[Date Prev][Date Next]
[Chronological]
[Thread]
[Top]
Re: Using Arbitrary X509 certificates for LDAPS authentication
Stephen Cartwright wrote:
Hi there,
Are there any restrictions on the DN or other attributes of
credentials used for LDAP authentication?
We are using grid credentials (X509 format) with DNs like this:
issuer= /C=CA/O=Grid/CN=Grid Canada Certificate Authority
subject= /C=CA/O=Grid/CN=host/somehost.somedomain.ca
"somehost.somedomain.ca" is not a valid RDN. RDNs require both a type and a
value, but here you have only a value. Whatever CA software you're using is
broken if it's allowing you to create certificates like this.
When I use some grid certs (X509 format) I see this message in the debug
output from slapd:
connection_read(10): unable to get TLS client DN error=49 id=3
When I try to connect, I get this:
ldap_initialize( ldaps://somehost.somedomain.ca )
ldap_bind: Can't contact LDAP server
The openssl command to create a connection works OK:
CONNECTED(00000003)
---
Certificate chain
0 s:/C=CA/O=Grid/CN=host/somehost.somedomain.ca
i:/C=CA/O=Grid/CN=Grid Canada Certificate Authority
1 s:/C=CA/O=Grid/CN=Grid Canada Certificate Authority
i:/C=CA/O=Grid/CN=Grid Canada Certificate Authority
---
Server certificate
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
subject=/C=CA/O=Grid/CN=host/somehost.somedomain.ca
issuer=/C=CA/O=Grid/CN=Grid Canada Certificate Authority
---
No client certificate CA names sent
---
SSL handshake has read 2083 bytes and written 320 bytes
---
New, TLSv1/SSLv3, Cipher is DES-CBC3-SHA
Server public key is 1024 bit
SSL-Session:
Protocol : TLSv1
Cipher : DES-CBC3-SHA
Session-ID:
43B46528E848663E7C8E9CAAEA4E6DB5E4A9675C05C3066DBD826CD1CF59A566
Session-ID-ctx:
Master-Key:
A8245A0731BA98F0D88821346432868C392FEE3F23EAFB9F356A34CB6BB663FC0892374118F280D6284C8E2ACAC3
Key-Arg : None
Start Time: 1251330160
Timeout : 300 (sec)
Verify return code: 0 (ok)
When I use certs created by us with another DN format such as this:
subject= /C=CA/ST=Province/L=Town/O=Organization/OU=Unit/CN=somehost.somedomain.ca/emailAddress=email@somewhere.ca
issuer= /C=CA/ST=Province/O=Organization/OU=Town/CN=Our
CA/emailAddress=email@somewhere.ca
And then make no other changes to the config other than pointing
everything to the new commands I can make a connection.
Any suggestions? Please advise.
Steve
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/