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2893335 - AS Java TLS handshake failure - unsupported extension

Symptom

A TLS connection from the AS Java using the IAIK library fails with the following trace, considering that the TLS version is supported by the target server:

Begin IAIK Debug:
ssl_debug(7): Starting handshake (iSaSiLk 5.106)...
ssl_debug(7): Sending v3 client_hello message to <hostname>:<port>, requesting version 3.3...
ssl_debug(7): Sending extensions: renegotiation_info (<XXXXX>), signature_algorithms (<XX>), server_name (<X>)
ssl_debug(7): Received v3 server_hello handshake message.
ssl_debug(7): SSLException while handshaking: Server has sent unrequested extension: unknown (<XX>)
ssl_debug(7): Sending alert: Alert Fatal: unsupported extension
ssl_debug(7): Shutting down SSL layer...
ssl_debug(7): Closing transport...


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Environment

SAP NetWeaver Application Server Java all versions

Product

SAP NetWeaver Application Server for Java all versions

Keywords

sslcontext.properties, SSL config file, ECDHE, ECDSA, cipher suites, cipher suite, handshake failure, elliptic curve algorithms, elliptic curve, elliptic , KBA , BC-JAS-SEC-CPG , Cryptography , Problem

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