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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
{
/// <summary>
/// A factory to produce Public Key Info Objects.
/// </summary>
public static class PqcSubjectPublicKeyInfoFactory
{
/// <summary>
/// Create a Subject Public Key Info object for a given public key.
/// </summary>
/// <param name="publicKey">One of ElGammalPublicKeyParameters, DSAPublicKeyParameter, DHPublicKeyParameters, RsaKeyParameters or ECPublicKeyParameters</param>
/// <returns>A subject public key info object.</returns>
/// <exception cref="Exception">Throw exception if object provided is not one of the above.</exception>
public static SubjectPublicKeyInfo CreateSubjectPublicKeyInfo(AsymmetricKeyParameter publicKey)
{
if (publicKey == null)
throw new ArgumentNullException("publicKey");
if (publicKey.IsPrivate)
throw new ArgumentException("Private key passed - public key expected.", "publicKey");
if (publicKey is LmsPublicKeyParameters lmsPublicKeyParameters)
{
byte[] encoding = Composer.Compose().U32Str(1).Bytes(lmsPublicKeyParameters).Build();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdAlgHssLmsHashsig);
return new SubjectPublicKeyInfo(algorithmIdentifier, new DerOctetString(encoding));
}
if (publicKey is HssPublicKeyParameters hssPublicKeyParameters)
{
int L = hssPublicKeyParameters.Level;
byte[] encoding = Composer.Compose().U32Str(L).Bytes(hssPublicKeyParameters.LmsPublicKey).Build();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdAlgHssLmsHashsig);
return new SubjectPublicKeyInfo(algorithmIdentifier, new DerOctetString(encoding));
}
if (publicKey is SphincsPlusPublicKeyParameters sphincsPlusPublicKeyParameters)
{
byte[] encoding = sphincsPlusPublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.SphincsPlusOidLookup(sphincsPlusPublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, encoding);
}
if (publicKey is CmcePublicKeyParameters cmcePublicKeyParameters)
{
byte[] encoding = cmcePublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.McElieceOidLookup(cmcePublicKeyParameters.Parameters));
// https://datatracker.ietf.org/doc/draft-uni-qsckeys/
return new SubjectPublicKeyInfo(algorithmIdentifier, new CmcePublicKey(encoding));
}
else if (publicKey is FrodoPublicKeyParameters frodoPublicKeyParameters)
{
byte[] encoding = frodoPublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.FrodoOidLookup(frodoPublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, new DerOctetString(encoding));
}
if (publicKey is SaberPublicKeyParameters saberPublicKeyParameters)
{
byte[] encoding = saberPublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.SaberOidLookup(saberPublicKeyParameters.Parameters));
// https://datatracker.ietf.org/doc/draft-uni-qsckeys/
return new SubjectPublicKeyInfo(algorithmIdentifier, new DerSequence(new DerOctetString(encoding)));
}
if (publicKey is PicnicPublicKeyParameters picnicPublicKeyParameters)
{
byte[] encoding = picnicPublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.PicnicOidLookup(picnicPublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, new DerOctetString(encoding));
}
#pragma warning disable CS0618 // Type or member is obsolete
if (publicKey is SikePublicKeyParameters sikePublicKeyParameters)
{
byte[] encoding = sikePublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.SikeOidLookup(sikePublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, new DerOctetString(encoding));
}
#pragma warning restore CS0618 // Type or member is obsolete
if (publicKey is FalconPublicKeyParameters falconPublicKeyParameters)
{
byte[] keyEnc = falconPublicKeyParameters.GetEncoded();
byte[] encoding = new byte[keyEnc.Length + 1];
encoding[0] = (byte)(0x00 + falconPublicKeyParameters.Parameters.LogN);
Array.Copy(keyEnc, 0, encoding, 1, keyEnc.Length);
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.FalconOidLookup(falconPublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, encoding);
}
if (publicKey is KyberPublicKeyParameters kyberPublicKeyParameters)
{
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.KyberOidLookup(kyberPublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, kyberPublicKeyParameters.GetEncoded());
}
if (publicKey is DilithiumPublicKeyParameters dilithiumPublicKeyParameters)
{
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.DilithiumOidLookup(dilithiumPublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, dilithiumPublicKeyParameters.GetEncoded());
}
if (publicKey is BikePublicKeyParameters bikePublicKeyParameters)
{
byte[] encoding = bikePublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.BikeOidLookup(bikePublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, encoding);
}
if (publicKey is HqcPublicKeyParameters hqcPublicKeyParameters)
{
byte[] encoding = hqcPublicKeyParameters.GetEncoded();
AlgorithmIdentifier algorithmIdentifier = new AlgorithmIdentifier(
PqcUtilities.HqcOidLookup(hqcPublicKeyParameters.Parameters));
return new SubjectPublicKeyInfo(algorithmIdentifier, encoding);
}
throw new ArgumentException("Class provided no convertible: " + Platform.GetTypeName(publicKey));
}
}
}
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