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POActive Directory - Check username / password
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  1. POActive Directory - Check username / password
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    copied!<p>I'm using the following code on Windows Vista Ultimate SP1 to query our active directory server to check the user name and password of a user on a domain.</p> <pre><code>public Object IsAuthenticated() { String domainAndUsername = strDomain + "\\" + strUser; DirectoryEntry entry = new DirectoryEntry(_path, domainAndUsername, strPass); SearchResult result; try { //Bind to the native AdsObject to force authentication. DirectorySearcher search = new DirectorySearcher(entry) { Filter = ("(SAMAccountName=" + strUser + ")") }; search.PropertiesToLoad.Add("givenName"); // First Name search.PropertiesToLoad.Add("sn"); // Last Name search.PropertiesToLoad.Add("cn"); // Last Name result = search.FindOne(); if (null == result) { return null; } //Update the new path to the user in the directory. _path = result.Path; _filterAttribute = (String)result.Properties["cn"][0]; } catch (Exception ex) { return new Exception("Error authenticating user. " + ex.Message); } return user; } </code></pre> <p>the target is using .NET 3.5, and compiled with VS 2008 standard</p> <p>I'm logged in under a domain account that is a domain admin where the application is running.</p> <p>The code works perfectly on windows XP; but i get the following exception when running it on Vista: </p> <pre><code>System.DirectoryServices.DirectoryServicesCOMException (0x8007052E): Logon failure: unknown user name or bad password. at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind() at System.DirectoryServices.DirectoryEntry.get_AdsObject() at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne) at System.DirectoryServices.DirectorySearcher.FindOne() at Chain_Of_Custody.Classes.Authentication.LdapAuthentication.IsAuthenticated() at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind() at System.DirectoryServices.DirectoryEntry.get_AdsObject() at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne) at System.DirectoryServices.DirectorySearcher.FindOne() at Chain_Of_Custody.Classes.Authentication.LdapAuthentication.IsAuthenticated() </code></pre> <p>I've tried changing the authentication types, I'm not sure what's going on.</p> <hr> <p><b>See also</b>: <a href="https://stackoverflow.com/questions/290548/c-validate-a-username-and-password-against-active-directory"><a href="https://stackoverflow.com/questions/290548/c-validate-a-username-and-password-against-active-directory">Validate a username and password against Active Directory?</a></a></p>
 

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