unzpriv.h

完整的解压zip文件的源码。包含密码功能

#define FS_FAT_           0    /* filesystem used by MS-DOS, OS/2, Win32 */
#define AMIGA_            1
#define VMS_              2
#define UNIX_             3
#define VM_CMS_           4
#define ATARI_            5    /* what if it's a minix filesystem? [cjh] */
#define FS_HPFS_          6    /* filesystem used by OS/2 (and NT 3.x) */
#define MAC_              7    /* HFS filesystem used by MacOS */
#define Z_SYSTEM_         8
#define CPM_              9
#define TOPS20_           10
#define FS_NTFS_          11   /* filesystem used by Windows NT */
#define QDOS_             12
#define ACORN_            13   /* Archimedes Acorn RISC OS */
#define FS_VFAT_          14   /* filesystem used by Windows 95, NT */
#define MVS_              15
#define BEOS_             16   /* hybrid POSIX/database filesystem */
#define TANDEM_           17   /* Tandem/NSK */
#define NUM_HOSTS         18   /* index of last system + 1 */

#define STORED            0    /* compression methods */
#define SHRUNK            1
#define REDUCED1          2
#define REDUCED2          3
#define REDUCED3          4
#define REDUCED4          5
#define IMPLODED          6
#define TOKENIZED         7
#define DEFLATED          8
#define ENHDEFLATED       9
#define DCLIMPLODED      10
#define NUM_METHODS      11    /* index of last method + 1 */
/* don't forget to update list_files(), extract.c and zipinfo.c appropriately
 * if NUM_METHODS changes */

/* (the PK-class error codes are public and have been moved into unzip.h) */

#define DF_MDY            0    /* date format 10/26/91 (USA only) */
#define DF_DMY            1    /* date format 26/10/91 (most of the world) */
#define DF_YMD            2    /* date format 91/10/26 (a few countries) */

/*---------------------------------------------------------------------------
    Extra-field block ID values and offset info.
  ---------------------------------------------------------------------------*/
/* extra-field ID values, all little-endian: */
#define EF_AV        0x0007    /* PKWARE's authenticity verification */
#define EF_OS2       0x0009    /* OS/2 extended attributes */
#define EF_PKW32     0x000a    /* PKWARE's Win95/98/WinNT filetimes */
#define EF_PKVMS     0x000c    /* PKWARE's VMS */
#define EF_PKUNIX    0x000d    /* PKWARE's Unix */
#define EF_IZVMS     0x4d49    /* Info-ZIP's VMS ("IM") */
#define EF_IZUNIX    0x5855    /* Info-ZIP's old Unix[1] ("UX") */
#define EF_IZUNIX2   0x7855    /* Info-ZIP's new Unix[2] ("Ux") */
#define EF_TIME      0x5455    /* universal timestamp ("UT") */
#define EF_MAC3      0x334d    /* Info-ZIP's new Macintosh (= "M3") */
#define EF_JLMAC     0x07c8    /* Johnny Lee's old Macintosh (= 1992) */
#define EF_ZIPIT     0x2605    /* Thomas Brown's Macintosh (ZipIt) */
#define EF_ZIPIT2    0x2705    /* T. Brown's Mac (ZipIt) v 1.3.8 and newer ? */
#define EF_VMCMS     0x4704    /* Info-ZIP's VM/CMS ("\004G") */
#define EF_MVS       0x470f    /* Info-ZIP's MVS ("\017G") */
#define EF_ACL       0x4c41    /* (OS/2) access control list ("AL") */
#define EF_NTSD      0x4453    /* NT security descriptor ("SD") */
#define EF_BEOS      0x6542    /* BeOS ("Be") */
#define EF_QDOS      0xfb4a    /* SMS/QDOS ("J\373") */
#define EF_AOSVS     0x5356    /* AOS/VS ("VS") */
#define EF_SPARK     0x4341    /* David Pilling's Acorn/SparkFS ("AC") */
#define EF_MD5       0x4b46    /* Fred Kantor's MD5 ("FK") */
#define EF_ASIUNIX   0x756e    /* ASi's Unix ("nu") */

#define EB_HEADSIZE       4    /* length of extra field block header */
#define EB_ID             0    /* offset of block ID in header */
#define EB_LEN            2    /* offset of data length field in header */
#define EB_UCSIZE_P       0    /* offset of ucsize field in compr. data */
#define EB_CMPRHEADLEN    6    /* lenght of compression header */

#define EB_UX_MINLEN      8    /* minimal "UX" field contains atime, mtime */
#define EB_UX_FULLSIZE    12   /* full "UX" field (atime, mtime, uid, gid) */
#define EB_UX_ATIME       0    /* offset of atime in "UX" extra field data */
#define EB_UX_MTIME       4    /* offset of mtime in "UX" extra field data */
#define EB_UX_UID         8    /* byte offset of UID in "UX" field data */
#define EB_UX_GID         10   /* byte offset of GID in "UX" field data */

#define EB_UX2_MINLEN     4    /* minimal "Ux" field contains UID/GID */
#define EB_UX2_UID        0    /* byte offset of UID in "Ux" field data */
#define EB_UX2_GID        2    /* byte offset of GID in "Ux" field data */
#define EB_UX2_VALID      (1 << 8)      /* UID/GID present */

#define EB_UT_MINLEN      1    /* minimal UT field contains Flags byte */
#define EB_UT_FLAGS       0    /* byte offset of Flags field */
#define EB_UT_TIME1       1    /* byte offset of 1st time value */
#define EB_UT_FL_MTIME    (1 << 0)      /* mtime present */
#define EB_UT_FL_ATIME    (1 << 1)      /* atime present */
#define EB_UT_FL_CTIME    (1 << 2)      /* ctime present */

#define EB_FLGS_OFFS      4    /* offset of flags area in generic compressed
                                  extra field blocks (OS2, NT, and others) */
#define EB_OS2_HLEN       4    /* size of OS2/ACL compressed data header */
#define EB_BEOS_HLEN      5    /* length of BeOS e.f attribute header */
#define EB_BE_FL_UNCMPR   0x01 /* "BeOS attributes uncompressed" bit flag */
#define EB_MAC3_HLEN      14   /* length of Mac3 attribute block header */
#define EB_M3_FL_DATFRK   0x01 /* "this entry is data fork" flag */
#define EB_M3_FL_UNCMPR   0x04 /* "Mac3 attributes uncompressed" bit flag */
#define EB_M3_FL_TIME64   0x08 /* "Mac3 time fields are 64 bit wide" flag */
#define EB_M3_FL_NOUTC    0x10 /* "Mac3 timezone offset fields missing" flag */

#define EB_NTSD_C_LEN     4    /* length of central NT security data */
#define EB_NTSD_L_LEN     5    /* length of minimal local NT security data */
#define EB_NTSD_VERSION   4    /* offset of NTSD version byte */
#define EB_NTSD_MAX_VER   (0)  /* maximum version # we know how to handle */

#define EB_ASI_CRC32      0    /* offset of ASI Unix field's crc32 checksum */
#define EB_ASI_MODE       4    /* offset of ASI Unix permission mode field */

/*---------------------------------------------------------------------------
    True sizes of the various headers, as defined by PKWARE--so it is not
    likely that these will ever change.  But if they do, make sure both these
    defines AND the typedefs below get updated accordingly.
  ---------------------------------------------------------------------------*/
#define LREC_SIZE   26   /* lengths of local file headers, central */
#define CREC_SIZE   42   /*  directory headers, and the end-of-    */
#define ECREC_SIZE  18   /*  central-dir record, respectively      */

#define MAX_BITS    13                 /* used in unshrink() */
#define HSIZE       (1 << MAX_BITS)    /* size of global work area */

#define LF     10        /* '\n' on ASCII machines; must be 10 due to EBCDIC */
#define CR     13        /* '\r' on ASCII machines; must be 13 due to EBCDIC */
#define CTRLZ  26        /* DOS & OS/2 EOF marker (used in fileio.c, vms.c) */

#ifdef EBCDIC
#  define foreign(c)    ascii[(uch)(c)]
#  define native(c)     ebcdic[(uch)(c)]
#  define NATIVE        "EBCDIC"
#  define NOANSIFILT
#endif

#if (defined(CRAY) && defined(ZMEM))
#  undef ZMEM
#endif

#ifdef ZMEM
#  undef ZMEM
#  define memcmp(b1,b2,len)      bcmp(b2,b1,len)
#  define memcpy(dest,src,len)   bcopy(src,dest,len)
#  define memzero                bzero
#else
#  define memzero(dest,len)      memset(dest,0,len)
#endif

#ifdef VMS
#  define ENV_UNZIP       "UNZIP_OPTS"     /* names of environment variables */
#  define ENV_ZIPINFO     "ZIPINFO_OPTS"
#endif /* VMS */
#ifdef RISCOS
#  define ENV_UNZIP       "Unzip$Options"
#  define ENV_ZIPINFO     "Zipinfo$Options"
#  define ENV_UNZIPEXTS   "Unzip$Exts"
#endif /* RISCOS */
#ifndef ENV_UNZIP
#  define ENV_UNZIP       "UNZIP"          /* the standard names */
#  define ENV_ZIPINFO     "ZIPINFO"
#endif
#define ENV_UNZIP2        "UNZIPOPT"     /* alternate names, for zip compat. */
#define ENV_ZIPINFO2      "ZIPINFOOPT"

#if (!defined(QQ) && !defined(NOQQ))
#  define QQ
#endif

#ifdef QQ                         /* Newtware version:  no file */
#  define QCOND     (!uO.qflag)   /*  comments with -vq or -vqq */
#else                             /* Bill Davidsen version:  no way to */
#  define QCOND     (longhdr)     /*  kill file comments when listing */
#endif

#ifdef OLD_QQ
#  define QCOND2    (uO.qflag < 2)
#else
#  define QCOND2    (!uO.qflag)
#endif

#ifndef TRUE
#  define TRUE      1   /* sort of obvious */
#endif
#ifndef FALSE
#  define FALSE     0
#endif

#ifndef SEEK_SET
#  define SEEK_SET  0
#  define SEEK_CUR  1
#  define SEEK_END  2
#endif

#if (defined(UNIX) && defined(S_IFLNK) && !defined(MTS))
#  define SYMLINKS
#  ifndef S_ISLNK
#    define S_ISLNK(m)  (((m) & S_IFMT) == S_IFLNK)
#  endif
#endif /* UNIX && S_IFLNK && !MTS */

#ifndef S_ISDIR
#  ifdef CMS_MVS
#    define S_ISDIR(m)  (FALSE)
#  else
#    define S_ISDIR(m)  (((m) & S_IFMT) == S_IFDIR)
# endif
#endif

#ifndef IS_VOLID
#  define IS_VOLID(m)  ((m) & 0x08)
#endif





/**************/
/*  Typedefs  */
/**************/

#ifdef NO_UID_GID
#  ifdef UID_USHORT
     typedef unsigned short  uid_t;    /* TI SysV.3 */
     typedef unsigned short  gid_t;
#  else
     typedef unsigned int    uid_t;    /* SCO Xenix */
     typedef unsigned int    gid_t;
#  endif
#endif

#if (defined(WIN32) || defined(sgi) || defined(GOT_UTIMBUF) || defined(ATARI))
   typedef struct utimbuf ztimbuf;
#else
   typedef struct ztimbuf {
       time_t actime;        /* new access time */
       time_t modtime;       /* new modification time */
   } ztimbuf;
#endif

typedef struct iztimes {
   time_t atime;             /* new access time */
   time_t mtime;             /* new modification time */
   time_t ctime;             /* used for creation time; NOT same as st_ctime */
} iztimes;

#ifdef SET_DIR_ATTRIB
   typedef struct dirtime {  /* temporary struct for holding directory info */
       struct dirtime *next; /*  until can be sorted and set at end */
       char *fn;             /* filename of directory */
       union {
           iztimes t3;       /* mtime, atime, ctime */
           ztimbuf t2;       /* modtime, actime */
       } u;
       unsigned perms;       /* same as min_info.file_attr */
       int have_uidgid;      /* flag */
       ush uidgid[2];
   } dirtime;
#endif /* SET_DIR_ATTRIB */

typedef struct min_info {
    long offset;
    ulg crc;                 /* crc (needed if extended header) */
    ulg compr_size;          /* compressed size (needed if extended header) */
    ulg uncompr_size;        /* uncompressed size (needed if extended header) */
    int hostnum;
    unsigned file_attr;      /* local flavor, as used by creat(), chmod()... */
    unsigned encrypted : 1;  /* file encrypted: decrypt before uncompressing */
    unsigned ExtLocHdr : 1;  /* use time instead of CRC for decrypt check */
    unsigned textfile : 1;   /* file is text (according to zip) */
    unsigned textmode : 1;   /* file is to be extracted as text */
    unsigned lcflag : 1;     /* convert filename to lowercase */
    unsigned vollabel : 1;   /* "file" is an MS-DOS volume (disk) label */
} min_info;

typedef struct VMStimbuf {
    char *revdate;    /* (both roughly correspond to Unix modtime/st_mtime) */
    char *credate;
} VMStimbuf;

/*---------------------------------------------------------------------------
    Zipfile work area declarations.
  ---------------------------------------------------------------------------*/

#ifdef MALLOC_WORK
   union work {
     struct {                 /* unshrink(): */
       shrint *Parent;          /* (8193 * sizeof(shrint)) */
       uch *value;
       uch *Stack;
     } shrink;
     uch *Slide;              /* explode(), inflate(), unreduce() */
   };
#else /* !MALLOC_WORK */
   union work {
     struct {                 /* unshrink(): */
       shrint Parent[HSIZE];    /* (8192 * sizeof(shrint)) == 16KB minimum */
       uch value[HSIZE];        /* 8KB */
       uch Stack[HSIZE];        /* 8KB */
     } shrink;                  /* total = 32KB minimum; 80KB on Cray/Alpha */
     uch Slide[WSIZE];        /* explode(), inflate(), unreduce() */
   };
#endif /* ?MALLOC_WORK */

#define slide  G.area.Slide

#if (defined(DLL) && !defined(NO_SLIDE_REDIR))
#  define redirSlide G.redirect_sldptr
#else
#  define redirSlide G.area.Slide
#endif

/*---------------------------------------------------------------------------
    Zipfile layout declarations.  If these headers ever change, make sure the
    xxREC_SIZE defines (above) change with them!
  ---------------------------------------------------------------------------*/

   typedef uch   local_byte_hdr[ LREC_SIZE ];
#      define L_VERSION_NEEDED_TO_EXTRACT_0     0
#      define L_VERSION_NEEDED_TO_EXTRACT_1     1
#      define L_GENERAL_PURPOSE_BIT_FLAG        2
#      define L_COMPRESSION_METHOD              4
#      define L_LAST_MOD_DOS_DATETIME           6
#      define L_CRC32                           10
#      define L_COMPRESSED_SIZE                 14
#      define L_UNCOMPRESSED_SIZE               18
#      define L_FILENAME_LENGTH                 22
#      define L_EXTRA_FIELD_LENGTH              24

   typedef uch   cdir_byte_hdr[ CREC_SIZE ];
#      define C_VERSION_MADE_BY_0               0
#      define C_VERSION_MADE_BY_1               1
#      define C_VERSION_NEEDED_TO_EXTRACT_0     2
#      define C_VERSION_NEEDED_TO_EXTRACT_1     3
#      define C_GENERAL_PURPOSE_BIT_FLAG        4
#      define C_COMPRESSION_METHOD              6
#      define C_LAST_MOD_DOS_DATETIME           8
#      define C_CRC32                           12
#      define C_COMPRESSED_SIZE                 16
#      define C_UNCOMPRESSED_SIZE               20
#      define C_FILENAME_LENGTH                 24
#      define C_EXTRA_FIELD_LENGTH              26
#      define C_FILE_COMMENT_LENGTH             28
#      define C_DISK_NUMBER_START               30
#      define C_INTERNAL_FILE_ATTRIBUTES        32
#      define C_EXTERNAL_FILE_ATTRIBUTES        34
#      define C_RELATIVE_OFFSET_LOCAL_HEADER    38

   typedef uch   ec_byte_rec[ ECREC_SIZE+4 ];
/*     define SIGNATURE                         0   space-holder only */
#      define NUMBER_THIS_DISK                  4
#      define NUM_DISK_WITH_START_CENTRAL_DIR   6
#      define NUM_ENTRIES_CENTRL_DIR_THS_DISK   8
#      define TOTAL_ENTRIES_CENTRAL_DIR         10
#      define SIZE_CENTRAL_DIRECTORY            12
#      define OFFSET_START_CENTRAL_DIRECTORY    16
#      define ZIPFILE_COMMENT_LENGTH            20


   typedef struct local_file_header {                 /* LOCAL */
       uch version_needed_to_extract[2];
       ush general_purpose_bit_flag;
       ush compression_method;
       ulg last_mod_dos_datetime;
       ulg crc32;
       ulg csize;