Secret (simmetric) keys can be extracted from the token if the token allows extractions and/or the key is marked as extractable.
This is a snippet to extract the value of a DES secret key:
// Searchs for an DES private key object
CryptokiCollection template = new CryptokiCollection();
template.Add(new ObjectAttribute(ObjectAttribute.CKA_CLASS, CryptokiObject.CKO_SECRET_KEY));
template.Add(new ObjectAttribute(ObjectAttribute.CKA_KEY_TYPE, Key.CKK_DES)); // this may be: Key.CKK_DES2, Key.CKK_DES3, Key.CKK_AES, etc.
// Launches the search specifying the template just created
CryptokiCollection objects = session.Objects.Find(template, 1);
if(objects.count == 0)
{
// KEY NOT FOUND
return false;
}
// takes the first object as key
SecretKey secretKey = (SecretKey)objects[0];
// check if extractable
if(!secretKey.Extractable)
{
// NOT EXTRACTABLE
return false;
}
// Extracts the key value
byte[] keyValue= secretKey.KeyValue;