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https://issues.apache.org/jira/browse/HADOOP-19869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18075552#comment-18075552
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ASF GitHub Bot commented on HADOOP-19869:
-----------------------------------------
steveloughran opened a new pull request, #8453:
URL: https://github.com/apache/hadoop/pull/8453
### Description of PR
HADOOP-19869 Modernize secret manager default algorithm and key length
HmacSHA256 and 256 bits.
Also import directly the algorithm in different modules, so it is consistent.
Contains content generated by Coplot + Claude Sonnet 4.6
### How was this patch tested?
updated test
### For code changes:
- [X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
### AI Tooling
If an AI tool was used:
- [X] The PR includes the phrase "Contains content generated by <tool>"
where <tool> is the name of the AI tool used.
- [X] My use of AI contributions follows the ASF legal policy
https://www.apache.org/legal/generative-tooling.html
> Modernize secret manager default algorithm and key length
> ---------------------------------------------------------
>
> Key: HADOOP-19869
> URL: https://issues.apache.org/jira/browse/HADOOP-19869
> Project: Hadoop Common
> Issue Type: Improvement
> Components: security
> Affects Versions: 3.5.0, 3.4.3
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
>
> While doing other cleanup, I've noticed that the default checksum algorithm
> and key length for generating secrets (block tokens, job tokens) are out of
> date by modern standards. Not broken, just weak.
> Change the defaults to sha256 and 256 bits.
> Note that Sha 256 is becoming more vulnerable; not worrying about that as
> these are ephemeral secrets
> [https://stateofutopia.com/papers/2/we-broke-92-percent-of-sha-256.html]
> This is the same as setting
> {{hadoop.security.secret-manager.key-length 256}}
> {{hadoop.security.secret-manager.key-generator.algorithm HmacSHA256}}
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