1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/evp.h>
13#include <openssl/objects.h>
14#include "crypto/evp.h"
15
16static int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
17 const unsigned char *iv, int enc);
18static int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
19 const unsigned char *in, size_t inl);
20static const EVP_CIPHER n_cipher = {
21 NID_undef,
22 1, 0, 0, 0,
23 null_init_key,
24 null_cipher,
25 NULL,
26 0,
27 NULL,
28 NULL,
29 NULL,
30 NULL
31};
32
33const EVP_CIPHER *EVP_enc_null(void)
34{
35 return &n_cipher;
36}
37
38static int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
39 const unsigned char *iv, int enc)
40{
41 return 1;
42}
43
44static int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
45 const unsigned char *in, size_t inl)
46{
47 if (in != out)
48 memcpy(out, in, inl);
49 return 1;
50}
51