Examples of java.security.spec.RSAPublicKeySpec

java.security.spec.RSAPublicKeySpec
This class specifies an RSA public key. @author Jan Luehe @version 1.11 05/11/17 @see java.security.Key @see java.security.KeyFactory @see KeySpec @see X509EncodedKeySpec @see RSAPrivateKeySpec @see RSAPrivateCrtKeySpec

     * @throws NoSuchAlgorithmException
     * @throws InvalidKeySpecException
     */
    public X509CredentialImpl(BigInteger modulus, BigInteger publicExponent)
            throws NoSuchAlgorithmException, InvalidKeySpecException {
        RSAPublicKeySpec spec = new RSAPublicKeySpec(modulus, publicExponent);
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        publicKey = keyFactory.generatePublic(spec);
    }

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            BigInteger n = bar.readBigInteger();


            // Read the private key
            BigInteger p = bar.readBigInteger();
            RSAPrivateKeySpec prvSpec = new RSAPrivateKeySpec(n, p);
            RSAPublicKeySpec pubSpec = new RSAPublicKeySpec(n, e);
            KeyFactory kf = KeyFactory.getInstance("RSA");
            prvKey = (RSAPrivateKey) kf.generatePrivate(prvSpec);
            pubKey = (RSAPublicKey) kf.generatePublic(pubSpec);
        } catch (Exception e) {
            throw new InvalidSshKeyException();

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    /** @inheritDoc */
    public PublicKey getPublicKey() throws XMLSecurityException {
        try {
            KeyFactory rsaFactory = KeyFactory.getInstance("RSA");


            RSAPublicKeySpec rsaKeyspec =
                new RSAPublicKeySpec(
                    this.getBigIntegerFromChildElement(
                        Constants._TAG_MODULUS, Constants.SignatureSpecNS
                    ),
                    this.getBigIntegerFromChildElement(
                        Constants._TAG_EXPONENT, Constants.SignatureSpecNS

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     * This method creates a java.security.PublicKey object based on the public key information given in SubjectPublicKeyInfo
     * @param pubKeyInfo SubjectPublicKeyInfo instance containing the public key information.
     */
    public static PublicKey getPublicKeyObject(SubjectPublicKeyInfo pubKeyInfo) throws Exception{
        RSAPublicKeyStructure pubkeyStruct = new RSAPublicKeyStructure((ASN1Sequence)pubKeyInfo.getPublicKey());
        RSAPublicKeySpec pubkeySpec = new RSAPublicKeySpec(pubkeyStruct.getModulus(), pubkeyStruct.getPublicExponent());
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PublicKey pubKey = keyFactory.generatePublic(pubkeySpec);
        return pubKey;
    }

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                    if (pos != rawKey.length) {
                        throw new IOException("Authorized keys file line " + reader.getLineNumber() + " contains a RSA key with extra garbage.");
                    }


                    RSAPublicKeySpec ps = new RSAPublicKeySpec(modulus, e);
                    pk = rsaKeyGen.generatePublic(ps);
                } else {
                    throw new IOException("Authorized keys file line " + reader.getLineNumber() + " does not start with ssh-dss or ssh-rsa.");
                }

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            }
            Element modulusElem = DOMUtils.getFirstChildElement(kvtElem);
            BigInteger modulus = decode(modulusElem);
            Element exponentElem = DOMUtils.getNextSiblingElement(modulusElem);
            BigInteger exponent = decode(exponentElem);
            RSAPublicKeySpec spec = new RSAPublicKeySpec(modulus, exponent);
            return (RSAPublicKey) generatePublicKey(rsakf, spec);
        }

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  DefaultRSAPubKey(BigInteger exponent, BigInteger modulus) throws NoSuchAlgorithmException, InvalidKeySpecException {
    this.exp = exponent;
    this.mod = modulus;


    rpk =  (RSAPublicKey)getInstance("RSA").
        generatePublic( new RSAPublicKeySpec(mod,exp));
  }

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       pubk = RSAPublicKeyStructure.getInstance(pkInfo.getPublicKey());
    } catch (IOException e) {
      e.printStackTrace();
    }


    RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(pubk.getModulus(), pubk.getPublicExponent());
        KeyFactory factory;


        try {
            factory = KeyFactory.getInstance("RSA");
        } catch (NoSuchAlgorithmException e) {

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    {
        ASN1InputStream ais = new ASN1InputStream(readBytes(endMarker));
        Object asnObject = ais.readObject();
        ASN1Sequence sequence = (ASN1Sequence)asnObject;
        RSAPublicKeyStructure rsaPubStructure = new RSAPublicKeyStructure(sequence);
        RSAPublicKeySpec keySpec = new RSAPublicKeySpec(
                    rsaPubStructure.getModulus(), 
                    rsaPubStructure.getPublicExponent());


        try 
        {

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            DERInteger              p2 = (DERInteger)seq.getObjectAt(5);
            DERInteger              exp1 = (DERInteger)seq.getObjectAt(6);
            DERInteger              exp2 = (DERInteger)seq.getObjectAt(7);
            DERInteger              crtCoef = (DERInteger)seq.getObjectAt(8);


            pubSpec = new RSAPublicKeySpec(
                        mod.getValue(), pubExp.getValue());
            privSpec = new RSAPrivateCrtKeySpec(
                    mod.getValue(), pubExp.getValue(), privExp.getValue(),
                    p1.getValue(), p2.getValue(),
                    exp1.getValue(), exp2.getValue(),

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