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/**
* @license
* Copyright 2016 Google Inc. All rights reserved.
* 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.security.wycheproof;
import java.nio.ByteBuffer;
import java.security.Provider;
import java.security.Security;
/** Test utilities */
public class TestUtil {
public static String bytesToHex(byte[] bytes) {
// bytesToHex is used to convert output from Cipher.
// cipher.update can return null, which is equivalent to returning
// no plaitext rsp. ciphertext.
if (bytes == null) {
return "";
}
String chars = "0123456789abcdef";
StringBuilder result = new StringBuilder(2 * bytes.length);
for (byte b : bytes) {
// convert to unsigned
int val = b & 0xff;
result.append(chars.charAt(val / 16));
result.append(chars.charAt(val % 16));
}
return result.toString();
}
/**
* Returns a hexadecimal representation of the bytes written to ByteBuffer (i.e. all the bytes
* before position()).
*/
public static String byteBufferToHex(ByteBuffer buffer) {
ByteBuffer tmp = buffer.duplicate();
tmp.flip();
byte[] bytes = new byte[tmp.remaining()];
tmp.get(bytes);
return bytesToHex(bytes);
}
public static byte[] hexToBytes(String hex) throws IllegalArgumentException {
if (hex.length() % 2 != 0) {
throw new IllegalArgumentException("Expected a string of even length");
}
int size = hex.length() / 2;
byte[] result = new byte[size];
for (int i = 0; i < size; i++) {
int hi = Character.digit(hex.charAt(2 * i), 16);
int lo = Character.digit(hex.charAt(2 * i + 1), 16);
if ((hi == -1) || (lo == -1)) {
throw new IllegalArgumentException("input is not hexadecimal");
}
result[i] = (byte) (16 * hi + lo);
}
return result;
}
public static void installOnlyThisProvider(Provider provider) {
for (Provider p : Security.getProviders()) {
Security.removeProvider(p.getName());
}
Security.insertProviderAt(provider, 1);
}
public static void installOnlyOpenJDKProviders() throws Exception {
for (Provider p : Security.getProviders()) {
Security.removeProvider(p.getName());
}
installOpenJDKProvider("com.sun.net.ssl.internal.ssl.Provider");
installOpenJDKProvider("com.sun.crypto.provider.SunJCE");
installOpenJDKProvider("com.sun.security.sasl.Provider");
installOpenJDKProvider("org.jcp.xml.dsig.internal.dom.XMLDSigRI");
installOpenJDKProvider("sun.security.ec.SunEC");
installOpenJDKProvider("sun.security.jgss.SunProvider");
installOpenJDKProvider("sun.security.provider.Sun");
installOpenJDKProvider("sun.security.rsa.SunRsaSign");
installOpenJDKProvider("sun.security.smartcardio.SunPCSC");
}
private static void installOpenJDKProvider(String className) throws Exception {
Provider provider = (Provider) Class.forName(className).getConstructor().newInstance();
Security.insertProviderAt(provider, 1);
}
}
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