using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Serialization.Formatters.Binary;
using System.Security.Cryptography;
using System.Text;
//xlding, 2013/07/25
namespace Gemr.Utils
{
public class CommonAlgorithms
{
#region Sort
public static string[] BubbleSort(string[] array)
{
int length = array.Length;
for (int i = 0; i <= length - 1; i++)
{
for (int j = length - 1; j > i; j--)
{
if (array[j].CompareTo(array[j - 1]) < 0)
{
string temp = array[j];
array[j] = array[j - 1];
array[j - 1] = temp;
}
}
}
return array;
}
#endregion Sort
private static char[] constant =
{
'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
};
public byte[] ConvertStringToByteArray(string str)
{
if (string.IsNullOrEmpty(str)) return null;
byte[] byteArray = System.Text.Encoding.Default.GetBytes(str);
return byteArray;
}
public static string GenerateRandom(int Length)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(52);
Random rd = new Random();
for (int i = 0; i < Length; i++)
{
newRandom.Append(constant[rd.Next(52)]);
}
return newRandom.ToString();
}
/// <summary>
/// Put the object serialization for byte array
/// </summary>
public static byte[] SerializeObject(object obj)
{
if (obj == null)
return null;
MemoryStream ms = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(ms, obj);
ms.Position = 0;
byte[] bytes = new byte[ms.Length];
ms.Read(bytes, 0, bytes.Length);
ms.Close();
return bytes;
}
/// <summary>
/// Byte array reverse serialized into object
/// </summary>
public static object DeserializeObject(byte[] bytes)
{
object obj = null;
if (bytes == null)
return obj;
MemoryStream ms = new MemoryStream(bytes);
ms.Position = 0;
BinaryFormatter formatter = new BinaryFormatter();
obj = formatter.Deserialize(ms);
ms.Close();
return obj;
}
public static string ConvertByteArrayToString(byte[] byteArray)
{
if (byteArray == null || byteArray.Length == 0) return null;
string str = System.Text.Encoding.Default.GetString(byteArray);
return str;
}
//public static string ByteToString(byte[] value)
//{
// StringBuilder sb = new StringBuilder();
// for (int i = 0; i < value.Length; i++)
// {
// sb.Append(value[i].ToString("x2"));
// }
// return sb.ToString();
//}
#region SHA1 (数字签名)
public static string GetSHA1(string strSource)
{
string strResult = "";
//Create
System.Security.Cryptography.SHA1 sha = System.Security.Cryptography.SHA1.Create();
byte[] bytResult = sha.ComputeHash(System.Text.Encoding.UTF8.GetBytes(strSource));
for (int i = 0; i < bytResult.Length; i++)
{
strResult = strResult + bytResult[i].ToString("X2");
}
return strResult;
}
public static byte[] GetSHA1(byte[] value)
{
System.Security.Cryptography.SHA1 sha = System.Security.Cryptography.SHA1.Create();
return sha.ComputeHash(value);
}
#endregion SHA1
#region DES
/**/
/// <summary>
/// DES加密
/// </summary>
/// <param name="encryptString"></param>
/// <returns></returns>
public static string DesEncrypt(string encryptString, string sKey)
{
using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
{
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
}
string str = Convert.ToBase64String(ms.ToArray());
ms.Close();
return str;
}
}
/**/
/// <summary>
/// DES解密
/// </summary>
/// <param name="decryptString"></param>
/// <returns></returns>
public static string DesDecrypt(string decryptString, string sKey)
{
byte[] inputByteArray = Convert.FromBase64String(decryptString);
using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
{
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
cs.Close();
}
string str = Encoding.UTF8.GetString(ms.ToArray());
ms.Close();
return str;
}
}
#endregion DES
#region AES
#region Use static key
private static readonly byte[] aesKey = { 0x03, 0x00, 0x52, 0xc3, 0x03, 0x00, 0x52, 0xc3, 0x03, 0x00, 0x52, 0xc3,
0x03, 0x00, 0x52, 0xc3 };
public static string StaticAeskey
{
get { return System.Text.Encoding.Default.GetString(aesKey); }
}
/// <summary>
/// AES encode.
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static string AesEncode(string value)
{
using (Aes aes = Aes.Create())
{
using (ICryptoTransform encryptor = aes.CreateEncryptor(aesKey, aesKey))
{
byte[] buffer = Encoding.UTF8.GetBytes(value);
buffer = encryptor.TransformFinalBlock(buffer, 0, buffer.Length);
return Convert.ToBase64String(buffer);
}
}
}
/// <summary>
/// AES decode.
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static string AesDecode(string value)
{
using (Aes aes = Aes.Create())
{
using (ICryptoTransform decryptor = aes.CreateDecryptor(aesKey, aesKey))
{
byte[] buffer = Convert.FromBase64String(value);
buffer = decryptor.TransformFinalBlock(buffer, 0, buffer.Length);
return Encoding.UTF8.GetString(buffer);
}
}
}
#endregion Use static key
public static byte[] GetKey()
{
Random rd = new Random();
byte[] key = new byte[16];
rd.NextBytes(key);
return key;
}
public static byte[] AesEncode(byte[] key, byte[] value)
{
using (Aes aes = Aes.Create())
{
using (ICryptoTransform encryptor = aes.CreateEncryptor(key, key))
{
return encryptor.TransformFinalBlock(value, 0, value.Length);
}
}
}
public static byte[] AesDecode(byte[] key, byte[] value)
{
using (Aes aes = Aes.Create())
{
using (ICryptoTransform decryptor = aes.CreateDecryptor(key, key))
{
return decryptor.TransformFinalBlock(value, 0, value.Length);
}
}
}
#endregion AES
}
}