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Venice, a sandboxed Lisp implemented in Java.

There is a newer version: 1.12.34

/*   __    __         _
 *   \ \  / /__ _ __ (_) ___ ___
 *    \ \/ / _ \ '_ \| |/ __/ _ \
 *     \  /  __/ | | | | (_|  __/
 *      \/ \___|_| |_|_|\___\___|
 *
 *
 * Copyright 2017-2024 Venice
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.jlangch.venice.examples;

import com.github.jlangch.venice.SecurityException;
import com.github.jlangch.venice.Venice;
import com.github.jlangch.venice.javainterop.SandboxInterceptor;
import com.github.jlangch.venice.javainterop.SandboxRules;


public class Embed_10_CustomMinimalSandbox {

    public static void main(final String[] args) {
        final SandboxInterceptor sandbox =
                new SandboxRules()
                    // Venice functions: blacklist all unsafe functions
                    .rejectAllUnsafeFunctions()

                    // Venice functions: whitelist rules for print functions to offset
                    // blacklist rules by individual functions
                    .whitelistVeniceFunctions("*print*")

                    .sandbox();

        final Venice venice = new Venice(sandbox);


        // => OK, 'println' is part of the unsafe functions, but enabled by the 2nd rule
        venice.eval("(println 100)");

        // => FAIL, 'read-line' is part of the unsafe functions
        try {
            venice.eval("(read-line)");
        }
        catch(SecurityException ex) {
            System.out.println("REJECTED: (read-line)");
        }
    }

}