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2017-02-25 23:55:24 +01:00
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openssl-1.0.2f/crypto/rc4/rc4.c Normal file
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/* crypto/rc4/rc4.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/rc4.h>
#include <openssl/evp.h>
char *usage[] = {
"usage: rc4 args\n",
"\n",
" -in arg - input file - default stdin\n",
" -out arg - output file - default stdout\n",
" -key key - password\n",
NULL
};
int main(int argc, char *argv[])
{
FILE *in = NULL, *out = NULL;
char *infile = NULL, *outfile = NULL, *keystr = NULL;
RC4_KEY key;
char buf[BUFSIZ];
int badops = 0, i;
char **pp;
unsigned char md[MD5_DIGEST_LENGTH];
argc--;
argv++;
while (argc >= 1) {
if (strcmp(*argv, "-in") == 0) {
if (--argc < 1)
goto bad;
infile = *(++argv);
} else if (strcmp(*argv, "-out") == 0) {
if (--argc < 1)
goto bad;
outfile = *(++argv);
} else if (strcmp(*argv, "-key") == 0) {
if (--argc < 1)
goto bad;
keystr = *(++argv);
} else {
fprintf(stderr, "unknown option %s\n", *argv);
badops = 1;
break;
}
argc--;
argv++;
}
if (badops) {
bad:
for (pp = usage; (*pp != NULL); pp++)
fprintf(stderr, "%s", *pp);
exit(1);
}
if (infile == NULL)
in = stdin;
else {
in = fopen(infile, "r");
if (in == NULL) {
perror("open");
exit(1);
}
}
if (outfile == NULL)
out = stdout;
else {
out = fopen(outfile, "w");
if (out == NULL) {
perror("open");
exit(1);
}
}
#ifdef OPENSSL_SYS_MSDOS
/* This should set the file to binary mode. */
{
# include <fcntl.h>
setmode(fileno(in), O_BINARY);
setmode(fileno(out), O_BINARY);
}
#endif
if (keystr == NULL) { /* get key */
i = EVP_read_pw_string(buf, BUFSIZ, "Enter RC4 password:", 0);
if (i != 0) {
OPENSSL_cleanse(buf, BUFSIZ);
fprintf(stderr, "bad password read\n");
exit(1);
}
keystr = buf;
}
EVP_Digest((unsigned char *)keystr, strlen(keystr), md, NULL, EVP_md5(),
NULL);
OPENSSL_cleanse(keystr, strlen(keystr));
RC4_set_key(&key, MD5_DIGEST_LENGTH, md);
for (;;) {
i = fread(buf, 1, BUFSIZ, in);
if (i == 0)
break;
if (i < 0) {
perror("read");
exit(1);
}
RC4(&key, (unsigned int)i, (unsigned char *)buf,
(unsigned char *)buf);
i = fwrite(buf, (unsigned int)i, 1, out);
if (i != 1) {
perror("write");
exit(1);
}
}
fclose(out);
fclose(in);
exit(0);
return (1);
}