source: EcnlProtoTool/trunk/openssl-1.1.0e/crypto/asn1/a_strex.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 18.1 KB
RevLine 
[331]1/*
2 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include <string.h>
12#include "internal/cryptlib.h"
13#include "internal/asn1_int.h"
14#include <openssl/crypto.h>
15#include <openssl/x509.h>
16#include <openssl/asn1.h>
17
18#include "charmap.h"
19
20/*
21 * ASN1_STRING_print_ex() and X509_NAME_print_ex(). Enhanced string and name
22 * printing routines handling multibyte characters, RFC2253 and a host of
23 * other options.
24 */
25
26#define CHARTYPE_BS_ESC (ASN1_STRFLGS_ESC_2253 | CHARTYPE_FIRST_ESC_2253 | CHARTYPE_LAST_ESC_2253)
27
28#define ESC_FLAGS (ASN1_STRFLGS_ESC_2253 | \
29 ASN1_STRFLGS_ESC_2254 | \
30 ASN1_STRFLGS_ESC_QUOTE | \
31 ASN1_STRFLGS_ESC_CTRL | \
32 ASN1_STRFLGS_ESC_MSB)
33
34/*
35 * Three IO functions for sending data to memory, a BIO and and a FILE
36 * pointer.
37 */
38static int send_bio_chars(void *arg, const void *buf, int len)
39{
40 if (!arg)
41 return 1;
42 if (BIO_write(arg, buf, len) != len)
43 return 0;
44 return 1;
45}
46
47#ifndef OPENSSL_NO_STDIO
48static int send_fp_chars(void *arg, const void *buf, int len)
49{
50 if (!arg)
51 return 1;
52 if (fwrite(buf, 1, len, arg) != (unsigned int)len)
53 return 0;
54 return 1;
55}
56#endif
57
58typedef int char_io (void *arg, const void *buf, int len);
59
60/*
61 * This function handles display of strings, one character at a time. It is
62 * passed an unsigned long for each character because it could come from 2 or
63 * even 4 byte forms.
64 */
65
66static int do_esc_char(unsigned long c, unsigned char flags, char *do_quotes,
67 char_io *io_ch, void *arg)
68{
69 unsigned short chflgs;
70 unsigned char chtmp;
71 char tmphex[HEX_SIZE(long) + 3];
72
73 if (c > 0xffffffffL)
74 return -1;
75 if (c > 0xffff) {
76 BIO_snprintf(tmphex, sizeof tmphex, "\\W%08lX", c);
77 if (!io_ch(arg, tmphex, 10))
78 return -1;
79 return 10;
80 }
81 if (c > 0xff) {
82 BIO_snprintf(tmphex, sizeof tmphex, "\\U%04lX", c);
83 if (!io_ch(arg, tmphex, 6))
84 return -1;
85 return 6;
86 }
87 chtmp = (unsigned char)c;
88 if (chtmp > 0x7f)
89 chflgs = flags & ASN1_STRFLGS_ESC_MSB;
90 else
91 chflgs = char_type[chtmp] & flags;
92 if (chflgs & CHARTYPE_BS_ESC) {
93 /* If we don't escape with quotes, signal we need quotes */
94 if (chflgs & ASN1_STRFLGS_ESC_QUOTE) {
95 if (do_quotes)
96 *do_quotes = 1;
97 if (!io_ch(arg, &chtmp, 1))
98 return -1;
99 return 1;
100 }
101 if (!io_ch(arg, "\\", 1))
102 return -1;
103 if (!io_ch(arg, &chtmp, 1))
104 return -1;
105 return 2;
106 }
107 if (chflgs & (ASN1_STRFLGS_ESC_CTRL
108 | ASN1_STRFLGS_ESC_MSB
109 | ASN1_STRFLGS_ESC_2254)) {
110 BIO_snprintf(tmphex, 11, "\\%02X", chtmp);
111 if (!io_ch(arg, tmphex, 3))
112 return -1;
113 return 3;
114 }
115 /*
116 * If we get this far and do any escaping at all must escape the escape
117 * character itself: backslash.
118 */
119 if (chtmp == '\\' && flags & ESC_FLAGS) {
120 if (!io_ch(arg, "\\\\", 2))
121 return -1;
122 return 2;
123 }
124 if (!io_ch(arg, &chtmp, 1))
125 return -1;
126 return 1;
127}
128
129#define BUF_TYPE_WIDTH_MASK 0x7
130#define BUF_TYPE_CONVUTF8 0x8
131
132/*
133 * This function sends each character in a buffer to do_esc_char(). It
134 * interprets the content formats and converts to or from UTF8 as
135 * appropriate.
136 */
137
138static int do_buf(unsigned char *buf, int buflen,
139 int type, unsigned short flags, char *quotes, char_io *io_ch,
140 void *arg)
141{
142 int i, outlen, len;
143 unsigned short orflags;
144 unsigned char *p, *q;
145 unsigned long c;
146 p = buf;
147 q = buf + buflen;
148 outlen = 0;
149 while (p != q) {
150 if (p == buf && flags & ASN1_STRFLGS_ESC_2253)
151 orflags = CHARTYPE_FIRST_ESC_2253;
152 else
153 orflags = 0;
154 switch (type & BUF_TYPE_WIDTH_MASK) {
155 case 4:
156 c = ((unsigned long)*p++) << 24;
157 c |= ((unsigned long)*p++) << 16;
158 c |= ((unsigned long)*p++) << 8;
159 c |= *p++;
160 break;
161
162 case 2:
163 c = ((unsigned long)*p++) << 8;
164 c |= *p++;
165 break;
166
167 case 1:
168 c = *p++;
169 break;
170
171 case 0:
172 i = UTF8_getc(p, buflen, &c);
173 if (i < 0)
174 return -1; /* Invalid UTF8String */
175 p += i;
176 break;
177 default:
178 return -1; /* invalid width */
179 }
180 if (p == q && flags & ASN1_STRFLGS_ESC_2253)
181 orflags = CHARTYPE_LAST_ESC_2253;
182 if (type & BUF_TYPE_CONVUTF8) {
183 unsigned char utfbuf[6];
184 int utflen;
185 utflen = UTF8_putc(utfbuf, sizeof utfbuf, c);
186 for (i = 0; i < utflen; i++) {
187 /*
188 * We don't need to worry about setting orflags correctly
189 * because if utflen==1 its value will be correct anyway
190 * otherwise each character will be > 0x7f and so the
191 * character will never be escaped on first and last.
192 */
193 len =
194 do_esc_char(utfbuf[i], (unsigned short)(flags | orflags),
195 quotes, io_ch, arg);
196 if (len < 0)
197 return -1;
198 outlen += len;
199 }
200 } else {
201 len =
202 do_esc_char(c, (unsigned short)(flags | orflags), quotes,
203 io_ch, arg);
204 if (len < 0)
205 return -1;
206 outlen += len;
207 }
208 }
209 return outlen;
210}
211
212/* This function hex dumps a buffer of characters */
213
214static int do_hex_dump(char_io *io_ch, void *arg, unsigned char *buf,
215 int buflen)
216{
217 static const char hexdig[] = "0123456789ABCDEF";
218 unsigned char *p, *q;
219 char hextmp[2];
220 if (arg) {
221 p = buf;
222 q = buf + buflen;
223 while (p != q) {
224 hextmp[0] = hexdig[*p >> 4];
225 hextmp[1] = hexdig[*p & 0xf];
226 if (!io_ch(arg, hextmp, 2))
227 return -1;
228 p++;
229 }
230 }
231 return buflen << 1;
232}
233
234/*
235 * "dump" a string. This is done when the type is unknown, or the flags
236 * request it. We can either dump the content octets or the entire DER
237 * encoding. This uses the RFC2253 #01234 format.
238 */
239
240static int do_dump(unsigned long lflags, char_io *io_ch, void *arg,
241 const ASN1_STRING *str)
242{
243 /*
244 * Placing the ASN1_STRING in a temp ASN1_TYPE allows the DER encoding to
245 * readily obtained
246 */
247 ASN1_TYPE t;
248 unsigned char *der_buf, *p;
249 int outlen, der_len;
250
251 if (!io_ch(arg, "#", 1))
252 return -1;
253 /* If we don't dump DER encoding just dump content octets */
254 if (!(lflags & ASN1_STRFLGS_DUMP_DER)) {
255 outlen = do_hex_dump(io_ch, arg, str->data, str->length);
256 if (outlen < 0)
257 return -1;
258 return outlen + 1;
259 }
260 t.type = str->type;
261 t.value.ptr = (char *)str;
262 der_len = i2d_ASN1_TYPE(&t, NULL);
263 der_buf = OPENSSL_malloc(der_len);
264 if (der_buf == NULL)
265 return -1;
266 p = der_buf;
267 i2d_ASN1_TYPE(&t, &p);
268 outlen = do_hex_dump(io_ch, arg, der_buf, der_len);
269 OPENSSL_free(der_buf);
270 if (outlen < 0)
271 return -1;
272 return outlen + 1;
273}
274
275/*
276 * Lookup table to convert tags to character widths, 0 = UTF8 encoded, -1 is
277 * used for non string types otherwise it is the number of bytes per
278 * character
279 */
280
281static const signed char tag2nbyte[] = {
282 -1, -1, -1, -1, -1, /* 0-4 */
283 -1, -1, -1, -1, -1, /* 5-9 */
284 -1, -1, 0, -1, /* 10-13 */
285 -1, -1, -1, -1, /* 15-17 */
286 1, 1, 1, /* 18-20 */
287 -1, 1, 1, 1, /* 21-24 */
288 -1, 1, -1, /* 25-27 */
289 4, -1, 2 /* 28-30 */
290};
291
292/*
293 * This is the main function, print out an ASN1_STRING taking note of various
294 * escape and display options. Returns number of characters written or -1 if
295 * an error occurred.
296 */
297
298static int do_print_ex(char_io *io_ch, void *arg, unsigned long lflags,
299 const ASN1_STRING *str)
300{
301 int outlen, len;
302 int type;
303 char quotes;
304 unsigned short flags;
305 quotes = 0;
306 /* Keep a copy of escape flags */
307 flags = (unsigned short)(lflags & ESC_FLAGS);
308
309 type = str->type;
310
311 outlen = 0;
312
313 if (lflags & ASN1_STRFLGS_SHOW_TYPE) {
314 const char *tagname;
315 tagname = ASN1_tag2str(type);
316 outlen += strlen(tagname);
317 if (!io_ch(arg, tagname, outlen) || !io_ch(arg, ":", 1))
318 return -1;
319 outlen++;
320 }
321
322 /* Decide what to do with type, either dump content or display it */
323
324 /* Dump everything */
325 if (lflags & ASN1_STRFLGS_DUMP_ALL)
326 type = -1;
327 /* Ignore the string type */
328 else if (lflags & ASN1_STRFLGS_IGNORE_TYPE)
329 type = 1;
330 else {
331 /* Else determine width based on type */
332 if ((type > 0) && (type < 31))
333 type = tag2nbyte[type];
334 else
335 type = -1;
336 if ((type == -1) && !(lflags & ASN1_STRFLGS_DUMP_UNKNOWN))
337 type = 1;
338 }
339
340 if (type == -1) {
341 len = do_dump(lflags, io_ch, arg, str);
342 if (len < 0)
343 return -1;
344 outlen += len;
345 return outlen;
346 }
347
348 if (lflags & ASN1_STRFLGS_UTF8_CONVERT) {
349 /*
350 * Note: if string is UTF8 and we want to convert to UTF8 then we
351 * just interpret it as 1 byte per character to avoid converting
352 * twice.
353 */
354 if (!type)
355 type = 1;
356 else
357 type |= BUF_TYPE_CONVUTF8;
358 }
359
360 len = do_buf(str->data, str->length, type, flags, &quotes, io_ch, NULL);
361 if (len < 0)
362 return -1;
363 outlen += len;
364 if (quotes)
365 outlen += 2;
366 if (!arg)
367 return outlen;
368 if (quotes && !io_ch(arg, "\"", 1))
369 return -1;
370 if (do_buf(str->data, str->length, type, flags, NULL, io_ch, arg) < 0)
371 return -1;
372 if (quotes && !io_ch(arg, "\"", 1))
373 return -1;
374 return outlen;
375}
376
377/* Used for line indenting: print 'indent' spaces */
378
379static int do_indent(char_io *io_ch, void *arg, int indent)
380{
381 int i;
382 for (i = 0; i < indent; i++)
383 if (!io_ch(arg, " ", 1))
384 return 0;
385 return 1;
386}
387
388#define FN_WIDTH_LN 25
389#define FN_WIDTH_SN 10
390
391static int do_name_ex(char_io *io_ch, void *arg, const X509_NAME *n,
392 int indent, unsigned long flags)
393{
394 int i, prev = -1, orflags, cnt;
395 int fn_opt, fn_nid;
396 ASN1_OBJECT *fn;
397 const ASN1_STRING *val;
398 const X509_NAME_ENTRY *ent;
399 char objtmp[80];
400 const char *objbuf;
401 int outlen, len;
402 char *sep_dn, *sep_mv, *sep_eq;
403 int sep_dn_len, sep_mv_len, sep_eq_len;
404 if (indent < 0)
405 indent = 0;
406 outlen = indent;
407 if (!do_indent(io_ch, arg, indent))
408 return -1;
409 switch (flags & XN_FLAG_SEP_MASK) {
410 case XN_FLAG_SEP_MULTILINE:
411 sep_dn = "\n";
412 sep_dn_len = 1;
413 sep_mv = " + ";
414 sep_mv_len = 3;
415 break;
416
417 case XN_FLAG_SEP_COMMA_PLUS:
418 sep_dn = ",";
419 sep_dn_len = 1;
420 sep_mv = "+";
421 sep_mv_len = 1;
422 indent = 0;
423 break;
424
425 case XN_FLAG_SEP_CPLUS_SPC:
426 sep_dn = ", ";
427 sep_dn_len = 2;
428 sep_mv = " + ";
429 sep_mv_len = 3;
430 indent = 0;
431 break;
432
433 case XN_FLAG_SEP_SPLUS_SPC:
434 sep_dn = "; ";
435 sep_dn_len = 2;
436 sep_mv = " + ";
437 sep_mv_len = 3;
438 indent = 0;
439 break;
440
441 default:
442 return -1;
443 }
444
445 if (flags & XN_FLAG_SPC_EQ) {
446 sep_eq = " = ";
447 sep_eq_len = 3;
448 } else {
449 sep_eq = "=";
450 sep_eq_len = 1;
451 }
452
453 fn_opt = flags & XN_FLAG_FN_MASK;
454
455 cnt = X509_NAME_entry_count(n);
456 for (i = 0; i < cnt; i++) {
457 if (flags & XN_FLAG_DN_REV)
458 ent = X509_NAME_get_entry(n, cnt - i - 1);
459 else
460 ent = X509_NAME_get_entry(n, i);
461 if (prev != -1) {
462 if (prev == X509_NAME_ENTRY_set(ent)) {
463 if (!io_ch(arg, sep_mv, sep_mv_len))
464 return -1;
465 outlen += sep_mv_len;
466 } else {
467 if (!io_ch(arg, sep_dn, sep_dn_len))
468 return -1;
469 outlen += sep_dn_len;
470 if (!do_indent(io_ch, arg, indent))
471 return -1;
472 outlen += indent;
473 }
474 }
475 prev = X509_NAME_ENTRY_set(ent);
476 fn = X509_NAME_ENTRY_get_object(ent);
477 val = X509_NAME_ENTRY_get_data(ent);
478 fn_nid = OBJ_obj2nid(fn);
479 if (fn_opt != XN_FLAG_FN_NONE) {
480 int objlen, fld_len;
481 if ((fn_opt == XN_FLAG_FN_OID) || (fn_nid == NID_undef)) {
482 OBJ_obj2txt(objtmp, sizeof objtmp, fn, 1);
483 fld_len = 0; /* XXX: what should this be? */
484 objbuf = objtmp;
485 } else {
486 if (fn_opt == XN_FLAG_FN_SN) {
487 fld_len = FN_WIDTH_SN;
488 objbuf = OBJ_nid2sn(fn_nid);
489 } else if (fn_opt == XN_FLAG_FN_LN) {
490 fld_len = FN_WIDTH_LN;
491 objbuf = OBJ_nid2ln(fn_nid);
492 } else {
493 fld_len = 0; /* XXX: what should this be? */
494 objbuf = "";
495 }
496 }
497 objlen = strlen(objbuf);
498 if (!io_ch(arg, objbuf, objlen))
499 return -1;
500 if ((objlen < fld_len) && (flags & XN_FLAG_FN_ALIGN)) {
501 if (!do_indent(io_ch, arg, fld_len - objlen))
502 return -1;
503 outlen += fld_len - objlen;
504 }
505 if (!io_ch(arg, sep_eq, sep_eq_len))
506 return -1;
507 outlen += objlen + sep_eq_len;
508 }
509 /*
510 * If the field name is unknown then fix up the DER dump flag. We
511 * might want to limit this further so it will DER dump on anything
512 * other than a few 'standard' fields.
513 */
514 if ((fn_nid == NID_undef) && (flags & XN_FLAG_DUMP_UNKNOWN_FIELDS))
515 orflags = ASN1_STRFLGS_DUMP_ALL;
516 else
517 orflags = 0;
518
519 len = do_print_ex(io_ch, arg, flags | orflags, val);
520 if (len < 0)
521 return -1;
522 outlen += len;
523 }
524 return outlen;
525}
526
527/* Wrappers round the main functions */
528
529int X509_NAME_print_ex(BIO *out, const X509_NAME *nm, int indent,
530 unsigned long flags)
531{
532 if (flags == XN_FLAG_COMPAT)
533 return X509_NAME_print(out, nm, indent);
534 return do_name_ex(send_bio_chars, out, nm, indent, flags);
535}
536
537#ifndef OPENSSL_NO_STDIO
538int X509_NAME_print_ex_fp(FILE *fp, const X509_NAME *nm, int indent,
539 unsigned long flags)
540{
541 if (flags == XN_FLAG_COMPAT) {
542 BIO *btmp;
543 int ret;
544 btmp = BIO_new_fp(fp, BIO_NOCLOSE);
545 if (!btmp)
546 return -1;
547 ret = X509_NAME_print(btmp, nm, indent);
548 BIO_free(btmp);
549 return ret;
550 }
551 return do_name_ex(send_fp_chars, fp, nm, indent, flags);
552}
553#endif
554
555int ASN1_STRING_print_ex(BIO *out, const ASN1_STRING *str, unsigned long flags)
556{
557 return do_print_ex(send_bio_chars, out, flags, str);
558}
559
560#ifndef OPENSSL_NO_STDIO
561int ASN1_STRING_print_ex_fp(FILE *fp, const ASN1_STRING *str, unsigned long flags)
562{
563 return do_print_ex(send_fp_chars, fp, flags, str);
564}
565#endif
566
567/*
568 * Utility function: convert any string type to UTF8, returns number of bytes
569 * in output string or a negative error code
570 */
571
572int ASN1_STRING_to_UTF8(unsigned char **out, const ASN1_STRING *in)
573{
574 ASN1_STRING stmp, *str = &stmp;
575 int mbflag, type, ret;
576 if (!in)
577 return -1;
578 type = in->type;
579 if ((type < 0) || (type > 30))
580 return -1;
581 mbflag = tag2nbyte[type];
582 if (mbflag == -1)
583 return -1;
584 mbflag |= MBSTRING_FLAG;
585 stmp.data = NULL;
586 stmp.length = 0;
587 stmp.flags = 0;
588 ret =
589 ASN1_mbstring_copy(&str, in->data, in->length, mbflag,
590 B_ASN1_UTF8STRING);
591 if (ret < 0)
592 return ret;
593 *out = stmp.data;
594 return stmp.length;
595}
596
597/* Return 1 if host is a valid hostname and 0 otherwise */
598int asn1_valid_host(const ASN1_STRING *host)
599{
600 int hostlen = host->length;
601 const unsigned char *hostptr = host->data;
602 int type = host->type;
603 int i;
604 char width = -1;
605 unsigned short chflags = 0, prevchflags;
606
607 if (type > 0 && type < 31)
608 width = tag2nbyte[type];
609 if (width == -1 || hostlen == 0)
610 return 0;
611 /* Treat UTF8String as width 1 as any MSB set is invalid */
612 if (width == 0)
613 width = 1;
614 for (i = 0 ; i < hostlen; i+= width) {
615 prevchflags = chflags;
616 /* Value must be <= 0x7F: check upper bytes are all zeroes */
617 if (width == 4) {
618 if (*hostptr++ != 0 || *hostptr++ != 0 || *hostptr++ != 0)
619 return 0;
620 } else if (width == 2) {
621 if (*hostptr++ != 0)
622 return 0;
623 }
624 if (*hostptr > 0x7f)
625 return 0;
626 chflags = char_type[*hostptr++];
627 if (!(chflags & (CHARTYPE_HOST_ANY | CHARTYPE_HOST_WILD))) {
628 /* Nothing else allowed at start or end of string */
629 if (i == 0 || i == hostlen - 1)
630 return 0;
631 /* Otherwise invalid if not dot or hyphen */
632 if (!(chflags & (CHARTYPE_HOST_DOT | CHARTYPE_HOST_HYPHEN)))
633 return 0;
634 /*
635 * If previous is dot or hyphen then illegal unless both
636 * are hyphens: as .- -. .. are all illegal
637 */
638 if (prevchflags & (CHARTYPE_HOST_DOT | CHARTYPE_HOST_HYPHEN)
639 && ((prevchflags & CHARTYPE_HOST_DOT)
640 || (chflags & CHARTYPE_HOST_DOT)))
641 return 0;
642 }
643 }
644 return 1;
645}
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