init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Utilities/Net/IPAddress.cs

@@ -0,0 +1,189 @@
+using System;
+using System.Globalization;
+
+namespace Org.BouncyCastle.Utilities.Net;
+
+public class IPAddress
+{
+	public static bool IsValid(string address)
+	{
+		if (!IsValidIPv4(address))
+		{
+			return IsValidIPv6(address);
+		}
+		return true;
+	}
+
+	public static bool IsValidWithNetMask(string address)
+	{
+		if (!IsValidIPv4WithNetmask(address))
+		{
+			return IsValidIPv6WithNetmask(address);
+		}
+		return true;
+	}
+
+	public static bool IsValidIPv4(string address)
+	{
+		try
+		{
+			return unsafeIsValidIPv4(address);
+		}
+		catch (FormatException)
+		{
+		}
+		catch (OverflowException)
+		{
+		}
+		return false;
+	}
+
+	private static bool unsafeIsValidIPv4(string address)
+	{
+		if (address.Length == 0)
+		{
+			return false;
+		}
+		int num = 0;
+		string text = address + ".";
+		int num2 = 0;
+		int num3;
+		while (num2 < text.Length && (num3 = text.IndexOf('.', num2)) > num2)
+		{
+			if (num == 4)
+			{
+				return false;
+			}
+			string s = text.Substring(num2, num3 - num2);
+			int num4 = int.Parse(s);
+			if (num4 < 0 || num4 > 255)
+			{
+				return false;
+			}
+			num2 = num3 + 1;
+			num++;
+		}
+		return num == 4;
+	}
+
+	public static bool IsValidIPv4WithNetmask(string address)
+	{
+		int num = address.IndexOf('/');
+		string text = address.Substring(num + 1);
+		if (num > 0 && IsValidIPv4(address.Substring(0, num)))
+		{
+			if (!IsValidIPv4(text))
+			{
+				return IsMaskValue(text, 32);
+			}
+			return true;
+		}
+		return false;
+	}
+
+	public static bool IsValidIPv6WithNetmask(string address)
+	{
+		int num = address.IndexOf('/');
+		string text = address.Substring(num + 1);
+		if (num > 0)
+		{
+			if (IsValidIPv6(address.Substring(0, num)))
+			{
+				if (!IsValidIPv6(text))
+				{
+					return IsMaskValue(text, 128);
+				}
+				return true;
+			}
+			return false;
+		}
+		return false;
+	}
+
+	private static bool IsMaskValue(string component, int size)
+	{
+		int num = int.Parse(component);
+		try
+		{
+			return num >= 0 && num <= size;
+		}
+		catch (FormatException)
+		{
+		}
+		catch (OverflowException)
+		{
+		}
+		return false;
+	}
+
+	public static bool IsValidIPv6(string address)
+	{
+		try
+		{
+			return unsafeIsValidIPv6(address);
+		}
+		catch (FormatException)
+		{
+		}
+		catch (OverflowException)
+		{
+		}
+		return false;
+	}
+
+	private static bool unsafeIsValidIPv6(string address)
+	{
+		if (address.Length == 0)
+		{
+			return false;
+		}
+		int num = 0;
+		string text = address + ":";
+		bool flag = false;
+		int num2 = 0;
+		int num3;
+		while (num2 < text.Length && (num3 = text.IndexOf(':', num2)) >= num2)
+		{
+			if (num == 8)
+			{
+				return false;
+			}
+			if (num2 != num3)
+			{
+				string text2 = text.Substring(num2, num3 - num2);
+				if (num3 == text.Length - 1 && text2.IndexOf('.') > 0)
+				{
+					if (!IsValidIPv4(text2))
+					{
+						return false;
+					}
+					num++;
+				}
+				else
+				{
+					string s = text.Substring(num2, num3 - num2);
+					int num4 = int.Parse(s, NumberStyles.AllowHexSpecifier);
+					if (num4 < 0 || num4 > 65535)
+					{
+						return false;
+					}
+				}
+			}
+			else
+			{
+				if (num3 != 1 && num3 != text.Length - 1 && flag)
+				{
+					return false;
+				}
+				flag = true;
+			}
+			num2 = num3 + 1;
+			num++;
+		}
+		if (num != 8)
+		{
+			return flag;
+		}
+		return true;
+	}
+}