/* * Copyright (c) 1999 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. Neither the name of KTH nor the names of its contributors may be * used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* $Id$ */ #include <string.h> #include <stdlib.h> #include <krb5.h> const char* check_length(krb5_context, krb5_principal, krb5_data *); /* specify the api-version this library conforms to */ int version = 0; /* just check the length of the password, this is what the default check does, but this lets you specify the minimum length in krb5.conf */ const char* check_length(krb5_context context, krb5_principal prinipal, krb5_data *password) { int min_length = krb5_config_get_int_default(context, NULL, 6, "password_quality", "min_length", NULL); if(password->length < min_length) return "Password too short"; return NULL; } #ifdef DICTPATH /* use cracklib to check password quality; this requires a patch for cracklib that can be found at ftp://ftp.pdc.kth.se/pub/krb/src/cracklib.patch */ const char* check_cracklib(krb5_context context, krb5_principal principal, krb5_data *password) { char *s = malloc(password->length + 1); char *msg; char *strings[2]; if(s == NULL) return NULL; /* XXX */ strings[0] = principal->name.name_string.val[0]; /* XXX */ strings[1] = NULL; memcpy(s, password->data, password->length); s[password->length] = '\0'; msg = FascistCheck(s, DICTPATH, strings); memset(s, 0, password->length); free(s); return msg; } #endif