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Fix CRC-64/XZ polynomial representation in PCF spec #6

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kduma merged 1 commit into from
Jun 2, 2026
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Fix CRC-64/XZ polynomial representation in PCF spec #6

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5 changes: 3 additions & 2 deletions specs/PCF-spec-v1.0.txt
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Expand Up @@ -415,11 +415,12 @@ Table of Contents
refin=true, refout=true, xorout=0xFFFFFFFF.

CRC-64 (ID 3): CRC-64/XZ.
width=64, reflected poly 0x42F0E1EBA9EA3693,
width=64, reflected poly 0xC96C5795D7870F42,
init=0xFFFFFFFFFFFFFFFF, refin=true, refout=true,
xorout=0xFFFFFFFFFFFFFFFF.
(This is the CRC-64 used by xz/liblzma and by .NET
System.IO.Hashing.Crc64. Check value for the ASCII
System.IO.Hashing.Crc64. Normal poly is
0x42F0E1EBA9EA3693. Check value for the ASCII
input "123456789" is 0x995DC9BBDF1939FA.)

SHA-256 (ID 16) is the DEFAULT and RECOMMENDED algorithm. Algorithms with
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