Package org.bouncycastle.asn1.x9

Examples of org.bouncycastle.asn1.x9.X9ECParameters

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    if (! critParamChecker.headerPasses(header)) {
      return false;
    }

    ECDSAParameters initParams = getECDSAParameters(header.getAlgorithm());
    X9ECParameters x9ECParameters = initParams.getX9ECParameters();
    Digest digest = initParams.getDigest();

    byte[] signatureBytes = signature.decode();

    // Split signature into R and S parts
    int rsByteArrayLength = ECDSAProvider.getSignatureByteArrayLength(header.getAlgorithm());

    byte[] rBytes = new byte[rsByteArrayLength / 2];
    byte[] sBytes = new byte[rsByteArrayLength / 2];

    try {
      System.arraycopy(signatureBytes, 0, rBytes, 0, rBytes.length);
      System.arraycopy(signatureBytes, rBytes.length, sBytes, 0, sBytes.length);

    } catch (Exception e) {

      throw new JOSEException("Invalid ECDSA signature format: " + e.getMessage(), e);
    }

    BigInteger r = new BigInteger(1, rBytes);
    BigInteger s = new BigInteger(1, sBytes);


    ECCurve curve = x9ECParameters.getCurve();
    ECPoint q = curve.createPoint(x, y);

    ECDomainParameters ecDomainParameters = new ECDomainParameters(
      curve,
      x9ECParameters.getG(),
      x9ECParameters.getN(),
      x9ECParameters.getH(),
      x9ECParameters.getSeed());

    ECPublicKeyParameters ecPublicKeyParameters = new ECPublicKeyParameters(
      q, ecDomainParameters);

    org.bouncycastle.crypto.signers.ECDSASigner verifier =
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        throws Exception
    {
        String keyStorePass = "myPass";
        ASN1InputStream in = new ASN1InputStream(new ByteArrayInputStream(
                ecParameterEncoded));
        X9ECParameters params = new X9ECParameters((ASN1Sequence)in
                .readObject());
        KeyPair kp = null;
        boolean success = false;
        while (!success)
        {
            KeyPairGenerator kpg = KeyPairGenerator.getInstance("ECDSA");
            kpg.initialize(new ECParameterSpec(params.getCurve(),
                    params.getG(), params.getN(), params.getH(), params
                            .getSeed()));
            kp = kpg.generateKeyPair();
            // The very old Problem... we need a certificate chain to
            // save a private key...
            JCEECPublicKey pubKey = (JCEECPublicKey)kp.getPublic();
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    }
   
    public static X9ECParameters getNamedCurveByOid(
        DERObjectIdentifier oid)
    {
        X9ECParameters params = X962NamedCurves.getByOID(oid);
       
        if (params == null)
        {
            params = SECNamedCurves.getByOID(oid);
            if (params == null)
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            ECCurve                 curve;

            if (params.isNamedCurve())
            {
                DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
                X9ECParameters      ecP = ECUtil.getNamedCurveByOid(oid);
   
                ecSpec = new ECNamedCurveParameterSpec(
                                            ECUtil.getCurveName(oid),
                                            ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
                curve = ((ECParameterSpec)ecSpec).getCurve();
            }
            else if (params.isImplicitlyCA())
            {
                ecSpec = null;
                curve = ProviderUtil.getEcImplicitlyCa().getCurve();
            }
            else
            {
                X9ECParameters ecP = new X9ECParameters(
                            (ASN1Sequence)params.getParameters());
                ecSpec = new ECParameterSpec(
                                            ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
                curve = ((ECParameterSpec)ecSpec).getCurve();
            }
   
            DERBitString    bits = info.getPublicKeyData();
            byte[]          data = bits.getBytes();
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                else
                {
                    throw new UnsupportedOperationException("Subclass of ECPoint " + curve.getClass().toString() + "not supported");
                }

                X9ECParameters ecP = new X9ECParameters(
                    p.getCurve(), generator, p.getN(), p.getH(), p.getSeed());

                params = new X962Parameters(ecP);
            }
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        X962Parameters      params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());

        if (params.isNamedCurve())
        {
            DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
            X9ECParameters      ecP = ECUtil.getNamedCurveByOid(oid);

            ecSpec = new ECNamedCurveParameterSpec(
                                        ECUtil.getCurveName(oid),
                                        ecP.getCurve(),
                                        ecP.getG(),
                                        ecP.getN(),
                                        ecP.getH(),
                                        ecP.getSeed());
        }
        else if (params.isImplicitlyCA())
        {
            ecSpec = null;
        }
        else
        {
            X9ECParameters          ecP = new X9ECParameters((ASN1Sequence)params.getParameters());
            ecSpec = new ECParameterSpec(ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
        }

        if (info.getPrivateKey() instanceof DERInteger)
        {
            DERInteger          derD = (DERInteger)info.getPrivateKey();
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            else
            {
                throw new UnsupportedOperationException("Subclass of ECPoint " + curve.getClass().toString() + "not supported");
            }
           
            X9ECParameters ecP = new X9ECParameters(
                  p.getCurve(),
                  generator,
                  p.getN(),
                  p.getH(),
                  p.getSeed());
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            ECDomainParameters  dParams = null;
           
            if (params.isNamedCurve())
            {
                DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
                X9ECParameters      ecP = X962NamedCurves.getByOID(oid);

                dParams = new ECDomainParameters(
                                            ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
            }
            else
            {
                X9ECParameters ecP = new X9ECParameters(
                            (ASN1Sequence)params.getParameters());
                dParams = new ECDomainParameters(
                                            ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
            }

            DERBitString    bits = keyInfo.getPublicKeyData();
            byte[]          data = bits.getBytes();
            ASN1OctetString key = new DEROctetString(data);
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  @Override
  public Base64URL sign(final JWSHeader header, final byte[] signingInput)
    throws JOSEException {

    ECDSAParameters initParams = getECDSAParameters(header.getAlgorithm());
    X9ECParameters x9ECParameters = initParams.getX9ECParameters();
    Digest digest = initParams.getDigest();

    ECDomainParameters ecParameterSpec = new ECDomainParameters(
      x9ECParameters.getCurve(),
      x9ECParameters.getG(),
      x9ECParameters.getN(),
      x9ECParameters.getH(),
      x9ECParameters.getSeed());

    ECPrivateKeyParameters ecPrivateKeyParameters =
      new ECPrivateKeyParameters(privateKey, ecParameterSpec);

    digest.update(signingInput, 0, signingInput.length);
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    } else {
      throw new JOSEException("Unsupported ECDSA algorithm, must be ES256, ES384 or ES512");
    }

    X9ECParameters x9ECParams = SECNamedCurves.getByOID(oid);

    return new ECDSAParameters(x9ECParams, digest);
  }
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Related Classes of org.bouncycastle.asn1.x9.X9ECParameters

  • com.nimbusds.jose.crypto.ECDSAProvider
  • com.nimbusds.jose.crypto.ECDSASigner
  • com.nimbusds.jose.crypto.ECDSAVerifier
  • org.bouncycastle.asn1.ASN1Encodable
  • org.bouncycastle.asn1.ASN1EncodableVector
  • org.bouncycastle.asn1.ASN1Integer
  • org.bouncycastle.asn1.ASN1ObjectIdentifier
  • org.bouncycastle.asn1.ASN1SequenceParser
  • org.bouncycastle.asn1.BERSequence
  • org.bouncycastle.asn1.BERTaggedObject
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