openssl/crypto/evp/cmeth_lib.c

/*
 * Written by Richard Levitte (levitte@openssl.org) for the OpenSSL project
 * 2015.
 */
/* ====================================================================
 * Copyright (c) 2015 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 <string.h>

#include <openssl/evp.h>
#include "internal/evp_int.h"
#include "evp_locl.h"

EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len)
{
    EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));

    if (cipher != NULL) {
        cipher->nid = cipher_type;
        cipher->block_size = block_size;
        cipher->key_len = key_len;
    }
    return cipher;
}

EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher)
{
    EVP_CIPHER *to = EVP_CIPHER_meth_new(cipher->nid, cipher->block_size,
                                         cipher->key_len);

    if (to != NULL)
        memcpy(to, cipher, sizeof(*to));
    return to;
}

void EVP_CIPHER_meth_free(EVP_CIPHER *cipher)
{
    OPENSSL_free(cipher);
}

int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len)
{
    cipher->iv_len = iv_len;
    return 1;
}

int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags)
{
    cipher->flags = flags;
    return 1;
}

int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size)
{
    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))
{
    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))
{
    cipher->do_cipher = do_cipher;
    return 1;
}

int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
                                int (*cleanup) (EVP_CIPHER_CTX *))
{
    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 *))
{
    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 *))
{
    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))
{
    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;
}