release/src/router/openssl/crypto/rc4/rc4.c

   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
  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