Otdfbt

I can successfully connect and search to an Active Directory domain controller using ldapsearch. I am using the -x option, to specify a username/password authentication (password being specified by -W and username by -D).

I currently need to dump directory from a MIT-kerberos domain. Kerberos is the only protocol available for authentication. I can retrieve a kerberos TGT ticket with kinit. I am using these command lines:

ldapsearch -Y SASL -b "REALM.INC" -H ldap://kerberos_IP_address
-> ldap_sasl_interactive_bind_s: Unknown authentication method (-6)
 additional info: SASL(-4): no mechanism available: No worthy mechs found

ldapsearch -o "mech=GSSAPI" ...
-> Invalid general option name: mech

How can I authenticate with kerberos using ldapsearch?

Many thanks for your help&replies

-Y is used to specify the SASL mechanism, which will probably be GSSAPI, though could be GSS-SPNEGO. Also, base dn must be in dn syntax (i.e., dc=example,dc=com), not domain syntax (example.com).

$ ldapsearch -x -b '' -s base supportedSASLMechanisms -H ldap://192.0.2.1/
dn:
supportedSASLMechanisms: GSSAPI

$ ldapsearch -Y GSSAPI -b dc=example,dc=com -H ldap://192.0.2.1/

$ ldapsearch -x -b '' -s base supportedSASLMechanisms -H ldap://192.0.2.2/
dn:
supportedSASLMechanisms: GSS-SPNEGO
supportedSASLMechanisms: GSSAPI

depending on your ldapsearch & OS version, you can try to first authenticate to kerberos using kinit and "cache" your ticket, use it in a kerberos env variable, and then let ldapsearch use this variable, with something like this :

kinit -c /tmp/<yourlogin>.cc.tmp <yourlogin>
export KRB5CCNAME=/tmp/<yourlogin>.cc.tmp
ldapsearch -Tx -h <host> -p <port> -Y GSSAPI -b "dc=example,dc=com" cn=*