Example usage for org.bouncycastle.asn1.pkcs RC2CBCParameter getInstance

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.pkcs RC2CBCParameter getInstance.

Prototype

public static RC2CBCParameter getInstance(Object o) 

Source Link

Usage

From source file:org.jruby.ext.openssl.x509store.PEMInputOutput.java

License:LGPL

private static PrivateKey derivePrivateKeyPBES2(EncryptedPrivateKeyInfo eIn, AlgorithmIdentifier algId,
        char[] password) throws GeneralSecurityException, InvalidCipherTextException {
    PBES2Parameters pbeParams = PBES2Parameters.getInstance((ASN1Sequence) algId.getParameters());
    CipherParameters cipherParams = extractPBES2CipherParams(password, pbeParams);

    EncryptionScheme scheme = pbeParams.getEncryptionScheme();
    BufferedBlockCipher cipher;/* w  w w .  j  ava2s .co  m*/
    if (scheme.getAlgorithm().equals(PKCSObjectIdentifiers.RC2_CBC)) {
        RC2CBCParameter rc2Params = RC2CBCParameter.getInstance(scheme);
        byte[] iv = rc2Params.getIV();
        CipherParameters param = new ParametersWithIV(cipherParams, iv);
        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new RC2Engine()));
        cipher.init(false, param);
    } else {
        byte[] iv = ((ASN1OctetString) scheme.getObject()).getOctets();
        // this version, done for BC 1.49 compat, caused #1238.
        //            byte[] iv = ASN1OctetString.getInstance(scheme).getOctets();
        CipherParameters param = new ParametersWithIV(cipherParams, iv);
        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new DESedeEngine()));
        cipher.init(false, param);
    }

    byte[] data = eIn.getEncryptedData();
    byte[] out = new byte[cipher.getOutputSize(data.length)];
    int len = cipher.processBytes(data, 0, data.length, out, 0);
    len += cipher.doFinal(out, len);
    byte[] pkcs8 = new byte[len];
    System.arraycopy(out, 0, pkcs8, 0, len);
    KeyFactory fact = KeyFactory.getInstance("RSA"); // It seems to work for both RSA and DSA.
    return fact.generatePrivate(new PKCS8EncodedKeySpec(pkcs8));
}

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From source file:org.xwiki.crypto.password.internal.pbe.factory.BcPBES2Rc2CipherFactory.java

License:Open Source License

@Override
protected PasswordBasedCipher getInstance(boolean forEncryption, byte[] password, KeyDerivationFunc kdfParams,
        EncryptionScheme scheme) {//from w  w  w.  jav  a  2s.c o m
    KeyDerivationFunction kdf = getKeyDerivationFunction(kdfParams);
    RC2CBCParameter rc2Params = RC2CBCParameter.getInstance(scheme.getParameters());

    return getPasswordBasedCipher(forEncryption, kdf, getRC2CipherParameters(password, rc2Params, kdf));
}

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