kinit

kinit is used to obtain and cache Kerberos ticket-granting tickets. This tool is similar in functionality to the kinit tools commonly found in other Kerberos implementations, such as SEAM and MIT Reference implementations.

The user must be registered as a principal with the Key Distribution Center (KDC) prior to running kinit.

SYNOPSIS

kinit [ commands ] <principal name>

DESCRIPTION

By default, for all Unix platforms a cache file named/tmp/krb5cc_<uid> will be generated. <uid> is the user identification number of the user logged into the system. For all other platforms, a cache file named <USER_HOME>/krb5cc_<USER_NAME> would be generated.

<USER_HOME> is obtained from the java.lang.System property user.home. <USER_NAME> is obtained from java.lang.System property user.name. If <USER_HOME> is null, the cache file would be stored in the current directory that the program is running from. <USER_NAME> is the operating system's login username. This username could be different than the user's principal name. For example on Solaris, it could be /home/duke/krb5cc_duke, in which duke is the <USER_NAME> and /home/duke is the <USER_HOME>.

By default, the keytab name is retrieved from the Kerberos configuration file. If the keytab name is not specifed in the Kerberos configuration file, the name is assumed to be <USER_HOME>/krb5.keytab

If you do not specify the password using the password option on the command line, kinit will prompt you for the password.

Note: password is provided only for testing purposes. Do not place your password in a script or provide your password on the command line. Doing so will compromise your password.

For more information see the man pages for kinit.

COMMANDS

Usage:kinit -fp [-c <cache_name>] [-k] [-t <keytab_filename>] [<principal>] [<password>] [-help]

Command Option Description

-f Issue a forwardable ticket.

-p Issue a proxiable ticket.

-c <cache_name> The cache name (i.e., FILE:/temp/mykrb5cc).

-k Use keytab

-t <keytab_filename> The keytab name (i.e, /home/duke/krb5.keytab).

<principal> The principal name (i.e., duke@java.sun.com).

<password> The principal's Kerberos password.
(DO NOT SPECIFY ON COMMAND LINE OR IN A SCRIPT.)

-help Display instructions.

Command Option	Description
`-f`	Issue a forwardable ticket.
`-p`	Issue a proxiable ticket.
`-c <cache_name>`	The cache name (i.e., `FILE:/temp/mykrb5cc`).
`-k`	Use keytab
`-t <keytab_filename>`	The keytab name (i.e, `/home/duke/krb5.keytab`).
`<principal>`	The principal name (i.e., `duke@java.sun.com`).
`<password>`	The principal's Kerberos password. (DO NOT SPECIFY ON COMMAND LINE OR IN A SCRIPT.)
`-help`	Display instructions.

EXAMPLES

Requesting credentials valid for authentication from the current client host, for the default services, storing the credentials cache in the default location (/home/duke/krb5cc_duke):

kinit duke@JAVA.SUN.COM

Requesting proxiable credentials for a different principal and storing these credentials in a specified file cache:

kinit -p -c FILE:/home/duke/credentials/krb5cc_cafebeef cafebeef@JAVA.SUN.COM

Requesting proxiable and forwardable credentials for a different principal and storing these credentials in a specified file cache:

kinit -f -p -c FILE:/home/duke/credentials/krb5cc_cafebeef cafebeef@JAVA.SUN.COM

Displaying the help menu for kinit:

kinit -help

SECURITY ALERT

The password flag is for testing purposes only. Do not specify your password on the command line. Doing so is a security hole since an attacker could discover your password while running the Unix ps command, for example.