> For JWS signing in relation to Letsencrypt (my use case for this > - mKey is a RSA keypair in EVP_PKEY*): My RSA signing is accepted fine by Let's Encrypt, it's trying to use ECDSA keys that fails, despite OpenSSL verifying my JWS signing as ok. Failed to Create Account: urn:ietf:params:acme:error:malformed, JWS verification error But since RSA works, not spent much time looking at it. Angus