2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
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
12 #include "crypto/ctype.h"
13 #include "internal/cryptlib.h"
14 #include <openssl/buffer.h>
15 #include <openssl/asn1.h>
16 #include <openssl/objects.h>
17 #include <openssl/bn.h>
18 #include "crypto/asn1.h"
19 #include "asn1_local.h"
21 int i2d_ASN1_OBJECT(const ASN1_OBJECT *a, unsigned char **pp)
23 unsigned char *p, *allocated = NULL;
26 if ((a == NULL) || (a->data == NULL))
29 objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT);
30 if (pp == NULL || objsize == -1)
34 if ((p = allocated = OPENSSL_malloc(objsize)) == NULL) {
35 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
42 ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
43 memcpy(p, a->data, a->length);
46 * If a new buffer was allocated, just return it back.
47 * If not, return the incremented buffer pointer.
49 *pp = allocated != NULL ? allocated : p + a->length;
53 int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
55 int i, first, len = 0, c, use_bn;
56 char ftmp[24], *tmp = ftmp;
57 int tmpsize = sizeof(ftmp);
70 if ((c >= '0') && (c <= '2')) {
73 ERR_raise(ERR_LIB_ASN1, ASN1_R_FIRST_NUM_TOO_LARGE);
78 ERR_raise(ERR_LIB_ASN1, ASN1_R_MISSING_SECOND_NUMBER);
86 if ((c != '.') && (c != ' ')) {
87 ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_SEPARATOR);
97 if ((c == ' ') || (c == '.'))
99 if (!ossl_isdigit(c)) {
100 ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_DIGIT);
103 if (!use_bn && l >= ((ULONG_MAX - 80) / 10L)) {
107 if (bl == NULL || !BN_set_word(bl, l))
111 if (!BN_mul_word(bl, 10L)
112 || !BN_add_word(bl, c - '0'))
115 l = l * 10L + (long)(c - '0');
118 if ((first < 2) && (l >= 40)) {
119 ERR_raise(ERR_LIB_ASN1, ASN1_R_SECOND_NUMBER_TOO_LARGE);
123 if (!BN_add_word(bl, first * 40))
126 l += (long)first *40;
131 blsize = BN_num_bits(bl);
132 blsize = (blsize + 6) / 7;
133 if (blsize > tmpsize) {
136 tmpsize = blsize + 32;
137 tmp = OPENSSL_malloc(tmpsize);
142 BN_ULONG t = BN_div_word(bl, 0x80L);
143 if (t == (BN_ULONG)-1)
145 tmp[i++] = (unsigned char)t;
150 tmp[i++] = (unsigned char)l & 0x7f;
158 if (len + i > olen) {
159 ERR_raise(ERR_LIB_ASN1, ASN1_R_BUFFER_TOO_SMALL);
163 out[len++] = tmp[i] | 0x80;
179 int i2t_ASN1_OBJECT(char *buf, int buf_len, const ASN1_OBJECT *a)
181 return OBJ_obj2txt(buf, buf_len, a, 0);
184 int i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *a)
186 char buf[80], *p = buf;
189 if ((a == NULL) || (a->data == NULL))
190 return BIO_write(bp, "NULL", 4);
191 i = i2t_ASN1_OBJECT(buf, sizeof(buf), a);
192 if (i > (int)(sizeof(buf) - 1)) {
193 if ((p = OPENSSL_malloc(i + 1)) == NULL) {
194 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
197 i2t_ASN1_OBJECT(p, i + 1, a);
200 i = BIO_write(bp, "<INVALID>", 9);
201 i += BIO_dump(bp, (const char *)a->data, a->length);
210 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
213 const unsigned char *p;
217 ASN1_OBJECT *ret = NULL;
219 inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
221 i = ASN1_R_BAD_OBJECT_HEADER;
225 if (tag != V_ASN1_OBJECT) {
226 i = ASN1_R_EXPECTING_AN_OBJECT;
229 ret = ossl_c2i_ASN1_OBJECT(a, &p, len);
234 ERR_raise(ERR_LIB_ASN1, i);
238 ASN1_OBJECT *ossl_c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
241 ASN1_OBJECT *ret = NULL, tobj;
242 const unsigned char *p;
247 * Sanity check OID encoding. Need at least one content octet. MSB must
248 * be clear in the last octet. can't have leading 0x80 in subidentifiers,
251 if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL ||
253 ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_OBJECT_ENCODING);
256 /* Now 0 < len <= INT_MAX, so the cast is safe. */
259 * Try to lookup OID in table: these are all valid encodings so if we get
260 * a match we know the OID is valid.
262 tobj.nid = NID_undef;
264 tobj.length = length;
266 i = OBJ_obj2nid(&tobj);
267 if (i != NID_undef) {
269 * Return shared registered OID object: this improves efficiency
270 * because we don't have to return a dynamically allocated OID
271 * and NID lookups can use the cached value.
273 ret = OBJ_nid2obj(i);
275 ASN1_OBJECT_free(*a);
281 for (i = 0; i < length; i++, p++) {
282 if (*p == 0x80 && (!i || !(p[-1] & 0x80))) {
283 ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_OBJECT_ENCODING);
289 * only the ASN1_OBJECTs from the 'table' will have values for ->sn or
292 if ((a == NULL) || ((*a) == NULL) ||
293 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) {
294 if ((ret = ASN1_OBJECT_new()) == NULL)
300 /* detach data from object */
301 data = (unsigned char *)ret->data;
303 /* once detached we can change it */
304 if ((data == NULL) || (ret->length < length)) {
307 data = OPENSSL_malloc(length);
309 i = ERR_R_MALLOC_FAILURE;
312 ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
314 memcpy(data, p, length);
315 /* reattach data to object, after which it remains const */
317 ret->length = length;
320 /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
328 ERR_raise(ERR_LIB_ASN1, i);
329 if ((a == NULL) || (*a != ret))
330 ASN1_OBJECT_free(ret);
334 ASN1_OBJECT *ASN1_OBJECT_new(void)
338 ret = OPENSSL_zalloc(sizeof(*ret));
340 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
343 ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;
347 void ASN1_OBJECT_free(ASN1_OBJECT *a)
351 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
352 #ifndef CONST_STRICT /* disable purely for compile-time strict
353 * const checking. Doing this on a "real"
354 * compile will cause memory leaks */
355 OPENSSL_free((void*)a->sn);
356 OPENSSL_free((void*)a->ln);
358 a->sn = a->ln = NULL;
360 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
361 OPENSSL_free((void*)a->data);
365 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
369 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
370 const char *sn, const char *ln)
379 o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
380 ASN1_OBJECT_FLAG_DYNAMIC_DATA;