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AW: openldap and TLS certificates

To: nick kasparidis <nick.kasparidis@toumaz.com>
Subject: AW: openldap and TLS certificates
From: Hauke Coltzau <hauke.coltzau@FernUni-Hagen.de>
Date: Tue, 30 Sep 2008 02:10:16 +0200 (CEST)
Cc: openldap-technical <openldap-technical@openldap.org>
In-reply-to: <25850462.3751222733341505.JavaMail.root@knpc10>
Hi Nick,

it took me some time to set up TLS successfully, so I'm with
you in this journey ;-)

>From my own experience, I would suggest to start verfifying
the server first. Let the client simply have the

TLS_CACERT /<path>/<to>/<cachain>/cacert.chain.pem
TLS_REQCERT demand

options set and not send any certificate at all.
On the server's side, only set 

TLSCertificateFile /your/cert.pem
TLSCertificateKeyFile /your/private/key.pem

You will not need a CACert file on the server for now.

Make sure that the client will not send any certificate, so
check your current users .ldaprc, because the client certificate
depends on the user that runs the ldapsearch command.

If you can set up TLS this way, you can be sure that the
server is valid. To validate your client, you will need
a .ldaprc in the current user's home directory which points
to the user's cert and key. The server must be able to
verify the user's cert.

Hope, this helps,

Hauke


----- UrsprÃngliche Mail -----
Von: "Nick Kasparidis" <nick.kasparidis@toumaz.com>
An: openldap-technical@openldap.org
Gesendet: Montag, 29. September 2008 17:11:10 GMT +01:00 Amsterdam/Berlin/Bern/Rom/Stockholm/Wien
Betreff: openldap and TLS certificates

Hello everyone,
   I seem to have a problem with setting up secure connections with my
LDAP server. I believe the problem has mainly to do with my certificates
rather than anything else. I used the tutorial provided by the openLDAP
admin guide to generate my certificates
http://damncoolpics.blogspot.com/2008/09/oktoberfest-2008-in-munich.html

   My slapd.conf files has the following entries

#SSL/TLS Options
TLSCipherSuite		HIGH:MEDIUM
TLSCACertificateFile	/usr/local/etc/slapd-cacert.pem
TLSCertificateFile	/usr/local/etc/slapd-cert.pem
TLSCertificateKeyFile	/usr/local/etc/slapd-key.pem

and my ldap.conf
TLS_CACERTDIR /etc/openldap/cacerts
TLS_CACERT /etc/openldap/cacerts/slapd-cert.pem

slapd-cacert.pem is the certificate of the CA
slapd-cert.pem is the server certificate (same copy on client and
server)
slapd-key.pem is the server key (I manually removed the certificate
request that was generated by the process on the link above)

I start the server using /usr/local/libexec/slapd -h ldap:/// ( also
tried the -d 9 flag for debugging), and when I use ldapsearch I get the
following errors

(from the client)
ldapsearch -x -ZZ (I have most of the settings in my ldap.conf)

ldap_start_tls: Connect error (-11)
        additional info: error:14090086:SSL
routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

(from the server with the -d 9 flag)
I get load of stuff, but the important seems to be the following

TLS trace: SSL3 alert read:fatal:unknown CA
TLS trace: SSL_accept:failed in SSLv3 read client certificate A
TLS: can't accept.
TLS: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca
s3_pkt.c:1053
connection_read(12): TLS accept failure error=-1 id=0, closing

When I try a search without the -ZZ flag everything works fine. When I
created the certificates I tried different common names. I tried the ip
address, fully qualified name (as shown below), the short name, even my
name, but no luck. I have read the proper RFC but could not get
anyusefull information. By the way I have a local DNS server and the
domain name should match the correct IP address (and the reverse).

Truth is I do not know much about SSL and certificates, so I might be
missing something. Just for your information, The certificate authority
is the same with the LDAP server. I will provide the certificate below,
with email and addresses altered. Also the hashes have been altered so
key and cert will not match. I merely provide them just in case you see
something wrong in the syntax.

The server certificate

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 1 (0x1)
        Signature Algorithm: sha1WithRSAEncryption
        Issuer: C=GB, ST=Oxfordshire, O=Company, OU=IT,
CN=ldapserver.eng.mydomain.com/emailAddress=admin@mydomain.com
        Validity
            Not Before: Sep 29 09:49:07 2008 GMT
            Not After : Sep 29 09:49:07 2009 GMT
        Subject: C=GB, ST=Oxfordshire, L=Abingdon, O=Company,, OU=IT,
CN=ldapserver.eng.mydomain.com/emailAddress=admin@mydomain.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
            RSA Public Key: (2048 bit)
                Modulus (2048 bit):
                    00:c4:4d:49:ce:35:a6:80:67:d5:c5:ea:2e:5a:b0:
                    0f:96:a2:de:28:c3:97:fc:5d:9d:05:57:ae:a8:db:
                    d4:cd:8c:bb:1d:4d:2c:41:51:45:0e:c9:17:8f:a0:
                    5b:bb:a0:5e:d3:d7:5d:a4:64:dd:23:9a:64:ad:dc:
                    7b:49:5a:92:68:65:32:6c:0c:50:84:8a:75:26:da:
                    76:7f:65:13:14:0a:05:eb:5e:d3:f7:1e:89:7f:a2:
                    d8:1b:4a:46:28:ee:98:5f:f9:bd:21:88:df:76:5c:
                    b9:8e:7e:5b:09:29:65:e7:6b:a7:5b:5f:4a:99:77:
                    7d:6c:d1:44:7e:7a:77:05:fe:1c:b9:6d:2b:e2:57:
                    63:63:29:b3:cb:c6:68:35:b5:81:fa:ef:ee:ba:c0:
                    54:3e:d8:70:0a:f6:c9:39:74:21:f8:75:b9:08:89:
                    6a:5e:e3:fe:1e:5e:37:b0:29:2d:13:35:b4:7c:aa:
                    55:3e:c3:c4:59:cd:08:e1:ef:21:43:29:0f:82:8f:
                    84:7d:f2:65:b5:79:2e:fc:87:7c:7d:ca:fb:7a:ef:
                    54:c4:33:20:ed:f5:8a:64:de:60:18:60:07:ee:f9:
                    ea:0f:97:bf:af:63:e1:e4:e8:b2:15:1b:5f:95:fd:
                    ad:c7:83:8c:94:f3:e4:ef:95:63:f0:d4:a8:f8:49:
                    13:05
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints: 
                CA:FALSE
            Netscape Comment: 
                OpenSSL Generated Certificate
            X509v3 Subject Key Identifier: 

1F:9F:4E:5A:C8:61:53:4B:5F:50:28:84:F8:D7:45:54:C0:C9:7E:67
            X509v3 Authority Key Identifier: 

keyid:7C:5A:92:7E:5C:6B:3E:9B:0E:87:46:7C:FB:27:8F:34:AD:42:3B:27

    Signature Algorithm: sha1WithRSAEncryption
        04:3d:f9:64:e9:c1:13:8c:98:e6:b6:33:a9:e0:8b:8e:b0:68:
        2f:70:8e:8e:b4:b2:6f:61:7c:bd:63:f2:cb:20:b8:6e:4f:0a:
        53:5f:ba:ed:32:20:c7:31:24:0c:c3:e8:d6:42:1c:a8:3e:7b:
        32:b4:87:94:71:d6:8b:ca:c9:57:f5:9f:fc:8d:89:77:e2:3e:
        ac:49:cd:c8:c7:01:83:41:41:a6:05:7c:df:c6:37:0e:15:d8:
        d2:51:3f:a5:92:b7:bf:3f:65:4e:68:71:b7:4e:3e:26:f6:15:
        fe:38:72:e1:f9:b7:60:29:e8:ff:78:3c:aa:34:be:e8:46:f1:
        5f:87:8b:a1:60:8b:82:31:ca:5e:a1:31:83:e7:b7:90:be:a5:
        2f:ac:f7:1c:fe:af:89:15:02:af:c7:4f:2f:97:87:2b:0b:83:
        5c:07:83:f9:f9:c7:63:00:69:fa:c9:d0:fc:fb:7a:ef:7a:41:
        1c:e0:99:e4:01:73:7f:94:fa:2c:12:0f:8e:3f:8f:b4:9b:b6:
        85:42:90:1a:aa:d6:11:9b:49:db:83:f9:19:1e:dd:8b:0a:c7:
        b5:c0:5c:06:78:ca:f1:75:f9:8b:eb:c0:94:b0:3f:96:fc:b8:
        88:7c:52:46:ad:ab:bb:22:52:c1:31:dc:87:a7:c9:bd:de:98:
        bd:76:45:2b
-----BEGIN CERTIFICATE-----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&xdnQVXrqjb1M2cux1NLEFRRQ7J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-----END CERTIFICATE-----


The CA certificate

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 0 (0x0)
        Signature Algorithm: sha1WithRSAEncryption
        Issuer: C=GB, ST=Oxfordshire, O=Company, OU=IT,
CN=ldapserver.eng.mydomain.com/emailAddress=admin@mydomain.com
        Validity
            Not Before: Sep 29 09:48:17 2008 GMT
            Not After : Sep 29 09:48:17 2011 GMT
        Subject: C=GB, ST=Oxfordshire, O=Company, OU=IT,
CN=ldapserver.eng.mydomain.com/emailAddress=admin@mydomain.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
            RSA Public Key: (2048 bit)
                Modulus (2048 bit):
                    00:a6:6e:3b:1f:87:e9:1a:c9:e9:5c:3a:b8:96:19:
                    af:c9:e7:41:87:72:76:55:a8:fc:db:3c:05:55:9c:
                    25:8f:83:5b:35:05:9f:cb:7b:4e:9b:3a:84:98:60:
                    46:d5:79:be:c1:4c:b5:ea:cd:79:2b:c2:33:86:05:
                    67:98:e4:62:77:d7:cf:98:c3:52:93:6c:ba:1c:fc:
                    a3:f9:81:26:ea:d8:a1:56:cd:74:f5:47:fe:0f:8d:
                    95:7a:b7:8b:14:25:e7:9d:e2:e7:46:a2:d6:90:4c:
                    25:94:16:20:51:78:6a:68:da:e0:06:2c:45:4e:27:
                    c4:2b:8b:bc:a9:e2:fb:c5:c1:8b:9d:33:5f:e3:be:
                    d1:f5:53:9d:2b:0c:bf:2a:95:e6:57:29:5e:ef:ab:
                    3a:e9:33:09:00:c3:7d:94:aa:a9:b4:3c:08:9d:e8:
                    e6:92:f2:60:03:ed:12:1d:df:81:9f:a7:d2:81:7f:
                    3e:8b:fa:a4:01:ba:c1:49:1c:51:02:c6:54:3c:48:
                    9a:3f:18:54:04:35:c4:e1:c7:12:f6:7a:26:7e:47:
                    04:e6:f8:fc:ed:8c:2e:17:05:62:b6:73:9a:4e:52:
                    10:17:92:52:38:3a:4d:2d:32:ab:76:c8:61:ab:36:
                    cd:52:f9:95:bb:87:63:ad:5d:d3:d0:f9:6f:06:a6:
                    29:6f
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints: 
                CA:FALSE
            Netscape Comment: 
                OpenSSL Generated Certificate
            X509v3 Subject Key Identifier: 

7C:5A:92:7E:5C:5B:3E:9B:0E:87:46:7C:FB:27:8F:34:AE:42:3B:27
            X509v3 Authority Key Identifier: 

keyid:7C:5A:92:7E:5C:5B:3E:9B:0E:87:46:7C:FB:27:8F:34:AE:42:3B:27

    Signature Algorithm: sha1WithRSAEncryption
        2b:b9:65:09:2d:ff:c0:80:dd:e0:f4:d0:01:9a:87:b9:da:54:
        d2:f1:e4:0a:56:0b:cf:31:55:97:9f:93:62:df:59:3d:11:5b:
        06:6c:e7:f9:56:9b:c8:e8:e0:77:54:12:5b:ca:98:f9:c7:fa:
        c6:41:45:6d:14:31:2d:d6:19:a8:41:ba:89:55:5a:7f:5c:79:
        1b:05:36:d7:e4:00:7b:e7:ae:5e:56:74:12:f9:fa:ab:63:0f:
        f6:8e:97:cc:53:d3:91:7e:4b:48:6e:15:27:bc:73:4a:68:1f:
        ff:36:67:b2:fa:6b:38:40:0c:f2:99:5f:75:2a:4f:27:21:a8:
        fb:b5:9a:c3:7a:05:a5:45:03:3f:cf:85:21:eb:42:69:23:af:
        d5:b8:32:17:4e:a5:52:c2:3e:01:bd:1f:f2:1a:b6:f0:f8:8f:
        d9:d0:70:30:08:39:37:42:84:42:67:27:74:16:be:e7:2d:0f:
        54:e8:3d:8b:6f:6c:76:a6:39:d9:df:e4:b9:33:9a:92:5b:3e:
        b2:6a:8a:8f:2e:9c:3a:01:54:c7:3e:0e:f4:45:9c:bd:f6:39:
        e9:8c:9d:95:60:e7:2a:10:f6:ac:4a:a2:b7:16:bf:06:44:76:
        4b:5d:51:5a:0b:82:b0:53:f6:4a:d7:04:f0:85:7e:34:c6:fc:
        50:1a:c4:b3
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

and finally the server key, which I modified slightly be removing a
certificate request entry

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

Any ideas would be welcome

Best Regards
Nick


-- 
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      FernuniversitÃt in Hagen
   Lehrgebiet Kommunikationsnetze
   http://www.fernuni-hagen.de/kn

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