e_rc4.c revision 296341
155714Skris/* crypto/evp/e_rc4.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280297Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280297Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280297Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280297Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280297Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280297Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 61160814Ssimon 62160814Ssimon#ifndef OPENSSL_NO_RC4 63160814Ssimon 64280297Sjkim# include <openssl/evp.h> 65280297Sjkim# include "evp_locl.h" 66280297Sjkim# include <openssl/objects.h> 67280297Sjkim# include <openssl/rc4.h> 68280297Sjkim 69280297Sjkim/* FIXME: surely this is available elsewhere? */ 7055714Skris# define EVP_RC4_KEY_SIZE 16 71109998Smarkm 72280297Sjkimtypedef struct { 73280297Sjkim RC4_KEY ks; /* working key */ 74280297Sjkim} EVP_RC4_KEY; 75109998Smarkm 76280297Sjkim# define data(ctx) ((EVP_RC4_KEY *)(ctx)->cipher_data) 77280297Sjkim 78280297Sjkimstatic int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 79280297Sjkim const unsigned char *iv, int enc); 80109998Smarkmstatic int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 81280297Sjkim const unsigned char *in, size_t inl); 82280297Sjkimstatic const EVP_CIPHER r4_cipher = { 83280297Sjkim NID_rc4, 84280297Sjkim 1, EVP_RC4_KEY_SIZE, 0, 85109998Smarkm EVP_CIPH_VARIABLE_LENGTH, 86280297Sjkim rc4_init_key, 87280297Sjkim rc4_cipher, 88280297Sjkim NULL, 89280297Sjkim sizeof(EVP_RC4_KEY), 90280297Sjkim NULL, 91280297Sjkim NULL, 92280297Sjkim NULL, 93280297Sjkim NULL 94280297Sjkim}; 95280297Sjkim 96280297Sjkimstatic const EVP_CIPHER r4_40_cipher = { 97280297Sjkim NID_rc4_40, 98280297Sjkim 1, 5 /* 40 bit */ , 0, 99280297Sjkim EVP_CIPH_VARIABLE_LENGTH, 10055714Skris rc4_init_key, 101109998Smarkm rc4_cipher, 102280297Sjkim NULL, 103280297Sjkim sizeof(EVP_RC4_KEY), 104280297Sjkim NULL, 10555714Skris NULL, 106 NULL, 107 NULL 108}; 109 110const EVP_CIPHER *EVP_rc4(void) 111{ 112 return (&r4_cipher); 113} 114 115const EVP_CIPHER *EVP_rc4_40(void) 116{ 117 return (&r4_40_cipher); 118} 119 120static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 121 const unsigned char *iv, int enc) 122{ 123 RC4_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), key); 124 return 1; 125} 126 127static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 128 const unsigned char *in, size_t inl) 129{ 130 RC4(&data(ctx)->ks, inl, in, out); 131 return 1; 132} 133#endif 134