2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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
12 #include "internal/cryptlib.h"
13 #include <openssl/asn1t.h>
14 #include <openssl/x509.h>
15 #include "internal/x509_int.h"
16 #include "internal/asn1_int.h"
20 * Maximum length of X509_NAME: much larger than anything we should
21 * ever see in practice.
24 #define X509_NAME_MAX (1024 * 1024)
26 static int x509_name_ex_d2i(ASN1_VALUE **val,
27 const unsigned char **in, long len,
29 int tag, int aclass, char opt, ASN1_TLC *ctx);
31 static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
32 const ASN1_ITEM *it, int tag, int aclass);
33 static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
34 static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
36 static int x509_name_encode(X509_NAME *a);
37 static int x509_name_canon(X509_NAME *a);
38 static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in);
39 static int i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) * intname,
42 static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
44 const char *fname, const ASN1_PCTX *pctx);
46 ASN1_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)
51 IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
52 IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
55 * For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY } so
56 * declare two template wrappers for this
59 ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
60 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
61 static_ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
63 ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
64 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
65 static_ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
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.
74 static const ASN1_EXTERN_FUNCS x509_name_ff = {
78 0, /* Default clear behaviour is OK */
84 IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
86 IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
88 IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
90 static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
92 X509_NAME *ret = OPENSSL_zalloc(sizeof(*ret));
96 if ((ret->entries = sk_X509_NAME_ENTRY_new_null()) == NULL)
98 if ((ret->bytes = BUF_MEM_new()) == NULL)
101 *val = (ASN1_VALUE *)ret;
105 ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
107 sk_X509_NAME_ENTRY_free(ret->entries);
113 static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
119 a = (X509_NAME *)*pval;
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);
128 static int x509_name_ex_d2i(ASN1_VALUE **val,
129 const unsigned char **in, long len,
130 const ASN1_ITEM *it, int tag, int aclass,
131 char opt, ASN1_TLC *ctx)
133 const unsigned char *p = *in, *q;
135 STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
147 STACK_OF(X509_NAME_ENTRY) *entries;
148 X509_NAME_ENTRY *entry;
149 if (len > X509_NAME_MAX)
153 /* Get internal representation of Name */
154 ret = ASN1_item_ex_d2i(&intname.a,
155 &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
156 tag, aclass, opt, ctx);
162 x509_name_ex_free(val, NULL);
163 if (!x509_name_ex_new(&nm.a, NULL))
165 /* We've decoded it: now cache encoding */
166 if (!BUF_MEM_grow(nm.x->bytes, p - q))
168 memcpy(nm.x->bytes->data, q, p - q);
170 /* Convert internal representation to X509_NAME structure */
171 for (i = 0; i < sk_STACK_OF_X509_NAME_ENTRY_num(intname.s); i++) {
172 entries = sk_STACK_OF_X509_NAME_ENTRY_value(intname.s, i);
173 for (j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
174 entry = sk_X509_NAME_ENTRY_value(entries, j);
176 if (!sk_X509_NAME_ENTRY_push(nm.x->entries, entry)) {
178 * Free all in entries if sk_X509_NAME_ENTRY_push return failure.
179 * X509_NAME_ENTRY_free will check the null entry.
181 sk_X509_NAME_ENTRY_pop_free(entries, X509_NAME_ENTRY_free);
185 * If sk_X509_NAME_ENTRY_push return success, clean the entries[j].
186 * It's necessary when 'goto err;' happens.
188 sk_X509_NAME_ENTRY_set(entries, j, NULL);
190 sk_X509_NAME_ENTRY_free(entries);
191 sk_STACK_OF_X509_NAME_ENTRY_set(intname.s, i, NULL);
194 sk_STACK_OF_X509_NAME_ENTRY_free(intname.s);
196 ret = x509_name_canon(nm.x);
205 X509_NAME_free(nm.x);
206 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s, sk_X509_NAME_ENTRY_free);
207 ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
211 static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
212 const ASN1_ITEM *it, int tag, int aclass)
215 X509_NAME *a = (X509_NAME *)*val;
217 ret = x509_name_encode(a);
220 ret = x509_name_canon(a);
224 ret = a->bytes->length;
226 memcpy(*out, a->bytes->data, ret);
232 static void local_sk_X509_NAME_ENTRY_free(STACK_OF(X509_NAME_ENTRY) *ne)
234 sk_X509_NAME_ENTRY_free(ne);
237 static void local_sk_X509_NAME_ENTRY_pop_free(STACK_OF(X509_NAME_ENTRY) *ne)
239 sk_X509_NAME_ENTRY_pop_free(ne, X509_NAME_ENTRY_free);
242 static int x509_name_encode(X509_NAME *a)
245 STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
252 STACK_OF(X509_NAME_ENTRY) *entries = NULL;
253 X509_NAME_ENTRY *entry;
255 intname.s = sk_STACK_OF_X509_NAME_ENTRY_new_null();
258 for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
259 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
260 if (entry->set != set) {
261 entries = sk_X509_NAME_ENTRY_new_null();
264 if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname.s, entries))
268 if (!sk_X509_NAME_ENTRY_push(entries, entry))
271 len = ASN1_item_ex_i2d(&intname.a, NULL,
272 ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
273 if (!BUF_MEM_grow(a->bytes, len))
275 p = (unsigned char *)a->bytes->data;
276 ASN1_item_ex_i2d(&intname.a,
277 &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
278 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
279 local_sk_X509_NAME_ENTRY_free);
283 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
284 local_sk_X509_NAME_ENTRY_free);
285 ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
289 static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
291 const char *fname, const ASN1_PCTX *pctx)
293 if (X509_NAME_print_ex(out, (X509_NAME *)*pval,
294 indent, pctx->nm_flags) <= 0)
300 * This function generates the canonical encoding of the Name structure. In
301 * it all strings are converted to UTF8, leading, trailing and multiple
302 * spaces collapsed, converted to lower case and the leading SEQUENCE header
303 * removed. In future we could also normalize the UTF8 too. By doing this
304 * comparison of Name structures can be rapidly performed by just using
305 * memcmp() of the canonical encoding. By omitting the leading SEQUENCE name
306 * constraints of type dirName can also be checked with a simple memcmp().
309 static int x509_name_canon(X509_NAME *a)
312 STACK_OF(STACK_OF_X509_NAME_ENTRY) *intname = NULL;
313 STACK_OF(X509_NAME_ENTRY) *entries = NULL;
314 X509_NAME_ENTRY *entry, *tmpentry = NULL;
315 int i, set = -1, ret = 0, len;
317 OPENSSL_free(a->canon_enc);
319 /* Special case: empty X509_NAME => null encoding */
320 if (sk_X509_NAME_ENTRY_num(a->entries) == 0) {
324 intname = sk_STACK_OF_X509_NAME_ENTRY_new_null();
327 for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
328 entry = sk_X509_NAME_ENTRY_value(a->entries, i);
329 if (entry->set != set) {
330 entries = sk_X509_NAME_ENTRY_new_null();
333 if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname, entries))
337 tmpentry = X509_NAME_ENTRY_new();
338 if (tmpentry == NULL)
340 tmpentry->object = OBJ_dup(entry->object);
341 if (tmpentry->object == NULL)
343 if (!asn1_string_canon(tmpentry->value, entry->value))
345 if (!sk_X509_NAME_ENTRY_push(entries, tmpentry))
350 /* Finally generate encoding */
352 len = i2d_name_canon(intname, NULL);
355 a->canon_enclen = len;
357 p = OPENSSL_malloc(a->canon_enclen);
364 i2d_name_canon(intname, &p);
370 X509_NAME_ENTRY_free(tmpentry);
371 sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname,
372 local_sk_X509_NAME_ENTRY_pop_free);
376 /* Bitmap of all the types of string that will be canonicalized. */
378 #define ASN1_MASK_CANON \
379 (B_ASN1_UTF8STRING | B_ASN1_BMPSTRING | B_ASN1_UNIVERSALSTRING \
380 | B_ASN1_PRINTABLESTRING | B_ASN1_T61STRING | B_ASN1_IA5STRING \
381 | B_ASN1_VISIBLESTRING)
383 static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in)
385 unsigned char *to, *from;
388 /* If type not in bitmask just copy string across */
389 if (!(ASN1_tag2bit(in->type) & ASN1_MASK_CANON)) {
390 if (!ASN1_STRING_copy(out, in))
395 out->type = V_ASN1_UTF8STRING;
396 out->length = ASN1_STRING_to_UTF8(&out->data, in);
397 if (out->length == -1)
406 * Convert string in place to canonical form. Ultimately we may need to
407 * handle a wider range of characters but for now ignore anything with
408 * MSB set and rely on the isspace() and tolower() functions.
411 /* Ignore leading spaces */
412 while ((len > 0) && !(*from & 0x80) && isspace(*from)) {
419 /* Ignore trailing spaces */
420 while ((len > 0) && !(to[-1] & 0x80) && isspace(to[-1])) {
429 /* If MSB set just copy across */
434 /* Collapse multiple spaces */
435 else if (isspace(*from)) {
436 /* Copy one space across */
439 * Ignore subsequent spaces. Note: don't need to check len here
440 * because we know the last character is a non-space so we can't
447 while (!(*from & 0x80) && isspace(*from));
449 *to++ = tolower(*from);
455 out->length = to - out->data;
461 static int i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) * _intname,
466 STACK_OF(ASN1_VALUE) *intname = (STACK_OF(ASN1_VALUE) *)_intname;
469 for (i = 0; i < sk_ASN1_VALUE_num(intname); i++) {
470 v = sk_ASN1_VALUE_value(intname, i);
471 ltmp = ASN1_item_ex_i2d(&v, in,
472 ASN1_ITEM_rptr(X509_NAME_ENTRIES), -1, -1);
480 int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
488 in = X509_NAME_dup(name);
494 return (*xn != NULL);
497 int X509_NAME_print(BIO *bp, X509_NAME *name, int obase)
504 b = X509_NAME_oneline(name, NULL, 0);
511 s = b + 1; /* skip the first slash */
515 #ifndef CHARSET_EBCDIC
517 ((s[1] >= 'A') && (s[1] <= 'Z') && ((s[2] == '=') ||
524 (isupper(s[1]) && ((s[2] == '=') ||
525 (isupper(s[2]) && (s[3] == '='))
530 if (BIO_write(bp, c, i) != i)
532 c = s + 1; /* skip following slash */
534 if (BIO_write(bp, ", ", 2) != 2)
548 X509err(X509_F_X509_NAME_PRINT, ERR_R_BUF_LIB);
553 int X509_NAME_get0_der(X509_NAME *nm, const unsigned char **pder,
556 /* Make sure encoding is valid */
557 if (i2d_X509_NAME(nm, NULL) <= 0)
560 *pder = (unsigned char *)nm->bytes->data;
562 *pderlen = nm->bytes->length;