sig.php

        // 7. Create sig
        // This is why we can't have nice things
        if (! defined('OPENSSL_ALGO_SHA256')) define('OPENSSL_ALGO_SHA256', 7);

//        // sign & encrypt the sig
//        var md = forge.md.sha256.create();
//        md.update(body.bytes());
//        var sig = id.private.sign(md);
        openssl_sign($body, $sig, $my_priv_key, OPENSSL_ALGO_SHA256);

//        var md = forge.md.sha256.create();
//        md.update(to.ecc.public.uncompressed);
//        md.update(forge.util.hexToBytes(to.lineOut));
        $ctx = hash_init('sha256');
        hash_update($ctx, $ecc->pubkey);
        hash_update($ctx, hex2bin($to->line));
        $aes_key = hash_final($ctx, true);


//        var cipher = forge.aes.createEncryptionCipher(md.digest(), "CTR");
//        cipher.start(iv);
//        cipher.update(forge.util.createBuffer(sig));
//        cipher.finish();
        $cipher = new \Crypt_AES(CRYPT_AES_MODE_CTR);
        $cipher->setIv($iv);
        $cipher->setKey($aes_key);
        $aes = $cipher->encrypt($sig);

//        open.sig = forge.util.encode64(cipher.output.bytes());
        $sig = base64_encode($aes);