KVNO(1)

NAME
kvno - print key version numbers of Kerberos principals

SYNOPSIS

kvno [-c ccache] [-e etype] [-k keytab] [-q] [-u | -S sname] [-P] [--cached-only] [--no-store] [--out-cache cache] [[{-F cert_file | {-I | -U} for_user} [-P]] | --u2u ccache] service1 service2 ...

DESCRIPTION

kvno acquires a service ticket for the specified Kerberos principals and prints out the key version numbers of each.

OPTIONS

-c ccache
    Specifies the name of a credentials cache to use (if not the default)

-e etype
    Specifies the enctype which will be requested for the session key of all the services named on the command line. This is useful in certain backward compatibility situations.

-k keytab
    Decrypt the acquired tickets using keytab to confirm their validity.

-q  Suppress printing output when successful. If a service ticket cannot be obtained, an error message will still be printed and kvno will exit with nonzero status.

-u  Use the unknown name type in requested service principal names. This option Cannot be used with -S.

-P  Specifies that the service1 service2 ... arguments are to be treated as services for which credentials should be acquired using constrained delegation. This option is only valid when used in conjunction with protocol transition.

-S sname
    Specifies that the service1 service2 ... arguments are interpreted as hostnames, and the service principals are to be constructed from those hostnames and the service name sname. The service hostnames will be canonicalized according to the usual rules for constructing service principals.

-I for_user
    Specifies that protocol transition (S4U2Self) is to be used to acquire a ticket on behalf of for_user. If constrained delegation is not requested, the service name must match the credentials cache client principal.

-U for_user
    Same as -I, but treats for_user as an enterprise name.

-F cert_file
    Specifies that protocol transition is to be used, identifying the client principal with the X.509 certificate in cert_file. The certificate file must be in PEM format.

--cached-only
    Only retrieve credentials already present in the cache, not from the KDC. (Added in release 1.19.)

--no-store
    Do not store retrieved credentials in the cache. If --out-cache is also specified, credentials will still be stored into the output credential cache. (Added in release 1.19.)

--out-cache ccache
    Initialize ccache and store all retrieved credentials into it. Do not store acquired credentials in the input cache. (Added in release 1.19.)

--u2u ccache
    Requests a user-to-user ticket. ccache must contain a local krbtgt ticket for the server principal. The reported version number will typically be 0, as the resulting ticket is not encrypted in the server's long-term key.

ENVIRONMENT

See kerberos for a description of Kerberos environment variables.

FILES

@CCNAME@
    Default location of the credentials cache

SEE ALSO

kinit, kdestroy, kerberos

AUTHOR
MIT

COPYRIGHT
1985-2025, MIT