Remove the dreaded DN regex, instead validating DNs using the newly
defined `ldap-dn` schema format (which uses
Net::LDAP::Util::canonical_dn() under the hood).

Result of a previous discussion [0].

[0] https://lists.proxmox.com/pipermail/pve-devel/2023-May/056839.html

Signed-off-by: Christoph Heiss <c.he...@proxmox.com>
---
Needs a bump of libpve-common-perl due to the new 'ldap-dn' schema
format.

 src/PVE/Auth/LDAP.pm | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/PVE/Auth/LDAP.pm b/src/PVE/Auth/LDAP.pm
index fc82a17..e0ead1b 100755
--- a/src/PVE/Auth/LDAP.pm
+++ b/src/PVE/Auth/LDAP.pm
@@ -10,9 +10,6 @@ use PVE::Tools;

 use base qw(PVE::Auth::Plugin);

-my  $dn_part_regex = qr!("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ 
,+"/<>;=#])!;
-our $dn_regex = qr!\w+=${dn_part_regex}(,\s*\w+=${dn_part_regex})*!;
-
 sub type {
     return 'ldap';
 }
@@ -22,7 +19,7 @@ sub properties {
        base_dn => {
            description => "LDAP base domain name",
            type => 'string',
-           pattern => $dn_regex,
+           format => 'ldap-dn',
            optional => 1,
            maxLength => 256,
        },
@@ -36,7 +33,7 @@ sub properties {
        bind_dn => {
            description => "LDAP bind domain name",
            type => 'string',
-           pattern => $dn_regex,
+           format => 'ldap-dn',
            optional => 1,
            maxLength => 256,
        },
@@ -94,7 +91,7 @@ sub properties {
            description => "LDAP base domain name for group sync. If not set, 
the"
                ." base_dn will be used.",
            type => 'string',
-           pattern => $dn_regex,
+           format => 'ldap-dn',
            optional => 1,
            maxLength => 256,
        },
--
2.41.0



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