init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/X509/BasicConstraints.cs

@@ -0,0 +1,116 @@
+using System;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.X509;
+
+public class BasicConstraints : Asn1Encodable
+{
+	private readonly DerBoolean cA;
+
+	private readonly DerInteger pathLenConstraint;
+
+	public BigInteger PathLenConstraint
+	{
+		get
+		{
+			if (pathLenConstraint != null)
+			{
+				return pathLenConstraint.Value;
+			}
+			return null;
+		}
+	}
+
+	public static BasicConstraints GetInstance(Asn1TaggedObject obj, bool explicitly)
+	{
+		return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+	}
+
+	public static BasicConstraints GetInstance(object obj)
+	{
+		if (obj == null || obj is BasicConstraints)
+		{
+			return (BasicConstraints)obj;
+		}
+		if (obj is Asn1Sequence)
+		{
+			return new BasicConstraints((Asn1Sequence)obj);
+		}
+		if (obj is X509Extension)
+		{
+			return GetInstance(X509Extension.ConvertValueToObject((X509Extension)obj));
+		}
+		throw new ArgumentException("unknown object in factory: " + Platform.GetTypeName(obj), "obj");
+	}
+
+	private BasicConstraints(Asn1Sequence seq)
+	{
+		if (seq.Count <= 0)
+		{
+			return;
+		}
+		if (seq[0] is DerBoolean)
+		{
+			cA = DerBoolean.GetInstance(seq[0]);
+		}
+		else
+		{
+			pathLenConstraint = DerInteger.GetInstance(seq[0]);
+		}
+		if (seq.Count > 1)
+		{
+			if (cA == null)
+			{
+				throw new ArgumentException("wrong sequence in constructor", "seq");
+			}
+			pathLenConstraint = DerInteger.GetInstance(seq[1]);
+		}
+	}
+
+	public BasicConstraints(bool cA)
+	{
+		if (cA)
+		{
+			this.cA = DerBoolean.True;
+		}
+	}
+
+	public BasicConstraints(int pathLenConstraint)
+	{
+		cA = DerBoolean.True;
+		this.pathLenConstraint = new DerInteger(pathLenConstraint);
+	}
+
+	public bool IsCA()
+	{
+		if (cA != null)
+		{
+			return cA.IsTrue;
+		}
+		return false;
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
+		if (cA != null)
+		{
+			asn1EncodableVector.Add(cA);
+		}
+		if (pathLenConstraint != null)
+		{
+			asn1EncodableVector.Add(pathLenConstraint);
+		}
+		return new DerSequence(asn1EncodableVector);
+	}
+
+	public override string ToString()
+	{
+		if (pathLenConstraint == null)
+		{
+			return "BasicConstraints: isCa(" + IsCA() + ")";
+		}
+		return "BasicConstraints: isCa(" + IsCA() + "), pathLenConstraint = " + pathLenConstraint.Value;
+	}
+}