org.bouncycastle.openssl.jcajce.JceOpenSSLPKCS8EncryptorBuilder Maven / Gradle / Ivy

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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
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package org.bouncycastle.openssl.jcajce;

import java.io.IOException;
import java.io.OutputStream;
import java.security.AlgorithmParameterGenerator;
import java.security.AlgorithmParameters;
import java.security.GeneralSecurityException;
import java.security.Provider;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.CipherOutputStream;
import javax.crypto.SecretKey;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.KeyDerivationFunc;
import org.bouncycastle.asn1.pkcs.PBES2Parameters;
import org.bouncycastle.asn1.pkcs.PBKDF2Params;
import org.bouncycastle.asn1.pkcs.PKCS12PBEParams;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.jcajce.PKCS12KeyWithParameters;
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.operator.GenericKey;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.OutputEncryptor;
import org.bouncycastle.operator.jcajce.JceGenericKey;

public class JceOpenSSLPKCS8EncryptorBuilder
{
    public static final String AES_128_CBC = NISTObjectIdentifiers.id_aes128_CBC.getId();
    public static final String AES_192_CBC = NISTObjectIdentifiers.id_aes192_CBC.getId();
    public static final String AES_256_CBC = NISTObjectIdentifiers.id_aes256_CBC.getId();

    public static final String DES3_CBC = PKCSObjectIdentifiers.des_EDE3_CBC.getId();

    public static final String PBE_SHA1_RC4_128 = PKCSObjectIdentifiers.pbeWithSHAAnd128BitRC4.getId();
    public static final String PBE_SHA1_RC4_40 = PKCSObjectIdentifiers.pbeWithSHAAnd40BitRC4.getId();
    public static final String PBE_SHA1_3DES = PKCSObjectIdentifiers.pbeWithSHAAnd3_KeyTripleDES_CBC.getId();
    public static final String PBE_SHA1_2DES = PKCSObjectIdentifiers.pbeWithSHAAnd2_KeyTripleDES_CBC.getId();
    public static final String PBE_SHA1_RC2_128 = PKCSObjectIdentifiers.pbeWithSHAAnd128BitRC2_CBC.getId();
    public static final String PBE_SHA1_RC2_40 = PKCSObjectIdentifiers.pbeWithSHAAnd40BitRC2_CBC.getId();

    private JcaJceHelper helper = new DefaultJcaJceHelper();

    private AlgorithmParameters params;
    private ASN1ObjectIdentifier algOID;
    byte[] salt;
    int iterationCount;
    private Cipher cipher;
    private SecureRandom random;
    private AlgorithmParameterGenerator paramGen;
    private char[] password;

    private SecretKey key;

    public JceOpenSSLPKCS8EncryptorBuilder(ASN1ObjectIdentifier algorithm)
    {
        algOID = algorithm;

        this.iterationCount = 2048;
    }

    public JceOpenSSLPKCS8EncryptorBuilder setRandom(SecureRandom random)
    {
        this.random = random;

        return this;
    }

    public JceOpenSSLPKCS8EncryptorBuilder setPasssword(char[] password)
    {
        this.password = password;

        return this;
    }

    public JceOpenSSLPKCS8EncryptorBuilder setIterationCount(int iterationCount)
    {
        this.iterationCount = iterationCount;

        return this;
    }

    public JceOpenSSLPKCS8EncryptorBuilder setProvider(String providerName)
    {
        helper = new NamedJcaJceHelper(providerName);

        return this;
    }

    public JceOpenSSLPKCS8EncryptorBuilder setProvider(Provider provider)
    {
        helper = new ProviderJcaJceHelper(provider);

        return this;
    }

    public OutputEncryptor build()
        throws OperatorCreationException
    {
        final AlgorithmIdentifier algID;

        salt = new byte[20];

        if (random == null)
        {
            random = new SecureRandom();
        }

        random.nextBytes(salt);

        try
        {
            this.cipher = helper.createCipher(algOID.getId());

            if (PEMUtilities.isPKCS5Scheme2(algOID))
            {
                this.paramGen = helper.createAlgorithmParameterGenerator(algOID.getId());
            }
        }
        catch (GeneralSecurityException e)
        {
            throw new OperatorCreationException(algOID + " not available: " + e.getMessage(), e);
        }

        if (PEMUtilities.isPKCS5Scheme2(algOID))
        {
            params = paramGen.generateParameters();

            try
            {
                KeyDerivationFunc scheme = new KeyDerivationFunc(algOID, ASN1Primitive.fromByteArray(params.getEncoded()));
                KeyDerivationFunc func = new KeyDerivationFunc(PKCSObjectIdentifiers.id_PBKDF2, new PBKDF2Params(salt, iterationCount));

                ASN1EncodableVector v = new ASN1EncodableVector();

                v.add(func);
                v.add(scheme);

                algID = new AlgorithmIdentifier(PKCSObjectIdentifiers.id_PBES2, PBES2Parameters.getInstance(new DERSequence(v)));
            }
            catch (IOException e)
            {
                throw new OperatorCreationException(e.getMessage(), e);
            }

            try
            {
                key = PEMUtilities.generateSecretKeyForPKCS5Scheme2(helper, algOID.getId(), password, salt, iterationCount);

                cipher.init(Cipher.ENCRYPT_MODE, key, params);
            }
            catch (GeneralSecurityException e)
            {
                throw new OperatorCreationException(e.getMessage(), e);
            }
        }
        else if (PEMUtilities.isPKCS12(algOID))
        {
            ASN1EncodableVector v = new ASN1EncodableVector();

            v.add(new DEROctetString(salt));
            v.add(new ASN1Integer(iterationCount));

            algID = new AlgorithmIdentifier(algOID, PKCS12PBEParams.getInstance(new DERSequence(v)));

            try
            {
                cipher.init(Cipher.ENCRYPT_MODE, new PKCS12KeyWithParameters(password, salt, iterationCount));
            }
            catch (GeneralSecurityException e)
            {
                throw new OperatorCreationException(e.getMessage(), e);
            }
        }
        else
        {
            throw new OperatorCreationException("unknown algorithm: " + algOID, null);
        }

        return new OutputEncryptor()
        {
            public AlgorithmIdentifier getAlgorithmIdentifier()
            {
                return algID;
            }

            public OutputStream getOutputStream(OutputStream encOut)
            {
                return new CipherOutputStream(encOut, cipher);
            }

            public GenericKey getKey()
            {
                return new JceGenericKey(algID, key);
            }
        };
    }
}