/* crypto/objects/obj_xref.c */

/*

 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project

 * 2006.

 */

/* ====================================================================

 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.

 *

 * 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 above 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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <openssl/objects.h>

#include "obj_xref.h"

DECLARE_STACK_OF(nid_triple)

STACK_OF(nid_triple) *sig_app, *sigx_app;

static int sig_cmp(const nid_triple *a, const nid_triple *b)

{

    return a->sign_id - b->sign_id;

}

DECLARE_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);

IMPLEMENT_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);

static int sig_sk_cmp(const nid_triple *const *a, const nid_triple *const *b)

{

    return (*a)->sign_id - (*b)->sign_id;

}

DECLARE_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);

static int sigx_cmp(const nid_triple *const *a, const nid_triple *const *b)

{

    int ret;

    ret = (*a)->hash_id - (*b)->hash_id;

    if (ret)

        return ret;

    return (*a)->pkey_id - (*b)->pkey_id;

}

IMPLEMENT_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);

int OBJ_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid)

{

    nid_triple tmp;

    const nid_triple *rv = NULL;

    tmp.sign_id = signid;

    if (sig_app) {

        int idx = sk_nid_triple_find(sig_app, &tmp);

        if (idx >= 0)

            rv = sk_nid_triple_value(sig_app, idx);

    }

#ifndef OBJ_XREF_TEST2

    if (rv == NULL) {

        rv = OBJ_bsearch_sig(&tmp, sigoid_srt,

                             sizeof(sigoid_srt) / sizeof(nid_triple));

    }

#endif

    if (rv == NULL)

        return 0;

    if (pdig_nid)

        *pdig_nid = rv->hash_id;

    if (ppkey_nid)

        *ppkey_nid = rv->pkey_id;

    return 1;

}

int OBJ_find_sigid_by_algs(int *psignid, int dig_nid, int pkey_nid)

{

    nid_triple tmp;

    const nid_triple *t = &tmp;

    const nid_triple **rv = NULL;

    tmp.hash_id = dig_nid;

    tmp.pkey_id = pkey_nid;

    if (sigx_app) {

        int idx = sk_nid_triple_find(sigx_app, &tmp);

        if (idx >= 0) {

            t = sk_nid_triple_value(sigx_app, idx);

            rv = &t;

        }

    }

#ifndef OBJ_XREF_TEST2

    if (rv == NULL) {

        rv = OBJ_bsearch_sigx(&t, sigoid_srt_xref,

                              sizeof(sigoid_srt_xref) / sizeof(nid_triple *)

            );

    }

#endif

    if (rv == NULL)

        return 0;

    if (psignid)

        *psignid = (*rv)->sign_id;

    return 1;

}

int OBJ_add_sigid(int signid, int dig_id, int pkey_id)

{

    nid_triple *ntr;

    if (!sig_app)

        sig_app = sk_nid_triple_new(sig_sk_cmp);

    if (!sig_app)

        return 0;

    if (!sigx_app)

        sigx_app = sk_nid_triple_new(sigx_cmp);

    if (!sigx_app)

        return 0;

    ntr = OPENSSL_malloc(sizeof(int) * 3);

    if (!ntr)

        return 0;

    ntr->sign_id = signid;

    ntr->hash_id = dig_id;

    ntr->pkey_id = pkey_id;

    if (!sk_nid_triple_push(sig_app, ntr)) {

        OPENSSL_free(ntr);

        return 0;

    }

    if (!sk_nid_triple_push(sigx_app, ntr))

        return 0;

    sk_nid_triple_sort(sig_app);

    sk_nid_triple_sort(sigx_app);

    return 1;

}

static void sid_free(nid_triple *tt)

{

    OPENSSL_free(tt);

}

void OBJ_sigid_free(void)

{

    if (sig_app) {

        sk_nid_triple_pop_free(sig_app, sid_free);

        sig_app = NULL;

    }

    if (sigx_app) {

        sk_nid_triple_free(sigx_app);

        sigx_app = NULL;

    }

}

#ifdef OBJ_XREF_TEST

main()

{

    int n1, n2, n3;

    int i, rv;

# ifdef OBJ_XREF_TEST2

    for (i = 0; i < sizeof(sigoid_srt) / sizeof(nid_triple); i++) {

        OBJ_add_sigid(sigoid_srt[i][0], sigoid_srt[i][1], sigoid_srt[i][2]);

    }

# endif

    for (i = 0; i < sizeof(sigoid_srt) / sizeof(nid_triple); i++) {

        n1 = sigoid_srt[i][0];

        rv = OBJ_find_sigid_algs(n1, &n2, &n3);

        printf("Forward: %d, %s %s %s\n", rv,

               OBJ_nid2ln(n1), OBJ_nid2ln(n2), OBJ_nid2ln(n3));

        n1 = 0;

        rv = OBJ_find_sigid_by_algs(&n1, n2, n3);

        printf("Reverse: %d, %s %s %s\n", rv,

               OBJ_nid2ln(n1), OBJ_nid2ln(n2), OBJ_nid2ln(n3));

    }

}

#endif