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output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/X509/X509SignatureUtilities.cs

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+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.CryptoPro;
+using Org.BouncyCastle.Asn1.Nist;
+using Org.BouncyCastle.Asn1.Oiw;
+using Org.BouncyCastle.Asn1.Pkcs;
+using Org.BouncyCastle.Asn1.TeleTrust;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Crypto;
+
+namespace Org.BouncyCastle.X509;
+
+internal class X509SignatureUtilities
+{
+	private static readonly Asn1Null derNull = DerNull.Instance;
+
+	internal static void SetSignatureParameters(ISigner signature, Asn1Encodable parameters)
+	{
+		if (parameters != null)
+		{
+			derNull.Equals(parameters);
+		}
+	}
+
+	internal static string GetSignatureName(AlgorithmIdentifier sigAlgId)
+	{
+		Asn1Encodable parameters = sigAlgId.Parameters;
+		if (parameters != null && !derNull.Equals(parameters))
+		{
+			if (sigAlgId.Algorithm.Equals(PkcsObjectIdentifiers.IdRsassaPss))
+			{
+				RsassaPssParameters instance = RsassaPssParameters.GetInstance(parameters);
+				return GetDigestAlgName(instance.HashAlgorithm.Algorithm) + "withRSAandMGF1";
+			}
+			if (sigAlgId.Algorithm.Equals(X9ObjectIdentifiers.ECDsaWithSha2))
+			{
+				Asn1Sequence instance2 = Asn1Sequence.GetInstance(parameters);
+				return GetDigestAlgName((DerObjectIdentifier)instance2[0]) + "withECDSA";
+			}
+		}
+		return sigAlgId.Algorithm.Id;
+	}
+
+	private static string GetDigestAlgName(DerObjectIdentifier digestAlgOID)
+	{
+		if (PkcsObjectIdentifiers.MD5.Equals(digestAlgOID))
+		{
+			return "MD5";
+		}
+		if (OiwObjectIdentifiers.IdSha1.Equals(digestAlgOID))
+		{
+			return "SHA1";
+		}
+		if (NistObjectIdentifiers.IdSha224.Equals(digestAlgOID))
+		{
+			return "SHA224";
+		}
+		if (NistObjectIdentifiers.IdSha256.Equals(digestAlgOID))
+		{
+			return "SHA256";
+		}
+		if (NistObjectIdentifiers.IdSha384.Equals(digestAlgOID))
+		{
+			return "SHA384";
+		}
+		if (NistObjectIdentifiers.IdSha512.Equals(digestAlgOID))
+		{
+			return "SHA512";
+		}
+		if (TeleTrusTObjectIdentifiers.RipeMD128.Equals(digestAlgOID))
+		{
+			return "RIPEMD128";
+		}
+		if (TeleTrusTObjectIdentifiers.RipeMD160.Equals(digestAlgOID))
+		{
+			return "RIPEMD160";
+		}
+		if (TeleTrusTObjectIdentifiers.RipeMD256.Equals(digestAlgOID))
+		{
+			return "RIPEMD256";
+		}
+		if (CryptoProObjectIdentifiers.GostR3411.Equals(digestAlgOID))
+		{
+			return "GOST3411";
+		}
+		return digestAlgOID.Id;
+	}
+}