Examples with X9ECParameters org.gudy.bouncycastle.asn1.x9.X9ECParameters used on opensource projects

Example 26 with X9ECParameters

use of org.gudy.bouncycastle.asn1.x9.X9ECParameters in project robovm by robovm.

the class JCEECPublicKey method getEncoded.

public byte[] getEncoded() {
    ASN1Encodable params;
    SubjectPublicKeyInfo info;
    // BEGIN android-removed
    // if (algorithm.equals("ECGOST3410"))
    // {
    //     if (gostParams != null)
    //     {
    //         params = gostParams;
    //     }
    //     else
    //     {
    //         if (ecSpec instanceof ECNamedCurveSpec)
    //         {
    //             params = new GOST3410PublicKeyAlgParameters(
    //                            ECGOST3410NamedCurves.getOID(((ECNamedCurveSpec)ecSpec).getName()),
    //                            CryptoProObjectIdentifiers.gostR3411_94_CryptoProParamSet);
    //         }
    //         else
    //         {   // strictly speaking this may not be applicable...
    //             ECCurve curve = EC5Util.convertCurve(ecSpec.getCurve());
    //
    //             X9ECParameters ecP = new X9ECParameters(
    //                 curve,
    //                 EC5Util.convertPoint(curve, ecSpec.getGenerator(), withCompression),
    //                 ecSpec.getOrder(),
    //                 BigInteger.valueOf(ecSpec.getCofactor()),
    //                 ecSpec.getCurve().getSeed());
    //
    //             params = new X962Parameters(ecP);
    //         }
    //     }
    //
    //     BigInteger      bX = this.q.getX().toBigInteger();
    //     BigInteger      bY = this.q.getY().toBigInteger();
    //     byte[]          encKey = new byte[64];
    //
    //     extractBytes(encKey, 0, bX);
    //     extractBytes(encKey, 32, bY);
    //
    //     try
    //     {
    //         info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_2001, params), new DEROctetString(encKey));
    //     }
    //     catch (IOException e)
    //     {
    //         return null;
    //     }
    // }
    // else
    // END android-removed
    {
        if (ecSpec instanceof ECNamedCurveSpec) {
            ASN1ObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveSpec) ecSpec).getName());
            if (curveOid == null) {
                curveOid = new ASN1ObjectIdentifier(((ECNamedCurveSpec) ecSpec).getName());
            }
            params = new X962Parameters(curveOid);
        } else if (ecSpec == null) {
            params = new X962Parameters(DERNull.INSTANCE);
        } else {
            ECCurve curve = EC5Util.convertCurve(ecSpec.getCurve());
            X9ECParameters ecP = new X9ECParameters(curve, EC5Util.convertPoint(curve, ecSpec.getGenerator(), withCompression), ecSpec.getOrder(), BigInteger.valueOf(ecSpec.getCofactor()), ecSpec.getCurve().getSeed());
            params = new X962Parameters(ecP);
        }
        ECCurve curve = this.engineGetQ().getCurve();
        ASN1OctetString p = (ASN1OctetString) new X9ECPoint(curve.createPoint(this.getQ().getX().toBigInteger(), this.getQ().getY().toBigInteger(), withCompression)).toASN1Primitive();
        info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params), p.getOctets());
    }
    return KeyUtil.getEncodedSubjectPublicKeyInfo(info);
}

Example 27 with X9ECParameters

use of org.gudy.bouncycastle.asn1.x9.X9ECParameters in project oxAuth by GluuFederation.

the class SHA256withECDSASignatureVerification method decodePublicKey.

@Override
public PublicKey decodePublicKey(byte[] encodedPublicKey) throws SignatureException {
    X9ECParameters curve = SECNamedCurves.getByName("secp256r1");
    ECPoint point = curve.getCurve().decodePoint(encodedPublicKey);
    try {
        return KeyFactory.getInstance("ECDSA").generatePublic(new ECPublicKeySpec(point, new ECParameterSpec(curve.getCurve(), curve.getG(), curve.getN(), curve.getH())));
    } catch (GeneralSecurityException ex) {
        throw new SignatureException(ex);
    }
}

Example 28 with X9ECParameters

use of org.gudy.bouncycastle.asn1.x9.X9ECParameters in project OsmAnd-tools by osmandapp.

the class SigningUtils method derivePublicKey.

/**
 * Step (8) to (11): Derive pubkey from passphrase
 * @param privBytes
 * @return
 * @throws BlockIOException
 */
static byte[] derivePublicKey(byte[] privBytes) throws BlockIOException {
    X9ECParameters params = SECNamedCurves.getByName("secp256k1");
    ECDomainParameters ecParams = new ECDomainParameters(params.getCurve(), params.getG(), params.getN(), params.getH());
    BigInteger priv = new BigInteger(1, privBytes);
    byte[] pubBytes = ecParams.getG().multiply(priv).getEncoded(true);
    return pubBytes;
}

Example 29 with X9ECParameters

use of org.gudy.bouncycastle.asn1.x9.X9ECParameters in project OsmAnd-tools by osmandapp.

the class SigningUtils method signData.

static String signData(String input, byte[] key) throws BlockIOException {
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    X9ECParameters params = SECNamedCurves.getByName("secp256k1");
    ECDomainParameters ecParams = new ECDomainParameters(params.getCurve(), params.getG(), params.getN(), params.getH());
    BigInteger priv = new BigInteger(1, key);
    ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(priv, ecParams);
    signer.init(true, privKey);
    BigInteger[] sigs = signer.generateSignature(fromHex(input));
    BigInteger r = sigs[0];
    BigInteger s = sigs[1];
    // BIP62: "S must be less than or equal to half of the Group Order N"
    BigInteger overTwo = params.getN().shiftRight(1);
    if (s.compareTo(overTwo) == 1) {
        s = params.getN().subtract(s);
    }
    try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        DERSequenceGenerator seq = new DERSequenceGenerator(bos);
        seq.addObject(new ASN1Integer(r));
        seq.addObject(new ASN1Integer(s));
        seq.close();
        return toHex(bos.toByteArray());
    } catch (IOException e) {
        // Cannot happen.
        throw new BlockIOException("That should never happen... File an issue report.");
    }
}

Example 30 with X9ECParameters

use of org.gudy.bouncycastle.asn1.x9.X9ECParameters in project xipki by xipki.

the class IaikP11Slot method generateECKeypair0.

@Override
protected P11Identity generateECKeypair0(ASN1ObjectIdentifier curveId, String label, P11NewKeyControl control) throws P11TokenException {
    long mech = PKCS11Constants.CKM_EC_KEY_PAIR_GEN;
    assertMechanismSupported(mech);
    ECPrivateKey privateKey = new ECPrivateKey();
    ECPublicKey publicKey = new ECPublicKey();
    setKeyAttributes(label, PKCS11Constants.CKK_EC, control, publicKey, privateKey);
    byte[] encodedCurveId;
    try {
        encodedCurveId = curveId.getEncoded();
    } catch (IOException ex) {
        throw new P11TokenException(ex.getMessage(), ex);
    }
    try {
        publicKey.getEcdsaParams().setByteArrayValue(encodedCurveId);
        return generateKeyPair(mech, privateKey, publicKey);
    } catch (P11TokenException ex) {
        X9ECParameters ecParams = ECNamedCurveTable.getByOID(curveId);
        if (ecParams == null) {
            throw new IllegalArgumentException("could not get X9ECParameters for curve " + curveId.getId());
        }
        try {
            publicKey.getEcdsaParams().setByteArrayValue(ecParams.getEncoded());
        } catch (IOException ex2) {
            throw new P11TokenException(ex.getMessage(), ex);
        }
        return generateKeyPair(mech, privateKey, publicKey);
    }
}