1 /* crypto/rc4/rc4.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 <openssl/rc4.h> 63 #include <openssl/evp.h> 64 65 char *usage[]={ 66 "usage: rc4 args\n", 67 "\n", 68 " -in arg - input file - default stdin\n", 69 " -out arg - output file - default stdout\n", 70 " -key key - password\n", 71 NULL 72 }; 73 74 int main(int argc, char *argv[]) 75 { 76 FILE *in=NULL,*out=NULL; 77 char *infile=NULL,*outfile=NULL,*keystr=NULL; 78 RC4_KEY key; 79 char buf[BUFSIZ]; 80 int badops=0,i; 81 char **pp; 82 unsigned char md[MD5_DIGEST_LENGTH]; 83 84 argc--; 85 argv++; 86 while (argc >= 1) 87 { 88 if (strcmp(*argv,"-in") == 0) 89 { 90 if (--argc < 1) goto bad; 91 infile= *(++argv); 92 } 93 else if (strcmp(*argv,"-out") == 0) 94 { 95 if (--argc < 1) goto bad; 96 outfile= *(++argv); 97 } 98 else if (strcmp(*argv,"-key") == 0) 99 { 100 if (--argc < 1) goto bad; 101 keystr= *(++argv); 102 } 103 else 104 { 105 fprintf(stderr,"unknown option %s\n",*argv); 106 badops=1; 107 break; 108 } 109 argc--; 110 argv++; 111 } 112 113 if (badops) 114 { 115 bad: 116 for (pp=usage; (*pp != NULL); pp++) 117 fprintf(stderr,"%s",*pp); 118 exit(1); 119 } 120 121 if (infile == NULL) 122 in=stdin; 123 else 124 { 125 in=fopen(infile,"r"); 126 if (in == NULL) 127 { 128 perror("open"); 129 exit(1); 130 } 131 132 } 133 if (outfile == NULL) 134 out=stdout; 135 else 136 { 137 out=fopen(outfile,"w"); 138 if (out == NULL) 139 { 140 perror("open"); 141 exit(1); 142 } 143 } 144 145 #ifdef OPENSSL_SYS_MSDOS 146 /* This should set the file to binary mode. */ 147 { 148 #include <fcntl.h> 149 setmode(fileno(in),O_BINARY); 150 setmode(fileno(out),O_BINARY); 151 } 152 #endif 153 154 if (keystr == NULL) 155 { /* get key */ 156 i=EVP_read_pw_string(buf,BUFSIZ,"Enter RC4 password:",0); 157 if (i != 0) 158 { 159 OPENSSL_cleanse(buf,BUFSIZ); 160 fprintf(stderr,"bad password read\n"); 161 exit(1); 162 } 163 keystr=buf; 164 } 165 166 EVP_Digest((unsigned char *)keystr,strlen(keystr),md,NULL,EVP_md5(),NULL); 167 OPENSSL_cleanse(keystr,strlen(keystr)); 168 RC4_set_key(&key,MD5_DIGEST_LENGTH,md); 169 170 for(;;) 171 { 172 i=fread(buf,1,BUFSIZ,in); 173 if (i == 0) break; 174 if (i < 0) 175 { 176 perror("read"); 177 exit(1); 178 } 179 RC4(&key,(unsigned int)i,(unsigned char *)buf, 180 (unsigned char *)buf); 181 i=fwrite(buf,(unsigned int)i,1,out); 182 if (i != 1) 183 { 184 perror("write"); 185 exit(1); 186 } 187 } 188 fclose(out); 189 fclose(in); 190 exit(0); 191 return(1); 192 } 193 194
