org.bouncycastle.jsse.provider.KeyStoreUtil Maven / Gradle / Ivy

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The Bouncy Castle Java APIs for the TLS, including a JSSE provider. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.jsse.provider;

import java.lang.reflect.Method;
import java.security.Key;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;

abstract class KeyStoreUtil
{
    private static final Method getProtectionAlgorithm;

    static
    {
        getProtectionAlgorithm = ReflectionUtil.getMethod("java.security.KeyStore$PasswordProtection",
            "getProtectionAlgorithm");
    }

    static Key getKey(KeyStore keyStore, String alias, KeyStore.ProtectionParameter protectionParameter)
        throws KeyStoreException, NoSuchAlgorithmException, UnrecoverableKeyException
    {
        if (null == protectionParameter)
        {
            throw new UnrecoverableKeyException("requested key requires a password");
        }

        if (protectionParameter instanceof KeyStore.PasswordProtection)
        {
            KeyStore.PasswordProtection passwordProtection = (KeyStore.PasswordProtection)protectionParameter;

            if (null != getProtectionAlgorithm)
            {
                if (null != ReflectionUtil.invokeGetter(passwordProtection, getProtectionAlgorithm))
                {
                    throw new KeyStoreException("unsupported password protection algorithm");
                }
            }

            return keyStore.getKey(alias, passwordProtection.getPassword());
        }

        throw new UnsupportedOperationException();
    }
}