org.bouncycastle.openssl.jcajce.JcePEMDecryptorProviderBuilder Maven / Gradle / Ivy

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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. 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.

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package org.bouncycastle.openssl.jcajce;

import java.security.Provider;

import org.bouncycastle.jcajce.util.DefaultJcaJceHelper;
import org.bouncycastle.jcajce.util.JcaJceHelper;
import org.bouncycastle.jcajce.util.NamedJcaJceHelper;
import org.bouncycastle.jcajce.util.ProviderJcaJceHelper;
import org.bouncycastle.openssl.PEMDecryptor;
import org.bouncycastle.openssl.PEMDecryptorProvider;
import org.bouncycastle.openssl.PEMException;
import org.bouncycastle.openssl.PasswordException;

public class JcePEMDecryptorProviderBuilder
{
    private JcaJceHelper helper = new DefaultJcaJceHelper();

    public JcePEMDecryptorProviderBuilder setProvider(Provider provider)
    {
        this.helper = new ProviderJcaJceHelper(provider);

        return this;
    }

    public JcePEMDecryptorProviderBuilder setProvider(String providerName)
    {
        this.helper = new NamedJcaJceHelper(providerName);

        return this;
    }

    public PEMDecryptorProvider build(final char[] password)
    {
        return new PEMDecryptorProvider()
        {
            public PEMDecryptor get(final String dekAlgName)
            {
                return new PEMDecryptor()
                {
                    public byte[] decrypt(byte[] keyBytes, byte[] iv)
                        throws PEMException
                    {
                        if (password == null)
                        {
                            throw new PasswordException("Password is null, but a password is required");
                        }

                        return PEMUtilities.crypt(false, helper, keyBytes, password, dekAlgName, iv);
                    }
                };
            }
        };
    }
}