| // Copyright 2017 Google Inc. |
| // |
| // 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.google.crypto.tink.testing; |
| |
| import com.google.crypto.tink.KeysetHandle; |
| import com.google.crypto.tink.PublicKeySign; |
| |
| /** |
| * A command-line utility for testing PublicKeySign-primitives. |
| * It requires 3 arguments: |
| * keyset-file: name of the file with the keyset to be used for signing |
| * message-file: name of the file that contains message to be signed |
| * output-file: name of the output file for the resulting plaintext |
| */ |
| public class PublicKeySignCli { |
| public static void main(String[] args) throws Exception { |
| if (args.length != 3) { |
| System.out.println( |
| "Usage: PublicKeySignCli keyset-file message-file output-file"); |
| System.exit(1); |
| } |
| String keysetFilename = args[0]; |
| String messageFilename = args[1]; |
| String outputFilename = args[2]; |
| System.out.println("Using keyset from file " + keysetFilename |
| + " to sign message from " + messageFilename + "."); |
| System.out.println("The resulting signature will be written to file " + outputFilename); |
| |
| // Init Tink. |
| CliUtil.initTink(); |
| |
| // Read the keyset. |
| System.out.println("Reading the keyset..."); |
| KeysetHandle keysetHandle = CliUtil.readKeyset(keysetFilename); |
| |
| // Get the primitive. |
| System.out.println("Getting the primitive..."); |
| PublicKeySign pkSign = keysetHandle.getPrimitive(PublicKeySign.class); |
| |
| // Read the message. |
| byte[] message = CliUtil.read(messageFilename); |
| |
| // Compute the signature. |
| System.out.println("Signing..."); |
| byte[] signature = pkSign.sign(message); |
| |
| // Write the signature to the output file. |
| CliUtil.write(signature, outputFilename); |
| |
| System.out.println("All done."); |
| } |
| |
| private PublicKeySignCli() {} |
| } |