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ElGamal classes, from Bouncy Castle 1.53, for I2PProvider.

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License: BSD
Encoding/decoding/sigs: todo.
This commit is contained in:
zzz
2016-01-23 14:51:52 +00:00
parent cf3accb181
commit 592f2449d2
16 changed files with 466 additions and 66 deletions
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1
core/java/src/net/i2p/crypto/CryptoConstants.java
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@ -34,6 +34,7 @@ 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;
/**

66
core/java/src/net/i2p/crypto/ElGamalParameterSpec.java
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@ -1,66 +0,0 @@
package net.i2p.crypto;
/*
* Copyright (c) 2000 - 2013 The Legion of the Bouncy Castle Inc. (http://www.bouncycastle.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
* is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
import java.math.BigInteger;
import java.security.spec.AlgorithmParameterSpec;
/**
* Copied from org.bouncycastle.jce.spec
* This can't actually be passed to the BC provider, we would have to
* use reflection to create a "real" org.bouncycasle.jce.spec.ElGamalParameterSpec.
*
* @since 0.9.18
*/
public class ElGamalParameterSpec implements AlgorithmParameterSpec {
private final BigInteger p;
private final BigInteger g;
/**
* Constructs a parameter set for Diffie-Hellman, using a prime modulus
* <code>p</code> and a base generator <code>g</code>.
*
* @param p the prime modulus
* @param g the base generator
*/
public ElGamalParameterSpec(BigInteger p, BigInteger g) {
this.p = p;
this.g = g;
}
/**
* Returns the prime modulus <code>p</code>.
*
* @return the prime modulus <code>p</code>
*/
public BigInteger getP() {
return p;
}
/**
* Returns the base generator <code>g</code>.
*
* @return the base generator <code>g</code>
*/
public BigInteger getG() {
return g;
}
}

11
core/java/src/net/i2p/crypto/elgamal/ElGamalKey.java Normal file
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@ -0,0 +1,11 @@
package net.i2p.crypto.elgamal;
import javax.crypto.interfaces.DHKey;
import net.i2p.crypto.elgamal.spec.ElGamalParameterSpec;
public interface ElGamalKey
extends DHKey
{
public ElGamalParameterSpec getParameters();
}

11
core/java/src/net/i2p/crypto/elgamal/ElGamalPrivateKey.java Normal file
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@ -0,0 +1,11 @@
package net.i2p.crypto.elgamal;
import java.math.BigInteger;
import javax.crypto.interfaces.DHPrivateKey;
public interface ElGamalPrivateKey
extends ElGamalKey, DHPrivateKey
{
public BigInteger getX();
}

11
core/java/src/net/i2p/crypto/elgamal/ElGamalPublicKey.java Normal file
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@ -0,0 +1,11 @@
package net.i2p.crypto.elgamal;
import java.math.BigInteger;
import javax.crypto.interfaces.DHPublicKey;
public interface ElGamalPublicKey
extends ElGamalKey, DHPublicKey
{
public BigInteger getY();
}

115
core/java/src/net/i2p/crypto/elgamal/impl/ElGamalPrivateKeyImpl.java Normal file
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@ -0,0 +1,115 @@
package net.i2p.crypto.elgamal.impl;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import javax.crypto.interfaces.DHPrivateKey;
import javax.crypto.spec.DHParameterSpec;
import javax.crypto.spec.DHPrivateKeySpec;
import net.i2p.crypto.elgamal.ElGamalPrivateKey;
import net.i2p.crypto.elgamal.spec.ElGamalParameterSpec;
import net.i2p.crypto.elgamal.spec.ElGamalPrivateKeySpec;
public class ElGamalPrivateKeyImpl
implements ElGamalPrivateKey, DHPrivateKey
{
static final long serialVersionUID = 4819350091141529678L;
BigInteger x;
ElGamalParameterSpec elSpec;
protected ElGamalPrivateKeyImpl()
{
}
ElGamalPrivateKeyImpl(
ElGamalPrivateKey key)
{
this.x = key.getX();
this.elSpec = key.getParameters();
}
ElGamalPrivateKeyImpl(
DHPrivateKey key)
{
this.x = key.getX();
this.elSpec = new ElGamalParameterSpec(key.getParams().getP(), key.getParams().getG());
}
ElGamalPrivateKeyImpl(
ElGamalPrivateKeySpec spec)
{
this.x = spec.getX();
this.elSpec = new ElGamalParameterSpec(spec.getParams().getP(), spec.getParams().getG());
}
ElGamalPrivateKeyImpl(
DHPrivateKeySpec spec)
{
this.x = spec.getX();
this.elSpec = new ElGamalParameterSpec(spec.getP(), spec.getG());
}
public String getAlgorithm()
{
return "ElGamal";
}
/**
* return the encoding format we produce in getEncoded().
*
* @return the string "PKCS#8"
*/
public String getFormat()
{
return "PKCS#8";
}
/**
* Return a PKCS8 representation of the key. The sequence returned
* represents a full PrivateKeyInfo object.
*
* @return a PKCS8 representation of the key.
*/
public byte[] getEncoded()
{
return null;
}
public ElGamalParameterSpec getParameters()
{
return elSpec;
}
public DHParameterSpec getParams()
{
return new DHParameterSpec(elSpec.getP(), elSpec.getG());
}
public BigInteger getX()
{
return x;
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
x = (BigInteger)in.readObject();
this.elSpec = new ElGamalParameterSpec((BigInteger)in.readObject(), (BigInteger)in.readObject());
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.writeObject(this.getX());
out.writeObject(elSpec.getP());
out.writeObject(elSpec.getG());
}
}

106
core/java/src/net/i2p/crypto/elgamal/impl/ElGamalPublicKeyImpl.java Normal file
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@ -0,0 +1,106 @@
package net.i2p.crypto.elgamal.impl;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import javax.crypto.interfaces.DHPublicKey;
import javax.crypto.spec.DHParameterSpec;
import javax.crypto.spec.DHPublicKeySpec;
import net.i2p.crypto.elgamal.ElGamalPublicKey;
import net.i2p.crypto.elgamal.spec.ElGamalParameterSpec;
import net.i2p.crypto.elgamal.spec.ElGamalPublicKeySpec;
public class ElGamalPublicKeyImpl
implements ElGamalPublicKey, DHPublicKey
{
static final long serialVersionUID = 8712728417091216948L;
private BigInteger y;
private ElGamalParameterSpec elSpec;
ElGamalPublicKeyImpl(
ElGamalPublicKeySpec spec)
{
this.y = spec.getY();
this.elSpec = new ElGamalParameterSpec(spec.getParams().getP(), spec.getParams().getG());
}
ElGamalPublicKeyImpl(
DHPublicKeySpec spec)
{
this.y = spec.getY();
this.elSpec = new ElGamalParameterSpec(spec.getP(), spec.getG());
}
ElGamalPublicKeyImpl(
ElGamalPublicKey key)
{
this.y = key.getY();
this.elSpec = key.getParameters();
}
ElGamalPublicKeyImpl(
DHPublicKey key)
{
this.y = key.getY();
this.elSpec = new ElGamalParameterSpec(key.getParams().getP(), key.getParams().getG());
}
ElGamalPublicKeyImpl(
BigInteger y,
ElGamalParameterSpec elSpec)
{
this.y = y;
this.elSpec = elSpec;
}
public String getAlgorithm()
{
return "ElGamal";
}
public String getFormat()
{
return "X.509";
}
public byte[] getEncoded()
{
return null;
}
public ElGamalParameterSpec getParameters()
{
return elSpec;
}
public DHParameterSpec getParams()
{
return new DHParameterSpec(elSpec.getP(), elSpec.getG());
}
public BigInteger getY()
{
return y;
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
this.y = (BigInteger)in.readObject();
this.elSpec = new ElGamalParameterSpec((BigInteger)in.readObject(), (BigInteger)in.readObject());
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.writeObject(this.getY());
out.writeObject(elSpec.getP());
out.writeObject(elSpec.getG());
}
}

9
core/java/src/net/i2p/crypto/elgamal/impl/package.html Normal file
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@ -0,0 +1,9 @@
<html><body>
<p>
Implementation of ElGamal keys, used for I2PProvider.
Modified from Bouncy Castle 1.53.
See net.i2p.crypto.elgamal for license info.
</p><p>
Since 0.9.25.
</p>
</body></html>

29
core/java/src/net/i2p/crypto/elgamal/package.html Normal file
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@ -0,0 +1,29 @@
<html><body>
<p>
Interfaces for ElGamal keys, used for I2PProvider.
Copied from Bouncy Castle 1.53.
</p><p>
Since 0.9.25.
</p><p><pre>
Copyright (c) 2000 - 2013 The Legion of the Bouncy Castle Inc. (http://www.bouncycastle.org)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software
and associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
</pre></p>
</body></html>

28
core/java/src/net/i2p/crypto/elgamal/spec/ElGamalGenParameterSpec.java Normal file
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@ -0,0 +1,28 @@
package net.i2p.crypto.elgamal.spec;
import java.security.spec.AlgorithmParameterSpec;
public class ElGamalGenParameterSpec
implements AlgorithmParameterSpec
{
private int primeSize;
/*
* @param primeSize the size (in bits) of the prime modulus.
*/
public ElGamalGenParameterSpec(
int primeSize)
{
this.primeSize = primeSize;
}
/**
* Returns the size in bits of the prime modulus.
*
* @return the size in bits of the prime modulus
*/
public int getPrimeSize()
{
return primeSize;
}
}

20
core/java/src/net/i2p/crypto/elgamal/spec/ElGamalKeySpec.java Normal file
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@ -0,0 +1,20 @@
package net.i2p.crypto.elgamal.spec;
import java.security.spec.KeySpec;
public class ElGamalKeySpec
implements KeySpec
{
private ElGamalParameterSpec spec;
public ElGamalKeySpec(
ElGamalParameterSpec spec)
{
this.spec = spec;
}
public ElGamalParameterSpec getParams()
{
return spec;
}
}

46
core/java/src/net/i2p/crypto/elgamal/spec/ElGamalParameterSpec.java Normal file
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@ -0,0 +1,46 @@
package net.i2p.crypto.elgamal.spec;
import java.math.BigInteger;
import java.security.spec.AlgorithmParameterSpec;
/**
* Copied from org.bouncycastle.jce.spec
* This can't actually be passed to the BC provider, we would have to
* use reflection to create a "real" org.bouncycasle.jce.spec.ElGamalParameterSpec.
*
* @since 0.9.18
*/
public class ElGamalParameterSpec implements AlgorithmParameterSpec {
private final BigInteger p;
private final BigInteger g;
/**
* Constructs a parameter set for Diffie-Hellman, using a prime modulus
* <code>p</code> and a base generator <code>g</code>.
*
* @param p the prime modulus
* @param g the base generator
*/
public ElGamalParameterSpec(BigInteger p, BigInteger g) {
this.p = p;
this.g = g;
}
/**
* Returns the prime modulus <code>p</code>.
*
* @return the prime modulus <code>p</code>
*/
public BigInteger getP() {
return p;
}
/**
* Returns the base generator <code>g</code>.
*
* @return the base generator <code>g</code>
*/
public BigInteger getG() {
return g;
}
}

33
core/java/src/net/i2p/crypto/elgamal/spec/ElGamalPrivateKeySpec.java Normal file
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@ -0,0 +1,33 @@
package net.i2p.crypto.elgamal.spec;
import java.math.BigInteger;
/**
* This class specifies an ElGamal private key with its associated parameters.
*
* @see ElGamalPublicKeySpec
*/
public class ElGamalPrivateKeySpec
extends ElGamalKeySpec
{
private BigInteger x;
public ElGamalPrivateKeySpec(
BigInteger x,
ElGamalParameterSpec spec)
{
super(spec);
this.x = x;
}
/**
* Returns the private value <code>x</code>.
*
* @return the private value <code>x</code>
*/
public BigInteger getX()
{
return x;
}
}

33
core/java/src/net/i2p/crypto/elgamal/spec/ElGamalPublicKeySpec.java Normal file
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@ -0,0 +1,33 @@
package net.i2p.crypto.elgamal.spec;
import java.math.BigInteger;
/**
* This class specifies an ElGamal public key with its associated parameters.
*
* @see ElGamalPrivateKeySpec
*/
public class ElGamalPublicKeySpec
extends ElGamalKeySpec
{
private BigInteger y;
public ElGamalPublicKeySpec(
BigInteger y,
ElGamalParameterSpec spec)
{
super(spec);
this.y = y;
}
/**
* Returns the public value <code>y</code>.
*
* @return the public value <code>y</code>
*/
public BigInteger getY()
{
return y;
}
}

9
core/java/src/net/i2p/crypto/elgamal/spec/package.html Normal file
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@ -0,0 +1,9 @@
<html><body>
<p>
Specs ElGamal keys, used for I2PProvider.
Copied from Bouncy Castle 1.53.
See net.i2p.crypto.elgamal for license info.
</p><p>
Since 0.9.25.
</p>
</body></html>