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409
iTechSharp/srcbc/x509/X509Crl.cs
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409
iTechSharp/srcbc/x509/X509Crl.cs
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using System;
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using System.Collections;
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using System.Text;
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using Org.BouncyCastle.Asn1;
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using Org.BouncyCastle.Asn1.Utilities;
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using Org.BouncyCastle.Asn1.X509;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Math;
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using Org.BouncyCastle.Security;
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using Org.BouncyCastle.Security.Certificates;
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using Org.BouncyCastle.Utilities;
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using Org.BouncyCastle.Utilities.Collections;
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using Org.BouncyCastle.Utilities.Date;
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using Org.BouncyCastle.Utilities.Encoders;
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using Org.BouncyCastle.X509.Extension;
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namespace Org.BouncyCastle.X509
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{
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/**
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* The following extensions are listed in RFC 2459 as relevant to CRLs
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*
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* Authority Key Identifier
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* Issuer Alternative Name
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* CRL Number
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* Delta CRL Indicator (critical)
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* Issuing Distribution Point (critical)
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*/
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public class X509Crl
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: X509ExtensionBase
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// TODO Add interface Crl?
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{
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private readonly CertificateList c;
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private readonly string sigAlgName;
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private readonly byte[] sigAlgParams;
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private readonly bool isIndirect;
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public X509Crl(
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CertificateList c)
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{
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this.c = c;
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try
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{
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this.sigAlgName = X509SignatureUtilities.GetSignatureName(c.SignatureAlgorithm);
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if (c.SignatureAlgorithm.Parameters != null)
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{
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this.sigAlgParams = ((Asn1Encodable)c.SignatureAlgorithm.Parameters).GetDerEncoded();
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}
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else
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{
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this.sigAlgParams = null;
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}
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this.isIndirect = IsIndirectCrl;
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}
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catch (Exception e)
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{
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throw new CrlException("CRL contents invalid: " + e);
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}
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}
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protected override X509Extensions GetX509Extensions()
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{
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return Version == 2
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? c.TbsCertList.Extensions
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: null;
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}
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public virtual byte[] GetEncoded()
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{
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try
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{
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return c.GetDerEncoded();
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}
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catch (Exception e)
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{
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throw new CrlException(e.ToString());
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}
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}
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public virtual void Verify(
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AsymmetricKeyParameter publicKey)
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{
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if (!c.SignatureAlgorithm.Equals(c.TbsCertList.Signature))
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{
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throw new CrlException("Signature algorithm on CertificateList does not match TbsCertList.");
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}
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ISigner sig = SignerUtilities.GetSigner(SigAlgName);
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sig.Init(false, publicKey);
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byte[] encoded = this.GetTbsCertList();
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sig.BlockUpdate(encoded, 0, encoded.Length);
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if (!sig.VerifySignature(this.GetSignature()))
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{
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throw new SignatureException("CRL does not verify with supplied public key.");
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}
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}
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public virtual int Version
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{
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get { return c.Version; }
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}
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public virtual X509Name IssuerDN
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{
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get { return c.Issuer; }
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}
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public virtual DateTime ThisUpdate
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{
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get { return c.ThisUpdate.ToDateTime(); }
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}
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public virtual DateTimeObject NextUpdate
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{
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get
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{
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return c.NextUpdate == null
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? null
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: new DateTimeObject(c.NextUpdate.ToDateTime());
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}
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}
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private ISet LoadCrlEntries()
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{
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ISet entrySet = new HashSet();
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IEnumerable certs = c.GetRevokedCertificateEnumeration();
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X509Name previousCertificateIssuer = IssuerDN;
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foreach (CrlEntry entry in certs)
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{
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X509CrlEntry crlEntry = new X509CrlEntry(entry, isIndirect, previousCertificateIssuer);
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entrySet.Add(crlEntry);
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previousCertificateIssuer = crlEntry.GetCertificateIssuer();
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}
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return entrySet;
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}
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public virtual X509CrlEntry GetRevokedCertificate(
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BigInteger serialNumber)
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{
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IEnumerable certs = c.GetRevokedCertificateEnumeration();
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X509Name previousCertificateIssuer = IssuerDN;
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foreach (CrlEntry entry in certs)
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{
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X509CrlEntry crlEntry = new X509CrlEntry(entry, isIndirect, previousCertificateIssuer);
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if (serialNumber.Equals(entry.UserCertificate.Value))
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{
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return crlEntry;
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}
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previousCertificateIssuer = crlEntry.GetCertificateIssuer();
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}
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return null;
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}
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public virtual ISet GetRevokedCertificates()
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{
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ISet entrySet = LoadCrlEntries();
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if (entrySet.Count > 0)
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{
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return entrySet; // TODO? Collections.unmodifiableSet(entrySet);
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}
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return null;
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}
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public virtual byte[] GetTbsCertList()
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{
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try
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{
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return c.TbsCertList.GetDerEncoded();
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}
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catch (Exception e)
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{
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throw new CrlException(e.ToString());
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}
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}
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public virtual byte[] GetSignature()
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{
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return c.Signature.GetBytes();
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}
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public virtual string SigAlgName
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{
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get { return sigAlgName; }
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}
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public virtual string SigAlgOid
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{
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get { return c.SignatureAlgorithm.ObjectID.Id; }
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}
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public virtual byte[] GetSigAlgParams()
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{
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return Arrays.Clone(sigAlgParams);
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}
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public override bool Equals(
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object obj)
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{
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if (obj == this)
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return true;
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X509Crl other = obj as X509Crl;
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if (other == null)
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return false;
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return c.Equals(other.c);
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// NB: May prefer this implementation of Equals if more than one certificate implementation in play
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//return Arrays.AreEqual(this.GetEncoded(), other.GetEncoded());
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}
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public override int GetHashCode()
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{
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return c.GetHashCode();
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}
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/**
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* Returns a string representation of this CRL.
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*
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* @return a string representation of this CRL.
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*/
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public override string ToString()
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{
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StringBuilder buf = new StringBuilder();
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string nl = Platform.NewLine;
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buf.Append(" Version: ").Append(this.Version).Append(nl);
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buf.Append(" IssuerDN: ").Append(this.IssuerDN).Append(nl);
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buf.Append(" This update: ").Append(this.ThisUpdate).Append(nl);
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buf.Append(" Next update: ").Append(this.NextUpdate).Append(nl);
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buf.Append(" Signature Algorithm: ").Append(this.SigAlgName).Append(nl);
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byte[] sig = this.GetSignature();
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buf.Append(" Signature: ").Append(
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Encoding.ASCII.GetString(Hex.Encode(sig, 0, 20))).Append(nl);
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for (int i = 20; i < sig.Length; i += 20)
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{
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if (i < sig.Length - 20)
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{
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buf.Append(" ").Append(
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Encoding.ASCII.GetString(Hex.Encode(sig, i, 20))).Append(nl);
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}
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else
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{
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buf.Append(" ").Append(
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Encoding.ASCII.GetString(Hex.Encode(sig, i, sig.Length - i))).Append(nl);
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}
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}
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X509Extensions extensions = c.TbsCertList.Extensions;
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if (extensions != null)
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{
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IEnumerator e = extensions.ExtensionOids.GetEnumerator();
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if (e.MoveNext())
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{
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buf.Append(" Extensions: ").Append(nl);
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}
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do
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{
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DerObjectIdentifier oid = (DerObjectIdentifier) e.Current;
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X509Extension ext = extensions.GetExtension(oid);
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if (ext.Value != null)
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{
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Asn1Object asn1Value = X509ExtensionUtilities.FromExtensionValue(ext.Value);
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buf.Append(" critical(").Append(ext.IsCritical).Append(") ");
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try
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{
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if (oid.Equals(X509Extensions.CrlNumber))
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{
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buf.Append(new CrlNumber(DerInteger.GetInstance(asn1Value).PositiveValue)).Append(nl);
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}
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else if (oid.Equals(X509Extensions.DeltaCrlIndicator))
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{
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buf.Append(
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"Base CRL: "
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+ new CrlNumber(DerInteger.GetInstance(
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asn1Value).PositiveValue))
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.Append(nl);
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}
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else if (oid.Equals(X509Extensions.IssuingDistributionPoint))
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{
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buf.Append(IssuingDistributionPoint.GetInstance((Asn1Sequence) asn1Value)).Append(nl);
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}
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else if (oid.Equals(X509Extensions.CrlDistributionPoints))
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{
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buf.Append(CrlDistPoint.GetInstance((Asn1Sequence) asn1Value)).Append(nl);
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}
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else if (oid.Equals(X509Extensions.FreshestCrl))
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{
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buf.Append(CrlDistPoint.GetInstance((Asn1Sequence) asn1Value)).Append(nl);
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}
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else
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{
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buf.Append(oid.Id);
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buf.Append(" value = ").Append(
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Asn1Dump.DumpAsString(asn1Value))
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.Append(nl);
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}
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}
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catch (Exception)
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{
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buf.Append(oid.Id);
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buf.Append(" value = ").Append("*****").Append(nl);
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}
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}
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else
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{
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buf.Append(nl);
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}
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}
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while (e.MoveNext());
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}
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ISet certSet = GetRevokedCertificates();
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if (certSet != null)
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{
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foreach (X509CrlEntry entry in certSet)
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{
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buf.Append(entry);
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buf.Append(nl);
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}
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}
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return buf.ToString();
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}
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/**
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* Checks whether the given certificate is on this CRL.
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*
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* @param cert the certificate to check for.
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* @return true if the given certificate is on this CRL,
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* false otherwise.
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*/
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// public bool IsRevoked(
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// Certificate cert)
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// {
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// if (!cert.getType().Equals("X.509"))
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// {
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// throw new RuntimeException("X.509 CRL used with non X.509 Cert");
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// }
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public virtual bool IsRevoked(
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X509Certificate cert)
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{
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CrlEntry[] certs = c.GetRevokedCertificates();
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if (certs != null)
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{
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// BigInteger serial = ((X509Certificate)cert).SerialNumber;
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BigInteger serial = cert.SerialNumber;
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for (int i = 0; i < certs.Length; i++)
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{
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if (certs[i].UserCertificate.Value.Equals(serial))
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{
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return true;
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}
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}
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}
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return false;
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}
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protected virtual bool IsIndirectCrl
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{
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get
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{
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Asn1OctetString idp = GetExtensionValue(X509Extensions.IssuingDistributionPoint);
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bool isIndirect = false;
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try
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{
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if (idp != null)
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{
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isIndirect = IssuingDistributionPoint.GetInstance(
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X509ExtensionUtilities.FromExtensionValue(idp)).IsIndirectCrl;
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}
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}
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catch (Exception e)
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{
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// TODO
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// throw new ExtCrlException("Exception reading IssuingDistributionPoint", e);
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throw new CrlException("Exception reading IssuingDistributionPoint" + e);
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}
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return isIndirect;
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}
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}
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}
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}
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