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Subject: Re: GNAT.SHA256 produces result different from sha257sum on Linux
Date: Sat, 04 Nov 2023 20:26:34 +0100
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Ben Bacarisse <ben.usenet@bsb.me.uk> writes:

> Ah!  You didn't add a newline!  I can get the same hash by guesswork:
>
> $ printf foo\\\\n >input
> $ sha256sum input
> 04e1806fda6bdbc9e5e3534edd993c7c2bf03173f5489742db53d1e8b0ef8c61  input
> $ hd input
> 00000000  66 6f 6f 5c 6e                                    |foo\n|
> 00000005
>
> What you added to the test string was a backslash and a letter n.

Yeah, thanks!  I realized this too by trying to do this in Python:

    >>> import hashlib
    >>> hashlib.sha256('foo'.encode()).hexdigest()
    '2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae'
    >>> hashlib.sha256('foo\n'.encode()).hexdigest()
    'b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c'

Thanks again.