crypt.c File Reference

#include "zip.h"
#include "crypt.h"
#include "ttyio.h"
#include "crc32.h"

Macros
#define	ZCRYPT_INTERNAL
#define	GLOBAL(g)
#define	CRY_CRC_TAB   CRC_32_TAB

Functions
local int testp	OF ((__GPRO__ ZCONST uch *h))
local int testkey	OF ((__GPRO__ ZCONST uch *h, ZCONST char *key))
int	decrypt_byte (__G)
int	update_keys (__G__ c) __GDEF int c
	GLOBAL (keys[1]) = 591751049L
	GLOBAL (keys[2]) = 878082192L
void	init_keys (__G__ passwd) __GDEF ZCONST char *passwd
int	decrypt (__G__ passwrd) __GDEF ZCONST char *passwrd
	Trace ((stdout, "\n[incnt = %d]: ", GLOBAL(incnt)))
	GLOBAL (pInfo->encrypted) = TRUE
	defer_leftover_input (__G)
	for (n=0;n< RAND_HEAD_LEN;n++)
	undefer_input (__G)
	if (GLOBAL(newzip))
	if (GLOBAL(key))
else	if ((GLOBAL(key)=(char *) malloc(IZ_PWLEN+1))==(char *) NULL)
	while (n > 0)
local int	testp (__G__ h) __GDEF ZCONST uch *h
	if (r !=0)
local int	testkey (__G__ h, key) __GDEF ZCONST uch *h
	memcpy (hh, h, RAND_HEAD_LEN)
	Trace ((stdout, "\n lrec.crc= %08lx crec.crc= %08lx pInfo->ExtLocHdr= %s\n", GLOBAL(lrec.crc32), GLOBAL(pInfo->crc), GLOBAL(pInfo->ExtLocHdr) ? "true":"false"))
	Trace ((stdout, " incnt = %d unzip offset into zipfile = %ld\n", GLOBAL(incnt), GLOBAL(cur_zipfile_bufstart)+(GLOBAL(inptr) -GLOBAL(inbuf))))
	Trace ((stdout, " b = %02x (crc >> 24) = %02x (lrec.time >> 8) = %02x\n", b,(ush)(GLOBAL(lrec.crc32) > > 24),((ush) GLOBAL(lrec.last_mod_dos_datetime) > > 8) &0xff))

Variables
return	c
while	passwd
int	n
int	r = testkey(__G__ h, GLOBAL(key))
uch	h [RAND_HEAD_LEN]
return	PK_WARN
char *	key_translated
ZCONST char *	key
uch *	p
uch	hh [RAND_HEAD_LEN]
	b = hh[RAND_HEAD_LEN-1]

Macro Definition Documentation

CRY_CRC_TAB

#define CRY_CRC_TAB   CRC_32_TAB

GLOBAL

#define GLOBAL

(

g

)

Value:

G.g

ZCRYPT_INTERNAL

#define ZCRYPT_INTERNAL

Function Documentation

decrypt()

int decrypt

(

__G__

passwrd

)

decrypt_byte()

int decrypt_byte

(

__G

)

defer_leftover_input()

defer_leftover_input

(

__G

)

for()

for

(

)

GLOBAL() [1/3]

GLOBAL

(

keys

[1]

)

= 591751049L

GLOBAL() [2/3]

GLOBAL

(

keys

[2]

)

= 878082192L

GLOBAL() [3/3]

GLOBAL

(

pInfo->

encrypted

)

= TRUE

if() [1/4]

else if

(

(GLOBAL(key)=(char *) malloc(IZ_PWLEN+1))

= = (char *)NULL

)

if() [2/4]

if

(

GLOBAL(key)

)

if() [3/4]

if

(

GLOBAL(newzip)

)

if() [4/4]

if

(

r !

= 0

)

init_keys()

init_keys

(

__G__

passwd

)

memcpy()

memcpy	(	hh	,
		h	,
		RAND_HEAD_LEN	)

OF() [1/2]

local int testp OF

(

(__GPRO__ ZCONST uch *h)

)

OF() [2/2]

local int testkey OF

(

(__GPRO__ ZCONST uch *h, ZCONST char *key)

)

testkey()

local int testkey	(	__G__	h,
		key	)

testp()

local int testp

(

__G__

h

)

Trace() [1/4]

Trace

(

(stdout, " b = %02x (crc >> 24) = %02x (lrec.time >> 8) = %02x\n", b,(ush)(GLOBAL(lrec.crc32) > > 24),((ush) GLOBAL(lrec.last_mod_dos_datetime) > > 8) &0xff)

)

Trace() [2/4]

Trace

(

(stdout, " incnt = %d unzip offset into zipfile = %ld\n", GLOBAL(incnt), GLOBAL(cur_zipfile_bufstart)+(GLOBAL(inptr) -GLOBAL(inbuf)))

)

Trace() [3/4]

Trace

(

(stdout, "\n lrec.crc= %08lx crec.crc= %08lx pInfo->ExtLocHdr= %s\n", GLOBAL(lrec.crc32), GLOBAL(pInfo->crc), GLOBAL(pInfo->ExtLocHdr) ? "true":"false")

)

Trace() [4/4]

Trace

(

(stdout, "\n[incnt = %d]: ", GLOBAL(incnt))

)

undefer_input()

undefer_input

(

__G

)

update_keys()

int update_keys

(

__G__

c

)

while()

while	(	n	,
		0	)

Variable Documentation

b

long b = hh[RAND_HEAD_LEN-1]

c

return c

h

uch h[RAND_HEAD_LEN]

hh

else hh

key

ZCONST char* key

key_translated

char* key_translated

Initial value:

{
    int r

n

unsigned n

Initial value:

{
    ush b

p

uch* p

passwd

passwd

Initial value:

{
        update_keys(__G__ (int)*passwd)

PK_WARN

return PK_WARN

r

int r = testkey(__G__ h, GLOBAL(key))