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source: vbox/trunk/src/libs/openssl-3.1.4/crypto/x509/x_name.c@ 102863

Last change on this file since 102863 was 102863, checked in by vboxsync, 13 months ago

openssl-3.1.4: Applied and adjusted our OpenSSL changes to 3.1.3. bugref:10577
File size: 15.8 KB
Line 
1/*
2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 "crypto/ctype.h"
12#include "internal/cryptlib.h"
13#include <openssl/asn1t.h>
14#include <openssl/x509.h>
15#include "crypto/x509.h"
16#include "crypto/asn1.h"
17#include "x509_local.h"
18
19/*
20 * Maximum length of X509_NAME: much larger than anything we should
21 * ever see in practice.
22 */
23
24#define X509_NAME_MAX (1024 * 1024)
25
26static int x509_name_ex_d2i(ASN1_VALUE **val,
27 const unsigned char **in, long len,
28 const ASN1_ITEM *it,
29 int tag, int aclass, char opt, ASN1_TLC *ctx);
30
31static int x509_name_ex_i2d(const ASN1_VALUE **val, unsigned char **out,
32 const ASN1_ITEM *it, int tag, int aclass);
33static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
34static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
35
36static int x509_name_encode(X509_NAME *a);
37static int x509_name_canon(X509_NAME *a);
38static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in);
39static int i2d_name_canon(const STACK_OF(STACK_OF_X509_NAME_ENTRY) * intname,
40 unsigned char **in);
41
42static int x509_name_ex_print(BIO *out, const ASN1_VALUE **pval,
43 int indent,
44 const char *fname, const ASN1_PCTX *pctx);
45
46ASN1_SEQUENCE(X509_NAME_ENTRY) = {
47 ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
48 ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
49} ASN1_SEQUENCE_END(X509_NAME_ENTRY)
50
51IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
52IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
53
54/*
55 * For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY } so
56 * declare two template wrappers for this
57 */
58
59ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
60 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
61static_ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
62
63ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
64 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
65static_ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
66
67/*
68 * Normally that's where it would end: we'd have two nested STACK structures
69 * representing the ASN1. Unfortunately X509_NAME uses a completely different
70 * form and caches encodings so we have to process the internal form and
71 * convert to the external form.
72 */
73
74static const ASN1_EXTERN_FUNCS x509_name_ff = {
75 NULL,
76 x509_name_ex_new,
77 x509_name_ex_free,
78 0, /* Default clear behaviour is OK */
79 x509_name_ex_d2i,
80 x509_name_ex_i2d,
81 x509_name_ex_print
82};
83
84IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
85
86IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
87
88IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
89
90static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
91{
92 X509_NAME *ret = OPENSSL_zalloc(sizeof(*ret));
93
94 if (ret == NULL)
95 goto memerr;
96 if ((ret->entries = sk_X509_NAME_ENTRY_new_null()) == NULL)
97 goto memerr;
98 if ((ret->bytes = BUF_MEM_new()) == NULL)
99 goto memerr;
100 ret->modified = 1;
101 *val = (ASN1_VALUE *)ret;
102 return 1;
103
104 memerr:
105 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
106 if (ret) {
107 sk_X509_NAME_ENTRY_free(ret->entries);
108 OPENSSL_free(ret);
109 }
110 return 0;
111}
112
113static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
114{
115 X509_NAME *a;
116
117 if (pval == NULL || *pval == NULL)
118 return;
119 a = (X509_NAME *)*pval;
120
121 BUF_MEM_free(a->bytes);
122 sk_X509_NAME_ENTRY_pop_free(a->entries, X509_NAME_ENTRY_free);
123 OPENSSL_free(a->canon_enc);
124 OPENSSL_free(a);
125 *pval = NULL;
126}
127
128static void local_sk_X509_NAME_ENTRY_free(STACK_OF(X509_NAME_ENTRY) *ne)
129{
130 sk_X509_NAME_ENTRY_free(ne);
131}
132
133static void local_sk_X509_NAME_ENTRY_pop_free(STACK_OF(X509_NAME_ENTRY) *ne)
134{
135 sk_X509_NAME_ENTRY_pop_free(ne, X509_NAME_ENTRY_free);
136}
137
138static int x509_name_ex_d2i(ASN1_VALUE **val,
139 const unsigned char **in, long len,
140 const ASN1_ITEM *it, int tag, int aclass,
141 char opt, ASN1_TLC *ctx)
142{
143 const unsigned char *p = *in, *q;
144 union {
145 STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
146 ASN1_VALUE *a;
147 } intname = {
148 NULL
149 };
150 union {
151 X509_NAME *x;
152 ASN1_VALUE *a;
153 } nm = {
154 NULL
155 };
156 int i, j, ret;
157 STACK_OF(X509_NAME_ENTRY) *entries;
158 X509_NAME_ENTRY *entry;
159
160 if (len > X509_NAME_MAX)
161 len = X509_NAME_MAX;
162 q = p;
163
164 /* Get internal representation of Name */
165 ret = ASN1_item_ex_d2i(&intname.a,
166 &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
167 tag, aclass, opt, ctx);
168
169 if (ret <= 0)
170 return ret;
171
172 if (*val)
173 x509_name_ex_free(val, NULL);
174 if (!x509_name_ex_new(&nm.a, NULL))
175 goto err;
176 /* We've decoded it: now cache encoding */
177 if (!BUF_MEM_grow(nm.x->bytes, p - q))
178 goto err;
179 memcpy(nm.x->bytes->data, q, p - q);
180
181 /* Convert internal representation to X509_NAME structure */
182 for (i = 0; i < sk_STACK_OF_X509_NAME_ENTRY_num(intname.s); i++) {
183 entries = sk_STACK_OF_X509_NAME_ENTRY_value(intname.s, i);
184 for (j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
185 entry = sk_X509_NAME_ENTRY_value(entries, j);
186 entry->set = i;
187 if (!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))
188 goto err;
189 (void)sk_X509_NAME_ENTRY_set(entries, j, NULL);
190 }
191 }
192 ret = x509_name_canon(nm.x);
193 if (!ret)
194 goto err;
195 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
196 local_sk_X509_NAME_ENTRY_free);
197 nm.x->modified = 0;
198 *val = nm.a;
199 *in = p;
200 return ret;
201
202 err:
203 if (nm.x != NULL)
204 X509_NAME_free(nm.x);
205 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
206 local_sk_X509_NAME_ENTRY_pop_free);
207 ERR_raise(ERR_LIB_ASN1, ERR_R_NESTED_ASN1_ERROR);
208 return 0;
209}
210
211static int x509_name_ex_i2d(const ASN1_VALUE **val, unsigned char **out,
212 const ASN1_ITEM *it, int tag, int aclass)
213{
214 int ret;
215 X509_NAME *a = (X509_NAME *)*val;
216
217 if (a->modified) {
218 ret = x509_name_encode(a);
219 if (ret < 0)
220 return ret;
221 ret = x509_name_canon(a);
222 if (!ret)
223 return -1;
224 }
225 ret = a->bytes->length;
226 if (out != NULL) {
227 memcpy(*out, a->bytes->data, ret);
228 *out += ret;
229 }
230 return ret;
231}
232
233static int x509_name_encode(X509_NAME *a)
234{
235 union {
236 STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
237 const ASN1_VALUE *a;
238 } intname = {
239 NULL
240 };
241 int len;
242 unsigned char *p;
243 STACK_OF(X509_NAME_ENTRY) *entries = NULL;
244 X509_NAME_ENTRY *entry;
245 int i, set = -1;
246
247 intname.s = sk_STACK_OF_X509_NAME_ENTRY_new_null();
248 if (!intname.s)
249 goto memerr;
250 for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
251 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
252 if (entry->set != set) {
253 entries = sk_X509_NAME_ENTRY_new_null();
254 if (!entries)
255 goto memerr;
256 if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname.s, entries)) {
257 sk_X509_NAME_ENTRY_free(entries);
258 goto memerr;
259 }
260 set = entry->set;
261 }
262 if (!sk_X509_NAME_ENTRY_push(entries, entry))
263 goto memerr;
264 }
265 len = ASN1_item_ex_i2d(&intname.a, NULL,
266 ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
267 if (!BUF_MEM_grow(a->bytes, len))
268 goto memerr;
269 p = (unsigned char *)a->bytes->data;
270 ASN1_item_ex_i2d(&intname.a,
271 &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
272 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
273 local_sk_X509_NAME_ENTRY_free);
274 a->modified = 0;
275 return len;
276 memerr:
277 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
278 local_sk_X509_NAME_ENTRY_free);
279 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
280 return -1;
281}
282
283static int x509_name_ex_print(BIO *out, const ASN1_VALUE **pval,
284 int indent,
285 const char *fname, const ASN1_PCTX *pctx)
286{
287 if (X509_NAME_print_ex(out, (const X509_NAME *)*pval,
288 indent, pctx->nm_flags) <= 0)
289 return 0;
290 return 2;
291}
292
293/*
294 * This function generates the canonical encoding of the Name structure. In
295 * it all strings are converted to UTF8, leading, trailing and multiple
296 * spaces collapsed, converted to lower case and the leading SEQUENCE header
297 * removed. In future we could also normalize the UTF8 too. By doing this
298 * comparison of Name structures can be rapidly performed by just using
299 * memcmp() of the canonical encoding. By omitting the leading SEQUENCE name
300 * constraints of type dirName can also be checked with a simple memcmp().
301 * NOTE: For empty X509_NAME (NULL-DN), canon_enclen == 0 && canon_enc == NULL
302 */
303
304static int x509_name_canon(X509_NAME *a)
305{
306 unsigned char *p;
307 STACK_OF(STACK_OF_X509_NAME_ENTRY) *intname;
308 STACK_OF(X509_NAME_ENTRY) *entries = NULL;
309 X509_NAME_ENTRY *entry, *tmpentry = NULL;
310 int i, set = -1, ret = 0, len;
311
312 OPENSSL_free(a->canon_enc);
313 a->canon_enc = NULL;
314 /* Special case: empty X509_NAME => null encoding */
315 if (sk_X509_NAME_ENTRY_num(a->entries) == 0) {
316 a->canon_enclen = 0;
317 return 1;
318 }
319 intname = sk_STACK_OF_X509_NAME_ENTRY_new_null();
320 if (intname == NULL) {
321 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
322 goto err;
323 }
324 for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
325 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
326 if (entry->set != set) {
327 entries = sk_X509_NAME_ENTRY_new_null();
328 if (entries == NULL)
329 goto err;
330 if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname, entries)) {
331 sk_X509_NAME_ENTRY_free(entries);
332 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
333 goto err;
334 }
335 set = entry->set;
336 }
337 tmpentry = X509_NAME_ENTRY_new();
338 if (tmpentry == NULL) {
339 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
340 goto err;
341 }
342 tmpentry->object = OBJ_dup(entry->object);
343 if (tmpentry->object == NULL) {
344 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
345 goto err;
346 }
347 if (!asn1_string_canon(tmpentry->value, entry->value))
348 goto err;
349 if (!sk_X509_NAME_ENTRY_push(entries, tmpentry)) {
350 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
351 goto err;
352 }
353 tmpentry = NULL;
354 }
355
356 /* Finally generate encoding */
357 len = i2d_name_canon(intname, NULL);
358 if (len < 0)
359 goto err;
360 a->canon_enclen = len;
361
362 p = OPENSSL_malloc(a->canon_enclen);
363 if (p == NULL) {
364 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
365 goto err;
366 }
367
368 a->canon_enc = p;
369
370 i2d_name_canon(intname, &p);
371
372 ret = 1;
373
374 err:
375 X509_NAME_ENTRY_free(tmpentry);
376 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname,
377 local_sk_X509_NAME_ENTRY_pop_free);
378 return ret;
379}
380
381/* Bitmap of all the types of string that will be canonicalized. */
382
383#define ASN1_MASK_CANON \
384 (B_ASN1_UTF8STRING | B_ASN1_BMPSTRING | B_ASN1_UNIVERSALSTRING \
385 | B_ASN1_PRINTABLESTRING | B_ASN1_T61STRING | B_ASN1_IA5STRING \
386 | B_ASN1_VISIBLESTRING)
387
388static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in)
389{
390 unsigned char *to, *from;
391 int len, i;
392
393 /* If type not in bitmask just copy string across */
394 if (!(ASN1_tag2bit(in->type) & ASN1_MASK_CANON)) {
395 if (!ASN1_STRING_copy(out, in))
396 return 0;
397 return 1;
398 }
399
400 out->type = V_ASN1_UTF8STRING;
401 out->length = ASN1_STRING_to_UTF8(&out->data, in);
402 if (out->length == -1)
403 return 0;
404
405 to = out->data;
406 from = to;
407
408 len = out->length;
409
410 /*
411 * Convert string in place to canonical form. Ultimately we may need to
412 * handle a wider range of characters but for now ignore anything with
413 * MSB set and rely on the ossl_isspace() to fail on bad characters without
414 * needing isascii or range checks as well.
415 */
416
417 /* Ignore leading spaces */
418 while (len > 0 && ossl_isspace(*from)) {
419 from++;
420 len--;
421 }
422
423 to = from + len;
424
425 /* Ignore trailing spaces */
426 while (len > 0 && ossl_isspace(to[-1])) {
427 to--;
428 len--;
429 }
430
431 to = out->data;
432
433 i = 0;
434 while (i < len) {
435 /* If not ASCII set just copy across */
436 if (!ossl_isascii(*from)) {
437 *to++ = *from++;
438 i++;
439 }
440 /* Collapse multiple spaces */
441 else if (ossl_isspace(*from)) {
442 /* Copy one space across */
443 *to++ = ' ';
444 /*
445 * Ignore subsequent spaces. Note: don't need to check len here
446 * because we know the last character is a non-space so we can't
447 * overflow.
448 */
449 do {
450 from++;
451 i++;
452 }
453 while (ossl_isspace(*from));
454 } else {
455 *to++ = ossl_tolower(*from);
456 from++;
457 i++;
458 }
459 }
460
461 out->length = to - out->data;
462
463 return 1;
464
465}
466
467static int i2d_name_canon(const STACK_OF(STACK_OF_X509_NAME_ENTRY) * _intname,
468 unsigned char **in)
469{
470 int i, len, ltmp;
471 const ASN1_VALUE *v;
472 STACK_OF(ASN1_VALUE) *intname = (STACK_OF(ASN1_VALUE) *)_intname;
473
474 len = 0;
475 for (i = 0; i < sk_ASN1_VALUE_num(intname); i++) {
476 v = sk_ASN1_VALUE_value(intname, i);
477 ltmp = ASN1_item_ex_i2d(&v, in,
478 ASN1_ITEM_rptr(X509_NAME_ENTRIES), -1, -1);
479 if (ltmp < 0)
480 return ltmp;
481 len += ltmp;
482 }
483 return len;
484}
485
486int X509_NAME_set(X509_NAME **xn, const X509_NAME *name)
487{
488 X509_NAME *name_copy;
489
490 if (*xn == name)
491 return *xn != NULL;
492 if ((name_copy = X509_NAME_dup(name)) == NULL)
493 return 0;
494 X509_NAME_free(*xn);
495 *xn = name_copy;
496 return 1;
497}
498
499int X509_NAME_print(BIO *bp, const X509_NAME *name, int obase)
500{
501 char *s, *c, *b;
502 int i;
503
504 b = X509_NAME_oneline(name, NULL, 0);
505 if (b == NULL)
506 return 0;
507 if (*b == '\0') {
508 OPENSSL_free(b);
509 return 1;
510 }
511 s = b + 1; /* skip the first slash */
512
513 c = s;
514 for (;;) {
515 if (((*s == '/') &&
516 (ossl_isupper(s[1]) && ((s[2] == '=') ||
517 (ossl_isupper(s[2]) && (s[3] == '='))
518 ))) || (*s == '\0'))
519 {
520 i = s - c;
521 if (BIO_write(bp, c, i) != i)
522 goto err;
523 c = s + 1; /* skip following slash */
524 if (*s != '\0') {
525 if (BIO_write(bp, ", ", 2) != 2)
526 goto err;
527 }
528 }
529 if (*s == '\0')
530 break;
531 s++;
532 }
533
534 OPENSSL_free(b);
535 return 1;
536 err:
537 ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
538 OPENSSL_free(b);
539 return 0;
540}
541
542int X509_NAME_get0_der(const X509_NAME *nm, const unsigned char **pder,
543 size_t *pderlen)
544{
545 /* Make sure encoding is valid */
546 if (i2d_X509_NAME(nm, NULL) <= 0)
547 return 0;
548 if (pder != NULL)
549 *pder = (unsigned char *)nm->bytes->data;
550 if (pderlen != NULL)
551 *pderlen = nm->bytes->length;
552 return 1;
553}
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