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fix(Server): set tls.DEFAULT_ECDH_CURVE to 'auto' #1531

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merged 2 commits into from Oct 23, 2018

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nekolab
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@nekolab nekolab commented Oct 17, 2018

  • This is a bugfix
  • This is a code refactor
  • This is a test update
  • This is a typo fix
  • This is a metadata update

The default value of tls.DEFAULT_ECDH_CURVE is 'prime256v1',
it breaks the connection when certificate is not compatible
with the default curve since node^8.6.0.

To fix this issue, we need set it to 'auto', makes OpenSSL
select the curve automatically.

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jsf-clabot commented Oct 17, 2018

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@alexander-akait
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@nekolab on node@10 all works fine, right?

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codecov bot commented Oct 18, 2018

Codecov Report

Merging #1531 into master will increase coverage by <.01%.
The diff coverage is 80%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master    #1531      +/-   ##
==========================================
+ Coverage   74.02%   74.02%   +<.01%     
==========================================
  Files          10       10              
  Lines         666      670       +4     
==========================================
+ Hits          493      496       +3     
- Misses        173      174       +1
Impacted Files Coverage Δ
lib/Server.js 81.36% <80%> (-0.08%) ⬇️

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@nekolab
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nekolab commented Oct 18, 2018

@evilebottnawi
Yes, node@10 default tls. DEFAULT_ECDH_CURVE to auto
Seems this change breaks node@6, so I've added some version check

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@nekolab thanks!

@michael-ciniawsky michael-ciniawsky changed the title fix(Server): Set tls.DEFAULT_ECDH_CURVE to 'auto' fix(Server): set tls.DEFAULT_ECDH_CURVE to 'auto' Oct 18, 2018
lib/Server.js Outdated
// breaking connection when certificate is not signed with prime256v1
// change it to auto allows OpenSSL to select the curve automatically
// See https://github.com/nodejs/node/issues/16196 for more infomation
const verMatch = process.version.match(/^v(\d+).(\d+)/);
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Is the version check required here or could this be defaulted to 'auto' in general? E.g was this being 'reverted' for node >= 10.0.0 for some reason? If so, why?

Suggested change
const verMatch = process.version.match(/^v(\d+).(\d+)/);
const version = process.version.match(/^v(\d+).(\d+)/);

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node v9.0.0 is EOL

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Just saw #1531 (comment) Hmm....

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@michael-ciniawsky node@8 also affected

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const version = parseFloat(process.version.slice(1))

if (10 > version && version >= 8.6) {
  ...
}

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@michael-ciniawsky node@10 is not affected

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Thanks for guiding, I've update the code and please take a look again.

There is another place using regex to match the version, I've changed it too

The default value of tls.DEFAULT_ECDH_CURVE is 'prime256v1',
it breaks the connection when certificate is not compatible
with the default curve since node 8.6.0.

To fix this issue, we need set it to 'auto', makes OpenSSL
select the curve automatically.
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@nekolab Thx

This was referenced Mar 13, 2021
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4 participants