Example usage for org.bouncycastle.asn1.sec ECPrivateKey getInstance

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.sec ECPrivateKey getInstance.

Prototype

public static ECPrivateKey getInstance(Object obj) 

Source Link

Usage

From source file:de.tsenger.animamea.ta.CertificateProvider.java

License:Open Source License

public ECPrivateKey getPrivateKey() throws IOException {
    ASN1Sequence pkSeq = null;/*  w w w. j  a  v  a2  s.  co m*/
    pkSeq = (ASN1Sequence) ASN1Sequence.fromByteArray(pkBytes);

    PrivateKeyInfo pkInfo = new PrivateKeyInfo(pkSeq);
    ECPrivateKey ecpk = ECPrivateKey.getInstance(pkInfo.parsePrivateKey());
    return ecpk;
}

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From source file:de.tsenger.sandbox.PKCS8PrivateKey.java

License:Open Source License

public static void main(String[] args) throws IOException {
    byte[] pkBytes = readBinaryFile(
            "/home/tsenger/Dokumente/Programming/animamea/certs/Key_DEATTIDBSIDE003.pkcs8");

    DERSequence pkSeq = (DERSequence) DERSequence.fromByteArray(pkBytes);

    PrivateKeyInfo pkInfo = new PrivateKeyInfo(pkSeq);

    AlgorithmIdentifier ecPublicKey = pkInfo.getPrivateKeyAlgorithm();
    System.out.println(ecPublicKey.getAlgorithm().toString());
    System.out.println(HexString.bufferToHex(ecPublicKey.getEncoded(null)));

    X9ECParameters ecp = X9ECParameters.getInstance(ecPublicKey.getParameters());

    System.out.println("N: \n" + HexString.bufferToHex(Converter.bigIntToByteArray(ecp.getN())));

    ECPrivateKey ecpk2 = ECPrivateKey.getInstance(ecPublicKey);
    //ECPrivateKey.getInstance(pkInfo.getPrivateKey());
    System.out.println("private Key: \n" + HexString.bufferToHex(Converter.bigIntToByteArray(ecpk2.getKey())));

}

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From source file:edu.tamu.tcat.crypto.bouncycastle.ASN1SeqKeyImpl.java

License:Apache License

private static PrivateKey decodeECKey(byte[] encodedKey) throws EncodingException {
    try {/*from   www  .  java  2  s . co  m*/
        ECPrivateKey priv = ECPrivateKey.getInstance(encodedKey);
        ASN1Sequence parameters = (ASN1Sequence) priv.getParameters();

        ASN1Integer version = (ASN1Integer) parameters.getObjectAt(0);
        if (version.getPositiveValue().intValue() != 1)
            throw new EncodingException("Only know how to decode version 1");
        ASN1Sequence fieldId = (ASN1Sequence) parameters.getObjectAt(1);
        ASN1Encodable fieldType = fieldId.getObjectAt(0);
        ECField field;
        if (fieldType.toString().equals("1.2.840.10045.1.1")) {
            ASN1Integer primeObject = (ASN1Integer) fieldId.getObjectAt(1);
            field = new ECFieldFp(primeObject.getPositiveValue());
        } else
            throw new EncodingException("Only know how to decode prime fields");
        ASN1Sequence curveSeq = (ASN1Sequence) parameters.getObjectAt(2);

        ASN1OctetString a = (ASN1OctetString) curveSeq.getObjectAt(0);
        ASN1OctetString b = (ASN1OctetString) curveSeq.getObjectAt(1);
        EllipticCurve curve;
        if (curveSeq.size() > 2) {
            DERBitString seed = (DERBitString) curveSeq.getObjectAt(2);
            curve = new EllipticCurve(field, getInteger(a.getOctets()), getInteger(b.getOctets()),
                    seed.getBytes());
        } else
            curve = new EllipticCurve(field, getInteger(a.getOctets()), getInteger(b.getOctets()));

        ASN1OctetString gEncoded = (ASN1OctetString) parameters.getObjectAt(3);
        ECPoint g = ECPointUtil.decodePoint(curve, gEncoded.getOctets());
        ASN1Integer n = (ASN1Integer) parameters.getObjectAt(4);
        ASN1Integer h = (ASN1Integer) parameters.getObjectAt(5);
        ECParameterSpec paramSpec = new ECParameterSpec(curve, g, n.getPositiveValue(),
                h.getPositiveValue().intValue());

        ECPrivateKeySpec spec = new ECPrivateKeySpec(priv.getKey(), paramSpec);
        KeyFactory factory = KeyFactory.getInstance("EC", Activator.getDefault().getBouncyCastleProvider());
        PrivateKey key = factory.generatePrivate(spec);
        return key;
    } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
        throw new EncodingException("Failed decoding type [EC]", e);
    }
}

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From source file:org.cryptoworkshop.ximix.node.crypto.key.ECKeyManager.java

License:Apache License

public synchronized void load(char[] password, byte[] encoding) throws IOException, GeneralSecurityException {
    try {//from w  ww .  java  2  s. com
        PKCS12PfxPdu pfx = new PKCS12PfxPdu(encoding);
        InputDecryptorProvider inputDecryptorProvider = new JcePKCSPBEInputDecryptorProviderBuilder()
                .setProvider("BC").build(password);
        ContentInfo[] infos = pfx.getContentInfos();

        for (int i = 0; i != infos.length; i++) {
            if (infos[i].getContentType().equals(PKCSObjectIdentifiers.encryptedData)) {
                PKCS12SafeBagFactory dataFact = new PKCS12SafeBagFactory(infos[i], inputDecryptorProvider);

                PKCS12SafeBag[] bags = dataFact.getSafeBags();

                Attribute[] attributes = bags[0].getAttributes();

                X509CertificateHolder cert = (X509CertificateHolder) bags[0].getBagValue();

                String keyID = getKeyID(attributes);
                ECPublicKeyParameters publicKeyParameters = (ECPublicKeyParameters) PublicKeyFactory
                        .createKey(cert.getSubjectPublicKeyInfo());

                paramsMap.put(keyID, publicKeyParameters.getParameters());
                sharedPublicKeyMap.init(keyID, 1);
                sharedPublicKeyMap.addValue(keyID, new ECPointShare(ASN1Integer.getInstance(
                        cert.getExtension(XimixObjectIdentifiers.ximixShareIdExtension).getParsedValue())
                        .getValue().intValue(), publicKeyParameters.getQ()));

                if (KeyUsage.fromExtensions(cert.getExtensions()).hasUsages(KeyUsage.digitalSignature)) {
                    signingKeys.add(keyID);
                }
            } else {
                PKCS12SafeBagFactory dataFact = new PKCS12SafeBagFactory(infos[i]);

                PKCS12SafeBag[] bags = dataFact.getSafeBags();
                String keyID = getKeyID(bags[0].getAttributes());

                PKCS8EncryptedPrivateKeyInfo encInfo = (PKCS8EncryptedPrivateKeyInfo) bags[0].getBagValue();
                PrivateKeyInfo info = encInfo.decryptPrivateKeyInfo(inputDecryptorProvider);

                sharedPrivateKeyMap.init(keyID, 1);
                sharedPrivateKeyMap.addValue(keyID,
                        new BigIntegerShare(sharedPublicKeyMap.getShare(keyID).getSequenceNo(),
                                ECPrivateKey.getInstance(info.parsePrivateKey()).getKey()));
            }
        }
    } catch (PKCSException e) {
        throw new GeneralSecurityException("Unable to load key store: " + e.getMessage(), e);
    }
}

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