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authorcvs2svn <admin@example.com>2015-08-02 21:54:22 +0000
committercvs2svn <admin@example.com>2015-08-02 21:54:22 +0000
commited3760bf4be4a96a89233fb8f8b84a0d44725862 (patch)
tree5609c82060f75c53af0a7641d9b33a88574876cd /src/lib/libcrypto/asn1/a_mbstr.c
parentf8b563fb5ba1524c821d37308f4e6abfc866bc3f (diff)
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This commit was manufactured by cvs2git to create tag 'OPENBSD_5_8_BASE'.OPENBSD_5_8_BASE
Diffstat (limited to 'src/lib/libcrypto/asn1/a_mbstr.c')
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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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1/* $OpenBSD: a_mbstr.c,v 1.22 2015/07/16 02:18:58 miod 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_locl.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}
93
94int
95ASN1_mbstring_ncopy(ASN1_STRING **out, const unsigned char *in, int len,
96 int inform, unsigned long mask, long minsize, long maxsize)
97{
98 int str_type;
99 int ret;
100 char free_out;
101 int outform, outlen = 0;
102 ASN1_STRING *dest;
103 unsigned char *p;
104 int nchar;
105 int (*cpyfunc)(unsigned long, void *) = NULL;
106
107 if (len < 0)
108 len = strlen((const char *)in);
109 if (!mask)
110 mask = DIRSTRING_TYPE;
111
112 /* First do a string check and work out the number of characters */
113 switch (inform) {
114 case MBSTRING_BMP:
115 if (len & 1) {
116 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,
117 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 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,
126 ASN1_R_INVALID_UNIVERSALSTRING_LENGTH);
127 return -1;
128 }
129 nchar = len >> 2;
130 break;
131
132 case MBSTRING_UTF8:
133 nchar = 0;
134 /* This counts the characters and does utf8 syntax checking */
135 ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar);
136 if (ret < 0) {
137 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,
138 ASN1_R_INVALID_UTF8STRING);
139 return -1;
140 }
141 break;
142
143 case MBSTRING_ASC:
144 nchar = len;
145 break;
146
147 default:
148 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_UNKNOWN_FORMAT);
149 return -1;
150 }
151
152 if ((minsize > 0) && (nchar < minsize)) {
153 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_SHORT);
154 ERR_asprintf_error_data("minsize=%ld", minsize);
155 return -1;
156 }
157
158 if ((maxsize > 0) && (nchar > maxsize)) {
159 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_LONG);
160 ERR_asprintf_error_data("maxsize=%ld", maxsize);
161 return -1;
162 }
163
164 /* Now work out minimal type (if any) */
165 if (traverse_string(in, len, inform, type_str, &mask) < 0) {
166 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_ILLEGAL_CHARACTERS);
167 return -1;
168 }
169
170
171 /* Now work out output format and string type */
172 outform = MBSTRING_ASC;
173 if (mask & B_ASN1_PRINTABLESTRING)
174 str_type = V_ASN1_PRINTABLESTRING;
175 else if (mask & B_ASN1_IA5STRING)
176 str_type = V_ASN1_IA5STRING;
177 else if (mask & B_ASN1_T61STRING)
178 str_type = V_ASN1_T61STRING;
179 else if (mask & B_ASN1_BMPSTRING) {
180 str_type = V_ASN1_BMPSTRING;
181 outform = MBSTRING_BMP;
182 } else if (mask & B_ASN1_UNIVERSALSTRING) {
183 str_type = V_ASN1_UNIVERSALSTRING;
184 outform = MBSTRING_UNIV;
185 } else {
186 str_type = V_ASN1_UTF8STRING;
187 outform = MBSTRING_UTF8;
188 }
189 if (!out)
190 return str_type;
191 if (*out) {
192 free_out = 0;
193 dest = *out;
194 if (dest->data) {
195 dest->length = 0;
196 free(dest->data);
197 dest->data = NULL;
198 }
199 dest->type = str_type;
200 } else {
201 free_out = 1;
202 dest = ASN1_STRING_type_new(str_type);
203 if (!dest) {
204 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,
205 ERR_R_MALLOC_FAILURE);
206 return -1;
207 }
208 *out = dest;
209 }
210 /* If both the same type just copy across */
211 if (inform == outform) {
212 if (!ASN1_STRING_set(dest, in, len)) {
213 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,
214 ERR_R_MALLOC_FAILURE);
215 goto err;
216 }
217 return str_type;
218 }
219
220 /* Work out how much space the destination will need */
221 switch (outform) {
222 case MBSTRING_ASC:
223 outlen = nchar;
224 cpyfunc = cpy_asc;
225 break;
226
227 case MBSTRING_BMP:
228 outlen = nchar << 1;
229 cpyfunc = cpy_bmp;
230 break;
231
232 case MBSTRING_UNIV:
233 outlen = nchar << 2;
234 cpyfunc = cpy_univ;
235 break;
236
237 case MBSTRING_UTF8:
238 outlen = 0;
239 if (traverse_string(in, len, inform, out_utf8, &outlen) < 0) {
240 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,
241 ASN1_R_ILLEGAL_CHARACTERS);
242 goto err;
243 }
244 cpyfunc = cpy_utf8;
245 break;
246 }
247 if (!(p = malloc(outlen + 1))) {
248 ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ERR_R_MALLOC_FAILURE);
249 goto err;
250 }
251 dest->length = outlen;
252 dest->data = p;
253 p[outlen] = 0;
254 traverse_string(in, len, inform, cpyfunc, &p);
255 return str_type;
256
257err:
258 if (free_out) {
259 ASN1_STRING_free(dest);
260 *out = NULL;
261 }
262 return -1;
263}
264
265/* This function traverses a string and passes the value of each character
266 * to an optional function along with a void * argument.
267 */
268
269static int
270traverse_string(const unsigned char *p, int len, int inform,
271 int (*rfunc)(unsigned long value, void *in), void *arg)
272{
273 unsigned long value;
274 int ret;
275
276 while (len) {
277 switch (inform) {
278 case MBSTRING_ASC:
279 value = *p++;
280 len--;
281 break;
282 case MBSTRING_BMP:
283 value = *p++ << 8;
284 value |= *p++;
285 /* BMP is explictly defined to not support surrogates */
286 if (UNICODE_IS_SURROGATE(value))
287 return -1;
288 len -= 2;
289 break;
290 case MBSTRING_UNIV:
291 value = (unsigned long)*p++ << 24;
292 value |= *p++ << 16;
293 value |= *p++ << 8;
294 value |= *p++;
295 if (value > UNICODE_MAX || UNICODE_IS_SURROGATE(value))
296 return -1;
297 len -= 4;
298 break;
299 default:
300 ret = UTF8_getc(p, len, &value);
301 if (ret < 0)
302 return -1;
303 len -= ret;
304 p += ret;
305 break;
306 }
307 if (rfunc) {
308 ret = rfunc(value, arg);
309 if (ret <= 0)
310 return ret;
311 }
312 }
313 return 1;
314}
315
316/* Various utility functions for traverse_string */
317
318/* Just count number of characters */
319
320static int
321in_utf8(unsigned long value, void *arg)
322{
323 int *nchar;
324
325 nchar = arg;
326 (*nchar)++;
327 return 1;
328}
329
330/* Determine size of output as a UTF8 String */
331
332static int
333out_utf8(unsigned long value, void *arg)
334{
335 int *outlen;
336 int ret;
337
338 outlen = arg;
339 ret = UTF8_putc(NULL, -1, value);
340 if (ret < 0)
341 return ret;
342 *outlen += ret;
343 return 1;
344}
345
346/* Determine the "type" of a string: check each character against a
347 * supplied "mask".
348 */
349
350static int
351type_str(unsigned long value, void *arg)
352{
353 unsigned long types;
354
355 types = *((unsigned long *)arg);
356 if ((types & B_ASN1_PRINTABLESTRING) && !is_printable(value))
357 types &= ~B_ASN1_PRINTABLESTRING;
358 if ((types & B_ASN1_IA5STRING) && (value > 127))
359 types &= ~B_ASN1_IA5STRING;
360 if ((types & B_ASN1_T61STRING) && (value > 0xff))
361 types &= ~B_ASN1_T61STRING;
362 if ((types & B_ASN1_BMPSTRING) && (value > 0xffff))
363 types &= ~B_ASN1_BMPSTRING;
364 if (!types)
365 return -1;
366 *((unsigned long *)arg) = types;
367 return 1;
368}
369
370/* Copy one byte per character ASCII like strings */
371
372static int
373cpy_asc(unsigned long value, void *arg)
374{
375 unsigned char **p, *q;
376
377 p = arg;
378 q = *p;
379 *q = value;
380 (*p)++;
381 return 1;
382}
383
384/* Copy two byte per character BMPStrings */
385
386static int
387cpy_bmp(unsigned long value, void *arg)
388{
389 unsigned char **p, *q;
390
391 p = arg;
392 q = *p;
393 *q++ = (value >> 8) & 0xff;
394 *q = value & 0xff;
395 *p += 2;
396 return 1;
397}
398
399/* Copy four byte per character UniversalStrings */
400
401static int
402cpy_univ(unsigned long value, void *arg)
403{
404 unsigned char **p, *q;
405
406 p = arg;
407 q = *p;
408 *q++ = (value >> 24) & 0xff;
409 *q++ = (value >> 16) & 0xff;
410 *q++ = (value >> 8) & 0xff;
411 *q = value & 0xff;
412 *p += 4;
413 return 1;
414}
415
416/* Copy to a UTF8String */
417
418static int
419cpy_utf8(unsigned long value, void *arg)
420{
421 unsigned char **p;
422
423 int ret;
424 p = arg;
425 /* We already know there is enough room so pass 0xff as the length */
426 ret = UTF8_putc(*p, 0xff, value);
427 *p += ret;
428 return 1;
429}
430
431/* Return 1 if the character is permitted in a PrintableString */
432static int
433is_printable(unsigned long value)
434{
435 int ch;
436
437 if (value > 0x7f)
438 return 0;
439 ch = (int)value;
440
441 /* Note: we can't use 'isalnum' because certain accented
442 * characters may count as alphanumeric in some environments.
443 */
444 if ((ch >= 'a') && (ch <= 'z'))
445 return 1;
446 if ((ch >= 'A') && (ch <= 'Z'))
447 return 1;
448 if ((ch >= '0') && (ch <= '9'))
449 return 1;
450 if ((ch == ' ') || strchr("'()+,-./:=?", ch))
451 return 1;
452 return 0;
453}
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