100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
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/*
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crypt.h (full version) by Info-ZIP. Last revised: [see CR_VERSION_DATE]
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This header file is not copyrighted, and non-beta versions may be
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distributed without restriction.
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*/
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#ifndef __crypt_h /* don't include more than once */
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#define __crypt_h
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#ifdef CRYPT
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# undef CRYPT
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#endif
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#define CRYPT 1 /* full version */
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#define CR_MAJORVER 2
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#define CR_MINORVER 7
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#ifdef CR_BETA
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# define CR_BETA_VER "m BETA"
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# define CR_VERSION_DATE "13 April 1997" /* last real code change */
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#else
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# define CR_BETA_VER ""
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# define CR_VERSION_DATE "22 April 1997" /* last public release date */
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# define CR_RELEASE
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#endif
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#ifndef __G /* UnZip only, for now (DLL stuff) */
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# define __G
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# define __G__
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# define __GDEF
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# define __GPRO void
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# define __GPRO__
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#endif
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#if defined(MSDOS) || defined(OS2) || defined(WIN32)
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# ifndef DOS_OS2_W32
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# define DOS_OS2_W32
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# endif
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#endif
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#if defined(DOS_OS2_W32) || defined(__human68k__)
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# ifndef DOS_H68_OS2_W32
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# define DOS_H68_OS2_W32
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# endif
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#endif
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#if defined(VM_CMS) || defined(MVS)
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# ifndef CMS_MVS
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# define CMS_MVS
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# endif
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#endif
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#ifdef REALLY_SHORT_SYMS
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# define decrypt_byte dcrbyt
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#endif
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#define PWLEN 80 /* input buffer size for reading encryption key */
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#define RAND_HEAD_LEN 12 /* length of encryption random header */
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/* the crc_32_tab array has to be provided externally for the crypt calculus */
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#ifndef UNZIP /* UnZip provides this in globals.h */
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extern ulg near *crc_32_tab;
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#endif /* !UNZIP */
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/* encode byte c, using temp t. Warning: c must not have side effects. */
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#define zencode(c,t) (t=decrypt_byte(__G), update_keys(c), t^(c))
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/* decode byte c in place */
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#define zdecode(c) update_keys(__G__ c ^= decrypt_byte(__G))
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int decrypt_byte OF((__GPRO));
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int update_keys OF((__GPRO__ int c));
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void init_keys OF((__GPRO__ char *passwd));
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#ifdef ZIP
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void crypthead OF((char *, ulg, FILE *));
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# ifdef UTIL
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int zipcloak OF((struct zlist far *, FILE *, FILE *, char *));
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int zipbare OF((__GPRO__ struct zlist far *, FILE *, FILE *, char *));
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# else
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unsigned zfwrite OF((zvoid *, extent, extent, FILE *));
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extern char *key;
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# endif
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#endif /* ZIP */
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#if (defined(UNZIP) && !defined(FUNZIP))
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int decrypt OF((__GPRO));
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#endif
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#ifdef FUNZIP
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extern int encrypted;
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# ifdef NEXTBYTE
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# undef NEXTBYTE
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# endif
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# define NEXTBYTE \
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(encrypted? update_keys(__G__ getc(G.in)^decrypt_byte(__G)) : getc(G.in))
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#endif /* FUNZIP */
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#endif /* !__crypt_h */
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