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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved.
*/
#include <stdio.h>
#include "autoconf.h"
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <time.h>
#include <kadm5/admin.h>
#include "admin_internal.h"
#include <krb5.h>
#define string_text error_message
/*
* Function: kadm5_chpass_principal_util
*
* Purpose: Wrapper around chpass_principal. We can read new pw, change pw and return useful messages
*
* Arguments:
*
* princ (input) a krb5b_principal structure for the
* principal whose password we should change.
*
* new_password (input) NULL or a null terminated string with the
* the principal's desired new password. If new_password
* is NULL then this routine will read a new password.
*
* pw_ret (output) if non-NULL, points to a static buffer
* containing the new password (if password is prompted
* internally), or to the new_password argument (if
* that is non-NULL). If the former, then the buffer
* is only valid until the next call to the function,
* and the caller should be sure to zero it when
* it is no longer needed.
*
* msg_ret (output) a useful message is copied here.
*
* <return value> exit status of 0 for success, else the com err code
* for the last significant routine called.
*
* Requires:
*
* A msg_ret should point to a buffer large enough for the messasge.
*
* Effects:
*
* Modifies:
*
*
*/
kadm5_ret_t _kadm5_chpass_principal_util(void *server_handle,
void *lhandle,
krb5_principal princ,
char *new_pw,
char **ret_pw,
char *msg_ret,
unsigned int msg_len)
{
int code, code2;
unsigned int pwsize;
static char buffer[255];
char *new_password;
kadm5_principal_ent_rec princ_ent;
kadm5_policy_ent_rec policy_ent;
_KADM5_CHECK_HANDLE(server_handle);
if (ret_pw)
*ret_pw = NULL;
if (new_pw != NULL) {
new_password = new_pw;
} else { /* read the password */
krb5_context context;
if ((code = (int) kadm5_init_krb5_context(&context)) == 0) {
pwsize = sizeof(buffer);
code = krb5_read_password(context, KADM5_PW_FIRST_PROMPT,
KADM5_PW_SECOND_PROMPT,
buffer, &pwsize);
krb5_free_context(context);
}
if (code == 0)
new_password = buffer;
else {
#ifdef ZEROPASSWD
memset(buffer, 0, sizeof(buffer));
#endif
if (code == KRB5_LIBOS_BADPWDMATCH) {
strncpy(msg_ret, string_text(CHPASS_UTIL_NEW_PASSWORD_MISMATCH),
msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(code);
} else {
strncpy(msg_ret, error_message(code), msg_len - 1);
strncat(msg_ret, " ", msg_len - 1);
strncat(msg_ret, string_text(CHPASS_UTIL_WHILE_READING_PASSWORD),
msg_len - 1);
strncat(msg_ret, string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED),
msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(code);
}
}
if (pwsize == 0) {
#ifdef ZEROPASSWD
memset(buffer, 0, sizeof(buffer));
#endif
strncpy(msg_ret, string_text(CHPASS_UTIL_NO_PASSWORD_READ), msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(KRB5_LIBOS_CANTREADPWD); /* could do better */
}
}
if (ret_pw)
*ret_pw = new_password;
code = kadm5_chpass_principal(server_handle, princ, new_password);
#ifdef ZEROPASSWD
if (!ret_pw)
memset(buffer, 0, sizeof(buffer)); /* in case we read a new password */
#endif
if (code == KADM5_OK) {
strncpy(msg_ret, string_text(CHPASS_UTIL_PASSWORD_CHANGED), msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(0);
}
if ((code != KADM5_PASS_Q_TOOSHORT) &&
(code != KADM5_PASS_REUSE) &&(code != KADM5_PASS_Q_CLASS) &&
(code != KADM5_PASS_Q_DICT) && (code != KADM5_PASS_TOOSOON)) {
/* Can't get more info for other errors */
snprintf(buffer, sizeof(buffer), "%s %s", error_message(code),
string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE));
snprintf(msg_ret, msg_len, "%s\n%s\n",
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED),
buffer);
return(code);
}
/* Ok, we have a password quality error. Return a good message */
if (code == KADM5_PASS_REUSE) {
strncpy(msg_ret, string_text(CHPASS_UTIL_PASSWORD_REUSE), msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(code);
}
if (code == KADM5_PASS_Q_DICT) {
strncpy(msg_ret, string_text(CHPASS_UTIL_PASSWORD_IN_DICTIONARY),
msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(code);
}
/* Look up policy for the remaining messages */
code2 = kadm5_get_principal (lhandle, princ, &princ_ent,
KADM5_PRINCIPAL_NORMAL_MASK);
if (code2 != 0) {
strncpy(msg_ret, error_message(code2), msg_len - 1);
strncat(msg_ret, " ", msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, string_text(CHPASS_UTIL_GET_PRINC_INFO), msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, "\n", msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, error_message(code), msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, " ", msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE),
msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, "\n\n", msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED),
msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, "\n", msg_len - 1 - strlen(msg_ret));
msg_ret[msg_len - 1] = '\0';
return(code);
}
if ((princ_ent.aux_attributes & KADM5_POLICY) == 0) {
strncpy(msg_ret, error_message(code), msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, " ", msg_len - 1 - strlen(msg_ret));
strncpy(msg_ret, string_text(CHPASS_UTIL_NO_POLICY_YET_Q_ERROR),
msg_len - 1 - strlen(msg_ret));
strncat(msg_ret, "\n\n", msg_len - 1 - strlen(msg_ret));
strncpy(msg_ret, string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED),
msg_len - 1 - strlen(msg_ret));
msg_ret[msg_len - 1] = '\0';
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
return(code);
}
code2 = kadm5_get_policy(lhandle, princ_ent.policy,
&policy_ent);
if (code2 != 0) {
snprintf(msg_ret, msg_len, "%s %s\n%s %s\n\n%s\n ", error_message(code2),
string_text(CHPASS_UTIL_GET_POLICY_INFO),
error_message(code),
string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE),
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED));
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
return(code);
}
if (code == KADM5_PASS_Q_TOOSHORT) {
snprintf(msg_ret, msg_len, string_text(CHPASS_UTIL_PASSWORD_TOO_SHORT),
policy_ent.pw_min_length);
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
/* Can't get more info for other errors */
if (code == KADM5_PASS_Q_CLASS) {
snprintf(msg_ret, msg_len, string_text(CHPASS_UTIL_TOO_FEW_CLASSES),
policy_ent.pw_min_classes);
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
if (code == KADM5_PASS_TOOSOON) {
time_t until;
char *time_string, *ptr;
until = princ_ent.last_pwd_change + policy_ent.pw_min_life;
time_string = ctime(&until);
if (*(ptr = &time_string[strlen(time_string)-1]) == '\n')
*ptr = '\0';
snprintf(msg_ret, msg_len, string_text(CHPASS_UTIL_PASSWORD_TOO_SOON),
time_string);
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
/* We should never get here, but just in case ... */
snprintf(buffer, sizeof(buffer), "%s %s", error_message(code),
string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE));
snprintf(msg_ret, msg_len, "%s\n%s\n",
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED),
buffer);
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
|
