1 /* $OpenBSD: a_d2i_fp.c,v 1.14 2016/05/04 14:58:09 tedu Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
62 #include <openssl/asn1.h>
63 #include <openssl/buffer.h>
64 #include <openssl/err.h>
66 static int asn1_d2i_read_bio(BIO
*in
, BUF_MEM
**pb
);
71 ASN1_d2i_fp(void *(*xnew
)(void), d2i_of_void
*d2i
, FILE *in
, void **x
)
76 if ((b
= BIO_new(BIO_s_file())) == NULL
) {
77 ASN1err(ASN1_F_ASN1_D2I_FP
, ERR_R_BUF_LIB
);
80 BIO_set_fp(b
, in
, BIO_NOCLOSE
);
81 ret
= ASN1_d2i_bio(xnew
, d2i
, b
, x
);
87 ASN1_d2i_bio(void *(*xnew
)(void), d2i_of_void
*d2i
, BIO
*in
, void **x
)
90 const unsigned char *p
;
94 len
= asn1_d2i_read_bio(in
, &b
);
98 p
= (unsigned char *)b
->data
;
99 ret
= d2i(x
, &p
, len
);
110 ASN1_item_d2i_bio(const ASN1_ITEM
*it
, BIO
*in
, void *x
)
113 const unsigned char *p
;
117 len
= asn1_d2i_read_bio(in
, &b
);
121 p
= (const unsigned char *)b
->data
;
122 ret
= ASN1_item_d2i(x
, &p
, len
, it
);
131 ASN1_item_d2i_fp(const ASN1_ITEM
*it
, FILE *in
, void *x
)
136 if ((b
= BIO_new(BIO_s_file())) == NULL
) {
137 ASN1err(ASN1_F_ASN1_ITEM_D2I_FP
, ERR_R_BUF_LIB
);
140 BIO_set_fp(b
, in
, BIO_NOCLOSE
);
141 ret
= ASN1_item_d2i_bio(it
, b
, x
);
146 #define HEADER_SIZE 8
147 #define ASN1_CHUNK_INITIAL_SIZE (16 * 1024)
149 asn1_d2i_read_bio(BIO
*in
, BUF_MEM
**pb
)
155 size_t want
= HEADER_SIZE
;
162 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ERR_R_MALLOC_FAILURE
);
168 if (want
>= (len
- off
)) {
171 if (len
+ want
< len
||
172 !BUF_MEM_grow_clean(b
, len
+ want
)) {
173 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
174 ERR_R_MALLOC_FAILURE
);
177 i
= BIO_read(in
, &(b
->data
[len
]), want
);
178 if ((i
< 0) && ((len
- off
) == 0)) {
179 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
180 ASN1_R_NOT_ENOUGH_DATA
);
185 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
192 /* else data already loaded */
194 p
= (unsigned char *) & (b
->data
[off
]);
196 c
.inf
= ASN1_get_object(&(c
.p
), &(c
.slen
), &(c
.tag
),
197 &(c
.xclass
), len
- off
);
201 e
= ERR_GET_REASON(ERR_peek_error());
202 if (e
!= ASN1_R_TOO_LONG
)
205 ERR_clear_error(); /* clear error */
207 i
= c
.p
- p
; /* header length */
208 off
+= i
; /* end of data */
211 /* no data body so go round again */
214 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
215 ASN1_R_HEADER_TOO_LONG
);
219 } else if (eos
&& (c
.slen
== 0) && (c
.tag
== V_ASN1_EOC
)) {
220 /* eos value, so go back and read another header */
227 /* suck in c.slen bytes of data */
229 if (want
> (len
- off
)) {
230 size_t chunk_max
= ASN1_CHUNK_INITIAL_SIZE
;
233 if (want
> INT_MAX
/* BIO_read takes an int length */ ||
235 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
241 * Read content in chunks of increasing size
242 * so we can return an error for EOF without
243 * having to allocate the entire content length
246 size_t chunk
= want
> chunk_max
? chunk_max
: want
;
248 if (!BUF_MEM_grow_clean(b
, len
+ chunk
)) {
249 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
250 ERR_R_MALLOC_FAILURE
);
255 i
= BIO_read(in
, &(b
->data
[len
]), chunk
);
257 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
258 ASN1_R_NOT_ENOUGH_DATA
);
262 * This can't overflow because |len+want|
268 if (chunk_max
< INT_MAX
/2)
272 if (off
+ c
.slen
< off
) {
273 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_TOO_LONG
);
285 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_TOO_LONG
);