isz2iso/isz.h

   1 int8_t ISZ_MAGIC[] = {0x49, 0x73, 0x5a, 0x21}; // "IsZ!" on x86
   2
   3 typedef struct isz_header_st {
   4   int8_t signature[4];  //00-03, 'IsZ!'
   5   uint8_t header_sz;    //04   , header size in bytes
   6   int8_t version;               //05   , version number
   7
   8   uint32_t vsn;         //06-09, volume serial number
   9
  10   uint16_t sector_sz;   //10-11, sector size in bytes
  11   uint32_t total_sectors;//12-15, total sectors of ISO image
  12
  13   int8_t has_password;  //16   , is Password protected?
  14
  15   int64_t segment_sz;   //17-24, size of segments in bytes
  16   uint32_t nblocks;             //25-28, number of chunks in image
  17   uint32_t block_sz;    //29-32, chunk size in bytes (must be multiple of sector_size)
  18   uint8_t block_ptr_sz; //33   , chunk pointer length
  19
  20   int8_t segment_num;   //34   , segment number of this segment file, max 99
  21
  22   uint32_t chunk_offset;        //35-38, offset of chunk pointers, zero = none
  23   uint32_t segment_offset;      //39-42, offset of segment pointers, zero = none
  24   uint32_t data_offset; //43-46, data offset
  25   int8_t reserved;              //47      ,
  26
  27   // next byte at 48 = size, size = 64 unpacked
  28 }__attribute__ ((packed)) isz_header ;
  29
  30 //contents of 'has_password'
  31 #define ADI_PLAIN       0        // no encryption
  32 #define ADI_PASSWORD    1        // password protected (not used)
  33 #define ADI_AES128      2        // AES128 encryption
  34 #define ADI_AES192      3        // AES192 encryption
  35 #define ADI_AES256      4        // AES256 encryption
  36
  37 // if 'segment_offset' != 0
  38 typedef struct isz_seg_st {
  39   int64_t size;                  // segment size in bytes
  40   int32_t num_chks;                  // number of chunks in current file
  41   int32_t first_chkno;               // first chunk number in current file
  42   int32_t chk_off;                   // offset to first chunk in current file
  43   int32_t left_size;                 // uncompltete chunk bytes in next file
  44 } isz_seg;
  45
  46 // if 'chunk_offset' != 0
  47 /*
  48 typedef struct isz_chunk_st {
  49   chunk_flag;
  50   blk_len;
  51 } isz_chunk;
  52 */
  53
  54 // chunk_flag
  55 #define ADI_ZERO        0x00    // all zeros chunk
  56 #define ADI_DATA        0x40    // non-compressed data
  57 #define ADI_ZLIB        0x80    // ZLIB compressed
  58 #define ADI_BZ2         0xC0    // BZIP2 compressed
  59
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