RSA: fix regression for PSS signatures
RSA: fix regression for PSS signatures

metaclassing/phpseclib,terrafrost/phpseclib,thaigialai1987/phpseclib,kenichiii/phpseclib,danog/phpseclib,metaclassing/phpseclib,splitice/phpseclib,phpseclib/phpseclib,paragonie-scott/phpseclib,danog/phpseclib,splitice/phpseclib,paragonie-scott/phpseclib,kenichiii/phpseclib,thaigialai1987/phpseclib