Provided by: krb5-doc_1.10+dfsg~beta1-2_all
.k5identity - Kerberos V5 client principal selection rules
The .k5identity file, which resides in a user's home directory,
contains a list of rules for selecting a client principals based on the
server being accessed. These rules are used to choose a credential
cache within the cache collection when possible.
Blank lines and lines beginning with '#' are ignored. Each line has
principal field=value ...
If the server principal meets all of the field constraints, then
principal is chosen as the client principal. The following fields are
realm If the realm of the server principal is known, it is matched
against value, which may be a pattern using shell wildcards.
For host-based server principals, the realm will generally only
be known if there is a domain_realm section in krb5.conf with a
mapping for the hostname.
If the server principal is a host-based principal, its service
component is matched against value, which may be a pattern using
host If the server principal is a host-based principal, its hostname
component is converted to lower case and matched against value,
which may be a pattern using shell wildcards.
If the server principal matches the constraints of multiple lines in
the .k5identity file, the principal from the first matching line is
used. If no line matches, credentials will be selected some other way,
such as the realm heuristic or the current primary cache.
The following example .k5identity file selects the client principal
alice@KRBTEST.COM if the server principal is within that realm, the
principal alice/root@EXAMPLE.COM if the server host is within a servers
subdomain, and the principal alice/mail@EXAMPLE.COM when accessing the
IMAP service on mail.example.com.
alice/mail@EXAMPLE.COM host=mail.example.com service=imap