Description: ------------ Crypt_RSA_KeyPair::getPublicKey() returns the private key - not the public key. The fix is to replace this line (in Crypt/RSA/KeyPair.php): $this->_public_key = &$obj; With this: $this->_public_key = $obj; I suppose I could make a PR to do just this but if I did that I'd also need to do a unit test and tbh I don't care enough to do that lol. Test script: --------------- $key_pair = new Crypt_RSA_KeyPair(1024); echo $key_pair->getPrivateKey()->toString() . "\n\n\n"; echo $key_pair->getPublicKey()->toString() . "\n\n\n"; Expected result: ---------------- Should return a private key and a pubic key Actual result: -------------- Returns two private keys.