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3e575651 SL |
1 | /* crypto/asn1/a_bytes.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. | |
d3819813 | 8 | * |
3e575651 SL |
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). | |
d3819813 | 15 | * |
3e575651 SL |
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. | |
d3819813 | 22 | * |
3e575651 SL |
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 :-). | |
d3819813 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
3e575651 SL |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
d3819813 | 40 | * |
3e575651 SL |
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. | |
d3819813 | 52 | * |
3e575651 SL |
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" | |
61 | #include <openssl/asn1.h> | |
62 | ||
63 | static int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c); | |
d3819813 MTL |
64 | /* |
65 | * type is a 'bitmap' of acceptable string types. | |
3e575651 SL |
66 | */ |
67 | ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, const unsigned char **pp, | |
d3819813 MTL |
68 | long length, int type) |
69 | { | |
70 | ASN1_STRING *ret = NULL; | |
71 | const unsigned char *p; | |
72 | unsigned char *s; | |
73 | long len; | |
74 | int inf, tag, xclass; | |
75 | int i = 0; | |
3e575651 | 76 | |
d3819813 MTL |
77 | p = *pp; |
78 | inf = ASN1_get_object(&p, &len, &tag, &xclass, length); | |
79 | if (inf & 0x80) | |
80 | goto err; | |
3e575651 | 81 | |
d3819813 MTL |
82 | if (tag >= 32) { |
83 | i = ASN1_R_TAG_VALUE_TOO_HIGH; | |
84 | goto err; | |
85 | } | |
86 | if (!(ASN1_tag2bit(tag) & type)) { | |
87 | i = ASN1_R_WRONG_TYPE; | |
88 | goto err; | |
89 | } | |
3e575651 | 90 | |
d3819813 MTL |
91 | /* If a bit-string, exit early */ |
92 | if (tag == V_ASN1_BIT_STRING) | |
93 | return (d2i_ASN1_BIT_STRING(a, pp, length)); | |
3e575651 | 94 | |
d3819813 MTL |
95 | if ((a == NULL) || ((*a) == NULL)) { |
96 | if ((ret = ASN1_STRING_new()) == NULL) | |
97 | return (NULL); | |
98 | } else | |
99 | ret = (*a); | |
3e575651 | 100 | |
d3819813 MTL |
101 | if (len != 0) { |
102 | s = (unsigned char *)OPENSSL_malloc((int)len + 1); | |
103 | if (s == NULL) { | |
104 | i = ERR_R_MALLOC_FAILURE; | |
105 | goto err; | |
106 | } | |
107 | memcpy(s, p, (int)len); | |
108 | s[len] = '\0'; | |
109 | p += len; | |
110 | } else | |
111 | s = NULL; | |
3e575651 | 112 | |
d3819813 MTL |
113 | if (ret->data != NULL) |
114 | OPENSSL_free(ret->data); | |
115 | ret->length = (int)len; | |
116 | ret->data = s; | |
117 | ret->type = tag; | |
118 | if (a != NULL) | |
119 | (*a) = ret; | |
120 | *pp = p; | |
121 | return (ret); | |
122 | err: | |
123 | ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES, i); | |
124 | if ((ret != NULL) && ((a == NULL) || (*a != ret))) | |
125 | ASN1_STRING_free(ret); | |
126 | return (NULL); | |
127 | } | |
3e575651 SL |
128 | |
129 | int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass) | |
d3819813 MTL |
130 | { |
131 | int ret, r, constructed; | |
132 | unsigned char *p; | |
3e575651 | 133 | |
d3819813 MTL |
134 | if (a == NULL) |
135 | return (0); | |
3e575651 | 136 | |
d3819813 MTL |
137 | if (tag == V_ASN1_BIT_STRING) |
138 | return (i2d_ASN1_BIT_STRING(a, pp)); | |
3e575651 | 139 | |
d3819813 MTL |
140 | ret = a->length; |
141 | r = ASN1_object_size(0, ret, tag); | |
142 | if (pp == NULL) | |
143 | return (r); | |
144 | p = *pp; | |
3e575651 | 145 | |
d3819813 MTL |
146 | if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET)) |
147 | constructed = 1; | |
148 | else | |
149 | constructed = 0; | |
150 | ASN1_put_object(&p, constructed, ret, tag, xclass); | |
151 | memcpy(p, a->data, a->length); | |
152 | p += a->length; | |
153 | *pp = p; | |
154 | return (r); | |
155 | } | |
3e575651 | 156 | |
d3819813 MTL |
157 | ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, const unsigned char **pp, |
158 | long length, int Ptag, int Pclass) | |
159 | { | |
160 | ASN1_STRING *ret = NULL; | |
161 | const unsigned char *p; | |
162 | unsigned char *s; | |
163 | long len; | |
164 | int inf, tag, xclass; | |
165 | int i = 0; | |
3e575651 | 166 | |
d3819813 MTL |
167 | if ((a == NULL) || ((*a) == NULL)) { |
168 | if ((ret = ASN1_STRING_new()) == NULL) | |
169 | return (NULL); | |
170 | } else | |
171 | ret = (*a); | |
3e575651 | 172 | |
d3819813 MTL |
173 | p = *pp; |
174 | inf = ASN1_get_object(&p, &len, &tag, &xclass, length); | |
175 | if (inf & 0x80) { | |
176 | i = ASN1_R_BAD_OBJECT_HEADER; | |
177 | goto err; | |
178 | } | |
3e575651 | 179 | |
d3819813 MTL |
180 | if (tag != Ptag) { |
181 | i = ASN1_R_WRONG_TAG; | |
182 | goto err; | |
183 | } | |
3e575651 | 184 | |
d3819813 MTL |
185 | if (inf & V_ASN1_CONSTRUCTED) { |
186 | ASN1_const_CTX c; | |
3e575651 | 187 | |
d3819813 MTL |
188 | c.pp = pp; |
189 | c.p = p; | |
190 | c.inf = inf; | |
191 | c.slen = len; | |
192 | c.tag = Ptag; | |
193 | c.xclass = Pclass; | |
194 | c.max = (length == 0) ? 0 : (p + length); | |
195 | if (!asn1_collate_primitive(ret, &c)) | |
196 | goto err; | |
197 | else { | |
198 | p = c.p; | |
199 | } | |
200 | } else { | |
201 | if (len != 0) { | |
202 | if ((ret->length < len) || (ret->data == NULL)) { | |
d3819813 MTL |
203 | s = (unsigned char *)OPENSSL_malloc((int)len + 1); |
204 | if (s == NULL) { | |
205 | i = ERR_R_MALLOC_FAILURE; | |
206 | goto err; | |
207 | } | |
62f0afa2 MTL |
208 | if (ret->data != NULL) |
209 | OPENSSL_free(ret->data); | |
d3819813 MTL |
210 | } else |
211 | s = ret->data; | |
212 | memcpy(s, p, (int)len); | |
213 | s[len] = '\0'; | |
214 | p += len; | |
215 | } else { | |
216 | s = NULL; | |
217 | if (ret->data != NULL) | |
218 | OPENSSL_free(ret->data); | |
219 | } | |
3e575651 | 220 | |
d3819813 MTL |
221 | ret->length = (int)len; |
222 | ret->data = s; | |
223 | ret->type = Ptag; | |
224 | } | |
3e575651 | 225 | |
d3819813 MTL |
226 | if (a != NULL) |
227 | (*a) = ret; | |
228 | *pp = p; | |
229 | return (ret); | |
230 | err: | |
231 | if ((ret != NULL) && ((a == NULL) || (*a != ret))) | |
232 | ASN1_STRING_free(ret); | |
233 | ASN1err(ASN1_F_D2I_ASN1_BYTES, i); | |
234 | return (NULL); | |
235 | } | |
3e575651 | 236 | |
d3819813 MTL |
237 | /* |
238 | * We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse them | |
239 | * into the one structure that is then returned | |
240 | */ | |
241 | /* | |
242 | * There have been a few bug fixes for this function from Paul Keogh | |
243 | * <paul.keogh@sse.ie>, many thanks to him | |
244 | */ | |
3e575651 | 245 | static int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c) |
d3819813 MTL |
246 | { |
247 | ASN1_STRING *os = NULL; | |
248 | BUF_MEM b; | |
249 | int num; | |
3e575651 | 250 | |
d3819813 MTL |
251 | b.length = 0; |
252 | b.max = 0; | |
253 | b.data = NULL; | |
3e575651 | 254 | |
d3819813 MTL |
255 | if (a == NULL) { |
256 | c->error = ERR_R_PASSED_NULL_PARAMETER; | |
257 | goto err; | |
258 | } | |
3e575651 | 259 | |
d3819813 MTL |
260 | num = 0; |
261 | for (;;) { | |
262 | if (c->inf & 1) { | |
263 | c->eos = ASN1_const_check_infinite_end(&c->p, | |
264 | (long)(c->max - c->p)); | |
265 | if (c->eos) | |
266 | break; | |
267 | } else { | |
268 | if (c->slen <= 0) | |
269 | break; | |
270 | } | |
3e575651 | 271 | |
d3819813 MTL |
272 | c->q = c->p; |
273 | if (d2i_ASN1_bytes(&os, &c->p, c->max - c->p, c->tag, c->xclass) | |
274 | == NULL) { | |
275 | c->error = ERR_R_ASN1_LIB; | |
276 | goto err; | |
277 | } | |
3e575651 | 278 | |
d3819813 MTL |
279 | if (!BUF_MEM_grow_clean(&b, num + os->length)) { |
280 | c->error = ERR_R_BUF_LIB; | |
281 | goto err; | |
282 | } | |
283 | memcpy(&(b.data[num]), os->data, os->length); | |
284 | if (!(c->inf & 1)) | |
285 | c->slen -= (c->p - c->q); | |
286 | num += os->length; | |
287 | } | |
3e575651 | 288 | |
d3819813 MTL |
289 | if (!asn1_const_Finish(c)) |
290 | goto err; | |
3e575651 | 291 | |
d3819813 MTL |
292 | a->length = num; |
293 | if (a->data != NULL) | |
294 | OPENSSL_free(a->data); | |
295 | a->data = (unsigned char *)b.data; | |
296 | if (os != NULL) | |
297 | ASN1_STRING_free(os); | |
298 | return (1); | |
299 | err: | |
300 | ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE, c->error); | |
301 | if (os != NULL) | |
302 | ASN1_STRING_free(os); | |
303 | if (b.data != NULL) | |
304 | OPENSSL_free(b.data); | |
305 | return (0); | |
306 | } |