C#代码实现对Windows凭据的管理
private void button1_Click(object sender, EventArgs e) {
//ip地址或者网络路径 例如：TERMSRV/192.168.2.222
string key = txtIP.Text.Trim();
string userName = txtUserName.Text.Trim();
string password = txtPassword.Text.Trim();
//用于标记凭据添加是否成功 i=0:添加成功；i=1:添加失败
int i = 0;
try{
i = NativeCredMan.WriteCred(key,
userName,
password,
CRED_TYPE.DOMAIN_PASSWORD,
CRED_PERSIST.LOCAL_MACHINE);
}
catch{
i = 1;
}
if (i == 0)
txtMsg.Text = "添加成功";
else
txtMsg.Text = "添加失败";
}
/// <summary>
/// 凭据类型
/// </summary>
public enum CRED_TYPE : uint {
//普通凭据
GENERIC = 1,
//域密码
DOMAIN_PASSWORD = 2,
//域证书
DOMAIN_CERTIFICATE = 3,
//域可见密码
DOMAIN_VISIBLE_PASSWORD = 4,
//一般证书
GENERIC_CERTIFICATE = 5,
//域扩展
DOMAIN_EXTENDED = 6,
//最大
MAXIMUM = 7,
// Maximum supported cred type
MAXIMUM_EX = (MAXIMUM + 1000),// Allow new applications to run on old OSes
}
//永久性
public enum CRED_PERSIST : uint {
SESSION = 1, //本地计算机
LOCAL_MACHINE = 2, //企业
ENTERPRISE = 3,
}
internal class NativeCredMan
{
//读取凭据信息
static extern bool CredRead(string target, CRED_TYPE type, int reservedFlag, out IntPtr CredentialPtr);
//增加凭据
static extern bool CredWrite( ref NativeCredential userCredential, UInt32 flags);
static extern bool CredFree( IntPtr cred);
//删除凭据
static extern bool CredDelete(string target, CRED_TYPE type, int flags);
//
//static extern bool CredEnumerateold(string filter, int flag, out int count, out IntPtr pCredentials);
public static extern bool CredEnumerate(string filter, uint flag, out uint count, out IntPtr pCredentials);
private struct NativeCredential{
public UInt32 Flags;
public CRED_TYPE Type;
public IntPtr TargetName;
public IntPtr Comment;
public System.Runtime.InteropServices.ComTypes.FILETIME LastWritten;
public UInt32 CredentialBlobSize;
public IntPtr CredentialBlob;
public UInt32 Persist;
public UInt32 AttributeCount;
public IntPtr Attributes;
public IntPtr TargetAlias;
public IntPtr UserName;
internal static NativeCredential GetNativeCredential(Credential cred)
{
var ncred = new NativeCredential
{
AttributeCount = 0,
Attributes = IntPtr.Zero,
Comment = IntPtr.Zero,
TargetAlias = IntPtr.Zero,
//Type = CRED_TYPE.DOMAIN_PASSWORD,
Type=cred.Type,
Persist = (UInt32)cred.Persist,
CredentialBlobSize = (UInt32)cred.CredentialBlobSize,
TargetName = Marshal.StringToCoTaskMemUni(cred.TargetName),
CredentialBlob = Marshal.StringToCoTaskMemUni(cred.CredentialBlob),
UserName = Marshal.StringToCoTaskMemUni(cred.UserName)
};
return ncred;
}
}
public struct Credential{
public UInt32 Flags;
public CRED_TYPE Type;
public string TargetName;
public string Comment;
public System.Runtime.InteropServices.ComTypes.FILETIME LastWritten;
public UInt32 CredentialBlobSize;
public string CredentialBlob;
public CRED_PERSIST Persist;
public UInt32 AttributeCount;
public IntPtr Attributes;
public string TargetAlias;
public string UserName;
}
/// <summary>
/// 向添加计算机的凭据管理其中添加凭据
/// </summary>
/// <param name="key">internet地址或者网络地址</param>
/// <param name="userName">用户名</param>
/// <param name="secret">密码</param>
/// <param name="type">密码类型</param>
/// <param name="credPersist"></param>
/// <returns></returns>
public static int WriteCred(string key, string userName, string secret, CRED_TYPE type, CRED_PERSIST credPersist)
{
var byteArray = Encoding.Unicode.GetBytes(secret);
if (byteArray.Length > 512)
throw new ArgumentOutOfRangeException("The secret message has exceeded 512 bytes.");
var cred = new Credential
{
TargetName = key,
CredentialBlob = secret,
CredentialBlobSize = (UInt32)Encoding.Unicode.GetBytes(secret).Length,
AttributeCount = 0,
Attributes = IntPtr.Zero,
UserName = userName,
Comment = null,
TargetAlias = null,
Type = type,
Persist = credPersist
};
var ncred = NativeCredential.GetNativeCredential(cred);
var written = CredWrite(ref ncred, 0);
var lastError = Marshal.GetLastWin32Error();
if (written)
{
return 0;
}
var message = "";
if (lastError == 1312)
{
message = (string.Format("Failed to save " + key + " with error code {0}.", lastError)
+ "This error typically occurrs on home editions of Windows XP and Vista.Verify the version of Windows is Pro/Business or higher.");
}
else
{
message = string.Format("Failed to save " + key + " with error code {0}.", lastError);
}
MessageBox.Show(message);
return 1;
}
/// <summary>
/// 读取凭据
/// </summary>
/// <param name="targetName"></param>
/// <param name="credType"></param>
/// <param name="reservedFlag"></param>
/// <param name="intPtr"></param>
/// <returns></returns>
public static bool WReadCred(string targetName,CRED_TYPE credType,int reservedFlag,out IntPtr intPtr)
{
return CredRead(targetName, CRED_TYPE.DOMAIN_PASSWORD, reservedFlag, out intPtr);
}
/// <summary>
/// 删除凭据
/// </summary>
/// <param name="target"></param>
/// <param name="type"></param>
/// <param name="flags"></param>
/// <returns></returns>
public static bool DeleteCred(string target, CRED_TYPE type, int flags)
{
return CredDelete(target, type, flags);
}
}
/// <summary>
/// 查询凭据是否存在
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnQuery_Click(object sender, EventArgs e)
{
string targetName = txtIP.Text.Trim();
IntPtr intPtr=new IntPtr ();
bool flag = false;
try
{
flag = NativeCredMan.WReadCred(targetName, CRED_TYPE.DOMAIN_PASSWORD, 1, out intPtr);
}
catch{
flag = false;
}
if (flag)
txtMsg.Text = "该凭据已存在";
else
txtMsg.Text = "该凭据目前不存在";
}
private void btnDelete_Click(object sender, EventArgs e)
{
string targetName = txtIP.Text.Trim();
bool flag = false;
try
{
flag = NativeCredMan.DeleteCred(targetName, CRED_TYPE.DOMAIN_PASSWORD,0);
}
catch
{
flag = false;
}
if (flag)
txtMsg.Text = "该凭据已删除";
else
txtMsg.Text = "删除失败";
}
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