//建立加密对象的密钥和偏移量 //原文使用ASCIIEncoding.ASCII方法的GetBytes方法 //使得输入密码必须输入英文文本 des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write); //Write the byte array into the crypto stream //(It will end up in the memory stream) cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); //Get the data back from the memory stream, and into a string StringBuilder ret = new StringBuilder(); foreach(byte b in ms.ToArray()) { //Format as hex ret.AppendFormat("{0:X2}", b); } ret.ToString(); return ret.ToString(); } /// <summary> /// 解密 /// </summary> /// <param name="pToDecrypt"></param> /// <param name="sKey"></param> /// <returns></returns> public string Decrypt(string pToDecrypt, string sKey) { DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//Put the input string into the byte array byte[] inputByteArray = new byte[pToDecrypt.Length / 2]; for(int x = 0; x < pToDecrypt.Length / 2; x++) { int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); inputByteArray[x] = (byte)i; }
//建立加密对象的密钥和偏移量，此值重要，不能修改 des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(),CryptoStreamMode.Write); //Flush the data through the crypto stream into the memory stream cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock();
//Get the decrypted data back from the memory stream //建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象 StringBuilder ret = new StringBuilder();
密码可以加密的to 楼主
可以的，Duwamish中有例子，看看吧
比如说这个DLL(类库)项目和一个Web应用程序项目在同一个Solution里，那么怎样让这个访问数据库的DLL利用到Web应用程序项目中的Web.Config文件呢？
再一次感谢！！！！！(我是新手，请多指教)
XmlDataDocument xdoc=new XmlDataDocument();
xdoc.DataSet.ReadXml(sreader);
DataSet dsxml=xdoc.DataSet;Base.DataSource=dsxml.Tables[0].DefaultView[0][2].ToString();
Base.InitalCatalog=dsxml.Tables[0].DefaultView[0][3].ToString();
Base.loginId=dsxml.Tables[0].DefaultView[0][4].ToString();
Base.password=dsxml.Tables[0].DefaultView[0][5].ToString();
read=true;
//---组成连接字串
Base.Connectstring+="Persist Security Info="+dsxml.Tables[0].DefaultView[0][1].ToString()+";";
Base.Connectstring+="Data Source="+ dsxml.Tables[0].DefaultView[0][2].ToString()+";";
Base.Connectstring+="Initial Catalog="+dsxml.Tables[0].DefaultView[0][3].ToString()+";";
Base.Connectstring+="User Id="+dsxml.Tables[0].DefaultView[0][4].ToString()+";";
Base.Connectstring+="Password="+dsxml.Tables[0].DefaultView[0][5].ToString()+";";xdoc=null;
sreader.Close();
注：这是我的公共类(Base)中的一代码，这是用读取xml 文件用的
字串，下面是一个简单的xml 文件
- <Connstr>
<Provider>SqlOledb.1</Provider>
<Persist>false</Persist>
<DataSource>ds0390</DataSource>
<InitialCatalog>ESD_DB</InitialCatalog>
<UserID>sa</UserID>
<Password></Password>
</Connstr>
/// 加密
/// </summary>
/// <param name="pToEncrypt"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public string Encrypt(string pToEncrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//把字符串放到byte数组中
//原来使用的UTF8编码，我改成Unicode编码了，不行
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
//byte[] inputByteArray=Encoding.Unicode.GetBytes(pToEncrypt);
//建立加密对象的密钥和偏移量
//原文使用ASCIIEncoding.ASCII方法的GetBytes方法
//使得输入密码必须输入英文文本
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write);
//Write the byte array into the crypto stream
//(It will end up in the memory stream)
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//Get the data back from the memory stream, and into a string
StringBuilder ret = new StringBuilder();
foreach(byte b in ms.ToArray())
{
//Format as hex
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
/// <summary>
/// 解密
/// </summary>
/// <param name="pToDecrypt"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public string Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//Put the input string into the byte array
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for(int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
//建立加密对象的密钥和偏移量，此值重要，不能修改
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(),CryptoStreamMode.Write);
//Flush the data through the crypto stream into the memory stream
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//Get the decrypted data back from the memory stream
//建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}