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openssl/crypto/objects/obj_dat.c

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/*
* Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "crypto/ctype.h"
#include <limits.h>
#include "internal/cryptlib.h"
#include "internal/thread_once.h"
#include "internal/tsan_assist.h"
#include <openssl/lhash.h>
#include <openssl/asn1.h>
#include "crypto/objects.h"
#include <openssl/bn.h>
#include "crypto/asn1.h"
#include "obj_local.h"
/* obj_dat.h is generated from objects.txt and obj_mac.{num,h} by obj_dat.pl */
#include "obj_dat.h"
DECLARE_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, sn);
DECLARE_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, ln);
DECLARE_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, obj);
#define ADDED_DATA 0
#define ADDED_SNAME 1
#define ADDED_LNAME 2
#define ADDED_NID 3
struct added_obj_st {
int type;
ASN1_OBJECT *obj;
};
static LHASH_OF(ADDED_OBJ) *added = NULL;
static CRYPTO_RWLOCK *ossl_obj_lock = NULL;
#ifdef TSAN_REQUIRES_LOCKING
static CRYPTO_RWLOCK *ossl_obj_nid_lock = NULL;
#endif
static CRYPTO_ONCE ossl_obj_lock_init = CRYPTO_ONCE_STATIC_INIT;
static ossl_inline void objs_free_locks(void)
{
CRYPTO_THREAD_lock_free(ossl_obj_lock);
ossl_obj_lock = NULL;
#ifdef TSAN_REQUIRES_LOCKING
CRYPTO_THREAD_lock_free(ossl_obj_nid_lock);
ossl_obj_nid_lock = NULL;
#endif
}
DEFINE_RUN_ONCE_STATIC(obj_lock_initialise)
{
ossl_obj_lock = CRYPTO_THREAD_lock_new();
if (ossl_obj_lock == NULL)
return 0;
#ifdef TSAN_REQUIRES_LOCKING
ossl_obj_nid_lock = CRYPTO_THREAD_lock_new();
if (ossl_obj_nid_lock == NULL) {
objs_free_locks();
return 0;
}
#endif
return 1;
}
static ossl_inline int ossl_init_added_lock(void)
{
#ifndef OPENSSL_NO_AUTOLOAD_CONFIG
/* Make sure we've loaded config before checking for any "added" objects */
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
#endif
return RUN_ONCE(&ossl_obj_lock_init, obj_lock_initialise);
}
static ossl_inline int ossl_obj_write_lock(int lock)
{
if (!lock)
return 1;
if (!ossl_init_added_lock())
return 0;
return CRYPTO_THREAD_write_lock(ossl_obj_lock);
}
static ossl_inline int ossl_obj_read_lock(int lock)
{
if (!lock)
return 1;
if (!ossl_init_added_lock())
return 0;
return CRYPTO_THREAD_read_lock(ossl_obj_lock);
}
static ossl_inline void ossl_obj_unlock(int lock)
{
if (lock)
CRYPTO_THREAD_unlock(ossl_obj_lock);
}
static int sn_cmp(const ASN1_OBJECT *const *a, const unsigned int *b)
{
return strcmp((*a)->sn, nid_objs[*b].sn);
}
IMPLEMENT_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, sn);
static int ln_cmp(const ASN1_OBJECT *const *a, const unsigned int *b)
{
return strcmp((*a)->ln, nid_objs[*b].ln);
}
IMPLEMENT_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, ln);
static unsigned long added_obj_hash(const ADDED_OBJ *ca)
{
const ASN1_OBJECT *a;
int i;
unsigned long ret = 0;
unsigned char *p;
a = ca->obj;
switch (ca->type) {
case ADDED_DATA:
ret = (unsigned long)a->length << 20UL;
p = (unsigned char *)a->data;
for (i = 0; i < a->length; i++)
ret ^= p[i] << ((i * 3) % 24);
break;
case ADDED_SNAME:
ret = OPENSSL_LH_strhash(a->sn);
break;
case ADDED_LNAME:
ret = OPENSSL_LH_strhash(a->ln);
break;
case ADDED_NID:
ret = a->nid;
break;
default:
/* abort(); */
return 0;
}
ret &= 0x3fffffffL;
ret |= ((unsigned long)ca->type) << 30L;
return ret;
}
static int added_obj_cmp(const ADDED_OBJ *ca, const ADDED_OBJ *cb)
{
ASN1_OBJECT *a, *b;
int i;
i = ca->type - cb->type;
if (i)
return i;
a = ca->obj;
b = cb->obj;
switch (ca->type) {
case ADDED_DATA:
i = (a->length - b->length);
if (i)
return i;
return memcmp(a->data, b->data, (size_t)a->length);
case ADDED_SNAME:
if (a->sn == NULL)
return -1;
else if (b->sn == NULL)
return 1;
else
return strcmp(a->sn, b->sn);
case ADDED_LNAME:
if (a->ln == NULL)
return -1;
else if (b->ln == NULL)
return 1;
else
return strcmp(a->ln, b->ln);
case ADDED_NID:
return a->nid - b->nid;
default:
/* abort(); */
return 0;
}
}
static void cleanup1_doall(ADDED_OBJ *a)
{
a->obj->nid = 0;
a->obj->flags |= ASN1_OBJECT_FLAG_DYNAMIC |
ASN1_OBJECT_FLAG_DYNAMIC_STRINGS | ASN1_OBJECT_FLAG_DYNAMIC_DATA;
}
static void cleanup2_doall(ADDED_OBJ *a)
{
a->obj->nid++;
}
static void cleanup3_doall(ADDED_OBJ *a)
{
if (--a->obj->nid == 0)
ASN1_OBJECT_free(a->obj);
OPENSSL_free(a);
}
void ossl_obj_cleanup_int(void)
{
if (added != NULL) {
lh_ADDED_OBJ_set_down_load(added, 0);
lh_ADDED_OBJ_doall(added, cleanup1_doall); /* zero counters */
lh_ADDED_OBJ_doall(added, cleanup2_doall); /* set counters */
lh_ADDED_OBJ_doall(added, cleanup3_doall); /* free objects */
lh_ADDED_OBJ_free(added);
added = NULL;
}
objs_free_locks();
}
/*
* Requires that the ossl_obj_lock be held
* if TSAN_REQUIRES_LOCKING defined
*/
static int obj_new_nid_unlocked(int num)
{
static TSAN_QUALIFIER int new_nid = NUM_NID;
#ifdef TSAN_REQUIRES_LOCKING
int i;
i = new_nid;
new_nid += num;
return i;
#else
return tsan_add(&new_nid, num);
#endif
}
int OBJ_new_nid(int num)
{
#ifdef TSAN_REQUIRES_LOCKING
int i;
if (!ossl_obj_write_lock(1)) {
ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
return NID_undef;
}
i = obj_new_nid_unlocked(num);
ossl_obj_unlock(1);
return i;
#else
return obj_new_nid_unlocked(num);
#endif
}
static int ossl_obj_add_object(const ASN1_OBJECT *obj, int lock)
{
ASN1_OBJECT *o = NULL;
ADDED_OBJ *ao[4] = { NULL, NULL, NULL, NULL }, *aop[4];
int i;
if ((o = OBJ_dup(obj)) == NULL)
return NID_undef;
if ((ao[ADDED_NID] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL
|| (o->length != 0
&& obj->data != NULL
&& (ao[ADDED_DATA] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
|| (o->sn != NULL
&& (ao[ADDED_SNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
|| (o->ln != NULL
&& (ao[ADDED_LNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL))
goto err2;
if (!ossl_obj_write_lock(lock)) {
ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
goto err2;
}
if (added == NULL) {
added = lh_ADDED_OBJ_new(added_obj_hash, added_obj_cmp);
if (added == NULL) {
ERR_raise(ERR_LIB_OBJ, ERR_R_CRYPTO_LIB);
goto err;
}
}
for (i = ADDED_DATA; i <= ADDED_NID; i++) {
if (ao[i] != NULL) {
ao[i]->type = i;
ao[i]->obj = o;
aop[i] = lh_ADDED_OBJ_retrieve(added, ao[i]);
if (aop[i] != NULL)
aop[i]->type = -1;
(void)lh_ADDED_OBJ_insert(added, ao[i]);
if (lh_ADDED_OBJ_error(added)) {
if (aop[i] != NULL)
aop[i]->type = i;
while (i-- > ADDED_DATA) {
lh_ADDED_OBJ_delete(added, ao[i]);
if (aop[i] != NULL)
aop[i]->type = i;
}
ERR_raise(ERR_LIB_OBJ, ERR_R_CRYPTO_LIB);
goto err;
}
}
}
o->flags &=
~(ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
ASN1_OBJECT_FLAG_DYNAMIC_DATA);
ossl_obj_unlock(lock);
return o->nid;
err:
ossl_obj_unlock(lock);
err2:
for (i = ADDED_DATA; i <= ADDED_NID; i++)
OPENSSL_free(ao[i]);
ASN1_OBJECT_free(o);
return NID_undef;
}
ASN1_OBJECT *OBJ_nid2obj(int n)
{
ADDED_OBJ ad, *adp = NULL;
ASN1_OBJECT ob;
if (n == NID_undef
|| (n > 0 && n < NUM_NID && nid_objs[n].nid != NID_undef))
return (ASN1_OBJECT *)&(nid_objs[n]);
ad.type = ADDED_NID;
ad.obj = &ob;
ob.nid = n;
if (!ossl_obj_read_lock(1)) {
ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
return NULL;
}
if (added != NULL)
adp = lh_ADDED_OBJ_retrieve(added, &ad);
ossl_obj_unlock(1);
if (adp != NULL)
return adp->obj;
ERR_raise(ERR_LIB_OBJ, OBJ_R_UNKNOWN_NID);
return NULL;
}
const char *OBJ_nid2sn(int n)
{
ASN1_OBJECT *ob = OBJ_nid2obj(n);
return ob == NULL ? NULL : ob->sn;
}
const char *OBJ_nid2ln(int n)
{
ASN1_OBJECT *ob = OBJ_nid2obj(n);
return ob == NULL ? NULL : ob->ln;
}
static int obj_cmp(const ASN1_OBJECT *const *ap, const unsigned int *bp)
{
int j;
const ASN1_OBJECT *a = *ap;
const ASN1_OBJECT *b = &nid_objs[*bp];
j = (a->length - b->length);
if (j)
return j;
if (a->length == 0)
return 0;
return memcmp(a->data, b->data, a->length);
}
IMPLEMENT_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, obj);
static int ossl_obj_obj2nid(const ASN1_OBJECT *a, const int lock)
{
int nid = NID_undef;
const unsigned int *op;
ADDED_OBJ ad, *adp;
if (a == NULL)
return NID_undef;
if (a->nid != NID_undef)
return a->nid;
if (a->length == 0)
return NID_undef;
op = OBJ_bsearch_obj(&a, obj_objs, NUM_OBJ);
if (op != NULL)
return nid_objs[*op].nid;
if (!ossl_obj_read_lock(lock)) {
ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
return NID_undef;
}
if (added != NULL) {
ad.type = ADDED_DATA;
ad.obj = (ASN1_OBJECT *)a; /* casting away const is harmless here */
adp = lh_ADDED_OBJ_retrieve(added, &ad);
if (adp != NULL)
nid = adp->obj->nid;
}
ossl_obj_unlock(lock);
return nid;
}
/*
* Convert an object name into an ASN1_OBJECT if "noname" is not set then
* search for short and long names first. This will convert the "dotted" form
* into an object: unlike OBJ_txt2nid it can be used with any objects, not
* just registered ones.
*/
ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
{
int nid = NID_undef;
ASN1_OBJECT *op = NULL;
unsigned char *buf;
unsigned char *p;
const unsigned char *cp;
int i, j;
if (!no_name) {
if ((nid = OBJ_sn2nid(s)) != NID_undef
|| (nid = OBJ_ln2nid(s)) != NID_undef) {
return OBJ_nid2obj(nid);
}
if (!ossl_isdigit(*s)) {
ERR_raise(ERR_LIB_OBJ, OBJ_R_UNKNOWN_OBJECT_NAME);
return NULL;
}
}
/* Work out size of content octets */
i = a2d_ASN1_OBJECT(NULL, 0, s, -1);
if (i <= 0)
return NULL;
/* Work out total size */
j = ASN1_object_size(0, i, V_ASN1_OBJECT);
if (j < 0)
return NULL;
if ((buf = OPENSSL_malloc(j)) == NULL)
return NULL;
p = buf;
/* Write out tag+length */
ASN1_put_object(&p, 0, i, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
/* Write out contents */
a2d_ASN1_OBJECT(p, i, s, -1);
cp = buf;
op = d2i_ASN1_OBJECT(NULL, &cp, j);
OPENSSL_free(buf);
return op;
}
int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
{
int i, n = 0, len, nid, first, use_bn;
BIGNUM *bl;
unsigned long l;
const unsigned char *p;
char tbuf[DECIMAL_SIZE(i) + DECIMAL_SIZE(l) + 2];
const char *s;
/* Ensure that, at every state, |buf| is NUL-terminated. */
if (buf != NULL && buf_len > 0)
buf[0] = '\0';
if (a == NULL || a->data == NULL)
return 0;
if (!no_name && (nid = OBJ_obj2nid(a)) != NID_undef) {
s = OBJ_nid2ln(nid);
if (s == NULL)
s = OBJ_nid2sn(nid);
if (s != NULL) {
if (buf != NULL)
OPENSSL_strlcpy(buf, s, buf_len);
return (int)strlen(s);
}
}
len = a->length;
p = a->data;
first = 1;
bl = NULL;
/*
* RFC 2578 (STD 58) says this about OBJECT IDENTIFIERs:
*
* > 3.5. OBJECT IDENTIFIER values
* >
* > An OBJECT IDENTIFIER value is an ordered list of non-negative
* > numbers. For the SMIv2, each number in the list is referred to as a
* > sub-identifier, there are at most 128 sub-identifiers in a value,
* > and each sub-identifier has a maximum value of 2^32-1 (4294967295
* > decimal).
*
* So a legitimate OID according to this RFC is at most (32 * 128 / 7),
* i.e. 586 bytes long.
*
* Ref: https://datatracker.ietf.org/doc/html/rfc2578#section-3.5
*/
if (len > 586)
goto err;
while (len > 0) {
l = 0;
use_bn = 0;
for (;;) {
unsigned char c = *p++;
len--;
if (len == 0 && (c & 0x80) != 0)
goto err;
if (use_bn) {
if (!BN_add_word(bl, c & 0x7f))
goto err;
} else {
l |= c & 0x7f;
}
if ((c & 0x80) == 0)
break;
if (!use_bn && l > (ULONG_MAX >> 7L)) {
if (bl == NULL && (bl = BN_new()) == NULL)
goto err;
if (!BN_set_word(bl, l))
goto err;
use_bn = 1;
}
if (use_bn) {
if (!BN_lshift(bl, bl, 7))
goto err;
} else {
l <<= 7L;
}
}
if (first) {
first = 0;
if (l >= 80) {
i = 2;
if (use_bn) {
if (!BN_sub_word(bl, 80))
goto err;
} else {
l -= 80;
}
} else {
i = (int)(l / 40);
l -= (long)(i * 40);
}
if (buf != NULL && buf_len > 1) {
*buf++ = i + '0';
*buf = '\0';
buf_len--;
}
n++;
}
if (use_bn) {
char *bndec;
bndec = BN_bn2dec(bl);
if (!bndec)
goto err;
i = strlen(bndec);
if (buf != NULL) {
if (buf_len > 1) {
*buf++ = '.';
*buf = '\0';
buf_len--;
}
OPENSSL_strlcpy(buf, bndec, buf_len);
if (i > buf_len) {
buf += buf_len;
buf_len = 0;
} else {
buf += i;
buf_len -= i;
}
}
n++;
n += i;
OPENSSL_free(bndec);
} else {
BIO_snprintf(tbuf, sizeof(tbuf), ".%lu", l);
i = strlen(tbuf);
if (buf && buf_len > 0) {
OPENSSL_strlcpy(buf, tbuf, buf_len);
if (i > buf_len) {
buf += buf_len;
buf_len = 0;
} else {
buf += i;
buf_len -= i;
}
}
n += i;
l = 0;
}
}
BN_free(bl);
return n;
err:
BN_free(bl);
return -1;
}
int OBJ_txt2nid(const char *s)
{
ASN1_OBJECT *obj = OBJ_txt2obj(s, 0);
int nid = NID_undef;
if (obj != NULL) {
nid = OBJ_obj2nid(obj);
ASN1_OBJECT_free(obj);
}
return nid;
}
int OBJ_ln2nid(const char *s)
{
ASN1_OBJECT o;
const ASN1_OBJECT *oo = &o;
ADDED_OBJ ad, *adp;
const unsigned int *op;
int nid = NID_undef;
o.ln = s;
op = OBJ_bsearch_ln(&oo, ln_objs, NUM_LN);
if (op != NULL)
return nid_objs[*op].nid;
if (!ossl_obj_read_lock(1)) {
ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
return NID_undef;
}
if (added != NULL) {
ad.type = ADDED_LNAME;
ad.obj = &o;
adp = lh_ADDED_OBJ_retrieve(added, &ad);
if (adp != NULL)
nid = adp->obj->nid;
}
ossl_obj_unlock(1);
return nid;
}
int OBJ_sn2nid(const char *s)
{
ASN1_OBJECT o;
const ASN1_OBJECT *oo = &o;
ADDED_OBJ ad, *adp;
const unsigned int *op;
int nid = NID_undef;
o.sn = s;
op = OBJ_bsearch_sn(&oo, sn_objs, NUM_SN);
if (op != NULL)
return nid_objs[*op].nid;
if (!ossl_obj_read_lock(1)) {
ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
return NID_undef;
}
if (added != NULL) {
ad.type = ADDED_SNAME;
ad.obj = &o;
adp = lh_ADDED_OBJ_retrieve(added, &ad);
if (adp != NULL)
nid = adp->obj->nid;
}
ossl_obj_unlock(1);
return nid;
}
const void *OBJ_bsearch_(const void *key, const void *base, int num, int size,
int (*cmp) (const void *, const void *))
{
return OBJ_bsearch_ex_(key, base, num, size, cmp, 0);
}
const void *OBJ_bsearch_ex_(const void *key, const void *base, int num,
int size,
int (*cmp) (const void *, const void *),
int flags)
{
const char *p = ossl_bsearch(key, base, num, size, cmp, flags);
#ifdef CHARSET_EBCDIC
/*
* THIS IS A KLUDGE - Because the *_obj is sorted in ASCII order, and I
* don't have perl (yet), we revert to a *LINEAR* search when the object
* wasn't found in the binary search.
*/
if (p == NULL) {
const char *base_ = base;
int l, h, i = 0, c = 0;
char *p1;
for (i = 0; i < num; ++i) {
p1 = &(base_[i * size]);
c = (*cmp) (key, p1);
if (c == 0
|| (c < 0 && (flags & OBJ_BSEARCH_VALUE_ON_NOMATCH)))
return p1;
}
}
#endif
return p;
}
/*
* Parse a BIO sink to create some extra oid's objects.
* Line format:<OID:isdigit or '.']><isspace><SN><isspace><LN>
*/
int OBJ_create_objects(BIO *in)
{
char buf[512];
int i, num = 0;
char *o, *s, *l = NULL;
for (;;) {
s = o = NULL;
i = BIO_gets(in, buf, 512);
if (i <= 0)
return num;
buf[i - 1] = '\0';
if (!ossl_isalnum(buf[0]))
return num;
o = s = buf;
while (ossl_isdigit(*s) || *s == '.')
s++;
if (*s != '\0') {
*(s++) = '\0';
while (ossl_isspace(*s))
s++;
if (*s == '\0') {
s = NULL;
} else {
l = s;
while (*l != '\0' && !ossl_isspace(*l))
l++;
if (*l != '\0') {
*(l++) = '\0';
while (ossl_isspace(*l))
l++;
if (*l == '\0') {
l = NULL;
}
} else {
l = NULL;
}
}
} else {
s = NULL;
}
if (*o == '\0')
return num;
if (!OBJ_create(o, s, l))
return num;
num++;
}
}
int OBJ_create(const char *oid, const char *sn, const char *ln)
{
ASN1_OBJECT *tmpoid = NULL;
int ok = 0;
/* With no arguments at all, nothing can be done */
if (oid == NULL && sn == NULL && ln == NULL) {
ERR_raise(ERR_LIB_OBJ, ERR_R_PASSED_INVALID_ARGUMENT);
return 0;
}
/* Check to see if short or long name already present */
if ((sn != NULL && OBJ_sn2nid(sn) != NID_undef)
|| (ln != NULL && OBJ_ln2nid(ln) != NID_undef)) {
ERR_raise(ERR_LIB_OBJ, OBJ_R_OID_EXISTS);
return 0;
}
if (oid != NULL) {
/* Convert numerical OID string to an ASN1_OBJECT structure */
tmpoid = OBJ_txt2obj(oid, 1);
if (tmpoid == NULL)
return 0;
} else {
/* Create a no-OID ASN1_OBJECT */
tmpoid = ASN1_OBJECT_new();
if (tmpoid == NULL) {
ERR_raise(ERR_LIB_OBJ, ERR_R_ASN1_LIB);
return 0;
}
}
if (!ossl_obj_write_lock(1)) {
ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
ASN1_OBJECT_free(tmpoid);
return 0;
}
/* If NID is not NID_undef then object already exists */
if (oid != NULL
&& ossl_obj_obj2nid(tmpoid, 0) != NID_undef) {
ERR_raise(ERR_LIB_OBJ, OBJ_R_OID_EXISTS);
goto err;
}
tmpoid->nid = obj_new_nid_unlocked(1);
if (tmpoid->nid == NID_undef)
goto err;
tmpoid->sn = (char *)sn;
tmpoid->ln = (char *)ln;
ok = ossl_obj_add_object(tmpoid, 0);
tmpoid->sn = NULL;
tmpoid->ln = NULL;
err:
ossl_obj_unlock(1);
ASN1_OBJECT_free(tmpoid);
return ok;
}
size_t OBJ_length(const ASN1_OBJECT *obj)
{
if (obj == NULL)
return 0;
return obj->length;
}
const unsigned char *OBJ_get0_data(const ASN1_OBJECT *obj)
{
if (obj == NULL)
return NULL;
return obj->data;
}
int OBJ_add_object(const ASN1_OBJECT *obj)
{
return ossl_obj_add_object(obj, 1);
}
int OBJ_obj2nid(const ASN1_OBJECT *a)
{
return ossl_obj_obj2nid(a, 1);
}
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