/* crypto/evp/names.c */

/* 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 "cryptlib.h"

#include <openssl/evp.h>

#include <openssl/objects.h>

#include <openssl/x509.h>

int EVP_add_cipher(const EVP_CIPHER *c)

{

    int r;

    if (c == NULL)

        return 0;

    OPENSSL_init();

    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;

    OPENSSL_init();

    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)

{

    const EVP_CIPHER *cp;

    cp = (const EVP_CIPHER *)OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);

    return (cp);

}

const EVP_MD *EVP_get_digestbyname(const char *name)

{

    const EVP_MD *cp;

    cp = (const EVP_MD *)OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);

    return (cp);

}

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();

    }

    OBJ_sigid_free();

}

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;

    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;

    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;

    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;

    dc.fn = fn;

    dc.arg = arg;

    OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);

}