/*

 * Copyright 2015-2021 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

 */

/*

 * EVP _meth_ APIs are deprecated for public use, but still ok for

 * internal use.

 */

#include "internal/deprecated.h"

#include <string.h>

#include <openssl/evp.h>

#include "crypto/evp.h"

#include "internal/provider.h"

#include "evp_local.h"

EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len)

{

    EVP_CIPHER *cipher = evp_cipher_new();

    if (cipher != NULL) {

        cipher->nid = cipher_type;

        cipher->block_size = block_size;

        cipher->key_len = key_len;

        cipher->origin = EVP_ORIG_METH;

    }

    return cipher;

}

EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher)

{

    EVP_CIPHER *to = NULL;

    /*

     * Non-legacy EVP_CIPHERs can't be duplicated like this.

     * Use EVP_CIPHER_up_ref() instead.

     */

    if (cipher->prov != NULL)

        return NULL;

    if ((to = EVP_CIPHER_meth_new(cipher->nid, cipher->block_size,

                                  cipher->key_len)) != NULL) {

        CRYPTO_RWLOCK *lock = to->lock;

        memcpy(to, cipher, sizeof(*to));

        to->lock = lock;

        to->origin = EVP_ORIG_METH;

    }

    return to;

}

void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)

{

    if (cipher == NULL || cipher->origin != EVP_ORIG_METH)

       return;

    evp_cipher_free_int(cipher);

}

int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)

{

    if (cipher->iv_len != 0)

        return 0;

    cipher->iv_len = iv_len;

    return 1;

}

int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)

{

    if (cipher->flags != 0)

        return 0;

    cipher->flags = flags;

    return 1;

}

int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size)

{

    if (cipher->ctx_size != 0)

        return 0;

    cipher->ctx_size = ctx_size;

    return 1;

}

int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,

                             int (*init) (EVP_CIPHER_CTX *ctx,

                                          const unsigned char *key,

                                          const unsigned char *iv,

                                          int enc))

{

    if (cipher->init != NULL)

        return 0;

    cipher->init = init;

    return 1;

}

int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,

                                  int (*do_cipher) (EVP_CIPHER_CTX *ctx,

                                                    unsigned char *out,

                                                    const unsigned char *in,

                                                    size_t inl))

{

    if (cipher->do_cipher != NULL)

        return 0;

    cipher->do_cipher = do_cipher;

    return 1;

}

int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,

                                int (*cleanup) (EVP_CIPHER_CTX *))

{

    if (cipher->cleanup != NULL)

        return 0;

    cipher->cleanup = cleanup;

    return 1;

}

int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,

                                        int (*set_asn1_parameters) (EVP_CIPHER_CTX *,

                                                                    ASN1_TYPE *))

{

    if (cipher->set_asn1_parameters != NULL)

        return 0;

    cipher->set_asn1_parameters = set_asn1_parameters;

    return 1;

}

int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,

                                        int (*get_asn1_parameters) (EVP_CIPHER_CTX *,

                                                                    ASN1_TYPE *))

{

    if (cipher->get_asn1_parameters != NULL)

        return 0;

    cipher->get_asn1_parameters = get_asn1_parameters;

    return 1;

}

int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,

                             int (*ctrl) (EVP_CIPHER_CTX *, int type,

                                          int arg, void *ptr))

{

    if (cipher->ctrl != NULL)

        return 0;

    cipher->ctrl = ctrl;

    return 1;

}

int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,

                                                          const unsigned char *key,

                                                          const unsigned char *iv,

                                                          int enc)

{

    return cipher->init;

}

int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,

                                                               unsigned char *out,

                                                               const unsigned char *in,

                                                               size_t inl)

{

    return cipher->do_cipher;

}

int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *)

{

    return cipher->cleanup;

}

int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,

                                                                     ASN1_TYPE *)

{

    return cipher->set_asn1_parameters;

}

int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,

                                                               ASN1_TYPE *)

{

    return cipher->get_asn1_parameters;

}

int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,

                                                          int type, int arg,

                                                          void *ptr)

{

    return cipher->ctrl;

}