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package org.spongycastle.jcajce.provider.symmetric;
import java.io.IOException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.InvalidParameterSpecException;
import java.security.spec.KeySpec;
import javax.crypto.SecretKey;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import org.spongycastle.asn1.ASN1Encoding;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.spongycastle.asn1.pkcs.PBKDF2Params;
import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.spongycastle.crypto.CipherParameters;
import org.spongycastle.jcajce.provider.config.ConfigurableProvider;
import org.spongycastle.jcajce.provider.symmetric.util.BCPBEKey;
import org.spongycastle.jcajce.provider.symmetric.util.BaseAlgorithmParameters;
import org.spongycastle.jcajce.provider.symmetric.util.BaseSecretKeyFactory;
import org.spongycastle.jcajce.provider.symmetric.util.PBE;
import org.spongycastle.jcajce.provider.util.AlgorithmProvider;
import org.spongycastle.jcajce.spec.PBKDF2KeySpec;
public class PBEPBKDF2
{
private PBEPBKDF2()
{
}
public static class AlgParams
extends BaseAlgorithmParameters
{
PBKDF2Params params;
protected byte[] engineGetEncoded()
{
try
{
return params.getEncoded(ASN1Encoding.DER);
}
catch (IOException e)
{
throw new RuntimeException("Oooops! " + e.toString());
}
}
protected byte[] engineGetEncoded(
String format)
{
if (this.isASN1FormatString(format))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == PBEParameterSpec.class)
{
return new PBEParameterSpec(params.getSalt(),
params.getIterationCount().intValue());
}
throw new InvalidParameterSpecException("unknown parameter spec passed to PBKDF2 PBE parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if (!(paramSpec instanceof PBEParameterSpec))
{
throw new InvalidParameterSpecException("PBEParameterSpec required to initialise a PBKDF2 PBE parameters algorithm parameters object");
}
PBEParameterSpec pbeSpec = (PBEParameterSpec)paramSpec;
this.params = new PBKDF2Params(pbeSpec.getSalt(),
pbeSpec.getIterationCount());
}
protected void engineInit(
byte[] params)
throws IOException
{
this.params = PBKDF2Params.getInstance(ASN1Primitive.fromByteArray(params));
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (this.isASN1FormatString(format))
{
engineInit(params);
return;
}
throw new IOException("Unknown parameters format in PBKDF2 parameters object");
}
protected String engineToString()
{
return "PBKDF2 Parameters";
}
}
public static class BasePBKDF2
extends BaseSecretKeyFactory
{
private int scheme;
public BasePBKDF2(String name, int scheme)
{
super(name, PKCSObjectIdentifiers.id_PBKDF2);
this.scheme = scheme;
}
protected SecretKey engineGenerateSecret(
KeySpec keySpec)
throws InvalidKeySpecException
{
if (keySpec instanceof PBEKeySpec)
{
PBEKeySpec pbeSpec = (PBEKeySpec)keySpec;
if (pbeSpec.getSalt() == null)
{
throw new InvalidKeySpecException("missing required salt");
}
if (pbeSpec.getIterationCount() <= 0)
{
throw new InvalidKeySpecException("positive iteration count required: "
+ pbeSpec.getIterationCount());
}
if (pbeSpec.getKeyLength() <= 0)
{
throw new InvalidKeySpecException("positive key length required: "
+ pbeSpec.getKeyLength());
}
if (pbeSpec.getPassword().length == 0)
{
throw new IllegalArgumentException("password empty");
}
if (pbeSpec instanceof PBKDF2KeySpec)
{
PBKDF2KeySpec spec = (PBKDF2KeySpec)pbeSpec;
int digest = getDigestCode(spec.getPrf().getAlgorithm());
int keySize = pbeSpec.getKeyLength();
int ivSize = -1; // JDK 1,2 and earlier does not understand simplified version.
CipherParameters param = PBE.Util.makePBEMacParameters(pbeSpec, scheme, digest, keySize);
return new BCPBEKey(this.algName, this.algOid, scheme, digest, keySize, ivSize, pbeSpec, param);
}
else
{
int digest = SHA1;
int keySize = pbeSpec.getKeyLength();
int ivSize = -1; // JDK 1,2 and earlier does not understand simplified version.
CipherParameters param = PBE.Util.makePBEMacParameters(pbeSpec, scheme, digest, keySize);
return new BCPBEKey(this.algName, this.algOid, scheme, digest, keySize, ivSize, pbeSpec, param);
}
}
throw new InvalidKeySpecException("Invalid KeySpec");
}
private int getDigestCode(ASN1ObjectIdentifier algorithm)
throws InvalidKeySpecException
{
if (algorithm.equals(CryptoProObjectIdentifiers.gostR3411Hmac))
{
return GOST3411;
}
else if (algorithm.equals(PKCSObjectIdentifiers.id_hmacWithSHA1))
{
return SHA1;
}
throw new InvalidKeySpecException("Invalid KeySpec: unknown PRF algorithm " + algorithm);
}
}
public static class PBKDF2withUTF8
extends BasePBKDF2
{
public PBKDF2withUTF8()
{
super("PBKDF2", PKCS5S2_UTF8);
}
}
public static class Mappings
extends AlgorithmProvider
{
private static final String PREFIX = PBEPBKDF2.class.getName();
public Mappings()
{
}
public void configure(ConfigurableProvider provider)
{
provider.addAlgorithm("AlgorithmParameters.PBKDF2", PREFIX + "$AlgParams");
provider.addAlgorithm("Alg.Alias.AlgorithmParameters." + PKCSObjectIdentifiers.id_PBKDF2, "PBKDF2");
provider.addAlgorithm("SecretKeyFactory.PBKDF2", PREFIX + "$PBKDF2withUTF8");
provider.addAlgorithm("Alg.Alias.SecretKeyFactory." + PKCSObjectIdentifiers.id_PBKDF2, "PBKDF2");
}
}
}
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