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 | |
16 | static int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
17 | const unsigned char *iv, int enc); |
18 | static int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
19 | const unsigned char *in, size_t inl); |
20 | static 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 | |
33 | const EVP_CIPHER *EVP_enc_null(void) |
34 | { |
35 | return &n_cipher; |
36 | } |
37 | |
38 | static 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 | |
44 | static 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 | |