Non-Cryptographic Hashes

[JTaylor]

Does the Functions like FileDigest() and BinaryHashRec() do the following or would this be a useful Extender Function?

Jim

Identical across all platforms (little / big endian). The library includes the following algorithms :

    XXH32 : generates 32-bit hashes, using 32-bit arithmetic
    XXH64 : generates 64-bit hashes, using 64-bit arithmetic
    XXH3 (since v0.8.0): generates 64 or 128-bit hashes, using vectorized arithmetic. The 128-bit variant is called XXH128.

All variants successfully complete the SMHasher test suite which evaluates the quality of hash functions (collision, dispersion and randomness).

[td]

FileDigest does not use proprietary hash algorithms. The function documentation lists* the algorithms including several SHA-2 cryptographic hash algorithms designed by the United States National Security Agency (NSA).

Unlike the WinBatch download page**, many Websites list several hashes for each file you download. You may have noticed that those listed hashes parallel hashes supported by FileDigest. That is not a coincidence.

The BinaryHashRec function is used to create hash tables in binary buffers. The hash algorithm it uses is a commonly used hash table algorithm that balances performance and collision avoidance. The hash algorithm is fine for the intended purpose.

*There is runaway bold text in the algorithm parameter of the FileDigest function in the Consolidated Wil Help file documentation for the function. It should get fixed.

**Adding hashes to the download page has been on the to-do list for a long time. This post is another reminder that it needs to get done.