Error: "SSL/TSL Error: The certificate validation failed"
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Article ID: CTX124825
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Updated On:
Description
When connecting to published resource through Citrix Secure Gateway, the ICA Java client reports the following error message:
“SSL/TSL error: The certificate validation failed.”
Resolution
Request or renew a new certificate from the Certificate Authority (CA).
In this case, the client certificate is due to expire and was initially requested while the CA was still issuing Certificates where the Root CA certificate was signed with the MD2 algorithm.
Problem Cause
The Root Certificate for the SSL Certificate that Citrix Secure Gateway uses is signed with the MD2 algorithm. The MD2 algorithm has been disabled in Java JRE 1.6.0_18 and higher.
Issue/Introduction
This article provides a resolution for the error “SSL/TSL error: the certificate validation failed.” reported by ICA Java client when connecting to published resource through Citrix Secure Gateway.
Additional Information
Error Stack Tracecom.citrix.sdk.jsse.CitrixSSLException: The certificate validation failed.
at com.citrix.sdk.jsse.SocketFactory.createSslSocket(Unknown Source)
Figure 1 - SSL Certificate for the site. Certificate path to the root CA

Figure 2 – Root CA in question

Figure 3 – Root CA Certificate is signed with a defunct algorithm.

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