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8373677: Clear text HttpServer connection could fail fast if receiving SSL ClientHello

Open dfuch opened this issue 1 month ago • 4 comments

The first byte of a SSL ClientHello handshake record is 0x16 (22). If the first byte received on a HTTP/1.1 clear connection is 0x16, the HTTP server could fail fast, return 400 bad request and immediately close the connection.

This changeset extends the fail fast behaviour for other ineligible bytes, such as any byte corresponding to ASCII characters <= 31.


Progress

  • [ ] Change must be properly reviewed (1 review required, with at least 1 Reviewer)
  • [x] Change must not contain extraneous whitespace
  • [x] Commit message must refer to an issue

Issue

  • JDK-8373677: Clear text HttpServer connection could fail fast if receiving SSL ClientHello (Enhancement - P4)

Reviewing

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dfuch avatar Dec 15 '25 15:12 dfuch

:wave: Welcome back dfuchs! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

bridgekeeper[bot] avatar Dec 15 '25 15:12 bridgekeeper[bot]

@dfuch This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8373677: Clear text HttpServer connection could fail fast if receiving SSL ClientHello

Reviewed-by: jpai, djelinski

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 2 new commits pushed to the master branch:

  • e4636d69e7e41477619a163e97fd3af2e5942dde: 8373420: C2: Add true/false_proj*() methods for IfNode as a replacement for proj_out*(true/false)
  • 9a23f8aa337e1292179625ce9bb8abe22c9e22e2: 8373552: ExactConversionsSupport: bad JLS links in javadoc

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch. As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

openjdk[bot] avatar Dec 15 '25 15:12 openjdk[bot]

@dfuch The following label will be automatically applied to this pull request:

  • net

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

openjdk[bot] avatar Dec 15 '25 15:12 openjdk[bot]

Webrevs

mlbridge[bot] avatar Dec 15 '25 17:12 mlbridge[bot]

/integrate

dfuch avatar Dec 17 '25 12:12 dfuch

Going to push as commit 5e7ae281326ca306339aaba101d4206dffdb9ca0. Since your change was applied there have been 2 commits pushed to the master branch:

  • e4636d69e7e41477619a163e97fd3af2e5942dde: 8373420: C2: Add true/false_proj*() methods for IfNode as a replacement for proj_out*(true/false)
  • 9a23f8aa337e1292179625ce9bb8abe22c9e22e2: 8373552: ExactConversionsSupport: bad JLS links in javadoc

Your commit was automatically rebased without conflicts.

openjdk[bot] avatar Dec 17 '25 12:12 openjdk[bot]

@dfuch Pushed as commit 5e7ae281326ca306339aaba101d4206dffdb9ca0.

:bulb: You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

openjdk[bot] avatar Dec 17 '25 12:12 openjdk[bot]