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-rw-r--r--src/lib/libcrypto/asn1/a_mbstr.c449
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diff --git a/src/lib/libcrypto/asn1/a_mbstr.c b/src/lib/libcrypto/asn1/a_mbstr.c
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--- a/src/lib/libcrypto/asn1/a_mbstr.c
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1/* $OpenBSD: a_mbstr.c,v 1.27 2023/07/05 21:23:36 beck Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 1999.
4 */
5/* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <ctype.h>
60#include <stdio.h>
61#include <string.h>
62
63#include <openssl/asn1.h>
64#include <openssl/err.h>
65
66#include "asn1_local.h"
67
68static int traverse_string(const unsigned char *p, int len, int inform,
69 int (*rfunc)(unsigned long value, void *in), void *arg);
70static int in_utf8(unsigned long value, void *arg);
71static int out_utf8(unsigned long value, void *arg);
72static int type_str(unsigned long value, void *arg);
73static int cpy_asc(unsigned long value, void *arg);
74static int cpy_bmp(unsigned long value, void *arg);
75static int cpy_univ(unsigned long value, void *arg);
76static int cpy_utf8(unsigned long value, void *arg);
77static int is_printable(unsigned long value);
78
79/* These functions take a string in UTF8, ASCII or multibyte form and
80 * a mask of permissible ASN1 string types. It then works out the minimal
81 * type (using the order Printable < IA5 < T61 < BMP < Universal < UTF8)
82 * and creates a string of the correct type with the supplied data.
83 * Yes this is horrible: it has to be :-(
84 * The 'ncopy' form checks minimum and maximum size limits too.
85 */
86
87int
88ASN1_mbstring_copy(ASN1_STRING **out, const unsigned char *in, int len,
89 int inform, unsigned long mask)
90{
91 return ASN1_mbstring_ncopy(out, in, len, inform, mask, 0, 0);
92}
93LCRYPTO_ALIAS(ASN1_mbstring_copy);
94
95int
96ASN1_mbstring_ncopy(ASN1_STRING **out, const unsigned char *in, int len,
97 int inform, unsigned long mask, long minsize, long maxsize)
98{
99 int str_type;
100 int ret;
101 char free_out;
102 int outform, outlen = 0;
103 ASN1_STRING *dest;
104 unsigned char *p;
105 int nchar;
106 int (*cpyfunc)(unsigned long, void *) = NULL;
107
108 if (len < 0)
109 len = strlen((const char *)in);
110 if (!mask)
111 mask = DIRSTRING_TYPE;
112
113 /* First do a string check and work out the number of characters */
114 switch (inform) {
115 case MBSTRING_BMP:
116 if (len & 1) {
117 ASN1error(ASN1_R_INVALID_BMPSTRING_LENGTH);
118 return -1;
119 }
120 nchar = len >> 1;
121 break;
122
123 case MBSTRING_UNIV:
124 if (len & 3) {
125 ASN1error(ASN1_R_INVALID_UNIVERSALSTRING_LENGTH);
126 return -1;
127 }
128 nchar = len >> 2;
129 break;
130
131 case MBSTRING_UTF8:
132 nchar = 0;
133 /* This counts the characters and does utf8 syntax checking */
134 ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar);
135 if (ret < 0) {
136 ASN1error(ASN1_R_INVALID_UTF8STRING);
137 return -1;
138 }
139 break;
140
141 case MBSTRING_ASC:
142 nchar = len;
143 break;
144
145 default:
146 ASN1error(ASN1_R_UNKNOWN_FORMAT);
147 return -1;
148 }
149
150 if ((minsize > 0) && (nchar < minsize)) {
151 ASN1error(ASN1_R_STRING_TOO_SHORT);
152 ERR_asprintf_error_data("minsize=%ld", minsize);
153 return -1;
154 }
155
156 if ((maxsize > 0) && (nchar > maxsize)) {
157 ASN1error(ASN1_R_STRING_TOO_LONG);
158 ERR_asprintf_error_data("maxsize=%ld", maxsize);
159 return -1;
160 }
161
162 /* Now work out minimal type (if any) */
163 if (traverse_string(in, len, inform, type_str, &mask) < 0) {
164 ASN1error(ASN1_R_ILLEGAL_CHARACTERS);
165 return -1;
166 }
167
168
169 /* Now work out output format and string type */
170 outform = MBSTRING_ASC;
171 if (mask & B_ASN1_PRINTABLESTRING)
172 str_type = V_ASN1_PRINTABLESTRING;
173 else if (mask & B_ASN1_IA5STRING)
174 str_type = V_ASN1_IA5STRING;
175 else if (mask & B_ASN1_T61STRING)
176 str_type = V_ASN1_T61STRING;
177 else if (mask & B_ASN1_BMPSTRING) {
178 str_type = V_ASN1_BMPSTRING;
179 outform = MBSTRING_BMP;
180 } else if (mask & B_ASN1_UNIVERSALSTRING) {
181 str_type = V_ASN1_UNIVERSALSTRING;
182 outform = MBSTRING_UNIV;
183 } else {
184 str_type = V_ASN1_UTF8STRING;
185 outform = MBSTRING_UTF8;
186 }
187 if (!out)
188 return str_type;
189 if (*out) {
190 free_out = 0;
191 dest = *out;
192 if (dest->data) {
193 dest->length = 0;
194 free(dest->data);
195 dest->data = NULL;
196 }
197 dest->type = str_type;
198 } else {
199 free_out = 1;
200 dest = ASN1_STRING_type_new(str_type);
201 if (!dest) {
202 ASN1error(ERR_R_MALLOC_FAILURE);
203 return -1;
204 }
205 *out = dest;
206 }
207 /* If both the same type just copy across */
208 if (inform == outform) {
209 if (!ASN1_STRING_set(dest, in, len)) {
210 ASN1error(ERR_R_MALLOC_FAILURE);
211 goto err;
212 }
213 return str_type;
214 }
215
216 /* Work out how much space the destination will need */
217 switch (outform) {
218 case MBSTRING_ASC:
219 outlen = nchar;
220 cpyfunc = cpy_asc;
221 break;
222
223 case MBSTRING_BMP:
224 outlen = nchar << 1;
225 cpyfunc = cpy_bmp;
226 break;
227
228 case MBSTRING_UNIV:
229 outlen = nchar << 2;
230 cpyfunc = cpy_univ;
231 break;
232
233 case MBSTRING_UTF8:
234 outlen = 0;
235 if (traverse_string(in, len, inform, out_utf8, &outlen) < 0) {
236 ASN1error(ASN1_R_ILLEGAL_CHARACTERS);
237 goto err;
238 }
239 cpyfunc = cpy_utf8;
240 break;
241 }
242 if (!(p = malloc(outlen + 1))) {
243 ASN1error(ERR_R_MALLOC_FAILURE);
244 goto err;
245 }
246 dest->length = outlen;
247 dest->data = p;
248 p[outlen] = 0;
249 traverse_string(in, len, inform, cpyfunc, &p);
250 return str_type;
251
252 err:
253 if (free_out) {
254 ASN1_STRING_free(dest);
255 *out = NULL;
256 }
257 return -1;
258}
259LCRYPTO_ALIAS(ASN1_mbstring_ncopy);
260
261/* This function traverses a string and passes the value of each character
262 * to an optional function along with a void * argument.
263 */
264
265static int
266traverse_string(const unsigned char *p, int len, int inform,
267 int (*rfunc)(unsigned long value, void *in), void *arg)
268{
269 unsigned long value;
270 int ret;
271
272 while (len) {
273 switch (inform) {
274 case MBSTRING_ASC:
275 value = *p++;
276 len--;
277 break;
278 case MBSTRING_BMP:
279 value = *p++ << 8;
280 value |= *p++;
281 /* BMP is explicitly defined to not support surrogates */
282 if (UNICODE_IS_SURROGATE(value))
283 return -1;
284 len -= 2;
285 break;
286 case MBSTRING_UNIV:
287 value = (unsigned long)*p++ << 24;
288 value |= *p++ << 16;
289 value |= *p++ << 8;
290 value |= *p++;
291 if (value > UNICODE_MAX || UNICODE_IS_SURROGATE(value))
292 return -1;
293 len -= 4;
294 break;
295 default:
296 ret = UTF8_getc(p, len, &value);
297 if (ret < 0)
298 return -1;
299 len -= ret;
300 p += ret;
301 break;
302 }
303 if (rfunc) {
304 ret = rfunc(value, arg);
305 if (ret <= 0)
306 return ret;
307 }
308 }
309 return 1;
310}
311
312/* Various utility functions for traverse_string */
313
314/* Just count number of characters */
315
316static int
317in_utf8(unsigned long value, void *arg)
318{
319 int *nchar;
320
321 nchar = arg;
322 (*nchar)++;
323 return 1;
324}
325
326/* Determine size of output as a UTF8 String */
327
328static int
329out_utf8(unsigned long value, void *arg)
330{
331 int *outlen;
332 int ret;
333
334 outlen = arg;
335 ret = UTF8_putc(NULL, -1, value);
336 if (ret < 0)
337 return ret;
338 *outlen += ret;
339 return 1;
340}
341
342/* Determine the "type" of a string: check each character against a
343 * supplied "mask".
344 */
345
346static int
347type_str(unsigned long value, void *arg)
348{
349 unsigned long types;
350
351 types = *((unsigned long *)arg);
352 if ((types & B_ASN1_PRINTABLESTRING) && !is_printable(value))
353 types &= ~B_ASN1_PRINTABLESTRING;
354 if ((types & B_ASN1_IA5STRING) && (value > 127))
355 types &= ~B_ASN1_IA5STRING;
356 if ((types & B_ASN1_T61STRING) && (value > 0xff))
357 types &= ~B_ASN1_T61STRING;
358 if ((types & B_ASN1_BMPSTRING) && (value > 0xffff))
359 types &= ~B_ASN1_BMPSTRING;
360 if (!types)
361 return -1;
362 *((unsigned long *)arg) = types;
363 return 1;
364}
365
366/* Copy one byte per character ASCII like strings */
367
368static int
369cpy_asc(unsigned long value, void *arg)
370{
371 unsigned char **p, *q;
372
373 p = arg;
374 q = *p;
375 *q = value;
376 (*p)++;
377 return 1;
378}
379
380/* Copy two byte per character BMPStrings */
381
382static int
383cpy_bmp(unsigned long value, void *arg)
384{
385 unsigned char **p, *q;
386
387 p = arg;
388 q = *p;
389 *q++ = (value >> 8) & 0xff;
390 *q = value & 0xff;
391 *p += 2;
392 return 1;
393}
394
395/* Copy four byte per character UniversalStrings */
396
397static int
398cpy_univ(unsigned long value, void *arg)
399{
400 unsigned char **p, *q;
401
402 p = arg;
403 q = *p;
404 *q++ = (value >> 24) & 0xff;
405 *q++ = (value >> 16) & 0xff;
406 *q++ = (value >> 8) & 0xff;
407 *q = value & 0xff;
408 *p += 4;
409 return 1;
410}
411
412/* Copy to a UTF8String */
413
414static int
415cpy_utf8(unsigned long value, void *arg)
416{
417 unsigned char **p;
418
419 int ret;
420 p = arg;
421 /* We already know there is enough room so pass 0xff as the length */
422 ret = UTF8_putc(*p, 0xff, value);
423 *p += ret;
424 return 1;
425}
426
427/* Return 1 if the character is permitted in a PrintableString */
428static int
429is_printable(unsigned long value)
430{
431 int ch;
432
433 if (value > 0x7f)
434 return 0;
435 ch = (int)value;
436
437 /* Note: we can't use 'isalnum' because certain accented
438 * characters may count as alphanumeric in some environments.
439 */
440 if ((ch >= 'a') && (ch <= 'z'))
441 return 1;
442 if ((ch >= 'A') && (ch <= 'Z'))
443 return 1;
444 if ((ch >= '0') && (ch <= '9'))
445 return 1;
446 if ((ch == ' ') || strchr("'()+,-./:=?", ch))
447 return 1;
448 return 0;
449}
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