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 if (strcmp(*argv, "-in") == 0) {
88 if (--argc < 1)
89 goto bad;
90 infile = *(++argv);
91 } else if (strcmp(*argv, "-out") == 0) {
92 if (--argc < 1)
93 goto bad;
94 outfile = *(++argv);
95 } else if (strcmp(*argv, "-key") == 0) {
96 if (--argc < 1)
97 goto bad;
98 keystr = *(++argv);
99 } else {
100 fprintf(stderr, "unknown option %s\n", *argv);
101 badops = 1;
102 break;
103 }
104 argc--;
105 argv++;
106 }
107
108 if (badops) {
109 bad:
110 for (pp = usage; (*pp != NULL); pp++)
111 fprintf(stderr, "%s", *pp);
112 exit(1);
113 }
114
115 if (infile == NULL)
116 in = stdin;
117 else {
118 in = fopen(infile, "r");
119 if (in == NULL) {
120 perror("open");
121 exit(1);
122 }
123
124 }
125 if (outfile == NULL)
126 out = stdout;
127 else {
128 out = fopen(outfile, "w");
129 if (out == NULL) {
130 perror("open");
131 exit(1);
132 }
133 }
134
135 #ifdef OPENSSL_SYS_MSDOS
136 /* This should set the file to binary mode. */
137 {
138 # include <fcntl.h>
139 setmode(fileno(in), O_BINARY);
140 setmode(fileno(out), O_BINARY);
141 }
142 #endif
143
144 if (keystr == NULL) { /* get key */
145 i = EVP_read_pw_string(buf, BUFSIZ, "Enter RC4 password:", 0);
146 if (i != 0) {
147 OPENSSL_cleanse(buf, BUFSIZ);
148 fprintf(stderr, "bad password read\n");
149 exit(1);
150 }
151 keystr = buf;
152 }
153
154 EVP_Digest((unsigned char *)keystr, strlen(keystr), md, NULL, EVP_md5(),
155 NULL);
156 OPENSSL_cleanse(keystr, strlen(keystr));
157 RC4_set_key(&key, MD5_DIGEST_LENGTH, md);
158
159 for (;;) {
160 i = fread(buf, 1, BUFSIZ, in);
161 if (i == 0)
162 break;
163 if (i < 0) {
164 perror("read");
165 exit(1);
166 }
167 RC4(&key, (unsigned int)i, (unsigned char *)buf,
168 (unsigned char *)buf);
169 i = fwrite(buf, (unsigned int)i, 1, out);
170 if (i != 1) {
171 perror("write");
172 exit(1);
173 }
174 }
175 fclose(out);
176 fclose(in);
177 exit(0);
178 return (1);
179 }
180