Examples with ECPoint java.security.spec.ECPoint used on opensource projects

Example 16 with ECPoint

use of java.security.spec.ECPoint in project XobotOS by xamarin.

the class JCEECPublicKey method populateFromPubKeyInfo.

private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) {
    // BEGIN android-removed
    // if (info.getAlgorithmId().getObjectId().equals(CryptoProObjectIdentifiers.gostR3410_2001))
    // {
    //     DERBitString bits = info.getPublicKeyData();
    //     ASN1OctetString key;
    //     this.algorithm = "ECGOST3410";
    //
    //     try
    //     {
    //         key = (ASN1OctetString) ASN1Object.fromByteArray(bits.getBytes());
    //     }
    //     catch (IOException ex)
    //     {
    //         throw new IllegalArgumentException("error recovering public key");
    //     }
    //
    //     byte[]          keyEnc = key.getOctets();
    //     byte[]          x = new byte[32];
    //     byte[]          y = new byte[32];
    //
    //     for (int i = 0; i != x.length; i++)
    //     {
    //         x[i] = keyEnc[32 - 1 - i];
    //     }
    //
    //     for (int i = 0; i != y.length; i++)
    //     {
    //         y[i] = keyEnc[64 - 1 - i];
    //     }
    //
    //     gostParams = new GOST3410PublicKeyAlgParameters((ASN1Sequence)info.getAlgorithmId().getParameters());
    //
    //     ECNamedCurveParameterSpec spec = ECGOST3410NamedCurveTable.getParameterSpec(ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()));
    //
    //     ECCurve curve = spec.getCurve();
    //     EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getSeed());
    //
    //     this.q = curve.createPoint(new BigInteger(1, x), new BigInteger(1, y), false);
    //
    //     ecSpec = new ECNamedCurveSpec(
    //             ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()),
    //             ellipticCurve,
    //             new ECPoint(
    //                     spec.getG().getX().toBigInteger(),
    //                     spec.getG().getY().toBigInteger()),
    //                     spec.getN(), spec.getH());
    //
    // }
    // else
    // END android-removed
    {
        X962Parameters params = new X962Parameters((DERObject) info.getAlgorithmId().getParameters());
        ECCurve curve;
        EllipticCurve ellipticCurve;
        if (params.isNamedCurve()) {
            DERObjectIdentifier oid = (DERObjectIdentifier) params.getParameters();
            X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid);
            curve = ecP.getCurve();
            ellipticCurve = EC5Util.convertCurve(curve, ecP.getSeed());
            ecSpec = new ECNamedCurveSpec(ECUtil.getCurveName(oid), ellipticCurve, new ECPoint(ecP.getG().getX().toBigInteger(), ecP.getG().getY().toBigInteger()), ecP.getN(), ecP.getH());
        } else if (params.isImplicitlyCA()) {
            ecSpec = null;
            curve = ProviderUtil.getEcImplicitlyCa().getCurve();
        } else {
            X9ECParameters ecP = new X9ECParameters((ASN1Sequence) params.getParameters());
            curve = ecP.getCurve();
            ellipticCurve = EC5Util.convertCurve(curve, ecP.getSeed());
            this.ecSpec = new ECParameterSpec(ellipticCurve, new ECPoint(ecP.getG().getX().toBigInteger(), ecP.getG().getY().toBigInteger()), ecP.getN(), ecP.getH().intValue());
        }
        DERBitString bits = info.getPublicKeyData();
        byte[] data = bits.getBytes();
        ASN1OctetString key = new DEROctetString(data);
        //
        if (data[0] == 0x04 && data[1] == data.length - 2 && (data[2] == 0x02 || data[2] == 0x03)) {
            int qLength = new X9IntegerConverter().getByteLength(curve);
            if (qLength >= data.length - 3) {
                try {
                    key = (ASN1OctetString) ASN1Object.fromByteArray(data);
                } catch (IOException ex) {
                    throw new IllegalArgumentException("error recovering public key");
                }
            }
        }
        X9ECPoint derQ = new X9ECPoint(curve, key);
        this.q = derQ.getPoint();
    }
}

Example 17 with ECPoint

use of java.security.spec.ECPoint in project oxAuth by GluuFederation.

the class AbstractCryptoProvider method getPublicKey.

public PublicKey getPublicKey(String alias, JSONObject jwks) throws Exception {
    java.security.PublicKey publicKey = null;
    JSONArray webKeys = jwks.getJSONArray(JSON_WEB_KEY_SET);
    for (int i = 0; i < webKeys.length(); i++) {
        JSONObject key = webKeys.getJSONObject(i);
        if (alias.equals(key.getString(KEY_ID))) {
            SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.fromString(key.getString(ALGORITHM));
            if (signatureAlgorithm != null) {
                if (signatureAlgorithm.getFamily().equals(SignatureAlgorithmFamily.RSA)) {
                    publicKey = new RSAPublicKeyImpl(new BigInteger(1, Base64Util.base64urldecode(key.getString(MODULUS))), new BigInteger(1, Base64Util.base64urldecode(key.getString(EXPONENT))));
                } else if (signatureAlgorithm.getFamily().equals(SignatureAlgorithmFamily.EC)) {
                    AlgorithmParameters parameters = AlgorithmParameters.getInstance(SignatureAlgorithmFamily.EC);
                    parameters.init(new ECGenParameterSpec(signatureAlgorithm.getCurve().getAlias()));
                    ECParameterSpec ecParameters = parameters.getParameterSpec(ECParameterSpec.class);
                    publicKey = KeyFactory.getInstance(SignatureAlgorithmFamily.EC).generatePublic(new ECPublicKeySpec(new ECPoint(new BigInteger(1, Base64Util.base64urldecode(key.getString(X))), new BigInteger(1, Base64Util.base64urldecode(key.getString(Y)))), ecParameters));
                }
            }
        }
    }
    return publicKey;
}

Example 18 with ECPoint

use of java.security.spec.ECPoint in project jdk8u_jdk by JetBrains.

the class ECKeyPairGenerator method generateKeyPair.

// generate the keypair. See JCA doc
@Override
public KeyPair generateKeyPair() {
    byte[] encodedParams = ECUtil.encodeECParameterSpec(null, (ECParameterSpec) params);
    // seed is twice the key size (in bytes) plus 1
    byte[] seed = new byte[(((keySize + 7) >> 3) + 1) * 2];
    if (random == null) {
        random = JCAUtil.getSecureRandom();
    }
    random.nextBytes(seed);
    try {
        Object[] keyBytes = generateECKeyPair(keySize, encodedParams, seed);
        // The 'params' object supplied above is equivalent to the native
        // one so there is no need to fetch it.
        // keyBytes[0] is the encoding of the native private key
        BigInteger s = new BigInteger(1, (byte[]) keyBytes[0]);
        PrivateKey privateKey = new ECPrivateKeyImpl(s, (ECParameterSpec) params);
        // keyBytes[1] is the encoding of the native public key
        ECPoint w = ECUtil.decodePoint((byte[]) keyBytes[1], ((ECParameterSpec) params).getCurve());
        PublicKey publicKey = new ECPublicKeyImpl(w, (ECParameterSpec) params);
        return new KeyPair(publicKey, privateKey);
    } catch (Exception e) {
        throw new ProviderException(e);
    }
}

Example 19 with ECPoint

use of java.security.spec.ECPoint in project j2objc by google.

the class ECPointTest method testGetAffineY01.

/**
     * Test #1 for <code>getAffineY()</code> method<br>
     * Assertion: returns affine <code>y</code> coordinate<br>
     * Test preconditions: <code>ECPoint</code> instance
     * created using valid parameters<br>
     * Expected: must return affine <code>y</code> coordinate
     * which is equal to the one passed to the constructor;
     * (both must refer the same object)
     */
public final void testGetAffineY01() {
    BigInteger y = BigInteger.valueOf(23456L);
    ECPoint p = new ECPoint(BigInteger.valueOf(-23456L), y);
    BigInteger yRet = p.getAffineY();
    assertEquals(y, yRet);
    assertSame(y, yRet);
}

Example 20 with ECPoint

use of java.security.spec.ECPoint in project j2objc by google.

the class ECPointTest method testGetAffineX01.

/**
     * Test #1 for <code>getAffineX()</code> method<br>
     * Assertion: returns affine <code>x</code> coordinate<br>
     * Test preconditions: <code>ECPoint</code> instance
     * created using valid parameters<br>
     * Expected: must return affine <code>x</code> coordinate
     * which is equal to the one passed to the constructor;
     * (both must refer the same object)
     */
public final void testGetAffineX01() {
    BigInteger x = BigInteger.valueOf(-23456L);
    ECPoint p = new ECPoint(x, BigInteger.valueOf(23456L));
    BigInteger xRet = p.getAffineX();
    assertEquals(x, xRet);
    assertSame(x, xRet);
}