Example usage for java.security.spec ECFieldFp ECFieldFp

Introduction

In this page you can find the example usage for java.security.spec ECFieldFp ECFieldFp.

Prototype

public ECFieldFp(BigInteger p) 

Source Link

Document

Creates an elliptic curve prime finite field with the specified prime p .

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("ECDH", "BC");
    EllipticCurve curve = new EllipticCurve(
            new ECFieldFp(new BigInteger("fffffffffffffffffffffffffffffffeffffffffffffffff", 16)),
            new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16),
            new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16));

    ECParameterSpec ecSpec = new ECParameterSpec(curve,
            new ECPoint(new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16),
                    new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16)),
            new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), 1);

    keyGen.initialize(ecSpec, new SecureRandom());

    KeyAgreement aKeyAgree = KeyAgreement.getInstance("ECDH", "BC");
    KeyPair aPair = keyGen.generateKeyPair();
    KeyAgreement bKeyAgree = KeyAgreement.getInstance("ECDH", "BC");
    KeyPair bPair = keyGen.generateKeyPair();

    aKeyAgree.init(aPair.getPrivate());//from w w w .  ja  v a 2s . c o  m
    bKeyAgree.init(bPair.getPrivate());

    aKeyAgree.doPhase(bPair.getPublic(), true);
    bKeyAgree.doPhase(aPair.getPublic(), true);

    MessageDigest hash = MessageDigest.getInstance("SHA1", "BC");

    System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));
    System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));
}

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From source file:MainClass.java

public static void main(String[] args) throws Exception {
    // Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("ECDH", "BC");
    EllipticCurve curve = new EllipticCurve(
            new ECFieldFp(new BigInteger("fffffffffffffffffffffffffffffffeffffffffffffffff", 16)),
            new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16),
            new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16));

    ECParameterSpec ecSpec = new ECParameterSpec(curve,
            new ECPoint(new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16),
                    new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16)),
            new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), 1);

    keyGen.initialize(ecSpec, new SecureRandom());

    KeyAgreement aKeyAgree = KeyAgreement.getInstance("ECDH", "BC");
    KeyPair aPair = keyGen.generateKeyPair();
    KeyAgreement bKeyAgree = KeyAgreement.getInstance("ECDH", "BC");
    KeyPair bPair = keyGen.generateKeyPair();

    aKeyAgree.init(aPair.getPrivate());/*from w w w  . j a  va  2  s  . c om*/
    bKeyAgree.init(bPair.getPrivate());

    aKeyAgree.doPhase(bPair.getPublic(), true);
    bKeyAgree.doPhase(aPair.getPublic(), true);

    MessageDigest hash = MessageDigest.getInstance("SHA1", "BC");

    System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));
    System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));
}

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