一个简单的c#加密,签名,验签,解密算法.(1)

  // 文件：ParamHashtable.cs, MiniHashtable.cs, Key.cs, MiniDes.cs, CodeSign.cs
// 测试
         // 加载数据
        ParamHashtable mymh  =   new  ParamHashtable();
        mymh.Add( " jobPositionClass " ,  160 );
        mymh.Add( " jobPositionID " ,  - 1 );
        mymh.Add( " area " ,  - 1 );
        mymh.Add( " industry " ,  - 1 );
        mymh.Add( " keyword " ,  " 软件工程师@!@#$%^！·#￥%……软件工程师 " );
         string  str  =  mymh.GetData;
        Response.Write( " 原文： "   +  str  +   "
" );
        Response.Write( "

---

" );

         // 签名
         string  b  =  CodeSign.AddSign(str);
        Response.Write( " 签名： "   +  b  +   "
" );
        Response.Write( "

---

" );
         // 加密
         string  a  =  MiniDes.Encrypt(b);
        Response.Write( " 加密： "   +  a  +   "
" );
        Response.Write( "

---

" );


        Response.Write( "

………………………………………………………………………………………………………… "   +   "
" );
        Response.Write( " 发送…………>接收 "   +   "
" );
        Response.Write( " ………………………………………………………………………………………………………… "   +   "


" );


         // 解密
         string  d  =  MiniDes.Decrypt(a);
        Response.Write( " 解密: "   +  d  +   "
" );
        Response.Write( "

---

" );
         // 验签
         bool  c  =  CodeSign.CheckSign(d);
        Response.Write( " 验签: "   +  c  +   "
" );
        Response.Write( "

---

" );
         // 验签正确，取原文
         string  f  =  CodeSign.GetData(d);
        Response.Write( " 原文： "   +  str  +   "
" );
        Response.Write( "

---

" );

         // 加载数据并输出
        ParamHashtable mymh1  =   new  ParamHashtable();
        mymh1.Add(f);
         for  ( int  i  =   0 ; i  <  mymh1.Length; i ++ )
            Response.Write(mymh1.Name(i)  +   " : "   +  mymh1[i]  +   "
" );

 MiniHashtable.cs

public   class  MiniHashtable
     ... {
        struct StructNameValue
        ...{
            public Object itemName;
            public Object itemValue;
            public void SetValue(Object objName, Object objValue)
            ...{
                itemName = objName;
                itemValue = objValue;
            }
            
        }
        private ArrayList m_alNV;
        public MiniHashtable()
        ...{
            m_alNV = new ArrayList();
        }
       
        public void Add(Object objName, Object objValue)
        ...{
            StructNameValue snvItem = new StructNameValue();
            snvItem.SetValue(objName, objValue);
            m_alNV.Add(snvItem);
        }
        
        public Object this[Object objName]
        ...{
            get
            ...{
                for (int i = 0; i < m_alNV.Count; i++)
                ...{
                    StructNameValue snvItem = (StructNameValue)m_alNV[i];
                    if (snvItem.itemName.Equals(objName))
                        return snvItem.itemValue;
                }
                return null;
            }
        }
        public Object this[int iIndex]
        ...{
            get
            ...{
                if (iIndex < m_alNV.Count)
                ...{
                    StructNameValue snvItem = (StructNameValue)m_alNV[iIndex];
                    return snvItem.itemValue;
                }
                else
                ...{
                    return null;
                }
            } 
        }
        public Object Name(int iIndex)
        ...{
            if (iIndex < m_alNV.Count)
            ...{
                StructNameValue snvItem = (StructNameValue)m_alNV[iIndex];
                return snvItem.itemName;
            }
            else
            ...{
                return null;
            }
        }
        public int Length
        ...{
            get
            ...{
                return m_alNV.Count;
            }
        }
        public void Clear()
        ...{
            m_alNV.Clear();
        }
    }

ParamHashtable.cs

public   class  ParamHashtable : MiniHashtable
     ... {
        public ParamHashtable()
        ...{
        }
        public string GetData
        ...{
            get
            ...{
                string m_tempStr = "";
                for (int i = 0; i < base.Length; i++)
                ...{
                    if (i < base.Length - 1)
                        m_tempStr += base.Name(i) + "=" + base[i] + "&";
                    else
                        m_tempStr += base.Name(i) + "=" + base[i];
                }
                return m_tempStr;
            }
        }

        public void Add(string addHashTableStr)
        ...{
            base.Clear();
            string[] m_strSplit = addHashTableStr.Split(new char[] ...{ '=', '&' }, StringSplitOptions.None);
            for (int i = 0; i < m_strSplit.Length - 1; i++)
            ...{
                base.Add(m_strSplit[i], m_strSplit[i + 1]);
                i += 1;
            }
        }
    }