doc: clarify CRYPTO_CUSTOM_ENGINE_NOT_SUPPORTED

The error is not necessarily due to a client certificate engine. For example, the `privateKeyEngine` option might just as well cause this error and is independent of the client certificate. Also mention that this is likely due to a compile-time option of OpenSSL itself and not due to any particular engine. PR-URL: #47976 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]>
nodejs · May 30, 2023 · 3b94a73 · 3b94a73
1 parent ac8dd61
commit 3b94a73
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/doc/api/errors.md b/doc/api/errors.md
@@ -861,8 +861,9 @@ size is reached when the context is created.
 
 ### `ERR_CRYPTO_CUSTOM_ENGINE_NOT_SUPPORTED`
 
-A client certificate engine was requested that is not supported by the version
-of OpenSSL being used.
+An OpenSSL engine was requested (for example, through the `clientCertEngine` or
+`privateKeyEngine` TLS options) that is not supported by the version of OpenSSL
+being used, likely due to the compile-time flag `OPENSSL_NO_ENGINE`.
 
 <a id="ERR_CRYPTO_ECDH_INVALID_FORMAT"></a>