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d02b48c6 | 1 | /* crypto/asn1/a_d2i_fp.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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" | |
ec577822 BM |
61 | #include <openssl/buffer.h> |
62 | #include <openssl/asn1_mac.h> | |
d02b48c6 | 63 | |
4e1209eb | 64 | static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb); |
d02b48c6 | 65 | |
4e1209eb | 66 | #ifndef NO_OLD_ASN1 |
cf1b7d96 | 67 | #ifndef OPENSSL_NO_FP_API |
4e1209eb | 68 | |
45d10efc | 69 | void *ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x) |
d02b48c6 RE |
70 | { |
71 | BIO *b; | |
41a15c4f | 72 | void *ret; |
d02b48c6 RE |
73 | |
74 | if ((b=BIO_new(BIO_s_file())) == NULL) | |
75 | { | |
76 | ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB); | |
77 | return(NULL); | |
78 | } | |
79 | BIO_set_fp(b,in,BIO_NOCLOSE); | |
80 | ret=ASN1_d2i_bio(xnew,d2i,b,x); | |
81 | BIO_free(b); | |
82 | return(ret); | |
83 | } | |
84 | #endif | |
85 | ||
45d10efc | 86 | void *ASN1_d2i_bio(void *(*xnew)(void), d2i_of_void *d2i, BIO *in, void **x) |
d02b48c6 | 87 | { |
4e1209eb | 88 | BUF_MEM *b = NULL; |
41a15c4f BL |
89 | const unsigned char *p; |
90 | void *ret=NULL; | |
4e1209eb DSH |
91 | int len; |
92 | ||
93 | len = asn1_d2i_read_bio(in, &b); | |
94 | if(len < 0) goto err; | |
95 | ||
22c3600e | 96 | p=(unsigned char *)b->data; |
4e1209eb DSH |
97 | ret=d2i(x,&p,len); |
98 | err: | |
99 | if (b != NULL) BUF_MEM_free(b); | |
100 | return(ret); | |
101 | } | |
102 | ||
103 | #endif | |
104 | ||
105 | void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x) | |
106 | { | |
107 | BUF_MEM *b = NULL; | |
875a644a | 108 | const unsigned char *p; |
4e1209eb DSH |
109 | void *ret=NULL; |
110 | int len; | |
111 | ||
112 | len = asn1_d2i_read_bio(in, &b); | |
113 | if(len < 0) goto err; | |
114 | ||
875a644a | 115 | p=(const unsigned char *)b->data; |
4e1209eb DSH |
116 | ret=ASN1_item_d2i(x,&p,len, it); |
117 | err: | |
118 | if (b != NULL) BUF_MEM_free(b); | |
119 | return(ret); | |
120 | } | |
121 | ||
cf1b7d96 | 122 | #ifndef OPENSSL_NO_FP_API |
4e1209eb DSH |
123 | void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x) |
124 | { | |
125 | BIO *b; | |
126 | char *ret; | |
127 | ||
128 | if ((b=BIO_new(BIO_s_file())) == NULL) | |
129 | { | |
fbeaa3c4 | 130 | ASN1err(ASN1_F_ASN1_ITEM_D2I_FP,ERR_R_BUF_LIB); |
4e1209eb DSH |
131 | return(NULL); |
132 | } | |
133 | BIO_set_fp(b,in,BIO_NOCLOSE); | |
134 | ret=ASN1_item_d2i_bio(it,b,x); | |
135 | BIO_free(b); | |
136 | return(ret); | |
137 | } | |
138 | #endif | |
139 | ||
140 | #define HEADER_SIZE 8 | |
141 | static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb) | |
142 | { | |
d02b48c6 RE |
143 | BUF_MEM *b; |
144 | unsigned char *p; | |
145 | int i; | |
4e1209eb | 146 | int ret=-1; |
875a644a | 147 | ASN1_const_CTX c; |
d02b48c6 RE |
148 | int want=HEADER_SIZE; |
149 | int eos=0; | |
bbf8198f AP |
150 | #if defined(__GNUC__) && defined(__ia64) |
151 | /* pathetic compiler bug in all known versions as of Nov. 2002 */ | |
152 | long off=0; | |
153 | #else | |
d02b48c6 | 154 | int off=0; |
bbf8198f | 155 | #endif |
d02b48c6 RE |
156 | int len=0; |
157 | ||
158 | b=BUF_MEM_new(); | |
159 | if (b == NULL) | |
160 | { | |
fbeaa3c4 | 161 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); |
4e1209eb | 162 | return -1; |
d02b48c6 RE |
163 | } |
164 | ||
58964a49 | 165 | ERR_clear_error(); |
d02b48c6 RE |
166 | for (;;) |
167 | { | |
168 | if (want >= (len-off)) | |
169 | { | |
170 | want-=(len-off); | |
171 | ||
54a656ef | 172 | if (!BUF_MEM_grow_clean(b,len+want)) |
d02b48c6 | 173 | { |
fbeaa3c4 | 174 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); |
d02b48c6 RE |
175 | goto err; |
176 | } | |
177 | i=BIO_read(in,&(b->data[len]),want); | |
178 | if ((i < 0) && ((len-off) == 0)) | |
179 | { | |
fbeaa3c4 | 180 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_NOT_ENOUGH_DATA); |
d02b48c6 RE |
181 | goto err; |
182 | } | |
183 | if (i > 0) | |
184 | len+=i; | |
185 | } | |
186 | /* else data already loaded */ | |
187 | ||
188 | p=(unsigned char *)&(b->data[off]); | |
189 | c.p=p; | |
190 | c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass), | |
191 | len-off); | |
192 | if (c.inf & 0x80) | |
193 | { | |
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 | |
f763e0b5 | 200 | ERR_clear_error(); /* clear error */ |
d02b48c6 RE |
201 | } |
202 | i=c.p-p;/* header length */ | |
203 | off+=i; /* end of data */ | |
204 | ||
205 | if (c.inf & 1) | |
206 | { | |
207 | /* no data body so go round again */ | |
208 | eos++; | |
209 | want=HEADER_SIZE; | |
210 | } | |
211 | else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC)) | |
212 | { | |
213 | /* eos value, so go back and read another header */ | |
214 | eos--; | |
215 | if (eos <= 0) | |
216 | break; | |
217 | else | |
218 | want=HEADER_SIZE; | |
219 | } | |
220 | else | |
221 | { | |
222 | /* suck in c.slen bytes of data */ | |
223 | want=(int)c.slen; | |
224 | if (want > (len-off)) | |
225 | { | |
226 | want-=(len-off); | |
54a656ef | 227 | if (!BUF_MEM_grow_clean(b,len+want)) |
d02b48c6 | 228 | { |
fbeaa3c4 | 229 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); |
d02b48c6 RE |
230 | goto err; |
231 | } | |
2053c43d | 232 | while (want > 0) |
d02b48c6 | 233 | { |
2053c43d DSH |
234 | i=BIO_read(in,&(b->data[len]),want); |
235 | if (i <= 0) | |
236 | { | |
fbeaa3c4 | 237 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO, |
2053c43d DSH |
238 | ASN1_R_NOT_ENOUGH_DATA); |
239 | goto err; | |
240 | } | |
241 | len+=i; | |
242 | want -= i; | |
d02b48c6 | 243 | } |
d02b48c6 RE |
244 | } |
245 | off+=(int)c.slen; | |
246 | if (eos <= 0) | |
247 | { | |
248 | break; | |
249 | } | |
250 | else | |
251 | want=HEADER_SIZE; | |
252 | } | |
253 | } | |
254 | ||
4e1209eb DSH |
255 | *pb = b; |
256 | return off; | |
d02b48c6 RE |
257 | err: |
258 | if (b != NULL) BUF_MEM_free(b); | |
259 | return(ret); | |
260 | } |