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/*
 * Copyright (c) 2000, 2024, Oracle and/or its affiliates.
 *
 * Licensed under the Universal Permissive License v 1.0 as shown at
 * https://oss.oracle.com/licenses/upl.
 */
package com.oracle.coherence.client;

import com.oracle.coherence.common.net.SSLSocketProvider;
import com.tangosol.coherence.config.builder.SocketProviderBuilder;
import com.tangosol.internal.net.ssl.SSLContextDependencies;
import com.tangosol.net.SocketProviderFactory;
import io.grpc.ChannelCredentials;
import io.grpc.InsecureChannelCredentials;
import io.grpc.netty.NettySslContextChannelCredentials;

/**
 * A helper class to resolve gRPC credentials.
 */
public class CredentialsHelper
    {
    /**
     * Private constructor for utility class.
     */
    private CredentialsHelper()
        {
        }

    /**
     * Create the {@link ChannelCredentials} to use for the client channel.
     *
     * @param socketBuilder  the channel {@link SocketProviderBuilder}
     *
     * @return the {@link ChannelCredentials} to use for the client channel.
     */
    public static ChannelCredentials createChannelCredentials(SocketProviderBuilder socketBuilder)
        {
        if (socketBuilder != null)
            {
            SocketProviderFactory.Dependencies              depsFactory = socketBuilder.getDependencies();
            String                                          sSocketId   = socketBuilder.getId();
            SocketProviderFactory.Dependencies.ProviderType type        = depsFactory.getProviderType(sSocketId);

            if (type == SocketProviderFactory.Dependencies.ProviderType.GRPC)
                {
                return InsecureChannelCredentials.create();
                }

            SSLSocketProvider.Dependencies dependencies = depsFactory.getSSLDependencies(sSocketId);
            if (dependencies != null)
                {
                SSLContextDependencies sslContextDependencies = dependencies.getSSLContextDependencies();
                RefreshableSslContext  sslContext             = new RefreshableSslContext(sslContextDependencies, false);
                return NettySslContextChannelCredentials.create(sslContext);
                }
            }
        return InsecureChannelCredentials.create();
        }
    }