1 /* crypto/asn1/a_d2i_fp.c */
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/buffer.h>
63 #include <openssl/asn1_mac.h>
65 static int asn1_d2i_read_bio(BIO
*in
, BUF_MEM
**pb
);
68 # ifndef OPENSSL_NO_FP_API
70 void *ASN1_d2i_fp(void *(*xnew
) (void), d2i_of_void
*d2i
, FILE *in
, void **x
)
75 if ((b
= BIO_new(BIO_s_file())) == NULL
) {
76 ASN1err(ASN1_F_ASN1_D2I_FP
, ERR_R_BUF_LIB
);
79 BIO_set_fp(b
, in
, BIO_NOCLOSE
);
80 ret
= ASN1_d2i_bio(xnew
, d2i
, b
, x
);
86 void *ASN1_d2i_bio(void *(*xnew
) (void), d2i_of_void
*d2i
, BIO
*in
, void **x
)
89 const unsigned char *p
;
93 len
= asn1_d2i_read_bio(in
, &b
);
97 p
= (unsigned char *)b
->data
;
98 ret
= d2i(x
, &p
, len
);
107 void *ASN1_item_d2i_bio(const ASN1_ITEM
*it
, BIO
*in
, void *x
)
110 const unsigned char *p
;
114 len
= asn1_d2i_read_bio(in
, &b
);
118 p
= (const unsigned char *)b
->data
;
119 ret
= ASN1_item_d2i(x
, &p
, len
, it
);
126 #ifndef OPENSSL_NO_FP_API
127 void *ASN1_item_d2i_fp(const ASN1_ITEM
*it
, FILE *in
, void *x
)
132 if ((b
= BIO_new(BIO_s_file())) == NULL
) {
133 ASN1err(ASN1_F_ASN1_ITEM_D2I_FP
, ERR_R_BUF_LIB
);
136 BIO_set_fp(b
, in
, BIO_NOCLOSE
);
137 ret
= ASN1_item_d2i_bio(it
, b
, x
);
143 #define HEADER_SIZE 8
144 static int asn1_d2i_read_bio(BIO
*in
, BUF_MEM
**pb
)
150 size_t want
= HEADER_SIZE
;
157 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ERR_R_MALLOC_FAILURE
);
163 if (want
>= (len
- off
)) {
166 if (len
+ want
< len
|| !BUF_MEM_grow_clean(b
, len
+ want
)) {
167 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ERR_R_MALLOC_FAILURE
);
170 i
= BIO_read(in
, &(b
->data
[len
]), want
);
171 if ((i
< 0) && ((len
- off
) == 0)) {
172 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_NOT_ENOUGH_DATA
);
177 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_TOO_LONG
);
183 /* else data already loaded */
185 p
= (unsigned char *)&(b
->data
[off
]);
187 c
.inf
= ASN1_get_object(&(c
.p
), &(c
.slen
), &(c
.tag
), &(c
.xclass
),
192 e
= ERR_GET_REASON(ERR_peek_error());
193 if (e
!= ASN1_R_TOO_LONG
)
196 ERR_clear_error(); /* clear error */
198 i
= c
.p
- p
; /* header length */
199 off
+= i
; /* end of data */
202 /* no data body so go round again */
205 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_HEADER_TOO_LONG
);
209 } else if (eos
&& (c
.slen
== 0) && (c
.tag
== V_ASN1_EOC
)) {
210 /* eos value, so go back and read another header */
217 /* suck in c.slen bytes of data */
219 if (want
> (len
- off
)) {
221 if (want
> INT_MAX
/* BIO_read takes an int length */ ||
223 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_TOO_LONG
);
226 if (!BUF_MEM_grow_clean(b
, len
+ want
)) {
227 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ERR_R_MALLOC_FAILURE
);
231 i
= BIO_read(in
, &(b
->data
[len
]), want
);
233 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,
234 ASN1_R_NOT_ENOUGH_DATA
);
238 * This can't overflow because |len+want| didn't
245 if (off
+ c
.slen
< off
) {
246 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_TOO_LONG
);
258 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, ASN1_R_TOO_LONG
);