155714Skris/* crypto/rc4/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. 8280304Sjkim * 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). 15280304Sjkim * 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. 22280304Sjkim * 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 :-). 37280304Sjkim * 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)" 40280304Sjkim * 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. 52280304Sjkim * 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 <stdlib.h> 6155714Skris#include <string.h> 6255714Skris#include <openssl/rc4.h> 63160814Ssimon#include <openssl/evp.h> 6455714Skris 65280304Sjkimchar *usage[] = { 66280304Sjkim "usage: rc4 args\n", 67280304Sjkim "\n", 68280304Sjkim " -in arg - input file - default stdin\n", 69280304Sjkim " -out arg - output file - default stdout\n", 70280304Sjkim " -key key - password\n", 71280304Sjkim NULL 7255714Skris}; 7355714Skris 7455714Skrisint main(int argc, char *argv[]) 75280304Sjkim{ 76280304Sjkim FILE *in = NULL, *out = NULL; 77280304Sjkim char *infile = NULL, *outfile = NULL, *keystr = NULL; 78280304Sjkim RC4_KEY key; 79280304Sjkim char buf[BUFSIZ]; 80280304Sjkim int badops = 0, i; 81280304Sjkim char **pp; 82280304Sjkim unsigned char md[MD5_DIGEST_LENGTH]; 8355714Skris 84280304Sjkim argc--; 85280304Sjkim argv++; 86280304Sjkim while (argc >= 1) { 87280304Sjkim if (strcmp(*argv, "-in") == 0) { 88280304Sjkim if (--argc < 1) 89280304Sjkim goto bad; 90280304Sjkim infile = *(++argv); 91280304Sjkim } else if (strcmp(*argv, "-out") == 0) { 92280304Sjkim if (--argc < 1) 93280304Sjkim goto bad; 94280304Sjkim outfile = *(++argv); 95280304Sjkim } else if (strcmp(*argv, "-key") == 0) { 96280304Sjkim if (--argc < 1) 97280304Sjkim goto bad; 98280304Sjkim keystr = *(++argv); 99280304Sjkim } else { 100280304Sjkim fprintf(stderr, "unknown option %s\n", *argv); 101280304Sjkim badops = 1; 102280304Sjkim break; 103280304Sjkim } 104280304Sjkim argc--; 105280304Sjkim argv++; 106280304Sjkim } 10755714Skris 108280304Sjkim if (badops) { 109280304Sjkim bad: 110280304Sjkim for (pp = usage; (*pp != NULL); pp++) 111280304Sjkim fprintf(stderr, "%s", *pp); 112280304Sjkim exit(1); 113280304Sjkim } 11455714Skris 115280304Sjkim if (infile == NULL) 116280304Sjkim in = stdin; 117280304Sjkim else { 118280304Sjkim in = fopen(infile, "r"); 119280304Sjkim if (in == NULL) { 120280304Sjkim perror("open"); 121280304Sjkim exit(1); 122280304Sjkim } 12355714Skris 124280304Sjkim } 125280304Sjkim if (outfile == NULL) 126280304Sjkim out = stdout; 127280304Sjkim else { 128280304Sjkim out = fopen(outfile, "w"); 129280304Sjkim if (out == NULL) { 130280304Sjkim perror("open"); 131280304Sjkim exit(1); 132280304Sjkim } 133280304Sjkim } 134280304Sjkim 135109998Smarkm#ifdef OPENSSL_SYS_MSDOS 136280304Sjkim /* This should set the file to binary mode. */ 137280304Sjkim { 138280304Sjkim# include <fcntl.h> 139280304Sjkim setmode(fileno(in), O_BINARY); 140280304Sjkim setmode(fileno(out), O_BINARY); 141280304Sjkim } 14255714Skris#endif 14355714Skris 144280304Sjkim if (keystr == NULL) { /* get key */ 145280304Sjkim i = EVP_read_pw_string(buf, BUFSIZ, "Enter RC4 password:", 0); 146280304Sjkim if (i != 0) { 147280304Sjkim OPENSSL_cleanse(buf, BUFSIZ); 148280304Sjkim fprintf(stderr, "bad password read\n"); 149280304Sjkim exit(1); 150280304Sjkim } 151280304Sjkim keystr = buf; 152280304Sjkim } 15355714Skris 154280304Sjkim EVP_Digest((unsigned char *)keystr, strlen(keystr), md, NULL, EVP_md5(), 155280304Sjkim NULL); 156280304Sjkim OPENSSL_cleanse(keystr, strlen(keystr)); 157280304Sjkim RC4_set_key(&key, MD5_DIGEST_LENGTH, md); 15855714Skris 159280304Sjkim for (;;) { 160280304Sjkim i = fread(buf, 1, BUFSIZ, in); 161280304Sjkim if (i == 0) 162280304Sjkim break; 163280304Sjkim if (i < 0) { 164280304Sjkim perror("read"); 165280304Sjkim exit(1); 166280304Sjkim } 167280304Sjkim RC4(&key, (unsigned int)i, (unsigned char *)buf, 168280304Sjkim (unsigned char *)buf); 169280304Sjkim i = fwrite(buf, (unsigned int)i, 1, out); 170280304Sjkim if (i != 1) { 171280304Sjkim perror("write"); 172280304Sjkim exit(1); 173280304Sjkim } 174280304Sjkim } 175280304Sjkim fclose(out); 176280304Sjkim fclose(in); 177280304Sjkim exit(0); 178280304Sjkim return (1); 179280304Sjkim} 180