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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
64char *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",
70NULL
71};
72
73int main(argc, argv)
74int argc;
75char *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 {
116bad:
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
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