PHP8 ldap_bind : Error -1无法与LDAP服务器联系

Question

我在PHP8的almalinux 8.7上。用TLS测试ldapsearch是可以的。

ldapsearch -H ldap://xxxx -x -ZZ /etc/pki/tls/certs/xxxx.pem -D 'xxxxx' -w 'xxxx' -b 'cn=xxx,cn=users,dc=xxx,dc=xxxx'

但是ldap_bind找不到ldap服务器。错误-1。没有ldap_start_tls($ldap_con)；就可以了。

-编辑错误消息：

我遗漏了什么？

if(empty(!$_POST["password"]))
        {
        // Configuration pour interface PHP de notre annuaire LDAP
        $server = "ldap://xxx:389";
        $login =  $_POST['login'];
        $password = $_POST['password'];
        $basedn = 'dc=xxx,dc=xxx';
        $group = 'xxxxx';

        // Connexion à LDAP.
        echo "Connexion...
";
        $ldap_con=ldap_connect($server) or die('Could not connect to LDAP server.');
        ldap_set_option(NULL, LDAP_OPT_X_TLS_CERTFILE, "/etc/pki/tls/certs/xxx.pem");
        ldap_set_option(NULL, LDAP_OPT_X_TLS_KEYFILE, "/etc/pki/tls/private/xxx.key");
        ldap_set_option($ldap_con, LDAP_OPT_PROTOCOL_VERSION, 3);
        ldap_set_option($ldap_con, LDAP_OPT_REFERRALS, 0);
        ldap_set_option($ldap_con, LDAP_OPT_NETWORK_TIMEOUT, 10);
        ldap_start_tls($ldap_con);

        if (!@ldap_bind($ldap_con, $login . "@xxxx", $password))
                {
                // Ici on peut voir quelle est la vraie nature de l'erreur (commenter la redirection)
                 echo "Error:" . ldap_error($ldap_con) . "";
                 echo "Error number:" . ldap_errno($ldap_con) . "";
                 echo "Error:" . ldap_err2str(ldap_errno($ldap_con)) . "";
                // Rediriger quand erreur
                // header("Location: https://xxxxx?error=1");
                }
        else
                {
                echo("Login correct 
");

调试测试

>          $server = "ldap://xxxx:389";
>         $login =  "xxxx";
>         $password = "xxxx";
>         $basedn = 'dc=xxx,dc=com';
>         $group = 'xxxx';
> 
>         // Connexion à LDAP.
>         echo "Connexion...
";
>         $ldap_con=ldap_connect($server) or die('Could not connect to LDAP server.');
>         ldap_set_option(NULL, LDAP_OPT_X_TLS_CERTFILE, "/etc/pki/tls/certs/xxxx.pem");
>         ldap_set_option(NULL, LDAP_OPT_X_TLS_KEYFILE, "/etc/pki/tls/private/xxxx.key");
>         ldap_set_option($ldap_con, LDAP_OPT_PROTOCOL_VERSION, 3);
>                 ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7);
>         ldap_set_option($ldap_con, LDAP_OPT_REFERRALS, 0);
>         ldap_set_option($ldap_con, LDAP_OPT_NETWORK_TIMEOUT, 10);
>         ldap_start_tls($ldap_con);
> 
>         ldap_bind($ldap_con, $login . "@xxxx", $password) ?>

输出

> Connexion...
ldap_extended_operation_s ldap_extended_operation
> ldap_send_initial_request ldap_new_connection 1 1 0
> ldap_int_open_connection ldap_connect_to_host: TCP xxx:389
> ldap_new_socket: 4 ldap_prepare_socket: 4 ldap_connect_to_host: Trying
> xxxx:389 ldap_pvt_connect: fd: 4 tm: 10 async: 0 ldap_ndelay_on: 4 attempting to connect: connect errno: 115 ldap_int_poll: fd: 4 tm:
> 10 ldap_is_sock_ready: 4 ldap_ndelay_off: 4 ldap_pvt_connect: 0
> ldap_open_defconn: successful ldap_send_server_request ldap_result ld
> 0x55808231ec30 msgid 1 wait4msg ld 0x55808231ec30 msgid 1 (infinite
> timeout) wait4msg continue ld 0x55808231ec30 msgid 1 all 1
> ** ld 0x55808231ec30 Connections:
> * host: xxxx port: 389  (default)   refcnt: 2  status: Connected   last used: Mon Nov 28 11:31:12 2022
> 
> 
> ** ld 0x55808231ec30 Outstanding Requests:  * msgid 1,  origid 1, status InProgress    outstanding referrals 0, parent count 0   ld
> 0x55808231ec30 request count 1 (abandoned 0)
> ** ld 0x55808231ec30 Response Queue:    Empty   ld 0x55808231ec30 response count 0 ldap_chkResponseList ld 0x55808231ec30 msgid 1 all 1
> ldap_chkResponseList returns ld 0x55808231ec30 NULL ldap_int_select
> read1msg: ld 0x55808231ec30 msgid 1 all 1 read1msg: ld 0x55808231ec30
> msgid 1 message type extended-result read1msg: ld 0x55808231ec30 0 new
> referrals read1msg:  mark request completed, ld 0x55808231ec30 msgid 1
> request done: ld 0x55808231ec30 msgid 1 res_errno: 0, res_error: <>,
> res_matched: <> ldap_free_request (origid 1, msgid 1)
> ldap_parse_extended_result ldap_parse_result ldap_msgfree TLS trace:
> SSL_connect:before SSL initialization TLS trace: SSL_connect:SSLv3/TLS
> write client hello TLS trace: SSL_connect:error in SSLv3/TLS write
> client hello ldap_int_tls_start: ldap_int_tls_connect needs read
> ldap_int_poll: fd: 4 tm: 10 ldap_is_sock_ready: 4 ldap_ndelay_off: 4
> TLS trace: SSL_connect:SSLv3/TLS write client hello TLS trace:
> SSL_connect:SSLv3/TLS read server hello TLS certificate verification:
> depth: 1, err: 0, subject: /DC=com/DC=xxx/CN=xxxx, issuer:
> /DC=com/DC=xx/CN=xx-CA TLS certificate verification: depth: 0,
> err: 0, subject: , issuer: /DC=com/DC=xxx/CN=xxxx TLS trace:
> SSL_connect:SSLv3/TLS read server certificate TLS trace:
> SSL_connect:SSLv3/TLS read server key exchange TLS trace:
> SSL_connect:SSLv3/TLS read server certificate request TLS trace:
> SSL_connect:SSLv3/TLS read server done TLS trace:
> SSL_connect:SSLv3/TLS write client certificate TLS trace:
> SSL_connect:SSLv3/TLS write client key exchange TLS trace:
> SSL_connect:SSLv3/TLS write certificate verify TLS trace:
> SSL_connect:SSLv3/TLS write change cipher spec TLS trace:
> SSL_connect:SSLv3/TLS write finished TLS trace: SSL_connect:error in
> SSLv3/TLS write finished ldap_int_tls_start: ld 0x55808231ec30 9 s
> 976966 us to go ldap_int_tls_start: ldap_int_tls_connect needs read
> ldap_int_poll: fd: 4 tm: 9 ldap_is_sock_ready: 4 ldap_ndelay_off: 4
> TLS trace: SSL_connect:SSLv3/TLS write finished TLS trace:
> SSL_connect:SSLv3/TLS read change cipher spec TLS trace:
> SSL_connect:SSLv3/TLS read finished ldap_sasl_bind_s ldap_sasl_bind
> ldap_send_initial_request ldap_send_server_request ldap_result ld
> 0x55808231ec30 msgid 2 wait4msg ld 0x55808231ec30 msgid 2 (infinite
> timeout) wait4msg continue ld 0x55808231ec30 msgid 2 all 1
> ** ld 0x55808231ec30 Connections:
> * host: xxxx port: 389  (default)   refcnt: 2  status: Connected   last used: Mon Nov 28 11:31:12 2022
> 
> 
> ** ld 0x55808231ec30 Outstanding Requests:  * msgid 2,  origid 2, status InProgress    outstanding referrals 0, parent count 0   ld
> 0x55808231ec30 request count 1 (abandoned 0)
> ** ld 0x55808231ec30 Response Queue:    Empty   ld 0x55808231ec30 response count 0 ldap_chkResponseList ld 0x55808231ec30 msgid 2 all 1
> ldap_chkResponseList returns ld 0x55808231ec30 NULL ldap_int_select
> read1msg: ld 0x55808231ec30 msgid 2 all 1 read1msg: ld 0x55808231ec30
> msgid 2 message type bind read1msg: ld 0x55808231ec30 0 new referrals
> read1msg:  mark request completed, ld 0x55808231ec30 msgid 2 request
> done: ld 0x55808231ec30 msgid 2 res_errno: 0, res_error: <>,
> res_matched: <> ldap_free_request (origid 2, msgid 2)
> ldap_parse_result ldap_msgfree ldap_free_connection 1 1
> ldap_send_unbind TLS trace: SSL3 alert write:warning:close notify
> ldap_free_connection: actually freed

<#>编辑

启动了一个strace ps awux | grep sbin/httpd | awk '{print"-p " $2}' | xargs strace -f，但没什么值得注意的。

php strace -f $(pidof php-fpm | sed 's/\([0-9]*\)/\-p \1/g')的Strace

[pid 340925] openat(AT_FDCWD, "/etc/pki/tls/private/xxx.key", O_RDONLY) = -1 EACCES (Permission non accordée)
[pid 340925] write(2, "TLS: could not use key file `/et"..., 70) = 70
[pid 340925] write(2, "TLS: error:0200100D:system libra"..., 85) = 85
[pid 340925] write(2, "TLS: error:20074002:BIO routines"..., 80) = 80
[pid 340925] write(2, "TLS: error:140B0002:SSL routines"..., 90) = 90

文件/var/log/php-fpm/www-error.log

[30-Nov-2022 08:00:01 UTC] PHP Warning:  ldap_start_tls(): Unable to start TLS: Connect error in /var/www/html/SI/test2.php on line 17
[30-Nov-2022 08:00:01 UTC] PHP Warning:  ldap_bind(): Unable to bind to server: Can't contact LDAP server in /var/www/html/SI/test2.php on line 37

谢谢

Answer 1

找到了。非常感谢“Fiisch”。

解决方案：-rw-r-----. 1 root apache 3272 28 nov. 11:35 xx.key

它是作为根用户工作，而不是作为apache工作。只是个问题，够安全吗？

Answer 2

StartTLS和TLS之间可能有些混淆，这是两个不同的东西。

使用StartTLS时，您连接到明文端口(389/tcp用于LDAP)，然后发出启动加密传输的命令。当您调用ldapsearch -ZZ ...时，这意味着您正在调用StartTLS。

当使用"real“SSL/TLS时，连接到加密端口( LDAP默认为636/tcp)，加密通道被设置，然后LDAP协议通信开始生效。

因此，您要么在PHP代码中缺少一些选项来使StartTLS工作，要么您应该使用ldaps://hostname/作为您的LDAP。

编辑：尽管实际上是正确的，但根本原因似乎并不在于TLS-StartTLS的混淆。ldap_start_tls() PHP例程可能实际上调用StartTLS，因此OP对389/tcp的使用是正确的。