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.]
61 #include "internal/cryptlib.h"
62 #include <openssl/buffer.h>
63 #include <openssl/asn1.h>
65 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
68 # ifndef OPENSSL_NO_STDIO
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);
106 void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
109 const unsigned char *p;
113 len = asn1_d2i_read_bio(in, &b);
117 p = (const unsigned char *)b->data;
118 ret = ASN1_item_d2i(x, &p, len, it);
124 #ifndef OPENSSL_NO_STDIO
125 void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
130 if ((b = BIO_new(BIO_s_file())) == NULL) {
131 ASN1err(ASN1_F_ASN1_ITEM_D2I_FP, ERR_R_BUF_LIB);
134 BIO_set_fp(b, in, BIO_NOCLOSE);
135 ret = ASN1_item_d2i_bio(it, b, x);
141 #define HEADER_SIZE 8
142 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
147 size_t want = HEADER_SIZE;
152 const unsigned char *q;
154 int inf, tag, xclass;
158 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
164 if (want >= (len - off)) {
167 if (len + want < len || !BUF_MEM_grow_clean(b, len + want)) {
168 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
171 i = BIO_read(in, &(b->data[len]), want);
172 if ((i < 0) && ((len - off) == 0)) {
173 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_NOT_ENOUGH_DATA);
178 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
184 /* else data already loaded */
186 p = (unsigned char *)&(b->data[off]);
188 inf = ASN1_get_object(&q, &slen, &tag, &xclass, len - off);
192 e = ERR_GET_REASON(ERR_peek_error());
193 if (e != ASN1_R_TOO_LONG)
196 ERR_clear_error(); /* clear error */
198 i = q - 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 && (slen == 0) && (tag == V_ASN1_EOC)) {
210 /* eos value, so go back and read another header */
217 /* suck in 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 + 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);