Re: how to read PKCS#8 file

I haven't tested this with Bouncy Castle, but you might try instantiating a KeyFactory for "DiffieHellman", instead of "DH".

::Ari
  ----- Original Message ----- 
  From: Kim Yuna 
  To: xml-encryption@w3.org 
  Sent: Sunday, December 14, 2003 11:20 AM
  Subject: how to read PKCS#8 file


  Dear all,

  I tried to test Diffie-Hellman algorithm using 01-phaos-xmlenc-3.
  First, i need to read dh-priv-key.der, but i cannot.

  My program is very simple like this.
  -------------------------------------------
  private static byte[] getRawKey(String strFile) throws Exception
  {
  File keyfile = new File(strFile);
  DataInputStream in = new DataInputStream(new FileInputStream(keyfile));
  byte[] rawkey = new byte[(int)keyfile.length()];
  in.readFully(rawkey);
  in.close();
  return rawkey;
  }
  public static void main(String[] args) throws Exception 
  {
  Security.addProvider(new BouncyCastleProvider()); 
  byte[] buffer = getRawKey("dh-priv-key.der");

  KeyFactory kf = KeyFactory.getInstance("DH");
  PKCS8EncodedKeySpec keysp = new PKCS8EncodedKeySpec (buffer);
  System.out.println(keysp.toString());
  try{
  PrivateKey pk = kf.generatePrivate(keysp);
  }
  catch(Exception e)
  {
  e.printStackTrace();
  }
  }
  ---------------------------------

  i get an error,

  java.security.spec.InvalidKeySpecException: java.lang.RuntimeException: algorithm identifier in key not recognised at org.bouncycastle.jce.provider.JDKKeyFactory$DH.engineGeneratePrivate(JDKKeyFactory.java:331)
  at java.security.KeyFactory.generatePrivate(KeyFactory.java:197)
  at Test.CertificateTest.main(CertificateTest.java:60)

  Please, help me.
  Thank you in advance.




  -------------------------------------------
  Yuna Kim CSE, HPC lab in POSTECH
  phone : +82-054-279-2915
  cellp : 016-324-7963
  -------------------------------------------