1 /* crypto/asn1/a_d2i_fp.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
61 #include <openssl/buffer.h>
62 #include <openssl/asn1_mac.h>
64 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);
67 #ifndef OPENSSL_NO_FP_API
69 void *ASN1_d2i_fp(void *(*xnew)(void),
70 void *(*d2i)(void **,const unsigned char **,long), FILE *in,
76 if ((b=BIO_new(BIO_s_file())) == NULL)
78 ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
81 BIO_set_fp(b,in,BIO_NOCLOSE);
82 ret=ASN1_d2i_bio(xnew,d2i,b,x);
88 char *ASN1_d2i_bio(void *(*xnew)(void),
89 void *(*d2i)(void **,const unsigned char **,long), BIO *in,
93 const unsigned char *p;
97 len = asn1_d2i_read_bio(in, &b);
103 if (b != NULL) BUF_MEM_free(b);
109 void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
112 const unsigned char *p;
116 len = asn1_d2i_read_bio(in, &b);
117 if(len < 0) goto err;
119 p=(const unsigned char *)b->data;
120 ret=ASN1_item_d2i(x,&p,len, it);
122 if (b != NULL) BUF_MEM_free(b);
126 #ifndef OPENSSL_NO_FP_API
127 void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
132 if ((b=BIO_new(BIO_s_file())) == NULL)
134 ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
137 BIO_set_fp(b,in,BIO_NOCLOSE);
138 ret=ASN1_item_d2i_bio(it,b,x);
144 #define HEADER_SIZE 8
145 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
152 int want=HEADER_SIZE;
154 #if defined(__GNUC__) && defined(__ia64)
155 /* pathetic compiler bug in all known versions as of Nov. 2002 */
165 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
172 if (want >= (len-off))
176 if (!BUF_MEM_grow_clean(b,len+want))
178 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
181 i=BIO_read(in,&(b->data[len]),want);
182 if ((i < 0) && ((len-off) == 0))
184 ASN1err(ASN1_F_ASN1_D2I_BIO,ASN1_R_NOT_ENOUGH_DATA);
190 /* else data already loaded */
192 p=(unsigned char *)&(b->data[off]);
194 c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass),
200 e=ERR_GET_REASON(ERR_peek_error());
201 if (e != ASN1_R_TOO_LONG)
204 ERR_get_error(); /* clear error */
206 i=c.p-p;/* header length */
207 off+=i; /* end of data */
211 /* no data body so go round again */
215 else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
217 /* eos value, so go back and read another header */
226 /* suck in c.slen bytes of data */
228 if (want > (len-off))
231 if (!BUF_MEM_grow_clean(b,len+want))
233 ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE);
238 i=BIO_read(in,&(b->data[len]),want);
241 ASN1err(ASN1_F_ASN1_D2I_BIO,
242 ASN1_R_NOT_ENOUGH_DATA);
262 if (b != NULL) BUF_MEM_free(b);