internal TbsCertificateList(
Asn1Sequence seq)
{
if (seq.Count < 3 || seq.Count > 7)
{
throw new ArgumentException("Bad sequence size: " + seq.Count);
}
int seqPos = 0;
this.seq = seq;
if (seq[seqPos] is DerInteger)
{
version = DerInteger.GetInstance(seq[seqPos++]);
}
else
{
version = new DerInteger(0);
}
signature = AlgorithmIdentifier.GetInstance(seq[seqPos++]);
issuer = X509Name.GetInstance(seq[seqPos++]);
thisUpdate = Time.GetInstance(seq[seqPos++]);
if (seqPos < seq.Count &&
(seq[seqPos] is DerUtcTime ||
seq[seqPos] is DerGeneralizedTime ||
seq[seqPos] is Time))
{
nextUpdate = Time.GetInstance(seq[seqPos++]);
}
if (seqPos < seq.Count &&
!(seq[seqPos] is Asn1TaggedObject))
{
revokedCertificates = Asn1Sequence.GetInstance(seq[seqPos++]);
}
if (seqPos < seq.Count &&
seq[seqPos] is Asn1TaggedObject)
{
crlExtensions = X509Extensions.GetInstance(seq[seqPos]);
}
}
internal TbsCertificateStructure(
Asn1Sequence seq)
{
int seqStart = 0;
this.seq = seq;
//
// some certficates don't include a version number - we assume v1
//
if (seq[0] is Asn1TaggedObject)
{
version = DerInteger.GetInstance((Asn1TaggedObject)seq[0], true);
}
else
{
seqStart = -1; // field 0 is missing!
version = new DerInteger(0);
}
bool isV1 = false;
bool isV2 = false;
if (version.Value.Equals(BigInteger.Zero))
{
isV1 = true;
}
else if (version.Value.Equals(BigInteger.One))
{
isV2 = true;
}
else if (!version.Value.Equals(BigInteger.Two))
{
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--;
}
}