Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 <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 | |