1*1dcdf01fSchristos /*
2*1dcdf01fSchristos * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
360662d10Schristos *
4*1dcdf01fSchristos * Licensed under the OpenSSL license (the "License"). You may not use
5*1dcdf01fSchristos * this file except in compliance with the License. You can obtain a copy
6*1dcdf01fSchristos * in the file LICENSE in the source distribution or at
7*1dcdf01fSchristos * https://www.openssl.org/source/license.html
860662d10Schristos */
960662d10Schristos
1060662d10Schristos #include <stdio.h>
11*1dcdf01fSchristos #include "internal/cryptlib.h"
1260662d10Schristos #include <openssl/evp.h>
1360662d10Schristos #include <openssl/objects.h>
14*1dcdf01fSchristos #include "crypto/evp.h"
1560662d10Schristos
1660662d10Schristos static int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
1760662d10Schristos const unsigned char *iv, int enc);
1860662d10Schristos static int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
1960662d10Schristos const unsigned char *in, size_t inl);
2060662d10Schristos static const EVP_CIPHER n_cipher = {
2160662d10Schristos NID_undef,
22*1dcdf01fSchristos 1, 0, 0, 0,
2360662d10Schristos null_init_key,
2460662d10Schristos null_cipher,
2560662d10Schristos NULL,
2660662d10Schristos 0,
2760662d10Schristos NULL,
2860662d10Schristos NULL,
2960662d10Schristos NULL,
3060662d10Schristos NULL
3160662d10Schristos };
3260662d10Schristos
EVP_enc_null(void)3360662d10Schristos const EVP_CIPHER *EVP_enc_null(void)
3460662d10Schristos {
35*1dcdf01fSchristos return &n_cipher;
3660662d10Schristos }
3760662d10Schristos
null_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)3860662d10Schristos static int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
3960662d10Schristos const unsigned char *iv, int enc)
4060662d10Schristos {
4160662d10Schristos return 1;
4260662d10Schristos }
4360662d10Schristos
null_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)4460662d10Schristos static int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
4560662d10Schristos const unsigned char *in, size_t inl)
4660662d10Schristos {
4760662d10Schristos if (in != out)
48*1dcdf01fSchristos memcpy(out, in, inl);
4960662d10Schristos return 1;
5060662d10Schristos }
51