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authorcvs2svn <admin@example.com>2015-03-08 16:48:48 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:48 +0000
commitda1a9ad3a4a867ba6569c05e6fca66d7f296c553 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libcrypto/asn1/a_d2i_fp.c
parent973703db67a8e73d70e63afa8f2cde19da09144d (diff)
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This commit was manufactured by cvs2git to create tag 'OPENBSD_5_7_BASE'.OPENBSD_5_7_BASE
Diffstat (limited to 'src/lib/libcrypto/asn1/a_d2i_fp.c')
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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/* $OpenBSD: a_d2i_fp.c,v 1.11 2014/07/13 11:10:20 miod Exp $ */
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 <limits.h>
60#include <stdio.h>
61
62#include <openssl/asn1.h>
63#include <openssl/buffer.h>
64#include <openssl/err.h>
65
66static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
67
68#ifndef NO_OLD_ASN1
69
70void *
71ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x)
72{
73 BIO *b;
74 void *ret;
75
76 if ((b = BIO_new(BIO_s_file())) == NULL) {
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
86void *
87ASN1_d2i_bio(void *(*xnew)(void), d2i_of_void *d2i, BIO *in, void **x)
88{
89 BUF_MEM *b = NULL;
90 const unsigned char *p;
91 void *ret = NULL;
92 int len;
93
94 len = asn1_d2i_read_bio(in, &b);
95 if (len < 0)
96 goto err;
97
98 p = (unsigned char *)b->data;
99 ret = d2i(x, &p, len);
100
101err:
102 if (b != NULL)
103 BUF_MEM_free(b);
104 return (ret);
105}
106
107#endif
108
109void *
110ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
111{
112 BUF_MEM *b = NULL;
113 const unsigned char *p;
114 void *ret = NULL;
115 int len;
116
117 len = asn1_d2i_read_bio(in, &b);
118 if (len < 0)
119 goto err;
120
121 p = (const unsigned char *)b->data;
122 ret = ASN1_item_d2i(x, &p, len, it);
123
124err:
125 if (b != NULL)
126 BUF_MEM_free(b);
127 return (ret);
128}
129
130void *
131ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
132{
133 BIO *b;
134 char *ret;
135
136 if ((b = BIO_new(BIO_s_file())) == NULL) {
137 ASN1err(ASN1_F_ASN1_ITEM_D2I_FP, ERR_R_BUF_LIB);
138 return (NULL);
139 }
140 BIO_set_fp(b, in, BIO_NOCLOSE);
141 ret = ASN1_item_d2i_bio(it, b, x);
142 BIO_free(b);
143 return (ret);
144}
145
146#define HEADER_SIZE 8
147static int
148asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
149{
150 BUF_MEM *b;
151 unsigned char *p;
152 int i;
153 ASN1_const_CTX c;
154 size_t want = HEADER_SIZE;
155 int eos = 0;
156 size_t off = 0;
157 size_t len = 0;
158
159 b = BUF_MEM_new();
160 if (b == NULL) {
161 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
162 return -1;
163 }
164
165 ERR_clear_error();
166 for (;;) {
167 if (want >= (len - off)) {
168 want -= (len - off);
169
170 if (len + want < len || !BUF_MEM_grow_clean(b, len + want)) {
171 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
172 goto err;
173 }
174 i = BIO_read(in, &(b->data[len]), want);
175 if ((i < 0) && ((len - off) == 0)) {
176 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_NOT_ENOUGH_DATA);
177 goto err;
178 }
179 if (i > 0) {
180 if (len + i < len) {
181 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
182 goto err;
183 }
184 len += i;
185 }
186 }
187 /* else data already loaded */
188
189 p = (unsigned char *) & (b->data[off]);
190 c.p = p;
191 c.inf = ASN1_get_object(&(c.p), &(c.slen), &(c.tag),
192 &(c.xclass), len - off);
193 if (c.inf & 0x80) {
194 unsigned long e;
195
196 e = ERR_GET_REASON(ERR_peek_error());
197 if (e != ASN1_R_TOO_LONG)
198 goto err;
199 else
200 ERR_clear_error(); /* clear error */
201 }
202 i = c.p - p; /* header length */
203 off += i; /* end of data */
204
205 if (c.inf & 1) {
206 /* no data body so go round again */
207 eos++;
208 if (eos < 0) {
209 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_HEADER_TOO_LONG);
210 goto err;
211 }
212 want = HEADER_SIZE;
213 } else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC)) {
214 /* eos value, so go back and read another header */
215 eos--;
216 if (eos <= 0)
217 break;
218 else
219 want = HEADER_SIZE;
220 } else {
221 /* suck in c.slen bytes of data */
222 want = c.slen;
223 if (want > (len - off)) {
224 want -= (len - off);
225 if (want > INT_MAX /* BIO_read takes an int length */ ||
226 len+want < len) {
227 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
228 goto err;
229 }
230 if (!BUF_MEM_grow_clean(b, len + want)) {
231 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ERR_R_MALLOC_FAILURE);
232 goto err;
233 }
234 while (want > 0) {
235 i = BIO_read(in, &(b->data[len]), want);
236 if (i <= 0) {
237 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
238 ASN1_R_NOT_ENOUGH_DATA);
239 goto err;
240 }
241 /* This can't overflow because
242 * |len+want| didn't overflow. */
243 len += i;
244 want -= i;
245 }
246 }
247 if (off + c.slen < off) {
248 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
249 goto err;
250 }
251 off += c.slen;
252 if (eos <= 0) {
253 break;
254 } else
255 want = HEADER_SIZE;
256 }
257 }
258
259 if (off > INT_MAX) {
260 ASN1err(ASN1_F_ASN1_D2I_READ_BIO, ASN1_R_TOO_LONG);
261 goto err;
262 }
263
264 *pb = b;
265 return off;
266
267err:
268 if (b != NULL)
269 BUF_MEM_free(b);
270 return -1;
271}
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