verity/VeritySigner.java

/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * 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.android.verity;

import java.security.PrivateKey;

public class VeritySigner {

    // USAGE:
    //     VeritySigner <contentfile> <key.pem> <sigfile>
    // To verify that this has correct output:
    //     openssl rsautl -raw -inkey <key.pem> -encrypt -in <sigfile> > /tmp/dump
    public static void main(String[] args) throws Exception {
        byte[] content = Utils.read(args[0]);
        PrivateKey privateKey = Utils.loadPEMPrivateKey(Utils.read(args[1]));
        byte[] signature = Utils.sign(privateKey, content);
        Utils.write(signature, args[2]);
    }
}