102 lines
3.4 KiB
C#
102 lines
3.4 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.IdentityModel.Tokens
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{
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using System.Globalization;
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using System.Security.Cryptography;
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using System.Xml;
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public class RsaKeyIdentifierClause : SecurityKeyIdentifierClause
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{
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static string clauseType = XmlSignatureStrings.Namespace + XmlSignatureStrings.RsaKeyValue;
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readonly RSA rsa;
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readonly RSAParameters rsaParameters;
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RsaSecurityKey rsaSecurityKey;
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public RsaKeyIdentifierClause(RSA rsa)
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: base(clauseType)
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{
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if (rsa == null)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("rsa");
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this.rsa = rsa;
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this.rsaParameters = rsa.ExportParameters(false);
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}
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public override bool CanCreateKey
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{
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get { return true; }
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}
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public RSA Rsa
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{
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get { return this.rsa; }
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}
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public override SecurityKey CreateKey()
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{
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if (this.rsaSecurityKey == null)
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{
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this.rsaSecurityKey = new RsaSecurityKey(this.rsa);
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}
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return this.rsaSecurityKey;
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}
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public byte[] GetExponent()
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{
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return SecurityUtils.CloneBuffer(this.rsaParameters.Exponent);
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}
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public byte[] GetModulus()
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{
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return SecurityUtils.CloneBuffer(this.rsaParameters.Modulus);
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}
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public override bool Matches(SecurityKeyIdentifierClause keyIdentifierClause)
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{
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RsaKeyIdentifierClause that = keyIdentifierClause as RsaKeyIdentifierClause;
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// PreSharp Bug: Parameter 'that' to this public method must be validated: A null-dereference can occur here.
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#pragma warning suppress 56506
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return ReferenceEquals(this, that) || (that != null && that.Matches(this.rsa));
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}
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public bool Matches(RSA rsa)
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{
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if (rsa == null)
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return false;
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RSAParameters rsaParameters = rsa.ExportParameters(false);
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return SecurityUtils.MatchesBuffer(this.rsaParameters.Modulus, rsaParameters.Modulus) &&
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SecurityUtils.MatchesBuffer(this.rsaParameters.Exponent, rsaParameters.Exponent);
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}
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public override string ToString()
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{
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return string.Format(CultureInfo.InvariantCulture, "RsaKeyIdentifierClause(Modulus = {0}, Exponent = {1})",
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Convert.ToBase64String(this.rsaParameters.Modulus),
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Convert.ToBase64String(this.rsaParameters.Exponent));
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}
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public void WriteExponentAsBase64(XmlWriter writer)
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{
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if (writer == null)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
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}
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writer.WriteBase64(this.rsaParameters.Exponent, 0, this.rsaParameters.Exponent.Length);
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}
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public void WriteModulusAsBase64(XmlWriter writer)
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{
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if (writer == null)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("writer");
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}
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writer.WriteBase64(this.rsaParameters.Modulus, 0, this.rsaParameters.Modulus.Length);
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}
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}
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}
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