iaik.pkcs.pkcs11.objects.HardwareFeature Maven / Gradle / Ivy
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package iaik.pkcs.pkcs11.objects;
import iaik.pkcs.pkcs11.Session;
import iaik.pkcs.pkcs11.TokenException;
import iaik.pkcs.pkcs11.Util;
import iaik.pkcs.pkcs11.wrapper.Constants;
import iaik.pkcs.pkcs11.wrapper.PKCS11Constants;
import iaik.pkcs.pkcs11.wrapper.PKCS11Exception;
/**
* This is the base class for hardware feature classes. Objects of this class
* represent hardware features as specified by PKCS#11 v2.20.
* A hardware feature is of a specific type: MONOTONIC_COUNTER, CLOCK,
* CKH_USER_INTERFAC or VENDOR_DEFINED.
* If an application needs to use vendor-defined hardware
* features, it must set a VendorDefinedHardwareFeatureBuilder using the
* setVendorDefinedHardwareFeatureBuilder method.
*
* @author Karl Scheibelhofer
* @version 1.0
* @invariants (hardwareFeatureType_ <> null)
*/
public class HardwareFeature extends Object {
/**
* This interface defines the available hardware feature types as defined by
* PKCS#11 2.20: MONOTONIC_COUNTER, CLOCK, CKH_USER_INTERFAC or
* VENDOR_DEFINED.
*
* @author Karl Scheibelhofer
* @version 1.0
* @invariants
*/
public interface FeatureType {
/**
* The identifier for a monotonic counter.
*/
public static final Long MONOTONIC_COUNTER = new Long(
PKCS11Constants.CKH_MONOTONIC_COUNTER);
/**
* The identifier for a clock.
*/
public static final Long CLOCK = new Long(PKCS11Constants.CKH_CLOCK);
/**
* The identifier for a user interface.
*/
public static final Long USER_INTERFACE
= new Long(PKCS11Constants.CKH_USER_INTERFACE);
/**
* The identifier for a VENDOR_DEFINED hardware feature. Any Long object
* with a value bigger than this one is also a valid vendor-defined
* hardware feature type identifier.
*/
public static final Long VENDOR_DEFINED
= new Long(PKCS11Constants.CKH_VENDOR_DEFINED);
}
/**
* If an application uses vendor defined hardware features, it must
* implement this interface and install such an object handler using
* setVendorDefinedHardwareFeatureBuilder.
*
* @author Karl Scheibelhofer
* @version 1.0
* @invariants
*/
public interface VendorDefinedHardwareFeatureBuilder {
/**
* This method should instantiate an Object of this class or of any
* sub-class. It can use the given handles and PKCS#11 module to
* retrieve attributes of the PKCS#11 object from the token.
*
* @param session
* The session to use for reading attributes. This session must
* have the appropriate rights; i.e. it must be a user-session,
* if it is a private object.
* @param objectHandle
* The object handle as given from the PKCS#111 module.
* @return The object representing the PKCS#11 object.
* The returned object can be casted to the
* according sub-class.
* @exception PKCS11Exception
* If getting the attributes failed.
* @preconditions (session <> null)
* @postconditions (result <> null)
*/
@SuppressWarnings("restriction")
public Object build(Session session, long objectHandle)
throws sun.security.pkcs11.wrapper.PKCS11Exception;
}
/**
* The currently set vendor defined hardware feature builder, or null.
*/
protected static VendorDefinedHardwareFeatureBuilder
vendorHardwareFeatureBuilder_;
/**
* The type of this hardware feature. Its value is one of FeatureType, or
* one that has a bigger value than VENDOR_DEFINED.
*/
protected HardwareFeatureTypeAttribute hardwareFeatureType_;
/**
* The default constructor. An application use this constructor to
* instantiate a hardware feature that serves as a template. It may also be
* useful for working with vendor-defined hardware features.
*
* @preconditions
* @postconditions
*/
public HardwareFeature() {
super();
objectClass_.setLongValue(ObjectClass.HW_FEATURE);
}
/**
* Called by getInstance to create an instance of a PKCS#11 hardware
* feature.
*
* @param session
* The session to use for reading attributes. This session must
* have the appropriate rights; i.e. it must be a user-session, if
* it is a private object.
* @param objectHandle
* The object handle as given from the PKCS#111 module.
* @exception TokenException
* If getting the attributes failed.
* @preconditions (session <> null)
* @postconditions
*/
protected HardwareFeature(Session session, long objectHandle)
throws TokenException {
super(session, objectHandle);
objectClass_.setLongValue(ObjectClass.HW_FEATURE);
}
/**
* Get the given hardware feature type as string.
*
* @param hardwareFeatureType
* The hardware feature type to get as string.
* @return A string denoting the object hardware feature type; e.g. "Clock".
* @preconditions (hardwareFeatureType <> null)
* @postconditions (result <> null)
*/
public static String getHardwareFeatureTypeName(Long hardwareFeatureType) {
Util.requireNonNull("hardwareFeatureType", hardwareFeatureType);
String hardwareFeatureTypeName;
if (hardwareFeatureType.equals(FeatureType.MONOTONIC_COUNTER)) {
hardwareFeatureTypeName = "Monotonic Counter";
} else if (hardwareFeatureType.equals(FeatureType.CLOCK)) {
hardwareFeatureTypeName = "Clock";
} else if (hardwareFeatureType.equals(FeatureType.USER_INTERFACE)) {
hardwareFeatureTypeName = "User Interface";
} else if ((hardwareFeatureType.longValue()
& FeatureType.VENDOR_DEFINED.longValue()) != 0L) {
hardwareFeatureTypeName = "Vendor Defined";
} else {
hardwareFeatureTypeName = "";
}
return hardwareFeatureTypeName;
}
/**
* Called by sub-classes to create an instance of a PKCS#11 hardware
* feature. This method reads the hardware feature type attribute and calls
* the getInstance method of the according sub-class.
* If the hardware feature type is a vendor defined it uses the
* VendorDefinedHardwareFeatureBuilder set by the application. If no
* hardware feature could be constructed, this method returns null.
*
* @param session
* The session to use for reading attributes. This session must
* have the appropriate rights; i.e. it must be a user-session, if
* it is a private object.
* @param objectHandle
* The object handle as given from the PKCS#111 module.
* @return The object representing the PKCS#11 object.
* The returned object can be casted to the
* according sub-class.
* @exception TokenException
* If getting the attributes failed.
* @preconditions (session <> null)
* @postconditions (result <> null)
*/
public static Object getInstance(Session session, long objectHandle)
throws TokenException {
Util.requireNonNull("session", session);
HardwareFeatureTypeAttribute hardwareFeatureTypeAttribute
= new HardwareFeatureTypeAttribute();
getAttributeValue(session, objectHandle, hardwareFeatureTypeAttribute);
Long hardwareFeatureType = hardwareFeatureTypeAttribute.getLongValue();
Object newObject;
if (hardwareFeatureTypeAttribute.isPresent()
&& (hardwareFeatureType != null)) {
if (hardwareFeatureType.equals(FeatureType.MONOTONIC_COUNTER)) {
newObject = MonotonicCounter.getInstance(session, objectHandle);
} else if (hardwareFeatureType.equals(FeatureType.CLOCK)) {
newObject = Clock.getInstance(session, objectHandle);
} else if (hardwareFeatureType.equals(FeatureType.USER_INTERFACE)) {
// TODO: add user interface object
// newObject = UserInterface.getInstance(session, objectHandle);
newObject = getUnknownHardwareFeature(session, objectHandle);
} else if ((hardwareFeatureType.longValue()
& FeatureType.VENDOR_DEFINED.longValue()) != 0L) {
newObject = getUnknownHardwareFeature(session, objectHandle);
} else {
newObject = getUnknownHardwareFeature(session, objectHandle);
}
} else {
newObject = getUnknownHardwareFeature(session, objectHandle);
}
return newObject;
}
/**
* Try to create a hardware feature which has no or an unknown hardware
* feature type attribute.
* This implementation will try to use a vendor defined hardware feature
* builder, if such has been set.
* If this is impossible or fails, it will create just a simple
* {@link iaik.pkcs.pkcs11.objects.HardwareFeature HardwareFeature}.
*
* @param session
* The session to use.
* @param objectHandle
* The handle of the object
* @return A new Object.
* @throws TokenException
* If no object could be created.
* @preconditions (session <> null)
* @postconditions (result <> null)
*/
@SuppressWarnings("restriction")
protected static Object getUnknownHardwareFeature(Session session,
long objectHandle)
throws TokenException {
Util.requireNonNull("session", session);
Object newObject;
if (vendorHardwareFeatureBuilder_ != null) {
try {
newObject = vendorHardwareFeatureBuilder_.build(session,
objectHandle);
} catch (sun.security.pkcs11.wrapper.PKCS11Exception ex) {
// we can just treat it like some unknown type of hardware
// feature
newObject = new HardwareFeature(session, objectHandle);
}
} else {
// we can just treat it like some unknown type of hardware feature
newObject = new HardwareFeature(session, objectHandle);
}
return newObject;
}
/**
* Set a vendor-defined hardware feature builder that should be called to
* create an* instance of an vendor-defined PKCS#11 hardware feature; i.e.
* an instance of a vendor defined sub-class of this class.
*
* @param builder
* The vendor-defined hardware feature builder. Null to clear any
* previously installed vendor-defined builder.
* @preconditions
* @postconditions
*/
public static void setVendorDefinedHardwareFeatureBuilder(
VendorDefinedHardwareFeatureBuilder builder) {
vendorHardwareFeatureBuilder_ = builder;
}
/**
* Get the currently set vendor-defined hardware feature builder.
*
* @return The currently set vendor-defined hardware feature builder or null
* if none is set.
* @preconditions
* @postconditions
*/
public static VendorDefinedHardwareFeatureBuilder
getVendorDefinedHardwareFeatureBuilder() {
return vendorHardwareFeatureBuilder_;
}
/**
* Put all attributes of the given object into the attributes table of this
* object. This method is only static to be able to access invoke the
* implementation of this method for each class separately (see use in
* clone()).
*
* @param object
* The object to handle.
* @preconditions (object <> null)
* @postconditions
*/
protected static void putAttributesInTable(HardwareFeature object) {
Util.requireNonNull("object", object);
object.attributeTable_.put(Attribute.HW_FEATURE_TYPE,
object.hardwareFeatureType_);
}
/**
* Allocates the attribute objects for this class and adds them to the
* attribute table.
*
* @preconditions
* @postconditions
*/
@Override
protected void allocateAttributes() {
super.allocateAttributes();
hardwareFeatureType_ = new HardwareFeatureTypeAttribute();
putAttributesInTable(this);
}
/**
* Create a (deep) clone of this object.
*
* @return A clone of this object.
* @preconditions
* @postconditions (result <> null)
* and (result instanceof HardwareFeature)
* and (result.equals(this))
*/
@Override
public java.lang.Object clone() {
HardwareFeature clone = (HardwareFeature) super.clone();
clone.hardwareFeatureType_ = (HardwareFeatureTypeAttribute)
this.hardwareFeatureType_.clone();
// put all cloned attributes into the new table
putAttributesInTable(clone);
return clone;
}
/**
* Compares all member variables of this object with the other object.
* Returns only true, if all are equal in both objects.
*
* @param otherObject
* The other object to compare to.
* @return True, if other is an instance of this class and all member
* variables of both objects are equal. False, otherwise.
* @preconditions
* @postconditions
*/
@Override
public boolean equals(java.lang.Object otherObject) {
if (this == otherObject) {
return true;
}
if (!(otherObject instanceof HardwareFeature)) {
return false;
}
HardwareFeature other = (HardwareFeature) otherObject;
return super.equals(other)
&& this.hardwareFeatureType_.equals(other.hardwareFeatureType_);
}
/**
* Gets the hardware feature type attribute of the PKCS#11 key. Its value
* must be one of those defined in the FeatureType interface or one with an
* value bigger than FeatureType.VENDOR_DEFINED.
*
* @return The hardware feature type identifier.
* @preconditions
* @postconditions (result <> null)
*/
public LongAttribute getHardwareFeatureType() {
return hardwareFeatureType_;
}
/**
* The overriding of this method should ensure that the objects of this
* class work correctly in a hashtable.
*
* @return The hash code of this object.
* @preconditions
* @postconditions
*/
@Override
public int hashCode() {
return hardwareFeatureType_.hashCode();
}
/**
* This method returns a string representation of the current object. The
* output is only for debugging purposes and should not be used for other
* purposes.
*
* @return A string presentation of this object for debugging output.
* @preconditions
* @postconditions (result <> null)
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder(128);
buffer.append(super.toString());
buffer.append(Constants.NEWLINE_INDENT);
buffer.append("Hardware Feature Type: ");
if (hardwareFeatureType_ != null) {
buffer.append(hardwareFeatureType_.toString());
} else {
buffer.append("");
}
return buffer.toString();
}
}
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