Bouncy Castle PQC XMSS signing: NullPointerException after retrieving SecretKey from KeyStore

Question

While rebuilding JarSigner in order to work with PQC Signature Schemes such as XMSS provided by the JCA/JCE Provider BouncyCastle I came across a problem: It seems that XMSS Pri

Answer 1

This is a known issue: https://github.com/bcgit/bc-java/issues/380 Just use a beta version higher than 161b01 as suggested.