Examples with RSAPrivateCrtKeyParameters org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters used on opensource projects

Example 1 with RSAPrivateCrtKeyParameters

use of org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters in project robovm by robovm.

the class RSABlindedEngine method processBlock.

/**
     * Process a single block using the basic RSA algorithm.
     *
     * @param in the input array.
     * @param inOff the offset into the input buffer where the data starts.
     * @param inLen the length of the data to be processed.
     * @return the result of the RSA process.
     * @exception DataLengthException the input block is too large.
     */
public byte[] processBlock(byte[] in, int inOff, int inLen) {
    if (key == null) {
        throw new IllegalStateException("RSA engine not initialised");
    }
    BigInteger input = core.convertInput(in, inOff, inLen);
    BigInteger result;
    if (key instanceof RSAPrivateCrtKeyParameters) {
        RSAPrivateCrtKeyParameters k = (RSAPrivateCrtKeyParameters) key;
        BigInteger e = k.getPublicExponent();
        if (// can't do blinding without a public exponent
        e != null) {
            BigInteger m = k.getModulus();
            BigInteger r = BigIntegers.createRandomInRange(ONE, m.subtract(ONE), random);
            BigInteger blindedInput = r.modPow(e, m).multiply(input).mod(m);
            BigInteger blindedResult = core.processBlock(blindedInput);
            BigInteger rInv = r.modInverse(m);
            result = blindedResult.multiply(rInv).mod(m);
        } else {
            result = core.processBlock(input);
        }
    } else {
        result = core.processBlock(input);
    }
    return core.convertOutput(result);
}

Example 2 with RSAPrivateCrtKeyParameters

use of org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters in project robovm by robovm.

the class PrivateKeyFactory method createKey.

/**
     * Create a private key parameter from the passed in PKCS8 PrivateKeyInfo object.
     * 
     * @param keyInfo the PrivateKeyInfo object containing the key material
     * @return a suitable private key parameter
     * @throws IOException on an error decoding the key
     */
public static AsymmetricKeyParameter createKey(PrivateKeyInfo keyInfo) throws IOException {
    AlgorithmIdentifier algId = keyInfo.getPrivateKeyAlgorithm();
    if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.rsaEncryption)) {
        RSAPrivateKey keyStructure = RSAPrivateKey.getInstance(keyInfo.parsePrivateKey());
        return new RSAPrivateCrtKeyParameters(keyStructure.getModulus(), keyStructure.getPublicExponent(), keyStructure.getPrivateExponent(), keyStructure.getPrime1(), keyStructure.getPrime2(), keyStructure.getExponent1(), keyStructure.getExponent2(), keyStructure.getCoefficient());
    } else //      else if (algId.getObjectId().equals(X9ObjectIdentifiers.dhpublicnumber))
    if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
        DHParameter params = DHParameter.getInstance(algId.getParameters());
        ASN1Integer derX = (ASN1Integer) keyInfo.parsePrivateKey();
        BigInteger lVal = params.getL();
        int l = lVal == null ? 0 : lVal.intValue();
        DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);
        return new DHPrivateKeyParameters(derX.getValue(), dhParams);
    } else // END android-removed
    if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_dsa)) {
        ASN1Integer derX = (ASN1Integer) keyInfo.parsePrivateKey();
        ASN1Encodable de = algId.getParameters();
        DSAParameters parameters = null;
        if (de != null) {
            DSAParameter params = DSAParameter.getInstance(de.toASN1Primitive());
            parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
        }
        return new DSAPrivateKeyParameters(derX.getValue(), parameters);
    } else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey)) {
        X962Parameters params = new X962Parameters((ASN1Primitive) algId.getParameters());
        X9ECParameters x9;
        if (params.isNamedCurve()) {
            ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters());
            x9 = X962NamedCurves.getByOID(oid);
            if (x9 == null) {
                x9 = SECNamedCurves.getByOID(oid);
                if (x9 == null) {
                    x9 = NISTNamedCurves.getByOID(oid);
                // BEGIN android-removed
                // if (x9 == null)
                // {
                //     x9 = TeleTrusTNamedCurves.getByOID(oid);
                // }
                // END android-removed
                }
            }
        } else {
            x9 = X9ECParameters.getInstance(params.getParameters());
        }
        ECPrivateKey ec = ECPrivateKey.getInstance(keyInfo.parsePrivateKey());
        BigInteger d = ec.getKey();
        // TODO We lose any named parameters here
        ECDomainParameters dParams = new ECDomainParameters(x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());
        return new ECPrivateKeyParameters(d, dParams);
    } else {
        throw new RuntimeException("algorithm identifier in key not recognised");
    }
}

Example 3 with RSAPrivateCrtKeyParameters

use of org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters in project XobotOS by xamarin.

the class PrivateKeyFactory method createKey.

/**
     * Create a private key parameter from the passed in PKCS8 PrivateKeyInfo object.
     * 
     * @param keyInfo the PrivateKeyInfo object containing the key material
     * @return a suitable private key parameter
     * @throws IOException on an error decoding the key
     */
public static AsymmetricKeyParameter createKey(PrivateKeyInfo keyInfo) throws IOException {
    AlgorithmIdentifier algId = keyInfo.getAlgorithmId();
    if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.rsaEncryption)) {
        RSAPrivateKeyStructure keyStructure = new RSAPrivateKeyStructure((ASN1Sequence) keyInfo.getPrivateKey());
        return new RSAPrivateCrtKeyParameters(keyStructure.getModulus(), keyStructure.getPublicExponent(), keyStructure.getPrivateExponent(), keyStructure.getPrime1(), keyStructure.getPrime2(), keyStructure.getExponent1(), keyStructure.getExponent2(), keyStructure.getCoefficient());
    } else //      else if (algId.getObjectId().equals(X9ObjectIdentifiers.dhpublicnumber))
    if (algId.getObjectId().equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
        DHParameter params = new DHParameter((ASN1Sequence) keyInfo.getAlgorithmId().getParameters());
        DERInteger derX = (DERInteger) keyInfo.getPrivateKey();
        BigInteger lVal = params.getL();
        int l = lVal == null ? 0 : lVal.intValue();
        DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);
        return new DHPrivateKeyParameters(derX.getValue(), dhParams);
    } else // END android-removed
    if (algId.getObjectId().equals(X9ObjectIdentifiers.id_dsa)) {
        DERInteger derX = (DERInteger) keyInfo.getPrivateKey();
        DEREncodable de = keyInfo.getAlgorithmId().getParameters();
        DSAParameters parameters = null;
        if (de != null) {
            DSAParameter params = DSAParameter.getInstance(de.getDERObject());
            parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
        }
        return new DSAPrivateKeyParameters(derX.getValue(), parameters);
    } else if (algId.getObjectId().equals(X9ObjectIdentifiers.id_ecPublicKey)) {
        X962Parameters params = new X962Parameters((DERObject) keyInfo.getAlgorithmId().getParameters());
        ECDomainParameters dParams = null;
        if (params.isNamedCurve()) {
            DERObjectIdentifier oid = (DERObjectIdentifier) params.getParameters();
            X9ECParameters ecP = X962NamedCurves.getByOID(oid);
            if (ecP == null) {
                ecP = SECNamedCurves.getByOID(oid);
                if (ecP == null) {
                    ecP = NISTNamedCurves.getByOID(oid);
                // BEGIN android-removed
                // if (ecP == null)
                // {
                //     ecP = TeleTrusTNamedCurves.getByOID(oid);
                // }
                // END android-removed
                }
            }
            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());
        }
        ECPrivateKeyStructure ec = new ECPrivateKeyStructure((ASN1Sequence) keyInfo.getPrivateKey());
        return new ECPrivateKeyParameters(ec.getKey(), dParams);
    } else {
        throw new RuntimeException("algorithm identifier in key not recognised");
    }
}

Example 4 with RSAPrivateCrtKeyParameters

use of org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters in project 360-Engine-for-Android by 360.

the class RSACoreEngine method processBlock.

public BigInteger processBlock(BigInteger input) {
    if (key instanceof RSAPrivateCrtKeyParameters) {
        //
        // we have the extra factors, use the Chinese Remainder Theorem -
        // the author
        // wishes to express his thanks to Dirk Bonekaemper at rtsffm.com
        // for
        // advice regarding the expression of this.
        //
        RSAPrivateCrtKeyParameters crtKey = (RSAPrivateCrtKeyParameters) key;
        BigInteger p = crtKey.getP();
        BigInteger q = crtKey.getQ();
        BigInteger dP = crtKey.getDP();
        BigInteger dQ = crtKey.getDQ();
        BigInteger qInv = crtKey.getQInv();
        BigInteger mP, mQ, h, m;
        // mP = ((input mod p) ^ dP)) mod p
        mP = (input.remainder(p)).modPow(dP, p);
        // mQ = ((input mod q) ^ dQ)) mod q
        mQ = (input.remainder(q)).modPow(dQ, q);
        // h = qInv * (mP - mQ) mod p
        h = mP.subtract(mQ);
        h = h.multiply(qInv);
        // mod (in Java) returns the positive residual
        h = h.mod(p);
        // m = h * q + mQ
        m = h.multiply(q);
        m = m.add(mQ);
        return m;
    } else {
        return input.modPow(key.getExponent(), key.getModulus());
    }
}

Example 5 with RSAPrivateCrtKeyParameters

use of org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters in project robovm by robovm.

the class KeyPairGeneratorSpi method generateKeyPair.

public KeyPair generateKeyPair() {
    AsymmetricCipherKeyPair pair = engine.generateKeyPair();
    RSAKeyParameters pub = (RSAKeyParameters) pair.getPublic();
    RSAPrivateCrtKeyParameters priv = (RSAPrivateCrtKeyParameters) pair.getPrivate();
    return new KeyPair(new BCRSAPublicKey(pub), new BCRSAPrivateCrtKey(priv));
}