174664626SKris Kennaway /* crypto/evp/e_rc4.c */ 274664626SKris Kennaway /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 374664626SKris Kennaway * All rights reserved. 474664626SKris Kennaway * 574664626SKris Kennaway * This package is an SSL implementation written 674664626SKris Kennaway * by Eric Young (eay@cryptsoft.com). 774664626SKris Kennaway * The implementation was written so as to conform with Netscapes SSL. 874664626SKris Kennaway * 974664626SKris Kennaway * This library is free for commercial and non-commercial use as long as 1074664626SKris Kennaway * the following conditions are aheared to. The following conditions 1174664626SKris Kennaway * apply to all code found in this distribution, be it the RC4, RSA, 1274664626SKris Kennaway * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1374664626SKris Kennaway * included with this distribution is covered by the same copyright terms 1474664626SKris Kennaway * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1574664626SKris Kennaway * 1674664626SKris Kennaway * Copyright remains Eric Young's, and as such any Copyright notices in 1774664626SKris Kennaway * the code are not to be removed. 1874664626SKris Kennaway * If this package is used in a product, Eric Young should be given attribution 1974664626SKris Kennaway * as the author of the parts of the library used. 2074664626SKris Kennaway * This can be in the form of a textual message at program startup or 2174664626SKris Kennaway * in documentation (online or textual) provided with the package. 2274664626SKris Kennaway * 2374664626SKris Kennaway * Redistribution and use in source and binary forms, with or without 2474664626SKris Kennaway * modification, are permitted provided that the following conditions 2574664626SKris Kennaway * are met: 2674664626SKris Kennaway * 1. Redistributions of source code must retain the copyright 2774664626SKris Kennaway * notice, this list of conditions and the following disclaimer. 2874664626SKris Kennaway * 2. Redistributions in binary form must reproduce the above copyright 2974664626SKris Kennaway * notice, this list of conditions and the following disclaimer in the 3074664626SKris Kennaway * documentation and/or other materials provided with the distribution. 3174664626SKris Kennaway * 3. All advertising materials mentioning features or use of this software 3274664626SKris Kennaway * must display the following acknowledgement: 3374664626SKris Kennaway * "This product includes cryptographic software written by 3474664626SKris Kennaway * Eric Young (eay@cryptsoft.com)" 3574664626SKris Kennaway * The word 'cryptographic' can be left out if the rouines from the library 3674664626SKris Kennaway * being used are not cryptographic related :-). 3774664626SKris Kennaway * 4. If you include any Windows specific code (or a derivative thereof) from 3874664626SKris Kennaway * the apps directory (application code) you must include an acknowledgement: 3974664626SKris Kennaway * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4074664626SKris Kennaway * 4174664626SKris Kennaway * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4274664626SKris Kennaway * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4374664626SKris Kennaway * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4474664626SKris Kennaway * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4574664626SKris Kennaway * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4674664626SKris Kennaway * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4774664626SKris Kennaway * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4874664626SKris Kennaway * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4974664626SKris Kennaway * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5074664626SKris Kennaway * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5174664626SKris Kennaway * SUCH DAMAGE. 5274664626SKris Kennaway * 5374664626SKris Kennaway * The licence and distribution terms for any publically available version or 5474664626SKris Kennaway * derivative of this code cannot be changed. i.e. this code cannot simply be 5574664626SKris Kennaway * copied and put under another distribution licence 5674664626SKris Kennaway * [including the GNU Public Licence.] 5774664626SKris Kennaway */ 5874664626SKris Kennaway 5974664626SKris Kennaway #include <stdio.h> 6074664626SKris Kennaway #include "cryptlib.h" 613b4e3dcbSSimon L. B. Nielsen 623b4e3dcbSSimon L. B. Nielsen #ifndef OPENSSL_NO_RC4 633b4e3dcbSSimon L. B. Nielsen 6474664626SKris Kennaway #include <openssl/evp.h> 651f13597dSJung-uk Kim #include "evp_locl.h" 6674664626SKris Kennaway #include <openssl/objects.h> 675c87c606SMark Murray #include <openssl/rc4.h> 685c87c606SMark Murray 695c87c606SMark Murray /* FIXME: surely this is available elsewhere? */ 705c87c606SMark Murray #define EVP_RC4_KEY_SIZE 16 715c87c606SMark Murray 725c87c606SMark Murray typedef struct 735c87c606SMark Murray { 745c87c606SMark Murray RC4_KEY ks; /* working key */ 755c87c606SMark Murray } EVP_RC4_KEY; 765c87c606SMark Murray 775c87c606SMark Murray #define data(ctx) ((EVP_RC4_KEY *)(ctx)->cipher_data) 7874664626SKris Kennaway 79ddd58736SKris Kennaway static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 80ddd58736SKris Kennaway const unsigned char *iv,int enc); 81ddd58736SKris Kennaway static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 821f13597dSJung-uk Kim const unsigned char *in, size_t inl); 835c87c606SMark Murray static const EVP_CIPHER r4_cipher= 8474664626SKris Kennaway { 8574664626SKris Kennaway NID_rc4, 8674664626SKris Kennaway 1,EVP_RC4_KEY_SIZE,0, 87ddd58736SKris Kennaway EVP_CIPH_VARIABLE_LENGTH, 8874664626SKris Kennaway rc4_init_key, 8974664626SKris Kennaway rc4_cipher, 9074664626SKris Kennaway NULL, 915c87c606SMark Murray sizeof(EVP_RC4_KEY), 9274664626SKris Kennaway NULL, 9374664626SKris Kennaway NULL, 943b4e3dcbSSimon L. B. Nielsen NULL, 95ddd58736SKris Kennaway NULL 9674664626SKris Kennaway }; 9774664626SKris Kennaway 985c87c606SMark Murray static const EVP_CIPHER r4_40_cipher= 9974664626SKris Kennaway { 10074664626SKris Kennaway NID_rc4_40, 10174664626SKris Kennaway 1,5 /* 40 bit */,0, 102ddd58736SKris Kennaway EVP_CIPH_VARIABLE_LENGTH, 10374664626SKris Kennaway rc4_init_key, 10474664626SKris Kennaway rc4_cipher, 105ddd58736SKris Kennaway NULL, 1065c87c606SMark Murray sizeof(EVP_RC4_KEY), 107ddd58736SKris Kennaway NULL, 108ddd58736SKris Kennaway NULL, 1093b4e3dcbSSimon L. B. Nielsen NULL, 110ddd58736SKris Kennaway NULL 11174664626SKris Kennaway }; 11274664626SKris Kennaway 1135c87c606SMark Murray const EVP_CIPHER *EVP_rc4(void) 11474664626SKris Kennaway { 11574664626SKris Kennaway return(&r4_cipher); 11674664626SKris Kennaway } 11774664626SKris Kennaway 1185c87c606SMark Murray const EVP_CIPHER *EVP_rc4_40(void) 11974664626SKris Kennaway { 12074664626SKris Kennaway return(&r4_40_cipher); 12174664626SKris Kennaway } 12274664626SKris Kennaway 123ddd58736SKris Kennaway static int rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 124ddd58736SKris Kennaway const unsigned char *iv, int enc) 12574664626SKris Kennaway { 1265c87c606SMark Murray RC4_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx), 1275c87c606SMark Murray key); 128ddd58736SKris Kennaway return 1; 12974664626SKris Kennaway } 13074664626SKris Kennaway 131ddd58736SKris Kennaway static int rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 1321f13597dSJung-uk Kim const unsigned char *in, size_t inl) 13374664626SKris Kennaway { 1345c87c606SMark Murray RC4(&data(ctx)->ks,inl,in,out); 135ddd58736SKris Kennaway return 1; 13674664626SKris Kennaway } 13774664626SKris Kennaway #endif 138