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

Example 11 with X9ECParameters

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

the class JCEECPublicKey method getEncoded.

@Override
public byte[] getEncoded() {
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    DEROutputStream dOut = new DEROutputStream(bOut);
    X962Parameters params = null;
    if (ecSpec instanceof ECNamedCurveParameterSpec) {
        params = new X962Parameters(X962NamedCurves.getOID(((ECNamedCurveParameterSpec) ecSpec).getName()));
    } else {
        X9ECParameters ecP = new X9ECParameters(ecSpec.getCurve(), ecSpec.getG(), ecSpec.getN(), ecSpec.getH(), ecSpec.getSeed());
        params = new X962Parameters(ecP);
    }
    ASN1OctetString p = (ASN1OctetString) (new X9ECPoint(this.getQ()).getDERObject());
    SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params.getDERObject()), p.getOctets());
    try {
        dOut.writeObject(info);
        dOut.close();
    } catch (IOException e) {
        throw new RuntimeException("Error encoding EC public key");
    }
    return bOut.toByteArray();
}

Example 12 with X9ECParameters

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

the class BaseX509Certprofile method checkEcSubjectPublicKeyInfo.

private static void checkEcSubjectPublicKeyInfo(ASN1ObjectIdentifier curveOid, byte[] encoded) throws BadCertTemplateException {
    ParamUtil.requireNonNull("curveOid", curveOid);
    ParamUtil.requireNonNull("encoded", encoded);
    ParamUtil.requireMin("encoded.length", encoded.length, 1);
    Integer expectedLength = ecCurveFieldSizes.get(curveOid);
    if (expectedLength == null) {
        X9ECParameters ecP = ECUtil.getNamedCurveByOid(curveOid);
        ECCurve curve = ecP.getCurve();
        expectedLength = (curve.getFieldSize() + 7) / 8;
        ecCurveFieldSizes.put(curveOid, expectedLength);
    }
    switch(encoded[0]) {
        // compressed
        case 0x02:
        case // compressed
        0x03:
            if (encoded.length != (expectedLength + 1)) {
                throw new BadCertTemplateException("incorrect length for compressed encoding");
            }
            break;
        // uncompressed
        case 0x04:
        // hybrid
        case 0x06:
        case // hybrid
        0x07:
            if (encoded.length != (2 * expectedLength + 1)) {
                throw new BadCertTemplateException("incorrect length for uncompressed/hybrid encoding");
            }
            break;
        default:
            throw new BadCertTemplateException(String.format("invalid point encoding 0x%02x", encoded[0]));
    }
}

Example 13 with X9ECParameters

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

the class GMUtil method getSM2Z.

// CHECKSTYLE:SKIP
public static byte[] getSM2Z(byte[] userID, ASN1ObjectIdentifier curveOid, BigInteger pubPointX, BigInteger pubPointY) {
    SM3Digest digest = new SM3Digest();
    addUserId(digest, userID);
    X9ECParameters ecParams = GMNamedCurves.getByOID(curveOid);
    addFieldElement(digest, ecParams.getCurve().getA());
    addFieldElement(digest, ecParams.getCurve().getB());
    addFieldElement(digest, ecParams.getG().getAffineXCoord());
    addFieldElement(digest, ecParams.getG().getAffineYCoord());
    int fieldSize = (ecParams.getCurve().getFieldSize() + 7) / 8;
    byte[] bytes = BigIntegers.asUnsignedByteArray(fieldSize, pubPointX);
    digest.update(bytes, 0, fieldSize);
    bytes = BigIntegers.asUnsignedByteArray(fieldSize, pubPointY);
    digest.update(bytes, 0, fieldSize);
    byte[] result = new byte[digest.getDigestSize()];
    digest.doFinal(result, 0);
    return result;
}

Example 14 with X9ECParameters

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

the class PublicKeyChecker method checkECSubjectPublicKeyInfo.

// method checkPublicKey
// CHECKSTYLE:SKIP
private static void checkECSubjectPublicKeyInfo(ASN1ObjectIdentifier curveOid, byte[] encoded) throws BadCertTemplateException {
    Integer expectedLength = EC_CURVEFIELD_SIZES.get(curveOid);
    if (expectedLength == null) {
        X9ECParameters ecP = ECUtil.getNamedCurveByOid(curveOid);
        ECCurve curve = ecP.getCurve();
        expectedLength = (curve.getFieldSize() + 7) / 8;
        EC_CURVEFIELD_SIZES.put(curveOid, expectedLength);
    }
    switch(encoded[0]) {
        // compressed
        case 0x02:
        case // compressed
        0x03:
            if (encoded.length != (expectedLength + 1)) {
                throw new BadCertTemplateException("incorrect length for compressed encoding");
            }
            break;
        // uncompressed
        case 0x04:
        // hybrid
        case 0x06:
        case // hybrid
        0x07:
            if (encoded.length != (2 * expectedLength + 1)) {
                throw new BadCertTemplateException("incorrect length for uncompressed/hybrid encoding");
            }
            break;
        default:
            throw new BadCertTemplateException("invalid point encoding 0x" + Integer.toString(encoded[0], 16));
    }
// end switch
}

Example 15 with X9ECParameters

use of org.gudy.bouncycastle.asn1.x9.X9ECParameters in project incubator-pulsar by apache.

the class MessageCrypto method loadPrivateKey.

private PrivateKey loadPrivateKey(byte[] keyBytes) throws Exception {
    Reader keyReader = new StringReader(new String(keyBytes));
    PrivateKey privateKey = null;
    try (PEMParser pemReader = new PEMParser(keyReader)) {
        X9ECParameters ecParam = null;
        Object pemObj = pemReader.readObject();
        if (pemObj instanceof ASN1ObjectIdentifier) {
            // make sure this is EC Parameter we're handling. In which case
            // we'll store it and read the next object which should be our
            // EC Private Key
            ASN1ObjectIdentifier ecOID = (ASN1ObjectIdentifier) pemObj;
            ecParam = ECNamedCurveTable.getByOID(ecOID);
            if (ecParam == null) {
                throw new PEMException("Unable to find EC Parameter for the given curve oid: " + ecOID.getId());
            }
            pemObj = pemReader.readObject();
        } else if (pemObj instanceof X9ECParameters) {
            ecParam = (X9ECParameters) pemObj;
            pemObj = pemReader.readObject();
        }
        if (pemObj instanceof PEMKeyPair) {
            PrivateKeyInfo pKeyInfo = ((PEMKeyPair) pemObj).getPrivateKeyInfo();
            JcaPEMKeyConverter pemConverter = new JcaPEMKeyConverter();
            privateKey = pemConverter.getPrivateKey(pKeyInfo);
        }
        if (ecParam != null && ECDSA.equals(privateKey.getAlgorithm())) {
            ECParameterSpec ecSpec = new ECParameterSpec(ecParam.getCurve(), ecParam.getG(), ecParam.getN(), ecParam.getH(), ecParam.getSeed());
            KeyFactory keyFactory = KeyFactory.getInstance(ECDSA, BouncyCastleProvider.PROVIDER_NAME);
            ECPrivateKeySpec keySpec = new ECPrivateKeySpec(((BCECPrivateKey) privateKey).getS(), ecSpec);
            privateKey = (PrivateKey) keyFactory.generatePrivate(keySpec);
        }
    } catch (IOException e) {
        throw new Exception(e);
    }
    return privateKey;
}