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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 "buffer.h"
62#include "asn1_mac.h"
63
64#define HEADER_SIZE 8
65
66#ifndef NO_FP_API
67char *ASN1_d2i_fp(xnew,d2i,in,x)
68char *(*xnew)();
69char *(*d2i)();
70FILE *in;
71unsigned char **x;
72 {
73 BIO *b;
74 char *ret;
75
76 if ((b=BIO_new(BIO_s_file())) == NULL)
77 {
78 ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
79 return(NULL);
80 }
81 BIO_set_fp(b,in,BIO_NOCLOSE);
82 ret=ASN1_d2i_bio(xnew,d2i,b,x);
83 BIO_free(b);
84 return(ret);
85 }
86#endif
87
88char *ASN1_d2i_bio(xnew,d2i,in,x)
89char *(*xnew)();
90char *(*d2i)();
91BIO *in;
92unsigned char **x;
93 {
94 BUF_MEM *b;
95 unsigned char *p;
96 int i;
97 char *ret=NULL;
98 ASN1_CTX c;
99 int want=HEADER_SIZE;
100 int eos=0;
101 int off=0;
102 int len=0;
103
104 b=BUF_MEM_new();
105 if (b == NULL)
106 {
107 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
108 return(NULL);
109 }
110
111 ERR_clear_error();
112 for (;;)
113 {
114 if (want >= (len-off))
115 {
116 want-=(len-off);
117
118 if (!BUF_MEM_grow(b,len+want))
119 {
120 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
121 goto err;
122 }
123 i=BIO_read(in,&(b->data[len]),want);
124 if ((i < 0) && ((len-off) == 0))
125 {
126 ASN1err(ASN1_F_ASN1_D2I_BIO,ASN1_R_NOT_ENOUGH_DATA);
127 goto err;
128 }
129 if (i > 0)
130 len+=i;
131 }
132 /* else data already loaded */
133
134 p=(unsigned char *)&(b->data[off]);
135 c.p=p;
136 c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass),
137 len-off);
138 if (c.inf & 0x80)
139 {
140 unsigned long e;
141
142 e=ERR_GET_REASON(ERR_peek_error());
143 if (e != ASN1_R_TOO_LONG)
144 goto err;
145 else
146 ERR_get_error(); /* clear error */
147 }
148 i=c.p-p;/* header length */
149 off+=i; /* end of data */
150
151 if (c.inf & 1)
152 {
153 /* no data body so go round again */
154 eos++;
155 want=HEADER_SIZE;
156 }
157 else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
158 {
159 /* eos value, so go back and read another header */
160 eos--;
161 if (eos <= 0)
162 break;
163 else
164 want=HEADER_SIZE;
165 }
166 else
167 {
168 /* suck in c.slen bytes of data */
169 want=(int)c.slen;
170 if (want > (len-off))
171 {
172 want-=(len-off);
173 if (!BUF_MEM_grow(b,len+want))
174 {
175 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
176 goto err;
177 }
178 i=BIO_read(in,&(b->data[len]),want);
179 if (i <= 0)
180 {
181 ASN1err(ASN1_F_ASN1_D2I_BIO,ASN1_R_NOT_ENOUGH_DATA);
182 goto err;
183 }
184 len+=i;
185 }
186 off+=(int)c.slen;
187 if (eos <= 0)
188 {
189 break;
190 }
191 else
192 want=HEADER_SIZE;
193 }
194 }
195
196 p=(unsigned char *)b->data;
197 ret=d2i(x,&p,off);
198err:
199 if (b != NULL) BUF_MEM_free(b);
200 return(ret);
201 }
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