ldid.cpp

   1 /* JocStrap - Java/Objective-C Bootstrap
   2  * Copyright (C) 2007  Jay Freeman (saurik)
   3 */
   4
   5 /*
   6  *        Redistribution and use in source and binary
   7  * forms, with or without modification, are permitted
   8  * provided that the following conditions are met:
   9  *
  10  * 1. Redistributions of source code must retain the
  11  *    above copyright notice, this list of conditions
  12  *    and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the
  14  *    above copyright notice, this list of conditions
  15  *    and the following disclaimer in the documentation
  16  *    and/or other materials provided with the
  17  *    distribution.
  18  * 3. The name of the author may not be used to endorse
  19  *    or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  24  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  28  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  33  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  34  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  35  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38 #include "minimal/stdlib.h"
  39 #include "minimal/string.h"
  40 #include "minimal/mapping.h"
  41
  42 #include "sha1.h"
  43
  44 #include <cstring>
  45 #include <string>
  46 #include <vector>
  47
  48 #include <sys/wait.h>
  49 #include <sys/types.h>
  50 #include <sys/stat.h>
  51
  52 struct fat_header {
  53     uint32_t magic;
  54     uint32_t nfat_arch;
  55 } _packed;
  56
  57 #define FAT_MAGIC 0xcafebabe
  58 #define FAT_CIGAM 0xbebafeca
  59
  60 struct fat_arch {
  61     uint32_t cputype;
  62     uint32_t cpusubtype;
  63     uint32_t offset;
  64     uint32_t size;
  65     uint32_t align;
  66 } _packed;
  67
  68 struct mach_header {
  69     uint32_t magic;
  70     uint32_t cputype;
  71     uint32_t cpusubtype;
  72     uint32_t filetype;
  73     uint32_t ncmds;
  74     uint32_t sizeofcmds;
  75     uint32_t flags;
  76 } _packed;
  77
  78 #define MH_MAGIC 0xfeedface
  79 #define MH_CIGAM 0xcefaedfe
  80
  81 #define MH_DYLDLINK   0x4
  82
  83 #define MH_EXECUTE    0x2
  84 #define MH_DYLIB      0x6
  85 #define MH_BUNDLE     0x8
  86 #define MH_DYLIB_STUB 0x9
  87
  88 struct load_command {
  89     uint32_t cmd;
  90     uint32_t cmdsize;
  91 } _packed;
  92
  93 #define LC_REQ_DYLD  0x80000000
  94
  95 #define LC_SEGMENT         0x01
  96 #define LC_LOAD_DYLIB      0x0c
  97 #define LC_ID_DYLIB        0x0d
  98 #define LC_UUID            0x1b
  99 #define LC_CODE_SIGNATURE  0x1d
 100 #define LC_REEXPORT_DYLIB (0x1f | LC_REQ_DYLD)
 101
 102 struct dylib {
 103     uint32_t name;
 104     uint32_t timestamp;
 105     uint32_t current_version;
 106     uint32_t compatibility_version;
 107 } _packed;
 108
 109 struct dylib_command {
 110     uint32_t cmd;
 111     uint32_t cmdsize;
 112     struct dylib dylib;
 113 } _packed;
 114
 115 struct uuid_command {
 116     uint32_t cmd;
 117     uint32_t cmdsize;
 118     uint8_t uuid[16];
 119 } _packed;
 120
 121 struct segment_command {
 122     uint32_t cmd;
 123     uint32_t cmdsize;
 124     char segname[16];
 125     uint32_t vmaddr;
 126     uint32_t vmsize;
 127     uint32_t fileoff;
 128     uint32_t filesize;
 129     uint32_t maxprot;
 130     uint32_t initprot;
 131     uint32_t nsects;
 132     uint32_t flags;
 133 };
 134
 135 struct section {
 136     char sectname[16];
 137     char segname[16];
 138     uint32_t addr;
 139     uint32_t size;
 140     uint32_t offset;
 141     uint32_t align;
 142     uint32_t reloff;
 143     uint32_t nreloc;
 144     uint32_t flags;
 145     uint32_t reserved1;
 146     uint32_t reserved2;
 147 };
 148
 149 struct linkedit_data_command {
 150     uint32_t cmd;
 151     uint32_t cmdsize;
 152     uint32_t dataoff;
 153     uint32_t datasize;
 154 } _packed;
 155
 156 uint16_t Swap_(uint16_t value) {
 157     return
 158         ((value >>  8) & 0x00ff) |
 159         ((value <<  8) & 0xff00);
 160 }
 161
 162 uint32_t Swap_(uint32_t value) {
 163     value = ((value >>  8) & 0x00ff00ff) |
 164             ((value <<  8) & 0xff00ff00);
 165     value = ((value >> 16) & 0x0000ffff) |
 166             ((value << 16) & 0xffff0000);
 167     return value;
 168 }
 169
 170 int16_t Swap_(int16_t value) {
 171     return Swap_(static_cast<uint16_t>(value));
 172 }
 173
 174 int32_t Swap_(int32_t value) {
 175     return Swap_(static_cast<uint32_t>(value));
 176 }
 177
 178 uint16_t Swap(uint16_t value) {
 179     return true ? Swap_(value) : value;
 180 }
 181
 182 uint32_t Swap(uint32_t value) {
 183     return true ? Swap_(value) : value;
 184 }
 185
 186 int16_t Swap(int16_t value) {
 187     return Swap(static_cast<uint16_t>(value));
 188 }
 189
 190 int32_t Swap(int32_t value) {
 191     return Swap(static_cast<uint32_t>(value));
 192 }
 193
 194 template <typename Target_>
 195 class Pointer;
 196
 197 class Framework {
 198   private:
 199     void *base_;
 200     size_t size_;
 201     mach_header *mach_header_;
 202     bool swapped_;
 203
 204   public:
 205     uint16_t Swap(uint16_t value) const {
 206         return swapped_ ? Swap_(value) : value;
 207     }
 208
 209     uint32_t Swap(uint32_t value) const {
 210         return swapped_ ? Swap_(value) : value;
 211     }
 212
 213     int16_t Swap(int16_t value) const {
 214         return Swap(static_cast<uint16_t>(value));
 215     }
 216
 217     int32_t Swap(int32_t value) const {
 218         return Swap(static_cast<uint32_t>(value));
 219     }
 220
 221     Framework(const char *framework_path) :
 222         swapped_(false)
 223     {
 224         base_ = map(framework_path, 0, _not(size_t), &size_, false);
 225         fat_header *fat_header = reinterpret_cast<struct fat_header *>(base_);
 226
 227         if (Swap(fat_header->magic) == FAT_CIGAM) {
 228             swapped_ = !swapped_;
 229             goto fat;
 230         } else if (Swap(fat_header->magic) != FAT_MAGIC)
 231             mach_header_ = (mach_header *) base_;
 232         else fat: {
 233             size_t fat_narch = Swap(fat_header->nfat_arch);
 234             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header + 1);
 235             size_t arch;
 236             for (arch = 0; arch != fat_narch; ++arch) {
 237                 uint32_t arch_offset = Swap(fat_arch->offset);
 238                 mach_header_ = (mach_header *) ((uint8_t *) base_ + arch_offset);
 239                 goto found;
 240                 ++fat_arch;
 241             }
 242
 243             _assert(false);
 244         }
 245
 246       found:
 247         if (Swap(mach_header_->magic) == MH_CIGAM)
 248             swapped_ = !swapped_;
 249         else _assert(Swap(mach_header_->magic) == MH_MAGIC);
 250
 251         _assert(
 252             Swap(mach_header_->filetype) == MH_EXECUTE ||
 253             Swap(mach_header_->filetype) == MH_DYLIB ||
 254             Swap(mach_header_->filetype) == MH_BUNDLE
 255         );
 256     }
 257
 258     struct mach_header *operator ->() const {
 259         return mach_header_;
 260     }
 261
 262     void *GetBase() {
 263         return base_;
 264     }
 265
 266     size_t GetSize() {
 267         return size_;
 268     }
 269
 270     std::vector<struct load_command *> GetLoadCommands() {
 271         std::vector<struct load_command *> load_commands;
 272
 273         struct load_command *load_command = reinterpret_cast<struct load_command *>(mach_header_ + 1);
 274         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 275             load_commands.push_back(load_command);
 276             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 277         }
 278
 279         return load_commands;
 280     }
 281
 282     std::vector<segment_command *> GetSegments(const char *segment_name) {
 283         std::vector<struct segment_command *> segment_commands;
 284
 285         _foreach (load_command, GetLoadCommands())
 286             if (Swap((*load_command)->cmd) == LC_SEGMENT) {
 287                 segment_command *segment_command = reinterpret_cast<struct segment_command *>(*load_command);
 288                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 289                     segment_commands.push_back(segment_command);
 290             }
 291
 292         return segment_commands;
 293     }
 294
 295     std::vector<section *> GetSections(const char *segment_name, const char *section_name) {
 296         std::vector<section *> sections;
 297
 298         _foreach (segment, GetSegments(segment_name)) {
 299             section *section = (struct section *) (*segment + 1);
 300
 301             uint32_t sect;
 302             for (sect = 0; sect != Swap((*segment)->nsects); ++sect) {
 303                 if (strncmp(section->sectname, section_name, 16) == 0)
 304                     sections.push_back(section);
 305                 ++section;
 306             }
 307         }
 308
 309         return sections;
 310     }
 311
 312     template <typename Target_>
 313     Pointer<Target_> GetPointer(uint32_t address, const char *segment_name = NULL) {
 314         load_command *load_command = (struct load_command *) (mach_header_ + 1);
 315         uint32_t cmd;
 316
 317         for (cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 318             if (Swap(load_command->cmd) == LC_SEGMENT) {
 319                 segment_command *segment_command = (struct segment_command *) load_command;
 320                 if (segment_name != NULL && strncmp(segment_command->segname, segment_name, 16) != 0)
 321                     goto next_command;
 322
 323                 section *sections = (struct section *) (segment_command + 1);
 324
 325                 uint32_t sect;
 326                 for (sect = 0; sect != Swap(segment_command->nsects); ++sect) {
 327                     section *section = &sections[sect];
 328                     //printf("%s %u %p %p %u\n", segment_command->segname, sect, address, section->addr, section->size);
 329                     if (address >= Swap(section->addr) && address < Swap(section->addr) + Swap(section->size)) {
 330                         //printf("0x%.8x %s\n", address, segment_command->segname);
 331                         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(address - Swap(section->addr) + Swap(section->offset) + (char *) mach_header_));
 332                     }
 333                 }
 334             }
 335
 336           next_command:
 337             load_command = (struct load_command *) ((char *) load_command + Swap(load_command->cmdsize));
 338         }
 339
 340         return Pointer<Target_>(this);
 341     }
 342
 343     template <typename Target_>
 344     Pointer<Target_> GetOffset(uint32_t offset) {
 345         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_));
 346     }
 347 };
 348
 349 template <typename Target_>
 350 class Pointer {
 351   private:
 352     const Framework *framework_;
 353     const Target_ *pointer_;
 354
 355   public:
 356     Pointer(const Framework *framework = NULL, const Target_ *pointer = NULL) :
 357         framework_(framework),
 358         pointer_(pointer)
 359     {
 360     }
 361
 362     operator const Target_ *() const {
 363         return pointer_;
 364     }
 365
 366     const Target_ *operator ->() const {
 367         return pointer_;
 368     }
 369
 370     Pointer<Target_> &operator ++() {
 371         ++pointer_;
 372         return *this;
 373     }
 374
 375     template <typename Value_>
 376     Value_ Swap(Value_ value) {
 377         return framework_->Swap(value);
 378     }
 379 };
 380
 381 #define CSMAGIC_CODEDIRECTORY      0xfade0c02
 382 #define CSMAGIC_EMBEDDED_SIGNATURE 0xfade0cc0
 383 #define CSMAGIC_ENTITLEMENTS       0xfade7171
 384
 385 #define CSSLOT_CODEDIRECTORY 0
 386 #define CSSLOT_REQUIREMENTS  2
 387 #define CSSLOT_ENTITLEMENTS  5
 388
 389 struct BlobIndex {
 390     uint32_t type;
 391     uint32_t offset;
 392 } _packed;
 393
 394 struct Blob {
 395     uint32_t magic;
 396     uint32_t length;
 397 } _packed;
 398
 399 struct SuperBlob {
 400     struct Blob blob;
 401     uint32_t count;
 402     struct BlobIndex index[];
 403 } _packed;
 404
 405 struct CodeDirectory {
 406     struct Blob blob;
 407     uint32_t version;
 408     uint32_t flags;
 409     uint32_t hashOffset;
 410     uint32_t identOffset;
 411     uint32_t nSpecialSlots;
 412     uint32_t nCodeSlots;
 413     uint32_t codeLimit;
 414     uint8_t hashSize;
 415     uint8_t hashType;
 416     uint8_t spare1;
 417     uint8_t pageSize;
 418     uint32_t spare2;
 419 } _packed;
 420
 421 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 422
 423 #define CODESIGN_ALLOCATE "arm-apple-darwin9-codesign_allocate"
 424
 425 void sha1(uint8_t *hash, uint8_t *data, size_t size) {
 426     SHA1Context context;
 427     SHA1Reset(&context);
 428     SHA1Input(&context, data, size);
 429     SHA1Result(&context, hash);
 430 }
 431
 432 int main(int argc, const char *argv[]) {
 433     bool flag_R(false);
 434     bool flag_t(false);
 435     bool flag_p(false);
 436     bool flag_u(false);
 437     bool flag_e(false);
 438
 439     bool flag_T(false);
 440
 441     bool flag_S(false);
 442     bool flag_s(false);
 443
 444     bool timeh(false);
 445     uint32_t timev(0);
 446
 447     const void *xmld(NULL);
 448     size_t xmls(0);
 449
 450     uintptr_t noffset(_not(uintptr_t));
 451     uintptr_t woffset(_not(uintptr_t));
 452
 453     std::vector<std::string> files;
 454
 455     if (argc == 1) {
 456         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
 457         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
 458         fprintf(stderr, "   %s -S cat\n", argv[0]);
 459         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
 460         exit(0);
 461     }
 462
 463     for (int argi(1); argi != argc; ++argi)
 464         if (argv[argi][0] != '-')
 465             files.push_back(argv[argi]);
 466         else switch (argv[argi][1]) {
 467             case 'R': flag_R = true; break;
 468             case 't': flag_t = true; break;
 469             case 'u': flag_u = true; break;
 470             case 'p': flag_p = true; break;
 471             case 'e': flag_e = true; break;
 472
 473             case 's':
 474                 _assert(!flag_S);
 475                 flag_s = true;
 476             break;
 477
 478             case 'S':
 479                 _assert(!flag_s);
 480                 flag_S = true;
 481                 if (argv[argi][2] != '\0') {
 482                     const char *xml = argv[argi] + 2;
 483                     xmld = map(xml, 0, _not(size_t), &xmls, true);
 484                 }
 485             break;
 486
 487             case 'T': {
 488                 flag_T = true;
 489                 if (argv[argi][2] == '-')
 490                     timeh = true;
 491                 else {
 492                     char *arge;
 493                     timev = strtoul(argv[argi] + 2, &arge, 0);
 494                     _assert(arge == argv[argi] + strlen(argv[argi]));
 495                 }
 496             } break;
 497
 498             case 'n': {
 499                 char *arge;
 500                 noffset = strtoul(argv[argi] + 2, &arge, 0);
 501                 _assert(arge == argv[argi] + strlen(argv[argi]));
 502             } break;
 503
 504             case 'w': {
 505                 char *arge;
 506                 woffset = strtoul(argv[argi] + 2, &arge, 0);
 507                 _assert(arge == argv[argi] + strlen(argv[argi]));
 508             } break;
 509
 510             default:
 511                 goto usage;
 512             break;
 513         }
 514
 515     if (files.empty()) usage: {
 516         exit(0);
 517     }
 518
 519     size_t filei(0), filee(0);
 520     _foreach (file, files) try {
 521         const char *path(file->c_str());
 522         const char *base = strrchr(path, '/');
 523         char *temp(NULL), *dir;
 524
 525         if (base != NULL)
 526             dir = strndup_(path, base++ - path + 1);
 527         else {
 528             dir = strdup("");
 529             base = path;
 530         }
 531
 532         if (flag_S) {
 533             asprintf(&temp, "%s.%s.cs", dir, base);
 534             const char *allocate = getenv("CODESIGN_ALLOCATE");
 535             if (allocate == NULL)
 536                 allocate = "codesign_allocate";
 537
 538             size_t size = _not(size_t);
 539             const char *arch; {
 540                 Framework framework(path);
 541                 framework->flags |= MH_DYLDLINK;
 542
 543                 _foreach (load_command, framework.GetLoadCommands()) {
 544                     uint32_t cmd(framework.Swap((*load_command)->cmd));
 545                     if (cmd == LC_CODE_SIGNATURE) {
 546                         struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(*load_command);
 547                         size = framework.Swap(signature->dataoff);
 548                         _assert(size < framework.GetSize());
 549                         break;
 550                     }
 551                 }
 552
 553                 if (size == _not(size_t))
 554                     size = framework.GetSize();
 555
 556                 switch (framework->cputype) {
 557                     case 12: switch (framework->cpusubtype) {
 558                         case 0: arch = "arm"; break;
 559                         case 6: arch = "armv6"; break;
 560                         default: arch = NULL; break;
 561                     } break;
 562
 563                     default: arch = NULL; break;
 564                 }
 565             }
 566
 567             _assert(arch != NULL);
 568
 569             pid_t pid = fork();
 570             _syscall(pid);
 571             if (pid == 0) {
 572                 char *ssize;
 573                 asprintf(&ssize, "%u", (sizeof(struct SuperBlob) + 2 * sizeof(struct BlobIndex) + sizeof(struct CodeDirectory) + strlen(base) + 1 + ((xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS) + (size + 0x1000 - 1) / 0x1000) * 0x14 + 0xc + (xmld == NULL ? 0 : 0x10 + xmls) + 15) / 16 * 16);
 574                 //printf("%s -i %s -a %s %s -o %s\n", allocate, path, arch, ssize, temp);
 575                 execlp(allocate, allocate, "-i", path, "-a", arch, ssize, "-o", temp, NULL);
 576                 _assert(false);
 577             }
 578
 579             int status;
 580             _syscall(waitpid(pid, &status, 0));
 581             _assert(WIFEXITED(status));
 582             _assert(WEXITSTATUS(status) == 0);
 583         }
 584
 585         Framework framework(temp == NULL ? path : temp);
 586         struct linkedit_data_command *signature(NULL);
 587
 588         if (flag_p)
 589             printf("path%zu='%s'\n", filei, file->c_str());
 590
 591         if (woffset != _not(uintptr_t)) {
 592             Pointer<uint32_t> wvalue(framework.GetPointer<uint32_t>(woffset));
 593             if (wvalue == NULL)
 594                 printf("(null) %p\n", woffset);
 595             else
 596                 printf("0x%.08x\n", *wvalue);
 597         }
 598
 599         if (noffset != _not(uintptr_t))
 600             printf("%s\n", &*framework.GetPointer<char>(noffset));
 601
 602         _foreach (load_command, framework.GetLoadCommands()) {
 603             uint32_t cmd(framework.Swap((*load_command)->cmd));
 604
 605             if (flag_R && cmd == LC_REEXPORT_DYLIB)
 606                 (*load_command)->cmd = framework.Swap(LC_LOAD_DYLIB);
 607             else if (cmd == LC_CODE_SIGNATURE)
 608                 signature = reinterpret_cast<struct linkedit_data_command *>(*load_command);
 609             else if (cmd == LC_UUID) {
 610                 volatile struct uuid_command *uuid_command(reinterpret_cast<struct uuid_command *>(*load_command));
 611
 612                 if (flag_u) {
 613                     printf("uuid%zu=%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x\n", filei,
 614                         uuid_command->uuid[ 0], uuid_command->uuid[ 1], uuid_command->uuid[ 2], uuid_command->uuid[ 3],
 615                         uuid_command->uuid[ 4], uuid_command->uuid[ 5], uuid_command->uuid[ 6], uuid_command->uuid[ 7],
 616                         uuid_command->uuid[ 8], uuid_command->uuid[ 9], uuid_command->uuid[10], uuid_command->uuid[11],
 617                         uuid_command->uuid[12], uuid_command->uuid[13], uuid_command->uuid[14], uuid_command->uuid[15]
 618                     );
 619                 }
 620             } else if (cmd == LC_ID_DYLIB) {
 621                 volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(*load_command));
 622
 623                 if (flag_t)
 624                     printf("time%zu=0x%.8x\n", filei, framework.Swap(dylib_command->dylib.timestamp));
 625
 626                 if (flag_T) {
 627                     uint32_t timed;
 628
 629                     if (!timeh)
 630                         timed = timev;
 631                     else {
 632                         dylib_command->dylib.timestamp = 0;
 633                         timed = hash(reinterpret_cast<uint8_t *>(framework.GetBase()), framework.GetSize(), timev);
 634                     }
 635
 636                     dylib_command->dylib.timestamp = framework.Swap(timed);
 637                 }
 638             }
 639         }
 640
 641         if (flag_e) {
 642             _assert(signature != NULL);
 643
 644             uint32_t data = framework.Swap(signature->dataoff);
 645             uint32_t size = framework.Swap(signature->datasize);
 646
 647             uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
 648             uint8_t *blob = top + data;
 649             struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
 650
 651             for (size_t index(0); index != Swap(super->count); ++index)
 652                 if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
 653                     uint32_t begin = Swap(super->index[index].offset);
 654                     struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
 655                     fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(struct Blob), stdout);
 656                 }
 657         }
 658
 659         if (flag_s) {
 660             _assert(signature != NULL);
 661
 662             uint32_t data = framework.Swap(signature->dataoff);
 663             uint32_t size = framework.Swap(signature->datasize);
 664
 665             uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
 666             uint8_t *blob = top + data;
 667             struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
 668
 669             for (size_t index(0); index != Swap(super->count); ++index)
 670                 if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
 671                     uint32_t begin = Swap(super->index[index].offset);
 672                     struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
 673
 674                     uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + begin + Swap(directory->hashOffset));
 675                     uint32_t pages = Swap(directory->nCodeSlots);
 676
 677                     if (pages != 1)
 678                         for (size_t i = 0; i != pages - 1; ++i)
 679                             sha1(hashes[i], top + 0x1000 * i, 0x1000);
 680                     if (pages != 0)
 681                         sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
 682                 }
 683         }
 684
 685         if (flag_S) {
 686             _assert(signature != NULL);
 687
 688             uint32_t data = framework.Swap(signature->dataoff);
 689             uint32_t size = framework.Swap(signature->datasize);
 690
 691             uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
 692             uint8_t *blob = top + data;
 693             struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
 694             super->blob.magic = Swap(CSMAGIC_EMBEDDED_SIGNATURE);
 695
 696             uint32_t count = xmld == NULL ? 2 : 3;
 697             uint32_t offset = sizeof(struct SuperBlob) + count * sizeof(struct BlobIndex);
 698
 699             super->index[0].type = Swap(CSSLOT_CODEDIRECTORY);
 700             super->index[0].offset = Swap(offset);
 701
 702             uint32_t begin = offset;
 703             struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
 704             offset += sizeof(struct CodeDirectory);
 705
 706             directory->blob.magic = Swap(CSMAGIC_CODEDIRECTORY);
 707             directory->version = Swap(0x00020001);
 708             directory->flags = Swap(0);
 709             directory->codeLimit = Swap(data);
 710             directory->hashSize = 0x14;
 711             directory->hashType = 0x01;
 712             directory->spare1 = 0x00;
 713             directory->pageSize = 0x0c;
 714             directory->spare2 = Swap(0);
 715
 716             directory->identOffset = Swap(offset - begin);
 717             strcpy(reinterpret_cast<char *>(blob + offset), base);
 718             offset += strlen(base) + 1;
 719
 720             uint32_t special = xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS;
 721             directory->nSpecialSlots = Swap(special);
 722
 723             uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + offset);
 724             memset(hashes, 0, sizeof(*hashes) * special);
 725
 726             offset += sizeof(*hashes) * special;
 727             hashes += special;
 728
 729             uint32_t pages = (data + 0x1000 - 1) / 0x1000;
 730             directory->nCodeSlots = Swap(pages);
 731
 732             if (pages != 1)
 733                 for (size_t i = 0; i != pages - 1; ++i)
 734                     sha1(hashes[i], top + 0x1000 * i, 0x1000);
 735             if (pages != 0)
 736                 sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
 737
 738             directory->hashOffset = Swap(offset - begin);
 739             offset += sizeof(*hashes) * pages;
 740             directory->blob.length = Swap(offset - begin);
 741
 742             super->index[1].type = Swap(CSSLOT_REQUIREMENTS);
 743             super->index[1].offset = Swap(offset);
 744
 745             memcpy(blob + offset, "\xfa\xde\x0c\x01\x00\x00\x00\x0c\x00\x00\x00\x00", 0xc);
 746             offset += 0xc;
 747
 748             if (xmld != NULL) {
 749                 super->index[2].type = Swap(CSSLOT_ENTITLEMENTS);
 750                 super->index[2].offset = Swap(offset);
 751
 752                 uint32_t begin = offset;
 753                 struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
 754                 offset += sizeof(struct Blob);
 755
 756                 memcpy(blob + offset, xmld, xmls);
 757                 offset += xmls;
 758
 759                 entitlements->magic = Swap(CSMAGIC_ENTITLEMENTS);
 760                 entitlements->length = Swap(offset - begin);
 761             }
 762
 763             for (size_t index(0); index != count; ++index) {
 764                 uint32_t type = Swap(super->index[index].type);
 765                 if (type != 0 && type <= special) {
 766                     uint32_t offset = Swap(super->index[index].offset);
 767                     struct Blob *local = (struct Blob *) (blob + offset);
 768                     sha1((uint8_t *) (hashes - type), (uint8_t *) local, Swap(local->length));
 769                 }
 770             }
 771
 772             super->count = Swap(count);
 773             super->blob.length = Swap(offset);
 774
 775             if (offset > size) {
 776                 fprintf(stderr, "offset (%u) > size (%u)\n", offset, size);
 777                 _assert(false);
 778             } //else fprintf(stderr, "offset (%zu) <= size (%zu)\n", offset, size);
 779
 780             memset(blob + offset, 0, size - offset);
 781         }
 782
 783         if (temp) {
 784             struct stat info;
 785             _syscall(stat(path, &info));
 786             _syscall(chown(temp, info.st_uid, info.st_gid));
 787             _syscall(chmod(temp, info.st_mode));
 788             _syscall(unlink(path));
 789             _syscall(rename(temp, path));
 790             free(temp);
 791         }
 792
 793         free(dir);
 794         ++filei;
 795     } catch (const char *) {
 796         ++filee;
 797         ++filei;
 798     }
 799
 800     return filee;
 801 }