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Encryption

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This commit is contained in:
wook 2017-04-26 23:58:51 +09:00
parent bc5e67e7c3
commit 6f92d292e4
3 changed files with 74 additions and 30 deletions
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12
Encryption/Class1.cs
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@ -1,12 +0,0 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Encryption
{
public class Class1
{
}
}

67
Encryption/Crypto.cs Normal file
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@ -0,0 +1,67 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace Encryption
{
/// <summary>
/// reference: https://msdn.microsoft.com/en-gb/library/system.security.cryptography.tripledescryptoserviceprovider(v=vs.110).aspx
/// </summary>
public class Crypto
{
public List<byte[]> GenerateKeyAndIV()
{
TripleDESCryptoServiceProvider tDES = new TripleDESCryptoServiceProvider();
return new List<byte[]> { tDES.Key, tDES.IV };
}
public string Encrypt(string s, byte[] key, byte[] iv)
{
try
{
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, new TripleDESCryptoServiceProvider().CreateEncryptor(key, iv), CryptoStreamMode.Write);
byte[] toEncrypt = new UTF8Encoding().GetBytes(s);
cStream.Write(toEncrypt, 0, toEncrypt.Length);
cStream.FlushFinalBlock();
byte[] bytesEncrypted = mStream.ToArray();
cStream.Close();
mStream.Close();
return Convert.ToBase64String(bytesEncrypted, 0, bytesEncrypted.Length);
}
catch (CryptographicException e)
{
Console.WriteLine("Error: {0}", e.Message);
return null;
}
}
public string Decrypt(string s, byte[] key, byte[] iv)
{
try
{
byte[] bytesEncrypted = Convert.FromBase64String(s);
MemoryStream mStream = new MemoryStream(bytesEncrypted);
CryptoStream cStream = new CryptoStream(mStream, new TripleDESCryptoServiceProvider().CreateDecryptor(key, iv), CryptoStreamMode.Read);
byte[] fromEncrypt = new byte[s.Length];
cStream.Read(fromEncrypt, 0, fromEncrypt.Length);
return new UTF8Encoding().GetString(fromEncrypt);
}
catch (CryptographicException e)
{
Console.WriteLine("Error: {0}", e.Message);
return null;
}
}
}
}

25
Encryption/Encryption.csproj
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@ -1,10 +1,10 @@
<?xml version="1.0" encoding="utf-8"?>
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>ed031a70-570f-4599-ac04-0453a997a6a4</ProjectGuid>
<ProjectGuid>{ED031A70-570F-4599-AC04-0453A997A6A4}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>Encryption</RootNamespace>
@ -30,24 +30,13 @@
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="System"/>
<Reference Include="System.Core"/>
<Reference Include="System.Xml.Linq"/>
<Reference Include="System.Data.DataSetExtensions"/>
<Reference Include="Microsoft.CSharp"/>
<Reference Include="System.Data"/>
<Reference Include="System.Net.Http"/>
<Reference Include="System.Xml"/>
<Reference Include="System" />
<Reference Include="System.Core" />
<Reference Include="Microsoft.CSharp" />
</ItemGroup>
<ItemGroup>
<Compile Include="Class1.cs" />
<Compile Include="Crypto.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>
</Project>