C# MD5加密
#region 密码加密32位
/// <summary>
/// 密码加密32位
/// </summary>
/// <param name="password"></param>
/// <returns></returns>
public static string Create32BitMd5Password(string password)
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile
(password, "MD5").ToLower();
}
#endregion
silverlight 字符串加密
#region silverlight数据加密 /**/ /// <summary> /// 加密数据 /// </summary> /// <param name="input">加密前的字符串</param> /// <returns>加密后的字符串</returns> public static string Encrypt(string input) { // 盐值 string saltValue = "saltValue"; // 密码值 string pwdValue = "pwdValue"; byte[] data = System.Text.UTF8Encoding.UTF8.GetBytes(input); byte[] salt = System.Text.UTF8Encoding.UTF8.GetBytes(saltValue); // AesManaged - 高级加密标准(AES) 对称算法的管理类 System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged(); // Rfc2898DeriveBytes - 通过使用基于 HMACSHA1 的伪随机数生成器,实现基于密码的密钥派生功能 (PBKDF2 - 一种基于密码的密钥派生函数) // 通过 密码 和 salt 派生密钥 System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(pwdValue, salt); aes.BlockSize = aes.LegalBlockSizes[0].MaxSize; aes.KeySize = aes.LegalKeySizes[0].MaxSize; aes.Key = rfc.GetBytes(aes.KeySize / 8); aes.IV = rfc.GetBytes(aes.BlockSize / 8); // 用当前的 Key 属性和初始化向量 IV 创建对称加密器对象 System.Security.Cryptography.ICryptoTransform encryptTransform = aes.CreateEncryptor(); // 加密后的输出流 System.IO.MemoryStream encryptStream = new System.IO.MemoryStream(); // 将加密后的目标流(encryptStream)与加密转换(encryptTransform)相连接 System.Security.Cryptography.CryptoStream encryptor = new System.Security.Cryptography.CryptoStream (encryptStream, encryptTransform, System.Security.Cryptography.CryptoStreamMode.Write); // 将一个字节序列写入当前 CryptoStream (完成加密的过程) encryptor.Write(data, 0, data.Length); encryptor.Close(); // 将加密后所得到的流转换成字节数组,再用Base64编码将其转换为字符串 string encryptedString = Convert.ToBase64String(encryptStream.ToArray()); return encryptedString; } #endregion
#region silverlight密码解密 /**/ /// <summary> /// 解密数据 /// </summary> /// <param name="input">加密后的字符串</param> /// <returns>加密前的字符串</returns> public string Decrypt(string input) { // 盐值(与加密时设置的值一致) string saltValue = "saltValue"; // 密码值(与加密时设置的值一致) string pwdValue = "pwdValue"; byte[] encryptBytes = Convert.FromBase64String(input); byte[] salt = Encoding.UTF8.GetBytes(saltValue); System.Security.Cryptography.AesManaged aes = new System.Security.Cryptography.AesManaged(); System.Security.Cryptography.Rfc2898DeriveBytes rfc = new System.Security.Cryptography.Rfc2898DeriveBytes(pwdValue, salt); aes.BlockSize = aes.LegalBlockSizes[0].MaxSize; aes.KeySize = aes.LegalKeySizes[0].MaxSize; aes.Key = rfc.GetBytes(aes.KeySize / 8); aes.IV = rfc.GetBytes(aes.BlockSize / 8); // 用当前的 Key 属性和初始化向量 IV 创建对称解密器对象 System.Security.Cryptography.ICryptoTransform decryptTransform = aes.CreateDecryptor(); // 解密后的输出流 System.IO.MemoryStream decryptStream = new System.IO.MemoryStream(); // 将解密后的目标流(decryptStream)与解密转换(decryptTransform)相连接 System.Security.Cryptography.CryptoStream decryptor = new System.Security.Cryptography.CryptoStream( decryptStream, decryptTransform, System.Security.Cryptography.CryptoStreamMode.Write); // 将一个字节序列写入当前 CryptoStream (完成解密的过程) decryptor.Write(encryptBytes, 0, encryptBytes.Length); decryptor.Close(); // 将解密后所得到的流转换为字符串 byte[] decryptBytes = decryptStream.ToArray(); string decryptedString = UTF8Encoding.UTF8.GetString(decryptBytes, 0, decryptBytes.Length); return decryptedString; } #endregion