Remove references to o_time.h
[openssl.git] / crypto / asn1 / a_d2i_fp.c
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 <limits.h>
61 #include "cryptlib.h"
62 #include <openssl/buffer.h>
63 #include <openssl/asn1_mac.h>
64
65 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
66
67 #ifndef NO_OLD_ASN1
68 #ifndef OPENSSL_NO_FP_API
69
70 void *ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x)
71         {
72         BIO *b;
73         void *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
87 void *ASN1_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) goto err;
96
97         p=(unsigned char *)b->data;
98         ret=d2i(x,&p,len);
99 err:
100         if (b != NULL) BUF_MEM_free(b);
101         return(ret);
102         }
103
104 #endif
105
106 void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
107         {
108         BUF_MEM *b = NULL;
109         const unsigned char *p;
110         void *ret=NULL;
111         int len;
112
113         len = asn1_d2i_read_bio(in, &b);
114         if(len < 0) goto err;
115
116         p=(const unsigned char *)b->data;
117         ret=ASN1_item_d2i(x,&p,len, it);
118 err:
119         if (b != NULL) BUF_MEM_free(b);
120         return(ret);
121         }
122
123 #ifndef OPENSSL_NO_FP_API
124 void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
125         {
126         BIO *b;
127         char *ret;
128
129         if ((b=BIO_new(BIO_s_file())) == NULL)
130                 {
131                 ASN1err(ASN1_F_ASN1_ITEM_D2I_FP,ERR_R_BUF_LIB);
132                 return(NULL);
133                 }
134         BIO_set_fp(b,in,BIO_NOCLOSE);
135         ret=ASN1_item_d2i_bio(it,b,x);
136         BIO_free(b);
137         return(ret);
138         }
139 #endif
140
141 #define HEADER_SIZE   8
142 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
143         {
144         BUF_MEM *b;
145         unsigned char *p;
146         int i;
147         ASN1_const_CTX c;
148         size_t want=HEADER_SIZE;
149         int eos=0;
150         size_t off=0;
151         size_t len=0;
152
153         b=BUF_MEM_new();
154         if (b == NULL)
155                 {
156                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
157                 return -1;
158                 }
159
160         ERR_clear_error();
161         for (;;)
162                 {
163                 if (want >= (len-off))
164                         {
165                         want-=(len-off);
166
167                         if (len + want < len || !BUF_MEM_grow_clean(b,len+want))
168                                 {
169                                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
170                                 goto err;
171                                 }
172                         i=BIO_read(in,&(b->data[len]),want);
173                         if ((i < 0) && ((len-off) == 0))
174                                 {
175                                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_NOT_ENOUGH_DATA);
176                                 goto err;
177                                 }
178                         if (i > 0)
179                                 {
180                                 if (len+i < len)
181                                         {
182                                         ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
183                                         goto err;
184                                         }
185                                 len+=i;
186                                 }
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_clear_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                         if (eos < 0)
212                                 {
213                                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_HEADER_TOO_LONG);
214                                 goto err;
215                                 }
216                         want=HEADER_SIZE;
217                         }
218                 else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
219                         {
220                         /* eos value, so go back and read another header */
221                         eos--;
222                         if (eos <= 0)
223                                 break;
224                         else
225                                 want=HEADER_SIZE;
226                         }
227                 else 
228                         {
229                         /* suck in c.slen bytes of data */
230                         want=c.slen;
231                         if (want > (len-off))
232                                 {
233                                 want-=(len-off);
234                                 if (want > INT_MAX /* BIO_read takes an int length */ ||
235                                         len+want < len)
236                                                 {
237                                                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
238                                                 goto err;
239                                                 }
240                                 if (!BUF_MEM_grow_clean(b,len+want))
241                                         {
242                                         ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
243                                         goto err;
244                                         }
245                                 while (want > 0)
246                                         {
247                                         i=BIO_read(in,&(b->data[len]),want);
248                                         if (i <= 0)
249                                                 {
250                                                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
251                                                     ASN1_R_NOT_ENOUGH_DATA);
252                                                 goto err;
253                                                 }
254                                         /* This can't overflow because
255                                          * |len+want| didn't overflow. */
256                                         len+=i;
257                                         want-=i;
258                                         }
259                                 }
260                         if (off + c.slen < off)
261                                 {
262                                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
263                                 goto err;
264                                 }
265                         off+=c.slen;
266                         if (eos <= 0)
267                                 {
268                                 break;
269                                 }
270                         else
271                                 want=HEADER_SIZE;
272                         }
273                 }
274
275         if (off > INT_MAX)
276                 {
277                 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
278                 goto err;
279                 }
280
281         *pb = b;
282         return off;
283 err:
284         if (b != NULL) BUF_MEM_free(b);
285         return -1;
286         }