NopCommerce 定制系列（一）：增加 Sha256+Base64 加密

一、Nop.Core.Domain.Customers.PasswordFormat ( enum  )，增加一个 “S256_B64”。

二、Libraries\Nop.Services\Security\EncryptionService.cs 及其接口增加对应方法

   1: #region

   2: /// <param name="str">string str:被加密的字符串</param>

   3: /// <returns>返回加密后的字符串</returns>

   4: public virtual string S256_B64Encrypt(string str)

   5: {

   6:     System.Security.Cryptography.SHA256 s256 = new System.Security.Cryptography.SHA256Managed();

   7:  

   8:     byte[] byte1;

   9:     byte1 = s256.ComputeHash(Encoding.Default.GetBytes(str));

  10:     s256.Clear();

  11:  

  12:     return Convert.ToBase64String(byte1);

  13: }

  14: #endregion

三、增加对 “S256_B64”的支持，code中有若干处。

   1: switch (customer.PasswordFormat)

   2:                 {

   3:                     case PasswordFormat.Encrypted:

   4:                         oldPwd = _encryptionService.EncryptText(request.OldPassword);

   5:                         break;

   6:                     case PasswordFormat.Hashed:

   7:                         oldPwd = _encryptionService.CreatePasswordHash(request.OldPassword, customer.PasswordSalt, _customerSettings.HashedPasswordFormat);

   8:                         break;

   9:                     #region     这里增加对  “S256_B64”的支持，code中有若干处。

  10:                     case PasswordFormat.S256_B64:

  11:                         oldPwd = _encryptionService.S256_B64Encrypt(request.OldPassword);

  12:                         break;

  13:                     #endregion

  14:                     default:

  15:                         oldPwd = request.OldPassword;

  16:                         break;

  17:                 }

四、广谱搜索关键字“PasswordFormat.Hashed”，将其改成想用的加密方法即可。