using System;
using System.Collections;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Cms;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Security.Certificates;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.Utilities.IO;
using Org.BouncyCastle.X509;
using Org.BouncyCastle.X509.Store;

namespace Org.BouncyCastle.Cms;

internal class CmsUtilities
{
	internal static int MaximumMemory
	{
		get
		{
			long num = 2147483647L;
			if (num > int.MaxValue)
			{
				return int.MaxValue;
			}
			return (int)num;
		}
	}

	internal static ContentInfo ReadContentInfo(byte[] input)
	{
		return ReadContentInfo(new Asn1InputStream(input));
	}

	internal static ContentInfo ReadContentInfo(Stream input)
	{
		return ReadContentInfo(new Asn1InputStream(input, MaximumMemory));
	}

	private static ContentInfo ReadContentInfo(Asn1InputStream aIn)
	{
		try
		{
			return ContentInfo.GetInstance(aIn.ReadObject());
		}
		catch (IOException e)
		{
			throw new CmsException("IOException reading content.", e);
		}
		catch (InvalidCastException e2)
		{
			throw new CmsException("Malformed content.", e2);
		}
		catch (ArgumentException e3)
		{
			throw new CmsException("Malformed content.", e3);
		}
	}

	public static byte[] StreamToByteArray(Stream inStream)
	{
		return Streams.ReadAll(inStream);
	}

	public static byte[] StreamToByteArray(Stream inStream, int limit)
	{
		return Streams.ReadAllLimited(inStream, limit);
	}

	public static IList GetCertificatesFromStore(IX509Store certStore)
	{
		try
		{
			IList list = Platform.CreateArrayList();
			if (certStore != null)
			{
				foreach (X509Certificate match in certStore.GetMatches(null))
				{
					list.Add(X509CertificateStructure.GetInstance(Asn1Object.FromByteArray(match.GetEncoded())));
				}
			}
			return list;
		}
		catch (CertificateEncodingException e)
		{
			throw new CmsException("error encoding certs", e);
		}
		catch (Exception e2)
		{
			throw new CmsException("error processing certs", e2);
		}
	}

	public static IList GetCrlsFromStore(IX509Store crlStore)
	{
		try
		{
			IList list = Platform.CreateArrayList();
			if (crlStore != null)
			{
				foreach (X509Crl match in crlStore.GetMatches(null))
				{
					list.Add(CertificateList.GetInstance(Asn1Object.FromByteArray(match.GetEncoded())));
				}
			}
			return list;
		}
		catch (CrlException e)
		{
			throw new CmsException("error encoding crls", e);
		}
		catch (Exception e2)
		{
			throw new CmsException("error processing crls", e2);
		}
	}

	public static Asn1Set CreateBerSetFromList(IList berObjects)
	{
		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
		foreach (Asn1Encodable berObject in berObjects)
		{
			asn1EncodableVector.Add(berObject);
		}
		return new BerSet(asn1EncodableVector);
	}

	public static Asn1Set CreateDerSetFromList(IList derObjects)
	{
		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
		foreach (Asn1Encodable derObject in derObjects)
		{
			asn1EncodableVector.Add(derObject);
		}
		return new DerSet(asn1EncodableVector);
	}

	internal static Stream CreateBerOctetOutputStream(Stream s, int tagNo, bool isExplicit, int bufferSize)
	{
		BerOctetStringGenerator berOctetStringGenerator = new BerOctetStringGenerator(s, tagNo, isExplicit);
		return berOctetStringGenerator.GetOctetOutputStream(bufferSize);
	}

	internal static TbsCertificateStructure GetTbsCertificateStructure(X509Certificate cert)
	{
		return TbsCertificateStructure.GetInstance(Asn1Object.FromByteArray(cert.GetTbsCertificate()));
	}

	internal static IssuerAndSerialNumber GetIssuerAndSerialNumber(X509Certificate cert)
	{
		TbsCertificateStructure tbsCertificateStructure = GetTbsCertificateStructure(cert);
		return new IssuerAndSerialNumber(tbsCertificateStructure.Issuer, tbsCertificateStructure.SerialNumber.Value);
	}
}