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
|
/*-
* Copyright 1998 Juniper Networks, Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/cdefs.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <pam_modules.h>
#include <config.h>
#if !HAVE_PAM_STRUCT_OPTTAB
# include "pam_opttab.h"
#endif
#if !HAVE_PAM_STD_OPTION && !HAVE_OPENPAM
# include "pam_option.h"
#endif
#include "pam_get_pass.h"
int
pam_conv_pass(pam_handle_t *pamh, const char *prompt, struct options *options)
{
const struct pam_conv *conv;
struct pam_message msg;
const struct pam_message *msgs[1];
struct pam_response *resp;
const void *item;
int retval;
retval = pam_get_item(pamh, PAM_CONV, &item);
if (retval != PAM_SUCCESS)
return retval;
conv = (const struct pam_conv *)item;
msg.msg_style = pam_test_option(options, PAM_OPT_ECHO_PASS, NULL) ?
PAM_PROMPT_ECHO_ON : PAM_PROMPT_ECHO_OFF;
msg.msg = prompt;
msgs[0] = &msg;
retval = conv->conv(1, msgs, &resp, conv->appdata_ptr);
if (retval != PAM_SUCCESS)
return retval;
if (resp[0].resp == NULL)
return PAM_AUTHTOK_RECOVERY_ERR;
retval = pam_set_item(pamh, PAM_AUTHTOK, resp[0].resp);
if (retval != PAM_SUCCESS)
return retval;
memset(resp[0].resp, 0, strlen(resp[0].resp));
free(resp[0].resp);
free(resp);
return PAM_SUCCESS;
}
int
pam_get_pass(pam_handle_t *pamh, const char **passp, const char *prompt,
struct options *options)
{
int retval;
const void *item = NULL;
/*
* Grab the already-entered password.
*/
retval = pam_get_item(pamh, PAM_AUTHTOK, &item);
/*
* Always use standard prompt for the first time.
*/
if (item == NULL)
prompt = "Password: ";
if (pam_test_option(options, PAM_OPT_TRY_FIRST_PASS, NULL) ||
pam_test_option(options, PAM_OPT_USE_FIRST_PASS, NULL)) {
if (retval != PAM_SUCCESS)
return retval;
} else {
item = NULL; /* Need own password. */
}
if (item == NULL) {
/* The user hasn't entered a password yet. */
if (pam_test_option(options, PAM_OPT_USE_FIRST_PASS, NULL))
return PAM_AUTH_ERR;
/* Use the conversation function to get a password. */
retval = pam_conv_pass(pamh, prompt, options);
if (retval != PAM_SUCCESS)
return retval;
retval = pam_get_item(pamh, PAM_AUTHTOK, &item);
if (retval != PAM_SUCCESS)
return retval;
}
*passp = (const char *)item;
return PAM_SUCCESS;
}
|
