using System;
using System.Globalization;
using System.IO;
using System.Security.Cryptography;
using System.Text;namespace Utils
{/// <summary>/// 密码加密解密操作相关类/// </summary>public class PassWordHelper{#region MD5 - 32 加密/// <summary>/// MD5 - 32加密/// </summary>/// <param name="source">待加密字段</param>/// <returns></returns>public string Md5(string source){MD5 md5 = MD5.Create();byte[] btStr = Encoding.UTF8.GetBytes(source);byte[] hashStr = md5.ComputeHash(btStr);StringBuilder pwd = new StringBuilder();foreach (byte bStr in hashStr) { pwd.Append(bStr.ToString("x2")); }return pwd.ToString();}/// <summary>/// 加盐MD5 -32 加密/// </summary>/// <param name="source">待加密字段</param>/// <param name="salt">盐巴字段</param>/// <returns></returns>public string Md5Salt(string source, string salt){return salt.IsEmpty() ? source.Md5() : (source + "『" + salt + "』").Md5();}#endregion#region DES 加密解密/// <summary>/// DES 字符串型加密/// </summary>/// <param name="source">待加密字段</param>/// <param name="keyVal">8位密钥值</param>/// <param name="ivVal">8位加密辅助向量</param>/// <returns>类似：xQ969nexy964SXhkTuekUQ==</returns>public string DesStr(string source, string keyVal, string ivVal){try{byte[] btKey = Encoding.UTF8.GetBytes(keyVal.Length > 8 ? keyVal.Substring(0, 8) : keyVal);byte[] btIv = Encoding.UTF8.GetBytes(ivVal.Length > 8 ? ivVal.Substring(0, 8) : ivVal);DESCryptoServiceProvider des = new DESCryptoServiceProvider();using (MemoryStream ms = new MemoryStream()){byte[] inData = Encoding.UTF8.GetBytes(source);try{using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(btKey, btIv), CryptoStreamMode.Write)){cs.Write(inData, 0, inData.Length);cs.FlushFinalBlock();}return Convert.ToBase64String(ms.ToArray());}catch{return source;}}}catch { return "DES加密出错"; }}/// <summary>/// DES 字符串型解密/// </summary>/// <param name="source">待解密字段</param>/// <param name="keyVal">8位密钥值</param>/// <param name="ivVal">8位加密辅助向量</param>/// <returns></returns>public string UnDesStr(string source, string keyVal, string ivVal){byte[] btKey = Encoding.UTF8.GetBytes(keyVal.Length > 8 ? keyVal.Substring(0, 8) : keyVal);byte[] btIv = Encoding.UTF8.GetBytes(ivVal.Length > 8 ? ivVal.Substring(0, 8) : ivVal);DESCryptoServiceProvider des = new DESCryptoServiceProvider();using (MemoryStream ms = new MemoryStream()){byte[] inData = Convert.FromBase64String(source);try{using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(btKey, btIv), CryptoStreamMode.Write)){cs.Write(inData, 0, inData.Length);cs.FlushFinalBlock();}return Encoding.UTF8.GetString(ms.ToArray());}catch{return source;}}  }/// <summary>/// DES MAC地址型加密/// </summary>/// <param name="source">待加密字段</param>/// <param name="keyVal">8位密钥值</param>/// <param name="ivVal">8位加密辅助向量</param>/// <returns></returns>public string DesMac(string source, string keyVal, string ivVal){try{byte[] data = Encoding.UTF8.GetBytes(source);var des = new DESCryptoServiceProvider { Key = Encoding.ASCII.GetBytes(keyVal.Length > 8 ? keyVal.Substring(0, 8) : keyVal), IV = Encoding.ASCII.GetBytes(ivVal.Length > 8 ? ivVal.Substring(0, 8) : ivVal) };var desencrypt = des.CreateEncryptor();byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);return BitConverter.ToString(result);}catch { return "转换出错！"; }}/// <summary>/// DES MAC地址型解密/// </summary>/// <param name="source">待解密字段</param>/// <param name="keyVal">8位密钥值</param>/// <param name="ivVal">8位加密辅助向量</param>/// <returns></returns>public string UnDesMac(string source, string keyVal, string ivVal){try{string[] sInput = source.Split("-".ToCharArray());byte[] data = new byte[sInput.Length];for (int i = 0; i < sInput.Length; i++){data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber);}var des = new DESCryptoServiceProvider { Key = Encoding.ASCII.GetBytes(keyVal.Length > 8 ? keyVal.Substring(0, 8) : keyVal), IV = Encoding.ASCII.GetBytes(ivVal.Length > 8 ? ivVal.Substring(0, 8) : ivVal) };var desencrypt = des.CreateDecryptor();byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);return Encoding.UTF8.GetString(result);}catch { return "解密出错！"; }}#endregion#region RSA 加密解密//密钥对private const string PublicRsaKey = @"<RSAKeyValue><Modulus>x</Modulus><Exponent>e</Exponent></RSAKeyValue>";private const string PrivateRsaKey = @"<RSAKeyValue><Modulus>x</Modulus><Exponent>e</Exponent><P>p</P><Q>q</Q><DP>dp</DP><DQ>dq</DQ><InverseQ>iq</InverseQ><D>d</D></RSAKeyValue>";/// <summary>/// RSA 加密/// </summary>/// <param name="source">待加密字段</param>/// <returns></returns>public string Rsa(string source){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(PublicRsaKey);var cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(source), true);return Convert.ToBase64String(cipherbytes);}/// <summary>/// RSA解密/// </summary>/// <param name="source">待解密字段</param>/// <returns></returns>public string UnRsa(string source){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(PrivateRsaKey);var cipherbytes = rsa.Decrypt(Convert.FromBase64String(source), true);return Encoding.UTF8.GetString(cipherbytes);}#endregion}
}