init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Paddings/X923Padding.cs

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+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Crypto.Paddings;
+
+public class X923Padding : IBlockCipherPadding
+{
+	private SecureRandom random;
+
+	public string PaddingName => "X9.23";
+
+	public void Init(SecureRandom random)
+	{
+		this.random = random;
+	}
+
+	public int AddPadding(byte[] input, int inOff)
+	{
+		byte b = (byte)(input.Length - inOff);
+		while (inOff < input.Length - 1)
+		{
+			if (random == null)
+			{
+				input[inOff] = 0;
+			}
+			else
+			{
+				input[inOff] = (byte)random.NextInt();
+			}
+			inOff++;
+		}
+		input[inOff] = b;
+		return b;
+	}
+
+	public int PadCount(byte[] input)
+	{
+		int num = input[^1] & 0xFF;
+		if (num > input.Length)
+		{
+			throw new InvalidCipherTextException("pad block corrupted");
+		}
+		return num;
+	}
+}