| 2 |
- |
1 |
/* Copyright (C) 1994, 1997, 1999 Aladdin Enterprises. All rights reserved.
|
|
|
2 |
|
|
|
3 |
This software is provided AS-IS with no warranty, either express or
|
|
|
4 |
implied.
|
|
|
5 |
|
|
|
6 |
This software is distributed under license and may not be copied,
|
|
|
7 |
modified or distributed except as expressly authorized under the terms
|
|
|
8 |
of the license contained in the file LICENSE in this distribution.
|
|
|
9 |
|
|
|
10 |
For more information about licensing, please refer to
|
|
|
11 |
http://www.ghostscript.com/licensing/. For information on
|
|
|
12 |
commercial licensing, go to http://www.artifex.com/licensing/ or
|
|
|
13 |
contact Artifex Software, Inc., 101 Lucas Valley Road #110,
|
|
|
14 |
San Rafael, CA 94903, U.S.A., +1(415)492-9861.
|
|
|
15 |
*/
|
|
|
16 |
|
|
|
17 |
/* $Id: zmisc1.c,v 1.7 2002/06/16 03:43:51 lpd Exp $ */
|
|
|
18 |
/* Miscellaneous Type 1 font operators */
|
|
|
19 |
#include "memory_.h"
|
|
|
20 |
#include "ghost.h"
|
|
|
21 |
#include "oper.h"
|
|
|
22 |
#include "gscrypt1.h"
|
|
|
23 |
#include "stream.h" /* for getting state of PFBD stream */
|
|
|
24 |
#include "strimpl.h"
|
|
|
25 |
#include "sfilter.h"
|
|
|
26 |
#include "idict.h"
|
|
|
27 |
#include "idparam.h"
|
|
|
28 |
#include "ifilter.h"
|
|
|
29 |
|
|
|
30 |
/* <state> <from_string> <to_string> .type1encrypt <new_state> <substring> */
|
|
|
31 |
/* <state> <from_string> <to_string> .type1decrypt <new_state> <substring> */
|
|
|
32 |
private int type1crypt(i_ctx_t *,
|
|
|
33 |
int (*)(byte *, const byte *, uint, ushort *));
|
|
|
34 |
private int
|
|
|
35 |
ztype1encrypt(i_ctx_t *i_ctx_p)
|
|
|
36 |
{
|
|
|
37 |
return type1crypt(i_ctx_p, gs_type1_encrypt);
|
|
|
38 |
}
|
|
|
39 |
private int
|
|
|
40 |
ztype1decrypt(i_ctx_t *i_ctx_p)
|
|
|
41 |
{
|
|
|
42 |
return type1crypt(i_ctx_p, gs_type1_decrypt);
|
|
|
43 |
}
|
|
|
44 |
private int
|
|
|
45 |
type1crypt(i_ctx_t *i_ctx_p,
|
|
|
46 |
int (*proc)(byte *, const byte *, uint, ushort *))
|
|
|
47 |
{
|
|
|
48 |
os_ptr op = osp;
|
|
|
49 |
crypt_state state;
|
|
|
50 |
uint ssize;
|
|
|
51 |
|
|
|
52 |
check_type(op[-2], t_integer);
|
|
|
53 |
state = op[-2].value.intval;
|
|
|
54 |
if (op[-2].value.intval != state)
|
|
|
55 |
return_error(e_rangecheck); /* state value was truncated */
|
|
|
56 |
check_read_type(op[-1], t_string);
|
|
|
57 |
check_write_type(*op, t_string);
|
|
|
58 |
ssize = r_size(op - 1);
|
|
|
59 |
if (r_size(op) < ssize)
|
|
|
60 |
return_error(e_rangecheck);
|
|
|
61 |
discard((*proc)(op->value.bytes, op[-1].value.const_bytes, ssize,
|
|
|
62 |
&state)); /* can't fail */
|
|
|
63 |
op[-2].value.intval = state;
|
|
|
64 |
op[-1] = *op;
|
|
|
65 |
r_set_size(op - 1, ssize);
|
|
|
66 |
pop(1);
|
|
|
67 |
return 0;
|
|
|
68 |
}
|
|
|
69 |
|
|
|
70 |
/* Get the seed parameter for eexecEncode/Decode. */
|
|
|
71 |
/* Return npop if OK. */
|
|
|
72 |
private int
|
|
|
73 |
eexec_param(os_ptr op, ushort * pcstate)
|
|
|
74 |
{
|
|
|
75 |
int npop = 1;
|
|
|
76 |
|
|
|
77 |
if (r_has_type(op, t_dictionary))
|
|
|
78 |
++npop, --op;
|
|
|
79 |
check_type(*op, t_integer);
|
|
|
80 |
*pcstate = op->value.intval;
|
|
|
81 |
if (op->value.intval != *pcstate)
|
|
|
82 |
return_error(e_rangecheck); /* state value was truncated */
|
|
|
83 |
return npop;
|
|
|
84 |
}
|
|
|
85 |
|
|
|
86 |
/* <target> <seed> eexecEncode/filter <file> */
|
|
|
87 |
/* <target> <seed> <dict_ignored> eexecEncode/filter <file> */
|
|
|
88 |
private int
|
|
|
89 |
zexE(i_ctx_t *i_ctx_p)
|
|
|
90 |
{
|
|
|
91 |
os_ptr op = osp;
|
|
|
92 |
stream_exE_state state;
|
|
|
93 |
int code = eexec_param(op, &state.cstate);
|
|
|
94 |
|
|
|
95 |
if (code < 0)
|
|
|
96 |
return code;
|
|
|
97 |
return filter_write(i_ctx_p, code, &s_exE_template, (stream_state *)&state, 0);
|
|
|
98 |
}
|
|
|
99 |
|
|
|
100 |
/* <source> <seed> eexecDecode/filter <file> */
|
|
|
101 |
/* <source> <dict> eexecDecode/filter <file> */
|
|
|
102 |
private int
|
|
|
103 |
zexD(i_ctx_t *i_ctx_p)
|
|
|
104 |
{
|
|
|
105 |
os_ptr op = osp;
|
|
|
106 |
stream_exD_state state;
|
|
|
107 |
int code;
|
|
|
108 |
|
|
|
109 |
(*s_exD_template.set_defaults)((stream_state *)&state);
|
|
|
110 |
if (r_has_type(op, t_dictionary)) {
|
|
|
111 |
uint cstate;
|
|
|
112 |
bool is_eexec;
|
|
|
113 |
|
|
|
114 |
check_dict_read(*op);
|
|
|
115 |
if ((code = dict_uint_param(op, "seed", 0, 0xffff, 0x10000,
|
|
|
116 |
&cstate)) < 0 ||
|
|
|
117 |
(code = dict_int_param(op, "lenIV", 0, max_int, 4,
|
|
|
118 |
&state.lenIV)) < 0 ||
|
|
|
119 |
(code = dict_bool_param(op, "eexec", false,
|
|
|
120 |
&is_eexec)) < 0
|
|
|
121 |
)
|
|
|
122 |
return code;
|
|
|
123 |
state.cstate = cstate;
|
|
|
124 |
state.binary = (is_eexec ? -1 : 1);
|
|
|
125 |
code = 1;
|
|
|
126 |
} else {
|
|
|
127 |
state.binary = 1;
|
|
|
128 |
code = eexec_param(op, &state.cstate);
|
|
|
129 |
}
|
|
|
130 |
if (code < 0)
|
|
|
131 |
return code;
|
|
|
132 |
/*
|
|
|
133 |
* If we're reading a .PFB file, let the filter know about it,
|
|
|
134 |
* so it can read recklessly to the end of the binary section.
|
|
|
135 |
*/
|
|
|
136 |
if (r_has_type(op - 1, t_file)) {
|
|
|
137 |
stream *s = (op - 1)->value.pfile;
|
|
|
138 |
|
|
|
139 |
if (s->state != 0 && s->state->template == &s_PFBD_template) {
|
|
|
140 |
stream_PFBD_state *pss = (stream_PFBD_state *)s->state;
|
|
|
141 |
|
|
|
142 |
state.pfb_state = pss;
|
|
|
143 |
/*
|
|
|
144 |
* If we're reading the binary section of a PFB stream,
|
|
|
145 |
* avoid the conversion from binary to hex and back again.
|
|
|
146 |
*/
|
|
|
147 |
if (pss->record_type == 2) {
|
|
|
148 |
/*
|
|
|
149 |
* The PFB decoder may have converted some data to hex
|
|
|
150 |
* already. Convert it back if necessary.
|
|
|
151 |
*/
|
|
|
152 |
if (pss->binary_to_hex && sbufavailable(s) > 0) {
|
|
|
153 |
state.binary = 0; /* start as hex */
|
|
|
154 |
state.hex_left = sbufavailable(s);
|
|
|
155 |
} else {
|
|
|
156 |
state.binary = 1;
|
|
|
157 |
}
|
|
|
158 |
pss->binary_to_hex = 0;
|
|
|
159 |
}
|
|
|
160 |
state.record_left = pss->record_left;
|
|
|
161 |
}
|
|
|
162 |
}
|
|
|
163 |
return filter_read(i_ctx_p, code, &s_exD_template, (stream_state *)&state, 0);
|
|
|
164 |
}
|
|
|
165 |
|
|
|
166 |
/* ------ Initialization procedure ------ */
|
|
|
167 |
|
|
|
168 |
const op_def zmisc1_op_defs[] =
|
|
|
169 |
{
|
|
|
170 |
{"3.type1encrypt", ztype1encrypt},
|
|
|
171 |
{"3.type1decrypt", ztype1decrypt},
|
|
|
172 |
op_def_begin_filter(),
|
|
|
173 |
{"2eexecEncode", zexE},
|
|
|
174 |
{"2eexecDecode", zexD},
|
|
|
175 |
op_def_end(0)
|
|
|
176 |
};
|