1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
crypt.h (full version) by Info-ZIP. Last revised: [see CR_VERSION_DATE]
This header file is not copyrighted, and non-beta versions may be
distributed without restriction.
*/
#ifndef __crypt_h /* don't include more than once */
#define __crypt_h
#ifdef CRYPT
# undef CRYPT
#endif
#define CRYPT 1 /* full version */
#ifdef CR_BETA
# undef CR_BETA /* this is not a beta release */
#endif
#define CR_MAJORVER 2
#define CR_MINORVER 8
#ifdef CR_BETA
# define CR_BETA_VER "c BETA"
# define CR_VERSION_DATE "05 July 1998" /* last real code change */
#else
# define CR_BETA_VER ""
# define CR_VERSION_DATE "18 November 1998" /* last public release date */
# define CR_RELEASE
#endif
#ifndef __G /* UnZip only, for now (DLL stuff) */
# define __G
# define __G__
# define __GDEF
# define __GPRO void
# define __GPRO__
#endif
#if defined(MSDOS) || defined(OS2) || defined(WIN32)
# ifndef DOS_OS2_W32
# define DOS_OS2_W32
# endif
#endif
#if defined(DOS_OS2_W32) || defined(__human68k__)
# ifndef DOS_H68_OS2_W32
# define DOS_H68_OS2_W32
# endif
#endif
#if defined(VM_CMS) || defined(MVS)
# ifndef CMS_MVS
# define CMS_MVS
# endif
#endif
/* To allow combining of Zip and UnZip static libraries in a single binary,
* the Zip and UnZip versions of the crypt core functions have to be named
* differently.
*/
#ifdef ZIP
# ifdef REALLY_SHORT_SYMS
# define decrypt_byte zdcrby
# else
# define decrypt_byte zp_decrypt_byte
# endif
# define update_keys zp_update_keys
# define init_keys zp_init_keys
#else /* !ZIP */
# ifdef REALLY_SHORT_SYMS
# define decrypt_byte dcrbyt
# endif
#endif /* ?ZIP */
#define IZ_PWLEN 80 /* input buffer size for reading encryption key */
#ifndef PWLEN /* for compatibility with previous zcrypt release... */
# define PWLEN IZ_PWLEN
#endif
#define RAND_HEAD_LEN 12 /* length of encryption random header */
/* the crc_32_tab array has to be provided externally for the crypt calculus */
#ifndef CRC_32_TAB /* UnZip provides this in globals.h */
# if (!defined(USE_ZLIB) || defined(USE_OWN_CRCTAB))
extern ZCONST ulg near *crc_32_tab;
# else
extern ZCONST ulg Far *crc_32_tab;
# endif
#endif /* !CRC_32_TAB */
/* encode byte c, using temp t. Warning: c must not have side effects. */
#define zencode(c,t) (t=decrypt_byte(__G), update_keys(c), t^(c))
/* decode byte c in place */
#define zdecode(c) update_keys(__G__ c ^= decrypt_byte(__G))
int decrypt_byte OF((__GPRO));
int update_keys OF((__GPRO__ int c));
void init_keys OF((__GPRO__ ZCONST char *passwd));
#ifdef ZIP
void crypthead OF((ZCONST char *, ulg, FILE *));
# ifdef UTIL
int zipcloak OF((struct zlist far *, FILE *, FILE *, ZCONST char *));
int zipbare OF((struct zlist far *, FILE *, FILE *, ZCONST char *));
# else
unsigned zfwrite OF((zvoid *, extent, extent, FILE *));
extern char *key;
# endif
#endif /* ZIP */
#if (defined(UNZIP) && !defined(FUNZIP))
int decrypt OF((__GPRO__ ZCONST char *passwrd));
#endif
#ifdef FUNZIP
extern int encrypted;
# ifdef NEXTBYTE
# undef NEXTBYTE
# endif
# define NEXTBYTE \
(encrypted? update_keys(__G__ getc(G.in)^decrypt_byte(__G)) : getc(G.in))
#endif /* FUNZIP */
#endif /* !__crypt_h */
|
