File: | src/lib/libcrypto/asn1/a_enum.c |
Warning: | line 322, column 16 Array access (from variable 's') results in a null pointer dereference |
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1 | /* $OpenBSD: a_enum.c,v 1.23 2021/12/25 13:17:48 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 | |||||
62 | #include <openssl/asn1.h> | ||||
63 | #include <openssl/asn1t.h> | ||||
64 | #include <openssl/bn.h> | ||||
65 | #include <openssl/buffer.h> | ||||
66 | #include <openssl/err.h> | ||||
67 | |||||
68 | /* | ||||
69 | * Code for ENUMERATED type: identical to INTEGER apart from a different tag. | ||||
70 | * for comments on encoding see a_int.c | ||||
71 | */ | ||||
72 | |||||
73 | const ASN1_ITEM ASN1_ENUMERATED_it = { | ||||
74 | .itype = ASN1_ITYPE_PRIMITIVE0x0, | ||||
75 | .utype = V_ASN1_ENUMERATED10, | ||||
76 | .sname = "ASN1_ENUMERATED", | ||||
77 | }; | ||||
78 | |||||
79 | ASN1_ENUMERATED * | ||||
80 | ASN1_ENUMERATED_new(void) | ||||
81 | { | ||||
82 | return (ASN1_ENUMERATED *)ASN1_item_new(&ASN1_ENUMERATED_it); | ||||
83 | } | ||||
84 | |||||
85 | void | ||||
86 | ASN1_ENUMERATED_free(ASN1_ENUMERATED *a) | ||||
87 | { | ||||
88 | ASN1_item_free((ASN1_VALUE *)a, &ASN1_ENUMERATED_it); | ||||
89 | } | ||||
90 | |||||
91 | int | ||||
92 | ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v) | ||||
93 | { | ||||
94 | int j, k; | ||||
95 | unsigned int i; | ||||
96 | unsigned char buf[sizeof(long) + 1]; | ||||
97 | long d; | ||||
98 | |||||
99 | a->type = V_ASN1_ENUMERATED10; | ||||
100 | if (a->length < (int)(sizeof(long) + 1)) { | ||||
101 | free(a->data); | ||||
102 | a->data = calloc(1, sizeof(long) + 1); | ||||
103 | } | ||||
104 | if (a->data == NULL((void*)0)) { | ||||
105 | ASN1error(ERR_R_MALLOC_FAILURE)ERR_put_error(13,(0xfff),((1|64)),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,105); | ||||
106 | return (0); | ||||
107 | } | ||||
108 | d = v; | ||||
109 | if (d < 0) { | ||||
110 | d = -d; | ||||
111 | a->type = V_ASN1_NEG_ENUMERATED(10 | 0x100); | ||||
112 | } | ||||
113 | |||||
114 | for (i = 0; i < sizeof(long); i++) { | ||||
115 | if (d == 0) | ||||
116 | break; | ||||
117 | buf[i] = (int)d & 0xff; | ||||
118 | d >>= 8; | ||||
119 | } | ||||
120 | j = 0; | ||||
121 | for (k = i - 1; k >= 0; k--) | ||||
122 | a->data[j++] = buf[k]; | ||||
123 | a->length = j; | ||||
124 | return (1); | ||||
125 | } | ||||
126 | |||||
127 | long | ||||
128 | ASN1_ENUMERATED_get(const ASN1_ENUMERATED *a) | ||||
129 | { | ||||
130 | int neg = 0, i; | ||||
131 | unsigned long r = 0; | ||||
132 | |||||
133 | if (a == NULL((void*)0)) | ||||
134 | return (0L); | ||||
135 | i = a->type; | ||||
136 | if (i == V_ASN1_NEG_ENUMERATED(10 | 0x100)) | ||||
137 | neg = 1; | ||||
138 | else if (i != V_ASN1_ENUMERATED10) | ||||
139 | return -1; | ||||
140 | |||||
141 | if (a->length > (int)sizeof(long)) { | ||||
142 | /* hmm... a bit ugly */ | ||||
143 | return -1; | ||||
144 | } | ||||
145 | if (a->data == NULL((void*)0)) | ||||
146 | return 0; | ||||
147 | |||||
148 | for (i = 0; i < a->length; i++) { | ||||
149 | r <<= 8; | ||||
150 | r |= (unsigned char)a->data[i]; | ||||
151 | } | ||||
152 | |||||
153 | if (r > LONG_MAX9223372036854775807L) | ||||
154 | return -1; | ||||
155 | |||||
156 | if (neg) | ||||
157 | return -(long)r; | ||||
158 | return (long)r; | ||||
159 | } | ||||
160 | |||||
161 | ASN1_ENUMERATED * | ||||
162 | BN_to_ASN1_ENUMERATED(const BIGNUM *bn, ASN1_ENUMERATED *ai) | ||||
163 | { | ||||
164 | ASN1_ENUMERATED *ret; | ||||
165 | int len, j; | ||||
166 | |||||
167 | if (ai == NULL((void*)0)) | ||||
168 | ret = ASN1_ENUMERATED_new(); | ||||
169 | else | ||||
170 | ret = ai; | ||||
171 | if (ret == NULL((void*)0)) { | ||||
172 | ASN1error(ERR_R_NESTED_ASN1_ERROR)ERR_put_error(13,(0xfff),(58),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,172); | ||||
173 | goto err; | ||||
174 | } | ||||
175 | if (BN_is_negative(bn)) | ||||
176 | ret->type = V_ASN1_NEG_ENUMERATED(10 | 0x100); | ||||
177 | else | ||||
178 | ret->type = V_ASN1_ENUMERATED10; | ||||
179 | j = BN_num_bits(bn); | ||||
180 | len = ((j == 0) ? 0 : ((j / 8) + 1)); | ||||
181 | if (ret->length < len + 4) { | ||||
182 | unsigned char *new_data = realloc(ret->data, len + 4); | ||||
183 | if (!new_data) { | ||||
184 | ASN1error(ERR_R_MALLOC_FAILURE)ERR_put_error(13,(0xfff),((1|64)),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,184); | ||||
185 | goto err; | ||||
186 | } | ||||
187 | ret->data = new_data; | ||||
188 | } | ||||
189 | ret->length = BN_bn2bin(bn, ret->data); | ||||
190 | |||||
191 | /* Correct zero case */ | ||||
192 | if (!ret->length) { | ||||
193 | ret->data[0] = 0; | ||||
194 | ret->length = 1; | ||||
195 | } | ||||
196 | return (ret); | ||||
197 | |||||
198 | err: | ||||
199 | if (ret != ai) | ||||
200 | ASN1_ENUMERATED_free(ret); | ||||
201 | return (NULL((void*)0)); | ||||
202 | } | ||||
203 | |||||
204 | BIGNUM * | ||||
205 | ASN1_ENUMERATED_to_BN(const ASN1_ENUMERATED *ai, BIGNUM *bn) | ||||
206 | { | ||||
207 | BIGNUM *ret; | ||||
208 | |||||
209 | if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL((void*)0)) | ||||
210 | ASN1error(ASN1_R_BN_LIB)ERR_put_error(13,(0xfff),(105),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,210); | ||||
211 | else if (ai->type == V_ASN1_NEG_ENUMERATED(10 | 0x100)) | ||||
212 | BN_set_negative(ret, 1); | ||||
213 | return (ret); | ||||
214 | } | ||||
215 | |||||
216 | /* Based on a_int.c: equivalent ENUMERATED functions */ | ||||
217 | |||||
218 | int | ||||
219 | i2a_ASN1_ENUMERATED(BIO *bp, const ASN1_ENUMERATED *a) | ||||
220 | { | ||||
221 | int i, n = 0; | ||||
222 | static const char h[] = "0123456789ABCDEF"; | ||||
223 | char buf[2]; | ||||
224 | |||||
225 | if (a == NULL((void*)0)) | ||||
226 | return (0); | ||||
227 | |||||
228 | if (a->length == 0) { | ||||
229 | if (BIO_write(bp, "00", 2) != 2) | ||||
230 | goto err; | ||||
231 | n = 2; | ||||
232 | } else { | ||||
233 | for (i = 0; i < a->length; i++) { | ||||
234 | if ((i != 0) && (i % 35 == 0)) { | ||||
235 | if (BIO_write(bp, "\\\n", 2) != 2) | ||||
236 | goto err; | ||||
237 | n += 2; | ||||
238 | } | ||||
239 | buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f]; | ||||
240 | buf[1] = h[((unsigned char)a->data[i]) & 0x0f]; | ||||
241 | if (BIO_write(bp, buf, 2) != 2) | ||||
242 | goto err; | ||||
243 | n += 2; | ||||
244 | } | ||||
245 | } | ||||
246 | return (n); | ||||
247 | |||||
248 | err: | ||||
249 | return (-1); | ||||
250 | } | ||||
251 | |||||
252 | int | ||||
253 | a2i_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *bs, char *buf, int size) | ||||
254 | { | ||||
255 | int ret = 0; | ||||
256 | int i, j,k, m,n, again, bufsize; | ||||
257 | unsigned char *s = NULL((void*)0), *sp; | ||||
| |||||
258 | unsigned char *bufp; | ||||
259 | int first = 1; | ||||
260 | size_t num = 0, slen = 0; | ||||
261 | |||||
262 | bs->type = V_ASN1_ENUMERATED10; | ||||
263 | |||||
264 | bufsize = BIO_gets(bp, buf, size); | ||||
265 | for (;;) { | ||||
266 | if (bufsize < 1) | ||||
267 | goto err_sl; | ||||
268 | i = bufsize; | ||||
269 | if (buf[i-1] == '\n') | ||||
270 | buf[--i] = '\0'; | ||||
271 | if (i
| ||||
272 | goto err_sl; | ||||
273 | if (buf[i-1] == '\r') | ||||
274 | buf[--i] = '\0'; | ||||
275 | if (i
| ||||
276 | goto err_sl; | ||||
277 | if (buf[i - 1] == '\\') { | ||||
278 | i--; | ||||
279 | again = 1; | ||||
280 | } else | ||||
281 | again = 0; | ||||
282 | buf[i] = '\0'; | ||||
283 | if (i < 2) | ||||
284 | goto err_sl; | ||||
285 | |||||
286 | bufp = (unsigned char *)buf; | ||||
287 | if (first
| ||||
288 | first = 0; | ||||
289 | if ((bufp[0] == '0') && (buf[1] == '0')) { | ||||
290 | bufp += 2; | ||||
291 | i -= 2; | ||||
292 | } | ||||
293 | } | ||||
294 | k = 0; | ||||
295 | if (i % 2 != 0) { | ||||
296 | ASN1error(ASN1_R_ODD_NUMBER_OF_CHARS)ERR_put_error(13,(0xfff),(145),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,296); | ||||
297 | goto err; | ||||
298 | } | ||||
299 | i /= 2; | ||||
300 | if (num + i > slen) { | ||||
301 | sp = realloc(s, num + i); | ||||
302 | if (sp == NULL((void*)0)) { | ||||
303 | ASN1error(ERR_R_MALLOC_FAILURE)ERR_put_error(13,(0xfff),((1|64)),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,303); | ||||
304 | goto err; | ||||
305 | } | ||||
306 | s = sp; | ||||
307 | slen = num + i; | ||||
308 | } | ||||
309 | for (j = 0; j
| ||||
310 | for (n = 0; n < 2; n++) { | ||||
311 | m = bufp[k + n]; | ||||
312 | if ((m >= '0') && (m <= '9')) | ||||
313 | m -= '0'; | ||||
314 | else if ((m >= 'a') && (m <= 'f')) | ||||
315 | m = m - 'a' + 10; | ||||
316 | else if ((m >= 'A') && (m <= 'F')) | ||||
317 | m = m - 'A' + 10; | ||||
318 | else { | ||||
319 | ASN1error(ASN1_R_NON_HEX_CHARACTERS)ERR_put_error(13,(0xfff),(141),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,319); | ||||
320 | goto err; | ||||
321 | } | ||||
322 | s[num + j] <<= 4; | ||||
| |||||
323 | s[num + j] |= m; | ||||
324 | } | ||||
325 | } | ||||
326 | num += i; | ||||
327 | if (again
| ||||
328 | bufsize = BIO_gets(bp, buf, size); | ||||
329 | else | ||||
330 | break; | ||||
331 | } | ||||
332 | bs->length = num; | ||||
333 | bs->data = s; | ||||
334 | return (1); | ||||
335 | |||||
336 | err_sl: | ||||
337 | ASN1error(ASN1_R_SHORT_LINE)ERR_put_error(13,(0xfff),(150),"/usr/src/lib/libcrypto/asn1/a_enum.c" ,337); | ||||
338 | err: | ||||
339 | free(s); | ||||
340 | return (ret); | ||||
341 | } | ||||
342 | |||||
343 | int | ||||
344 | i2d_ASN1_ENUMERATED(ASN1_ENUMERATED *a, unsigned char **out) | ||||
345 | { | ||||
346 | return ASN1_item_i2d((ASN1_VALUE *)a, out, &ASN1_ENUMERATED_it); | ||||
347 | } | ||||
348 | |||||
349 | ASN1_ENUMERATED * | ||||
350 | d2i_ASN1_ENUMERATED(ASN1_ENUMERATED **a, const unsigned char **in, long len) | ||||
351 | { | ||||
352 | return (ASN1_ENUMERATED *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, | ||||
353 | &ASN1_ENUMERATED_it); | ||||
354 | } |