Howard Chu wrote:

Simon Pichugin wrote:

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Hello, I have a question regarding libldap function ldap_install_tls().

If it fails, is it the right thing to call ldap_unbind_ext() after that?

Probably.

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If we call it, does it mean that ldap_install_tls() made a bind?

No.

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Or do we call ldap_install_tls() on the connection that is already bound?

That's not the usual way to do things, no. Most likely you should be using ldap_start_tls() instead.

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Sorry if the information is available somewhere, but I missed to find it.

Most likely ldap_install_tls() should never have been released as a public API. You can't use it correctly without coordinating with the server, which ldap_start_tls() already does. I suggest you forget that this function exists.

Hi,

thanks for the recommendation. We are currently using ldap_install_tls() after calling ldap_init_fd() with a file-descriptor connected to port 636 and a ldaps uri. Can ldap_start_tls() but used in this case as well? I had the assumption that sending the StartTLS exop at this state might confuse the server?

Thanks for your help.

bye, Sumit

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The only thing I found is that OpenLDAP server calls ldap_unbind_ext() in case of failure but maybe I miss something...

https://git.openldap.org/openldap/openldap/-/blob/master/servers/slapd/ba...

The code you reference is inside an #ifdef block whose comments state that the feature is unimplemented.

So again, don't use this function.

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Thank you, Simon