2 * Copyright 1995-2018 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/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 "internal/asn1_int.h"
19 #include "asn1_locl.h"
21 int i2d_ASN1_OBJECT(const ASN1_OBJECT *a, unsigned char **pp)
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 ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
35 memcpy(p, a->data, a->length);
42 int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
44 int i, first, len = 0, c, use_bn;
45 char ftmp[24], *tmp = ftmp;
46 int tmpsize = sizeof(ftmp);
59 if ((c >= '0') && (c <= '2')) {
62 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_FIRST_NUM_TOO_LARGE);
67 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_MISSING_SECOND_NUMBER);
75 if ((c != '.') && (c != ' ')) {
76 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_INVALID_SEPARATOR);
86 if ((c == ' ') || (c == '.'))
88 if (!ossl_isdigit(c)) {
89 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_INVALID_DIGIT);
92 if (!use_bn && l >= ((ULONG_MAX - 80) / 10L)) {
96 if (bl == NULL || !BN_set_word(bl, l))
100 if (!BN_mul_word(bl, 10L)
101 || !BN_add_word(bl, c - '0'))
104 l = l * 10L + (long)(c - '0');
107 if ((first < 2) && (l >= 40)) {
108 ASN1err(ASN1_F_A2D_ASN1_OBJECT,
109 ASN1_R_SECOND_NUMBER_TOO_LARGE);
113 if (!BN_add_word(bl, first * 40))
116 l += (long)first *40;
121 blsize = BN_num_bits(bl);
122 blsize = (blsize + 6) / 7;
123 if (blsize > tmpsize) {
126 tmpsize = blsize + 32;
127 tmp = OPENSSL_malloc(tmpsize);
132 BN_ULONG t = BN_div_word(bl, 0x80L);
133 if (t == (BN_ULONG)-1)
135 tmp[i++] = (unsigned char)t;
140 tmp[i++] = (unsigned char)l & 0x7f;
148 if (len + i > olen) {
149 ASN1err(ASN1_F_A2D_ASN1_OBJECT, ASN1_R_BUFFER_TOO_SMALL);
153 out[len++] = tmp[i] | 0x80;
169 int i2t_ASN1_OBJECT(char *buf, int buf_len, const ASN1_OBJECT *a)
171 return OBJ_obj2txt(buf, buf_len, a, 0);
174 int i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *a)
176 char buf[80], *p = buf;
179 if ((a == NULL) || (a->data == NULL))
180 return BIO_write(bp, "NULL", 4);
181 i = i2t_ASN1_OBJECT(buf, sizeof(buf), a);
182 if (i > (int)(sizeof(buf) - 1)) {
183 if ((p = OPENSSL_malloc(i + 1)) == NULL) {
184 ASN1err(ASN1_F_I2A_ASN1_OBJECT, ERR_R_MALLOC_FAILURE);
187 i2t_ASN1_OBJECT(p, i + 1, a);
190 i = BIO_write(bp, "<INVALID>", 9);
191 i += BIO_dump(bp, (const char *)a->data, a->length);
200 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
203 const unsigned char *p;
207 ASN1_OBJECT *ret = NULL;
209 inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
211 i = ASN1_R_BAD_OBJECT_HEADER;
215 if (tag != V_ASN1_OBJECT) {
216 i = ASN1_R_EXPECTING_AN_OBJECT;
219 ret = c2i_ASN1_OBJECT(a, &p, len);
224 ASN1err(ASN1_F_D2I_ASN1_OBJECT, i);
228 ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
231 ASN1_OBJECT *ret = NULL, tobj;
232 const unsigned char *p;
237 * Sanity check OID encoding. Need at least one content octet. MSB must
238 * be clear in the last octet. can't have leading 0x80 in subidentifiers,
241 if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL ||
243 ASN1err(ASN1_F_C2I_ASN1_OBJECT, ASN1_R_INVALID_OBJECT_ENCODING);
246 /* Now 0 < len <= INT_MAX, so the cast is safe. */
249 * Try to lookup OID in table: these are all valid encodings so if we get
250 * a match we know the OID is valid.
252 tobj.nid = NID_undef;
254 tobj.length = length;
256 i = OBJ_obj2nid(&tobj);
257 if (i != NID_undef) {
259 * Return shared registered OID object: this improves efficiency
260 * because we don't have to return a dynamically allocated OID
261 * and NID lookups can use the cached value.
263 ret = OBJ_nid2obj(i);
265 ASN1_OBJECT_free(*a);
271 for (i = 0; i < length; i++, p++) {
272 if (*p == 0x80 && (!i || !(p[-1] & 0x80))) {
273 ASN1err(ASN1_F_C2I_ASN1_OBJECT, ASN1_R_INVALID_OBJECT_ENCODING);
279 * only the ASN1_OBJECTs from the 'table' will have values for ->sn or
282 if ((a == NULL) || ((*a) == NULL) ||
283 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) {
284 if ((ret = ASN1_OBJECT_new()) == NULL)
290 /* detach data from object */
291 data = (unsigned char *)ret->data;
293 /* once detached we can change it */
294 if ((data == NULL) || (ret->length < length)) {
297 data = OPENSSL_malloc(length);
299 i = ERR_R_MALLOC_FAILURE;
302 ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
304 memcpy(data, p, length);
305 /* reattach data to object, after which it remains const */
307 ret->length = length;
310 /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
318 ASN1err(ASN1_F_C2I_ASN1_OBJECT, i);
319 if ((a == NULL) || (*a != ret))
320 ASN1_OBJECT_free(ret);
324 ASN1_OBJECT *ASN1_OBJECT_new(void)
328 ret = OPENSSL_zalloc(sizeof(*ret));
330 ASN1err(ASN1_F_ASN1_OBJECT_NEW, ERR_R_MALLOC_FAILURE);
333 ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;
337 void ASN1_OBJECT_free(ASN1_OBJECT *a)
341 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
342 #ifndef CONST_STRICT /* disable purely for compile-time strict
343 * const checking. Doing this on a "real"
344 * compile will cause memory leaks */
345 OPENSSL_free((void*)a->sn);
346 OPENSSL_free((void*)a->ln);
348 a->sn = a->ln = NULL;
350 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
351 OPENSSL_free((void*)a->data);
355 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
359 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
360 const char *sn, const char *ln)
369 o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
370 ASN1_OBJECT_FLAG_DYNAMIC_DATA;