1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
60 #include "internal/cryptlib.h"
61 #include <openssl/buffer.h>
62 #include <openssl/asn1.h>
64 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
67 # ifndef OPENSSL_NO_STDIO
69 void *ASN1_d2i_fp(void *(*xnew) (void), d2i_of_void *d2i, FILE *in, void **x)
74 if ((b = BIO_new(BIO_s_file())) == NULL) {
75 ASN1err(ASN1_F_ASN1_D2I_FP, ERR_R_BUF_LIB);
78 BIO_set_fp(b, in, BIO_NOCLOSE);
79 ret = ASN1_d2i_bio(xnew, d2i, b, x);
85 void *ASN1_d2i_bio(void *(*xnew) (void), d2i_of_void *d2i, BIO *in, void **x)
88 const unsigned char *p;
92 len = asn1_d2i_read_bio(in, &b);
96 p = (unsigned char *)b->data;
97 ret = d2i(x, &p, len);
105 void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
108 const unsigned char *p;
112 len = asn1_d2i_read_bio(in, &b);
116 p = (const unsigned char *)b->data;
117 ret = ASN1_item_d2i(x, &p, len, it);
123 #ifndef OPENSSL_NO_STDIO
124 void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
129 if ((b = BIO_new(BIO_s_file())) == NULL) {
130 ASN1err(ASN1_F_ASN1_ITEM_D2I_FP, ERR_R_BUF_LIB);
133 BIO_set_fp(b, in, BIO_NOCLOSE);
134 ret = ASN1_item_d2i_bio(it, b, x);
140 #define HEADER_SIZE 8
141 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
146 size_t want = HEADER_SIZE;
151 const unsigned char *q;
153 int inf, tag, xclass;
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 inf = ASN1_get_object(&q, &slen, &tag, &xclass, len - off);
191 e = ERR_GET_REASON(ERR_peek_error());
192 if (e != ASN1_R_TOO_LONG)
195 ERR_clear_error(); /* clear error */
197 i = q - p; /* header length */
198 off += i; /* end of data */
201 /* no data body so go round again */
204 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_HEADER_TOO_LONG);
208 } else if (eos && (slen == 0) && (tag == V_ASN1_EOC)) {
209 /* eos value, so go back and read another header */
216 /* suck in slen bytes of data */
218 if (want > (len - off)) {
220 if (want > INT_MAX /* BIO_read takes an int length */ ||
222 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
225 if (!BUF_MEM_grow_clean(b, len + want)) {
226 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
230 i = BIO_read(in, &(b->data[len]), want);
232 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
233 ASN1_R_NOT_ENOUGH_DATA);
237 * This can't overflow because |len+want| didn't
244 if (off + slen < off) {
245 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
257 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);