Ok, consegui resolvê-lo.
Eu precisava de um link simbólico de /usr/local/etc/openlad/ldap.conf para /etc/ldap/ldap.conf
Atualizar
Eu consegui reproduzir o problema em uma escala menor usando um script php simples que tenta uma ligação LDAP. A partir desse script, recebi mais resultados de depuração, o que me permite identificar o problema real. Então estou reescrevendo esta questão.
Estou tentando configurar um ambiente LDAP no meu servidor Debian Wheezy.
Eu quero proteger a comunicação com o servidor usando um certificado SSL válido (ou seja, não é auto-assinado).
Eu estou usando uma versão auto-compilada do OpenLDAP porque a versão mais recente no repositório Debian não suporta hashes de senhas SHA2.
Eu posso usar este simples script PHP para tentar ligar ao meu servidor LDAP.
<?php
error_reporting(E_ALL);
ini_set('display_errors', 'On');
/* if I remove this, it doesn't work */
putenv('LDAPTLS_CACERT=/path/to/my/root.ca');
$uri='ldaps://localhost';
if (!ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, 7) ) {
die('log level option failed\n');
}
$ldap = ldap_connect($uri) or die ('connect failed');
if ( !ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3) ) {
die('protocol version set failed\n');
}
if ( !ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0) ) {
die('referrals option set failed\n');
}
$dn = 'cn=root,dc=domain,dc=tld';
$pw = '...';
$bind = ldap_bind($ldap, $dn, $pw);
if ($bind) {
echo 'bind succeeded\n';
} else {
echo 'bind failed\n';
}
ldap_close($ldap);
echo '<p>blubb</p>';
?>
A ligação falha e o script produz as seguintes mensagens no meu log de erros do apache:
ldap_create
ldap_url_parse_ext(ldaps://localhost)
ldap_bind_s
ldap_simple_bind_s
ldap_sasl_bind_s
ldap_sasl_bind
ldap_send_initial_request
ldap_new_connection 1 1 0
ldap_int_open_connection
ldap_connect_to_host: TCP localhost:636
ldap_new_socket: 20
ldap_prepare_socket: 20
ldap_connect_to_host: Trying 127.0.0.1:636
ldap_pvt_connect: fd: 20 tm: -1 async: 0
TLS: peer cert untrusted or revoked (0x42)
TLS: can't connect: (unknown error code).
ldap_err2string
Portanto, é obviamente um problema de certificado. Eu acho que a biblioteca php ldap, por algum motivo, não encontra / usa meu ldap.conf (que está localizado em /usr/local/etc/openldap ) e, portanto, não usa o TLS_CACERT fornecido lá.
Eu tentei fazer o symlinking /usr/local/etc/openldap/ldap.conf to /etc/openldap/ldap.conf , que normalmente é o local padrão. Isso infelizmente não funcionou também.
Atualizar Consegui fazê-lo funcionar colocando
putenv('LDAPTLS_CACERT=/path/to/my/root.ca');
dentro do meu script. Isso prova que o php não usa meu ldap.conf .
Seria uma solução razoável colocar essa variável de ambiente na minha configuração do phpldapadmin?
Outras ferramentas do cliente LDAP não php, como ldapsearch , funcionam perfeitamente.
Alguém tem uma idéia do que poderia fazer com que a biblioteca cliente ldap do php não encontre / use meu ldap.conf ?
cat /usr/local/etc/openldap/slapd.conf
include /usr/local/etc/openldap/schema/core.schema
include /usr/local/etc/openldap/schema/cosine.schema
include /usr/local/etc/openldap/schema/inetorgperson.schema
pidfile /var/run/slapd/slapd.pid
argsfile /var/run/slapd/slapd.args
# self-compiled to enable SHA2 password hash support
modulepath /usr/local/lib
moduleload pw-sha2.so
database bdb
suffix "dc=domain,dc=tld"
rootdn "cn=root,dc=domain,dc=tld"
cachesize 2000
# Use this command to generate a SHA512 hash:
# slappasswd -o module-path=/usr/local/lib -o module-load=pw-sha2.so -h "{SSHA512}"
rootpw {SSHA512}...
directory /var/ldap
mode 0600
# Indices to maintain
index objectClass eq
index cn pres,eq
###############################################################################
# Logging stuff
###############################################################################
loglevel 488
###############################################################################
# TLS stuff
###############################################################################
TLSCipherSuite ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS
TLSCertificateFile path to certificate file
TLSCertificateKeyFile path to key file
TLSCACertificateFile path to CA certificate file
TLSVerifyClient never
###############################################################################
# LDAP security stuff
###############################################################################
password-hash {SSHA512}
security update_tls=256 ssf=256
require authc bind
###############################################################################
# ACLs
###############################################################################
# enable users to change their own password. Everyone else can only use it for auth
#access to * by *
access to attrs=userPassword
by self write
by * auth
ps aux | grep slapd
ldap 4801 0.0 0.0 73612 7924 ? Ssl 07:19 0:00 /usr/local/bin/slapd -h ldaps://127.0.0.1:636 -g ldap -u ldap -f /usr/local/etc/openldap/slapd.conf
cat /usr/local/etc/openldap/ldap.conf
BASE dc=domain,dc=tld
URI ldaps://127.0.0.1:636
#TLS_REQCERT never
TLS_CACERT path to CA certificate file
<?php
$config->custom->debug['level'] = 255;
$config->custom->debug['syslog'] = true;
$config->custom->appearance['friendly_attrs'] = array(
'facsimileTelephoneNumber' => 'Fax',
'gid' => 'Group',
'mail' => 'Email',
'telephoneNumber' => 'Telephone',
'uid' => 'User Name',
'userPassword' => 'Password'
);
$config->custom->modify_member['attr'] = 'dn';
$servers = new Datastore();
$servers->newServer('ldap_pla');
$servers->setValue('server','name','domain.tld LDAP server');
/* according to documentation port must be provided in URI and server->port
* must be 0 when using ldaps
*/
$servers->setValue('server','host','ldaps://127.0.0.1:636');
$servers->setValue('server','port',0);
$servers->setValue('server','base',array('dc=domain,dc=tld'));
$servers->setValue('login','auth_type','session');
$servers->setValue('login','bind_id','cn=root,dc=domain,dc=tld');
/* no need to enable this, if ldap is running on port 636 with ldaps:// */
$servers->setValue('server','tls',false);
$servers->setValue('login','anon_bind',false);
?>
slapcat
dn: dc=domain,dc=tld
dc: domain
objectClass: dcObject
objectClass: organizationalUnit
structuralObjectClass: organizationalUnit
entryUUID: c2dc8e83-77a6-47ca-b245-f74636aca48f
creatorsName: cn=root,dc=domain,dc=tld
createTimestamp: 20140928123911Z
ou: domain.tld
entryCSN: 20140929080227.350590Z#000000#000#000000
modifiersName: cn=root,dc=domain,dc=tld
modifyTimestamp: 20140929080227Z
Para garantir que isso não seja um problema de configuração SSL, invoquei:
openssl s_client -connect localhost:636 -CAfile /path/to/CA_certificate.file -verify 5
CONNECTED(00000003)
depth=2 C = IL, O = StartCom Ltd., OU = Secure Digital Certificate Signing, CN = StartCom Certification Authority
verify return:1
depth=1 C = IL, O = StartCom Ltd., OU = Secure Digital Certificate Signing, CN = StartCom Class 1 Primary Intermediate Server CA
verify return:1
depth=0 description = BNw48VehLnkei38O, C = DE, CN = domain.tld, emailAddress = [email protected]
verify return:1
---
Certificate chain
0 s:/description=<stripped>/C=DE/CN=domain.tld/[email protected]
i:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Class 1 Primary Intermediate Server CA
1 s:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Class 1 Primary Intermediate Server CA
i:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority
2 s:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority
i:/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority
---
Server certificate
-----BEGIN CERTIFICATE-----
<stripped>
-----END CERTIFICATE-----
subject=/description=BNw48VehLnkei38O/C=DE/CN=domain.tld/[email protected]
issuer=/C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Class 1 Primary Intermediate Server CA
---
No client certificate CA names sent
---
SSL handshake has read 5739 bytes and written 891 bytes
---
New, TLSv1/SSLv3, Cipher is AES256-GCM-SHA384
Server public key is 4096 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1.2
Cipher : AES256-GCM-SHA384
Session-ID: <stripped>
Session-ID-ctx:
Master-Key: <stripped>
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
TLS session ticket lifetime hint: 300 (seconds)
TLS session ticket:
<stripped>
Start Time: 1412055431
Timeout : 300 (sec)
Verify return code: 0 (ok)
O ldapsearch funciona perfeitamente:
su www-data -c 'ldapsearch -H "ldaps://localhost" -b "dc=domain,dc=tld" -s base "dc=domain,dc=tld" -D "cn=root,dc=domain,dc=tld" -w"<stripped>" -v -d256'
ldap_initialize( ldaps://localhost:636/??base )
filter: dc=domain,dc=tld
requesting: All userApplication attributes
# extended LDIF
#
# LDAPv3
# base <dc=domain,dc=tld> with scope baseObject
# filter: dc=domain,dc=tld
# requesting: ALL
#
# search result
search: 2
result: 0 Success
# numResponses: 1
Estas são as versões dos pacotes de software relevantes que uso:
slapd -V
@(#) $OpenLDAP: slapd 2.4.39 (Sep 28 2014 22:28:35)
php --version
PHP 5.4.4-14+deb7u14 (cli) (built: Aug 21 2014 08:36:44)
apache2 -v
Server version: Apache/2.2.22 (Debian)
Server built: Jul 24 2014 15:34:00
cat /usr/share/phpldapadmin/VERSION
RELEASE-1.2.2
Desculpe por essa longa pergunta. Espero que alguém possa me ajudar, porque estou sem idéias. Muito obrigado por qualquer ajuda antecipadamente!