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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +wallet\-rekey \- Client for rekeying a Kerberos keytab using wallet +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +\&\fBwallet-rekey\fR [\fB\-hv\fR] [\fB\-c\fR \fIcommand\fR] [\fB\-k\fR \fIprincipal\fR] + [\fB\-p\fR \fIport\fR] [\fB\-s\fR \fIserver\fR] [\fB\-u\fR \fIprincipal\fR] [\fIkeytab\fR ...] +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fBwallet-rekey\fR is a specialized client for the wallet system used to +rekey a Kerberos keytab by downloading new keytab objects from wallet for +each principal found in the keytab. For each keytab file listed on the +command line, it walks through the principals in that keytab, finds all +from the local default realm, requests new wallet keytab objects for each +principal (removing the realm when naming the keytab), and merges the new +keys into the keytab. +.PP +If an error occurs, \fBwallet-rekey\fR continues to rekey all principals that +it can, producing error messages for those that it cannot rekey. +.PP +If no keytab file name is given on the command line, \fBwallet-rekey\fR +attempts to rekey \fI/etc/krb5.keytab\fR, the system default keytab file. +.PP +The new keys are merged into the existing keytab file, but old keys are +not removed. This means that, over time, the keytab will grow and +accumulate old keys, which eventually should no longer be honored. +Administrators may want to run: +.PP +.Vb 1 +\& kadmin \-q \*(Aqktremove \-k <keytab> <principal> old\*(Aq +.Ve +.PP +for \s-1MIT\s0 Kerberos, where <keytab> is the path to the keytab and <principal> +is a principal in the keytab (repeating the command for each principal) +or: +.PP +.Vb 1 +\& ktutil \-k <keytab> purge +.Ve +.PP +for Heimdal. The Heimdal command can be run by any user with access to +the keytab, but the \s-1MIT\s0 Kerberos command unfortunately has to be run by a +someone with direct \fBkadmin\fR access. This functionality will eventually +be provided by \fBwallet-rekey\fR directly. +.SH "OPTIONS" +.IX Header "OPTIONS" +.IP "\fB\-c\fR \fIcommand\fR" 4 +.IX Item "-c command" +The command prefix (remctl type) to use. Normally this is an internal +implementation detail and the default (\f(CW\*(C`wallet\*(C'\fR) should be fine. It may +sometimes be useful to use a different prefix for testing a different +version of the wallet code on the server. This option can also be set in +\&\fIkrb5.conf\fR; see \s-1CONFIGURATION\s0 below. +.IP "\fB\-k\fR \fIprincipal\fR" 4 +.IX Item "-k principal" +The service principal of the wallet server. The default is to use the +\&\f(CW\*(C`host\*(C'\fR principal for the wallet server. The principal chosen must match +one of the keys in the keytab used by \fBremctld\fR on the wallet server. +This option can also be set in \fIkrb5.conf\fR; see \s-1CONFIGURATION\s0 below. +.IP "\fB\-h\fR" 4 +.IX Item "-h" +Display a brief summary of options and exit. All other valid options and +commands are ignored. +.IP "\fB\-p\fR \fIport\fR" 4 +.IX Item "-p port" +The port to connect to on the wallet server. The default is the default +remctl port. This option can also be set in \fIkrb5.conf\fR; see +\&\s-1CONFIGURATION\s0 below. +.IP "\fB\-s\fR \fIserver\fR" 4 +.IX Item "-s server" +The wallet server to connect to. The default may be set when compiling +the wallet client. If it isn't, either \fB\-s\fR must be given or the server +must be set in \fIkrb5.conf\fR. See \s-1CONFIGURATION\s0 below. +.IP "\fB\-u\fR \fIprincipal\fR" 4 +.IX Item "-u principal" +Rather than using the user's existing ticket cache for authentication, +authenticate as \fIprincipal\fR first and use those credentials for +authentication to the wallet server. \fBwallet\fR will prompt for the +password for \fIprincipal\fR. Non-password authentication methods such as +\&\s-1PKINIT\s0 aren't supported; to use those, run \fBkinit\fR first and use an +existing ticket cache. +.IP "\fB\-v\fR" 4 +.IX Item "-v" +Display the version of the \fBwallet\fR client and exit. All other valid +options and commands are ignored. +.SH "CONFIGURATION" +.IX Header "CONFIGURATION" +The wallet system, including \fBwallet-rekey\fR, can optionally be configured +in the system \fIkrb5.conf\fR. It will read the default \fIkrb5.conf\fR file +for the Kerberos libraries with which it was compiled. To set an option, +put the option in the [appdefaults] section. \fBwallet-rekey\fR will look +for options either at the top level of the [appdefaults] section or in a +subsection named \f(CW\*(C`wallet\*(C'\fR. For example, the following fragment of a +\&\fIkrb5.conf\fR file would set the default port to 4373 and the default +server to \f(CW\*(C`wallet.example.org\*(C'\fR. +.PP +.Vb 5 +\& [appdefaults] +\& wallet_port = 4373 +\& wallet = { +\& wallet_server = wallet.example.org +\& } +.Ve +.PP +The supported options are: +.IP "wallet_principal" 4 +.IX Item "wallet_principal" +The service principal of the wallet server. The default is to use the +\&\f(CW\*(C`host\*(C'\fR principal for the wallet server. The principal chosen must match +one of the keys in the keytab used by \fBremctld\fR on the wallet server. +The \fB\-k\fR command-line option overrides this setting. +.IP "wallet_port" 4 +.IX Item "wallet_port" +The port to connect to on the wallet server. The default is the default +remctl port. The \fB\-p\fR command-line option overrides this setting. +.IP "wallet_server" 4 +.IX Item "wallet_server" +The wallet server to connect to. The \fB\-s\fR command-line option overrides +this setting. The default may be set when compiling the wallet client. +If it isn't, either \fB\-s\fR must be given or this parameter must be present +in in \fIkrb5.conf\fR. +.IP "wallet_type" 4 +.IX Item "wallet_type" +The command prefix (remctl type) to use. Normally this is an internal +implementation detail and the default (\f(CW\*(C`wallet\*(C'\fR) should be fine. It may +sometimes be useful to use a different prefix for testing a different +version of the wallet code on the server. The \fB\-c\fR command-line option +overrides this setting. +.SH "AUTHOR" +.IX Header "AUTHOR" +Russ Allbery <eagle@eyrie.org> +.SH "COPYRIGHT AND LICENSE" +.IX Header "COPYRIGHT AND LICENSE" +Copyright 2010, 2013 The Board of Trustees of the Leland Stanford Junior +University +.PP +Copying and distribution of this file, with or without modification, are +permitted in any medium without royalty provided the copyright notice and +this notice are preserved. This file is offered as-is, without any +warranty. +.PP +SPDX-License-Identifier: \s-1FSFAP\s0 +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIkadmin\fR\|(8), \fIkinit\fR\|(1), \fIkrb5.conf\fR\|(5), \fIremctl\fR\|(1), \fIremctld\fR\|(8), \fIwallet\fR\|(1) +.PP +This program is part of the wallet system. The current version is available +from <https://www.eyrie.org/~eagle/software/wallet/>. +.PP +\&\fBwallet-rekey\fR uses the remctl protocol. For more information about +remctl, see <https://www.eyrie.org/~eagle/software/remctl/>. |