Fix handling of empty subject names in certs#102
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kspearrin
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Mar 11, 2021
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Aug 28, 2025
Fix handling of empty subject names in certs
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Objective
Node had a bug which would reject public certificates as empty if their subject was empty, even if they had altNames defined. See nodejs/node#22906.
This bug was fixed in node 12.14.1. Our electron version uses a later node version, so it doesn't affect the electron app.
However, the
bwdcCLI uses the locally installed node version, so users on older node versions are still susceptible.Code changes
The bug resides in node's TLS
checkServerIdentityfunction. We can provide our owncheckServerIdentityfunction in theldapjsclient options. Our function works by inserting a non-null subject line before calling the standard function.This is based on auth0's workaround which I have referenced in the comment. (Let me know if this is unnecessary.)
Testing
This now correctly validates a test certificate (provided by a customer) with an empty subject and altNames defined, in node v12.0 (pre-bugfix). I have also tested on v14.15.4 to make sure it doesn't interfere with later versions of Node (post-bugfix).