/*
* Copyright 2002-2016 the original author or authors.
*
* 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 org.springframework.security.crypto.keygen;
import static org.assertj.core.api.Assertions.*;
import java.util.Arrays;
import org.junit.Test;
import org.springframework.security.crypto.codec.Hex;
public class KeyGeneratorsTests {
@Test
public void secureRandom() {
BytesKeyGenerator keyGenerator = KeyGenerators.secureRandom();
assertThat(keyGenerator.getKeyLength()).isEqualTo(8);
byte[] key = keyGenerator.generateKey();
assertThat(key.length).isEqualTo(8);
byte[] key2 = keyGenerator.generateKey();
assertThat(Arrays.equals(key, key2)).isFalse();
}
@Test
public void secureRandomCustomLength() {
BytesKeyGenerator keyGenerator = KeyGenerators.secureRandom(21);
assertThat(keyGenerator.getKeyLength()).isEqualTo(21);
byte[] key = keyGenerator.generateKey();
assertThat(key.length).isEqualTo(21);
byte[] key2 = keyGenerator.generateKey();
assertThat(Arrays.equals(key, key2)).isFalse();
}
@Test
public void shared() throws Exception {
BytesKeyGenerator keyGenerator = KeyGenerators.shared(21);
assertThat(keyGenerator.getKeyLength()).isEqualTo(21);
byte[] key = keyGenerator.generateKey();
assertThat(key.length).isEqualTo(21);
byte[] key2 = keyGenerator.generateKey();
assertThat(Arrays.equals(key, key2)).isTrue();
}
@Test
public void string() {
StringKeyGenerator keyGenerator = KeyGenerators.string();
String hexStringKey = keyGenerator.generateKey();
assertThat(hexStringKey.length()).isEqualTo(16);
assertThat(Hex.decode(hexStringKey).length).isEqualTo(8);
String hexStringKey2 = keyGenerator.generateKey();
assertThat(hexStringKey.equals(hexStringKey2)).isFalse();
}
}