public X509CertificateStructure(ASN1Sequence seq) {
this.seq = seq;
//
// correct x509 certficate
//
if (seq.size() == 3) {
tbsCert = TBSCertificateStructure.getInstance(seq.getObjectAt(0));
sigAlgId = AlgorithmIdentifier.getInstance(seq.getObjectAt(1));
sig = (DERBitString) seq.getObjectAt(2);
}
}
/**
* Constructor from ASN1Sequence.
*
* <p>the extensions are a list of constructed sequences, either with (OID, OctetString) or (OID,
* Boolean, OctetString)
*/
public X509Extensions(ASN1Sequence seq) {
Enumeration e = seq.getObjects();
while (e.hasMoreElements()) {
ASN1Sequence s = (ASN1Sequence) e.nextElement();
if (s.size() == 3) {
extensions.put(
s.getObjectAt(0),
new X509Extension((DERBoolean) s.getObjectAt(1), (ASN1OctetString) s.getObjectAt(2)));
} else {
extensions.put(
s.getObjectAt(0), new X509Extension(false, (ASN1OctetString) s.getObjectAt(1)));
}
ordering.addElement(s.getObjectAt(0));
}
}
public TBSCertificateStructure(ASN1Sequence seq) {
int seqStart = 0;
this.seq = seq;
//
// some certficates don't include a version number - we assume v1
//
if (seq.getObjectAt(0) instanceof DERTaggedObject) {
version = DERInteger.getInstance(seq.getObjectAt(0));
} else {
seqStart = -1; // field 0 is missing!
version = new DERInteger(0);
}
serialNumber = DERInteger.getInstance(seq.getObjectAt(seqStart + 1));
signature = AlgorithmIdentifier.getInstance(seq.getObjectAt(seqStart + 2));
issuer = X509Name.getInstance(seq.getObjectAt(seqStart + 3));
//
// before and after dates
//
ASN1Sequence dates = (ASN1Sequence) seq.getObjectAt(seqStart + 4);
startDate = Time.getInstance(dates.getObjectAt(0));
endDate = Time.getInstance(dates.getObjectAt(1));
subject = X509Name.getInstance(seq.getObjectAt(seqStart + 5));
//
// public key info.
//
subjectPublicKeyInfo = SubjectPublicKeyInfo.getInstance(seq.getObjectAt(seqStart + 6));
for (int extras = seq.size() - (seqStart + 6) - 1; extras > 0; extras--) {
DERTaggedObject extra = (DERTaggedObject) seq.getObjectAt(seqStart + 6 + extras);
switch (extra.getTagNo()) {
case 1:
issuerUniqueId = DERBitString.getInstance(extra);
break;
case 2:
subjectUniqueId = DERBitString.getInstance(extra);
break;
case 3:
extensions = X509Extensions.getInstance(extra);
}
}
}
