1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* $OpenBSD: new_pwd.c,v 1.6 2005/05/01 02:56:28 deraadt Exp $ */
/* $KTH: new_pwd.c,v 1.11 1997/05/02 14:28:54 assar Exp $ */
/*
* Copyright (c) 1995, 1996, 1997 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. Neither the name of the Institute 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 THE INSTITUTE AND 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 THE INSTITUTE OR 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.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <des.h>
#include <kerberosIV/krb.h>
#include <kerberosIV/kadm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifdef NOENCRYPTION
#define read_long_pw_string placebo_read_pw_string
#else
#define read_long_pw_string des_read_pw_string
#endif
static char *
check_pw(char *pword)
{
char *t;
if (strlen(pword) == 0)
return "Null passwords are not allowed - Please enter a longer password.";
if (strlen(pword) < MIN_KPW_LEN)
return "Password is to short - Please enter a longer password.";
if (strcmp(pword, "s/key") == 0)
return "That password collides with a system feature. Choose another.\n";
/* Don't allow all lower case passwords regardless of length */
for (t = pword; *t && islower(*t); t++)
;
if (*t == 0)
return "Please don't use an all-lower case password.\n"
"\tUnusual capitalization, delimiter characters or "
"digits are suggested.";
return NULL;
}
int
get_pw_new_pwd(char *pword, int pwlen, krb_principal *pr, int print_realm)
{
char ppromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
char npromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
char p[MAX_K_NAME_SZ];
char local_realm[REALM_SZ];
int status;
char *expl;
char *q;
/*
* We don't care about failure; this is to determine whether or
* not to print the realm in the prompt for a new password.
*/
krb_get_lrealm(local_realm, 1);
if (strcmp(local_realm, pr->realm))
print_realm++;
krb_unparse_name_r(pr, p);
if (print_realm == 0 && (q = strrchr(p, '@')))
*q = 0;
snprintf(ppromp, sizeof(ppromp), "Old password for %s:", p);
if (read_long_pw_string(pword, pwlen-1, ppromp, 0)) {
fprintf(stderr, "Error reading old password.\n");
return -1;
}
status = krb_get_pw_in_tkt(pr->name, pr->instance, pr->realm,
PWSERV_NAME, KADM_SINST, 1, pword);
if (status != KSUCCESS) {
if (status == INTK_BADPW) {
printf("Incorrect old password.\n");
return -1;
} else {
fprintf(stderr, "Kerberos error: %s\n",
krb_get_err_text(status));
return -1;
}
}
memset(pword, 0, pwlen);
do {
char verify[MAX_KPW_LEN];
snprintf(npromp, sizeof(npromp), "New Password for %s:",p);
if (read_long_pw_string(pword, pwlen-1, npromp, 0)) {
fprintf(stderr,
"Error reading new password, password unchanged.\n");
return -1;
}
expl = check_pw (pword);
if (expl) {
printf("\n\t%s\n\n", expl);
continue;
}
/* Now we got an ok password, verify it. */
snprintf(npromp, sizeof(npromp),
"Verifying New Password for %s:", p);
if (read_long_pw_string(verify, MAX_KPW_LEN-1, npromp, 0)) {
fprintf(stderr,
"Error reading new password, password unchanged.\n");
return -1;
}
if (strcmp(pword, verify) != 0) {
printf("Verify failure - try again\n");
expl = ""; /* continue */
}
} while (expl);
return 0;
}
|
