gprofng/src/DbeJarFile.cc

   1 /* Copyright (C) 2021-2024 Free Software Foundation, Inc.
   2    Contributed by Oracle.
   3
   4    This file is part of GNU Binutils.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 #include "config.h"
  22 #include <sys/types.h>
  23 #include <fcntl.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26
  27 #include "zlib.h"
  28 #include "util.h"
  29 #include "DbeJarFile.h"
  30 #include "Data_window.h"
  31 #include "vec.h"
  32
  33 static uint32_t
  34 get_u1 (unsigned char *b)
  35 {
  36   return (uint32_t) ((b)[0]);
  37 }
  38
  39 static uint32_t
  40 get_u2 (unsigned char *b)
  41 {
  42   return (get_u1 (b + 1) << 8) | get_u1 (b);
  43 }
  44
  45 static uint32_t
  46 get_u4 (unsigned char *b)
  47 {
  48   return (get_u2 (b + 2) << 16) | get_u2 (b);
  49 }
  50
  51 static uint64_t
  52 get_u8 (unsigned char *b)
  53 {
  54   return (((uint64_t) get_u4 (b + 4)) << 32) | get_u4 (b);
  55 }
  56
  57 enum
  58 {
  59   END_CENT_DIR_SIZE     = 22,
  60   LOC_FILE_HEADER_SIZE  = 30,
  61   CENT_FILE_HEADER_SIZE = 46,
  62   ZIP64_LOCATOR_SIZE    = 20,
  63   ZIP64_CENT_DIR_SIZE   = 56,
  64   ZIP_BUF_SIZE          = 65536
  65 };
  66
  67 struct EndCentDir
  68 {
  69   uint64_t count;
  70   uint64_t size;
  71   uint64_t offset;
  72 };
  73
  74 class ZipEntry
  75 {
  76 public:
  77
  78   ZipEntry ()
  79   {
  80     name = NULL;
  81     data_offset = 0;
  82   }
  83
  84   ~ZipEntry ()
  85   {
  86     free (name);
  87   }
  88
  89   int
  90   compare (ZipEntry *ze)
  91   {
  92     return dbe_strcmp (name, ze->name);
  93   }
  94
  95   char *name;       // entry name
  96   int time;         // modification time
  97   int64_t size;     // size of uncompressed data
  98   int64_t csize;    // size of compressed data (zero if uncompressed)
  99   uint32_t compressionMethod;
 100   int64_t offset;   // offset of LOC header
 101   int64_t data_offset;
 102 };
 103
 104 static int
 105 cmp_names (const void *a, const void *b)
 106 {
 107   ZipEntry *e1 = *((ZipEntry **) a);
 108   ZipEntry *e2 = *((ZipEntry **) b);
 109   return e1->compare (e2);
 110 }
 111
 112 template<> void Vector<ZipEntry *>::dump (const char *msg)
 113 {
 114   Dprintf (1, NTXT ("Vector<ZipEntry *> %s  [%lld]\n"), msg ? msg : NTXT (""), (long long) size ());
 115   for (long i = 0, sz = size (); i < sz; i++)
 116     {
 117       ZipEntry *ze = get (i);
 118       Dprintf (1, NTXT ("  %lld offset:%lld (0x%llx) size: %lld --> %lld %s\n"),
 119                (long long) i, (long long) ze->offset, (long long) ze->offset,
 120                (long long) ze->csize, (long long) ze->size, STR (ze->name));
 121     }
 122 }
 123
 124 DbeJarFile::DbeJarFile (const char *jarName)
 125 {
 126   name = strdup (jarName);
 127   fnames = NULL;
 128   dwin = new Data_window (name);
 129   get_entries ();
 130 }
 131
 132 DbeJarFile::~DbeJarFile ()
 133 {
 134   free (name);
 135   delete fnames;
 136 }
 137
 138 void
 139 DbeJarFile::get_entries ()
 140 {
 141   Dprintf (DUMP_JAR_FILE, NTXT ("\nArchive: %s\n"), STR (name));
 142   if (dwin->not_opened ())
 143     {
 144       append_msg (CMSG_ERROR, GTXT ("Cannot open file `%s'"), name);
 145       return;
 146     }
 147   struct EndCentDir endCentDir;
 148   if (get_EndCentDir (&endCentDir) == 0)
 149     return;
 150
 151   if (endCentDir.count == 0)
 152     {
 153       append_msg (CMSG_WARN, GTXT ("No files in %s"), name);
 154       return;
 155     }
 156   unsigned char *b = (unsigned char *) dwin->bind (endCentDir.offset, endCentDir.size);
 157   if (b == NULL)
 158     {
 159       append_msg (CMSG_ERROR, GTXT ("%s: cannot read the central directory record"), name);
 160       return;
 161     }
 162
 163   fnames = new Vector<ZipEntry*>(endCentDir.count);
 164   for (uint64_t i = 0, offset = endCentDir.offset, last = endCentDir.offset + endCentDir.size; i < endCentDir.count; i++)
 165     {
 166       if ((last - offset) < CENT_FILE_HEADER_SIZE)
 167         {
 168           append_msg (CMSG_ERROR, GTXT ("%s: cannot read the central file header (%lld (from %lld), offset=0x%016llx last=0x%016llx"),
 169                       name, (long long) i, (long long) endCentDir.count, (long long) offset, (long long) last);
 170           break;
 171         }
 172       b = (unsigned char *) dwin->bind (offset, CENT_FILE_HEADER_SIZE);
 173       //  Central file header
 174       //  Offset Bytes    Description
 175       //     0     4   central file header signature = 0x02014b50
 176       //     4     2   version made by
 177       //     6     2   version needed to extract
 178       //     8     2   general purpose bit flag
 179       //    10     2   compression method
 180       //    12     2   last mod file time
 181       //    14     2   last mod file date
 182       //    16     4   crc-32
 183       //    20     4   compressed size
 184       //    24     4   uncompressed size
 185       //    28     2   file name length
 186       //    30     2   extra field length
 187       //    32     2   file comment length
 188       //    34     2   disk number start
 189       //    36     2   internal file attributes
 190       //    38     4   external file attributes
 191       //    42     4   relative offset of local header
 192       //    46         file name (variable size)
 193       //               extra field (variable size)
 194       //               file comment (variable size)
 195       uint32_t signature = get_u4 (b);
 196       if (signature != 0x02014b50)
 197         {
 198           append_msg (CMSG_ERROR, GTXT ("%s: wrong header signature (%lld (total %lld), offset=0x%016llx last=0x%016llx"),
 199                       name, (long long) i, (long long) endCentDir.count, (long long) offset, (long long) last);
 200           break;
 201         }
 202       ZipEntry *ze = new ZipEntry ();
 203       fnames->append (ze);
 204       uint32_t name_len = get_u2 (b + 28);
 205       uint32_t extra_len = get_u2 (b + 30);
 206       uint32_t comment_len = get_u2 (b + 32);
 207       ze->compressionMethod = get_u2 (b + 10);
 208       ze->csize = get_u4 (b + 20);
 209       ze->size = get_u4 (b + 24);
 210       ze->offset = get_u4 (b + 42);
 211       char *nm = (char *) dwin->bind (offset + 46, name_len);
 212       if (nm)
 213         {
 214           ze->name = (char *) malloc (name_len + 1);
 215           strncpy (ze->name, nm, name_len);
 216           ze->name[name_len] = 0;
 217         }
 218       offset += CENT_FILE_HEADER_SIZE + name_len + extra_len + comment_len;
 219     }
 220   fnames->sort (cmp_names);
 221   if (DUMP_JAR_FILE)
 222     fnames->dump (get_basename (name));
 223 }
 224
 225 int
 226 DbeJarFile::get_entry (const char *fname)
 227 {
 228   if (fnames == NULL)
 229     return -1;
 230   ZipEntry zipEntry, *ze = &zipEntry;
 231   ze->name = (char *) fname;
 232   int ind = fnames->bisearch (0, -1, &ze, cmp_names);
 233   ze->name = NULL;
 234   return ind;
 235 }
 236
 237 long long
 238 DbeJarFile::copy (char *toFileNname, int fromEntryNum)
 239 {
 240   if (fromEntryNum < 0 || fromEntryNum >= VecSize (fnames))
 241     return -1;
 242   ZipEntry *ze = fnames->get (fromEntryNum);
 243   if (ze->data_offset == 0)
 244     {
 245       //  Local file header
 246       //  Offset Bytes    Description
 247       //     0     4   local file header signature = 0x04034b50
 248       //     4     2   version needed to extract
 249       //     6     2   general purpose bit flag
 250       //     8     2   compression method
 251       //    10     2   last mod file time
 252       //    12     2   last mod file date
 253       //    14     4   crc-32
 254       //    18     4   compressed size
 255       //    22     4   uncompressed size
 256       //    26     2   file name length
 257       //    28     2   extra field length
 258       //    30     2   file name (variable size)
 259       //               extra field (variable size)
 260       unsigned char *b = (unsigned char *) dwin->bind (ze->offset, LOC_FILE_HEADER_SIZE);
 261       if (b == NULL)
 262         {
 263           append_msg (CMSG_ERROR,
 264                  GTXT ("%s: Cannot read a local file header (%s offset=0x%lld"),
 265                  name, STR (ze->name), (long long) ze->offset);
 266           return -1;
 267         }
 268       uint32_t signature = get_u4 (b);
 269       if (signature != 0x04034b50)
 270         {
 271           append_msg (CMSG_ERROR,
 272                       GTXT ("%s: wrong local header signature ('%s' offset=%lld (0x%llx)"),
 273                       name, STR (ze->name), (long long) ze->offset,
 274                       (long long) ze->offset);
 275           return -1;
 276         }
 277       ze->data_offset = ze->offset + LOC_FILE_HEADER_SIZE + get_u2 (b + 26) + get_u2 (b + 28);
 278     }
 279
 280   if (ze->compressionMethod == 0)
 281     {
 282       int fd = open (toFileNname, O_CREAT | O_WRONLY | O_LARGEFILE, 0644);
 283       if (fd == -1)
 284         {
 285           append_msg (CMSG_ERROR, GTXT ("Cannot create file %s (%s)"), toFileNname, STR (strerror (errno)));
 286           return -1;
 287         }
 288       long long len = dwin->copy_to_file (fd, ze->data_offset, ze->size);
 289       close (fd);
 290       if (len != ze->size)
 291         {
 292           append_msg (CMSG_ERROR, GTXT ("%s: Cannot write %lld bytes (only %lld)"),
 293                       toFileNname, (long long) ze->size, (long long) len);
 294           unlink (toFileNname);
 295           return -1;
 296         }
 297       return len;
 298     }
 299
 300   unsigned char *b = (unsigned char *) dwin->bind (ze->data_offset, ze->csize);
 301   if (b == NULL)
 302     {
 303       append_msg (CMSG_ERROR,
 304                   GTXT ("%s: Cannot extract file %s (offset=0x%lld csize=%lld)"),
 305                   name, STR (ze->name), (long long) ze->offset,
 306                   (long long) ze->csize);
 307       return -1;
 308     }
 309   z_stream strm;
 310   strm.zalloc = Z_NULL;
 311   strm.zfree = Z_NULL;
 312   strm.opaque = Z_NULL;
 313   strm.next_in = Z_NULL;
 314   strm.avail_in = 0;
 315   if (inflateInit2 (&strm, -MAX_WBITS) != Z_OK)
 316     {
 317       append_msg (CMSG_ERROR, GTXT ("%s: inflateInit2 failed (%s)"), STR (ze->name), STR (strm.msg));
 318       return -1;
 319     }
 320   strm.avail_in = ze->csize;
 321   strm.next_in = b;
 322   int retval = ze->size;
 323   unsigned char *buf = (unsigned char *) malloc (ze->size);
 324   for (;;)
 325     {
 326       strm.next_out = buf;
 327       strm.avail_out = ze->size;
 328       int ret = inflate (&strm, Z_SYNC_FLUSH);
 329       if ((ret == Z_NEED_DICT) || (ret == Z_DATA_ERROR) || (ret == Z_MEM_ERROR) || (ret == Z_STREAM_ERROR))
 330         {
 331           append_msg (CMSG_ERROR, GTXT ("%s: inflate('%s') error %d (%s)"), name, STR (ze->name), ret, STR (strm.msg));
 332           retval = -1;
 333           break;
 334         }
 335       if (strm.avail_out != 0)
 336         break;
 337     }
 338   inflateEnd (&strm);
 339   if (retval != -1)
 340     {
 341       int fd = open (toFileNname, O_CREAT | O_WRONLY | O_LARGEFILE, 0644);
 342       if (fd == -1)
 343         {
 344           append_msg (CMSG_ERROR, GTXT ("Cannot create file %s (%s)"), toFileNname, STR (strerror (errno)));
 345           retval = -1;
 346         }
 347       else
 348         {
 349           long long len = write (fd, buf, ze->size);
 350           if (len != ze->size)
 351             {
 352               append_msg (CMSG_ERROR, GTXT ("%s: Cannot write %lld bytes (only %lld)"),
 353                           toFileNname, (long long) strm.avail_out, (long long) len);
 354               retval = -1;
 355             }
 356           close (fd);
 357         }
 358     }
 359   free (buf);
 360   return retval;
 361 }
 362
 363 int
 364 DbeJarFile::get_EndCentDir (struct EndCentDir *endCentDir)
 365 {
 366   int64_t fsize = dwin->get_fsize ();
 367   int64_t sz = (fsize < ZIP_BUF_SIZE) ? fsize : ZIP_BUF_SIZE;
 368
 369   // Find the end of central directory record:
 370   unsigned char *b = (unsigned char *) dwin->bind (fsize - sz, sz);
 371   if (b == NULL)
 372     {
 373       append_msg (CMSG_ERROR, GTXT ("%s: cannot find the central directory record (fsize=%lld)"),
 374                   name, (long long) fsize);
 375       return 0;
 376     }
 377
 378   //  End of central directory record:
 379   //  Offset Bytes    Description
 380   //     0     4    end of central directory signature = 0x06054b50
 381   //     4     2    number of this disk
 382   //     6     2    disk where central directory starts
 383   //     8     2    number of central directory records on this disk
 384   //    10     2    total number of central directory records
 385   //    12     4    size of central directory(bytes)
 386   //    16     4    offset of start of central directory, relative to start of archive
 387   //    20     2    comment length(n)
 388   //    22     n    comment
 389
 390   endCentDir->count = 0;
 391   endCentDir->size = 0;
 392   endCentDir->offset = 0;
 393   int64_t ecdrOffset = fsize;
 394   for (int64_t i = END_CENT_DIR_SIZE; i < sz; i++)
 395     {
 396       b = (unsigned char *) dwin->bind (fsize - i, END_CENT_DIR_SIZE);
 397       if (b == NULL)
 398         {
 399           append_msg (CMSG_ERROR, GTXT ("%s: read failed (offset:0x%llx  bytes:%lld"),
 400                       name, (long long) (fsize - i), (long long) END_CENT_DIR_SIZE);
 401           break;
 402         }
 403       uint32_t signature = get_u4 (b);
 404       if (signature == 0x06054b50)
 405         {
 406           int64_t len_comment = get_u2 (b + 20);
 407           if (i != (len_comment + END_CENT_DIR_SIZE))
 408             continue;
 409           ecdrOffset = fsize - i;
 410           endCentDir->count = get_u2 (b + 10);
 411           endCentDir->size = get_u4 (b + 12);
 412           endCentDir->offset = get_u4 (b + 16);
 413           Dprintf (DUMP_JAR_FILE,
 414                    "  Zip archive file size:              %10lld (0x%016llx)\n"
 415                    "  end-cent-dir record offset:         %10lld (0x%016llx)\n"
 416                    "  cent-dir offset:                    %10lld (0x%016llx)\n"
 417                    "  cent-dir size:                      %10lld (0x%016llx)\n"
 418                    "  cent-dir entries:                   %10lld\n",
 419                    (long long) fsize, (long long) fsize,
 420                    (long long) ecdrOffset, (long long) ecdrOffset,
 421                    (long long) endCentDir->offset, (long long) endCentDir->offset,
 422                    (long long) endCentDir->size, (long long) endCentDir->size,
 423                    (long long) endCentDir->count);
 424           break;
 425         }
 426     }
 427   if (ecdrOffset == fsize)
 428     {
 429       append_msg (CMSG_ERROR,
 430                   GTXT ("%s: cannot find the central directory record"), name);
 431       return 0;
 432     }
 433   if (endCentDir->count == 0xffff || endCentDir->offset == 0xffffffff
 434       || endCentDir->size == 0xffffffff)
 435     {
 436       // Zip64 format:
 437       //      Zip64 end of central directory record
 438       //      Zip64 end of central directory locator  ( Can be absent )
 439       //      End of central directory record
 440       b = (unsigned char *) dwin->bind (ecdrOffset - ZIP64_LOCATOR_SIZE,
 441                                         ZIP64_LOCATOR_SIZE);
 442       if (b == NULL)
 443         {
 444           append_msg (CMSG_ERROR,
 445              GTXT ("%s: cannot find the Zip64 central directory record"), name);
 446           return 0;
 447         }
 448       uint32_t signature = get_u4 (b);
 449       if (signature == 0x07064b50)
 450         { // Get an offset from the Zip64 cent-dir locator
 451           //  Zip64 end of central directory locator
 452           //  Offset Bytes    Description
 453           //     0     4    Zip64 end of central dir locator signature = 0x07064b50
 454           //     4     4    number of the disk with the start of the zip64 end of central directory
 455           //     8     8    relative offset of the Zip64 end of central directory record
 456           //    12     4    total number of disks
 457           Dprintf (DUMP_JAR_FILE, "    cent-dir locator offset           %10lld (0x%016llx)\n",
 458                    (long long) (ecdrOffset - ZIP64_LOCATOR_SIZE), (long long) (ecdrOffset - ZIP64_LOCATOR_SIZE));
 459           ecdrOffset = get_u8 (b + 8);
 460         }
 461       else   // the Zip64 end of central directory locator is absent
 462         ecdrOffset -= ZIP64_CENT_DIR_SIZE;
 463       Dprintf (DUMP_JAR_FILE, NTXT ("  Zip64 end-cent-dir record offset:   %10lld (0x%016llx)\n"),
 464                (long long) ecdrOffset, (long long) ecdrOffset);
 465
 466       b = (unsigned char *) dwin->bind (ecdrOffset, ZIP64_CENT_DIR_SIZE);
 467       if (b == NULL)
 468         {
 469           append_msg (CMSG_ERROR,
 470              GTXT ("%s: cannot find the Zip64 central directory record"), name);
 471           return 0;
 472         }
 473       //  Zip64 end of central directory record
 474       //  Offset Bytes    Description
 475       //     0     4    Zip64 end of central dir signature = 0x06064b50
 476       //     4     8    size of zip64 end of central directory record
 477       //    12     2    version made by
 478       //    14     2    version needed to extract
 479       //    16     4    number of this disk
 480       //    20     4    number of the disk with the start of the central directory
 481       //    24     8    total number of entries in the central directory on this disk
 482       //    32     8    total number of entries in the central directory
 483       //    40     8    size of the central directory
 484       //    48     8    offset of start of centraldirectory with respect to the starting disk number
 485       //    56          Zip64 extensible data sector (variable size)
 486       signature = get_u4 (b);
 487       if (signature != 0x06064b50)
 488         {
 489           append_msg (CMSG_ERROR, GTXT ("%s: cannot find the Zip64 central directory record"), name);
 490           return 0;
 491         }
 492       endCentDir->count = get_u8 (b + 32);
 493       endCentDir->size = get_u8 (b + 40);
 494       endCentDir->offset = get_u8 (b + 48);
 495       Dprintf (DUMP_JAR_FILE,
 496                NTXT ("  cent-dir offset:                    %10lld (0x%016llx)\n"
 497                      "  cent-dir size:                      %10lld (0x%016llx)\n"
 498                      "  cent-dir entries:                   %10lld\n"),
 499                (long long) endCentDir->offset, (long long) endCentDir->offset,
 500                (long long) endCentDir->size, (long long) endCentDir->size,
 501                (long long) endCentDir->count);
 502     }
 503   return 1;
 504 }
 505