| /* |
| * Copyright (c) 2018, 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 jdk.test.lib; |
| |
| import java.security.*; |
| import java.security.spec.*; |
| import java.util.*; |
| |
| /* |
| * Utility class used by various Signature related regression tests for |
| * common functions such as generating the list of to-be-tested algorithms |
| * based on key size, etc. Currently, this is mostly needed by RSA |
| * signatures. |
| */ |
| public class SigTestUtil { |
| |
| public enum SignatureType { |
| RSA("RSA"), |
| RSASSA_PSS("RSASSA-PSS") |
| ; |
| |
| private String keyAlg; |
| |
| SignatureType(String keyAlg) { |
| this.keyAlg = keyAlg; |
| } |
| @Override |
| public String toString() { |
| return keyAlg; |
| } |
| } |
| |
| // collection of all supported digest algorithms |
| // note that the entries are ordered by required key sizes |
| private static final String[] DIGEST_ALGS = { |
| "SHA-512", |
| "SHA-384", |
| "SHA-256", |
| "SHA-512/256", |
| "SHA-224", |
| "SHA-512/224", |
| "SHA-1", |
| "MD2", "MD5" // these aren't supported by RSA PSS |
| }; |
| |
| // indice for message digest algorithms lookup |
| // may need to be adjusted if new algorithms are added |
| private static final int PKCS1_5_INDEX_768 = 0; |
| private static final int PKCS1_5_INDEX_512 = 2; |
| private static final int PKCS1_5_INDEX_END = DIGEST_ALGS.length; |
| private static final int PSS_INDEX_2048 = 0; |
| private static final int PSS_INDEX_1024 = 1; |
| private static final int PSS_INDEX_768 = 2; |
| private static final int PSS_INDEX_512 = 4; |
| private static final int PSS_INDEX_END = 7; |
| |
| public static Iterable<String> getDigestAlgorithms(SignatureType type, |
| int keysize) throws RuntimeException { |
| |
| // initialize to all, then trim based on key size |
| List<String> result = new ArrayList<>(Arrays.asList(DIGEST_ALGS)); |
| int index = 0; |
| switch (type) { |
| case RSA: |
| if (keysize >= 768) { |
| index = PKCS1_5_INDEX_768; |
| } else if (keysize >= 512) { |
| index = PKCS1_5_INDEX_512; |
| } else { |
| throw new RuntimeException("Keysize too small: " + keysize); |
| } |
| result = result.subList(index, PKCS1_5_INDEX_END); |
| break; |
| case RSASSA_PSS: |
| if (keysize >= 2048) { |
| index = PSS_INDEX_2048; |
| } else if (keysize >= 1024) { |
| index = PSS_INDEX_1024; |
| } else if (keysize >= 768) { |
| index = PSS_INDEX_768; |
| } else if (keysize >= 512) { |
| index = PSS_INDEX_512; |
| } else { |
| throw new RuntimeException("Keysize too small: " + keysize); |
| } |
| result = result.subList(index, PSS_INDEX_END); |
| break; |
| default: |
| // XXX maybe just return result instead of error out? |
| throw new RuntimeException("Unsupported signature type: " + type); |
| } |
| return result; |
| } |
| |
| public static AlgorithmParameterSpec generateDefaultParameter( |
| SignatureType type, String mdAlg) throws RuntimeException { |
| // only RSASSA-PSS signature uses parameters |
| switch (type) { |
| case RSASSA_PSS: |
| try { |
| MessageDigest md = MessageDigest.getInstance(mdAlg); |
| return new PSSParameterSpec(mdAlg, "MGF1", |
| new MGF1ParameterSpec(mdAlg), md.getDigestLength(), |
| PSSParameterSpec.TRAILER_FIELD_BC); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| default: |
| return null; |
| } |
| } |
| |
| public static String generateSigAlg(SignatureType type, |
| String mdAlg) throws RuntimeException { |
| switch (type) { |
| case RSA: |
| int idx = mdAlg.indexOf("-"); |
| if (idx != -1) { |
| mdAlg = mdAlg.substring(0, idx) + mdAlg.substring(idx+1); |
| } |
| return mdAlg + "with" + type.toString(); |
| case RSASSA_PSS: |
| return type.toString(); |
| default: |
| throw new RuntimeException("Unsupported signature type " + type ); |
| } |
| } |
| |
| } |