/*

 * Copyright 2020-2021 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 <string.h>

#include <openssl/err.h>

#include "crypto/ecx.h"

ECX_KEY *ossl_ecx_key_new(OSSL_LIB_CTX *libctx, ECX_KEY_TYPE type, int haspubkey,

                          const char *propq)

{

    ECX_KEY *ret = OPENSSL_zalloc(sizeof(*ret));

    if (ret == NULL)

        return NULL;

    ret->libctx = libctx;

    ret->haspubkey = haspubkey;

    switch (type) {

    case ECX_KEY_TYPE_X25519:

        ret->keylen = X25519_KEYLEN;

        break;

    case ECX_KEY_TYPE_X448:

        ret->keylen = X448_KEYLEN;

        break;

    case ECX_KEY_TYPE_ED25519:

        ret->keylen = ED25519_KEYLEN;

        break;

    case ECX_KEY_TYPE_ED448:

        ret->keylen = ED448_KEYLEN;

        break;

    }

    ret->type = type;

    ret->references = 1;

    if (propq != NULL) {

        ret->propq = OPENSSL_strdup(propq);

        if (ret->propq == NULL)

            goto err;

    }

    ret->lock = CRYPTO_THREAD_lock_new();

    if (ret->lock == NULL)

        goto err;

    return ret;

err:

    ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);

    OPENSSL_free(ret);

    return NULL;

}

void ossl_ecx_key_free(ECX_KEY *key)

{

    int i;

    if (key == NULL)

        return;

    CRYPTO_DOWN_REF(&key->references, &i, key->lock);

    REF_PRINT_COUNT("ECX_KEY", key);

    if (i > 0)

        return;

    REF_ASSERT_ISNT(i < 0);

    OPENSSL_free(key->propq);

    OPENSSL_secure_clear_free(key->privkey, key->keylen);

    CRYPTO_THREAD_lock_free(key->lock);

    OPENSSL_free(key);

}

void ossl_ecx_key_set0_libctx(ECX_KEY *key, OSSL_LIB_CTX *libctx)

{

    key->libctx = libctx;

}

int ossl_ecx_key_up_ref(ECX_KEY *key)

{

    int i;

    if (CRYPTO_UP_REF(&key->references, &i, key->lock) <= 0)

        return 0;

    REF_PRINT_COUNT("ECX_KEY", key);

    REF_ASSERT_ISNT(i < 2);

    return ((i > 1) ? 1 : 0);

}

unsigned char *ossl_ecx_key_allocate_privkey(ECX_KEY *key)

{

    key->privkey = OPENSSL_secure_zalloc(key->keylen);

    return key->privkey;

}