Java ECGOST3410NamedCurves类代码示例

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
public static ASN1ObjectIdentifier getNamedCurveOid(
    String name)
{
    ASN1ObjectIdentifier oid = X962NamedCurves.getOID(name);
    
    if (oid == null)
    {
        oid = SECNamedCurves.getOID(name);
        if (oid == null)
        {
            oid = NISTNamedCurves.getOID(name);
        }
        if (oid == null)
        {
            oid = TeleTrusTNamedCurves.getOID(name);
        }
        if (oid == null)
        {
            oid = ECGOST3410NamedCurves.getOID(name);
        }
    }

    return oid;
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
public static String getCurveName(
    ASN1ObjectIdentifier oid)
{
    String name = X962NamedCurves.getName(oid);
    
    if (name == null)
    {
        name = SECNamedCurves.getName(oid);
        if (name == null)
        {
            name = NISTNamedCurves.getName(oid);
        }
        if (name == null)
        {
            name = TeleTrusTNamedCurves.getName(oid);
        }
        if (name == null)
        {
            name = ECGOST3410NamedCurves.getName(oid);
        }
    }

    return name;
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
/**
 * return a parameter spec representing the passed in named
 * curve. The routine returns null if the curve is not present.
 * 
 * @param name the name of the curve requested
 * @return a parameter spec for the curve, null if it is not available.
 */
public static ECNamedCurveParameterSpec getParameterSpec(
    String  name)
{
    ECDomainParameters  ecP = ECGOST3410NamedCurves.getByName(name);
    if (ecP == null)
    {
        try
        {
            ecP = ECGOST3410NamedCurves.getByOID(new ASN1ObjectIdentifier(name));
        }
        catch (IllegalArgumentException e)
        {
            return null; // not an oid.
        }
    }
    
    if (ecP == null)
    {
        return null;
    }

    return new ECNamedCurveParameterSpec(
                                    name,
                                    ecP.getCurve(),
                                    ecP.getG(),
                                    ecP.getN(),
                                    ecP.getH(),
                                    ecP.getSeed());
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
/**
 * return a X9ECParameters object representing the passed in named
 * curve.
 *
 * @param oid the object id of the curve requested
 * @return a standard name for the curve.
 */
public static String getName(
    ASN1ObjectIdentifier oid)
{
    String name = NISTNamedCurves.getName(oid);

    if (name == null)
    {
        name = SECNamedCurves.getName(oid);
    }

    if (name == null)
    {
        name = TeleTrusTNamedCurves.getName(oid);
    }

    if (name == null)
    {
        name = X962NamedCurves.getName(oid);
    }

    if (name == null)
    {
        name = ECGOST3410NamedCurves.getName(oid);
    }

    return name;
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
private static ASN1ObjectIdentifier lookupOidByName(String name)
{
    ASN1ObjectIdentifier oid = X962NamedCurves.getOID(name);

    if (oid == null)
    {
        oid = SECNamedCurves.getOID(name);
        if (oid == null)
        {
            oid = NISTNamedCurves.getOID(name);
        }
        if (oid == null)
        {
            oid = TeleTrusTNamedCurves.getOID(name);
        }
        if (oid == null)
        {
            oid = ECGOST3410NamedCurves.getOID(name);
        }
        if (oid == null)
        {
            oid = ANSSINamedCurves.getOID(name);
        }
    }

    return oid;
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
private void populateFromPubKeyInfo(SubjectPublicKeyInfo info)
{
    DERBitString bits = info.getPublicKeyData();
    ASN1OctetString key;
    this.algorithm = "ECGOST3410";

    try
    {
        key = (ASN1OctetString)ASN1Primitive.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 = GOST3410PublicKeyAlgParameters.getInstance(info.getAlgorithm().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));

    ecSpec = new ECNamedCurveSpec(
        ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()),
        ellipticCurve,
        new ECPoint(
            spec.getG().getAffineXCoord().toBigInteger(),
            spec.getG().getAffineYCoord().toBigInteger()),
        spec.getN(), spec.getH());
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
public void performTest()
    throws Exception
{
    testCurve("prime192v1"); // X9.62
    testCurve("sect571r1"); // sec
    testCurve("secp224r1");
    testCurve("B-409");   // nist
    testCurve("P-521");
    testCurve("brainpoolp160r1");    // TeleTrusT

    for (Enumeration en = X962NamedCurves.getNames(); en.hasMoreElements();)
    {
        testECDSA((String)en.nextElement());
    }

    // these curves can't be used under JDK 1.5
    Set  problemCurves = new HashSet();

    problemCurves.add("secp256k1");
    problemCurves.add("secp160k1");
    problemCurves.add("secp224k1");
    problemCurves.add("secp192k1");
    
    for (Enumeration en = SECNamedCurves.getNames(); en.hasMoreElements();)
    {
        String curveName = (String)en.nextElement();

        if (!problemCurves.contains(curveName))
        {
            testECDSA(curveName);
        }
    }

    for (Enumeration en = TeleTrusTNamedCurves.getNames(); en.hasMoreElements();)
    {
        testECDSA((String)en.nextElement());
    }

    for (Enumeration en = ECGOST3410NamedCurves.getNames(); en.hasMoreElements();)
    {
        testECGOST((String)en.nextElement());
    }
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
private void populateFromPubKeyInfo(SubjectPublicKeyInfo info)
{
    DERBitString bits = info.getPublicKeyData();
    ASN1OctetString key;
    this.algorithm = "ECGOST3410";

    try
    {
        key = (ASN1OctetString)ASN1Primitive.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 = GOST3410PublicKeyAlgParameters.getInstance(info.getAlgorithm().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));

    ecSpec = new ECNamedCurveSpec(
        ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()),
        ellipticCurve,
        new ECPoint(
            spec.getG().getX().toBigInteger(),
            spec.getG().getY().toBigInteger()),
        spec.getN(), spec.getH());
}
 

import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; //导入依赖的package包/类
/**
 * return an enumeration of the names of the available curves.
 *
 * @return an enumeration of the names of the available curves.
 */
public static Enumeration getNames()
{
    return ECGOST3410NamedCurves.getNames();
}