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package org.spongycastle.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.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.InvalidKeyException;
import java.security.Provider;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.CipherOutputStream;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.nist.NISTObjectIdentifiers;
import org.spongycastle.asn1.pkcs.KeyDerivationFunc;
import org.spongycastle.asn1.pkcs.PBES2Parameters;
import org.spongycastle.asn1.pkcs.PBKDF2Params;
import org.spongycastle.asn1.pkcs.PKCS12PBEParams;
import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.spongycastle.asn1.x509.AlgorithmIdentifier;
import org.spongycastle.jcajce.DefaultJcaJceHelper;
import org.spongycastle.jcajce.JcaJceHelper;
import org.spongycastle.jcajce.NamedJcaJceHelper;
import org.spongycastle.jcajce.ProviderJcaJceHelper;
import org.spongycastle.operator.GenericKey;
import org.spongycastle.operator.OperatorCreationException;
import org.spongycastle.operator.OutputEncryptor;
import org.spongycastle.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 SecretKeyFactory secKeyFact;
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());
}
else
{
this.secKeyFact = helper.createSecretKeyFactory(algOID.getId());
}
}
catch (NoSuchAlgorithmException e)
{
throw new OperatorCreationException(algOID + " not available: " + e.getMessage(), e);
}
catch (NoSuchProviderException e)
{
throw new OperatorCreationException(algOID + " not available: " + e.getMessage(), e);
}
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);
}
key = PEMUtilities.generateSecretKeyForPKCS5Scheme2(algOID.getId(), password, salt, iterationCount);
try
{
cipher.init(Cipher.ENCRYPT_MODE, key, params);
}
catch (InvalidKeyException e)
{
throw new OperatorCreationException(e.getMessage(), e);
}
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
{
PBEKeySpec pbeSpec = new PBEKeySpec(password);
PBEParameterSpec defParams = new PBEParameterSpec(salt, iterationCount);
key = secKeyFact.generateSecret(pbeSpec);
cipher.init(Cipher.ENCRYPT_MODE, key, defParams);
}
catch (InvalidKeyException e)
{
throw new OperatorCreationException(e.getMessage(), e);
}
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);
}
};
}
}
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