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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> | |
d9a9d10f | 60 | #include <limits.h> |
d02b48c6 | 61 | #include "cryptlib.h" |
ec577822 BM |
62 | #include <openssl/buffer.h> |
63 | #include <openssl/asn1_mac.h> | |
d02b48c6 | 64 | |
4e1209eb | 65 | static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb); |
d02b48c6 | 66 | |
4e1209eb | 67 | #ifndef NO_OLD_ASN1 |
4b618848 | 68 | #ifndef OPENSSL_NO_STDIO |
4e1209eb | 69 | |
45d10efc | 70 | void *ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x) |
d02b48c6 RE |
71 | { |
72 | BIO *b; | |
41a15c4f | 73 | void *ret; |
d02b48c6 RE |
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 | ||
45d10efc | 87 | void *ASN1_d2i_bio(void *(*xnew)(void), d2i_of_void *d2i, BIO *in, void **x) |
d02b48c6 | 88 | { |
4e1209eb | 89 | BUF_MEM *b = NULL; |
41a15c4f BL |
90 | const unsigned char *p; |
91 | void *ret=NULL; | |
4e1209eb DSH |
92 | int len; |
93 | ||
94 | len = asn1_d2i_read_bio(in, &b); | |
95 | if(len < 0) goto err; | |
96 | ||
22c3600e | 97 | p=(unsigned char *)b->data; |
4e1209eb DSH |
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; | |
875a644a | 109 | const unsigned char *p; |
4e1209eb DSH |
110 | void *ret=NULL; |
111 | int len; | |
112 | ||
113 | len = asn1_d2i_read_bio(in, &b); | |
114 | if(len < 0) goto err; | |
115 | ||
875a644a | 116 | p=(const unsigned char *)b->data; |
4e1209eb DSH |
117 | ret=ASN1_item_d2i(x,&p,len, it); |
118 | err: | |
119 | if (b != NULL) BUF_MEM_free(b); | |
120 | return(ret); | |
121 | } | |
122 | ||
4b618848 | 123 | #ifndef OPENSSL_NO_STDIO |
4e1209eb DSH |
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 | { | |
fbeaa3c4 | 131 | ASN1err(ASN1_F_ASN1_ITEM_D2I_FP,ERR_R_BUF_LIB); |
4e1209eb DSH |
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 | { | |
d02b48c6 RE |
144 | BUF_MEM *b; |
145 | unsigned char *p; | |
146 | int i; | |
875a644a | 147 | ASN1_const_CTX c; |
d9a9d10f | 148 | size_t want=HEADER_SIZE; |
d02b48c6 | 149 | int eos=0; |
d9a9d10f DSH |
150 | size_t off=0; |
151 | size_t len=0; | |
d02b48c6 RE |
152 | |
153 | b=BUF_MEM_new(); | |
154 | if (b == NULL) | |
155 | { | |
fbeaa3c4 | 156 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); |
4e1209eb | 157 | return -1; |
d02b48c6 RE |
158 | } |
159 | ||
58964a49 | 160 | ERR_clear_error(); |
d02b48c6 RE |
161 | for (;;) |
162 | { | |
163 | if (want >= (len-off)) | |
164 | { | |
165 | want-=(len-off); | |
166 | ||
d9a9d10f | 167 | if (len + want < len || !BUF_MEM_grow_clean(b,len+want)) |
d02b48c6 | 168 | { |
fbeaa3c4 | 169 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); |
d02b48c6 RE |
170 | goto err; |
171 | } | |
172 | i=BIO_read(in,&(b->data[len]),want); | |
173 | if ((i < 0) && ((len-off) == 0)) | |
174 | { | |
fbeaa3c4 | 175 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_NOT_ENOUGH_DATA); |
d02b48c6 RE |
176 | goto err; |
177 | } | |
178 | if (i > 0) | |
d9a9d10f DSH |
179 | { |
180 | if (len+i < len) | |
181 | { | |
182 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG); | |
183 | goto err; | |
184 | } | |
d02b48c6 | 185 | len+=i; |
d9a9d10f | 186 | } |
d02b48c6 RE |
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 | |
f763e0b5 | 202 | ERR_clear_error(); /* clear error */ |
d02b48c6 RE |
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++; | |
d9a9d10f DSH |
211 | if (eos < 0) |
212 | { | |
213 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_HEADER_TOO_LONG); | |
214 | goto err; | |
215 | } | |
d02b48c6 RE |
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 */ | |
d9a9d10f | 230 | want=c.slen; |
d02b48c6 RE |
231 | if (want > (len-off)) |
232 | { | |
233 | want-=(len-off); | |
d9a9d10f DSH |
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 | } | |
54a656ef | 240 | if (!BUF_MEM_grow_clean(b,len+want)) |
d02b48c6 | 241 | { |
fbeaa3c4 | 242 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); |
d02b48c6 RE |
243 | goto err; |
244 | } | |
2053c43d | 245 | while (want > 0) |
d02b48c6 | 246 | { |
2053c43d DSH |
247 | i=BIO_read(in,&(b->data[len]),want); |
248 | if (i <= 0) | |
249 | { | |
fbeaa3c4 | 250 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO, |
2053c43d DSH |
251 | ASN1_R_NOT_ENOUGH_DATA); |
252 | goto err; | |
253 | } | |
d9a9d10f DSH |
254 | /* This can't overflow because |
255 | * |len+want| didn't overflow. */ | |
2053c43d | 256 | len+=i; |
d9a9d10f | 257 | want-=i; |
d02b48c6 | 258 | } |
d02b48c6 | 259 | } |
d9a9d10f DSH |
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; | |
d02b48c6 RE |
266 | if (eos <= 0) |
267 | { | |
268 | break; | |
269 | } | |
270 | else | |
271 | want=HEADER_SIZE; | |
272 | } | |
273 | } | |
274 | ||
d9a9d10f DSH |
275 | if (off > INT_MAX) |
276 | { | |
277 | ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG); | |
278 | goto err; | |
279 | } | |
280 | ||
4e1209eb DSH |
281 | *pb = b; |
282 | return off; | |
d02b48c6 RE |
283 | err: |
284 | if (b != NULL) BUF_MEM_free(b); | |
d9a9d10f | 285 | return -1; |
d02b48c6 | 286 | } |