test_two_bits_from_bit_field():
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assert [kg.getTwoBitsFromBitField(b"\x1b\x2c\x3d\x4e", i) for i in range(4)] == [0, 1, 2, 3]
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def test_six_bits_from_bit_field():
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assert kg.getSixBitsFromBitField(b"\xff\xff\xff\xff", 0) == 63
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def test_pid_encryption_table_is_crc32_table():
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table = kg.generatePidEncryptionTable()
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assert len(table) == 256
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assert table[0] == 0
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# Standard reflected CRC-32 table entry.
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assert table[1] == 0x77073096
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def test_generate_device_pid_known_vector():
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table = kg.generatePidEncryptionTable()
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assert kg.generateDevicePID(table, b"\x12\x34\x56\x78", 4) == b"22I8IQVF"
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