package net.i2p.crypto;
/*
* Copyright (c) 2003, TheCrypto
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the TheCrypto may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
import java.lang.reflect.Constructor;
import java.math.BigInteger;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.DSAParameterSpec;
import net.i2p.crypto.elgamal.spec.ElGamalParameterSpec;
import net.i2p.util.NativeBigInteger;
/**
* Prime for ElGamal from http://tools.ietf.org/html/rfc3526
* Primes for DSA: Generated by TheCrypto http://article.gmane.org/gmane.comp.security.invisiblenet.iip.devel/343
*
* See also: ECConstants, RSAConstants
*
*/
public final class CryptoConstants {
public static final NativeBigInteger dsap = new NativeBigInteger(
"9c05b2aa960d9b97b8931963c9cc9e8c3026e9b8ed92fad0a69cc886d5bf8015fcadae31"
+ "a0ad18fab3f01b00a358de237655c4964afaa2b337e96ad316b9fb1cc564b5aec5b69a9f"
+ "f6c3e4548707fef8503d91dd8602e867e6d35d2235c1869ce2479c3b9d5401de04e0727f"
+ "b33d6511285d4cf29538d9e3b6051f5b22cc1c93",
16);
public static final NativeBigInteger dsaq = new NativeBigInteger("a5dfc28fef4ca1e286744cd8eed9d29d684046b7", 16);
public static final NativeBigInteger dsag = new NativeBigInteger(
"c1f4d27d40093b429e962d7223824e0bbc47e7c832a39236fc683af84889581075ff9082"
+ "ed32353d4374d7301cda1d23c431f4698599dda02451824ff369752593647cc3ddc197de"
+ "985e43d136cdcfc6bd5409cd2f450821142a5e6f8eb1c3ab5d0484b8129fcf17bce4f7f3"
+ "3321c3cb3dbb14a905e7b2b3e93be4708cbcc82",
16);
/** 2048-bit MODP Group from RFC 3526 */
public static final NativeBigInteger elgp = new NativeBigInteger("FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+ "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
+ "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
+ "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
+ "15728E5A8AACAA68FFFFFFFFFFFFFFFF", 16);
public static final NativeBigInteger elgg = new NativeBigInteger("2");
/**
* @since 0.9.9
*/
public static final DSAParameterSpec DSA_SHA1_SPEC = new DSAParameterSpec(dsap, dsaq, dsag);
/**
* @since 0.9.25
*/
public static final ElGamalParameterSpec I2P_ELGAMAL_2048_SPEC = new ElGamalParameterSpec(elgp, elgg);
/**
* This will be org.bouncycastle.jce.spec.ElgamalParameterSpec
* if BC is available, otherwise it
* will be net.i2p.crypto.ElgamalParameterSpec
*
* @since 0.9.18
*/
public static final AlgorithmParameterSpec ELGAMAL_2048_SPEC;
static {
AlgorithmParameterSpec spec;
if (ECConstants.isBCAvailable()) {
try {
Class<?> cls = Class.forName("org.bouncycastle.jce.spec.ElGamalParameterSpec");
Constructor<?> con = cls.getConstructor(BigInteger.class, BigInteger.class);
spec = (AlgorithmParameterSpec)con.newInstance(elgp, elgg);
//System.out.println("BC ElG spec loaded");
} catch (Exception e) {
//System.out.println("BC ElG spec failed");
//e.printStackTrace();
spec = I2P_ELGAMAL_2048_SPEC;
}
} else {
//System.out.println("BC not available");
spec = I2P_ELGAMAL_2048_SPEC;
}
ELGAMAL_2048_SPEC = spec;
}
}