sshd-core/src/main/java/org/apache/sshd/server/kex/DHGEXServer.java [202:219]:
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            KeyPair kp = Objects.requireNonNull(session.getHostKey(), "No server key pair available");
            String algo = session.getNegotiatedKexParameter(KexProposalOption.SERVERKEYS);
            Signature sig = ValidateUtils.checkNotNull(
                    NamedFactory.create(session.getSignatureFactories(), algo),
                    "Unknown negotiated server keys: %s", algo);
            sig.initSigner(session, kp.getPrivate());

            buffer = new ByteArrayBuffer();
            buffer.putRawPublicKey(kp.getPublic());

            byte[] k_s = buffer.getCompactData();

            buffer.clear();
            buffer.putBytes(v_c);
            buffer.putBytes(v_s);
            buffer.putBytes(i_c);
            buffer.putBytes(i_s);
            buffer.putBytes(k_s);
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sshd-core/src/main/java/org/apache/sshd/server/kex/DHGServer.java [146:163]:
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        KeyPair kp = Objects.requireNonNull(session.getHostKey(), "No server key pair available");
        String algo = session.getNegotiatedKexParameter(KexProposalOption.SERVERKEYS);

        Signature sig = ValidateUtils.checkNotNull(
                NamedFactory.create(session.getSignatureFactories(), algo),
                "Unknown negotiated server keys: %s", algo);
        sig.initSigner(session, kp.getPrivate());

        buffer = new ByteArrayBuffer();
        buffer.putRawPublicKey(kp.getPublic());
        byte[] k_s = buffer.getCompactData();

        buffer.clear();
        buffer.putBytes(v_c);
        buffer.putBytes(v_s);
        buffer.putBytes(i_c);
        buffer.putBytes(i_s);
        buffer.putBytes(k_s);
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