Hello everybody,

I'm just trying to set up a LDAPS server using my own certification authority, but the ldap server does not accept/understand my client certificate. Instead, the server sais:

TLS: can't accept: The peer did not send any certificate..

What I did:

1.) I set up LDAP without SSL/TLS to make sure that it is configured properly. This worked out fine so far, I can use ldapsearch, ldapadd, phpldapadmin ...

2.) I created a self signed certificate for my RootCA, used it to sign my ServerCA and used the ServerCA to sign the certificates for my ldap server and client.

The certificates of RootCA and ServerCA have been concatenated into one file <name of ca>.chain.crt

3.) Changed ldap.conf and slapd.conf as described below

4.) Tried to do an ldapsearch on the client -> failed

5.) Tried openssl client -> success

Here are the details:

Client: =======

# ldapsearch -x -LLL -ZZ -d 1

ldap_create 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 <serverip>:636 ldap_new_socket: 3 ldap_prepare_socket: 3 ldap_connect_to_host: Trying <serverip>:636 ldap_pvt_connect: fd: 3 tm: -1 async: 0 TLS: can't connect: A TLS packet with unexpected length was received.. ldap_err2string ldap_start_tls: Can't contact LDAP server (-1)

Server: ========

# slapd -VV @(#) $OpenLDAP: slapd 2.4.9 (Aug 1 2008 01:09:46) $ buildd@king:/build/buildd/openldap2.3-2.4.9/debian/build/servers/slapd

# slapd -h "ldaps://<ip>/" -u openldap -g openldap -d 127

... ... connection_get(13): got connid=32 connection_read(13): checking for input on id=32 tls_read: want=5, got=5 0000: 16 03 02 00 07 ..... tls_read: want=7, got=7 0000: 0b 00 00 03 00 00 00 ....... TLS: can't accept: The peer did not send any certificate.. connection_read(13): TLS accept failure error=-1 id=32, closing connection_closing: readying conn=32 sd=13 for close connection_close: conn=32 sd=13 daemon: removing 13

But if I use openssl s_client, I get a differnet result:

Client: =======

openssl s_client -showcerts -connect <serverfqdn>:636 \ -CAfile cacerts/<ca>.chain.crt -cert certs/<clientfqdn>.cert.pem \ -key private/<clientfqdn>.key.pem

CONNECTED(00000003) depth=2 /C=... verify return:1 depth=1 /C=... verify return:1 depth=0 /C=... verify return:1 --- Certificate chain 0 s:/C=... i:/C=... -----BEGIN CERTIFICATE----- <Certificate data> -----END CERTIFICATE----- --- Server certificate subject=/C=... issuer=/C=... --- Acceptable client certificate CA names /C=... /C=... --- SSL handshake has read 1806 bytes and written 4358 bytes --- New, TLSv1/SSLv3, Cipher is AES256-SHA Server public key is 2048 bit Compression: NONE Expansion: NONE SSL-Session: Protocol : TLSv1 Cipher : AES256-SHA Session-ID: F63D4DB4A918CC3BC8F8617AD49F6C6EFCB316203466EC91DBCF0C2E3700DE1E Session-ID-ctx: Master-Key: <master key> Key-Arg : None Start Time: 1219848938 Timeout : 300 (sec) Verify return code: 0 (ok) ---

And on server side, everything seems to be o.k. There is no error and the last lines of output are:

=> ldap_dn2bv(16) <= ldap_dn2bv(cn=<cn of client>,ou=<ou>,o=<o>,st=<st>,c=<c>)=0 daemon: activity on 1 descriptor daemon: activity on: daemon: epoll: listen=7 active_threads=0 tvp=zero daemon: epoll: listen=8 active_threads=0 tvp=zero

ldap.conf (partially) ---------------------

uri ldaps://132.176.4.6/ ssl yes tls_cacertfile /usr/lib/ssl/cacartes/<ca>.chain.crt tls_ciphers TLSv1 tls_cert /usr/lib/ssl/certs/<clientfqdn>.cert.pem tls_key /usr/lib/ssl/private/<clientfqdn>.key.pem

ldap.conf (partially) ---------------------

TLSCACertificateFile /usr/lib/ssl/certs/<ca>.chain.crt TLSCertificateFile /usr/lib/ssl/openldap/<serverfqdn>.cert.pem TLSCertificateKeyFile /usr/lib/ssl/openldap/private/<serverfqdn>.key.pem TLSVerifyClient demand

What did I do wrong?

Best regards,

Hauke Coltzau