Most tests here relies on the availability of an LDAP server configured with TLS.

Client/Server configuration:
===========================================================
OpenLDAP 2.4.31 has been used with the configuration below.

Notes:
1.  A self signed certificate can be generated using:
    $ openssl req -newkey rsa:1024 -x509 -nodes -out server.pem -keyout server.pem -days 3650
    It is used for testing ldap_start_tls(), which also requires "TLS_REQCERT never" in client configuration
2.  An empty LDAP structure is required for the tests to be PASSed (except for base and admin)

If you use a debian based distribution, prefer the use of dpkg-reconfigure.
Otherwise you may alter these configuration files:

(/etc/openldap/)slapd.conf:
-----------------------------------------------------------
TLSCACertificateFile /etc/openldap/ssl/server.pem
TLSCertificateFile /etc/openldap/ssl/server.pem
TLSCertificateKeyFile /etc/openldap/ssl/server.pem
TLSVerifyClient never

# hdb is used instead of bdb as it enables the usage of referrals & aliases
database        hdb
suffix          "dc=my-domain,dc=com"
checkpoint      32      30
rootdn          "cn=Manager,dc=my-domain,dc=com"
rootpw          secret
directory       /var/lib/openldap-data
index   objectClass     eq

authz-regexp
	uid=Manager,cn=digest-md5,cn=auth
	cn=Manager,dc=my-domain,dc=com


(/etc/openldap/)ldap.conf:
-----------------------------------------------------------
TLS_REQCERT never

Tests configuration:
===========================================================
The following environment variables may be defined:
LDAP_TEST_HOST (default: localhost)                        Host to connect to
LDAP_TEST_PORT (default: 389)                              Port to connect to
LDAP_TEST_BASE (default: dc=my-domain,dc=com)              Base to use. May be the ldap root or a subtree. (ldap_search_variation6 will fail if a subtree is used)
LDAP_TEST_USER (default: cn=Manager,dc=my-domain,dc=com)   DN used for binding
LDAP_TEST_SASL_USER (default: Manager)                     SASL user used for SASL binding
LDAP_TEST_PASSWD (default: secret)                         Password used for plain and SASL binding
LDAP_TEST_OPT_PROTOCOL_VERSION (default: 3)                Version of LDAP protocol to use
LDAP_TEST_SKIP_BIND_FAILURE (default: true)                Whether to fail the test or not in case binding fails

Credits:
===========================================================
Davide Mendolia <idaf1er@gmail.com>
Patrick Allaert <patrick.allaert@gmail.com>
Côme Bernigaud <mcmic@php.net>