[iaik-ssl]cu|| Retrieving Public Key from Smart Card

[Nick Karamer <nkaramer@yahoo.com>]

Hi all,

I am successful in generating Key pair on the smart
card through my application code. Infact i had to use
C_XXXX functions od wrapper class PKCS11 directly. Now
i want to do following

1- Retreive Public Key
2- Retrieve Private Key to send the handle of that for
signing.

I have written following code to find the Key

      long[] slotIDs_ = __pkcs11.C_GetSlotList(true);
      token_ = slotIDs_[0];
      session_ = __pkcs11.C_OpenSession(token_,
PKCS11Constants.CKF_SERIAL_SESSION |
PKCS11Constants.CKF_RW_SESSION, null, null);
      __pkcs11.C_Login(session_,
PKCS11Constants.CKU_USER, str_UserPIN.toCharArray());
      System.out.println("The Smart Card is Logged in
with New User");
      System.out.println("Going to get Public Key the
User --- " + str_UserPIN);
      // set the search template for the public key
      int i_KeyLength = 1024; // change it
      RSAPublicKey rsaPublicKeyTemplate = new
RSAPublicKey();
     
rsaPublicKeyTemplate.getId().setByteArrayValue(a_strKeyId.getBytes());
     
rsaPublicKeyTemplate.getModulusBits().setLongValue(new
Long(i_KeyLength));
     
rsaPublicKeyTemplate.getToken().setBooleanValue(Boolean.TRUE);
      byte [] publicKeyExponentBytes = {0x01 , 0x00,
0x01};
     
rsaPublicKeyTemplate.getPublicExponent().setByteArrayValue(publicKeyExponentBytes);
      Vector publikKeyAttributes =
rsaPublicKeyTemplate.getSetAttributes();
      CK_ATTRIBUTE [] publicKeyAttList = null;
      if (publikKeyAttributes!=null &&
publikKeyAttributes.size()> 0)
      {
        publicKeyAttList = new
CK_ATTRIBUTE[publikKeyAttributes.size()];
        for (int i_Index=0; i_Index <
publikKeyAttributes.size(); i_Index++)
        {
          publicKeyAttList[i_Index] =
(CK_ATTRIBUTE)publikKeyAttributes.get(i_Index);
        }
        System.out.println("Total Attributes are " +
publikKeyAttributes.size());
      }
      __pkcs11.C_FindObjectsInit(session_,
publicKeyAttList);
      long [] keysFound =
__pkcs11.C_FindObjects(session_, 100);
      __pkcs11.C_FindObjectsFinal(session_);
      System.out.println("Total Attributes are after
finding " + publicKeyAttList.length);
      System.out.println("Total Keys Found are " +
keysFound.length);


These were the attributes which i had set when i
created the key pair and it was created with success.
Now everything goes fine but the function
C_FindObjects returns 0 no of key handles. Also if i
get some key then how would i convert it to PublicKey
to be used in JCE. I have tried this code with
providing only KeyId attribute but the result remains
the same. Please help.

Thanks
Nick

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