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using System;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* The TbsCertificate object.
* <pre>
* TbsCertificate ::= Sequence {
* version [ 0 ] Version DEFAULT v1(0),
* serialNumber CertificateSerialNumber,
* signature AlgorithmIdentifier,
* issuer Name,
* validity Validity,
* subject Name,
* subjectPublicKeyInfo SubjectPublicKeyInfo,
* issuerUniqueID [ 1 ] IMPLICIT UniqueIdentifier OPTIONAL,
* subjectUniqueID [ 2 ] IMPLICIT UniqueIdentifier OPTIONAL,
* extensions [ 3 ] Extensions OPTIONAL
* }
* </pre>
* <p>
* Note: issuerUniqueID and subjectUniqueID are both deprecated by the IETF. This class
* will parse them, but you really shouldn't be creating new ones.</p>
*/
public class TbsCertificateStructure
: Asn1Encodable
{
internal Asn1Sequence seq;
internal DerInteger version;
internal DerInteger serialNumber;
internal AlgorithmIdentifier signature;
internal X509Name issuer;
internal Time startDate, endDate;
internal X509Name subject;
internal SubjectPublicKeyInfo subjectPublicKeyInfo;
internal DerBitString issuerUniqueID;
internal DerBitString subjectUniqueID;
internal X509Extensions extensions;
public static TbsCertificateStructure GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is TbsCertificateStructure tbsCertificateStructure)
return tbsCertificateStructure;
return new TbsCertificateStructure(Asn1Sequence.GetInstance(obj));
}
public static TbsCertificateStructure GetInstance(Asn1TaggedObject obj, bool explicitly)
{
return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
}
private TbsCertificateStructure(Asn1Sequence seq)
{
int seqStart = 0;
this.seq = seq;
//
// some certificates don't include a version number - we assume v1
//
if (seq[0] is Asn1TaggedObject taggedObject)
{
version = DerInteger.GetInstance(taggedObject, true);
}
else
{
seqStart = -1; // field 0 is missing!
version = DerInteger.Zero;
}
bool isV1 = false;
bool isV2 = false;
if (version.HasValue(0))
{
isV1 = true;
}
else if (version.HasValue(1))
{
isV2 = true;
}
else if (!version.HasValue(2))
{
throw new ArgumentException("version number not recognised");
}
serialNumber = DerInteger.GetInstance(seq[seqStart + 1]);
signature = AlgorithmIdentifier.GetInstance(seq[seqStart + 2]);
issuer = X509Name.GetInstance(seq[seqStart + 3]);
//
// before and after dates
//
Asn1Sequence dates = (Asn1Sequence)seq[seqStart + 4];
startDate = Time.GetInstance(dates[0]);
endDate = Time.GetInstance(dates[1]);
subject = X509Name.GetInstance(seq[seqStart + 5]);
//
// public key info.
//
subjectPublicKeyInfo = SubjectPublicKeyInfo.GetInstance(seq[seqStart + 6]);
int extras = seq.Count - (seqStart + 6) - 1;
if (extras != 0 && isV1)
throw new ArgumentException("version 1 certificate contains extra data");
while (extras > 0)
{
Asn1TaggedObject extra = Asn1TaggedObject.GetInstance(seq[seqStart + 6 + extras]);
switch (extra.TagNo)
{
case 1:
{
issuerUniqueID = DerBitString.GetInstance(extra, false);
break;
}
case 2:
{
subjectUniqueID = DerBitString.GetInstance(extra, false);
break;
}
case 3:
{
if (isV2)
throw new ArgumentException("version 2 certificate cannot contain extensions");
extensions = X509Extensions.GetInstance(Asn1Sequence.GetInstance(extra, true));
break;
}
default:
{
throw new ArgumentException("Unknown tag encountered in structure: " + extra.TagNo);
}
}
extras--;
}
}
public int Version
{
get { return version.IntValueExact + 1; }
}
public DerInteger VersionNumber
{
get { return version; }
}
public DerInteger SerialNumber
{
get { return serialNumber; }
}
public AlgorithmIdentifier Signature
{
get { return signature; }
}
public X509Name Issuer
{
get { return issuer; }
}
public Time StartDate
{
get { return startDate; }
}
public Time EndDate
{
get { return endDate; }
}
public X509Name Subject
{
get { return subject; }
}
public SubjectPublicKeyInfo SubjectPublicKeyInfo
{
get { return subjectPublicKeyInfo; }
}
public DerBitString IssuerUniqueID
{
get { return issuerUniqueID; }
}
public DerBitString SubjectUniqueID
{
get { return subjectUniqueID; }
}
public X509Extensions Extensions
{
get { return extensions; }
}
public override Asn1Object ToAsn1Object()
{
string property = Platform.GetEnvironmentVariable("Org.BouncyCastle.X509.Allow_Non-DER_TBSCert");
if (null == property || Platform.EqualsIgnoreCase("true", property))
return seq;
Asn1EncodableVector v = new Asn1EncodableVector(8);
// DEFAULT Zero
if (!version.HasValue(0))
{
v.Add(new DerTaggedObject(true, 0, version));
}
v.Add(serialNumber, signature, issuer);
//
// before and after dates
//
v.Add(new DerSequence(startDate, endDate));
if (subject != null)
{
v.Add(subject);
}
else
{
v.Add(DerSequence.Empty);
}
v.Add(subjectPublicKeyInfo);
// Note: implicit tag
v.AddOptionalTagged(false, 1, issuerUniqueID);
// Note: implicit tag
v.AddOptionalTagged(false, 2, subjectUniqueID);
v.AddOptionalTagged(true, 3, extensions);
return new DerSequence(v);
}
}
}
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