Why Doesn\'t Java Send My Client Certificate During an SSL Handshake?

Why doesn't Java send the client certificate during SSL handshake?

Java poses specific challenges during SSL handshakes when it comes to sending client certificates. One common issue arises when the server requests a client certificate signed by a specific Certificate Authority (CA), but Java only finds a client certificate signed by a subordinate CA in the keystore. This can lead to Java overlooking the certificate chain and not sending any certificate, resulting in a handshake failure.

To resolve this, it's crucial to ensure that the intermediate CA certificate is properly imported into the keystore and associated with the entry containing the client certificate and its private key. By using keytool commands, you can verify this association and import the client certificate and its complete chain into the correct keystore alias that holds the private key.

Additionally, it's worth considering whether the server's configuration is contributing to the issue. Contacting the third-party server administrator may be necessary to determine their expectations regarding the client certificate's signing authority.

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