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diff --git a/src/lib/libcrypto/asn1/a_object.c b/src/lib/libcrypto/asn1/a_object.c
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1/* $OpenBSD: a_object.c,v 1.24 2015/02/10 08:33:10 jsing Exp $ */
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 <limits.h>
60#include <stdio.h>
61#include <string.h>
62
63#include <openssl/asn1.h>
64#include <openssl/bn.h>
65#include <openssl/err.h>
66#include <openssl/buffer.h>
67#include <openssl/objects.h>
68
69int
70i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
71{
72 unsigned char *p;
73 int objsize;
74
75 if ((a == NULL) || (a->data == NULL))
76 return (0);
77
78 objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT);
79 if (pp == NULL)
80 return objsize;
81
82 p = *pp;
83 ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
84 memcpy(p, a->data, a->length);
85 p += a->length;
86
87 *pp = p;
88 return (objsize);
89}
90
91int
92a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
93{
94 int i, first, len = 0, c, use_bn;
95 char ftmp[24], *tmp = ftmp;
96 int tmpsize = sizeof ftmp;
97 const char *p;
98 unsigned long l;
99 BIGNUM *bl = NULL;
100
101 if (num == 0)
102 return (0);
103 else if (num == -1)
104 num = strlen(buf);
105
106 p = buf;
107 c = *(p++);
108 num--;
109 if ((c >= '0') && (c <= '2')) {
110 first= c-'0';
111 } else {
112 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_FIRST_NUM_TOO_LARGE);
113 goto err;
114 }
115
116 if (num <= 0) {
117 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_MISSING_SECOND_NUMBER);
118 goto err;
119 }
120 c = *(p++);
121 num--;
122 for (;;) {
123 if (num <= 0)
124 break;
125 if ((c != '.') && (c != ' ')) {
126 ASN1err(ASN1_F_A2D_ASN1_OBJECT,
127 ASN1_R_INVALID_SEPARATOR);
128 goto err;
129 }
130 l = 0;
131 use_bn = 0;
132 for (;;) {
133 if (num <= 0)
134 break;
135 num--;
136 c = *(p++);
137 if ((c == ' ') || (c == '.'))
138 break;
139 if ((c < '0') || (c > '9')) {
140 ASN1err(ASN1_F_A2D_ASN1_OBJECT,
141 ASN1_R_INVALID_DIGIT);
142 goto err;
143 }
144 if (!use_bn && l >= ((ULONG_MAX - 80) / 10L)) {
145 use_bn = 1;
146 if (!bl)
147 bl = BN_new();
148 if (!bl || !BN_set_word(bl, l))
149 goto err;
150 }
151 if (use_bn) {
152 if (!BN_mul_word(bl, 10L) ||
153 !BN_add_word(bl, c-'0'))
154 goto err;
155 } else
156 l = l * 10L + (long)(c - '0');
157 }
158 if (len == 0) {
159 if ((first < 2) && (l >= 40)) {
160 ASN1err(ASN1_F_A2D_ASN1_OBJECT,
161 ASN1_R_SECOND_NUMBER_TOO_LARGE);
162 goto err;
163 }
164 if (use_bn) {
165 if (!BN_add_word(bl, first * 40))
166 goto err;
167 } else
168 l += (long)first * 40;
169 }
170 i = 0;
171 if (use_bn) {
172 int blsize;
173 blsize = BN_num_bits(bl);
174 blsize = (blsize + 6) / 7;
175 if (blsize > tmpsize) {
176 if (tmp != ftmp)
177 free(tmp);
178 tmpsize = blsize + 32;
179 tmp = malloc(tmpsize);
180 if (!tmp)
181 goto err;
182 }
183 while (blsize--)
184 tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
185 } else {
186
187 for (;;) {
188 tmp[i++] = (unsigned char)l & 0x7f;
189 l >>= 7L;
190 if (l == 0L)
191 break;
192 }
193
194 }
195 if (out != NULL) {
196 if (len + i > olen) {
197 ASN1err(ASN1_F_A2D_ASN1_OBJECT,
198 ASN1_R_BUFFER_TOO_SMALL);
199 goto err;
200 }
201 while (--i > 0)
202 out[len++] = tmp[i]|0x80;
203 out[len++] = tmp[0];
204 } else
205 len += i;
206 }
207 if (tmp != ftmp)
208 free(tmp);
209 BN_free(bl);
210 return (len);
211
212err:
213 if (tmp != ftmp)
214 free(tmp);
215 BN_free(bl);
216 return (0);
217}
218
219int
220i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
221{
222 return OBJ_obj2txt(buf, buf_len, a, 0);
223}
224
225int
226i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
227{
228 char buf[80], *p = buf;
229 int i;
230
231 if ((a == NULL) || (a->data == NULL))
232 return(BIO_write(bp, "NULL",4));
233 i = i2t_ASN1_OBJECT(buf, sizeof buf, a);
234 if (i > (int)(sizeof(buf) - 1)) {
235 p = malloc(i + 1);
236 if (!p)
237 return -1;
238 i2t_ASN1_OBJECT(p, i + 1, a);
239 }
240 if (i <= 0)
241 return BIO_write(bp, "<INVALID>", 9);
242 BIO_write(bp, p, i);
243 if (p != buf)
244 free(p);
245 return (i);
246}
247
248ASN1_OBJECT *
249d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, long length)
250{
251 const unsigned char *p;
252 long len;
253 int tag, xclass;
254 int inf, i;
255 ASN1_OBJECT *ret = NULL;
256
257 p = *pp;
258 inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
259 if (inf & 0x80) {
260 i = ASN1_R_BAD_OBJECT_HEADER;
261 goto err;
262 }
263
264 if (tag != V_ASN1_OBJECT) {
265 i = ASN1_R_EXPECTING_AN_OBJECT;
266 goto err;
267 }
268 ret = c2i_ASN1_OBJECT(a, &p, len);
269 if (ret)
270 *pp = p;
271 return ret;
272
273err:
274 ASN1err(ASN1_F_D2I_ASN1_OBJECT, i);
275 return (NULL);
276}
277
278ASN1_OBJECT *
279c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp, long len)
280{
281 ASN1_OBJECT *ret = NULL;
282 const unsigned char *p;
283 unsigned char *data;
284 int i, length;
285
286 /*
287 * Sanity check OID encoding:
288 * - need at least one content octet
289 * - MSB must be clear in the last octet
290 * - can't have leading 0x80 in subidentifiers, see: X.690 8.19.2
291 */
292 if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL ||
293 p[len - 1] & 0x80) {
294 ASN1err(ASN1_F_C2I_ASN1_OBJECT, ASN1_R_INVALID_OBJECT_ENCODING);
295 return (NULL);
296 }
297
298 /* Now 0 < len <= INT_MAX, so the cast is safe. */
299 length = (int)len;
300 for (i = 0; i < length; i++, p++) {
301 if (*p == 0x80 && (!i || !(p[-1] & 0x80))) {
302 ASN1err(ASN1_F_C2I_ASN1_OBJECT,
303 ASN1_R_INVALID_OBJECT_ENCODING);
304 return NULL;
305 }
306 }
307
308 /* only the ASN1_OBJECTs from the 'table' will have values
309 * for ->sn or ->ln */
310 if ((a == NULL) || ((*a) == NULL) ||
311 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) {
312 if ((ret = ASN1_OBJECT_new()) == NULL)
313 return (NULL);
314 } else
315 ret = (*a);
316
317 p = *pp;
318 /* detach data from object */
319 data = (unsigned char *)ret->data;
320 ret->data = NULL;
321 /* once detached we can change it */
322 if ((data == NULL) || (ret->length < length)) {
323 ret->length = 0;
324 free(data);
325 data = malloc(length);
326 if (data == NULL) {
327 i = ERR_R_MALLOC_FAILURE;
328 goto err;
329 }
330 ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
331 }
332 memcpy(data, p, length);
333 /* reattach data to object, after which it remains const */
334 ret->data = data;
335 ret->length = length;
336 ret->sn = NULL;
337 ret->ln = NULL;
338 /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
339 p += length;
340
341 if (a != NULL)
342 (*a) = ret;
343 *pp = p;
344 return (ret);
345
346err:
347 ASN1err(ASN1_F_C2I_ASN1_OBJECT, i);
348 if ((ret != NULL) && ((a == NULL) || (*a != ret)))
349 ASN1_OBJECT_free(ret);
350 return (NULL);
351}
352
353ASN1_OBJECT *
354ASN1_OBJECT_new(void)
355{
356 ASN1_OBJECT *ret;
357
358 ret = malloc(sizeof(ASN1_OBJECT));
359 if (ret == NULL) {
360 ASN1err(ASN1_F_ASN1_OBJECT_NEW, ERR_R_MALLOC_FAILURE);
361 return (NULL);
362 }
363 ret->length = 0;
364 ret->data = NULL;
365 ret->nid = 0;
366 ret->sn = NULL;
367 ret->ln = NULL;
368 ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;
369 return (ret);
370}
371
372void
373ASN1_OBJECT_free(ASN1_OBJECT *a)
374{
375 if (a == NULL)
376 return;
377 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
378 free((void *)a->sn);
379 free((void *)a->ln);
380 a->sn = a->ln = NULL;
381 }
382 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
383 free((void *)a->data);
384 a->data = NULL;
385 a->length = 0;
386 }
387 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
388 free(a);
389}
390
391ASN1_OBJECT *
392ASN1_OBJECT_create(int nid, unsigned char *data, int len,
393 const char *sn, const char *ln)
394{
395 ASN1_OBJECT o;
396
397 o.sn = sn;
398 o.ln = ln;
399 o.data = data;
400 o.nid = nid;
401 o.length = len;
402 o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
403 ASN1_OBJECT_FLAG_DYNAMIC_DATA;
404 return (OBJ_dup(&o));
405}
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