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
65char *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",
71NULL
72};
73
74int 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		{
115bad:
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