org.wildfly.security.key.RSAParameterSpec Maven / Gradle / Ivy
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* Copyright 2016 Red Hat, Inc., and individual contributors
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* Licensed under the Apache License, Version 2.0 (the "License");
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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*/
package org.wildfly.security.key;
import java.math.BigInteger;
import java.security.interfaces.RSAKey;
import java.security.spec.AlgorithmParameterSpec;
import org.wildfly.common.Assert;
/**
* Algorithm parameter specification for RSA keys. RSA keys do not support a parameter object, but it does in fact
* have a parameter: the modulus. The methods on {@link KeyUtil} will therefore treat this class as the parameter type.
*
* @author David M. Lloyd
*/
public final class RSAParameterSpec implements AlgorithmParameterSpec {
private final BigInteger modulus;
/**
* Construct a new instance.
*
* @param modulus the modulus (must not be {@code null})
*/
public RSAParameterSpec(final BigInteger modulus) {
Assert.checkNotNullParam("modulus", modulus);
this.modulus = modulus;
}
/**
* Construct a new instance.
*
* @param rsaKey the RSA key from which the modulus should be acquired (must not be {@code null})
*/
public RSAParameterSpec(final RSAKey rsaKey) {
this(Assert.checkNotNullParam("rsaKey", rsaKey).getModulus());
}
/**
* Get the modulus.
*
* @return the modulus (not {@code null})
*/
public BigInteger getModulus() {
return modulus;
}
public boolean equals(final Object obj) {
return this == obj || obj instanceof RSAParameterSpec && modulus.equals(((RSAParameterSpec) obj).getModulus());
}
public int hashCode() {
return modulus.hashCode();
}
}