fix: Change encoding from HMAC to AES when setting secret key

[auden-woolfson]

Description

This is required to stop failures on the refresh token secret key property

Motivation and Context

Impact

Test Plan

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Release Notes

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== RELEASE NOTES ==

General Changes
* Change encoding of refresh token secret key to AES

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates RefreshTokensConfig to interpret provided Base64-encoded secret keys as raw AES keys instead of HMAC-SHA keys, addressing failures in refresh token secret key property.

Class diagram for updated RefreshTokensConfig secret key handling

classDiagram
    class RefreshTokensConfig {
        -SecretKey secretKey
        +RefreshTokensConfig setSecretKey(String key)
    }
    class SecretKeySpec {
        +SecretKeySpec(byte[] key, String algorithm)
    }
    RefreshTokensConfig --> SecretKeySpec : uses for AES key

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Flow diagram for secret key encoding change from HMAC to AES

flowchart TD
    A["Base64-encoded key input"] --> B["Decode key bytes"]
    B --> C["Create SecretKeySpec with AES algorithm"]
    C --> D["Assign to secretKey property"]

Loading

File-Level Changes

Change	Details	Files
Switch refresh token secret key decoding from HMAC to AES	Removed Keys.hmacShaKeyFor and its HMAC-based key derivation Replaced with new SecretKeySpec using algorithm "AES" Continued decoding the key bytes via Decoders.BASE64.decode Kept method signature and fluent return style	presto-main/src/main/java/com/facebook/presto/server/security/oauth2/RefreshTokensConfig.java

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[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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[tdcmeehan]

The corresponding Trino PR had a test, is it applicable here, and if so could you add it? trinodb/trino@3c687c3

[yhwang]

Just left a minor question, and the changes look good to me

[yhwang]

/LGTM