Re: [hash2] Question about cryptographic guarantees of hash_append_unordered_range

From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2024-12-08 20:04:47

El 08/12/2024 a las 20:49, Vinnie Falco via Boost escribió:
> On Sun, Dec 8, 2024 at 11:44 AM Peter Dimov via Boost <boost_at_[hidden]>
> wrote:
> 
>> Matt Borland is considering proposing boost::uint128_t to Core, but that
>> would mean depending on Core.
>>
> 
> Would it be better to make this its own library? More fine-grained
> libraries could have appeal to Boost users.

I wouldn't like to add another dependency to the library users.

Wouldn't be acceptable to take all the bits from the hash, treat the 
hash as an array 64 bit or 32 bits hashes and apply something like 
hash_combine or similar to each element so that we combine big hashes 
preserving all bits from result_type?

This would also scale to 512 bit or bigger hashes.

Best,

Ion