init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/DerNumericString.cs

@@ -0,0 +1,87 @@
+using System;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1;
+
+public class DerNumericString : DerStringBase
+{
+	private readonly string str;
+
+	public static DerNumericString GetInstance(object obj)
+	{
+		if (obj == null || obj is DerNumericString)
+		{
+			return (DerNumericString)obj;
+		}
+		throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
+	}
+
+	public static DerNumericString GetInstance(Asn1TaggedObject obj, bool isExplicit)
+	{
+		Asn1Object asn1Object = obj.GetObject();
+		if (isExplicit || asn1Object is DerNumericString)
+		{
+			return GetInstance(asn1Object);
+		}
+		return new DerNumericString(Asn1OctetString.GetInstance(asn1Object).GetOctets());
+	}
+
+	public DerNumericString(byte[] str)
+		: this(Strings.FromAsciiByteArray(str), validate: false)
+	{
+	}
+
+	public DerNumericString(string str)
+		: this(str, validate: false)
+	{
+	}
+
+	public DerNumericString(string str, bool validate)
+	{
+		if (str == null)
+		{
+			throw new ArgumentNullException("str");
+		}
+		if (validate && !IsNumericString(str))
+		{
+			throw new ArgumentException("string contains illegal characters", "str");
+		}
+		this.str = str;
+	}
+
+	public override string GetString()
+	{
+		return str;
+	}
+
+	public byte[] GetOctets()
+	{
+		return Strings.ToAsciiByteArray(str);
+	}
+
+	internal override void Encode(DerOutputStream derOut)
+	{
+		derOut.WriteEncoded(18, GetOctets());
+	}
+
+	protected override bool Asn1Equals(Asn1Object asn1Object)
+	{
+		if (!(asn1Object is DerNumericString derNumericString))
+		{
+			return false;
+		}
+		return str.Equals(derNumericString.str);
+	}
+
+	public static bool IsNumericString(string str)
+	{
+		foreach (char c in str)
+		{
+			if (c > '\u007f' || (c != ' ' && !char.IsDigit(c)))
+			{
+				return false;
+			}
+		}
+		return true;
+	}
+}