X509IssuerSerialKeyIdentifierClause.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / IdentityModel / System / IdentityModel / Tokens / X509IssuerSerialKeyIdentifierClause.cs / 1305376 / X509IssuerSerialKeyIdentifierClause.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.IdentityModel.Tokens 
{
    using System.Diagnostics; 
    using System.Globalization; 
    using System.Security.Cryptography;
    using System.Security.Cryptography.X509Certificates; 

    public class X509IssuerSerialKeyIdentifierClause : SecurityKeyIdentifierClause
    {
        readonly string issuerName; 
        readonly string issuerSerialNumber;
 
        public X509IssuerSerialKeyIdentifierClause(string issuerName, string issuerSerialNumber) 
            : base(null)
        { 
            if (String.IsNullOrEmpty(issuerName))
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("issuerName");
            if (String.IsNullOrEmpty(issuerSerialNumber))
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("issuerSerialNumber"); 

            this.issuerName = issuerName; 
            this.issuerSerialNumber = issuerSerialNumber; 
        }
 
        public X509IssuerSerialKeyIdentifierClause(X509Certificate2 certificate)
            : base(null)
        {
            if (certificate == null) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("certificate");
 
            this.issuerName = certificate.Issuer; 
            this.issuerSerialNumber = Asn1IntegerConverter.Asn1IntegerToDecimalString(certificate.GetSerialNumber());
        } 

        public string IssuerName
        {
            get { return this.issuerName; } 
        }
 
        public string IssuerSerialNumber 
        {
            get { return this.issuerSerialNumber; } 
        }

        public override bool Matches(SecurityKeyIdentifierClause keyIdentifierClause)
        { 
            X509IssuerSerialKeyIdentifierClause that = keyIdentifierClause as X509IssuerSerialKeyIdentifierClause;
 
            // PreSharp Bug: Parameter 'that' to this public method must be validated: A null-dereference can occur here. 
#pragma warning suppress 56506
            return ReferenceEquals(this, that) || (that != null && that.Matches(this.issuerName, this.issuerSerialNumber)); 
        }

        public bool Matches(X509Certificate2 certificate)
        { 
            if (certificate == null)
                return false; 
 
            return Matches(certificate.Issuer, Asn1IntegerConverter.Asn1IntegerToDecimalString(certificate.GetSerialNumber()));
        } 

        public bool Matches(string issuerName, string issuerSerialNumber)
        {
            if (issuerName == null) 
            {
                return false; 
            } 

            // If serial numbers dont match, we can avoid the potentially expensive issuer name comparison 
            if (this.issuerSerialNumber != issuerSerialNumber)
            {
                return false;
            } 

            // Serial numbers match. Do a string comparison of issuer names 
            if (this.issuerName == issuerName) 
            {
                return true; 
            }

            // String equality comparison for issuer names failed
            // Do a byte-level comparison of the X500 distinguished names corresponding to the issuer names. 
            // X500DistinguishedName constructor can throw for malformed inputs
            bool x500IssuerNameMatch = false; 
            try 
            {
                if (CryptoHelper.IsEqual(new X500DistinguishedName(this.issuerName).RawData, 
                                         new X500DistinguishedName(issuerName).RawData))
                {
                    x500IssuerNameMatch = true;
                } 
            }
            catch (CryptographicException e) 
            { 
                // Absorb and log exception. Fallthrough and return false from method.
                if (DiagnosticUtility.ShouldTraceWarning) 
                {
                    DiagnosticUtility.ExceptionUtility.TraceHandledException(e, TraceEventType.Warning);
                }
            } 

            return x500IssuerNameMatch; 
        } 

        public override string ToString() 
        {
            return string.Format(CultureInfo.InvariantCulture, "X509IssuerSerialKeyIdentifierClause(Issuer = '{0}', Serial = '{1}')",
                this.IssuerName, this.IssuerSerialNumber);
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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