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using System;
using System.IO;
using System.Net.Security;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Crmf;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
namespace Org.BouncyCastle.Crmf
{
public class ProofOfPossessionSigningKeyBuilder
{
private CertRequest _certRequest;
private SubjectPublicKeyInfo _pubKeyInfo;
private GeneralName _name;
private PKMacValue _publicKeyMAC;
public ProofOfPossessionSigningKeyBuilder(CertRequest certRequest)
{
this._certRequest = certRequest;
}
public ProofOfPossessionSigningKeyBuilder(SubjectPublicKeyInfo pubKeyInfo)
{
this._pubKeyInfo = pubKeyInfo;
}
public ProofOfPossessionSigningKeyBuilder SetSender(GeneralName name)
{
this._name = name;
return this;
}
public ProofOfPossessionSigningKeyBuilder SetPublicKeyMac(PKMacBuilder generator, char[] password)
{
IMacFactory fact = generator.Build(password);
return ImplSetPublicKeyMac(fact);
}
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
public ProofOfPossessionSigningKeyBuilder SetPublicKeyMac(PKMacBuilder generator, ReadOnlySpan<char> password)
{
IMacFactory fact = generator.Build(password);
return ImplSetPublicKeyMac(fact);
}
#endif
public PopoSigningKey Build(ISignatureFactory signer)
{
if (_name != null && _publicKeyMAC != null)
throw new InvalidOperationException("name and publicKeyMAC cannot both be set.");
PopoSigningKeyInput popo;
Asn1Encodable asn1Encodable;
if (_certRequest != null)
{
popo = null;
asn1Encodable = _certRequest;
}
else if (_name != null)
{
popo = new PopoSigningKeyInput(_name, _pubKeyInfo);
asn1Encodable = popo;
}
else
{
popo = new PopoSigningKeyInput(_publicKeyMAC, _pubKeyInfo);
asn1Encodable = popo;
}
var signature = X509.X509Utilities.GenerateSignature(signer, asn1Encodable);
return new PopoSigningKey(popo, (AlgorithmIdentifier)signer.AlgorithmDetails, signature);
}
private ProofOfPossessionSigningKeyBuilder ImplSetPublicKeyMac(IMacFactory macFactory)
{
var macValue = X509.X509Utilities.GenerateMac(macFactory, _pubKeyInfo);
this._publicKeyMAC = new PKMacValue((AlgorithmIdentifier)macFactory.AlgorithmDetails, macValue);
return this;
}
}
}
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