using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.CryptoPro; using Org.BouncyCastle.Asn1.EdEC; using Org.BouncyCastle.Asn1.Oiw; using Org.BouncyCastle.Asn1.Pkcs; using Org.BouncyCastle.Asn1.Rosstandart; using Org.BouncyCastle.Asn1.X509; using Org.BouncyCastle.Asn1.X9; using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Crypto.Parameters; using Org.BouncyCastle.Math; using Org.BouncyCastle.Math.EC; using Org.BouncyCastle.Utilities; using System; namespace Org.BouncyCastle.X509 { public static class SubjectPublicKeyInfoFactory { public unsafe 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"); ElGamalPublicKeyParameters elGamalPublicKeyParameters = publicKey as ElGamalPublicKeyParameters; if (elGamalPublicKeyParameters != null) { ElGamalParameters parameters = elGamalPublicKeyParameters.Parameters; ElGamalParameter parameters2 = new ElGamalParameter(parameters.P, parameters.G); return new SubjectPublicKeyInfo(new AlgorithmIdentifier(OiwObjectIdentifiers.ElGamalAlgorithm, parameters2), new DerInteger(elGamalPublicKeyParameters.Y)); } DsaPublicKeyParameters dsaPublicKeyParameters = publicKey as DsaPublicKeyParameters; if (dsaPublicKeyParameters != null) { DsaParameters parameters3 = dsaPublicKeyParameters.Parameters; DsaParameter parameters4 = new DsaParameter(parameters3.P, parameters3.Q, parameters3.G); return new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdDsa, parameters4), new DerInteger(dsaPublicKeyParameters.Y)); } DHPublicKeyParameters dHPublicKeyParameters = publicKey as DHPublicKeyParameters; if (dHPublicKeyParameters != null) { DHParameters parameters5 = dHPublicKeyParameters.Parameters; DHParameter parameters6 = new DHParameter(parameters5.P, parameters5.G, parameters5.L); return new SubjectPublicKeyInfo(new AlgorithmIdentifier(dHPublicKeyParameters.AlgorithmOid, parameters6), new DerInteger(dHPublicKeyParameters.Y)); } RsaKeyParameters rsaKeyParameters = publicKey as RsaKeyParameters; if (rsaKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(PkcsObjectIdentifiers.RsaEncryption, DerNull.Instance), new RsaPublicKeyStructure(rsaKeyParameters.Modulus, rsaKeyParameters.Exponent)); ECPublicKeyParameters eCPublicKeyParameters = publicKey as ECPublicKeyParameters; if (eCPublicKeyParameters != null) { ECPoint q = eCPublicKeyParameters.Q; ECGost3410Parameters eCGost3410Parameters = eCPublicKeyParameters.Parameters as ECGost3410Parameters; if (eCGost3410Parameters != null) { int fieldElementEncodingLength = eCPublicKeyParameters.Parameters.Curve.FieldElementEncodingLength; DerObjectIdentifier algorithm = (fieldElementEncodingLength > 32) ? RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512 : RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256; Gost3410PublicKeyAlgParameters parameters7 = new Gost3410PublicKeyAlgParameters(eCGost3410Parameters.PublicKeyParamSet, eCGost3410Parameters.DigestParamSet, eCGost3410Parameters.EncryptionParamSet); return new SubjectPublicKeyInfo(new AlgorithmIdentifier(algorithm, parameters7), CreateECGost3410PublicKey(fieldElementEncodingLength, q)); } if (eCPublicKeyParameters.AlgorithmName == "ECGOST3410") { if (eCPublicKeyParameters.PublicKeyParamSet == null) throw new NotImplementedException("Not a CryptoPro parameter set"); int fieldElementEncodingLength2 = eCPublicKeyParameters.Parameters.Curve.FieldElementEncodingLength; Gost3410PublicKeyAlgParameters parameters8 = new Gost3410PublicKeyAlgParameters(eCPublicKeyParameters.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet); return new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.GostR3410x2001, parameters8), CreateECGost3410PublicKey(fieldElementEncodingLength2, q)); } X962Parameters parameters9 = eCPublicKeyParameters.Parameters.ToX962Parameters(); int encodedLength = q.GetEncodedLength(false); Span<byte> span; if (encodedLength <= 512) { int num = encodedLength; span = new Span<byte>(stackalloc byte[(int)(uint)num], num); } else span = new byte[encodedLength]; Span<byte> span2 = span; q.EncodeTo(false, span2); return new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, parameters9), span2); } Gost3410PublicKeyParameters gost3410PublicKeyParameters = publicKey as Gost3410PublicKeyParameters; if (gost3410PublicKeyParameters != null) { if (gost3410PublicKeyParameters.PublicKeyParamSet == null) throw new NotImplementedException("Not a CryptoPro parameter set"); byte[] contents = Arrays.ReverseInPlace(gost3410PublicKeyParameters.Y.ToByteArrayUnsigned()); Gost3410PublicKeyAlgParameters parameters10 = new Gost3410PublicKeyAlgParameters(gost3410PublicKeyParameters.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet); return new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.GostR3410x94, parameters10), new DerOctetString(contents)); } X448PublicKeyParameters x448PublicKeyParameters = publicKey as X448PublicKeyParameters; if (x448PublicKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X448), x448PublicKeyParameters.DataSpan); X25519PublicKeyParameters x25519PublicKeyParameters = publicKey as X25519PublicKeyParameters; if (x25519PublicKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X25519), x25519PublicKeyParameters.DataSpan); Ed448PublicKeyParameters ed448PublicKeyParameters = publicKey as Ed448PublicKeyParameters; if (ed448PublicKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed448), ed448PublicKeyParameters.GetEncoded()); Ed25519PublicKeyParameters ed25519PublicKeyParameters = publicKey as Ed25519PublicKeyParameters; if (ed25519PublicKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed25519), ed25519PublicKeyParameters.GetEncoded()); MLDsaPublicKeyParameters mLDsaPublicKeyParameters = publicKey as MLDsaPublicKeyParameters; if (mLDsaPublicKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(mLDsaPublicKeyParameters.Parameters.Oid), mLDsaPublicKeyParameters.GetEncoded()); MLKemPublicKeyParameters mLKemPublicKeyParameters = publicKey as MLKemPublicKeyParameters; if (mLKemPublicKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(mLKemPublicKeyParameters.Parameters.Oid), mLKemPublicKeyParameters.GetEncoded()); SlhDsaPublicKeyParameters slhDsaPublicKeyParameters = publicKey as SlhDsaPublicKeyParameters; if (slhDsaPublicKeyParameters != null) return new SubjectPublicKeyInfo(new AlgorithmIdentifier(slhDsaPublicKeyParameters.Parameters.Oid), slhDsaPublicKeyParameters.GetEncoded()); throw new ArgumentException("Class provided no convertible: " + Platform.GetTypeName(publicKey)); } private static Asn1OctetString CreateECGost3410PublicKey(int fieldSize, ECPoint q) { byte[] array = new byte[fieldSize * 2]; EncodeECGost3410FieldElement(q.AffineXCoord.ToBigInteger(), array, 0, fieldSize); EncodeECGost3410FieldElement(q.AffineYCoord.ToBigInteger(), array, fieldSize, fieldSize); return DerOctetString.WithContents(array); } private static void EncodeECGost3410FieldElement(BigInteger bi, byte[] buf, int off, int len) { BigIntegers.AsUnsignedByteArray(bi, buf, off, len); Array.Reverse(buf, off, len); } } }