1/* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24package sun.security.provider; 25 26import java.security.SecureRandomParameters; 27import java.security.SecureRandomSpi; 28 29/** 30 * Read ../../../../SpecTest.java for details. 31 */ 32public class S extends SecureRandomSpi { 33 34 protected AbstractDrbg impl; 35 36 // This is not a DRBG. 37 public static class S1 extends SecureRandomSpi { 38 @Override 39 protected void engineSetSeed(byte[] seed) { 40 } 41 42 @Override 43 protected void engineNextBytes(byte[] bytes) { 44 } 45 46 @Override 47 protected byte[] engineGenerateSeed(int numBytes) { 48 return new byte[numBytes]; 49 } 50 } 51 52 // This is a weak DRBG. maximum strength is 128 and does 53 // not support prediction resistance or reseed. 54 public static class S2 extends S { 55 public S2(SecureRandomParameters params) { 56 impl = new Impl2(params); 57 } 58 } 59 60 // This is a strong DRBG. 61 public static class S3 extends S { 62 public S3(SecureRandomParameters params) { 63 impl = new Impl3(params); 64 } 65 } 66 67 // AbstractDrbg Implementations 68 69 static class Impl3 extends AbstractDrbg { 70 71 public Impl3(SecureRandomParameters params) { 72 supportPredictionResistance = true; 73 supportReseeding = true; 74 highestSupportedSecurityStrength = 192; 75 mechName = "S3"; 76 algorithm = "SQUEEZE"; 77 configure(params); 78 } 79 80 protected void chooseAlgorithmAndStrength() { 81 if (requestedInstantiationSecurityStrength < 0) { 82 securityStrength = DEFAULT_STRENGTH; 83 } else { 84 securityStrength = requestedInstantiationSecurityStrength; 85 } 86 minLength = securityStrength / 8; 87 maxAdditionalInputLength = maxPersonalizationStringLength = 100; 88 } 89 90 @Override 91 protected void initEngine() { 92 } 93 94 @Override 95 protected void instantiateAlgorithm(byte[] ei) { 96 } 97 98 @Override 99 protected void generateAlgorithm(byte[] result, byte[] additionalInput) { 100 } 101 102 @Override 103 protected void reseedAlgorithm(byte[] ei, byte[] additionalInput) { 104 } 105 } 106 107 static class Impl2 extends Impl3 { 108 public Impl2(SecureRandomParameters params) { 109 super(null); 110 mechName = "S2"; 111 highestSupportedSecurityStrength = 128; 112 supportPredictionResistance = false; 113 supportReseeding = false; 114 configure(params); 115 } 116 } 117 118 // Overridden SecureRandomSpi methods 119 120 @Override 121 protected void engineSetSeed(byte[] seed) { 122 impl.engineSetSeed(seed); 123 } 124 125 @Override 126 protected void engineNextBytes(byte[] bytes) { 127 impl.engineNextBytes(bytes); 128 } 129 130 @Override 131 protected byte[] engineGenerateSeed(int numBytes) { 132 return impl.engineGenerateSeed(numBytes); 133 } 134 135 @Override 136 protected void engineNextBytes( 137 byte[] bytes, SecureRandomParameters params) { 138 impl.engineNextBytes(bytes, params); 139 } 140 141 @Override 142 protected void engineReseed(SecureRandomParameters params) { 143 impl.engineReseed(params); 144 } 145 146 @Override 147 protected SecureRandomParameters engineGetParameters() { 148 return impl.engineGetParameters(); 149 } 150 151 @Override 152 public String toString() { 153 return impl.toString(); 154 } 155} 156