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      1 package org.bouncycastle.jcajce.provider.asymmetric.util;
      2 
      3 import java.security.Key;
      4 import java.security.PrivateKey;
      5 import java.security.PublicKey;
      6 import java.security.spec.InvalidKeySpecException;
      7 import java.security.spec.KeySpec;
      8 import java.security.spec.PKCS8EncodedKeySpec;
      9 import java.security.spec.X509EncodedKeySpec;
     10 
     11 import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
     12 import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
     13 import org.bouncycastle.jcajce.provider.util.AsymmetricKeyInfoConverter;
     14 
     15 public abstract class BaseKeyFactorySpi
     16     extends java.security.KeyFactorySpi
     17     implements AsymmetricKeyInfoConverter
     18 {
     19     protected PrivateKey engineGeneratePrivate(
     20         KeySpec keySpec)
     21         throws InvalidKeySpecException
     22     {
     23         if (keySpec instanceof PKCS8EncodedKeySpec)
     24         {
     25             try
     26             {
     27                 return generatePrivate(PrivateKeyInfo.getInstance(((PKCS8EncodedKeySpec)keySpec).getEncoded()));
     28             }
     29             catch (Exception e)
     30             {
     31                 throw new InvalidKeySpecException("encoded key spec not recognized: " + e.getMessage());
     32             }
     33         }
     34         else
     35         {
     36             throw new InvalidKeySpecException("key spec not recognized");
     37         }
     38     }
     39 
     40     protected PublicKey engineGeneratePublic(
     41         KeySpec keySpec)
     42         throws InvalidKeySpecException
     43     {
     44         if (keySpec instanceof X509EncodedKeySpec)
     45         {
     46             try
     47             {
     48                 return generatePublic(SubjectPublicKeyInfo.getInstance(((X509EncodedKeySpec)keySpec).getEncoded()));
     49             }
     50             catch (Exception e)
     51             {
     52                 throw new InvalidKeySpecException("encoded key spec not recognized: " + e.getMessage());
     53             }
     54         }
     55         else
     56         {
     57             throw new InvalidKeySpecException("key spec not recognized");
     58         }
     59     }
     60 
     61     protected KeySpec engineGetKeySpec(
     62         Key key,
     63         Class spec)
     64         throws InvalidKeySpecException
     65     {
     66         if (spec.isAssignableFrom(PKCS8EncodedKeySpec.class) && key.getFormat().equals("PKCS#8"))
     67         {
     68             return new PKCS8EncodedKeySpec(key.getEncoded());
     69         }
     70         else if (spec.isAssignableFrom(X509EncodedKeySpec.class) && key.getFormat().equals("X.509"))
     71         {
     72             return new X509EncodedKeySpec(key.getEncoded());
     73         }
     74 
     75         throw new InvalidKeySpecException("not implemented yet " + key + " " + spec);
     76     }
     77 }
     78