Package org.bouncycastle.crypto.params

Examples of org.bouncycastle.crypto.params.ECPublicKeyParameters

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            byte[]          data = bits.getBytes();
            ASN1OctetString key = new DEROctetString(data);

            X9ECPoint       derQ = new X9ECPoint(dParams.getCurve(), key);
           
            return new ECPublicKeyParameters(derQ.getPoint(), dParams);
        }
        else
        {
            throw new RuntimeException("algorithm identifier in key not recognised");
        }
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            {
                throw new IllegalStateException("EC Key Pair Generator not initialised");
            }

            AsymmetricCipherKeyPair     pair = engine.generateKeyPair();
            ECPublicKeyParameters       pub = (ECPublicKeyParameters)pair.getPublic();
            ECPrivateKeyParameters      priv = (ECPrivateKeyParameters)pair.getPrivate();

            if (ecParams instanceof ECParameterSpec)
            {
                ECParameterSpec p = (ECParameterSpec)ecParams;
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            keyGen.init(new ECKeyGenerationParameters(privKey.getParameters(), this.random));
           
            tempPair = keyGen.generateKeyPair();

            //    BigInteger Vx = tempPair.getPublic().getW().getAffineX();
            ECPublicKeyParameters V = (ECPublicKeyParameters)tempPair.getPublic();        // get temp's public key
            BigInteger Vx = V.getQ().getX().toBigInteger();        // get the point's x coordinate
           
            r = Vx.add(e).mod(n);
        }
        while (r.equals(ECConstants.ZERO));
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        if (this.forSigning)
        {
            // not properly initilaized... deal with it
        }
       
        ECPublicKeyParameters pubKey = (ECPublicKeyParameters)key;
        BigInteger n = pubKey.getParameters().getN();
        int nBitLength = n.bitLength();
       
        BigInteger e = new BigInteger(1, digest);
        int eBitLength = e.bitLength();
       
        if (eBitLength > nBitLength)
        {
            throw new DataLengthException("input too large for ECNR key.");
        }
       
        // r in the range [1,n-1]
        if (r.compareTo(ECConstants.ONE) < 0 || r.compareTo(n) >= 0)
        {
            return false;
        }

        // s in the range [0,n-1]           NB: ECNR spec says 0
        if (s.compareTo(ECConstants.ZERO) < 0 || s.compareTo(n) >= 0)
        {
            return false;
        }

        // compute P = sG + rW

        ECPoint G = pubKey.getParameters().getG();
        ECPoint W = pubKey.getQ();
        // calculate P using Bouncy math
        ECPoint P = G.multiply(s).add(W.multiply(r));
       
        BigInteger x = P.getX().toBigInteger();
        BigInteger t = r.subtract(x).mod(n);
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    }

    public BigInteger calculateAgreement(
        CipherParameters pubKey)
    {
        ECPublicKeyParameters pub = (ECPublicKeyParameters)pubKey;
        ECPoint P = pub.getQ().multiply(key.getD());

        // if (p.isInfinity()) throw new RuntimeException("d*Q == infinity");

        return P.getX().toBigInteger();
    }
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    }

    public BigInteger calculateAgreement(
        CipherParameters pubKey)
    {
        ECPublicKeyParameters   pub = (ECPublicKeyParameters)pubKey;
        ECDomainParameters      params = pub.getParameters();
        ECPoint P = pub.getQ().multiply(params.getH().multiply(key.getD()));

        // if (p.isInfinity()) throw new RuntimeException("Invalid public key");

        return P.getX().toBigInteger();
    }
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                    + " expecting: " + s + System.getProperty("line.separator")
                    + " got      : " + sig[1]);
            }

            // Verify the signature
            ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
                curve.decodePoint(Hex.decode("0262b12d60690cdcf330babab6e69763b471f994dd702d16a5")), // Q
                params);

            ecdsa.init(false, pubKey);
            if ( ecdsa.verifySignature(message, sig[0], sig[1]) )
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                    + " expecting: " + s + System.getProperty("line.separator")
                    + " got      : " + sig[1]);
            }

            // Verify the signature
            ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
                curve.decodePoint(Hex.decode("025b6dc53bc61a2548ffb0f671472de6c9521a9d2d2534e65abfcbd5fe0c70")), // Q
                params);

            ecdsa.init(false, pubKey);
            if ( ecdsa.verifySignature(message, sig[0], sig[1]) )
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    }

    public BigInteger calculateAgreement(
        CipherParameters pubKey)
    {
        ECPublicKeyParameters   pub = (ECPublicKeyParameters)pubKey;
        ECDomainParameters      params = pub.getParameters();
        ECPoint P = pub.getQ().multiply(params.getH().multiply(key.getD()));

        // if ( p.isInfinity() ) throw new RuntimeException("Invalid public key");

        return P.getX().toBigInteger();
    }
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    }

    public BigInteger calculateAgreement(
        CipherParameters pubKey)
    {
        ECPublicKeyParameters pub = (ECPublicKeyParameters)pubKey;
        ECPoint P = pub.getQ().multiply(key.getD());

        // if ( p.isInfinity() ) throw new RuntimeException("d*Q == infinity");

        return P.getX().toBigInteger();
    }
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Related Classes of org.bouncycastle.crypto.params.ECPublicKeyParameters

  • com.bitsofproof.supernode.common.ECKeyPair
  • com.nimbusds.jose.crypto.ECDSAVerifier
  • org.bouncycastle.crypto.agreement.ECDHBasicAgreement
  • org.bouncycastle.crypto.agreement.ECDHCBasicAgreement
  • org.bouncycastle.crypto.generators.DSTU4145KeyPairGenerator
  • org.bouncycastle.crypto.generators.ECKeyPairGenerator
  • org.bouncycastle.crypto.parsers.ECIESPublicKeyParser
  • org.bouncycastle.crypto.signers.ECNRSigner
  • org.bouncycastle.crypto.test.ECTest$ECDSA192bitPrime
  • org.bouncycastle.crypto.test.ECTest$ECDSA239bitPrime
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