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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Pqc.Asn1;
using Org.BouncyCastle.Pqc.Crypto.Bike;
using Org.BouncyCastle.Pqc.Crypto.Cmce;
using Org.BouncyCastle.Pqc.Crypto.Crystals.Dilithium;
using Org.BouncyCastle.Pqc.Crypto.Crystals.Kyber;
using Org.BouncyCastle.Pqc.Crypto.Falcon;
using Org.BouncyCastle.Pqc.Crypto.Frodo;
using Org.BouncyCastle.Pqc.Crypto.Hqc;
using Org.BouncyCastle.Pqc.Crypto.Lms;
using Org.BouncyCastle.Pqc.Crypto.Picnic;
using Org.BouncyCastle.Pqc.Crypto.Saber;
using Org.BouncyCastle.Pqc.Crypto.Sike;
using Org.BouncyCastle.Pqc.Crypto.SphincsPlus;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Pqc.Crypto.Utilities
{
public static class PqcPrivateKeyInfoFactory
{
/// <summary> Create a PrivateKeyInfo representation of a private key.</summary>
/// <param name="privateKey"> the key to be encoded into the info object.</param>
/// <returns> the appropriate PrivateKeyInfo</returns>
/// <exception cref="ArgumentException"> on an error encoding the key</exception>
public static PrivateKeyInfo CreatePrivateKeyInfo(AsymmetricKeyParameter privateKey)
{
return CreatePrivateKeyInfo(privateKey, null);
}
/// <summary> Create a PrivateKeyInfo representation of a private key with attributes.</summary>
/// <param name="privateKey"> the key to be encoded into the info object.</param>
/// <param name="attributes"> the set of attributes to be included.</param>
/// <returns> the appropriate PrivateKeyInfo</returns>
/// <exception cref="ArgumentException"> on an error encoding the key</exception>
public static PrivateKeyInfo CreatePrivateKeyInfo(AsymmetricKeyParameter privateKey, Asn1Set attributes)
{
if (privateKey is LmsPrivateKeyParameters lmsPrivateKeyParameters)
{
byte[] encoding = Composer.Compose().U32Str(1).Bytes(lmsPrivateKeyParameters).Build();
byte[] pubEncoding = Composer.Compose().U32Str(1).Bytes(lmsPrivateKeyParameters.GetPublicKey()).Build();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdAlgHssLmsHashsig);
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes, pubEncoding);
}
if (privateKey is HssPrivateKeyParameters hssPrivateKeyParameters)
{
int L = hssPrivateKeyParameters.Level;
byte[] encoding = Composer.Compose().U32Str(L).Bytes(hssPrivateKeyParameters).Build();
byte[] pubEncoding = Composer.Compose().U32Str(L).Bytes(hssPrivateKeyParameters.GetPublicKey().LmsPublicKey).Build();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdAlgHssLmsHashsig);
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes, pubEncoding);
}
if (privateKey is SphincsPlusPrivateKeyParameters sphincsPlusPrivateKeyParameters)
{
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.SphincsPlusOidLookup(sphincsPlusPrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(sphincsPlusPrivateKeyParameters.GetEncoded()), attributes);
}
if (privateKey is CmcePrivateKeyParameters cmcePrivateKeyParameters)
{
byte[] encoding = cmcePrivateKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.McElieceOidLookup(cmcePrivateKeyParameters.Parameters));
CmcePublicKey CmcePub = new CmcePublicKey(cmcePrivateKeyParameters.ReconstructPublicKey());
CmcePrivateKey CmcePriv = new CmcePrivateKey(0, cmcePrivateKeyParameters.Delta,
cmcePrivateKeyParameters.C, cmcePrivateKeyParameters.G, cmcePrivateKeyParameters.Alpha,
cmcePrivateKeyParameters.S, CmcePub);
return new PrivateKeyInfo(algorithmIdentifier, CmcePriv, attributes);
}
if (privateKey is FrodoPrivateKeyParameters frodoPrivateKeyParameters)
{
byte[] encoding = frodoPrivateKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.FrodoOidLookup(frodoPrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes);
}
if (privateKey is SaberPrivateKeyParameters saberPrivateKeyParameters)
{
byte[] encoding = saberPrivateKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.SaberOidLookup(saberPrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes);
}
if (privateKey is PicnicPrivateKeyParameters picnicPrivateKeyParameters)
{
byte[] encoding = picnicPrivateKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.PicnicOidLookup(picnicPrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes);
}
#pragma warning disable CS0618 // Type or member is obsolete
if (privateKey is SikePrivateKeyParameters sikePrivateKeyParameters)
{
byte[] encoding = sikePrivateKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.SikeOidLookup(sikePrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes);
}
#pragma warning restore CS0618 // Type or member is obsolete
if (privateKey is FalconPrivateKeyParameters falconPrivateKeyParameters)
{
Asn1EncodableVector v = new Asn1EncodableVector(4);
v.Add(new DerInteger(1));
v.Add(new DerOctetString(falconPrivateKeyParameters.GetSpolyLittleF()));
v.Add(new DerOctetString(falconPrivateKeyParameters.GetG()));
v.Add(new DerOctetString(falconPrivateKeyParameters.GetSpolyBigF()));
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.FalconOidLookup(falconPrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerSequence(v), attributes,
falconPrivateKeyParameters.GetPublicKey());
}
if (privateKey is KyberPrivateKeyParameters kyberPrivateKeyParameters)
{
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.KyberOidLookup(kyberPrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(kyberPrivateKeyParameters.GetEncoded()), attributes);
}
if (privateKey is DilithiumPrivateKeyParameters dilithiumPrivateKeyParameters)
{
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.DilithiumOidLookup(dilithiumPrivateKeyParameters.Parameters));
DilithiumPublicKeyParameters pubParams = dilithiumPrivateKeyParameters.GetPublicKeyParameters();
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(dilithiumPrivateKeyParameters.GetEncoded()), attributes, pubParams.GetEncoded());
}
if (privateKey is BikePrivateKeyParameters bikePrivateKeyParameters)
{
byte[] encoding = bikePrivateKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.BikeOidLookup(bikePrivateKeyParameters.Parameters));
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes);
}
else if (privateKey is HqcPrivateKeyParameters hqcPrivateKeyParameters)
{
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.HqcOidLookup(hqcPrivateKeyParameters.Parameters));
byte[] encoding = hqcPrivateKeyParameters.PrivateKey;
return new PrivateKeyInfo(algorithmIdentifier, new DerOctetString(encoding), attributes);
}
throw new ArgumentException("Class provided is not convertible: " + Platform.GetTypeName(privateKey));
}
}
}
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