Example usage for org.bouncycastle.jce.spec ECParameterSpec getN

List of usage examples for org.bouncycastle.jce.spec ECParameterSpec getN

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Introduction

In this page you can find the example usage for org.bouncycastle.jce.spec ECParameterSpec getN.

Prototype

public BigInteger getN()

Source Link

Document

return the order N of G

Usage

From source file:com.yahoo.athenz.zts.store.DataStore.java

License:Apache License

String getCurveName(org.bouncycastle.jce.spec.ECParameterSpec ecParameterSpec) {

    String curveName = null;//from   w w  w  .j a  v a2  s.  c  om
    for (Enumeration names = ECNamedCurveTable.getNames(); names.hasMoreElements();) {

        final String name = (String) names.nextElement();
        final X9ECParameters params = ECNamedCurveTable.getByName(name);

        if (params.getN().equals(ecParameterSpec.getN()) && params.getH().equals(ecParameterSpec.getH())
                && params.getCurve().equals(ecParameterSpec.getCurve())
                && params.getG().equals(ecParameterSpec.getG())) {
            curveName = name;
            break;
        }
    }
    return curveName;
}

From source file:com.yahoo.athenz.zts.store.DataStoreTest.java

License:Apache License

@Test
public void testGetInvalidCurveName() {
    ChangeLogStore clogStore = new MockZMSFileChangeLogStore("/tmp/zts_server_unit_tests/zts_root", pkey, "0");
    DataStore store = new DataStore(clogStore, null);
    ECParameterSpec spec = Mockito.mock(ECParameterSpec.class);
    Mockito.when(spec.getCurve()).thenReturn(null);
    Mockito.when(spec.getG()).thenReturn(null);
    Mockito.when(spec.getH()).thenReturn(new BigInteger("100"));
    Mockito.when(spec.getN()).thenReturn(new BigInteger("100"));
    assertNull(store.getCurveName(spec));
}

From source file:common.crypto.bouncycastle.CEcdsaSignerBC.java

License:Open Source License

@Override
public void initialize(String szCurveName, CryptoTypes.ESHAMode eShaMode) {
    ECParameterSpec paramSpec = ECNamedCurveTable.getParameterSpec(szCurveName);
    m_eccParameter = new ECDomainParameters(paramSpec.getCurve(), paramSpec.getG(), paramSpec.getN());
    m_signer = new ECDSASigner();
    m_shaHash = new CCryptoSHABC();
    m_shaHash.initialize(eShaMode);/*from  w w w.jav a2 s .  c  o m*/
}

From source file:dorkbox.util.crypto.CryptoECC.java

License:Apache License

public static AsymmetricCipherKeyPair generateKeyPair(ECParameterSpec eccSpec, SecureRandom secureRandom) {
    ECKeyGenerationParameters ecParams = new ECKeyGenerationParameters(
            new ECDomainParameters(eccSpec.getCurve(), eccSpec.getG(), eccSpec.getN()), secureRandom);

    ECKeyPairGenerator ecKeyGen = new ECKeyPairGenerator();
    ecKeyGen.init(ecParams);/*  w w w  .  j a v a2s .c  o  m*/

    return ecKeyGen.generateKeyPair();
}

From source file:eu.europa.ec.markt.dss.DSSPKUtils.java

License:Open Source License

/**
 * This method returns the public key size extracted from public key infrastructure.
 *
 * @param publicKey//from   w  w w.  j  a v  a2 s. c o  m
 * @return
 */
public static int getPublicKeySize(final PublicKey publicKey) {

    int publicKeySize = -1;
    if (publicKey instanceof RSAPublicKey) {
        RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
        publicKeySize = rsaPublicKey.getModulus().bitLength();
    } else if (publicKey instanceof JCEECPublicKey) {

        /**
         * The security of EC systems relies on the size of q, and the size of an EC key refers to the bit-length of
         * the subgroup size q.
         */
        final JCEECPublicKey jceecPublicKey = (JCEECPublicKey) publicKey;
        ECParameterSpec spec = jceecPublicKey.getParameters();
        if (spec != null) {

            publicKeySize = spec.getN().bitLength();
        } else {
            // We support the key, but we don't know the key length
            publicKeySize = 0;
            // publicKeySize = jceecPublicKey.getQ().getCurve().getFieldSize();
        }
    } else if (publicKey instanceof ECPublicKey) {

        ECPublicKey ecPublicKey = (ECPublicKey) publicKey;
        java.security.spec.ECParameterSpec spec = ecPublicKey.getParams();
        if (spec != null) {

            // TODO: (Bob: 20130528) To be checked (need an example)
            publicKeySize = spec.getCurve().getField().getFieldSize();
        } else {

            publicKeySize = 0;
        }
    } else if (publicKey instanceof DSAPublicKey) {
        DSAPublicKey dsaPublicKey = (DSAPublicKey) publicKey;
        publicKeySize = dsaPublicKey.getParams().getP().bitLength();
    } else {

        LOG.error("Unknown public key infrastructure: " + publicKey.getClass().getName());
    }
    return publicKeySize;
}

From source file:eu.europa.ec.markt.dss.validation102853.toolbox.PublicKeyUtils.java

License:Open Source License

/**
 * This method returns the public key size extracted from public key infrastructure.
 *
 * @param publicKey/*from   www  .j av a  2s.c  o  m*/
 * @return
 */
public static int getPublicKeySize(final PublicKey publicKey) {

    int publicKeySize = -1;
    if (publicKey instanceof RSAPublicKeyImpl) {

        RSAPublicKeyImpl rsaPublicKey = (RSAPublicKeyImpl) publicKey;
        publicKeySize = rsaPublicKey.getModulus().bitLength();
    } else if (publicKey instanceof JCERSAPublicKey) {

        final JCERSAPublicKey rsaPublicKey = (JCERSAPublicKey) publicKey;
        publicKeySize = rsaPublicKey.getModulus().bitLength();
    } else if (publicKey instanceof JCEECPublicKey) {

        /**
         * The security of EC systems relies on the size of q, and the size of an EC key refers to the bit-length of
         * the subgroup size q.
         */
        final JCEECPublicKey jceecPublicKey = (JCEECPublicKey) publicKey;
        ECParameterSpec spec = jceecPublicKey.getParameters();
        if (spec != null) {

            publicKeySize = spec.getN().bitLength();
        } else {
            // We support the key, but we don't know the key length
            publicKeySize = 0;
            // publicKeySize = jceecPublicKey.getQ().getCurve().getFieldSize();
        }
    } else if (publicKey instanceof ECPublicKey) {

        ECPublicKey ecPublicKey = (ECPublicKey) publicKey;
        java.security.spec.ECParameterSpec spec = ecPublicKey.getParams();
        if (spec != null) {

            // TODO: (Bob: 20130528) To be checked (need an example)
            publicKeySize = spec.getCurve().getField().getFieldSize();
        } else {

            publicKeySize = 0;
        }
    } else if (publicKey instanceof DSAPublicKeyImpl) {

        DSAPublicKeyImpl dsaPublicKeyImpl = (DSAPublicKeyImpl) publicKey;
        publicKeySize = dsaPublicKeyImpl.getParams().getP().bitLength();

    } else if (publicKey instanceof JDKDSAPublicKey) {

        JDKDSAPublicKey dsaPublicKeyImpl = (JDKDSAPublicKey) publicKey;
        publicKeySize = dsaPublicKeyImpl.getParams().getP().bitLength();
    } else {

        LOG.warning("Unknown public key infrastructure: " + publicKey.getClass().getName());
    }
    return publicKeySize;
}

From source file:eu.europa.esig.dss.DSSPKUtils.java

License:Open Source License

/**
 * This method returns the public key size extracted from public key infrastructure.
 *
 * @param publicKey//from www  . j  a v a 2  s  .  co m
 * @return
 */
public static int getPublicKeySize(final PublicKey publicKey) {

    int publicKeySize = -1;
    if (publicKey instanceof RSAPublicKey) {
        RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
        publicKeySize = rsaPublicKey.getModulus().bitLength();
    } else if (publicKey instanceof JCEECPublicKey) {

        /**
         * The security of EC systems relies on the size of q, and the size of an EC key refers to the bit-length of
         * the subgroup size q.
         */
        final JCEECPublicKey jceecPublicKey = (JCEECPublicKey) publicKey;
        ECParameterSpec spec = jceecPublicKey.getParameters();
        if (spec != null) {

            publicKeySize = spec.getN().bitLength();
        } else {
            // We support the key, but we don't know the key length
            publicKeySize = 0;
            // publicKeySize = jceecPublicKey.getQ().getCurve().getFieldSize();
        }
    } else if (publicKey instanceof ECPublicKey) {

        ECPublicKey ecPublicKey = (ECPublicKey) publicKey;
        java.security.spec.ECParameterSpec spec = ecPublicKey.getParams();
        if (spec != null) {
            publicKeySize = spec.getCurve().getField().getFieldSize();
        } else {
            publicKeySize = 0;
        }
    } else if (publicKey instanceof DSAPublicKey) {
        DSAPublicKey dsaPublicKey = (DSAPublicKey) publicKey;
        publicKeySize = dsaPublicKey.getParams().getP().bitLength();
    } else {

        LOG.error("Unknown public key infrastructure: " + publicKey.getClass().getName());
    }
    return publicKeySize;
}