Examples with X9ECParameters org.spongycastle.asn1.x9.X9ECParameters used on opensource projects

Example 26 with X9ECParameters

use of org.spongycastle.asn1.x9.X9ECParameters in project oxAuth by GluuFederation.

the class SHA256withECDSASignatureVerification method decodePublicKey.

@Override
public PublicKey decodePublicKey(byte[] encodedPublicKey) throws SignatureException {
    X9ECParameters curve = SECNamedCurves.getByName("secp256r1");
    ECPoint point = curve.getCurve().decodePoint(encodedPublicKey);
    try {
        return KeyFactory.getInstance("ECDSA").generatePublic(new ECPublicKeySpec(point, new ECParameterSpec(curve.getCurve(), curve.getG(), curve.getN(), curve.getH())));
    } catch (GeneralSecurityException ex) {
        throw new SignatureException(ex);
    }
}

Example 27 with X9ECParameters

use of org.spongycastle.asn1.x9.X9ECParameters in project OsmAnd-tools by osmandapp.

the class SigningUtils method derivePublicKey.

/**
 * Step (8) to (11): Derive pubkey from passphrase
 * @param privBytes
 * @return
 * @throws BlockIOException
 */
static byte[] derivePublicKey(byte[] privBytes) throws BlockIOException {
    X9ECParameters params = SECNamedCurves.getByName("secp256k1");
    ECDomainParameters ecParams = new ECDomainParameters(params.getCurve(), params.getG(), params.getN(), params.getH());
    BigInteger priv = new BigInteger(1, privBytes);
    byte[] pubBytes = ecParams.getG().multiply(priv).getEncoded(true);
    return pubBytes;
}

Example 28 with X9ECParameters

use of org.spongycastle.asn1.x9.X9ECParameters in project OsmAnd-tools by osmandapp.

the class SigningUtils method signData.

static String signData(String input, byte[] key) throws BlockIOException {
    ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    X9ECParameters params = SECNamedCurves.getByName("secp256k1");
    ECDomainParameters ecParams = new ECDomainParameters(params.getCurve(), params.getG(), params.getN(), params.getH());
    BigInteger priv = new BigInteger(1, key);
    ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(priv, ecParams);
    signer.init(true, privKey);
    BigInteger[] sigs = signer.generateSignature(fromHex(input));
    BigInteger r = sigs[0];
    BigInteger s = sigs[1];
    // BIP62: "S must be less than or equal to half of the Group Order N"
    BigInteger overTwo = params.getN().shiftRight(1);
    if (s.compareTo(overTwo) == 1) {
        s = params.getN().subtract(s);
    }
    try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        DERSequenceGenerator seq = new DERSequenceGenerator(bos);
        seq.addObject(new ASN1Integer(r));
        seq.addObject(new ASN1Integer(s));
        seq.close();
        return toHex(bos.toByteArray());
    } catch (IOException e) {
        // Cannot happen.
        throw new BlockIOException("That should never happen... File an issue report.");
    }
}

Example 29 with X9ECParameters

use of org.spongycastle.asn1.x9.X9ECParameters in project xipki by xipki.

the class IaikP11Slot method generateECKeypair0.

@Override
protected P11Identity generateECKeypair0(ASN1ObjectIdentifier curveId, String label, P11NewKeyControl control) throws P11TokenException {
    long mech = PKCS11Constants.CKM_EC_KEY_PAIR_GEN;
    assertMechanismSupported(mech);
    ECPrivateKey privateKey = new ECPrivateKey();
    ECPublicKey publicKey = new ECPublicKey();
    setKeyAttributes(label, PKCS11Constants.CKK_EC, control, publicKey, privateKey);
    byte[] encodedCurveId;
    try {
        encodedCurveId = curveId.getEncoded();
    } catch (IOException ex) {
        throw new P11TokenException(ex.getMessage(), ex);
    }
    try {
        publicKey.getEcdsaParams().setByteArrayValue(encodedCurveId);
        return generateKeyPair(mech, privateKey, publicKey);
    } catch (P11TokenException ex) {
        X9ECParameters ecParams = ECNamedCurveTable.getByOID(curveId);
        if (ecParams == null) {
            throw new IllegalArgumentException("could not get X9ECParameters for curve " + curveId.getId());
        }
        try {
            publicKey.getEcdsaParams().setByteArrayValue(ecParams.getEncoded());
        } catch (IOException ex2) {
            throw new P11TokenException(ex.getMessage(), ex);
        }
        return generateKeyPair(mech, privateKey, publicKey);
    }
}

Example 30 with X9ECParameters

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

the class MessageCrypto method loadPublicKey.

private PublicKey loadPublicKey(byte[] keyBytes) throws Exception {
    Reader keyReader = new StringReader(new String(keyBytes));
    PublicKey publicKey = null;
    try (org.bouncycastle.openssl.PEMParser pemReader = new org.bouncycastle.openssl.PEMParser(keyReader)) {
        Object pemObj = pemReader.readObject();
        JcaPEMKeyConverter pemConverter = new JcaPEMKeyConverter();
        SubjectPublicKeyInfo keyInfo = null;
        X9ECParameters ecParam = null;
        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 Public 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: " + ((ASN1ObjectIdentifier) pemObj).getId());
            }
            pemObj = pemReader.readObject();
        } else if (pemObj instanceof X9ECParameters) {
            ecParam = (X9ECParameters) pemObj;
            pemObj = pemReader.readObject();
        }
        if (pemObj instanceof org.bouncycastle.cert.X509CertificateHolder) {
            keyInfo = ((org.bouncycastle.cert.X509CertificateHolder) pemObj).getSubjectPublicKeyInfo();
        } else {
            keyInfo = (SubjectPublicKeyInfo) pemObj;
        }
        publicKey = pemConverter.getPublicKey(keyInfo);
        if (ecParam != null && ECDSA.equals(publicKey.getAlgorithm())) {
            ECParameterSpec ecSpec = new ECParameterSpec(ecParam.getCurve(), ecParam.getG(), ecParam.getN(), ecParam.getH(), ecParam.getSeed());
            KeyFactory keyFactory = KeyFactory.getInstance(ECDSA, BouncyCastleProvider.PROVIDER_NAME);
            ECPublicKeySpec keySpec = new ECPublicKeySpec(((BCECPublicKey) publicKey).getQ(), ecSpec);
            publicKey = (PublicKey) keyFactory.generatePublic(keySpec);
        }
    } catch (IOException | NoSuchAlgorithmException | NoSuchProviderException | InvalidKeySpecException e) {
        throw new Exception(e);
    }
    return publicKey;
}