From ab860613307c8a82c7ec92370f01c7a199c6c9e4 Mon Sep 17 00:00:00 2001
From: hemant404 <56862469+hemant404@users.noreply.github.com>
Date: Thu, 1 Oct 2020 17:47:34 +0530
Subject: [PATCH] title : Added support for MD2 hashing algo.

---
 .../csharp-password-hash/Hashing.cs           | 30 +++++++++++++++++++
 .../csharp-password-hash/HashingAlgo.cs       |  3 +-
 .../csharp-password-hash.csproj               |  4 +++
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/csharp-password-hash/csharp-password-hash/Hashing.cs b/csharp-password-hash/csharp-password-hash/Hashing.cs
index 396ad91..da73798 100644
--- a/csharp-password-hash/csharp-password-hash/Hashing.cs
+++ b/csharp-password-hash/csharp-password-hash/Hashing.cs
@@ -2,6 +2,7 @@
 using System.Linq;
 using System.Security.Cryptography;
 using System.Text;
+using HashLib;
 
 namespace CSharpPasswordHash
 {
@@ -140,6 +141,9 @@ public static string EncryptPassword(string password, string salt, HashingAlgo h
                 case HashingAlgo.MD5:
                     return ToMd5(password, encodingType);
 
+                case HashingAlgo.MD2:
+                    return CreateMd2(password, encodingType);
+
                 default:
                     throw new ArgumentOutOfRangeException(nameof(hashingAlgo));
             }
@@ -160,6 +164,9 @@ public static bool CheckPassword(string password, string salt, string hash, Hash
                     return ToSHA256(password, encodingType) == hash;
                 case HashingAlgo.MD5:
                     return ToMd5(password, encodingType) == hash;
+                case HashingAlgo.MD2:
+                    return CreateMd2(password, encodingType)==hash;
+
                 default:
                     throw new ArgumentOutOfRangeException(nameof(hashingAlgo));
             }
@@ -174,6 +181,29 @@ public static string GenerateSalt()
                     .Select(s => s[random.Next(s.Length)])
                     .ToArray());
         }
+        private static string CreateMd2(string inputValue, EncodingType encodingType)
+        {
+            byte[] inputValueBytes = Encoding.ASCII.GetBytes(inputValue);
+            return CreateMd2(inputValueBytes, encodingType);
+        }
+        private static string CreateMd2(byte[] inputValueBytes, EncodingType encodingType)
+        {
+            var hash = HashFactory.Crypto.CreateMD2();
+            var hashResult = hash.ComputeBytes(inputValueBytes);
+            var hashBytes = hashResult.GetBytes();
+
+            switch (encodingType)
+            {
+                case EncodingType.Default:
+                    return ConvertToHex(hashBytes);
+                case EncodingType.Base64:
+                    return Convert.ToBase64String(hashBytes);
+                case EncodingType.UTF8:
+                    return Encoding.UTF8.GetString(hashBytes);
+                default:
+                    return ConvertToHex(hashBytes);
+            }
+        }
     }
 
 }
diff --git a/csharp-password-hash/csharp-password-hash/HashingAlgo.cs b/csharp-password-hash/csharp-password-hash/HashingAlgo.cs
index 1472435..730b528 100644
--- a/csharp-password-hash/csharp-password-hash/HashingAlgo.cs
+++ b/csharp-password-hash/csharp-password-hash/HashingAlgo.cs
@@ -6,6 +6,7 @@ public enum HashingAlgo
         MD5 = 1,
         SHA1 = 2,
         SHA256 = 3,
-        HMAC_SHA256 = 4
+        HMAC_SHA256 = 4,
+        MD2=5
     }
 }
\ No newline at end of file
diff --git a/csharp-password-hash/csharp-password-hash/csharp-password-hash.csproj b/csharp-password-hash/csharp-password-hash/csharp-password-hash.csproj
index cb20835..407c392 100644
--- a/csharp-password-hash/csharp-password-hash/csharp-password-hash.csproj
+++ b/csharp-password-hash/csharp-password-hash/csharp-password-hash.csproj
@@ -5,4 +5,8 @@
     <RootNamespace>CSharpPasswordHash</RootNamespace>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="HashLib" Version="2.0.1" />
+  </ItemGroup>
+
 </Project>