Example usage for org.bouncycastle.asn1.pkcs PBES2Parameters getInstance

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.pkcs PBES2Parameters getInstance.

Prototype

public static PBES2Parameters getInstance(Object obj) 

Source Link

Usage

From source file:org.cryptacular.asn.PKCS8PrivateKeyDecoder.java

License:Open Source License

@Override
protected byte[] decryptKey(final byte[] encrypted, final char[] password) {
    final EncryptionScheme scheme;
    final EncryptedPrivateKeyInfo ki = EncryptedPrivateKeyInfo.getInstance(tryConvertPem(encrypted));
    final AlgorithmIdentifier alg = ki.getEncryptionAlgorithm();
    if (PKCSObjectIdentifiers.id_PBES2.equals(alg.getAlgorithm())) {
        scheme = new PBES2EncryptionScheme(PBES2Parameters.getInstance(alg.getParameters()), password);
    } else {/*from  www  .  ja  va 2s.c  o m*/
        scheme = new PBES1EncryptionScheme(PBES1Algorithm.fromOid(alg.getAlgorithm().getId()),
                PBEParameter.getInstance(alg.getParameters()), password);
    }
    return scheme.decrypt(ki.getEncryptedData());
}

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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;/*from   w  w  w  .j av a  2s  . 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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