1 /* 2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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