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
|
/* x_long.c */
/*
* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
* 2000.
*/
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/bn.h>
/*
* Custom primitive type for long handling. This converts between an
* ASN1_INTEGER and a long directly.
*/
static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
const ASN1_ITEM *it);
static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
int utype, char *free_cont, const ASN1_ITEM *it);
static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
int indent, const ASN1_PCTX *pctx);
static ASN1_PRIMITIVE_FUNCS long_pf = {
NULL, 0,
long_new,
long_free,
long_free, /* Clear should set to initial value */
long_c2i,
long_i2c,
long_print
};
ASN1_ITEM_start(LONG)
ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF, "LONG"
ASN1_ITEM_end(LONG)
ASN1_ITEM_start(ZLONG)
ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG"
ASN1_ITEM_end(ZLONG)
static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
*(long *)pval = it->size;
return 1;
}
static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
*(long *)pval = it->size;
}
static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
const ASN1_ITEM *it)
{
long ltmp;
unsigned long utmp;
int clen, pad, i;
/* this exists to bypass broken gcc optimization */
char *cp = (char *)pval;
/* use memcpy, because we may not be long aligned */
memcpy(<mp, cp, sizeof(long));
if (ltmp == it->size)
return -1;
/*
* Convert the long to positive: we subtract one if negative so we can
* cleanly handle the padding if only the MSB of the leading octet is
* set.
*/
if (ltmp < 0)
utmp = -ltmp - 1;
else
utmp = ltmp;
clen = BN_num_bits_word(utmp);
/* If MSB of leading octet set we need to pad */
if (!(clen & 0x7))
pad = 1;
else
pad = 0;
/* Convert number of bits to number of octets */
clen = (clen + 7) >> 3;
if (cont) {
if (pad)
*cont++ = (ltmp < 0) ? 0xff : 0;
for (i = clen - 1; i >= 0; i--) {
cont[i] = (unsigned char)(utmp & 0xff);
if (ltmp < 0)
cont[i] ^= 0xff;
utmp >>= 8;
}
}
return clen + pad;
}
static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
int utype, char *free_cont, const ASN1_ITEM *it)
{
int neg, i;
long ltmp;
unsigned long utmp = 0;
char *cp = (char *)pval;
if (len > (int)sizeof(long)) {
ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
return 0;
}
/* Is it negative? */
if (len && (cont[0] & 0x80))
neg = 1;
else
neg = 0;
utmp = 0;
for (i = 0; i < len; i++) {
utmp <<= 8;
if (neg)
utmp |= cont[i] ^ 0xff;
else
utmp |= cont[i];
}
ltmp = (long)utmp;
if (neg) {
ltmp++;
ltmp = -ltmp;
}
if (ltmp == it->size) {
ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
return 0;
}
memcpy(cp, <mp, sizeof(long));
return 1;
}
static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
int indent, const ASN1_PCTX *pctx)
{
return BIO_printf(out, "%ld\n", *(long *)pval);
}
|
