com.bitsofproof.supernode.api.BIP39Test.java Source code

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Here is the source code for com.bitsofproof.supernode.api.BIP39Test.java

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/*
 * Copyright 2013 bits of proof zrt.
 *
 * 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.bitsofproof.supernode.api;

import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.io.InputStream;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Arrays;

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.junit.BeforeClass;
import org.junit.Test;

import com.bitsofproof.supernode.common.ByteUtils;
import com.bitsofproof.supernode.common.ValidationException;
import com.bitsofproof.supernode.wallet.BIP39;

public class BIP39Test {
    @BeforeClass
    public static void init() {
        Security.addProvider(new BouncyCastleProvider());
    }

    private static final String TESTS = "BIP39.json";

    private JSONObject readObject(String resource) throws IOException, JSONException {
        InputStream input = this.getClass().getResource("/" + resource).openStream();
        StringBuffer content = new StringBuffer();
        byte[] buffer = new byte[1024];
        int len;
        while ((len = input.read(buffer)) > 0) {
            byte[] s = new byte[len];
            System.arraycopy(buffer, 0, s, 0, len);
            content.append(new String(buffer, "UTF-8"));
        }
        return new JSONObject(content.toString());
    }

    @Test
    public void bip39TrezorTest() throws IOException, JSONException, ValidationException {
        JSONObject testData = readObject(TESTS);
        JSONArray english = testData.getJSONArray("english");
        for (int i = 0; i < testData.length(); ++i) {
            JSONArray test = english.getJSONArray(i);
            String m = BIP39.getMnemonic(ByteUtils.fromHex(test.getString(i)));
            assertTrue(m.equals(test.getString(i + 1)));
        }
    }

    @Test
    public void bip39EncodeDecodeTest() throws IOException, JSONException, ValidationException {
        JSONObject testData = readObject(TESTS);
        JSONArray english = testData.getJSONArray("english");
        for (int i = 0; i < testData.length(); ++i) {
            JSONArray test = english.getJSONArray(i);
            byte[] m = BIP39.decode(test.getString(1), "BOP");
            assertTrue(test.getString(1).equals(BIP39.encode(m, "BOP")));
        }
        SecureRandom random = new SecureRandom();
        for (int i = 0; i < 1000; ++i) {
            byte[] secret = new byte[32];
            random.nextBytes(secret);
            String e = BIP39.encode(secret, "BOP");
            assertTrue(Arrays.equals(BIP39.decode(e, "BOP"), secret));
        }
    }
}