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我使用"BouncyCastle.Crypto.dll"来加密/解密我的应用程序中的字符串.我正在使用此博客中的以下代码:

1. 我有一个BCEngine类,与上面提到的链接完全相同.

   public class BCEngine
   {
      private readonly Encoding _encoding;
      private readonly IBlockCipher _blockCipher;
      private PaddedBufferedBlockCipher _cipher;
      private IBlockCipherPadding _padding;
   
      public BCEngine(IBlockCipher blockCipher, Encoding encoding)
      {
         _blockCipher = blockCipher;
         _encoding = encoding;
      }
   
      public void SetPadding(IBlockCipherPadding padding)
      {
          if (padding != null)
            _padding = padding;
      }
   
      public string Encrypt(string plain, string key)
      {
          byte[] result = BouncyCastleCrypto(true, _encoding.GetBytes(plain), key);
          return Convert.ToBase64String(result);
      }
   
      public string Decrypt(string cipher, string key)
      {
         byte[] result = BouncyCastleCrypto(false, Convert.FromBase64String(cipher), key);
         return …

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