rc4.c 5.3 KB

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  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. #include <stdio.h>
  59. #include <stdlib.h>
  60. #include <string.h>
  61. #include <openssl/rc4.h>
  62. char *usage[]={
  63. "usage: rc4 args\n",
  64. "\n",
  65. " -in arg - input file - default stdin\n",
  66. " -out arg - output file - default stdout\n",
  67. " -key key - password\n",
  68. NULL
  69. };
  70. int main(int argc, char *argv[])
  71. {
  72. FILE *in=NULL,*out=NULL;
  73. char *infile=NULL,*outfile=NULL,*keystr=NULL;
  74. RC4_KEY key;
  75. char buf[BUFSIZ];
  76. int badops=0,i;
  77. char **pp;
  78. unsigned char md[MD5_DIGEST_LENGTH];
  79. argc--;
  80. argv++;
  81. while (argc >= 1)
  82. {
  83. if (strcmp(*argv,"-in") == 0)
  84. {
  85. if (--argc < 1) goto bad;
  86. infile= *(++argv);
  87. }
  88. else if (strcmp(*argv,"-out") == 0)
  89. {
  90. if (--argc < 1) goto bad;
  91. outfile= *(++argv);
  92. }
  93. else if (strcmp(*argv,"-key") == 0)
  94. {
  95. if (--argc < 1) goto bad;
  96. keystr= *(++argv);
  97. }
  98. else
  99. {
  100. fprintf(stderr,"unknown option %s\n",*argv);
  101. badops=1;
  102. break;
  103. }
  104. argc--;
  105. argv++;
  106. }
  107. if (badops)
  108. {
  109. bad:
  110. for (pp=usage; (*pp != NULL); pp++)
  111. fprintf(stderr,"%s",*pp);
  112. exit(1);
  113. }
  114. if (infile == NULL)
  115. in=stdin;
  116. else
  117. {
  118. in=fopen(infile,"r");
  119. if (in == NULL)
  120. {
  121. perror("open");
  122. exit(1);
  123. }
  124. }
  125. if (outfile == NULL)
  126. out=stdout;
  127. else
  128. {
  129. out=fopen(outfile,"w");
  130. if (out == NULL)
  131. {
  132. perror("open");
  133. exit(1);
  134. }
  135. }
  136. #ifdef OPENSSL_SYS_MSDOS
  137. /* This should set the file to binary mode. */
  138. {
  139. #include <fcntl.h>
  140. setmode(fileno(in),O_BINARY);
  141. setmode(fileno(out),O_BINARY);
  142. }
  143. #endif
  144. if (keystr == NULL)
  145. { /* get key */
  146. i=EVP_read_pw_string(buf,BUFSIZ,"Enter RC4 password:",0);
  147. if (i != 0)
  148. {
  149. OPENSSL_cleanse(buf,BUFSIZ);
  150. fprintf(stderr,"bad password read\n");
  151. exit(1);
  152. }
  153. keystr=buf;
  154. }
  155. EVP_Digest((unsigned char *)keystr,(unsigned long)strlen(keystr),md,NULL,EVP_md5());
  156. OPENSSL_cleanse(keystr,strlen(keystr));
  157. RC4_set_key(&key,MD5_DIGEST_LENGTH,md);
  158. for(;;)
  159. {
  160. i=fread(buf,1,BUFSIZ,in);
  161. if (i == 0) break;
  162. if (i < 0)
  163. {
  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. {
  172. perror("write");
  173. exit(1);
  174. }
  175. }
  176. fclose(out);
  177. fclose(in);
  178. exit(0);
  179. return(1);
  180. }