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
main(int argc,char * argv[])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