e_null.c revision 225736
1223013Sdim/* crypto/evp/e_null.c */ 2223013Sdim/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3223013Sdim * All rights reserved. 4223013Sdim * 5223013Sdim * This package is an SSL implementation written 6223013Sdim * by Eric Young (eay@cryptsoft.com). 7223013Sdim * The implementation was written so as to conform with Netscapes SSL. 8223013Sdim * 9223013Sdim * This library is free for commercial and non-commercial use as long as 10223013Sdim * the following conditions are aheared to. The following conditions 11223013Sdim * apply to all code found in this distribution, be it the RC4, RSA, 12223013Sdim * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13223013Sdim * included with this distribution is covered by the same copyright terms 14223013Sdim * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15223013Sdim * 16249423Sdim * Copyright remains Eric Young's, and as such any Copyright notices in 17226633Sdim * the code are not to be removed. 18226633Sdim * If this package is used in a product, Eric Young should be given attribution 19223013Sdim * as the author of the parts of the library used. 20223013Sdim * This can be in the form of a textual message at program startup or 21223013Sdim * in documentation (online or textual) provided with the package. 22223013Sdim * 23223013Sdim * Redistribution and use in source and binary forms, with or without 24223013Sdim * modification, are permitted provided that the following conditions 25223013Sdim * are met: 26223013Sdim * 1. Redistributions of source code must retain the copyright 27223013Sdim * notice, this list of conditions and the following disclaimer. 28223013Sdim * 2. Redistributions in binary form must reproduce the above copyright 29223013Sdim * notice, this list of conditions and the following disclaimer in the 30263508Sdim * documentation and/or other materials provided with the distribution. 31263508Sdim * 3. All advertising materials mentioning features or use of this software 32243830Sdim * must display the following acknowledgement: 33223013Sdim * "This product includes cryptographic software written by 34223013Sdim * Eric Young (eay@cryptsoft.com)" 35223013Sdim * The word 'cryptographic' can be left out if the rouines from the library 36223013Sdim * being used are not cryptographic related :-). 37223013Sdim * 4. If you include any Windows specific code (or a derivative thereof) from 38263508Sdim * the apps directory (application code) you must include an acknowledgement: 39263508Sdim * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40223013Sdim * 41243830Sdim * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42243830Sdim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43223013Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44243830Sdim * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45243830Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46223013Sdim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47223013Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48223013Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49223013Sdim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50223013Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51223013Sdim * SUCH DAMAGE. 52223013Sdim * 53223013Sdim * The licence and distribution terms for any publically available version or 54263508Sdim * derivative of this code cannot be changed. i.e. this code cannot simply be 55263508Sdim * copied and put under another distribution licence 56223013Sdim * [including the GNU Public Licence.] 57243830Sdim */ 58243830Sdim 59223013Sdim#include <stdio.h> 60243830Sdim#include "cryptlib.h" 61243830Sdim#include <openssl/evp.h> 62223013Sdim#include <openssl/objects.h> 63223013Sdim 64223013Sdimstatic int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 65223013Sdim const unsigned char *iv,int enc); 66223013Sdimstatic int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 67223013Sdim const unsigned char *in, unsigned int inl); 68223013Sdimstatic const EVP_CIPHER n_cipher= 69223013Sdim { 70223013Sdim NID_undef, 71223013Sdim 1,0,0, 72243830Sdim EVP_CIPH_FLAG_FIPS, 73223013Sdim null_init_key, 74263508Sdim null_cipher, 75263508Sdim NULL, 76223013Sdim 0, 77243830Sdim NULL, 78243830Sdim NULL, 79223013Sdim NULL, 80243830Sdim NULL 81243830Sdim }; 82223013Sdim 83243830Sdimconst EVP_CIPHER *EVP_enc_null(void) 84243830Sdim { 85243830Sdim return(&n_cipher); 86223013Sdim } 87223013Sdim 88223013Sdimstatic int null_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 89223013Sdim const unsigned char *iv, int enc) 90223013Sdim { 91263508Sdim /* memset(&(ctx->c),0,sizeof(ctx->c));*/ 92263508Sdim return 1; 93263508Sdim } 94223013Sdim 95243830Sdimstatic int null_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 96243830Sdim const unsigned char *in, unsigned int inl) 97223013Sdim { 98223013Sdim if (in != out) 99223013Sdim memcpy((char *)out,(const char *)in,(size_t)inl); 100223013Sdim return 1; 101223013Sdim } 102223013Sdim 103223013Sdim