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using System.Collections.Generic;
using Org.BouncyCastle.X509;
namespace Org.BouncyCastle.Pkix
{
public abstract class PkixCertPathChecker
{
protected PkixCertPathChecker()
{
}
/**
* Initializes the internal state of this <code>PKIXCertPathChecker</code>.
* <p>
* The <code>forward</code> flag specifies the order that certificates
* will be passed to the {@link #check check} method (forward or reverse). A
* <code>PKIXCertPathChecker</code> <b>must</b> support reverse checking
* and <b>may</b> support forward checking.
* </p>
*
* @param forward
* the order that certificates are presented to the
* <code>check</code> method. If <code>true</code>,
* certificates are presented from target to most-trusted CA
* (forward); if <code>false</code>, from most-trusted CA to
* target (reverse).
* @exception CertPathValidatorException
* if this <code>PKIXCertPathChecker</code> is unable to
* check certificates in the specified order; it should never
* be thrown if the forward flag is false since reverse
* checking must be supported
*/
public abstract void Init(bool forward);
/**
* Indicates if forward checking is supported. Forward checking refers to
* the ability of the <code>PKIXCertPathChecker</code> to perform its
* checks when certificates are presented to the <code>check</code> method
* in the forward direction (from target to most-trusted CA).
*
* @return <code>true</code> if forward checking is supported,
* <code>false</code> otherwise
*/
public abstract bool IsForwardCheckingSupported();
/**
* Returns an immutable <code>Set</code> of X.509 certificate extensions
* that this <code>PKIXCertPathChecker</code> supports (i.e. recognizes,
* is able to process), or <code>null</code> if no extensions are
* supported.
* <p>
* Each element of the set is a <code>String</code> representing the
* Object Identifier (OID) of the X.509 extension that is supported. The OID
* is represented by a set of nonnegative integers separated by periods.
* </p><p>
* All X.509 certificate extensions that a <code>PKIXCertPathChecker</code>
* might possibly be able to process should be included in the set.
* </p>
*
* @return an immutable <code>Set</code> of X.509 extension OIDs (in
* <code>String</code> format) supported by this
* <code>PKIXCertPathChecker</code>, or <code>null</code> if no
* extensions are supported
*/
public abstract ISet<string> GetSupportedExtensions();
/**
* Performs the check(s) on the specified certificate using its internal
* state and removes any critical extensions that it processes from the
* specified collection of OID strings that represent the unresolved
* critical extensions. The certificates are presented in the order
* specified by the <code>init</code> method.
*
* @param cert
* the <code>Certificate</code> to be checked
* @param unresolvedCritExts
* a <code>Collection</code> of OID strings representing the
* current set of unresolved critical extensions
* @exception CertPathValidatorException
* if the specified certificate does not pass the check
*/
public abstract void Check(X509Certificate cert, ISet<string> unresolvedCritExts);
/**
* Returns a clone of this object. Calls the <code>Object.clone()</code>
* method. All subclasses which maintain state must support and override
* this method, if necessary.
*
* @return a copy of this <code>PKIXCertPathChecker</code>
*/
public virtual object Clone()
{
// TODO Check this
return base.MemberwiseClone();
}
}
}
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