From 8d2a2cd5de40e2b94ef5007c32832ed9a063dc40 Mon Sep 17 00:00:00 2001
From: chai <215380520@qq.com>
Date: Thu, 12 Oct 2023 22:09:49 +0800
Subject: +hazel-networking

---
 Tools/Hazel-Networking/Hazel.UnitTests/Utils.cs | 99 +++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 Tools/Hazel-Networking/Hazel.UnitTests/Utils.cs

(limited to 'Tools/Hazel-Networking/Hazel.UnitTests/Utils.cs')

diff --git a/Tools/Hazel-Networking/Hazel.UnitTests/Utils.cs b/Tools/Hazel-Networking/Hazel.UnitTests/Utils.cs
new file mode 100644
index 0000000..df62b80
--- /dev/null
+++ b/Tools/Hazel-Networking/Hazel.UnitTests/Utils.cs
@@ -0,0 +1,99 @@
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.OpenSsl;
+using Org.BouncyCastle.Security;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace Hazel.UnitTests
+{
+    static class Utils
+    {
+        /// <summary>
+        /// Hex encode a byte array (lower case)
+        /// </summary>
+        public static string BytesToHex(byte[] data)
+        {
+            string chars = "0123456789abcdef";
+
+            StringBuilder sb = new StringBuilder(data.Length * 2);
+            for (int ii = 0, nn = data.Length; ii != nn; ++ii)
+            {
+                sb.Append(chars[data[ii] >> 4]);
+                sb.Append(chars[data[ii] & 0xF]);
+            }
+
+            return sb.ToString().ToLower();
+        }
+
+        /// <summary>
+        /// Decode a hex string to a byte array (lowercase)
+        /// </summary>
+        public static byte[] HexToBytes(string hex)
+        {
+            hex = hex.ToLower();
+            hex = hex = string.Concat(hex.Where(c => !char.IsWhiteSpace(c)));
+
+            byte[] output = new byte[hex.Length / 2];
+
+            for (int ii = 0; ii != hex.Length; ++ii)
+            {
+                byte nibble;
+
+                char c = hex[ii];
+                if (c >= 'a')
+                {
+                    nibble = (byte)(0x0A + c - 'a');
+                }
+                else
+                {
+                    nibble = (byte)(c - '0');
+                }
+
+                if ((ii & 1) == 0)
+                {
+                    output[ii / 2] = (byte)(nibble << 4);
+                }
+                else
+                {
+                    output[ii / 2] |= nibble;
+                }
+            }
+
+            return output;
+        }
+
+        public static byte[] DecodePEM(string pemData)
+        {
+            List<byte> result = new List<byte>();
+
+            pemData = pemData.Replace("\r", "");
+            string[] lines = pemData.Split('\n');
+            foreach (string line in lines)
+            {
+                if (line.StartsWith("-----"))
+                {
+                    continue;
+                }
+
+                byte[] lineData = Convert.FromBase64String(line);
+                result.AddRange(lineData);
+            }
+
+            return result.ToArray();
+        }
+
+        public static RSA DecodeRSAKeyFromPEM(string pemData)
+        {
+            var pemReader = new PemReader(new StringReader(pemData));
+            var parameters = DotNetUtilities.ToRSAParameters((RsaPrivateCrtKeyParameters)pemReader.ReadObject());
+            var rsa = RSA.Create();
+            rsa.ImportParameters(parameters);
+            return rsa;
+        }
+    }
+}
-- 
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