8256660: Disable DTLS 1.0

[seanjmullan]

Disable DTLS 1.0 by default. This version of DTLS has weakened over time and lacks support for stronger cipher suites. DTLS 1.0 correlates with version 1.1 of TLS which has already been disabled by default in JDK 16. The IETF has deprecated this version of DTLS (along with TLS 1.0 and 1.1) in RFC 8996: https://www.rfc-editor.org/rfc/rfc8996.html.

CSR: https://bugs.openjdk.org/browse/JDK-8280507

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change requires a CSR request to be approved

Issues

• JDK-8256660: Disable DTLS 1.0
• JDK-8280507: Disable DTLS 1.0 (CSR)

Reviewers

• Xue-Lei Andrew Fan (@XueleiFan - Reviewer)
• Hai-May Chao (@haimaychao - Committer)
• Bradford Wetmore (@bradfordwetmore - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk pull/10905/head:pull/10905
$ git checkout pull/10905

Update a local copy of the PR:
$ git checkout pull/10905
$ git pull https://git.openjdk.org/jdk pull/10905/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 10905

View PR using the GUI difftool:
$ git pr show -t 10905

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/10905.diff

[bridgekeeper]

👋 Welcome back mullan! 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.

[openjdk]

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

• security

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[mlbridge]

Webrevs

• 00: Full (2dc9b4a9)

[XueleiFan]

Looks good to me.

[haimaychao]

Looks good.

[bradfordwetmore]

LGTM, also.

Took a bit to figure out 1352, but got it now.

[seanjmullan]

/csr

[openjdk]

@seanjmullan an approved CSR request is already required for this pull request.

[openjdk]

@seanjmullan 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:

8256660: Disable DTLS 1.0

Reviewed-by: xuelei, hchao, wetmore

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 32 new commits pushed to the master branch:

• f4d8c20: 8294729: [s390] Implement nmethod entry barriers
• 7e88209: 8295964: Move InstanceKlass::_misc_flags
• 91072ee: 5074006: Swing JOptionPane shows tag as a string after newline
• 274ea1d: 8295993: use K instead of 1024 in a couple of hotspot outputs
• 9b9be88: 8295125: os::signal should be os specific
• f8cc067: 8296087: Problem list headful tests which may fail on Linux VMs
• 2e71637: 8282463: javax/sound/sampled/Clip/DataPusherThreadCheck.java fails
• f3ca0ca: 8293999: [JVMCI] need support for aligned constants in generated code larger than 8 bytes
• 8aa1526: 8285835: SIGSEGV in PhaseIdealLoop::build_loop_late_post_work
• a44ebd5: 8295849: Consolidate Threads::owning_thread*
• ... and 22 more: https://git.openjdk.org/jdk/compare/8e5d680a98ad28eb3607d227783bdea94039dde6...master

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.

[seanjmullan]

/integrate

[openjdk]

Going to push as commit 16744b3.
Since your change was applied there have been 32 commits pushed to the master branch:

• f4d8c20: 8294729: [s390] Implement nmethod entry barriers
• 7e88209: 8295964: Move InstanceKlass::_misc_flags
• 91072ee: 5074006: Swing JOptionPane shows tag as a string after newline
• 274ea1d: 8295993: use K instead of 1024 in a couple of hotspot outputs
• 9b9be88: 8295125: os::signal should be os specific
• f8cc067: 8296087: Problem list headful tests which may fail on Linux VMs
• 2e71637: 8282463: javax/sound/sampled/Clip/DataPusherThreadCheck.java fails
• f3ca0ca: 8293999: [JVMCI] need support for aligned constants in generated code larger than 8 bytes
• 8aa1526: 8285835: SIGSEGV in PhaseIdealLoop::build_loop_late_post_work
• a44ebd5: 8295849: Consolidate Threads::owning_thread*
• ... and 22 more: https://git.openjdk.org/jdk/compare/8e5d680a98ad28eb3607d227783bdea94039dde6...master

Your commit was automatically rebased without conflicts.

[openjdk]

@seanjmullan Pushed as commit 16744b3.

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