[pve-devel] [access-contorl] fix #2947 login name for the LDAP/AD realm can be case-insensitive

[Wolfgang Link <w.link@proxmox.com>]

This is an optional for LDAP and AD realm.
The default behavior is case-sensitive.

Signed-off-by: Wolfgang Link <w.link@proxmox.com>
---
 PVE/API2/AccessControl.pm | 20 ++++++++++++++++++++
 PVE/Auth/LDAP.pm          |  7 +++++++
 2 files changed, 27 insertions(+)

diff --git a/PVE/API2/AccessControl.pm b/PVE/API2/AccessControl.pm
index fd27786..4b4d0be 100644
--- a/PVE/API2/AccessControl.pm
+++ b/PVE/API2/AccessControl.pm
@@ -226,6 +226,25 @@ __PACKAGE__->register_method ({
     returns => { type => "null" },
     code => sub { return undef; }});
 
+sub lookup_username {
+    my ($username) = @_;
+
+    $username =~ /@(.+)/;
+
+    my $realm = $1;
+    my $domain_cfg = cfs_read_file("domains.cfg");
+    my $casesensitive = $domain_cfg->{ids}->{$realm}->{casesensitive} // 1;
+    my $usercfg = cfs_read_file('user.cfg');
+
+    if ($casesensitive == 0) {
+	foreach my $user_name (keys %{$usercfg->{users}}) {
+	    return $user_name if lc $username eq lc $user_name;
+	}
+    }
+
+    return $username;
+};
+
 __PACKAGE__->register_method ({
     name => 'create_ticket',
     path => 'ticket',
@@ -292,6 +311,7 @@ __PACKAGE__->register_method ({
 	my $username = $param->{username};
 	$username .= "\@$param->{realm}" if $param->{realm};
 
+	$username = lookup_username($username);
 	my $rpcenv = PVE::RPCEnvironment::get();
 
 	my $res;
diff --git a/PVE/Auth/LDAP.pm b/PVE/Auth/LDAP.pm
index 09b2202..75cce0f 100755
--- a/PVE/Auth/LDAP.pm
+++ b/PVE/Auth/LDAP.pm
@@ -129,6 +129,12 @@ sub properties {
 	    optional => 1,
 	    default => 'ldap',
 	},
+        casesensitive => {
+	    description => "username is case-sensitive",
+	    type => 'boolean',
+	    optional => 1,
+	    default => 1,
+	}
     };
 }
 
@@ -159,6 +165,7 @@ sub options {
 	group_classes => { optional => 1 },
 	'sync-defaults-options' => { optional => 1 },
 	mode => { optional => 1 },
+	casesensitive => { optional => 1 },
     };
 }
 
-- 
2.20.1