| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.provider; |
| |
| import java.security.SecureRandomParameters; |
| import java.security.SecureRandomSpi; |
| |
| /** |
| * Read ../../../../SpecTest.java for details. |
| */ |
| public class S extends SecureRandomSpi { |
| |
| protected AbstractDrbg impl; |
| |
| // This is not a DRBG. |
| public static class S1 extends SecureRandomSpi { |
| @Override |
| protected void engineSetSeed(byte[] seed) { |
| } |
| |
| @Override |
| protected void engineNextBytes(byte[] bytes) { |
| } |
| |
| @Override |
| protected byte[] engineGenerateSeed(int numBytes) { |
| return new byte[numBytes]; |
| } |
| } |
| |
| // This is a weak DRBG. maximum strength is 128 and does |
| // not support prediction resistance or reseed. |
| public static class S2 extends S { |
| public S2(SecureRandomParameters params) { |
| impl = new Impl2(params); |
| } |
| } |
| |
| // This is a strong DRBG. |
| public static class S3 extends S { |
| public S3(SecureRandomParameters params) { |
| impl = new Impl3(params); |
| } |
| } |
| |
| // AbstractDrbg Implementations |
| |
| static class Impl3 extends AbstractDrbg { |
| |
| public Impl3(SecureRandomParameters params) { |
| supportPredictionResistance = true; |
| supportReseeding = true; |
| highestSupportedSecurityStrength = 192; |
| mechName = "S3"; |
| algorithm = "SQUEEZE"; |
| configure(params); |
| } |
| |
| protected void chooseAlgorithmAndStrength() { |
| if (requestedInstantiationSecurityStrength < 0) { |
| securityStrength = DEFAULT_STRENGTH; |
| } else { |
| securityStrength = requestedInstantiationSecurityStrength; |
| } |
| minLength = securityStrength / 8; |
| maxAdditionalInputLength = maxPersonalizationStringLength = 100; |
| } |
| |
| @Override |
| protected void initEngine() { |
| } |
| |
| @Override |
| protected void instantiateAlgorithm(byte[] ei) { |
| } |
| |
| @Override |
| protected void generateAlgorithm(byte[] result, byte[] additionalInput) { |
| } |
| |
| @Override |
| protected void reseedAlgorithm(byte[] ei, byte[] additionalInput) { |
| } |
| } |
| |
| static class Impl2 extends Impl3 { |
| public Impl2(SecureRandomParameters params) { |
| super(null); |
| mechName = "S2"; |
| highestSupportedSecurityStrength = 128; |
| supportPredictionResistance = false; |
| supportReseeding = false; |
| configure(params); |
| } |
| } |
| |
| // Overridden SecureRandomSpi methods |
| |
| @Override |
| protected void engineSetSeed(byte[] seed) { |
| impl.engineSetSeed(seed); |
| } |
| |
| @Override |
| protected void engineNextBytes(byte[] bytes) { |
| impl.engineNextBytes(bytes); |
| } |
| |
| @Override |
| protected byte[] engineGenerateSeed(int numBytes) { |
| return impl.engineGenerateSeed(numBytes); |
| } |
| |
| @Override |
| protected void engineNextBytes( |
| byte[] bytes, SecureRandomParameters params) { |
| impl.engineNextBytes(bytes, params); |
| } |
| |
| @Override |
| protected void engineReseed(SecureRandomParameters params) { |
| impl.engineReseed(params); |
| } |
| |
| @Override |
| protected SecureRandomParameters engineGetParameters() { |
| return impl.engineGetParameters(); |
| } |
| |
| @Override |
| public String toString() { |
| return impl.toString(); |
| } |
| } |