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