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doc: suggest checkHost in checkServerIdentity docs #42495

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Mar 29, 2022
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doc: suggest checkHost in checkServerIdentity docs #42495

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6 changes: 6 additions & 0 deletions doc/api/tls.md
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Expand Up @@ -1525,6 +1525,11 @@ Verifies the certificate `cert` is issued to `hostname`.
Returns {Error} object, populating it with `reason`, `host`, and `cert` on
failure. On success, returns {undefined}.

This function is intended to be used in combination with the
`checkServerIdentity` option that can be passed to [`tls.connect()`][] and as
such operates on a [certificate object][]. For other purposes, consider using
[`x509.checkHost()`][] instead.

This function can be overwritten by providing an alternative function as the
`options.checkServerIdentity` option that is passed to `tls.connect()`. The
overwriting function can call `tls.checkServerIdentity()` of course, to augment
Expand Down Expand Up @@ -2257,6 +2262,7 @@ added: v11.4.0
[`tls.createServer()`]: #tlscreateserveroptions-secureconnectionlistener
[`tls.getCiphers()`]: #tlsgetciphers
[`tls.rootCertificates`]: #tlsrootcertificates
[`x509.checkHost()`]: crypto.md#x509checkhostname-options
[asn1.js]: https://www.npmjs.com/package/asn1.js
[certificate object]: #certificate-object
[cipher list format]: https://www.openssl.org/docs/man1.1.1/man1/ciphers.html#CIPHER-LIST-FORMAT
Expand Down