Enhancements for rustls-cng crate

[MS-megliu]

(1) store::CertStore - New find_by_sha256()
(2) signer::CngSigner – Update hash() using BCryptHash
(3) cert::Context – Update as_chain_der() to exclude root and check to use HKLM or HKCU.

new test case test_find_by_hash256() added and passed.
cargo test passed.

[MS-megliu]

We removed sha2 and aws-lc-rs dependency in cargo.toml as we don't see they are used. please let us know if aws-lc-rs is needed. Thanks!

[ancwrd1]

@PhilHallin if you don't have any more comments I can merge it.

[PhilHallin]

Hi Dmitry,

The changes look good to me. Megan would prefer to do some additional testing.
However, she is currently busy on another project through the end of 2024.
We will let you make the call if you want to merge now or wait until January 2025.

Thanks again for all your support.

Phil

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In reply to: 2537252222

[PhilHallin]

[ancwrd1]

I will merge it as it is now, feel free to open another PR if some issue is found.

[MS-megliu]

Hi Dmitry,

Thanks very much for all your support!

Happy Holidays!
Megan