How to fix error - ERROR: 'Specified alias is not a private key: com.linoma.commons.crypto.CryptoException', while setting up an AS2 Server in IDMC

 Understanding Problem:

When setting up an AS2 Server in IDMC, you may encounter the error message "ERROR: 'Specified alias is not a private key: com.linoma.commons.crypto.CryptoException: Specified alias is not a private key'". 

Root cause:

The error message "Specified alias is not a private key:" may occur if we keep the Decryption Certificate Alias empty. 

Error message:

2023-05-07 11:22:32,388 IST ERROR [AS2MessageWorker] {https-jsse-nio-1.1.1.1-15400-exec-8} Specified alias is not a private key: com.linoma.commons.crypto.CryptoException: Specified alias is not a private key:

        at com.linoma.dpa.crypto.x509.KeyStoreManager.getPrivateKey(KeyStoreManager.java:750)

        at com.linoma.dpa.ghttps.as2.AS2MessageWorker.decryptData(AS2MessageWorker.java:553)

        at com.linoma.dpa.ghttps.as2.AS2MessageWorker.processMessage(AS2MessageWorker.java:158)

        at com.linoma.dpa.ghttps.servlets.AS2Servlet.doPost(AS2Servlet.java:161)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

Solution: 

You need to provide the decryption alias i.e. private key alias to resolve the issue. Here is screenshot about it

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