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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Crmf
{
public class PopoSigningKey
: Asn1Encodable
{
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 new PopoSigningKey(Asn1Sequence.GetInstance(obj, isExplicit));
}
private readonly PopoSigningKeyInput m_poposkInput;
private readonly AlgorithmIdentifier m_algorithmIdentifier;
private readonly DerBitString m_signature;
private PopoSigningKey(Asn1Sequence seq)
{
int count = seq.Count;
if (count < 2 || count > 3)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
int pos = 0;
m_poposkInput = Asn1Utilities.ReadOptionalContextTagged(seq, ref pos, 0, false, PopoSigningKeyInput.GetTagged);
m_algorithmIdentifier = AlgorithmIdentifier.GetInstance(seq[pos++]);
m_signature = DerBitString.GetInstance(seq[pos++]);
if (pos != count)
throw new ArgumentException("Unexpected elements in sequence", nameof(seq));
}
/**
* 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)
{
m_poposkInput = poposkIn;
m_algorithmIdentifier = aid ?? throw new ArgumentNullException(nameof(aid));
m_signature = signature ?? throw new ArgumentNullException(nameof(signature));
}
public virtual PopoSigningKeyInput PoposkInput => m_poposkInput;
public virtual AlgorithmIdentifier AlgorithmIdentifier => m_algorithmIdentifier;
public virtual DerBitString Signature => m_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, m_poposkInput);
v.Add(m_algorithmIdentifier);
v.Add(m_signature);
return new DerSequence(v);
}
}
}
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