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  1. /*
  2.   Copyright (c) 1990-2007 Info-ZIP.  All rights reserved.
  3.  
  4.   See the accompanying file LICENSE, version 2005-Feb-10 or later
  5.   (the contents of which are also included in (un)zip.h) for terms of use.
  6.   If, for some reason, all these files are missing, the Info-ZIP license
  7.   also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
  8. */
  9. /*
  10.   crypt.h (full version) by Info-ZIP.   Last revised:  [see CR_VERSION_DATE]
  11.  
  12.   The main encryption/decryption source code for Info-Zip software was
  13.   originally written in Europe.  To the best of our knowledge, it can
  14.   be freely distributed in both source and object forms from any country,
  15.   including the USA under License Exception TSU of the U.S. Export
  16.   Administration Regulations (section 740.13(e)) of 6 June 2002.
  17.  
  18.   NOTE on copyright history:
  19.   Previous versions of this source package (up to version 2.8) were
  20.   not copyrighted and put in the public domain.  If you cannot comply
  21.   with the Info-Zip LICENSE, you may want to look for one of those
  22.   public domain versions.
  23.  */
  24.  
  25. #ifndef __crypt_h   /* don't include more than once */
  26. #define __crypt_h
  27.  
  28. #ifdef CRYPT
  29. #  undef CRYPT
  30. #endif
  31. /*
  32.    Logic of selecting "full crypt" code:
  33.    a) default behaviour:
  34.       - dummy crypt code when compiling UnZipSFX stub, to minimize size
  35.       - full crypt code when used to compile Zip, UnZip and fUnZip
  36.    b) USE_CRYPT defined:
  37.       - always full crypt code
  38.    c) NO_CRYPT defined:
  39.       - never full crypt code
  40.    NO_CRYPT takes precedence over USE_CRYPT
  41.  */
  42. #if defined(NO_CRYPT)
  43. #  define CRYPT  0  /* dummy version */
  44. #else
  45. #if defined(USE_CRYPT)
  46. #  define CRYPT  1  /* full version */
  47. #else
  48. #if !defined(SFX)
  49. #  define CRYPT  1  /* full version for zip and main unzip */
  50. #else
  51. #  define CRYPT  0  /* dummy version for unzip sfx */
  52. #endif
  53. #endif /* ?USE_CRYPT */
  54. #endif /* ?NO_CRYPT */
  55.  
  56. #if CRYPT
  57. /* full version */
  58.  
  59. #ifdef CR_BETA
  60. #  undef CR_BETA    /* this is not a beta release */
  61. #endif
  62.  
  63. #define CR_MAJORVER        2
  64. #define CR_MINORVER        11
  65. #ifdef CR_BETA
  66. #  define CR_BETA_VER      "c BETA"
  67. #  define CR_VERSION_DATE  "05 Jan 2007"       /* last real code change */
  68. #else
  69. #  define CR_BETA_VER      ""
  70. #  define CR_VERSION_DATE  "05 Jan 2007"       /* last public release date */
  71. #  define CR_RELEASE
  72. #endif
  73.  
  74. #ifndef __G         /* UnZip only, for now (DLL stuff) */
  75. #  define __G
  76. #  define __G__
  77. #  define __GDEF
  78. #  define __GPRO    void
  79. #  define __GPRO__
  80. #endif
  81.  
  82. #if defined(MSDOS) || defined(OS2) || defined(WIN32)
  83. #  ifndef DOS_OS2_W32
  84. #    define DOS_OS2_W32
  85. #  endif
  86. #endif
  87.  
  88. #if defined(DOS_OS2_W32) || defined(__human68k__)
  89. #  ifndef DOS_H68_OS2_W32
  90. #    define DOS_H68_OS2_W32
  91. #  endif
  92. #endif
  93.  
  94. #if defined(VM_CMS) || defined(MVS)
  95. #  ifndef CMS_MVS
  96. #    define CMS_MVS
  97. #  endif
  98. #endif
  99.  
  100. /* To allow combining of Zip and UnZip static libraries in a single binary,
  101.  * the Zip and UnZip versions of the crypt core functions have to be named
  102.  * differently.
  103.  */
  104. #ifdef ZIP
  105. #  ifdef REALLY_SHORT_SYMS
  106. #    define decrypt_byte   zdcrby
  107. #  else
  108. #    define decrypt_byte   zp_decrypt_byte
  109. #  endif
  110. #  define  update_keys     zp_update_keys
  111. #  define  init_keys       zp_init_keys
  112. #else /* !ZIP */
  113. #  ifdef REALLY_SHORT_SYMS
  114. #    define decrypt_byte   dcrbyt
  115. #  endif
  116. #endif /* ?ZIP */
  117.  
  118. #define IZ_PWLEN  80    /* input buffer size for reading encryption key */
  119. #ifndef PWLEN           /* for compatibility with previous zcrypt release... */
  120. #  define PWLEN IZ_PWLEN
  121. #endif
  122. #define RAND_HEAD_LEN  12       /* length of encryption random header */
  123.  
  124. /* the crc_32_tab array has to be provided externally for the crypt calculus */
  125.  
  126. /* encode byte c, using temp t.  Warning: c must not have side effects. */
  127. #define zencode(c,t)  (t=decrypt_byte(__G), update_keys(c), t^(c))
  128.  
  129. /* decode byte c in place */
  130. #define zdecode(c)   update_keys(__G__ c ^= decrypt_byte(__G))
  131.  
  132. int  decrypt_byte OF((__GPRO));
  133. int  update_keys OF((__GPRO__ int c));
  134. void init_keys OF((__GPRO__ ZCONST char *passwd));
  135.  
  136. #ifdef ZIP
  137.    void crypthead OF((ZCONST char *, ulg, FILE *));
  138. #  ifdef UTIL
  139.      int zipcloak OF((struct zlist far *, FILE *, FILE *, ZCONST char *));
  140.      int zipbare OF((struct zlist far *, FILE *, FILE *, ZCONST char *));
  141. #  else
  142.      unsigned zfwrite OF((zvoid *, extent, extent, FILE *));
  143.      extern char *key;
  144. #  endif
  145. #endif /* ZIP */
  146.  
  147. #if (defined(UNZIP) && !defined(FUNZIP))
  148.    int  decrypt OF((__GPRO__ ZCONST char *passwrd));
  149. #endif
  150.  
  151. #ifdef FUNZIP
  152.    extern int encrypted;
  153. #  ifdef NEXTBYTE
  154. #    undef NEXTBYTE
  155. #  endif
  156. #  define NEXTBYTE \
  157.    (encrypted? update_keys(__G__ getc(G.in)^decrypt_byte(__G)) : getc(G.in))
  158. #endif /* FUNZIP */
  159.  
  160. #else /* !CRYPT */
  161. /* dummy version */
  162.  
  163. #define zencode
  164. #define zdecode
  165.  
  166. #define zfwrite  fwrite
  167.  
  168. #endif /* ?CRYPT */
  169. #endif /* !__crypt_h */
  170.