Using a key from a string

[Some Guy]

Hi, I'm trying to load keys from a string then perform operations but
I'm obviously doing it wrong. This is just using sample code from the
Crypto++ wiki except for the key loading which I've changed and is
wrong. Can someone tell me how I should be doing it please?

Any help is much appreciated, next thing I'm trying is generating the
keys with crypto++ rather than the online generator I was using.

std::string pub_key =
"AAAAB3NzaC1yc2EAAAABJQAAAIEAofcO32Qko4srylZRXQywJqWt4msjzrilwIntr21mjZM8vQ3pTsM/
GWW+nQzAAGp0JPanYbJN7f3HGwF7z8V51cq41PJKnAwJDayoj5eOEM8iIpgZaoowT
+jfn25Q2+55oEpQz41LdvZoLZ4s58JI30r9byWWlTwen9+JwGFcJ3c==";
        std::string priv_key = "AAAAgEYJ+Jfz9CsLv
+jLYXRYg4ZVe6AuVKxrhfJlKIM2Oi9iQ8df9i/lumvY+HtD"
                                                        
"yKY73zKULLSgIbMF9TwcUTdAo2KqKpX
+phAZNXEXjCB14JSXObhkJvm8ak5kdDSj"
                                                        "SZIGIRTPueonhvvya
+tzxmvVpQLpxezlMx6LppzPJxJ8tF6tAAAAQQD96+ATzVro"
                                                        
"D01/N8ULQNOhCzdpudjtAxFjJWSlt7yhNLMFfXdh7q/
ihRYIsbEBgI7lmq6ISmFc"
                                                        
"HBgfahbXldH/AAAAQQCjSnoBnTvpriqm/L97teWQYXDGxXAZd2k9bYEO/
v2fGG0k"
                                                        
"dWqv9KBzSYcZwF1iurmoyQzLRf09ET0hFU7JZTqJAAAAQBa0//
vmDitumKwJSXXH"
                                                        
"kS84LKn8IM9VJ78VosY49A8f1p8FgEb15xwiuKsI2A3w9LGcqi3KDwUAwXl9y9/
o"
                                                        "Yhs";

    try
    {

        RSA::PrivateKey privateKey;
                privateKey.Load(StringSource(priv_key,true,NULL).Ref());
        RSA::PublicKey publicKey;
                publicKey.Load(StringSource(pub_key,true,NULL).Ref());

        // Message
        string message = "Yoda said, Do or Do Not. There is not try.";
        string signature;

        ////////////////////////////////////////////////
        // Sign and Encode
        RSASS<PSS, SHA1>::Signer signer( privateKey );

        StringSource( message, true,
            new SignerFilter( rng, signer,
                new StringSink( signature )
            ) // SignerFilter
        ); // StringSource

        ////////////////////////////////////////////////
        // Verify and Recover
        RSASS<PSS, SHA1>::Verifier verifier( publicKey );

        StringSource( message+signature, true,
            new SignatureVerificationFilter(
                verifier, NULL,
                SignatureVerificationFilter::THROW_EXCEPTION
            ) // SignatureVerificationFilter
        ); // StringSource

        cout << "Verified signature on message" << endl;

    } // try

    catch( CryptoPP::Exception& e ) {
        std::cerr << "Error: " << e.what() << std::endl;
    }

    return 0;
}

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