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diff --git a/src/lib/libcrypto/asn1/a_d2i_fp.c b/src/lib/libcrypto/asn1/a_d2i_fp.c
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1/* crypto/asn1/a_d2i_fp.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/buffer.h>
62#include <openssl/asn1_mac.h>
63
64static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
65
66#ifndef NO_OLD_ASN1
67#ifndef OPENSSL_NO_FP_API
68
69char *ASN1_d2i_fp(char *(*xnew)(), char *(*d2i)(), FILE *in,
70 unsigned char **x)
71 {
72 BIO *b;
73 char *ret;
74
75 if ((b=BIO_new(BIO_s_file())) == NULL)
76 {
77 ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
78 return(NULL);
79 }
80 BIO_set_fp(b,in,BIO_NOCLOSE);
81 ret=ASN1_d2i_bio(xnew,d2i,b,x);
82 BIO_free(b);
83 return(ret);
84 }
85#endif
86
87char *ASN1_d2i_bio(char *(*xnew)(), char *(*d2i)(), BIO *in,
88 unsigned char **x)
89 {
90 BUF_MEM *b = NULL;
91 unsigned char *p;
92 char *ret=NULL;
93 int len;
94
95 len = asn1_d2i_read_bio(in, &b);
96 if(len < 0) goto err;
97
98 p=(unsigned char *)b->data;
99 ret=d2i(x,&p,len);
100err:
101 if (b != NULL) BUF_MEM_free(b);
102 return(ret);
103 }
104
105#endif
106
107void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
108 {
109 BUF_MEM *b = NULL;
110 unsigned char *p;
111 void *ret=NULL;
112 int len;
113
114 len = asn1_d2i_read_bio(in, &b);
115 if(len < 0) goto err;
116
117 p=(unsigned char *)b->data;
118 ret=ASN1_item_d2i(x,&p,len, it);
119err:
120 if (b != NULL) BUF_MEM_free(b);
121 return(ret);
122 }
123
124#ifndef OPENSSL_NO_FP_API
125void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
126 {
127 BIO *b;
128 char *ret;
129
130 if ((b=BIO_new(BIO_s_file())) == NULL)
131 {
132 ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
133 return(NULL);
134 }
135 BIO_set_fp(b,in,BIO_NOCLOSE);
136 ret=ASN1_item_d2i_bio(it,b,x);
137 BIO_free(b);
138 return(ret);
139 }
140#endif
141
142#define HEADER_SIZE 8
143static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
144 {
145 BUF_MEM *b;
146 unsigned char *p;
147 int i;
148 int ret=-1;
149 ASN1_CTX c;
150 int want=HEADER_SIZE;
151 int eos=0;
152#if defined(__GNUC__) && defined(__ia64)
153 /* pathetic compiler bug in all known versions as of Nov. 2002 */
154 long off=0;
155#else
156 int off=0;
157#endif
158 int len=0;
159
160 b=BUF_MEM_new();
161 if (b == NULL)
162 {
163 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
164 return -1;
165 }
166
167 ERR_clear_error();
168 for (;;)
169 {
170 if (want >= (len-off))
171 {
172 want-=(len-off);
173
174 if (!BUF_MEM_grow_clean(b,len+want))
175 {
176 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
177 goto err;
178 }
179 i=BIO_read(in,&(b->data[len]),want);
180 if ((i < 0) && ((len-off) == 0))
181 {
182 ASN1err(ASN1_F_ASN1_D2I_BIO,ASN1_R_NOT_ENOUGH_DATA);
183 goto err;
184 }
185 if (i > 0)
186 len+=i;
187 }
188 /* else data already loaded */
189
190 p=(unsigned char *)&(b->data[off]);
191 c.p=p;
192 c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass),
193 len-off);
194 if (c.inf & 0x80)
195 {
196 unsigned long e;
197
198 e=ERR_GET_REASON(ERR_peek_error());
199 if (e != ASN1_R_TOO_LONG)
200 goto err;
201 else
202 ERR_get_error(); /* clear error */
203 }
204 i=c.p-p;/* header length */
205 off+=i; /* end of data */
206
207 if (c.inf & 1)
208 {
209 /* no data body so go round again */
210 eos++;
211 want=HEADER_SIZE;
212 }
213 else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
214 {
215 /* eos value, so go back and read another header */
216 eos--;
217 if (eos <= 0)
218 break;
219 else
220 want=HEADER_SIZE;
221 }
222 else
223 {
224 /* suck in c.slen bytes of data */
225 want=(int)c.slen;
226 if (want > (len-off))
227 {
228 want-=(len-off);
229 if (!BUF_MEM_grow_clean(b,len+want))
230 {
231 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
232 goto err;
233 }
234 while (want > 0)
235 {
236 i=BIO_read(in,&(b->data[len]),want);
237 if (i <= 0)
238 {
239 ASN1err(ASN1_F_ASN1_D2I_BIO,
240 ASN1_R_NOT_ENOUGH_DATA);
241 goto err;
242 }
243 len+=i;
244 want -= i;
245 }
246 }
247 off+=(int)c.slen;
248 if (eos <= 0)
249 {
250 break;
251 }
252 else
253 want=HEADER_SIZE;
254 }
255 }
256
257 *pb = b;
258 return off;
259err:
260 if (b != NULL) BUF_MEM_free(b);
261 return(ret);
262 }
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