I have my Ldap working the only issue i'm facing was when I try to login with email that is when I land in the else part in the below code. If my username is different from email then it throws error. i.e if my email is 'skumar#gmail.com' and my username is 'saurakumar' then it will through invalid username password error.
As internally I'm using username to make email i.e if the user login with name 'karan' then i'm expecting the email to be karan #gmail.com which is not true in many scenario and the Authentication fails. I'm looking for some solution wherein I can login either via email or via username I'll be able to authenticate user. Below is the snippet of my code. Please suggest?
ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY, initialContextFactory);
ldapEnv.put(Context.PROVIDER_URL, url);
ldapEnv.remove(Context.SECURITY_PROTOCOL);
if (email == null) {
lContext = new InitialLdapContext(ldapEnv, null);
entryResult = searchUserEntry(lContext, user, searchCtrls);
final String usrDN = ((Context) entryResult.getObject()).getNameInNamespace();
lContext.addToEnvironment(Context.SECURITY_AUTHENTICATION, "simple");
lContext.addToEnvironment(Context.SECURITY_PRINCIPAL, usrDN);
lContext.addToEnvironment(Context.SECURITY_CREDENTIALS, pass);
lContext.reconnect(null);
} else {
ldapEnv.put(Context.SECURITY_PRINCIPAL, email);
ldapEnv.put(Context.SECURITY_CREDENTIALS, credentials);
lContext = new InitialLdapContext(ldapEnv, null);
return lContext;
searchUserEntry(lContext, user, searchCtrls);
}
Normally this is a 3-step process:
Bind to LDAP as an administrative user. Note that this should not be the master user defined in the configuration file: that's for OpenLDAP's use itself. Instead it should be a user mentioned in the DIT that has the appropriate search access for the next step.
Search for the user via some unique attribute, e.g. in your case email.
Using the found DN of the user and the password he specified, attempt to bind as that user (with the reconnect() method, after changing the environment of the context appropriately).
If all that succeeds, you have a login success. If (2) or (3) fail, you have a failure, and note that you should not tell the user which it was: otherwise you are leaking information to attackers. You should not mention whether it was the username (email) or the password that was wrong.
I am trying to use ldap for a flask application .
The app.config['LDAP_PROVIDER_URL'] = 'ldaps://appauth.corp.domain.com:636'
(I have replaced the domain for the original name here)
In another script in need the following ldap details
conn.simple_bind_s(
'cn=%s,ou=Users,dc=corp,dc=domain,dc=com' % username,
password
)
How do I find the OU,or can i ignore OU and drop it from above. Please let me know if other parameters are correct. I don't know LDAP
The general idea is that you bind as an application account with search privileges to locate the user account, e.g. by his email address, displayName, etc., and then use that DN to rebind using the password he supplied.
I would like to use an email address as the UserName. I can "/register" with only Email and Password (UserName is Nullable in the AuthUser table), but cannot then "/authenticate" because UserName is NULL. If I copy Email over to UserName in the AuthUser table, I can successfully "/authenticate".
The problem is that an email address has invalid characters according to the validation RegEx in the IsValidUsername method of the AuthFeatureExtensions class and so, you can't "/register" with UserName = email address.
I'm stuck on how to override that if possible?
Thanks,
Jay
ServiceStack Authentication already naturally supports authenticating by Email. When you authenticate with a Username that contains a '#' the ServiceStack will check the Email field instead of the Username.
So don't copy anything over, when you register just leave the Email in the Email field and the Username blank and it will work.
I am new to LDAP API. I am able to connect to a LDAP server and search the user. How would I authenticate a user with email/password using UnboundID LDAP API ?
I have not seen any authentication in LDAP which uses email and password to authenticate user?
Is it Possible to authenticate the user using email and password
What I am doing to authenticate the user given as below
Searching below the USERS Directory and matching Email and Finding his DN
Based on DN connecting the user and if Connection Successful, Authenticate the user or Execption occurs in Connecting then user is not Authenticated
Is there right way to authenticate the User?
You have to do two steps.
Using an administrative login, search the directory for the user.
Using that user's DN and the password he supplied, attempt to bind.
If either didn't succeed, either the identity or the password is incorrect.
Using the UnboundID LDAP SDK, this simple piece of code searches for the entry. If there is one entry that has the known email address, BIND using that DN (the password has to come from someplace else). Nothing happens (authenticated is false) is there is more one entry that matches the search parameters or if no entries match the search parameters. This code assumes that baseObject is dc=example,dc=com, subtree search is required, and the attribute with the email address has an alias mail. The code also assumes there is a bindDN and bindPassword that has sufficient access rights to search for the user with the email address. The email address for which it searches is assumed to be babs.jensen#example.com.
Exceptions are ignored throughout.
String baseObject = "dc=example,dc=com";
String bindDN = "dn-with-permission-to-search";
String bindPassword = "password-of-dn-with-permission-to-search";
// Exceptions ignored.
LDAPConnection ldapConnection =
new LDAPConnection(hostname,port,bindDN,bindPassword);
String emailAddress = "babs.jensen#example.com";
String filterText = String.format("mail=%s",emailAddress);
SearchRequest searchRequest = new SearchRequest(baseObject,
SearchScope.SUB,filterText,"1.1");
SearchResult searchResult = ldapConnection.search(searchRequest);
boolean authenticated = false;
if(searchResult.getEntryCount() == 1)
{
// There is one entry with that email address
SearchResultEntry entry = searchResult.getSearchEntries().get(0);
// Create a BIND request to authenticate. The password has
// has to come from someplace outside this code
BindRequest bindRequest =
new SimpleBindRequest(entry.getDN(),password);
ldapConnection.bind(bindRequest);
authenticated = true;
}
else if(searchResult.getEntryCount() > 1)
{
// more than one entry matches the search parameters
}
else if(searchResult.getEntryCount() == 0)
{
// no entries matched the search parameters
}
In case of LDAP authenticaion, what are the parameters that are generally used for authentication. I guess using DN would be a headache for users logging in via ldap because it is too large to remember.
How is the option of using uid or sAMAccountName for authentication where in my implementation, I retrieve the dn of the corresponding uid or sAMAccountName and proceed to authentication.
Am I going the right track?
In LDAP, a connection or session can be authenticated. When an LDAP client makes a new connection to an LDAP directory server, the connection has an authorization state of anonymous. The LDAP client can request that the authorization state be changed by using the BIND request.
A BIND request has two forms: simple and SASL. Simple uses a distinguished name and a password, SASL uses one of a choice of mechanisms, for example, PLAIN, LOGIN, CRAM-MD5, DIGEST-MD5, GSSAPI, and EXTERNAL - all of which except for GSSAPI and EXTERNAL are too weak to use in production scenarios or mission-critical areas.
To Use the simple BIND, construct a BIND request and transmit it to the LDAP directory server. The LDAP directory server will respond with a BIND response in which is contained a result code. The result code is an integer, anything other zero indicates that the BIND request failed. If the result code is zero, the BIND request succeeded and the session authorization state has been changed to that of the distinguished name used in the BIND request.
Each subsequent BIND request on the same connection/session causes the authorization state to be set to anonymous and each successive successful BIND request on the same connection/session causes the authorization state to be set to the authorization state associated with the authentication ID, which is the distinguished name in the case of the simple BIND, but might be something else entirely where SASL is used - modern professional quality servers can map the incoming names to different DNs.
Whichever language is used, construct a BIND request, transmit it to the server, and interpret the response.
Update:
If the distinguished name is not known, or is too cumbersome (often the case with web application users who don't know how they are authenticated and would not care if they did know), the LDAP application should search the directory for the user. A successful search response always contains the distinguished name, which is then used in a simple BIND.
The search contains at a minimum, the following:
base object: a distinguished name superior to the user, for example, dc=example,dc=com
a scope: base level, one level below base, or subtree below base. For example, if users are located subordinate to ou=people,dc=example,dc=com, use base object ou=people,dc=example,dc=com and a scope of one-level. These search parameters find entries like: uid=user1,ou=people,dc=example,dc=com
a filter: narrows down the possible search results returned to the client, for example (objectClass=inetOrgPerson)
a list of requested attributes: the attributes from an entry to return to the client. In this case, use 1.1, which means no attributes and returns on the DN (distinguished name), which is all that is required for the simple BIND.
see also
the links in the about section here
LDAP servers only understand LDAP queries; they don't have "usernames" like you and I are used to.
For LDAP, to authenticate someone, you need to send a distinguished name of that person's (or entity's) entry in LDAP; along with their password.
Since you mentioned sAMAccountName I am assuming you are working with Active Directory. Active Directory allows anonymous binds - this means you can connect to it without providing any credentials; but cannot do any lookups without providing credentials.
If you are using python-ldap and Cython (and not IronPython which has access to the various .NET APIs that make this process very easy); then you follow these steps.
Typically you use a pre-set user that has appropriate rights to the tree, and connect to the directory with that user first, and then use that user's access for the rest of the authentication process; which generally goes like this:
Connect to AD with the pre-set user.
Query active directory with the pre-set user's credentials and search for the distinguished name based on the sAMAccountName that the user will enter as their "username" in your form.
Attempt to connect again to Active Directory using the distinguished name from step 2, and the password that the user entered in their form.
If this connection is successful, then the user is authenticated.
So you need two main things:
The login attribute (this is the "username" that LDAP understands)
A LDAP query that fetches information for your users
Following is some rough code that can do this for you:
AD_USER = 'your super user'
AD_PASSWORD = 'your super user password'
AD_BIND_ATTR = 'userPrincipalName' # this is the "login" for AD
AD_URL = "ldap://your-ad-server"
AD_DN = "DC=DOMAIN,DC=COM"
AD_LOGIN_ATTR = 'sAMAccountName' # this is what you user will enter in the form
# as their "login" name,
# this is what they use to login to Windows
# A listing of attributes you want to fetch for the user
AD_ATTR_SEARCH = ['cn',
'userPrincipalName',
'distinguishedName',
'mail',
'telephoneNumber','sAMAccountName']
def _getbinduser(user):
""" This method returns the bind user string for the user"""
user_dn = AD_DN
login_attr = '(%s=%s)' % (AD_LOGIN_ATTR,user)
attr_search = AD_ATTR_SEARCH
conn = ldap.initialize(AD_URL)
conn.set_option(ldap.OPT_REFERRALS,0)
conn.set_option(ldap.OPT_PROTOCOL_VERSION,3)
try:
conn.bind(AD_USER,AD_PASSWORD)
conn.result()
except:
exceptionType, exceptionValue, exceptionTraceback = sys.exc_info()
# Exit the script and print an error telling what happened.
sys.exit("LDAP Error (Bind Super User)\n ->%s" % exceptionValue)
try:
result = conn.search_s(user_dn,
ldap.SCOPE_SUBTREE,
login_attr, attr_search)
except:
exceptionType, exceptionValue, exceptionTraceback = sys.exc_info()
# Exit the script and print an error telling what happened.
sys.exit("LDAP Error (Search)\n ->%s" % exceptionValue)
# Return the user's entry from AD, which includes
# their 'distinguished name'
# we use this to authenticate the credentials the
# user has entered in the form
return result[0][1]
def authenticate(user,password):
bind_attr = AD_BIND_ATTR
user_dn = AD_DN
login_attr = '(%s=%s)' % (AD_LOGIN_ATTR,user)
data = _getbinduser(user)
if len(data) == 1:
return None
# Information we want to return from the directory
# for each user, season to taste.
info = {}
info['name'] = data['cn'][0]
info['email'] = data['mail'][0]
try:
info['phone'] = data['telephoneNumber'][0]
except KeyError:
info['phone'] = 'Not Available'
conn = ldap.initialize(Config.AD_URL)
conn.set_option(ldap.OPT_REFERRALS,0)
conn.set_option(ldap.OPT_PROTOCOL_VERSION,3)
try:
# Now we have the "bind attribute" (LDAP username) for our user
# we try and connect to see if LDAP will authenticate
conn.bind(data[bind_attr][0],password)
conn.search(user_dn,ldap.SCOPE_SUBTREE,login_attr,None)
conn.result()
return info
except (ldap.INVALID_CREDENTIALS,ldap.OPERATIONS_ERROR):
return None
One small expansion on Terry's excellent comment. If you store all your users in the same part of the DIT, and use the same attribute to identify them, you can programmatically construct the DN, rather than searching for it.