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pwqual_plugin.h
/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ /* * Copyright (C) 2010 by the Massachusetts Institute of Technology. * All rights reserved. * * Export of this software from the United States of America may * require a specific license from the United States Government. * It is the responsibility of any person or organization contemplating * export to obtain such a license before exporting. * * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and * distribute this software and its documentation for any purpose and * without fee is hereby granted, provided that the above copyright * notice appear in all copies and that both that copyright notice and * this permission notice appear in supporting documentation, and that * the name of M.I.T. not be used in advertising or publicity pertaining * to distribution of the software without specific, written prior * permission. Furthermore if you modify this software you must label * your software as modified software and not distribute it in such a * fashion that it might be confused with the original M.I.T. software. * M.I.T. makes no representations about the suitability of * this software for any purpose. It is provided "as is" without express * or implied warranty. */ /* * Declarations for password quality plugin module implementors. * * The password quality pluggable interface currently has only one supported * major version, which is 1. Major version 1 has a current minor version * number of 1. * * Password quality plugin modules should define a function named * pwqual_<modulename>_initvt, matching the signature: * * krb5_error_code * pwqual_modname_initvt(krb5_context context, int maj_ver, int min_ver, * krb5_plugin_vtable vtable); * * The initvt function should: * * - Check that the supplied maj_ver number is supported by the module, or * return KRB5_PLUGIN_VER_NOTSUPP if it is not. * * - Cast the vtable pointer as appropriate for maj_ver: * maj_ver == 1: Cast to krb5_pwqual_vtable * * - Initialize the methods of the vtable, stopping as appropriate for the * supplied min_ver. Optional methods may be left uninitialized. * * Memory for the vtable is allocated by the caller, not by the module. */ #ifndef KRB5_PWQUAL_PLUGIN_H #define KRB5_PWQUAL_PLUGIN_H #include <krb5/krb5.h> #include <krb5/plugin.h> #include <kadm5/admin.h> /* An abstract type for password quality module data. */ typedef struct krb5_pwqual_moddata_st *krb5_pwqual_moddata; /*** Method type declarations ***/ /* Optional: Initialize module data. dictfile is the realm's configured * dictionary filename. */ typedef krb5_error_code (*krb5_pwqual_open_fn)(krb5_context context, const char *dict_file, krb5_pwqual_moddata *data); /* * Mandatory: Check a password for the principal princ, which has an associated * password policy named policy_name (or no associated policy if policy_name is * NULL). The parameter languages, if not NULL, contains a null-terminated * list of client-specified language tags as defined in RFC 5646. The method * should return one of the following errors if the password fails quality * standards: * * - KADM5_PASS_Q_TOOSHORT: password should be longer * - KADM5_PASS_Q_CLASS: password must have more character classes * - KADM5_PASS_Q_DICT: password contains dictionary words * - KADM5_PASS_Q_GENERIC: unspecified quality failure * * The module should also set an extended error message with * krb5_set_error_message(). The message may be localized according to one of * the language tags in languages. */ typedef krb5_error_code (*krb5_pwqual_check_fn)(krb5_context context, krb5_pwqual_moddata data, const char *password, const char *policy_name, krb5_principal princ, const char **languages); /* Optional: Release resources used by module data. */ typedef void (*krb5_pwqual_close_fn)(krb5_context context, krb5_pwqual_moddata data); /*** vtable declarations **/ /* Password quality plugin vtable for major version 1. */ typedef struct krb5_pwqual_vtable_st { const char *name; /* Mandatory: name of module. */ krb5_pwqual_open_fn open; krb5_pwqual_check_fn check; krb5_pwqual_close_fn close; /* Minor version 1 ends here. */ } *krb5_pwqual_vtable; #endif /* KRB5_PWQUAL_PLUGIN_H */