589 lines
21 KiB
Java
589 lines
21 KiB
Java
/*
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* Copyright (c) 2006, 2022 Verisign. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer. 2. Redistributions in
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* binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution. 3. The name of the author may not
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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package com.verisignlabs.dnssec.security;
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import java.math.BigInteger;
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import java.security.AlgorithmParameters;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.NoSuchAlgorithmException;
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import java.security.Provider;
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import java.security.Security;
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import java.security.Signature;
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import java.security.spec.ECFieldFp;
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import java.security.spec.ECGenParameterSpec;
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import java.security.spec.ECParameterSpec;
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import java.security.spec.ECPoint;
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import java.security.spec.EllipticCurve;
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import java.security.spec.InvalidParameterSpecException;
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import java.security.spec.NamedParameterSpec;
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import java.security.spec.RSAKeyGenParameterSpec;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Set;
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import java.util.logging.Logger;
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import org.xbill.DNS.DNSSEC;
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/**
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* This class handles translating DNS signing algorithm identifiers into various
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* usable java implementations.
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*
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* Besides centralizing the logic surrounding matching a DNSKEY algorithm
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* identifier with various crypto implementations, it also handles algorithm
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* aliasing -- that is, defining a new algorithm identifier to be equivalent to
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* an existing identifier.
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*
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* @author David Blacka
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*/
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public class DnsKeyAlgorithm {
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// Our base algorithm numbers. This is a normalization of the DNSSEC
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// algorithms (which are really signature algorithms). Thus RSASHA1,
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// RSASHA256, etc. all boil down to 'RSA' here. Similarly, ECDSAP256SHA256 and
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// ECDSAP384SHA384 both become 'ECDSA'.
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public enum BaseAlgorithm {
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UNKNOWN,
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RSA,
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DH,
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DSA,
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ECC_GOST,
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ECDSA,
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EDDSA;
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}
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private static class AlgEntry {
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public int dnssecAlgorithm;
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public String sigName;
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public BaseAlgorithm baseType;
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public AlgEntry(int algorithm, String sigName, BaseAlgorithm baseType) {
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this.dnssecAlgorithm = algorithm;
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this.sigName = sigName;
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this.baseType = baseType;
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}
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}
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private static class ECAlgEntry extends AlgEntry {
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public ECParameterSpec ecSpec;
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public ECAlgEntry(int algorithm, String sigName, BaseAlgorithm baseType, ECParameterSpec spec) {
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super(algorithm, sigName, baseType);
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this.ecSpec = spec;
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}
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}
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private static class EdAlgEntry extends AlgEntry {
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public String curveName;
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public NamedParameterSpec paramSpec;
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public EdAlgEntry(int algorithm, String sigName, BaseAlgorithm baseType, String curveName) {
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super(algorithm, sigName, baseType);
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this.curveName = curveName;
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this.paramSpec = new NamedParameterSpec(curveName);
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}
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}
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/**
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* This is a mapping of algorithm identifier to Entry. The Entry contains the
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* data needed to map the algorithm to the various crypto implementations.
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*/
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private HashMap<Integer, AlgEntry> mAlgorithmMap;
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/**
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* This is a mapping of algorithm mnemonics to algorithm identifiers.
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*/
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private HashMap<String, Integer> mMnemonicToIdMap;
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/**
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* This is a mapping of identifiers to preferred mnemonic -- the preferred one
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* is the first defined one
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*/
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private HashMap<Integer, String> mIdToMnemonicMap;
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/** This is a cached key pair generator for RSA keys. */
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private KeyPairGenerator mRSAKeyGenerator;
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/** This is a cached key pair generator for DSA keys. */
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private KeyPairGenerator mDSAKeyGenerator;
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/** This is a cached key pair generator for ECC GOST keys. */
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private KeyPairGenerator mECGOSTKeyGenerator;
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/** This is a cached key pair generator for ECDSA_P256 keys. */
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private KeyPairGenerator mECKeyGenerator;
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/** This is a cached key pair generator for EdDSA keys. */
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private KeyPairGenerator mEdKeyGenerator;
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private Logger log = Logger.getLogger(this.getClass().toString());
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/** This is the global instance for this class. */
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private static DnsKeyAlgorithm mInstance = null;
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public DnsKeyAlgorithm() {
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// Attempt to add the bouncycastle provider. This is so we can use this
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// provider if it is available, but not require the user to add it as one of
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// the java.security providers.
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try {
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Class<?> bcProviderClass = Class.forName("org.bouncycastle.jce.provider.BouncyCastleProvider");
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Provider bcProvider = (Provider) bcProviderClass.getDeclaredConstructor().newInstance();
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Security.addProvider(bcProvider);
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} catch (ReflectiveOperationException e) {
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log.fine("Unable to load BC provider");
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}
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initialize();
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}
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private void initialize() {
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mAlgorithmMap = new HashMap<>();
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mMnemonicToIdMap = new HashMap<>();
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mIdToMnemonicMap = new HashMap<>();
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// Load the standard DNSSEC algorithms.
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addAlgorithm(DNSSEC.Algorithm.RSAMD5, "MD5withRSA", BaseAlgorithm.RSA);
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addMnemonic("RSAMD5", DNSSEC.Algorithm.RSAMD5);
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addAlgorithm(DNSSEC.Algorithm.DH, "", BaseAlgorithm.DH);
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addMnemonic("DH", DNSSEC.Algorithm.DH);
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addAlgorithm(DNSSEC.Algorithm.DSA, "SHA1withDSA", BaseAlgorithm.DSA);
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addMnemonic("DSA", DNSSEC.Algorithm.DSA);
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addAlgorithm(DNSSEC.Algorithm.RSASHA1, "SHA1withRSA", BaseAlgorithm.RSA);
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addMnemonic("RSASHA1", DNSSEC.Algorithm.RSASHA1);
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addMnemonic("RSA", DNSSEC.Algorithm.RSASHA1);
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// Load the (now) standard aliases
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addAlias(DNSSEC.Algorithm.DSA_NSEC3_SHA1, "DSA-NSEC3-SHA1", DNSSEC.Algorithm.DSA);
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addAlias(DNSSEC.Algorithm.RSA_NSEC3_SHA1, "RSA-NSEC3-SHA1", DNSSEC.Algorithm.RSASHA1);
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// Also recognize the BIND 9.6 mnemonics
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addMnemonic("NSEC3DSA", DNSSEC.Algorithm.DSA_NSEC3_SHA1);
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addMnemonic("NSEC3RSASHA1", DNSSEC.Algorithm.RSA_NSEC3_SHA1);
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// Algorithms added by RFC 5702.
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addAlgorithm(DNSSEC.Algorithm.RSASHA256, "SHA256withRSA", BaseAlgorithm.RSA);
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addMnemonic("RSASHA256", DNSSEC.Algorithm.RSASHA256);
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addAlgorithm(DNSSEC.Algorithm.RSASHA512, "SHA512withRSA", BaseAlgorithm.RSA);
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addMnemonic("RSASHA512", DNSSEC.Algorithm.RSASHA512);
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// ECC-GOST is not supported by Java 1.8's Sun crypto provider. The
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// bouncycastle.org provider, however, does support it.
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// GostR3410-2001-CryptoPro-A is the named curve in the BC provider, but we
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// will get the parameters directly.
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addAlgorithm(DNSSEC.Algorithm.ECC_GOST, "GOST3411withECGOST3410", BaseAlgorithm.ECC_GOST, null);
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addMnemonic("ECCGOST", DNSSEC.Algorithm.ECC_GOST);
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addMnemonic("ECC-GOST", DNSSEC.Algorithm.ECC_GOST);
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addAlgorithm(DNSSEC.Algorithm.ECDSAP256SHA256, "SHA256withECDSA", BaseAlgorithm.ECDSA, "secp256r1");
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addMnemonic("ECDSAP256SHA256", DNSSEC.Algorithm.ECDSAP256SHA256);
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addMnemonic("ECDSA-P256", DNSSEC.Algorithm.ECDSAP256SHA256);
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addAlgorithm(DNSSEC.Algorithm.ECDSAP384SHA384, "SHA384withECDSA", BaseAlgorithm.ECDSA, "secp384r1");
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addMnemonic("ECDSAP384SHA384", DNSSEC.Algorithm.ECDSAP384SHA384);
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addMnemonic("ECDSA-P384", DNSSEC.Algorithm.ECDSAP384SHA384);
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// For the Edwards Curve implementations, we just initialize Signature and
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// KeyPairGenerator with the curve name.
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addAlgorithm(15, "Ed25519", BaseAlgorithm.EDDSA, "Ed25519");
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addMnemonic("ED25519", 15);
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addAlgorithm(16, "Ed448", BaseAlgorithm.EDDSA, "Ed448");
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addMnemonic(("ED448"), 16);
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}
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private void addAlgorithm(int algorithm, String sigName, BaseAlgorithm baseType) {
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mAlgorithmMap.put(algorithm, new AlgEntry(algorithm, sigName, baseType));
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}
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/**
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* Add a ECDSA (algorithms 13/14) to the set, looking up the curve names.
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*
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* @param algorithm the DNSSEC algorithm number.
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* @param sigName the name of the signature scheme.
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* @param curveName the official name of the elliptic curve in our crypto
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* library (SunEC).
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*/
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private void addECDSAAlgorithm(int algorithm, String sigName, String curveName) {
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ECParameterSpec ecSpec = ECSpecFromAlgorithm(algorithm);
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if (ecSpec == null)
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ecSpec = ECSpecFromName(curveName);
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if (ecSpec == null)
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return;
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// Check to see if we can get a Signature object for this algorithm.
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try {
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Signature.getInstance(sigName);
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} catch (NoSuchAlgorithmException e) {
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// for now, let's find out
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log.severe("could not get signature for " + sigName + ": " + e.getMessage());
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// If not, do not add the algorithm.
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return;
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}
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ECAlgEntry entry = new ECAlgEntry(algorithm, sigName, BaseAlgorithm.ECDSA, ecSpec);
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mAlgorithmMap.put(algorithm, entry);
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}
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/**
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* Add an EdDSA (Edwards curve algorithms, DNSSEC algorithms 15/16), looking up
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* the curve.
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*
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* @param algorithm the DNSSEC algorithm numer.
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* @param sigName the name of the signing scheme. For EdDSA, this is the same
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* as the curve.
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* @param curveName the name of the curve.
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*/
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private void addEdDSAAlgorithm(int algorithm, String sigName, String curveName) {
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// Check to see if we can get a Signature object for this algorithm.
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try {
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Signature.getInstance(sigName);
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} catch (NoSuchAlgorithmException e) {
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// for now, let's find out
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log.severe("could not get signature for EdDSA curve" + curveName + ": " + e.getMessage());
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// If not, do not add the algorithm.
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return;
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}
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EdAlgEntry entry = new EdAlgEntry(algorithm, sigName, BaseAlgorithm.EDDSA, curveName);
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mAlgorithmMap.put(algorithm, entry);
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}
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/**
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* Add an Elliptic Curve algorithm given a signing scheme and curve name.
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*
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* @param algorithm the DNSSEC algorithm number
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* @param sigName the signature scheme (e.g., which crypto hash function are
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* we using?)
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* @param baseType the base type (either ECDSA or EDDSA).
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* @param curveName the name of the curve.
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*/
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private void addAlgorithm(int algorithm, String sigName, BaseAlgorithm baseType, String curveName) {
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if (baseType == BaseAlgorithm.ECDSA) {
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addECDSAAlgorithm(algorithm, sigName, curveName);
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} else if (baseType == BaseAlgorithm.EDDSA) {
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addEdDSAAlgorithm(algorithm, sigName, curveName);
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}
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}
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/**
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* Add an alternate mnemonic for an algorithm.
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*
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* @param m the new mnemonic.
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* @param alg the DNSSEC algorithm number.
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*/
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private void addMnemonic(String m, int alg) {
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// Do not add mnemonics for algorithms that ended up not actually being
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// supported.
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if (!mAlgorithmMap.containsKey(alg))
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return;
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mMnemonicToIdMap.put(m.toUpperCase(), alg);
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mIdToMnemonicMap.computeIfAbsent(alg, k -> m);
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}
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public void addAlias(int alias, String mnemonic, int origAlgorithm) {
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if (mAlgorithmMap.containsKey(alias)) {
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log.warning("Unable to alias algorithm " + alias + " because it already exists.");
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return;
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}
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if (!mAlgorithmMap.containsKey(origAlgorithm)) {
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log.warning("Unable to alias algorithm " + alias
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+ " to unknown algorithm identifier " + origAlgorithm);
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return;
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}
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mAlgorithmMap.put(alias, mAlgorithmMap.get(origAlgorithm));
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if (mnemonic != null) {
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addMnemonic(mnemonic, alias);
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}
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}
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private AlgEntry getEntry(int alg) {
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return mAlgorithmMap.get(alg);
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}
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// For curves where we don't (or can't) get the parameters from a standard
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// name, we can construct the parameters here. For now, we only do this for
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// the ECC-GOST curve.
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private ECParameterSpec ECSpecFromAlgorithm(int algorithm) {
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if (algorithm == DNSSEC.Algorithm.ECC_GOST) {
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// From RFC 4357 Section 11.4
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BigInteger p = new BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFD97", 16);
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BigInteger a = new BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFD94", 16);
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BigInteger b = new BigInteger("A6", 16);
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BigInteger gx = new BigInteger("1", 16);
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BigInteger gy = new BigInteger("8D91E471E0989CDA27DF505A453F2B7635294F2DDF23E3B122ACC99C9E9F1E14", 16);
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BigInteger n = new BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF6C611070995AD10045841B09B761B893", 16);
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EllipticCurve curve = new EllipticCurve(new ECFieldFp(p), a, b);
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return new ECParameterSpec(curve, new ECPoint(gx, gy), n, 1);
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}
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return null;
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}
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// Fetch the curve parameters from a named ECDSA curve.
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private ECParameterSpec ECSpecFromName(String stdName) {
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try {
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AlgorithmParameters ap = AlgorithmParameters.getInstance("EC");
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ECGenParameterSpec ecgSpec = new ECGenParameterSpec(stdName);
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ap.init(ecgSpec);
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return ap.getParameterSpec(ECParameterSpec.class);
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} catch (NoSuchAlgorithmException e) {
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log.info("Elliptic Curve not supported by any crypto provider: " + e.getMessage());
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} catch (InvalidParameterSpecException e) {
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log.info("Elliptic Curve " + stdName + " not supported");
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}
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return null;
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}
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public String[] supportedAlgMnemonics() {
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Set<Integer> keyset = mAlgorithmMap.keySet();
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Integer[] algs = keyset.toArray(new Integer[keyset.size()]);
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Arrays.sort(algs);
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String[] result = new String[algs.length];
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for (int i = 0; i < algs.length; i++) {
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result[i] = mIdToMnemonicMap.get(algs[i]);
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}
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return result;
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}
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/**
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* Return a Signature object for the specified DNSSEC algorithm.
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*
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* @param algorithm The DNSSEC algorithm (by number).
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* @return a Signature object.
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*/
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public Signature getSignature(int algorithm) {
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AlgEntry entry = getEntry(algorithm);
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if (entry == null)
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return null;
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Signature s = null;
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try {
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s = Signature.getInstance(entry.sigName);
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} catch (NoSuchAlgorithmException e) {
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log.severe("Unable to get signature implementation for algorithm " + algorithm
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+ ": " + e);
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}
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return s;
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}
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/**
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* Given one of the ECDSA algorithms (ECDSAP256SHA256, etc.) return the
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* elliptic curve parameters.
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*
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* @param algorithm The DNSSEC algorithm number.
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* @return The calculated JCA ECParameterSpec for that DNSSEC algorithm, or
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* null if not a recognized/supported EC algorithm.
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*/
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public ECParameterSpec getEllipticCurveParams(int algorithm) {
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AlgEntry entry = getEntry(algorithm);
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if (entry == null)
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return null;
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if (!(entry instanceof ECAlgEntry))
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return null;
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ECAlgEntry ecEntry = (ECAlgEntry) entry;
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return ecEntry.ecSpec;
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}
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/**
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* Given one of the EdDSA algorithms (ED25519 or ED448), return the named
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* parameter spec.
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*
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* @param algorithm The DNSSEC algorithm number.
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* @return The NamedParameterSpec for that DNSSEC algorithm, nor null if the
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* algorithm wasn't a supported EdDSA algorithm.
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*/
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public NamedParameterSpec getEdwardsCurveSpec(int algorithm) {
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AlgEntry entry = getEntry(algorithm);
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if (entry == null)
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return null;
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if (!(entry instanceof EdAlgEntry))
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return null;
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EdAlgEntry edEntry = (EdAlgEntry) entry;
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return edEntry.paramSpec;
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}
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/**
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* Translate a possible algorithm alias back to the original DNSSEC algorithm
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* number
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*
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* @param algorithm a DNSSEC algorithm that may be an alias.
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* @return -1 if the algorithm isn't recognised, the orignal algorithm number
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* if it is.
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*/
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public int originalAlgorithm(int algorithm) {
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AlgEntry entry = getEntry(algorithm);
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if (entry == null)
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return -1;
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return entry.dnssecAlgorithm;
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}
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/**
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* Test if a given algorithm is supported.
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*
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* @param algorithm The DNSSEC algorithm number.
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* @return true if the algorithm is a recognized and supported algorithm or
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* alias.
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*/
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public boolean supportedAlgorithm(int algorithm) {
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return mAlgorithmMap.containsKey(algorithm);
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}
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/**
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* Given an algorithm mnemonic, convert the mnemonic to a DNSSEC algorithm
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* number.
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*
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* @param s The mnemonic string. This is case-insensitive.
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* @return -1 if the mnemonic isn't recognized or supported, the algorithm
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* number if it is.
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*/
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public int stringToAlgorithm(String s) {
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Integer alg = mMnemonicToIdMap.get(s.toUpperCase());
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if (alg != null)
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return alg.intValue();
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return -1;
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}
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/**
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* Given a DNSSEC algorithm number, return the "preferred" mnemonic.
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*
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* @param algorithm A DNSSEC algorithm number.
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* @return The preferred mnemonic string, or null if not supported or
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* recognized.
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*/
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public String algToString(int algorithm) {
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return mIdToMnemonicMap.get(algorithm);
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}
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public BaseAlgorithm baseType(int algorithm) {
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AlgEntry entry = getEntry(algorithm);
|
|
if (entry != null)
|
|
return entry.baseType;
|
|
return BaseAlgorithm.UNKNOWN;
|
|
}
|
|
|
|
public boolean isDSA(int algorithm) {
|
|
return (baseType(algorithm) == BaseAlgorithm.DSA);
|
|
}
|
|
|
|
public KeyPair generateKeyPair(int algorithm, int keysize, boolean useLargeExp)
|
|
throws NoSuchAlgorithmException {
|
|
KeyPair pair = null;
|
|
switch (baseType(algorithm)) {
|
|
case RSA: {
|
|
if (mRSAKeyGenerator == null) {
|
|
mRSAKeyGenerator = KeyPairGenerator.getInstance("RSA");
|
|
}
|
|
|
|
RSAKeyGenParameterSpec rsaSpec;
|
|
if (useLargeExp) {
|
|
rsaSpec = new RSAKeyGenParameterSpec(keysize, RSAKeyGenParameterSpec.F4);
|
|
} else {
|
|
rsaSpec = new RSAKeyGenParameterSpec(keysize, RSAKeyGenParameterSpec.F0);
|
|
}
|
|
try {
|
|
mRSAKeyGenerator.initialize(rsaSpec);
|
|
} catch (InvalidAlgorithmParameterException e) {
|
|
// Fold the InvalidAlgorithmParameterException into our existing
|
|
// thrown exception. Ugly, but requires less code change.
|
|
throw new NoSuchAlgorithmException("invalid key parameter spec");
|
|
}
|
|
|
|
pair = mRSAKeyGenerator.generateKeyPair();
|
|
break;
|
|
}
|
|
case DSA: {
|
|
if (mDSAKeyGenerator == null) {
|
|
mDSAKeyGenerator = KeyPairGenerator.getInstance("DSA");
|
|
}
|
|
mDSAKeyGenerator.initialize(keysize);
|
|
pair = mDSAKeyGenerator.generateKeyPair();
|
|
break;
|
|
}
|
|
case ECC_GOST: {
|
|
if (mECGOSTKeyGenerator == null) {
|
|
mECGOSTKeyGenerator = KeyPairGenerator.getInstance("ECGOST3410");
|
|
}
|
|
|
|
ECParameterSpec ecSpec = getEllipticCurveParams(algorithm);
|
|
try {
|
|
mECGOSTKeyGenerator.initialize(ecSpec);
|
|
} catch (InvalidAlgorithmParameterException e) {
|
|
// Fold the InvalidAlgorithmParameterException into our existing
|
|
// thrown exception. Ugly, but requires less code change.
|
|
throw new NoSuchAlgorithmException("invalid key parameter spec");
|
|
}
|
|
pair = mECGOSTKeyGenerator.generateKeyPair();
|
|
break;
|
|
}
|
|
case ECDSA: {
|
|
if (mECKeyGenerator == null) {
|
|
mECKeyGenerator = KeyPairGenerator.getInstance("EC");
|
|
}
|
|
|
|
ECParameterSpec ecSpec = getEllipticCurveParams(algorithm);
|
|
try {
|
|
mECKeyGenerator.initialize(ecSpec);
|
|
} catch (InvalidAlgorithmParameterException e) {
|
|
// Fold the InvalidAlgorithmParameterException into our existing
|
|
// thrown exception. Ugly, but requires less code change.
|
|
throw new NoSuchAlgorithmException("invalid key parameter spec");
|
|
}
|
|
pair = mECKeyGenerator.generateKeyPair();
|
|
break;
|
|
}
|
|
case EDDSA: {
|
|
EdAlgEntry entry = (EdAlgEntry) getEntry(algorithm);
|
|
mEdKeyGenerator = KeyPairGenerator.getInstance(entry.curveName);
|
|
|
|
pair = mEdKeyGenerator.generateKeyPair();
|
|
break;
|
|
}
|
|
default:
|
|
throw new NoSuchAlgorithmException("Alg " + algorithm);
|
|
}
|
|
|
|
return pair;
|
|
}
|
|
|
|
public KeyPair generateKeyPair(int algorithm, int keysize)
|
|
throws NoSuchAlgorithmException {
|
|
return generateKeyPair(algorithm, keysize, false);
|
|
}
|
|
|
|
public static DnsKeyAlgorithm getInstance() {
|
|
if (mInstance == null)
|
|
mInstance = new DnsKeyAlgorithm();
|
|
return mInstance;
|
|
}
|
|
}
|