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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel.Tokens
{
// All subclasses are required to be thread-safe and immutable
// Self-resolving clauses such as RSA and X509 raw data should
// override CanCreateKey and return true, and implement
// CreateKey()
public abstract class SecurityKeyIdentifierClause
{
readonly string clauseType;
byte[] derivationNonce;
int derivationLength;
string id = null;
protected SecurityKeyIdentifierClause(string clauseType)
: this(clauseType, null, 0)
{
}
protected SecurityKeyIdentifierClause(string clauseType, byte[] nonce, int length)
{
this.clauseType = clauseType;
this.derivationNonce = nonce;
this.derivationLength = length;
}
public virtual bool CanCreateKey
{
get { return false; }
}
public string ClauseType
{
get { return this.clauseType; }
}
public string Id
{
get { return this.id; }
set { this.id = value; }
}
public virtual SecurityKey CreateKey()
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new NotSupportedException(SR.GetString(SR.KeyIdentifierClauseDoesNotSupportKeyCreation)));
}
public virtual bool Matches(SecurityKeyIdentifierClause keyIdentifierClause)
{
return ReferenceEquals(this, keyIdentifierClause);
}
public byte[] GetDerivationNonce()
{
return (this.derivationNonce != null) ? (byte[])this.derivationNonce.Clone() : null;
}
public int DerivationLength
{
get { return this.derivationLength; }
}
}
}
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