104 lines
3.3 KiB
Groff
104 lines
3.3 KiB
Groff
.\" Copyright (c) 2003-2005 Kungliga Tekniska Högskolan
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.\" (Royal Institute of Technology, Stockholm, Sweden).
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" 3. Neither the name of the Institute nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: krb5_kuserok.3 15083 2005-05-04 12:11:22Z joda $
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.\"
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.Dd May 4, 2005
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.Dt KRB5_KUSEROK 3
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.Os HEIMDAL
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.Sh NAME
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.Nm krb5_kuserok
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.Nd "checks if a principal is permitted to login as a user"
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.Sh LIBRARY
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Kerberos 5 Library (libkrb5, -lkrb5)
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.Sh SYNOPSIS
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.In krb5.h
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.Ft krb5_boolean
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.Fo krb5_kuserok
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.Fa "krb5_context context"
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.Fa "krb5_principal principal"
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.Fa "const char *user"
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.Fc
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.Sh DESCRIPTION
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This function takes the name of a local
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.Fa user
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and checks if
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.Fa principal
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is allowed to log in as that user.
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.Pp
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The
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.Fa user
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may have a
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.Pa ~/.k5login
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file listing principals that are allowed to login as that user. If
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that file does not exist, all principals with a first component
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identical to the username, and a realm considered local, are allowed
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access.
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.Pp
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The
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.Pa .k5login
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file must contain one principal per line, be owned by
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.Fa user ,
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and not be writable by group or other (but must be readable by
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anyone).
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.Pp
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Note that if the file exists, no implicit access rights are given to
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.Fa user Ns @ Ns Aq localrealm .
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.Pp
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Optionally, a set of files may be put in
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.Pa ~/.k5login.d ( Ns
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a directory), in which case they will all be checked in the same
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manner as
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.Pa .k5login .
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The files may be called anything, but files starting with a hash
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.Dq ( # ) ,
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or ending with a tilde
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.Dq ( ~ )
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are ignored. Subdirectories are not traversed. Note that this
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directory may not be checked by other implementations.
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.Sh RETURN VALUES
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.Nm
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returns
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.Dv TRUE
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if access should be granted,
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.Dv FALSE
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otherwise.
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.Sh HISTORY
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The
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.Pa ~/.k5login.d
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feature appeared in Heimdal 0.7.
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.Sh SEE ALSO
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.Xr krb5_get_default_realms 3 ,
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.Xr krb5_verify_user 3 ,
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.Xr krb5_verify_user_lrealm 3 ,
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.Xr krb5_verify_user_opt 3 ,
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.Xr krb5.conf 5
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