Examples with AlgorithmParameters java.security.AlgorithmParameters used on opensource projects

Example 76 with AlgorithmParameters

use of java.security.AlgorithmParameters in project XobotOS by xamarin.

the class SealedObject method getObject.

/**
     * Returns the wrapped object, decrypting it using the specified key. The
     * specified provider is used to retrieve the cipher algorithm.
     *
     * @param key
     *            the key to decrypt the data.
     * @param provider
     *            the name of the provider that provides the cipher algorithm.
     * @return the encapsulated object.
     * @throws IOException
     *             if deserialization fails.
     * @throws ClassNotFoundException
     *             if deserialization fails.
     * @throws NoSuchAlgorithmException
     *             if the algorithm used to decrypt the data is not available.
     * @throws NoSuchProviderException
     *             if the specified provider is not available.
     * @throws InvalidKeyException
     *             if the specified key cannot be used to decrypt the data.
     */
public final Object getObject(Key key, String provider) throws IOException, ClassNotFoundException, NoSuchAlgorithmException, NoSuchProviderException, InvalidKeyException {
    if (provider == null || provider.isEmpty()) {
        throw new IllegalArgumentException("provider name empty or null");
    }
    try {
        Cipher cipher = Cipher.getInstance(sealAlg, provider);
        if ((paramsAlg != null) && (paramsAlg.length() != 0)) {
            AlgorithmParameters params = AlgorithmParameters.getInstance(paramsAlg);
            params.init(encodedParams);
            cipher.init(Cipher.DECRYPT_MODE, key, params);
        } else {
            cipher.init(Cipher.DECRYPT_MODE, key);
        }
        byte[] serialized = cipher.doFinal(encryptedContent);
        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(serialized));
        return ois.readObject();
    } catch (NoSuchPaddingException e) {
        // with existing padding
        throw new NoSuchAlgorithmException(e.toString());
    } catch (InvalidAlgorithmParameterException e) {
        // with correct algorithm parameters
        throw new NoSuchAlgorithmException(e.toString());
    } catch (IllegalBlockSizeException e) {
        // was correctly made
        throw new NoSuchAlgorithmException(e.toString());
    } catch (BadPaddingException e) {
        // was correctly made
        throw new NoSuchAlgorithmException(e.toString());
    } catch (IllegalStateException e) {
        // should never be thrown because cipher is initialized
        throw new NoSuchAlgorithmException(e.toString());
    }
}

Example 77 with AlgorithmParameters

use of java.security.AlgorithmParameters in project XobotOS by xamarin.

the class JCEStreamCipher method engineGetParameters.

protected AlgorithmParameters engineGetParameters() {
    if (engineParams == null) {
        if (pbeSpec != null) {
            try {
                AlgorithmParameters engineParams = AlgorithmParameters.getInstance(pbeAlgorithm, BouncyCastleProvider.PROVIDER_NAME);
                engineParams.init(pbeSpec);
                return engineParams;
            } catch (Exception e) {
                return null;
            }
        }
    }
    return engineParams;
}

Example 78 with AlgorithmParameters

use of java.security.AlgorithmParameters in project android_frameworks_base by DirtyUnicorns.

the class AndroidKeyStoreUnauthenticatedAESCipherSpi method engineGetParameters.

@Nullable
@Override
protected final AlgorithmParameters engineGetParameters() {
    if (!mIvRequired) {
        return null;
    }
    if ((mIv != null) && (mIv.length > 0)) {
        try {
            AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
            params.init(new IvParameterSpec(mIv));
            return params;
        } catch (NoSuchAlgorithmException e) {
            throw new ProviderException("Failed to obtain AES AlgorithmParameters", e);
        } catch (InvalidParameterSpecException e) {
            throw new ProviderException("Failed to initialize AES AlgorithmParameters with an IV", e);
        }
    }
    return null;
}

Example 79 with AlgorithmParameters

use of java.security.AlgorithmParameters in project jdk8u_jdk by JetBrains.

the class CipherForKeyProtector method recover.

/*
     * Recovers the cleartext version of the given key (in protected format),
     * using the password provided at construction time.
     */
Key recover(EncryptedPrivateKeyInfo encrInfo) throws UnrecoverableKeyException, NoSuchAlgorithmException {
    byte[] plain;
    try {
        String encrAlg = encrInfo.getAlgorithm().getOID().toString();
        if (!encrAlg.equals(PBE_WITH_MD5_AND_DES3_CBC_OID) && !encrAlg.equals(KEY_PROTECTOR_OID)) {
            throw new UnrecoverableKeyException("Unsupported encryption " + "algorithm");
        }
        if (encrAlg.equals(KEY_PROTECTOR_OID)) {
            // JDK 1.2 style recovery
            plain = recover(encrInfo.getEncryptedData());
        } else {
            byte[] encodedParams = encrInfo.getAlgorithm().getEncodedParams();
            // parse the PBE parameters into the corresponding spec
            AlgorithmParameters pbeParams = AlgorithmParameters.getInstance("PBE");
            pbeParams.init(encodedParams);
            PBEParameterSpec pbeSpec = pbeParams.getParameterSpec(PBEParameterSpec.class);
            // create PBE key from password
            PBEKeySpec pbeKeySpec = new PBEKeySpec(this.password);
            SecretKey sKey = new PBEKey(pbeKeySpec, "PBEWithMD5AndTripleDES");
            pbeKeySpec.clearPassword();
            // decrypt private key
            PBEWithMD5AndTripleDESCipher cipher;
            cipher = new PBEWithMD5AndTripleDESCipher();
            cipher.engineInit(Cipher.DECRYPT_MODE, sKey, pbeSpec, null);
            plain = cipher.engineDoFinal(encrInfo.getEncryptedData(), 0, encrInfo.getEncryptedData().length);
        }
        // determine the private-key algorithm, and parse private key
        // using the appropriate key factory
        String oidName = new AlgorithmId(new PrivateKeyInfo(plain).getAlgorithm().getOID()).getName();
        KeyFactory kFac = KeyFactory.getInstance(oidName);
        return kFac.generatePrivate(new PKCS8EncodedKeySpec(plain));
    } catch (NoSuchAlgorithmException ex) {
        // later catch of GeneralSecurityException
        throw ex;
    } catch (IOException ioe) {
        throw new UnrecoverableKeyException(ioe.getMessage());
    } catch (GeneralSecurityException gse) {
        throw new UnrecoverableKeyException(gse.getMessage());
    }
}

Example 80 with AlgorithmParameters

use of java.security.AlgorithmParameters in project jdk8u_jdk by JetBrains.

the class CipherForKeyProtector method unseal.

/**
     * Unseals the sealed key.
     */
Key unseal(SealedObject so) throws NoSuchAlgorithmException, UnrecoverableKeyException {
    try {
        // create PBE key from password
        PBEKeySpec pbeKeySpec = new PBEKeySpec(this.password);
        SecretKey skey = new PBEKey(pbeKeySpec, "PBEWithMD5AndTripleDES");
        pbeKeySpec.clearPassword();
        SealedObjectForKeyProtector soForKeyProtector = null;
        if (!(so instanceof SealedObjectForKeyProtector)) {
            soForKeyProtector = new SealedObjectForKeyProtector(so);
        } else {
            soForKeyProtector = (SealedObjectForKeyProtector) so;
        }
        AlgorithmParameters params = soForKeyProtector.getParameters();
        if (params == null) {
            throw new UnrecoverableKeyException("Cannot get " + "algorithm parameters");
        }
        PBEWithMD5AndTripleDESCipher cipherSpi;
        cipherSpi = new PBEWithMD5AndTripleDESCipher();
        Cipher cipher = new CipherForKeyProtector(cipherSpi, SunJCE.getInstance(), "PBEWithMD5AndTripleDES");
        cipher.init(Cipher.DECRYPT_MODE, skey, params);
        return (Key) soForKeyProtector.getObject(cipher);
    } catch (NoSuchAlgorithmException ex) {
        // later catch of GeneralSecurityException
        throw ex;
    } catch (IOException ioe) {
        throw new UnrecoverableKeyException(ioe.getMessage());
    } catch (ClassNotFoundException cnfe) {
        throw new UnrecoverableKeyException(cnfe.getMessage());
    } catch (GeneralSecurityException gse) {
        throw new UnrecoverableKeyException(gse.getMessage());
    }
}