以編程方式讀取本地密碼策略

Question

是否有Windows API函數允許讀取當前密碼策略是什么？ 例如，最小長度，復雜性等。

如果沒有閱讀，有沒有辦法以編程方式驗證策略的密碼？

Answer 1

請參閱安全性監視Windows域密碼策略 。 您可以使用ADSI或其包裝器來命中AD。 我找到了一個VBScript樣本 。 您可以將其翻譯成您想要的任何語言：

Sub ListPasswordPolicyInfo( strDomain )
    Dim objComputer
    Set objComputer = GetObject("WinNT://" & strDomain )
    WScript.Echo "MinPasswordAge: " &  ((objComputer.MinPasswordAge) / 86400)
    WScript.Echo "MinPasswordLength: " &  objComputer.MinPasswordLength
    WScript.Echo "PasswordHistoryLength: " &  objComputer.PasswordHistoryLength
    WScript.Echo "AutoUnlockInterval: " &  objComputer.AutoUnlockInterval
    WScript.Echo "LockOutObservationInterval: " &  objComputer.LockOutObservationInterval
End Sub

Dim strDomain
Do
    strDomain = inputbox( "Please enter a domainname", "Input" )
Loop until strDomain <> ""

ListPasswordPolicyInfo( strDomain )

作為獎勵，請查看LDAP管理員 。 它是一個開源的LDAP目錄編輯器，您可以使用它來測試事物，也可以檢查用Delphi編寫的代碼。

Answer 2

Eugene的回答很有幫助，但並不完全符合我的要求。 密碼復雜性過濾器實際上可以自定義，什么是好的方式來問Windows，這個密碼是否符合要求？

我花了一段時間找到它，但功能是NetValidatePasswordPolicy 。 這個函數的MSDN文檔非常糟糕; 請查看此MSDN博客條目 。

Answer 3

查詢ActiveDirectory僅適用於加入域的計算機; 並且用戶有能力查詢域控制器（這是可以取消授權的）。

@ NicholasWilson使用NetValidatePasswordPolicy的答案很好; 因為它可以為你做很多繁重的工作。 它甚至可以執行您必須自己重新實現的密碼質量檢查。 但是當使用salted哈希存儲密碼（例如BCrypt或Scrypt）時， NetValidatePasswordPolicy會檢查您的自定義密碼歷史記錄失敗。

但真正的問題是如何查詢當前機器（甚至是非域加入機器）的密碼策略。 您可以使用以下方式查詢：

NetUserModalsGet

struct USER_MODALS_INFO_0
{
    DWORD usrmod0_min_passwd_len;
    DWORD usrmod0_max_passwd_age;
    DWORD usrmod0_min_passwd_age
    DWORD usrmod0_force_logoff; 
    DWORD usrmod0_password_hist_len;
}
PUSER_MODALS_INFO_0 = ^USER_MODALS_INFO_0;    

PUSER_MODALS_INFO_0 info0;

NET_API_STATUS res = NetUserModalsGet(nil, 0,  out info0);

if (res <> NERR_Success)
   RaiseWin32Error(res);
try
   //Specifies the minimum allowable password length. 
   //Valid values for this element are zero through PWLEN.
   Log(info0.usrmod0_min_passwd_len);

   //Specifies, in seconds, the maximum allowable password age. 
   //A value of TIMEQ_FOREVER indicates that the password never expires. 
   //The minimum valid value for this element is ONE_DAY. 
   //The value specified must be greater than or equal to the value for the usrmod0_min_passwd_age member.
   Log(info0.usrmod0_max_passwd_age);

   //Specifies the minimum number of seconds that can elapse between the time
   //a password changes and when it can be changed again. 
   //A value of zero indicates that no delay is required between password updates. 
   //The value specified must be less than or equal to the value for the usrmod0_max_passwd_age member.
   Log(info0.usrmod0_min_passwd_age);

   //Specifies, in seconds, the amount of time between the end of the valid
   // logon time and the time when the user is forced to log off the network. 
   //A value of TIMEQ_FOREVER indicates that the user is never forced to log off. 
   //A value of zero indicates that the user will be forced to log off immediately when the valid logon time expires.
   Log(info0.usrmod0_force_logoff);

   //Specifies the length of password hi'+'story maintained. 
   //A new password cannot match any of the previous usrmod0_password_hist_len passwords. 
   //Valid values for this element are zero through DEF_MAX_PWHIST
   Log(info0.usrmod0_password_hist_len);
finally
   NetApiBufferFree(info0);
end;