URL signing failed in IBM WebSphere when using RSA key (6271087)

When using an RSA key in IBM WebSphere, the signing of URL string failed with the following exception:

ERROR: FSSignatureUtil.signAndReturnQueryString: FSSignatureException 
occured while signing query string: no such provider: SunRsaSign

Workaround:The “SunRsaSign” provider is missing from the WebSphere bundled JDK. To fix this problem, edit the websphere_jdk_root/jre/lib/security/java.security file and add following line to enable “SunRsaSign” as one of the providers:

security.provider.6=com.sun.rsajca.Provider