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using System;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Crmf
{
public class PopoSigningKey
: Asn1Encodable
{
private readonly PopoSigningKeyInput poposkInput;
private readonly AlgorithmIdentifier algorithmIdentifier;
private readonly DerBitString signature;
private PopoSigningKey(Asn1Sequence seq)
{
int index = 0;
if (seq[index] is Asn1TaggedObject tagObj)
{
index++;
poposkInput = PopoSigningKeyInput.GetInstance(
Asn1Utilities.GetContextBaseUniversal(tagObj, 0, false, Asn1Tags.Sequence));
}
algorithmIdentifier = AlgorithmIdentifier.GetInstance(seq[index++]);
signature = DerBitString.GetInstance(seq[index]);
}
public static PopoSigningKey GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is PopoSigningKey popoSigningKey)
return popoSigningKey;
return new PopoSigningKey(Asn1Sequence.GetInstance(obj));
}
public static PopoSigningKey GetInstance(Asn1TaggedObject obj, bool isExplicit)
{
return GetInstance(Asn1Sequence.GetInstance(obj, isExplicit));
}
/**
* Creates a new Proof of Possession object for a signing key.
* @param poposkIn the PopoSigningKeyInput structure, or null if the
* CertTemplate includes both subject and publicKey values.
* @param aid the AlgorithmIdentifier used to sign the proof of possession.
* @param signature a signature over the DER-encoded value of poposkIn,
* or the DER-encoded value of certReq if poposkIn is null.
*/
public PopoSigningKey(
PopoSigningKeyInput poposkIn,
AlgorithmIdentifier aid,
DerBitString signature)
{
this.poposkInput = poposkIn;
this.algorithmIdentifier = aid;
this.signature = signature;
}
public virtual PopoSigningKeyInput PoposkInput
{
get { return poposkInput; }
}
public virtual AlgorithmIdentifier AlgorithmIdentifier
{
get { return algorithmIdentifier; }
}
public virtual DerBitString Signature
{
get { return signature; }
}
/**
* <pre>
* PopoSigningKey ::= SEQUENCE {
* poposkInput [0] PopoSigningKeyInput OPTIONAL,
* algorithmIdentifier AlgorithmIdentifier,
* signature BIT STRING }
* -- The signature (using "algorithmIdentifier") is on the
* -- DER-encoded value of poposkInput. NOTE: If the CertReqMsg
* -- certReq CertTemplate contains the subject and publicKey values,
* -- then poposkInput MUST be omitted and the signature MUST be
* -- computed on the DER-encoded value of CertReqMsg certReq. If
* -- the CertReqMsg certReq CertTemplate does not contain the public
* -- key and subject values, then poposkInput MUST be present and
* -- MUST be signed. This strategy ensures that the public key is
* -- not present in both the poposkInput and CertReqMsg certReq
* -- CertTemplate fields.
* </pre>
* @return a basic ASN.1 object representation.
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(3);
v.AddOptionalTagged(false, 0, poposkInput);
v.Add(algorithmIdentifier);
v.Add(signature);
return new DerSequence(v);
}
}
}
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