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
|
/* Copyright (C) 1993, 1994, 1998 Aladdin Enterprises. All rights reserved.
This file is part of Aladdin Ghostscript.
Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
or distributor accepts any responsibility for the consequences of using it,
or for whether it serves any particular purpose or works at all, unless he
or she says so in writing. Refer to the Aladdin Ghostscript Free Public
License (the "License") for full details.
Every copy of Aladdin Ghostscript must include a copy of the License,
normally in a plain ASCII text file named PUBLIC. The License grants you
the right to copy, modify and redistribute Aladdin Ghostscript, but only
under certain conditions described in the License. Among other things, the
License requires that the copyright notice and this notice be preserved on
all copies.
*/
/*Id: iutil2.c */
/* Level 2 utilities for Ghostscript interpreter */
#include "memory_.h"
#include "string_.h"
#include "ghost.h"
#include "errors.h"
#include "opcheck.h"
#include "gsparam.h"
#include "gsutil.h" /* bytes_compare prototype */
#include "idict.h"
#include "imemory.h" /* for iutil.h */
#include "iutil.h"
#include "iutil2.h"
/* ------ Password utilities ------ */
/* Read a password from a parameter list. */
/* Return 0 if present, 1 if absent, or an error code. */
int
param_read_password(gs_param_list * plist, const char *kstr, password * ppass)
{
gs_param_string ps;
long ipass;
int code;
ps.data = (const byte *)ppass->data, ps.size = ppass->size,
ps.persistent = false;
code = param_read_string(plist, kstr, &ps);
switch (code) {
case 0: /* OK */
if (ps.size > max_password)
return_error(e_limitcheck);
/* Copy the data back. */
memcpy(ppass->data, ps.data, ps.size);
ppass->size = ps.size;
return 0;
case 1: /* key is missing */
return 1;
}
/* We might have gotten a typecheck because */
/* the supplied password was an integer. */
if (code != e_typecheck)
return code;
code = param_read_long(plist, kstr, &ipass);
if (code != 0) /* error or missing */
return code;
sprintf((char *)ppass->data, "%ld", ipass);
ppass->size = strlen((char *)ppass->data);
return 0;
}
/* Write a password to a parameter list. */
int
param_write_password(gs_param_list * plist, const char *kstr, const password * ppass)
{
gs_param_string ps;
ps.data = (const byte *)ppass->data, ps.size = ppass->size,
ps.persistent = false;
if (ps.size > max_password)
return_error(e_limitcheck);
return param_write_string(plist, kstr, &ps);
}
/* Check a password from a parameter list. */
/* Return 0 if OK, 1 if not OK, or an error code. */
int
param_check_password(gs_param_list * plist, const password * ppass)
{
if (ppass->size != 0) {
password pass;
int code = param_read_password(plist, "Password", &pass);
if (code)
return code;
if (pass.size != ppass->size ||
bytes_compare(&pass.data[0], pass.size,
&ppass->data[0],
ppass->size) != 0
)
return 1;
}
return 0;
}
/* Read a password from, or write a password into, a dictionary */
/* (presumably systemdict). */
private int
dict_find_password(ref ** ppvalue, const ref * pdref, const char *kstr)
{
ref *pvalue;
if (dict_find_string(pdref, kstr, &pvalue) <= 0)
return_error(e_undefined);
if (!r_has_type(pvalue, t_string) ||
r_has_attrs(pvalue, a_read) ||
pvalue->value.const_bytes[0] >= r_size(pvalue)
)
return_error(e_rangecheck);
*ppvalue = pvalue;
return 0;
}
int
dict_read_password(password * ppass, const ref * pdref, const char *pkey)
{
ref *pvalue;
int code = dict_find_password(&pvalue, pdref, pkey);
if (code < 0)
return code;
if (pvalue->value.const_bytes[0] > max_password)
return_error(e_rangecheck); /* limitcheck? */
memcpy(ppass->data, pvalue->value.const_bytes + 1,
(ppass->size = pvalue->value.const_bytes[0]));
return 0;
}
int
dict_write_password(const password * ppass, ref * pdref, const char *pkey)
{
ref *pvalue;
int code = dict_find_password(&pvalue, pdref, pkey);
if (code < 0)
return code;
if (ppass->size >= r_size(pvalue))
return_error(e_rangecheck);
memcpy(pvalue->value.bytes + 1, ppass->data,
(pvalue->value.bytes[0] = ppass->size));
return 0;
}
|
