/* 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 "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include "internal/evp_int.h"

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)
{
    const EVP_CIPHER *cp;

    if (!OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL))
        return NULL;

    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;

    if (!OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL))
        return NULL;

    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;

    /* Ignore errors */
    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, 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;

    /* Ignore errors */
    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, 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;

    /* Ignore errors */
    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, 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;

    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);

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