/* $OpenBSD: obj_dat.c,v 1.49 2022/03/19 17:49:32 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>

#include <openssl/opensslconf.h>

#include <openssl/asn1.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/objects.h>

#include "asn1_locl.h"

/* obj_dat.h is generated from objects.h by obj_dat.pl */
#include "obj_dat.h"

static int sn_cmp_BSEARCH_CMP_FN(const void *, const void *);
static int sn_cmp(const ASN1_OBJECT * const *, unsigned int const *);
static unsigned int *OBJ_bsearch_sn(const ASN1_OBJECT * *key, unsigned int const *base, int num);
static int ln_cmp_BSEARCH_CMP_FN(const void *, const void *);
static int ln_cmp(const ASN1_OBJECT * const *, unsigned int const *);
static unsigned int *OBJ_bsearch_ln(const ASN1_OBJECT * *key, unsigned int const *base, int num);
static int obj_cmp_BSEARCH_CMP_FN(const void *, const void *);
static int obj_cmp(const ASN1_OBJECT * const *, unsigned int const *);
static unsigned int *OBJ_bsearch_obj(const ASN1_OBJECT * *key, unsigned int const *base, int num);

#define ADDED_DATA      0
#define ADDED_SNAME     1
#define ADDED_LNAME     2
#define ADDED_NID       3

typedef struct added_obj_st {
        int type;
        ASN1_OBJECT *obj;
} ADDED_OBJ;
DECLARE_LHASH_OF(ADDED_OBJ);

static int new_nid = NUM_NID;
static LHASH_OF(ADDED_OBJ) *added = NULL;

static int sn_cmp(const ASN1_OBJECT * const *a, const unsigned int *b)
{
        return (strcmp((*a)->sn, nid_objs[*b].sn));
}


static int
sn_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_)
{
        const ASN1_OBJECT * const *a = a_;
        unsigned int const *b = b_;
        return sn_cmp(a, b);
}

static unsigned int *
OBJ_bsearch_sn(const ASN1_OBJECT * *key, unsigned int const *base, int num)
{
        return (unsigned int *)OBJ_bsearch_(key, base, num, sizeof(unsigned int),
            sn_cmp_BSEARCH_CMP_FN);
}

static int ln_cmp(const ASN1_OBJECT * const *a, const unsigned int *b)
{
        return (strcmp((*a)->ln, nid_objs[*b].ln));
}


static int
ln_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_)
{
        const ASN1_OBJECT * const *a = a_;
        unsigned int const *b = b_;
        return ln_cmp(a, b);
}

static unsigned int *
OBJ_bsearch_ln(const ASN1_OBJECT * *key, unsigned int const *base, int num)
{
        return (unsigned int *)OBJ_bsearch_(key, base, num, sizeof(unsigned int),
            ln_cmp_BSEARCH_CMP_FN);
}

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 = a->length << 20L;
                p = (unsigned char *)a->data;
                for (i = 0; i < a->length; i++)
                        ret ^= p[i] << ((i * 3) % 24);
                break;
        case ADDED_SNAME:
                ret = lh_strhash(a->sn);
                break;
        case ADDED_LNAME:
                ret = lh_strhash(a->ln);
                break;
        case ADDED_NID:
                ret = a->nid;
                break;
        default:
                /* abort(); */
                return 0;
        }
        ret &= 0x3fffffffL;
        ret |= ca->type << 30L;
        return (ret);
}
static IMPLEMENT_LHASH_HASH_FN(added_obj, ADDED_OBJ)

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 IMPLEMENT_LHASH_COMP_FN(added_obj, ADDED_OBJ)

static int
init_added(void)
{
        if (added != NULL)
                return (1);
        added = lh_ADDED_OBJ_new();
        return (added != NULL);
}

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);
        free(a);
}

static IMPLEMENT_LHASH_DOALL_FN(cleanup1, ADDED_OBJ)
static IMPLEMENT_LHASH_DOALL_FN(cleanup2, ADDED_OBJ)
static IMPLEMENT_LHASH_DOALL_FN(cleanup3, ADDED_OBJ)

/* The purpose of obj_cleanup_defer is to avoid EVP_cleanup() attempting
 * to use freed up OIDs. If neccessary the actual freeing up of OIDs is
 * delayed.
 */

int obj_cleanup_defer = 0;

void
check_defer(int nid)
{
        if (!obj_cleanup_defer && nid >= NUM_NID)
                obj_cleanup_defer = 1;
}

void
OBJ_cleanup(void)
{
        if (obj_cleanup_defer) {
                obj_cleanup_defer = 2;
                return;
        }
        if (added == NULL)
                return;
        lh_ADDED_OBJ_down_load(added) = 0;
        lh_ADDED_OBJ_doall(added, LHASH_DOALL_FN(cleanup1)); /* zero counters */
        lh_ADDED_OBJ_doall(added, LHASH_DOALL_FN(cleanup2)); /* set counters */
        lh_ADDED_OBJ_doall(added, LHASH_DOALL_FN(cleanup3)); /* free objects */
        lh_ADDED_OBJ_free(added);
        added = NULL;
}

int
OBJ_new_nid(int num)
{
        int i;

        i = new_nid;
        new_nid += num;
        return (i);
}

int
OBJ_add_object(const ASN1_OBJECT *obj)
{
        ASN1_OBJECT *o;
        ADDED_OBJ *ao[4] = {NULL, NULL, NULL, NULL}, *aop;
        int i;

        if (added == NULL)
                if (!init_added())
                        return (0);
        if ((o = OBJ_dup(obj)) == NULL)
                goto err;
        if (!(ao[ADDED_NID] = malloc(sizeof(ADDED_OBJ))))
                goto err2;
        if ((o->length != 0) && (obj->data != NULL))
                if (!(ao[ADDED_DATA] = malloc(sizeof(ADDED_OBJ))))
                        goto err2;
        if (o->sn != NULL)
                if (!(ao[ADDED_SNAME] = malloc(sizeof(ADDED_OBJ))))
                        goto err2;
        if (o->ln != NULL)
                if (!(ao[ADDED_LNAME] = malloc(sizeof(ADDED_OBJ))))
                        goto err2;

        for (i = ADDED_DATA; i <= ADDED_NID; i++) {
                if (ao[i] != NULL) {
                        ao[i]->type = i;
                        ao[i]->obj = o;
                        aop = lh_ADDED_OBJ_insert(added, ao[i]);
                        /* memory leak, buit should not normally matter */
                        free(aop);
                }
        }
        o->flags &= ~(ASN1_OBJECT_FLAG_DYNAMIC |
            ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
            ASN1_OBJECT_FLAG_DYNAMIC_DATA);

        return (o->nid);

 err2:
        OBJerror(ERR_R_MALLOC_FAILURE);
 err:
        for (i = ADDED_DATA; i <= ADDED_NID; i++)
                free(ao[i]);
        ASN1_OBJECT_free(o);
        return (NID_undef);
}

ASN1_OBJECT *
OBJ_nid2obj(int n)
{
        ADDED_OBJ ad, *adp;
        ASN1_OBJECT ob;

        if ((n >= 0) && (n < NUM_NID)) {
                if ((n != NID_undef) && (nid_objs[n].nid == NID_undef)) {
                        OBJerror(OBJ_R_UNKNOWN_NID);
                        return (NULL);
                }
                return ((ASN1_OBJECT *)&(nid_objs[n]));
        } else if (added == NULL)
                return (NULL);
        else {
                ad.type = ADDED_NID;
                ad.obj = &ob;
                ob.nid = n;
                adp = lh_ADDED_OBJ_retrieve(added, &ad);
                if (adp != NULL)
                        return (adp->obj);
                else {
                        OBJerror(OBJ_R_UNKNOWN_NID);
                        return (NULL);
                }
        }
}

const char *
OBJ_nid2sn(int n)
{
        ADDED_OBJ ad, *adp;
        ASN1_OBJECT ob;

        if ((n >= 0) && (n < NUM_NID)) {
                if ((n != NID_undef) && (nid_objs[n].nid == NID_undef)) {
                        OBJerror(OBJ_R_UNKNOWN_NID);
                        return (NULL);
                }
                return (nid_objs[n].sn);
        } else if (added == NULL)
                return (NULL);
        else {
                ad.type = ADDED_NID;
                ad.obj = &ob;
                ob.nid = n;
                adp = lh_ADDED_OBJ_retrieve(added, &ad);
                if (adp != NULL)
                        return (adp->obj->sn);
                else {
                        OBJerror(OBJ_R_UNKNOWN_NID);
                        return (NULL);
                }
        }
}

const char *
OBJ_nid2ln(int n)
{
        ADDED_OBJ ad, *adp;
        ASN1_OBJECT ob;

        if ((n >= 0) && (n < NUM_NID)) {
                if ((n != NID_undef) && (nid_objs[n].nid == NID_undef)) {
                        OBJerror(OBJ_R_UNKNOWN_NID);
                        return (NULL);
                }
                return (nid_objs[n].ln);
        } else if (added == NULL)
                return (NULL);
        else {
                ad.type = ADDED_NID;
                ad.obj = &ob;
                ob.nid = n;
                adp = lh_ADDED_OBJ_retrieve(added, &ad);
                if (adp != NULL)
                        return (adp->obj->ln);
                else {
                        OBJerror(OBJ_R_UNKNOWN_NID);
                        return (NULL);
                }
        }
}

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);
        return (memcmp(a->data, b->data, a->length));
}


static int
obj_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_)
{
        const ASN1_OBJECT * const *a = a_;
        unsigned int const *b = b_;
        return obj_cmp(a, b);
}

static unsigned int *
OBJ_bsearch_obj(const ASN1_OBJECT * *key, unsigned int const *base, int num)
{
        return (unsigned int *)OBJ_bsearch_(key, base, num, sizeof(unsigned int),
            obj_cmp_BSEARCH_CMP_FN);
}

int
OBJ_obj2nid(const ASN1_OBJECT *a)
{
        const unsigned int *op;
        ADDED_OBJ ad, *adp;

        if (a == NULL || a->length == 0)
                return (NID_undef);
        if (a->nid != NID_undef)
                return (a->nid);

        if (added != NULL) {
                ad.type = ADDED_DATA;
                ad.obj=(ASN1_OBJECT *)a; /* XXX: ugly but harmless */
                adp = lh_ADDED_OBJ_retrieve(added, &ad);
                if (adp != NULL)
                        return (adp->obj->nid);
        }
        op = OBJ_bsearch_obj(&a, obj_objs, NUM_OBJ);
        if (op == NULL)
                return (NID_undef);
        return (nid_objs[*op].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;

        if (!no_name) {
                if (((nid = OBJ_sn2nid(s)) != NID_undef) ||
                    ((nid = OBJ_ln2nid(s)) != NID_undef) )
                        return OBJ_nid2obj(nid);
        }

        return t2i_ASN1_OBJECT_internal(s);
}

int
OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *aobj, int no_name)
{
        if (aobj == NULL || aobj->data == NULL)
                return 0;

        return i2t_ASN1_OBJECT_internal(aobj, buf, buf_len, no_name);
}

int
OBJ_txt2nid(const char *s)
{
        ASN1_OBJECT *obj;
        int nid;

        obj = OBJ_txt2obj(s, 0);
        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;

        o.ln = s;
        if (added != NULL) {
                ad.type = ADDED_LNAME;
                ad.obj = &o;
                adp = lh_ADDED_OBJ_retrieve(added, &ad);
                if (adp != NULL)
                        return (adp->obj->nid);
        }
        op = OBJ_bsearch_ln(&oo, ln_objs, NUM_LN);
        if (op == NULL)
                return (NID_undef);
        return (nid_objs[*op].nid);
}

int
OBJ_sn2nid(const char *s)
{
        ASN1_OBJECT o;
        const ASN1_OBJECT *oo = &o;
        ADDED_OBJ ad, *adp;
        const unsigned int *op;

        o.sn = s;
        if (added != NULL) {
                ad.type = ADDED_SNAME;
                ad.obj = &o;
                adp = lh_ADDED_OBJ_retrieve(added, &ad);
                if (adp != NULL)
                        return (adp->obj->nid);
        }
        op = OBJ_bsearch_sn(&oo, sn_objs, NUM_SN);
        if (op == NULL)
                return (NID_undef);
        return (nid_objs[*op].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 *base = base_;
        int l, h, i = 0, c = 0;
        const char *p = NULL;

        if (num == 0)
                return (NULL);
        l = 0;
        h = num;
        while (l < h) {
                i = (l + h) / 2;
                p = &(base[i * size]);
                c = (*cmp)(key, p);
                if (c < 0)
                        h = i;
                else if (c > 0)
                        l = i + 1;
                else
                        break;
        }
        if (c != 0 && !(flags & OBJ_BSEARCH_VALUE_ON_NOMATCH))
                p = NULL;
        else if (c == 0 && (flags & OBJ_BSEARCH_FIRST_VALUE_ON_MATCH)) {
                while (i > 0 && (*cmp)(key, &(base[(i - 1) * size])) == 0)
                        i--;
                p = &(base[i * size]);
        }
        return (p);
}

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 (!isalnum((unsigned char)buf[0]))
                        return (num);
                o = s=buf;
                while (isdigit((unsigned char)*s) || (*s == '.'))
                        s++;
                if (*s != '\0') {
                        *(s++) = '\0';
                        while (isspace((unsigned char)*s))
                                s++;
                        if (*s == '\0')
                                s = NULL;
                        else {
                                l = s;
                                while ((*l != '\0') &&
                                    !isspace((unsigned char)*l))
                                        l++;
                                if (*l != '\0') {
                                        *(l++) = '\0';
                                        while (isspace((unsigned char)*l))
                                                l++;
                                        if (*l == '\0')
                                                l = NULL;
                                } else
                                        l = NULL;
                        }
                } else
                        s = NULL;
                if ((o == NULL) || (*o == '\0'))
                        return (num);
                if (!OBJ_create(o, s, l))
                        return (num);
                num++;
        }
        /* return(num); */
}

int
OBJ_create(const char *oid, const char *sn, const char *ln)
{
        int ok = 0;
        ASN1_OBJECT *op = NULL;
        unsigned char *buf;
        int i;

        i = a2d_ASN1_OBJECT(NULL, 0, oid, -1);
        if (i <= 0)
                return (0);

        if ((buf = malloc(i)) == NULL) {
                OBJerror(ERR_R_MALLOC_FAILURE);
                return (0);
        }
        i = a2d_ASN1_OBJECT(buf, i, oid, -1);
        if (i == 0)
                goto err;
        op = (ASN1_OBJECT *)ASN1_OBJECT_create(OBJ_new_nid(1), buf, i, sn, ln);
        if (op == NULL)
                goto err;
        ok = OBJ_add_object(op);

 err:
        ASN1_OBJECT_free(op);
        free(buf);
        return (ok);
}

size_t
OBJ_length(const ASN1_OBJECT *obj)
{
        if (obj == NULL)
                return 0;

        if (obj->length < 0)
                return 0;

        return obj->length;
}

const unsigned char *
OBJ_get0_data(const ASN1_OBJECT *obj)
{
        if (obj == NULL)
                return NULL;

        return obj->data;
}