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/*
* Copyright (C) 2018 Square, 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 okio.samples;
import java.io.File;
import java.io.IOException;
import okio.Buffer;
import okio.BufferedSink;
import okio.BufferedSource;
import okio.ByteString;
import okio.HashingSink;
import okio.HashingSource;
import okio.Okio;
import okio.Source;
public final class Hashing {
public void run() throws Exception {
File file = new File("../README.md");
System.out.println("ByteString");
ByteString byteString = readByteString(file);
System.out.println(" md5: " + byteString.md5().hex());
System.out.println(" sha1: " + byteString.sha1().hex());
System.out.println(" sha256: " + byteString.sha256().hex());
System.out.println(" sha512: " + byteString.sha512().hex());
System.out.println();
System.out.println("Buffer");
Buffer buffer = readBuffer(file);
System.out.println(" md5: " + buffer.md5().hex());
System.out.println(" sha1: " + buffer.sha1().hex());
System.out.println(" sha256: " + buffer.sha256().hex());
System.out.println(" sha512: " + buffer.sha512().hex());
System.out.println();
System.out.println("HashingSource");
try (HashingSource hashingSource = HashingSource.sha256(Okio.source(file));
BufferedSource source = Okio.buffer(hashingSource)) {
source.readAll(Okio.blackhole());
System.out.println(" sha256: " + hashingSource.hash().hex());
}
System.out.println();
System.out.println("HashingSink");
try (HashingSink hashingSink = HashingSink.sha256(Okio.blackhole());
BufferedSink sink = Okio.buffer(hashingSink);
Source source = Okio.source(file)) {
sink.writeAll(source);
sink.close(); // Emit anything buffered.
System.out.println(" sha256: " + hashingSink.hash().hex());
}
System.out.println();
System.out.println("HMAC");
ByteString secret = ByteString.decodeHex("7065616e7574627574746572");
System.out.println("hmacSha256: " + byteString.hmacSha256(secret).hex());
System.out.println();
}
public ByteString readByteString(File file) throws IOException {
try (BufferedSource source = Okio.buffer(Okio.source(file))) {
return source.readByteString();
}
}
public Buffer readBuffer(File file) throws IOException {
try (Source source = Okio.source(file)) {
Buffer buffer = new Buffer();
buffer.writeAll(source);
return buffer;
}
}
public static void main(String[] args) throws Exception {
new Hashing().run();
}
}
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