/* $OpenBSD: names.c,v 1.21 2023/08/26 02:59:13 tb 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 <stdio.h>

#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>

#include "evp_local.h"

extern int obj_cleanup_defer;
void check_defer(int nid);

int
EVP_add_cipher(const EVP_CIPHER *c)
{
	int r;

	if (c == NULL)
		return 0;

	r = OBJ_NAME_add(OBJ_nid2sn(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
	    (const char *)c);
	if (r == 0)
		return (0);
	check_defer(c->nid);
	r = OBJ_NAME_add(OBJ_nid2ln(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
	    (const char *)c);
	return (r);
}

int
EVP_add_digest(const EVP_MD *md)
{
	int r;
	const char *name;

	name = OBJ_nid2sn(md->type);
	r = OBJ_NAME_add(name, OBJ_NAME_TYPE_MD_METH, (const char *)md);
	if (r == 0)
		return (0);
	check_defer(md->type);
	r = OBJ_NAME_add(OBJ_nid2ln(md->type), OBJ_NAME_TYPE_MD_METH,
	    (const char *)md);
	if (r == 0)
		return (0);

	if (md->pkey_type && md->type != md->pkey_type) {
		r = OBJ_NAME_add(OBJ_nid2sn(md->pkey_type),
		    OBJ_NAME_TYPE_MD_METH|OBJ_NAME_ALIAS, name);
		if (r == 0)
			return (0);
		check_defer(md->pkey_type);
		r = OBJ_NAME_add(OBJ_nid2ln(md->pkey_type),
		    OBJ_NAME_TYPE_MD_METH|OBJ_NAME_ALIAS, name);
	}
	return (r);
}

const EVP_CIPHER *
EVP_get_cipherbyname(const char *name)
{
	if (!OPENSSL_init_crypto(0, NULL))
		return NULL;

	return (const EVP_CIPHER *)OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
}

const EVP_MD *
EVP_get_digestbyname(const char *name)
{
	if (!OPENSSL_init_crypto(0, NULL))
		return NULL;

	return (const EVP_MD *)OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
}

void
EVP_cleanup(void)
{
	OBJ_NAME_cleanup(OBJ_NAME_TYPE_CIPHER_METH);
	OBJ_NAME_cleanup(OBJ_NAME_TYPE_MD_METH);
	/* The above calls will only clean out the contents of the name
	   hash table, but not the hash table itself.  The following line
	   does that part.  -- Richard Levitte */
	OBJ_NAME_cleanup(-1);

	EVP_PBE_cleanup();
	if (obj_cleanup_defer == 2) {
		obj_cleanup_defer = 0;
		OBJ_cleanup();
	}
}

struct doall_cipher {
	void *arg;
	void (*fn)(const EVP_CIPHER *ciph, const char *from, const char *to,
	    void *arg);
};

static void
do_all_cipher_fn(const OBJ_NAME *nm, void *arg)
{
	struct doall_cipher *dc = arg;

	if (nm->alias)
		dc->fn(NULL, nm->name, nm->data, dc->arg);
	else
		dc->fn((const EVP_CIPHER *)nm->data, nm->name, NULL, dc->arg);
}

void
EVP_CIPHER_do_all(void (*fn)(const EVP_CIPHER *ciph, const char *from,
    const char *to, void *x), void *arg)
{
	struct doall_cipher dc;

	/* Prayer and clean living lets you ignore errors, OpenSSL style */
	(void) OPENSSL_init_crypto(0, NULL);

	dc.fn = fn;
	dc.arg = arg;
	OBJ_NAME_do_all(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
}

void
EVP_CIPHER_do_all_sorted(void (*fn)(const EVP_CIPHER *ciph, const char *from,
    const char *to, void *x), void *arg)
{
	struct doall_cipher dc;

	/* Prayer and clean living lets you ignore errors, OpenSSL style */
	(void) OPENSSL_init_crypto(0, NULL);

	dc.fn = fn;
	dc.arg = arg;
	OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
	    do_all_cipher_fn, &dc);
}

struct doall_md {
	void *arg;
	void (*fn)(const EVP_MD *ciph, const char *from, const char *to,
	    void *arg);
};

static void
do_all_md_fn(const OBJ_NAME *nm, void *arg)
{
	struct doall_md *dc = arg;

	if (nm->alias)
		dc->fn(NULL, nm->name, nm->data, dc->arg);
	else
		dc->fn((const EVP_MD *)nm->data, nm->name, NULL, dc->arg);
}

void
EVP_MD_do_all(void (*fn)(const EVP_MD *md, const char *from, const char *to,
    void *x), void *arg)
{
	struct doall_md dc;

	/* Prayer and clean living lets you ignore errors, OpenSSL style */
	(void) OPENSSL_init_crypto(0, NULL);

	dc.fn = fn;
	dc.arg = arg;
	OBJ_NAME_do_all(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
}

void
EVP_MD_do_all_sorted(void (*fn)(const EVP_MD *md,
    const char *from, const char *to, void *x), void *arg)
{
	struct doall_md dc;

	/* Prayer and clean living lets you ignore errors, OpenSSL style */
	(void) OPENSSL_init_crypto(0, NULL);

	dc.fn = fn;
	dc.arg = arg;
	OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
}
