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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.verity;
     18 
     19 import java.security.PublicKey;
     20 import java.security.PrivateKey;
     21 import java.security.Security;
     22 import java.security.cert.X509Certificate;
     23 import org.bouncycastle.jce.provider.BouncyCastleProvider;
     24 
     25 public class VeritySigner {
     26 
     27     private static void usage() {
     28         System.err.println("usage: VeritySigner <contentfile> <key.pk8> " +
     29                 "<sigfile> | <contentfile> <certificate.x509.pem> <sigfile> " +
     30                 "-verify");
     31         System.exit(1);
     32     }
     33 
     34     public static void main(String[] args) throws Exception {
     35         if (args.length < 3) {
     36             usage();
     37             return;
     38         }
     39 
     40         Security.addProvider(new BouncyCastleProvider());
     41 
     42         byte[] content = Utils.read(args[0]);
     43 
     44         if (args.length > 3 && "-verify".equals(args[3])) {
     45             X509Certificate cert = Utils.loadPEMCertificate(args[1]);
     46             PublicKey publicKey = cert.getPublicKey();
     47 
     48             byte[] signature = Utils.read(args[2]);
     49 
     50             try {
     51                 if (Utils.verify(publicKey, content, signature,
     52                             Utils.getSignatureAlgorithmIdentifier(publicKey))) {
     53                     System.err.println("Signature is VALID");
     54                     System.exit(0);
     55                 } else {
     56                     System.err.println("Signature is INVALID");
     57                 }
     58             } catch (Exception e) {
     59                 e.printStackTrace(System.err);
     60             }
     61 
     62             System.exit(1);
     63         } else {
     64             PrivateKey privateKey = Utils.loadDERPrivateKey(Utils.read(args[1]));
     65             byte[] signature = Utils.sign(privateKey, content);
     66             Utils.write(signature, args[2]);
     67         }
     68     }
     69 }
     70