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d02b48c6 | 1 | /* crypto/rc4/rc4.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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 | ||
64 | char *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", | |
70 | NULL | |
71 | }; | |
72 | ||
73 | int main(argc, argv) | |
74 | int argc; | |
75 | char *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 | { | |
116 | bad: | |
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 |