public class GetMd5Encrypt
{
///
/// DES数据加密 通过DESCryptoServiceProvider对象对字符串进行加密解密
///
/// 目标值
/// 密钥
///
public static string Encrypt(string targetValue, string key)
{
if (string.IsNullOrEmpty(targetValue))
{
return string.Empty;
}
var returnValue = new StringBuilder();
var des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.Default.GetBytes(targetValue);
// 通过两次哈希密码设置对称算法的初始化向量
des.Key = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile
(FormsAuthentication.HashPasswordForStoringInConfigFile(key, "md5").
Substring(0, 8), "sha1").Substring(0, 8));
// 通过两次哈希密码设置算法的机密密钥
des.IV = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile
(FormsAuthentication.HashPasswordForStoringInConfigFile(key, "md5")
.Substring(0, 8), "md5").Substring(0, 8));
var ms = new MemoryStream();
var cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
foreach (byte b in ms.ToArray())
{
returnValue.AppendFormat("{0:X2}", b);
}
return returnValue.ToString();
}
///
/// DES数据解密
///
///
///
///
public static string Decrypt(string targetValue, string key)
{
if (string.IsNullOrEmpty(targetValue))
{
return string.Empty;
}
// 定义DES加密对象
var des = new DESCryptoServiceProvider();
int len = targetValue.Length / 2;
var inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(targetValue.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
// 通过两次哈希密码设置对称算法的初始化向量
des.Key = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile
(FormsAuthentication.HashPasswordForStoringInConfigFile(key, "md5").
Substring(0, 8), "sha1").Substring(0, 8));
// 通过两次哈希密码设置算法的机密密钥
des.IV = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile
(FormsAuthentication.HashPasswordForStoringInConfigFile(key, "md5")
.Substring(0, 8), "md5").Substring(0, 8));
// 定义内存流
var ms = new MemoryStream();
// 定义加密流
var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Encoding.Default.GetString(ms.ToArray());
}
}
}
加密按钮示例：
private void btnPwdMd5_Click(object sender, EventArgs e)
{
string DBLink_No = Convert.ToString(this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "DBLink_No") == null ? "" : this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "DBLink_No"));
string PWD = Convert.ToString(this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "PWD") == null ? "" : this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "PWD"));
bool isPWD_Encyption = Convert.ToBoolean(this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "isPWD_Encyption") == null ? "0" : this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "isPWD_Encyption"));
if (isPWD_Encyption == true)
{
MessageBox.Show("该密码已经加密过，不需再加密！");
}
else
{
//string PWD_Encyption = CommonHelper.Md5Encrypt(PWD); //这个加密后不能解密
string PWD_Encyption = GetMd5Encrypt.Encrypt(PWD, "88");
this.txtPWD.Text = PWD_Encyption;
ProcSqlHelper.ExecuteNonQuery(@"update MultilayerDataInterface_DBLink set isPWD_Encyption=1,PWD=@PWD_Encyption where DBLink_No = @DBLink_No", CommandType.Text, new SqlParameter[] { new SqlParameter("@DBLink_No", DBLink_No), new SqlParameter("@PWD_Encyption", PWD_Encyption) });
AuditDBLink();
this.gridControlDataInterfaceDBLink.DataSource = ProcSqlHelper.ExecuteDatatable(@"SELECT * FROM MultilayerDataInterface_DBLink where 1=1 ", CommandType.Text);
MessageBox.Show("密码加密成功！");
}
}
解密按钮示例：
private void btnDecryptMd5_Click(object sender, EventArgs e)
{
string DBLink_No = Convert.ToString(this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "DBLink_No") == null ? "" : this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "DBLink_No"));
string PWD = Convert.ToString(this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "PWD") == null ? "" : this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "PWD"));
bool isPWD_Encyption = Convert.ToBoolean(this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "isPWD_Encyption") == null ? "0" : this.gridViewDataInterfaceDBLink.GetRowCellValue(this.gridViewDataInterfaceDBLink.FocusedRowHandle, "isPWD_Encyption"));
try
{
if (isPWD_Encyption == false)
{
MessageBox.Show("该密码没有加密过，不需解密！");
}
else
{
//string PWD_Encyption = CommonHelper.Md5Encrypt(PWD); //加密
string PWD_Decrypt = GetMd5Encrypt.Decrypt(PWD, "88"); //解密
this.txtPWD.Text = PWD_Decrypt;
string PWDnew = ";PWD=" + PWD_Decrypt.ToString(); //组成新的;PWD=及后续所有字符串
string DBConnString = this.txtDBConnString.Text.Trim();
this.txtPWDnew.Text = PWDnew;
this.txtDBConnString.Text = DBConnString.Substring(0, DBConnString.LastIndexOf(";PWD=")) + PWDnew.ToString(); //移除;PWD=及后续所有字符串,然后加上新的;PWD=及后续所有字符串
ProcSqlHelper.ExecuteNonQuery(@"update MultilayerDataInterface_DBLink set isPWD_Encyption=0,PWD=@PWD_Decrypt where DBLink_No = @DBLink_No", CommandType.Text, new SqlParameter[] { new SqlParameter("@DBLink_No", DBLink_No), new SqlParameter("@PWD_Decrypt", PWD_Decrypt.ToString()) });
AuditDBLink();
this.gridControlDataInterfaceDBLink.DataSource = ProcSqlHelper.ExecuteDatatable(@"SELECT * FROM MultilayerDataInterface_DBLink where 1=1 ", CommandType.Text);
MessageBox.Show("密码解密成功！");
}
}
catch (Exception)
{
throw new Exception("此密码非此方法加密，无法解密！");
}
}