/*

 * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <openssl/objects.h>

#include "obj_xref.h"

#include "internal/nelem.h"

#include <openssl/err.h>

static 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 != NULL) {

        int idx = sk_nid_triple_find(sig_app, &tmp);

        rv = sk_nid_triple_value(sig_app, idx);

    }

#ifndef OBJ_XREF_TEST2

    if (rv == NULL) {

        rv = OBJ_bsearch_sig(&tmp, sigoid_srt, OSSL_NELEM(sigoid_srt));

    }

#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, OSSL_NELEM(sigoid_srt_xref));

    }

#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 == NULL)

        sig_app = sk_nid_triple_new(sig_sk_cmp);

    if (sig_app == NULL)

        return 0;

    if (sigx_app == NULL)

        sigx_app = sk_nid_triple_new(sigx_cmp);

    if (sigx_app == NULL)

        return 0;

    if ((ntr = OPENSSL_malloc(sizeof(*ntr))) == NULL) {

        ERR_raise(ERR_LIB_OBJ, ERR_R_MALLOC_FAILURE);

        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)

{

    sk_nid_triple_pop_free(sig_app, sid_free);

    sig_app = NULL;

    sk_nid_triple_free(sigx_app);

    sigx_app = NULL;

}