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using System;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Cmp
{
public class PkiHeader
: Asn1Encodable
{
/**
* Value for a "null" recipient or sender.
*/
public static readonly GeneralName NULL_NAME = new GeneralName(X509Name.GetInstance(new DerSequence()));
public static readonly int CMP_1999 = 1;
public static readonly int CMP_2000 = 2;
private readonly DerInteger pvno;
private readonly GeneralName sender;
private readonly GeneralName recipient;
private readonly DerGeneralizedTime messageTime;
private readonly AlgorithmIdentifier protectionAlg;
private readonly Asn1OctetString senderKID; // KeyIdentifier
private readonly Asn1OctetString recipKID; // KeyIdentifier
private readonly Asn1OctetString transactionID;
private readonly Asn1OctetString senderNonce;
private readonly Asn1OctetString recipNonce;
private readonly PkiFreeText freeText;
private readonly Asn1Sequence generalInfo;
private PkiHeader(Asn1Sequence seq)
{
pvno = DerInteger.GetInstance(seq[0]);
sender = GeneralName.GetInstance(seq[1]);
recipient = GeneralName.GetInstance(seq[2]);
for (int pos = 3; pos < seq.Count; ++pos)
{
Asn1TaggedObject tObj = (Asn1TaggedObject)seq[pos];
switch (tObj.TagNo)
{
case 0:
messageTime = DerGeneralizedTime.GetInstance(tObj, true);
break;
case 1:
protectionAlg = AlgorithmIdentifier.GetInstance(tObj, true);
break;
case 2:
senderKID = Asn1OctetString.GetInstance(tObj, true);
break;
case 3:
recipKID = Asn1OctetString.GetInstance(tObj, true);
break;
case 4:
transactionID = Asn1OctetString.GetInstance(tObj, true);
break;
case 5:
senderNonce = Asn1OctetString.GetInstance(tObj, true);
break;
case 6:
recipNonce = Asn1OctetString.GetInstance(tObj, true);
break;
case 7:
freeText = PkiFreeText.GetInstance(tObj, true);
break;
case 8:
generalInfo = Asn1Sequence.GetInstance(tObj, true);
break;
default:
throw new ArgumentException("unknown tag number: " + tObj.TagNo, nameof(seq));
}
}
}
public static PkiHeader GetInstance(object obj)
{
if (obj is PkiHeader)
return (PkiHeader)obj;
if (obj is Asn1Sequence)
return new PkiHeader((Asn1Sequence)obj);
throw new ArgumentException("Invalid object: " + Platform.GetTypeName(obj), "obj");
}
public PkiHeader(
int pvno,
GeneralName sender,
GeneralName recipient)
: this(new DerInteger(pvno), sender, recipient)
{
}
private PkiHeader(
DerInteger pvno,
GeneralName sender,
GeneralName recipient)
{
this.pvno = pvno;
this.sender = sender;
this.recipient = recipient;
}
public virtual DerInteger Pvno
{
get { return pvno; }
}
public virtual GeneralName Sender
{
get { return sender; }
}
public virtual GeneralName Recipient
{
get { return recipient; }
}
public virtual DerGeneralizedTime MessageTime
{
get { return messageTime; }
}
public virtual AlgorithmIdentifier ProtectionAlg
{
get { return protectionAlg; }
}
public virtual Asn1OctetString SenderKID
{
get { return senderKID; }
}
public virtual Asn1OctetString RecipKID
{
get { return recipKID; }
}
public virtual Asn1OctetString TransactionID
{
get { return transactionID; }
}
public virtual Asn1OctetString SenderNonce
{
get { return senderNonce; }
}
public virtual Asn1OctetString RecipNonce
{
get { return recipNonce; }
}
public virtual PkiFreeText FreeText
{
get { return freeText; }
}
public virtual InfoTypeAndValue[] GetGeneralInfo()
{
if (generalInfo == null)
{
return null;
}
InfoTypeAndValue[] results = new InfoTypeAndValue[generalInfo.Count];
for (int i = 0; i < results.Length; i++)
{
results[i] = InfoTypeAndValue.GetInstance(generalInfo[i]);
}
return results;
}
/**
* <pre>
* PkiHeader ::= SEQUENCE {
* pvno INTEGER { cmp1999(1), cmp2000(2) },
* sender GeneralName,
* -- identifies the sender
* recipient GeneralName,
* -- identifies the intended recipient
* messageTime [0] GeneralizedTime OPTIONAL,
* -- time of production of this message (used when sender
* -- believes that the transport will be "suitable"; i.e.,
* -- that the time will still be meaningful upon receipt)
* protectionAlg [1] AlgorithmIdentifier OPTIONAL,
* -- algorithm used for calculation of protection bits
* senderKID [2] KeyIdentifier OPTIONAL,
* recipKID [3] KeyIdentifier OPTIONAL,
* -- to identify specific keys used for protection
* transactionID [4] OCTET STRING OPTIONAL,
* -- identifies the transaction; i.e., this will be the same in
* -- corresponding request, response, certConf, and PKIConf
* -- messages
* senderNonce [5] OCTET STRING OPTIONAL,
* recipNonce [6] OCTET STRING OPTIONAL,
* -- nonces used to provide replay protection, senderNonce
* -- is inserted by the creator of this message; recipNonce
* -- is a nonce previously inserted in a related message by
* -- the intended recipient of this message
* freeText [7] PKIFreeText OPTIONAL,
* -- this may be used to indicate context-specific instructions
* -- (this field is intended for human consumption)
* generalInfo [8] SEQUENCE SIZE (1..MAX) OF
* InfoTypeAndValue OPTIONAL
* -- this may be used to convey context-specific information
* -- (this field not primarily intended for human consumption)
* }
* </pre>
* @return a basic ASN.1 object representation.
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(pvno, sender, recipient);
v.AddOptionalTagged(true, 0, messageTime);
v.AddOptionalTagged(true, 1, protectionAlg);
v.AddOptionalTagged(true, 2, senderKID);
v.AddOptionalTagged(true, 3, recipKID);
v.AddOptionalTagged(true, 4, transactionID);
v.AddOptionalTagged(true, 5, senderNonce);
v.AddOptionalTagged(true, 6, recipNonce);
v.AddOptionalTagged(true, 7, freeText);
v.AddOptionalTagged(true, 8, generalInfo);
return new DerSequence(v);
}
}
}
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