1 /* $NetBSD: sample_passwd_check.c,v 1.2 2017/01/28 21:31:49 christos Exp $ */
2
3 /*
4 * Copyright (c) 1999 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of KTH nor the names of its contributors may be
20 * used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
24 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
34
35 /* Id */
36
37 #include <string.h>
38 #include <stdlib.h>
39 #include <krb5/krb5.h>
40
41 const char* check_length(krb5_context, krb5_principal, krb5_data *);
42
43 /* specify the api-version this library conforms to */
44
45 int version = 0;
46
47 /* just check the length of the password, this is what the default
48 check does, but this lets you specify the minimum length in
49 krb5.conf */
50 const char*
check_length(krb5_context context,krb5_principal prinipal,krb5_data * password)51 check_length(krb5_context context,
52 krb5_principal prinipal,
53 krb5_data *password)
54 {
55 int min_length = krb5_config_get_int_default(context, NULL, 6,
56 "password_quality",
57 "min_length",
58 NULL);
59 if(password->length < min_length)
60 return "Password too short";
61 return NULL;
62 }
63
64 #ifdef DICTPATH
65
66 /* use cracklib to check password quality; this requires a patch for
67 cracklib that can be found at
68 ftp://ftp.pdc.kth.se/pub/krb/src/cracklib.patch */
69
70 const char*
check_cracklib(krb5_context context,krb5_principal principal,krb5_data * password)71 check_cracklib(krb5_context context,
72 krb5_principal principal,
73 krb5_data *password)
74 {
75 char *s = malloc(password->length + 1);
76 char *msg;
77 char *strings[2];
78 if(s == NULL)
79 return NULL; /* XXX */
80 strings[0] = principal->name.name_string.val[0]; /* XXX */
81 strings[1] = NULL;
82 memcpy(s, password->data, password->length);
83 s[password->length] = '\0';
84 msg = FascistCheck(s, DICTPATH, strings);
85 memset(s, 0, password->length);
86 free(s);
87 return msg;
88 }
89 #endif
90