?? cipher.java
字號:
/**
*
*/
package RSA;
import java.math.BigInteger;
/**
* @author Administrator
*
*/
public class Cipher {
public BigInteger PublicKey;
public BigInteger PrimeP;
public BigInteger PrimeQ;
public BigInteger PrimeN;
public BigInteger ThetaN;
public BigInteger SecretKey;
public Cipher(){}
public void init(BigInteger primep, BigInteger primeq, BigInteger publickey)
{
this.PublicKey = publickey;
this.PrimeP = primep;
this.PrimeQ = primeq;
SetThetaN();
SetPrimeN();
ComputeSecretKey();
}
public void SetPrimeN()
{
this.PrimeN = this.PrimeP.multiply(this.PrimeQ);
}
public void SetThetaN()
{
BigInteger thetaN = (this.PrimeP.add(new BigInteger("-1"))).multiply((this.PrimeQ.add(new BigInteger("-1"))));
this.ThetaN = thetaN;
}
public void ComputeSecretKey()
{
this.SecretKey = (this.PublicKey).modInverse(this.ThetaN);
System.out.println("\nThe SecretKey Value d ="+this.SecretKey);
}
}
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