1 /* 2 * Copyright (c) 1999 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of KTH nor the names of its contributors may be 18 * used to endorse or promote products derived from this software without 19 * specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY 22 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ 32 33 /* $Id$ */ 34 35 #include <string.h> 36 #include <stdlib.h> 37 #include <krb5.h> 38 39 const char* check_length(krb5_context, krb5_principal, krb5_data *); 40 41 /* specify the api-version this library conforms to */ 42 43 int version = 0; 44 45 /* just check the length of the password, this is what the default 46 check does, but this lets you specify the minimum length in 47 krb5.conf */ 48 const char* 49 check_length(krb5_context context, 50 krb5_principal prinipal, 51 krb5_data *password) 52 { 53 int min_length = krb5_config_get_int_default(context, NULL, 6, 54 "password_quality", 55 "min_length", 56 NULL); 57 if(password->length < min_length) 58 return "Password too short"; 59 return NULL; 60 } 61 62 #ifdef DICTPATH 63 64 /* use cracklib to check password quality; this requires a patch for 65 cracklib that can be found at 66 ftp://ftp.pdc.kth.se/pub/krb/src/cracklib.patch */ 67 68 const char* 69 check_cracklib(krb5_context context, 70 krb5_principal principal, 71 krb5_data *password) 72 { 73 char *s = malloc(password->length + 1); 74 char *msg; 75 char *strings[2]; 76 if(s == NULL) 77 return NULL; /* XXX */ 78 strings[0] = principal->name.name_string.val[0]; /* XXX */ 79 strings[1] = NULL; 80 memcpy(s, password->data, password->length); 81 s[password->length] = '\0'; 82 msg = FascistCheck(s, DICTPATH, strings); 83 memset(s, 0, password->length); 84 free(s); 85 return msg; 86 } 87 #endif 88