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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/x509/SubjectPublicKeyInfoFactory.cs
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Packages/com.tivadar.best.http/Runtime/3rdParty/BouncyCastle/x509/SubjectPublicKeyInfoFactory.cs
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1.CryptoPro;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1.EdEC;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1.Oiw;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1.Pkcs;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1.Rosstandart;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1.X509;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Asn1.X9;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math.EC;
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using Best.HTTP.SecureProtocol.Org.BouncyCastle.Utilities;
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namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.X509
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{
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/// <summary>
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/// A factory to produce Public Key Info Objects.
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/// </summary>
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public static class SubjectPublicKeyInfoFactory
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{
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/// <summary>
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/// Create a Subject Public Key Info object for a given public key.
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/// </summary>
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/// <param name="publicKey">One of ElGammalPublicKeyParameters, DSAPublicKeyParameter, DHPublicKeyParameters, RsaKeyParameters or ECPublicKeyParameters</param>
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/// <returns>A subject public key info object.</returns>
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/// <exception cref="Exception">Throw exception if object provided is not one of the above.</exception>
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public static SubjectPublicKeyInfo CreateSubjectPublicKeyInfo(
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AsymmetricKeyParameter publicKey)
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{
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if (publicKey == null)
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throw new ArgumentNullException("publicKey");
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if (publicKey.IsPrivate)
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throw new ArgumentException("Private key passed - public key expected.", "publicKey");
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if (publicKey is ElGamalPublicKeyParameters)
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{
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ElGamalPublicKeyParameters _key = (ElGamalPublicKeyParameters)publicKey;
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ElGamalParameters kp = _key.Parameters;
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SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
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new AlgorithmIdentifier(
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OiwObjectIdentifiers.ElGamalAlgorithm,
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new ElGamalParameter(kp.P, kp.G).ToAsn1Object()),
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new DerInteger(_key.Y));
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return info;
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}
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if (publicKey is DsaPublicKeyParameters)
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{
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DsaPublicKeyParameters _key = (DsaPublicKeyParameters) publicKey;
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DsaParameters kp = _key.Parameters;
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Asn1Encodable ae = kp == null
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? null
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: new DsaParameter(kp.P, kp.Q, kp.G).ToAsn1Object();
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return new SubjectPublicKeyInfo(
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new AlgorithmIdentifier(X9ObjectIdentifiers.IdDsa, ae),
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new DerInteger(_key.Y));
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}
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if (publicKey is DHPublicKeyParameters)
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{
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DHPublicKeyParameters _key = (DHPublicKeyParameters) publicKey;
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DHParameters kp = _key.Parameters;
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SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
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new AlgorithmIdentifier(
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_key.AlgorithmOid,
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new DHParameter(kp.P, kp.G, kp.L).ToAsn1Object()),
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new DerInteger(_key.Y));
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return info;
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} // End of DH
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if (publicKey is RsaKeyParameters)
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{
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RsaKeyParameters _key = (RsaKeyParameters) publicKey;
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SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
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new AlgorithmIdentifier(PkcsObjectIdentifiers.RsaEncryption, DerNull.Instance),
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new RsaPublicKeyStructure(_key.Modulus, _key.Exponent).ToAsn1Object());
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return info;
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} // End of RSA.
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if (publicKey is ECPublicKeyParameters)
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{
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ECPublicKeyParameters _key = (ECPublicKeyParameters) publicKey;
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if (_key.Parameters is ECGost3410Parameters)
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{
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ECGost3410Parameters gostParams = (ECGost3410Parameters)_key.Parameters;
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BigInteger bX = _key.Q.AffineXCoord.ToBigInteger();
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BigInteger bY = _key.Q.AffineYCoord.ToBigInteger();
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bool is512 = (bX.BitLength > 256);
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Gost3410PublicKeyAlgParameters parameters = new Gost3410PublicKeyAlgParameters(
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gostParams.PublicKeyParamSet,
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gostParams.DigestParamSet,
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gostParams.EncryptionParamSet);
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int encKeySize;
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int offset;
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DerObjectIdentifier algIdentifier;
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if (is512)
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{
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encKeySize = 128;
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offset = 64;
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algIdentifier = RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512;
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}
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else
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{
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encKeySize = 64;
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offset = 32;
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algIdentifier = RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256;
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}
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byte[] encKey = new byte[encKeySize];
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ExtractBytes(encKey, encKeySize / 2, 0, bX);
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ExtractBytes(encKey, encKeySize / 2, offset, bY);
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return new SubjectPublicKeyInfo(new AlgorithmIdentifier(algIdentifier, parameters), new DerOctetString(encKey));
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} // End of ECGOST3410_2012
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if (_key.AlgorithmName == "ECGOST3410")
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{
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if (_key.PublicKeyParamSet == null)
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throw new NotImplementedException("Not a CryptoPro parameter set");
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ECPoint q = _key.Q.Normalize();
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BigInteger bX = q.AffineXCoord.ToBigInteger();
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BigInteger bY = q.AffineYCoord.ToBigInteger();
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byte[] encKey = new byte[64];
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ExtractBytes(encKey, 0, bX);
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ExtractBytes(encKey, 32, bY);
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Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
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_key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet);
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AlgorithmIdentifier algID = new AlgorithmIdentifier(
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CryptoProObjectIdentifiers.GostR3410x2001,
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gostParams.ToAsn1Object());
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return new SubjectPublicKeyInfo(algID, new DerOctetString(encKey));
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}
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else
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{
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X962Parameters x962;
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if (_key.PublicKeyParamSet == null)
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{
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ECDomainParameters kp = _key.Parameters;
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X9ECParameters ecP = new X9ECParameters(kp.Curve, new X9ECPoint(kp.G, false), kp.N, kp.H,
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kp.GetSeed());
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x962 = new X962Parameters(ecP);
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}
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else
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{
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x962 = new X962Parameters(_key.PublicKeyParamSet);
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}
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byte[] pubKey = _key.Q.GetEncoded(false);
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AlgorithmIdentifier algID = new AlgorithmIdentifier(
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X9ObjectIdentifiers.IdECPublicKey, x962.ToAsn1Object());
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return new SubjectPublicKeyInfo(algID, pubKey);
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}
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} // End of EC
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if (publicKey is Gost3410PublicKeyParameters)
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{
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Gost3410PublicKeyParameters _key = (Gost3410PublicKeyParameters) publicKey;
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if (_key.PublicKeyParamSet == null)
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throw new NotImplementedException("Not a CryptoPro parameter set");
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byte[] keyEnc = _key.Y.ToByteArrayUnsigned();
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byte[] keyBytes = new byte[keyEnc.Length];
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for (int i = 0; i != keyBytes.Length; i++)
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{
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keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // must be little endian
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}
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Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
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_key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet);
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AlgorithmIdentifier algID = new AlgorithmIdentifier(
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CryptoProObjectIdentifiers.GostR3410x94,
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algParams.ToAsn1Object());
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return new SubjectPublicKeyInfo(algID, new DerOctetString(keyBytes));
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}
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if (publicKey is X448PublicKeyParameters)
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{
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X448PublicKeyParameters key = (X448PublicKeyParameters)publicKey;
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return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X448), key.GetEncoded());
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}
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if (publicKey is X25519PublicKeyParameters)
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{
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X25519PublicKeyParameters key = (X25519PublicKeyParameters)publicKey;
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return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X25519), key.GetEncoded());
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}
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if (publicKey is Ed448PublicKeyParameters)
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{
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Ed448PublicKeyParameters key = (Ed448PublicKeyParameters)publicKey;
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return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed448), key.GetEncoded());
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}
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if (publicKey is Ed25519PublicKeyParameters)
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{
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Ed25519PublicKeyParameters key = (Ed25519PublicKeyParameters)publicKey;
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return new SubjectPublicKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed25519), key.GetEncoded());
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}
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throw new ArgumentException("Class provided no convertible: " + Org.BouncyCastle.Utilities.Platform.GetTypeName(publicKey));
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}
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private static void ExtractBytes(
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byte[] encKey,
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int offset,
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BigInteger bI)
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{
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byte[] val = bI.ToByteArray();
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int n = (bI.BitLength + 7) / 8;
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for (int i = 0; i < n; ++i)
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{
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encKey[offset + i] = val[val.Length - 1 - i];
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}
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}
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private static void ExtractBytes(byte[] encKey, int size, int offSet, BigInteger bI)
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{
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byte[] val = bI.ToByteArray();
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if (val.Length < size)
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{
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byte[] tmp = new byte[size];
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Array.Copy(val, 0, tmp, tmp.Length - val.Length, val.Length);
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val = tmp;
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}
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for (int i = 0; i != size; i++)
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{
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encKey[offSet + i] = val[val.Length - 1 - i];
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}
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}
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}
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}
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#pragma warning restore
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#endif
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