/// <summary>
/// Set password for a specified local account regardless of old password
/// In this function, we assume the caller has already checked that the user exists.
/// Check it using ExistsLocalAccount method.
/// </summary>
/// <param name="username">local account name</param>
/// <param name="password">new password for the specified local account</param>
internal static void SetLocalAccountPassword(string username, SecureString password)
{
CredentialNativeMethods.USER_INFO_1003 info = new CredentialNativeMethods.USER_INFO_1003();
if (password == null)
{
info.sPassword = Marshal.StringToCoTaskMemUni(String.Empty);
}
else
{
info.sPassword = Marshal.SecureStringToCoTaskMemUnicode(password);
}
IntPtr infoPtr = IntPtr.Zero;
try
{
infoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(info));
Marshal.StructureToPtr(info, infoPtr, false);
uint errParam;
int errCode = CredentialNativeMethods.NetUserSetInfo(null, username, /*information level of infoPtr =*/ 1003, infoPtr, out errParam);
if (errCode != CredentialNativeMethods.NERR_Success)
{
switch (errCode)
{
case CredentialNativeMethods.NERR_UserNotFound:
throw new ArgumentException("The local user " + username + " is not found.");
default:
throw new Exception("Error when setting password for local account " + username + ". Error code: " + errCode);
}
}
}
finally
{
if (info.sPassword != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(info.sPassword);
}
if (infoPtr != IntPtr.Zero)
{
try
{
Marshal.FreeHGlobal(infoPtr);
}
catch { }
}
}
}
/// <summary>
/// Set password for a specified local account regardless of old password
/// In this function, we assume the caller has already checked that the user exists.
/// Check it using ExistsLocalAccount method.
/// </summary>
/// <param name="username">local account name</param>
/// <param name="password">new password for the specified local account</param>
internal static void SetLocalAccountPassword(string username, SecureString password)
{
CredentialNativeMethods.USER_INFO_1003 info = new CredentialNativeMethods.USER_INFO_1003();
if (password == null)
{
info.sPassword = Marshal.StringToCoTaskMemUni(String.Empty);
}
else
{
info.sPassword = Marshal.SecureStringToCoTaskMemUnicode(password);
}
IntPtr infoPtr = IntPtr.Zero;
try
{
infoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(info));
Marshal.StructureToPtr(info, infoPtr, false);
uint errParam;
int errCode = CredentialNativeMethods.NetUserSetInfo(null, username, /*information level of infoPtr =*/1003, infoPtr, out errParam);
if (errCode != CredentialNativeMethods.NERR_Success)
{
switch (errCode)
{
case CredentialNativeMethods.NERR_UserNotFound:
throw new ArgumentException("The local user " + username + " is not found.");
default:
throw new Exception("Error when setting password for local account " + username + ". Error code: " + errCode);
}
}
}
finally
{
if (info.sPassword != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(info.sPassword);
}
if (infoPtr != IntPtr.Zero)
{
try
{
Marshal.FreeHGlobal(infoPtr);
}
catch { }
}
}
}
