1 /* crypto/rc4/rc4.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include "rc4.h" 63 64 char *usage[]={ 65 "usage: rc4 args\n", 66 "\n", 67 " -in arg - input file - default stdin\n", 68 " -out arg - output file - default stdout\n", 69 " -key key - password\n", 70 NULL 71 }; 72 73 int main(argc, argv) 74 int argc; 75 char *argv[]; 76 { 77 FILE *in=NULL,*out=NULL; 78 char *infile=NULL,*outfile=NULL,*keystr=NULL; 79 RC4_KEY key; 80 char buf[BUFSIZ]; 81 int badops=0,i; 82 char **pp; 83 unsigned char md[MD5_DIGEST_LENGTH]; 84 85 argc--; 86 argv++; 87 while (argc >= 1) 88 { 89 if (strcmp(*argv,"-in") == 0) 90 { 91 if (--argc < 1) goto bad; 92 infile= *(++argv); 93 } 94 else if (strcmp(*argv,"-out") == 0) 95 { 96 if (--argc < 1) goto bad; 97 outfile= *(++argv); 98 } 99 else if (strcmp(*argv,"-key") == 0) 100 { 101 if (--argc < 1) goto bad; 102 keystr= *(++argv); 103 } 104 else 105 { 106 fprintf(stderr,"unknown option %s\n",*argv); 107 badops=1; 108 break; 109 } 110 argc--; 111 argv++; 112 } 113 114 if (badops) 115 { 116 bad: 117 for (pp=usage; (*pp != NULL); pp++) 118 fprintf(stderr,*pp); 119 exit(1); 120 } 121 122 if (infile == NULL) 123 in=stdin; 124 else 125 { 126 in=fopen(infile,"r"); 127 if (in == NULL) 128 { 129 perror("open"); 130 exit(1); 131 } 132 133 } 134 if (outfile == NULL) 135 out=stdout; 136 else 137 { 138 out=fopen(outfile,"w"); 139 if (out == NULL) 140 { 141 perror("open"); 142 exit(1); 143 } 144 } 145 146 #ifdef MSDOS 147 /* This should set the file to binary mode. */ 148 { 149 #include <fcntl.h> 150 setmode(fileno(in),O_BINARY); 151 setmode(fileno(out),O_BINARY); 152 } 153 #endif 154 155 if (keystr == NULL) 156 { /* get key */ 157 i=EVP_read_pw_string(buf,BUFSIZ,"Enter RC4 password:",0); 158 if (i != 0) 159 { 160 memset(buf,0,BUFSIZ); 161 fprintf(stderr,"bad password read\n"); 162 exit(1); 163 } 164 keystr=buf; 165 } 166 167 MD5((unsigned char *)keystr,(unsigned long)strlen(keystr),md); 168 memset(keystr,0,strlen(keystr)); 169 RC4_set_key(&key,MD5_DIGEST_LENGTH,md); 170 171 for(;;) 172 { 173 i=fread(buf,1,BUFSIZ,in); 174 if (i == 0) break; 175 if (i < 0) 176 { 177 perror("read"); 178 exit(1); 179 } 180 RC4(&key,(unsigned int)i,(unsigned char *)buf, 181 (unsigned char *)buf); 182 i=fwrite(buf,(unsigned int)i,1,out); 183 if (i != 1) 184 { 185 perror("write"); 186 exit(1); 187 } 188 } 189 fclose(out); 190 fclose(in); 191 exit(0); 192 return(1); 193 } 194 195