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