ldid.cpp

   1 /* ldid - (Mach-O) Link-Loader Identity Editor
   2  * Copyright (C) 2007-2012  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "minimal/stdlib.h"
  23 #include "minimal/mapping.h"
  24
  25 #include <cstring>
  26 #include <string>
  27 #include <vector>
  28
  29 #include <openssl/sha.h>
  30
  31 #include <plist/plist.h>
  32
  33 struct fat_header {
  34     uint32_t magic;
  35     uint32_t nfat_arch;
  36 } _packed;
  37
  38 #define FAT_MAGIC 0xcafebabe
  39 #define FAT_CIGAM 0xbebafeca
  40
  41 struct fat_arch {
  42     uint32_t cputype;
  43     uint32_t cpusubtype;
  44     uint32_t offset;
  45     uint32_t size;
  46     uint32_t align;
  47 } _packed;
  48
  49 struct mach_header {
  50     uint32_t magic;
  51     uint32_t cputype;
  52     uint32_t cpusubtype;
  53     uint32_t filetype;
  54     uint32_t ncmds;
  55     uint32_t sizeofcmds;
  56     uint32_t flags;
  57 } _packed;
  58
  59 #define MH_MAGIC 0xfeedface
  60 #define MH_CIGAM 0xcefaedfe
  61
  62 #define MH_MAGIC_64 0xfeedfacf
  63 #define MH_CIGAM_64 0xcffaedfe
  64
  65 #define MH_DYLDLINK   0x4
  66
  67 #define MH_OBJECT     0x1
  68 #define MH_EXECUTE    0x2
  69 #define MH_DYLIB      0x6
  70 #define MH_BUNDLE     0x8
  71 #define MH_DYLIB_STUB 0x9
  72
  73 struct load_command {
  74     uint32_t cmd;
  75     uint32_t cmdsize;
  76 } _packed;
  77
  78 #define LC_REQ_DYLD           uint32_t(0x80000000)
  79
  80 #define LC_SEGMENT            uint32_t(0x01)
  81 #define LC_SYMTAB             uint32_t(0x02)
  82 #define LC_DYSYMTAB           uint32_t(0x0b)
  83 #define LC_LOAD_DYLIB         uint32_t(0x0c)
  84 #define LC_ID_DYLIB           uint32_t(0x0d)
  85 #define LC_SEGMENT_64         uint32_t(0x19)
  86 #define LC_UUID               uint32_t(0x1b)
  87 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
  88 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
  89 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
  90 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
  91 #define LC_DYLD_INFO          uint32_t(0x22)
  92 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
  93
  94 struct dylib {
  95     uint32_t name;
  96     uint32_t timestamp;
  97     uint32_t current_version;
  98     uint32_t compatibility_version;
  99 } _packed;
 100
 101 struct dylib_command {
 102     uint32_t cmd;
 103     uint32_t cmdsize;
 104     struct dylib dylib;
 105 } _packed;
 106
 107 struct uuid_command {
 108     uint32_t cmd;
 109     uint32_t cmdsize;
 110     uint8_t uuid[16];
 111 } _packed;
 112
 113 struct symtab_command {
 114     uint32_t cmd;
 115     uint32_t cmdsize;
 116     uint32_t symoff;
 117     uint32_t nsyms;
 118     uint32_t stroff;
 119     uint32_t strsize;
 120 } _packed;
 121
 122 struct dyld_info_command {
 123     uint32_t cmd;
 124     uint32_t cmdsize;
 125     uint32_t rebase_off;
 126     uint32_t rebase_size;
 127     uint32_t bind_off;
 128     uint32_t bind_size;
 129     uint32_t weak_bind_off;
 130     uint32_t weak_bind_size;
 131     uint32_t lazy_bind_off;
 132     uint32_t lazy_bind_size;
 133     uint32_t export_off;
 134     uint32_t export_size;
 135 } _packed;
 136
 137 struct dysymtab_command {
 138     uint32_t cmd;
 139     uint32_t cmdsize;
 140     uint32_t ilocalsym;
 141     uint32_t nlocalsym;
 142     uint32_t iextdefsym;
 143     uint32_t nextdefsym;
 144     uint32_t iundefsym;
 145     uint32_t nundefsym;
 146     uint32_t tocoff;
 147     uint32_t ntoc;
 148     uint32_t modtaboff;
 149     uint32_t nmodtab;
 150     uint32_t extrefsymoff;
 151     uint32_t nextrefsyms;
 152     uint32_t indirectsymoff;
 153     uint32_t nindirectsyms;
 154     uint32_t extreloff;
 155     uint32_t nextrel;
 156     uint32_t locreloff;
 157     uint32_t nlocrel;
 158 } _packed;
 159
 160 struct dylib_table_of_contents {
 161     uint32_t symbol_index;
 162     uint32_t module_index;
 163 } _packed;
 164
 165 struct dylib_module {
 166     uint32_t module_name;
 167     uint32_t iextdefsym;
 168     uint32_t nextdefsym;
 169     uint32_t irefsym;
 170     uint32_t nrefsym;
 171     uint32_t ilocalsym;
 172     uint32_t nlocalsym;
 173     uint32_t iextrel;
 174     uint32_t nextrel;
 175     uint32_t iinit_iterm;
 176     uint32_t ninit_nterm;
 177     uint32_t objc_module_info_addr;
 178     uint32_t objc_module_info_size;
 179 } _packed;
 180
 181 struct dylib_reference {
 182     uint32_t isym:24;
 183     uint32_t flags:8;
 184 } _packed;
 185
 186 struct relocation_info {
 187     int32_t r_address;
 188     uint32_t r_symbolnum:24;
 189     uint32_t r_pcrel:1;
 190     uint32_t r_length:2;
 191     uint32_t r_extern:1;
 192     uint32_t r_type:4;
 193 } _packed;
 194
 195 struct nlist {
 196     union {
 197         char *n_name;
 198         int32_t n_strx;
 199     } n_un;
 200
 201     uint8_t n_type;
 202     uint8_t n_sect;
 203     uint8_t n_desc;
 204     uint32_t n_value;
 205 } _packed;
 206
 207 struct segment_command {
 208     uint32_t cmd;
 209     uint32_t cmdsize;
 210     char segname[16];
 211     uint32_t vmaddr;
 212     uint32_t vmsize;
 213     uint32_t fileoff;
 214     uint32_t filesize;
 215     uint32_t maxprot;
 216     uint32_t initprot;
 217     uint32_t nsects;
 218     uint32_t flags;
 219 } _packed;
 220
 221 struct segment_command_64 {
 222     uint32_t cmd;
 223     uint32_t cmdsize;
 224     char segname[16];
 225     uint64_t vmaddr;
 226     uint64_t vmsize;
 227     uint64_t fileoff;
 228     uint64_t filesize;
 229     uint32_t maxprot;
 230     uint32_t initprot;
 231     uint32_t nsects;
 232     uint32_t flags;
 233 } _packed;
 234
 235 struct section {
 236     char sectname[16];
 237     char segname[16];
 238     uint32_t addr;
 239     uint32_t size;
 240     uint32_t offset;
 241     uint32_t align;
 242     uint32_t reloff;
 243     uint32_t nreloc;
 244     uint32_t flags;
 245     uint32_t reserved1;
 246     uint32_t reserved2;
 247 } _packed;
 248
 249 struct section_64 {
 250     char sectname[16];
 251     char segname[16];
 252     uint64_t addr;
 253     uint64_t size;
 254     uint32_t offset;
 255     uint32_t align;
 256     uint32_t reloff;
 257     uint32_t nreloc;
 258     uint32_t flags;
 259     uint32_t reserved1;
 260     uint32_t reserved2;
 261 } _packed;
 262
 263 struct linkedit_data_command {
 264     uint32_t cmd;
 265     uint32_t cmdsize;
 266     uint32_t dataoff;
 267     uint32_t datasize;
 268 } _packed;
 269
 270 struct encryption_info_command {
 271     uint32_t cmd;
 272     uint32_t cmdsize;
 273     uint32_t cryptoff;
 274     uint32_t cryptsize;
 275     uint32_t cryptid;
 276 } _packed;
 277
 278 #define BIND_OPCODE_MASK                             0xf0
 279 #define BIND_IMMEDIATE_MASK                          0x0f
 280 #define BIND_OPCODE_DONE                             0x00
 281 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 282 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 283 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 284 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 285 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 286 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 287 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 288 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 289 #define BIND_OPCODE_DO_BIND                          0x90
 290 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 291 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 292 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 293
 294 template <typename Type_>
 295 Type_ Align(Type_ value, size_t align) {
 296     value += align - 1;
 297     value /= align;
 298     value *= align;
 299     return value;
 300 }
 301
 302 uint16_t Swap_(uint16_t value) {
 303     return
 304         ((value >>  8) & 0x00ff) |
 305         ((value <<  8) & 0xff00);
 306 }
 307
 308 uint32_t Swap_(uint32_t value) {
 309     value = ((value >>  8) & 0x00ff00ff) |
 310             ((value <<  8) & 0xff00ff00);
 311     value = ((value >> 16) & 0x0000ffff) |
 312             ((value << 16) & 0xffff0000);
 313     return value;
 314 }
 315
 316 uint64_t Swap_(uint64_t value) {
 317     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 318     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 319     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 320     return value;
 321 }
 322
 323 int16_t Swap_(int16_t value) {
 324     return Swap_(static_cast<uint16_t>(value));
 325 }
 326
 327 int32_t Swap_(int32_t value) {
 328     return Swap_(static_cast<uint32_t>(value));
 329 }
 330
 331 int64_t Swap_(int64_t value) {
 332     return Swap_(static_cast<uint64_t>(value));
 333 }
 334
 335 bool little_(true);
 336
 337 uint16_t Swap(uint16_t value) {
 338     return little_ ? Swap_(value) : value;
 339 }
 340
 341 uint32_t Swap(uint32_t value) {
 342     return little_ ? Swap_(value) : value;
 343 }
 344
 345 uint64_t Swap(uint64_t value) {
 346     return little_ ? Swap_(value) : value;
 347 }
 348
 349 int16_t Swap(int16_t value) {
 350     return Swap(static_cast<uint16_t>(value));
 351 }
 352
 353 int32_t Swap(int32_t value) {
 354     return Swap(static_cast<uint32_t>(value));
 355 }
 356
 357 int64_t Swap(int64_t value) {
 358     return Swap(static_cast<uint64_t>(value));
 359 }
 360
 361 template <typename Target_>
 362 class Pointer;
 363
 364 class Data {
 365   private:
 366     void *base_;
 367     size_t size_;
 368
 369   protected:
 370     bool swapped_;
 371
 372   public:
 373     Data(void *base, size_t size) :
 374         base_(base),
 375         size_(size),
 376         swapped_(false)
 377     {
 378     }
 379
 380     uint16_t Swap(uint16_t value) const {
 381         return swapped_ ? Swap_(value) : value;
 382     }
 383
 384     uint32_t Swap(uint32_t value) const {
 385         return swapped_ ? Swap_(value) : value;
 386     }
 387
 388     uint64_t Swap(uint64_t value) const {
 389         return swapped_ ? Swap_(value) : value;
 390     }
 391
 392     int16_t Swap(int16_t value) const {
 393         return Swap(static_cast<uint16_t>(value));
 394     }
 395
 396     int32_t Swap(int32_t value) const {
 397         return Swap(static_cast<uint32_t>(value));
 398     }
 399
 400     int64_t Swap(int64_t value) const {
 401         return Swap(static_cast<uint64_t>(value));
 402     }
 403
 404     void *GetBase() const {
 405         return base_;
 406     }
 407
 408     size_t GetSize() const {
 409         return size_;
 410     }
 411 };
 412
 413 class MachHeader :
 414     public Data
 415 {
 416   private:
 417     bool bits64_;
 418
 419     struct mach_header *mach_header_;
 420     struct load_command *load_command_;
 421
 422   public:
 423     MachHeader(void *base, size_t size) :
 424         Data(base, size)
 425     {
 426         mach_header_ = (mach_header *) base;
 427
 428         switch (Swap(mach_header_->magic)) {
 429             case MH_CIGAM:
 430                 swapped_ = !swapped_;
 431             case MH_MAGIC:
 432                 bits64_ = false;
 433             break;
 434
 435             case MH_CIGAM_64:
 436                 swapped_ = !swapped_;
 437             case MH_MAGIC_64:
 438                 bits64_ = true;
 439             break;
 440
 441             default:
 442                 _assert(false);
 443         }
 444
 445         void *post = mach_header_ + 1;
 446         if (bits64_)
 447             post = (uint32_t *) post + 1;
 448         load_command_ = (struct load_command *) post;
 449
 450         _assert(
 451             Swap(mach_header_->filetype) == MH_EXECUTE ||
 452             Swap(mach_header_->filetype) == MH_DYLIB ||
 453             Swap(mach_header_->filetype) == MH_BUNDLE
 454         );
 455     }
 456
 457     struct mach_header *operator ->() const {
 458         return mach_header_;
 459     }
 460
 461     operator struct mach_header *() const {
 462         return mach_header_;
 463     }
 464
 465     uint32_t GetCPUType() const {
 466         return Swap(mach_header_->cputype);
 467     }
 468
 469     uint32_t GetCPUSubtype() const {
 470         return Swap(mach_header_->cpusubtype) & 0xff;
 471     }
 472
 473     struct load_command *GetLoadCommand() const {
 474         return load_command_;
 475     }
 476
 477     std::vector<struct load_command *> GetLoadCommands() const {
 478         std::vector<struct load_command *> load_commands;
 479
 480         struct load_command *load_command = load_command_;
 481         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 482             load_commands.push_back(load_command);
 483             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 484         }
 485
 486         return load_commands;
 487     }
 488
 489     std::vector<segment_command *> GetSegments(const char *segment_name) const {
 490         std::vector<struct segment_command *> segment_commands;
 491
 492         _foreach (load_command, GetLoadCommands()) {
 493             if (Swap(load_command->cmd) == LC_SEGMENT) {
 494                 segment_command *segment_command = reinterpret_cast<struct segment_command *>(load_command);
 495                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 496                     segment_commands.push_back(segment_command);
 497             }
 498         }
 499
 500         return segment_commands;
 501     }
 502
 503     std::vector<segment_command_64 *> GetSegments64(const char *segment_name) const {
 504         std::vector<struct segment_command_64 *> segment_commands;
 505
 506         _foreach (load_command, GetLoadCommands()) {
 507             if (Swap(load_command->cmd) == LC_SEGMENT_64) {
 508                 segment_command_64 *segment_command = reinterpret_cast<struct segment_command_64 *>(load_command);
 509                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 510                     segment_commands.push_back(segment_command);
 511             }
 512         }
 513
 514         return segment_commands;
 515     }
 516
 517     std::vector<section *> GetSections(const char *segment_name, const char *section_name) const {
 518         std::vector<section *> sections;
 519
 520         _foreach (segment, GetSegments(segment_name)) {
 521             section *section = (struct section *) (segment + 1);
 522
 523             uint32_t sect;
 524             for (sect = 0; sect != Swap(segment->nsects); ++sect) {
 525                 if (strncmp(section->sectname, section_name, 16) == 0)
 526                     sections.push_back(section);
 527                 ++section;
 528             }
 529         }
 530
 531         return sections;
 532     }
 533
 534     template <typename Target_>
 535     Pointer<Target_> GetPointer(uint32_t address, const char *segment_name = NULL) const {
 536         load_command *load_command = (struct load_command *) (mach_header_ + 1);
 537         uint32_t cmd;
 538
 539         for (cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 540             if (Swap(load_command->cmd) == LC_SEGMENT) {
 541                 segment_command *segment_command = (struct segment_command *) load_command;
 542                 if (segment_name != NULL && strncmp(segment_command->segname, segment_name, 16) != 0)
 543                     goto next_command;
 544
 545                 section *sections = (struct section *) (segment_command + 1);
 546
 547                 uint32_t sect;
 548                 for (sect = 0; sect != Swap(segment_command->nsects); ++sect) {
 549                     section *section = &sections[sect];
 550                     //printf("%s %u %p %p %u\n", segment_command->segname, sect, address, section->addr, section->size);
 551                     if (address >= Swap(section->addr) && address < Swap(section->addr) + Swap(section->size)) {
 552                         //printf("0x%.8x %s\n", address, segment_command->segname);
 553                         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(address - Swap(section->addr) + Swap(section->offset) + (char *) mach_header_));
 554                     }
 555                 }
 556             }
 557
 558           next_command:
 559             load_command = (struct load_command *) ((char *) load_command + Swap(load_command->cmdsize));
 560         }
 561
 562         return Pointer<Target_>(this);
 563     }
 564
 565     template <typename Target_>
 566     Pointer<Target_> GetOffset(uint32_t offset) {
 567         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_));
 568     }
 569 };
 570
 571 class FatMachHeader :
 572     public MachHeader
 573 {
 574   private:
 575     fat_arch *fat_arch_;
 576
 577   public:
 578     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 579         MachHeader(base, size),
 580         fat_arch_(fat_arch)
 581     {
 582     }
 583
 584     fat_arch *GetFatArch() const {
 585         return fat_arch_;
 586     }
 587 };
 588
 589 class FatHeader :
 590     public Data
 591 {
 592   private:
 593     fat_header *fat_header_;
 594     std::vector<FatMachHeader> mach_headers_;
 595
 596   public:
 597     FatHeader(void *base, size_t size) :
 598         Data(base, size)
 599     {
 600         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 601
 602         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 603             swapped_ = !swapped_;
 604             goto fat;
 605         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 606             fat_header_ = NULL;
 607             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 608         } else fat: {
 609             size_t fat_narch = Swap(fat_header_->nfat_arch);
 610             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 611             size_t arch;
 612             for (arch = 0; arch != fat_narch; ++arch) {
 613                 uint32_t arch_offset = Swap(fat_arch->offset);
 614                 uint32_t arch_size = Swap(fat_arch->size);
 615                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 616                 ++fat_arch;
 617             }
 618         }
 619     }
 620
 621     std::vector<FatMachHeader> &GetMachHeaders() {
 622         return mach_headers_;
 623     }
 624
 625     bool IsFat() const {
 626         return fat_header_ != NULL;
 627     }
 628
 629     struct fat_header *operator ->() const {
 630         return fat_header_;
 631     }
 632
 633     operator struct fat_header *() const {
 634         return fat_header_;
 635     }
 636 };
 637
 638 FatHeader Map(const char *path, bool ro = false) {
 639     size_t size;
 640     void *base(map(path, 0, _not(size_t), &size, ro));
 641     return FatHeader(base, size);
 642 }
 643
 644 template <typename Target_>
 645 class Pointer {
 646   private:
 647     const MachHeader *framework_;
 648     const Target_ *pointer_;
 649
 650   public:
 651     Pointer(const MachHeader *framework = NULL, const Target_ *pointer = NULL) :
 652         framework_(framework),
 653         pointer_(pointer)
 654     {
 655     }
 656
 657     operator const Target_ *() const {
 658         return pointer_;
 659     }
 660
 661     const Target_ *operator ->() const {
 662         return pointer_;
 663     }
 664
 665     Pointer<Target_> &operator ++() {
 666         ++pointer_;
 667         return *this;
 668     }
 669
 670     template <typename Value_>
 671     Value_ Swap(Value_ value) {
 672         return framework_->Swap(value);
 673     }
 674 };
 675
 676 #define CSMAGIC_CODEDIRECTORY      uint32_t(0xfade0c02)
 677 #define CSMAGIC_EMBEDDED_SIGNATURE uint32_t(0xfade0cc0)
 678 #define CSMAGIC_ENTITLEMENTS       uint32_t(0xfade7171)
 679
 680 #define CSSLOT_CODEDIRECTORY uint32_t(0)
 681 #define CSSLOT_REQUIREMENTS  uint32_t(2)
 682 #define CSSLOT_ENTITLEMENTS  uint32_t(5)
 683
 684 struct BlobIndex {
 685     uint32_t type;
 686     uint32_t offset;
 687 } _packed;
 688
 689 struct Blob {
 690     uint32_t magic;
 691     uint32_t length;
 692 } _packed;
 693
 694 struct SuperBlob {
 695     struct Blob blob;
 696     uint32_t count;
 697     struct BlobIndex index[];
 698 } _packed;
 699
 700 struct CodeDirectory {
 701     struct Blob blob;
 702     uint32_t version;
 703     uint32_t flags;
 704     uint32_t hashOffset;
 705     uint32_t identOffset;
 706     uint32_t nSpecialSlots;
 707     uint32_t nCodeSlots;
 708     uint32_t codeLimit;
 709     uint8_t hashSize;
 710     uint8_t hashType;
 711     uint8_t spare1;
 712     uint8_t pageSize;
 713     uint32_t spare2;
 714 } _packed;
 715
 716 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 717
 718 void sha1(uint8_t *hash, uint8_t *data, size_t size) {
 719     SHA1(data, size, hash);
 720 }
 721
 722 struct CodesignAllocation {
 723     FatMachHeader mach_header_;
 724     uint32_t offset_;
 725     uint32_t size_;
 726     uint32_t alloc_;
 727     uint32_t align_;
 728
 729     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t alloc, size_t align) :
 730         mach_header_(mach_header),
 731         offset_(offset),
 732         size_(size),
 733         alloc_(alloc),
 734         align_(align)
 735     {
 736     }
 737 };
 738
 739 int main(int argc, const char *argv[]) {
 740     union {
 741         uint16_t word;
 742         uint8_t byte[2];
 743     } endian = {1};
 744
 745     little_ = endian.byte[0];
 746
 747     bool flag_R(false);
 748     bool flag_r(false);
 749
 750     bool flag_t(false);
 751     bool flag_p(false);
 752     bool flag_u(false);
 753     bool flag_e(false);
 754
 755     bool flag_T(false);
 756
 757     bool flag_S(false);
 758     bool flag_s(false);
 759
 760     bool flag_O(false);
 761
 762     bool flag_D(false);
 763     bool flag_d(false);
 764
 765     bool flag_A(false);
 766     bool flag_a(false);
 767
 768     uint32_t flag_CPUType(_not(uint32_t));
 769     uint32_t flag_CPUSubtype(_not(uint32_t));
 770
 771     const char *flag_I(NULL);
 772
 773     bool timeh(false);
 774     uint32_t timev(0);
 775
 776     const void *xmld(NULL);
 777     size_t xmls(0);
 778
 779     uintptr_t noffset(_not(uintptr_t));
 780     uintptr_t woffset(_not(uintptr_t));
 781
 782     std::vector<std::string> files;
 783
 784     if (argc == 1) {
 785         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
 786         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
 787         fprintf(stderr, "   %s -S cat\n", argv[0]);
 788         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
 789         exit(0);
 790     }
 791
 792     for (int argi(1); argi != argc; ++argi)
 793         if (argv[argi][0] != '-')
 794             files.push_back(argv[argi]);
 795         else switch (argv[argi][1]) {
 796             case 'R': flag_R = true; break;
 797             case 'r': flag_r = true; break;
 798
 799             case 't': flag_t = true; break;
 800             case 'u': flag_u = true; break;
 801             case 'p': flag_p = true; break;
 802             case 'e': flag_e = true; break;
 803             case 'O': flag_O = true; break;
 804
 805             case 'D': flag_D = true; break;
 806             case 'd': flag_d = true; break;
 807
 808             case 'a': flag_a = true; break;
 809
 810             case 'A':
 811                 flag_A = true;
 812                 if (argv[argi][2] != '\0') {
 813                     const char *cpu = argv[argi] + 2;
 814                     const char *colon = strchr(cpu, ':');
 815                     _assert(colon != NULL);
 816                     char *arge;
 817                     flag_CPUType = strtoul(cpu, &arge, 0);
 818                     _assert(arge == colon);
 819                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
 820                     _assert(arge == argv[argi] + strlen(argv[argi]));
 821                 }
 822             break;
 823
 824             case 's':
 825                 _assert(!flag_S);
 826                 flag_s = true;
 827             break;
 828
 829             case 'S':
 830                 _assert(!flag_s);
 831                 flag_S = true;
 832                 if (argv[argi][2] != '\0') {
 833                     const char *xml = argv[argi] + 2;
 834                     xmld = map(xml, 0, _not(size_t), &xmls, true);
 835                 }
 836             break;
 837
 838             case 'T': {
 839                 flag_T = true;
 840                 if (argv[argi][2] == '-')
 841                     timeh = true;
 842                 else {
 843                     char *arge;
 844                     timev = strtoul(argv[argi] + 2, &arge, 0);
 845                     _assert(arge == argv[argi] + strlen(argv[argi]));
 846                 }
 847             } break;
 848
 849             case 'I': {
 850                 flag_I = argv[argi] + 2;
 851             } break;
 852
 853             case 'n': {
 854                 char *arge;
 855                 noffset = strtoul(argv[argi] + 2, &arge, 0);
 856                 _assert(arge == argv[argi] + strlen(argv[argi]));
 857             } break;
 858
 859             case 'w': {
 860                 char *arge;
 861                 woffset = strtoul(argv[argi] + 2, &arge, 0);
 862                 _assert(arge == argv[argi] + strlen(argv[argi]));
 863             } break;
 864
 865             default:
 866                 goto usage;
 867             break;
 868         }
 869
 870     if (files.empty()) usage: {
 871         exit(0);
 872     }
 873
 874     size_t filei(0), filee(0);
 875     _foreach (file, files) try {
 876         const char *path(file.c_str());
 877         const char *base = strrchr(path, '/');
 878
 879         std::string dir;
 880         if (base != NULL)
 881             dir.assign(path, base++ - path + 1);
 882         else
 883             base = path;
 884
 885         const char *name(flag_I ?: base);
 886         char *temp(NULL);
 887
 888         if (flag_r) {
 889             uint32_t clip(0); {
 890                 FatHeader fat_header(Map(path));
 891                 _foreach (mach_header, fat_header.GetMachHeaders()) {
 892                     if (flag_A) {
 893                         if (mach_header.GetCPUType() != flag_CPUType)
 894                             continue;
 895                         if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
 896                             continue;
 897                     }
 898
 899                     mach_header->flags = mach_header.Swap(mach_header.Swap(mach_header->flags) | MH_DYLDLINK);
 900
 901                     uint32_t size(_not(uint32_t)); {
 902                         _foreach (load_command, mach_header.GetLoadCommands()) {
 903                             switch (mach_header.Swap(load_command->cmd)) {
 904                                 case LC_CODE_SIGNATURE: {
 905                                     struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
 906                                     memset(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + mach_header.Swap(signature->dataoff), 0, mach_header.Swap(signature->datasize));
 907                                     memset(signature, 0, sizeof(struct linkedit_data_command));
 908
 909                                     mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) - 1);
 910                                     mach_header->sizeofcmds = mach_header.Swap(uint32_t(mach_header.Swap(mach_header->sizeofcmds) - sizeof(struct linkedit_data_command)));
 911                                 } break;
 912
 913                                 case LC_SYMTAB: {
 914                                     struct symtab_command *symtab = reinterpret_cast<struct symtab_command *>(load_command);
 915                                     size = mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize);
 916                                 } break;
 917                             }
 918                         }
 919                     }
 920
 921                     _assert(size != _not(uint32_t));
 922
 923                     _foreach (segment, mach_header.GetSegments("__LINKEDIT")) {
 924                         segment->filesize -= mach_header.GetSize() - size;
 925
 926                         if (fat_arch *fat_arch = mach_header.GetFatArch()) {
 927                             fat_arch->size = fat_header.Swap(size);
 928                             clip = std::max(clip, fat_header.Swap(fat_arch->offset) + size);
 929                         } else
 930                             clip = std::max(clip, size);
 931                     }
 932
 933                     _foreach (segment, mach_header.GetSegments64("__LINKEDIT")) {
 934                         segment->filesize -= mach_header.GetSize() - size;
 935
 936                         if (fat_arch *fat_arch = mach_header.GetFatArch()) {
 937                             fat_arch->size = fat_header.Swap(size);
 938                             clip = std::max(clip, fat_header.Swap(fat_arch->offset) + size);
 939                         } else
 940                             clip = std::max(clip, size);
 941                     }
 942                 }
 943             }
 944
 945             if (clip != 0)
 946                 _syscall(truncate(path, clip));
 947         }
 948
 949         if (flag_S) {
 950             FatHeader source(Map(path));
 951
 952             size_t offset(0);
 953
 954             if (source.IsFat())
 955                 offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
 956
 957             std::vector<CodesignAllocation> allocations; {
 958                 _foreach (mach_header, source.GetMachHeaders()) {
 959                     if (flag_A) {
 960                         if (mach_header.GetCPUType() != flag_CPUType)
 961                             continue;
 962                         if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
 963                             continue;
 964                     }
 965
 966                     mach_header->flags = mach_header.Swap(mach_header.Swap(mach_header->flags) | MH_DYLDLINK);
 967
 968                     size_t size(_not(size_t)); {
 969                         _foreach (load_command, mach_header.GetLoadCommands()) {
 970                             uint32_t cmd(mach_header.Swap(load_command->cmd));
 971                             if (cmd == LC_CODE_SIGNATURE) {
 972                                 struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
 973                                 size = mach_header.Swap(signature->dataoff);
 974                                 _assert(size < mach_header.GetSize());
 975                                 break;
 976                             }
 977                         }
 978
 979                         if (size == _not(size_t))
 980                             size = mach_header.GetSize();
 981                     }
 982
 983                     size_t alloc(0);
 984                     alloc += sizeof(struct SuperBlob);
 985                     uint32_t special(0);
 986
 987                     special = std::max(special, CSSLOT_CODEDIRECTORY);
 988                     alloc += sizeof(struct BlobIndex);
 989                     alloc += sizeof(struct CodeDirectory);
 990                     alloc += strlen(name) + 1;
 991
 992                     special = std::max(special, CSSLOT_REQUIREMENTS);
 993                     alloc += sizeof(struct BlobIndex);
 994                     alloc += 0xc;
 995
 996                     if (xmld != NULL) {
 997                         special = std::max(special, CSSLOT_ENTITLEMENTS);
 998                         alloc += sizeof(struct BlobIndex);
 999                         alloc += sizeof(struct Blob);
1000                         alloc += xmls;
1001                     }
1002
1003                     size_t normal((size + 0x1000 - 1) / 0x1000);
1004                     alloc = Align(alloc + (special + normal) * 0x14, 16);
1005
1006                     auto *fat_arch(mach_header.GetFatArch());
1007                     uint32_t align(fat_arch == NULL ? 0 : source.Swap(fat_arch->align));
1008                     offset = Align(offset, 1 << align);
1009
1010                     allocations.push_back(CodesignAllocation(mach_header, offset, size, alloc, align));
1011                     offset += size + alloc;
1012                     offset = Align(offset, 16);
1013                 }
1014             }
1015
1016             asprintf(&temp, "%s.%s.cs", dir.c_str(), base);
1017             fclose(fopen(temp, "w+"));
1018             _syscall(truncate(temp, offset));
1019
1020             void *file(map(temp, 0, offset, NULL, false));
1021             memset(file, 0, offset);
1022
1023             fat_arch *fat_arch;
1024             if (!source.IsFat())
1025                 fat_arch = NULL;
1026             else {
1027                 auto *fat_header(reinterpret_cast<struct fat_header *>(file));
1028                 fat_header->magic = Swap(FAT_MAGIC);
1029                 fat_header->nfat_arch = Swap(source.Swap(source->nfat_arch));
1030                 fat_arch = reinterpret_cast<struct fat_arch *>(fat_header + 1);
1031             }
1032
1033             _foreach (allocation, allocations) {
1034                 auto &source(allocation.mach_header_);
1035
1036                 uint32_t align(allocation.size_);
1037                 align = Align(align, 0x10);
1038
1039                 if (fat_arch != NULL) {
1040                     fat_arch->cputype = Swap(source->cputype);
1041                     fat_arch->cpusubtype = Swap(source->cpusubtype);
1042                     fat_arch->offset = Swap(allocation.offset_);
1043                     fat_arch->size = Swap(align + allocation.alloc_);
1044                     fat_arch->align = Swap(allocation.align_);
1045                     ++fat_arch;
1046                 }
1047
1048                 void *target(reinterpret_cast<uint8_t *>(file) + allocation.offset_);
1049                 memcpy(target, source, allocation.size_);
1050                 MachHeader mach_header(target, align + allocation.alloc_);
1051
1052                 struct linkedit_data_command *signature(NULL);
1053                 _foreach (load_command, mach_header.GetLoadCommands()) {
1054                     uint32_t cmd(mach_header.Swap(load_command->cmd));
1055                     if (cmd != LC_CODE_SIGNATURE)
1056                         continue;
1057                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1058                     break;
1059                 }
1060
1061                 if (signature == NULL) {
1062                     mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) + 1);
1063                     signature = reinterpret_cast<struct linkedit_data_command *>(reinterpret_cast<uint8_t *>(mach_header.GetLoadCommand()) + mach_header.Swap(mach_header->sizeofcmds));
1064                     mach_header->sizeofcmds = mach_header.Swap(mach_header.Swap(mach_header->sizeofcmds) + uint32_t(sizeof(*signature)));
1065                     signature->cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1066                     signature->cmdsize = mach_header.Swap(uint32_t(sizeof(*signature)));
1067                 }
1068
1069                 signature->dataoff = mach_header.Swap(align);
1070                 signature->datasize = mach_header.Swap(allocation.alloc_);
1071
1072                 _foreach (segment, mach_header.GetSegments("__LINKEDIT")) {
1073                     size_t size(mach_header.Swap(align + allocation.alloc_ - mach_header.Swap(segment->fileoff)));
1074                     segment->filesize = size;
1075                     segment->vmsize = Align(size, 0x1000);
1076                 }
1077
1078                 _foreach (segment, mach_header.GetSegments64("__LINKEDIT")) {
1079                     size_t size(mach_header.Swap(align + allocation.alloc_ - mach_header.Swap(segment->fileoff)));
1080                     segment->filesize = size;
1081                     segment->vmsize = Align(size, 0x1000);
1082                 }
1083             }
1084         }
1085
1086         if (flag_p)
1087             printf("path%zu='%s'\n", filei, file.c_str());
1088
1089         FatHeader fat_header(Map(temp == NULL ? path : temp, !(flag_R || flag_T || flag_s || flag_S || flag_O || flag_D)));
1090
1091         _foreach (mach_header, fat_header.GetMachHeaders()) {
1092             struct linkedit_data_command *signature(NULL);
1093             struct encryption_info_command *encryption(NULL);
1094
1095             if (flag_A) {
1096                 if (mach_header.GetCPUType() != flag_CPUType)
1097                     continue;
1098                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
1099                     continue;
1100             }
1101
1102             if (flag_a)
1103                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
1104
1105             if (flag_d) {
1106                 if (struct fat_arch *fat_arch = mach_header.GetFatArch())
1107                     printf("offset=0x%x\n", Swap(fat_arch->offset));
1108                 else
1109                     printf("offset=0x0\n");
1110             }
1111
1112             if (woffset != _not(uintptr_t)) {
1113                 Pointer<uint32_t> wvalue(mach_header.GetPointer<uint32_t>(woffset));
1114                 if (wvalue == NULL)
1115                     printf("(null) %p\n", reinterpret_cast<void *>(woffset));
1116                 else
1117                     printf("0x%.08x\n", *wvalue);
1118             }
1119
1120             if (noffset != _not(uintptr_t))
1121                 printf("%s\n", &*mach_header.GetPointer<char>(noffset));
1122
1123             if (flag_d)
1124                 _foreach(segment, mach_header.GetSegments("__TEXT")) {
1125                     printf("vmaddr=0x%x\n", mach_header.Swap(segment->vmaddr));
1126                     printf("fileoff=0x%x\n", mach_header.Swap(segment->fileoff));
1127                 }
1128
1129             if (flag_O) {
1130                 _foreach(section, mach_header.GetSections("__TEXT", "__text"))
1131                     section->addr = mach_header.Swap(0);
1132             }
1133
1134             _foreach (load_command, mach_header.GetLoadCommands()) {
1135                 uint32_t cmd(mach_header.Swap(load_command->cmd));
1136
1137                 if (flag_R && cmd == LC_REEXPORT_DYLIB)
1138                     load_command->cmd = mach_header.Swap(LC_LOAD_DYLIB);
1139                 else if (cmd == LC_CODE_SIGNATURE)
1140                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1141                 else if (cmd == LC_ENCRYPTION_INFO)
1142                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
1143                 else if (cmd == LC_UUID) {
1144                     volatile struct uuid_command *uuid_command(reinterpret_cast<struct uuid_command *>(load_command));
1145
1146                     if (flag_u) {
1147                         printf("uuid%zu=%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x\n", filei,
1148                             uuid_command->uuid[ 0], uuid_command->uuid[ 1], uuid_command->uuid[ 2], uuid_command->uuid[ 3],
1149                             uuid_command->uuid[ 4], uuid_command->uuid[ 5], uuid_command->uuid[ 6], uuid_command->uuid[ 7],
1150                             uuid_command->uuid[ 8], uuid_command->uuid[ 9], uuid_command->uuid[10], uuid_command->uuid[11],
1151                             uuid_command->uuid[12], uuid_command->uuid[13], uuid_command->uuid[14], uuid_command->uuid[15]
1152                         );
1153                     }
1154                 } else if (cmd == LC_ID_DYLIB) {
1155                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
1156
1157                     if (flag_t)
1158                         printf("time%zu=0x%.8x\n", filei, mach_header.Swap(dylib_command->dylib.timestamp));
1159
1160                     if (flag_T) {
1161                         uint32_t timed;
1162
1163                         if (!timeh)
1164                             timed = timev;
1165                         else {
1166                             dylib_command->dylib.timestamp = 0;
1167                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
1168                         }
1169
1170                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
1171                     }
1172                 }
1173             }
1174
1175             if (flag_d) {
1176                 _assert(encryption != NULL);
1177
1178                 printf("cryptoff=0x%x\n", mach_header.Swap(encryption->cryptoff));
1179                 printf("cryptsize=0x%x\n", mach_header.Swap(encryption->cryptsize));
1180                 printf("cryptid=0x%x\n", mach_header.Swap(encryption->cryptid));
1181             }
1182
1183             if (flag_D) {
1184                 _assert(encryption != NULL);
1185                 encryption->cryptid = mach_header.Swap(0);
1186             }
1187
1188             if (flag_e) {
1189                 _assert(signature != NULL);
1190
1191                 uint32_t data = mach_header.Swap(signature->dataoff);
1192
1193                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
1194                 uint8_t *blob = top + data;
1195                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
1196
1197                 for (size_t index(0); index != Swap(super->count); ++index)
1198                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
1199                         uint32_t begin = Swap(super->index[index].offset);
1200                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
1201                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(struct Blob), stdout);
1202                     }
1203             }
1204
1205             if (flag_s) {
1206                 _assert(signature != NULL);
1207
1208                 uint32_t data = mach_header.Swap(signature->dataoff);
1209
1210                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
1211                 uint8_t *blob = top + data;
1212                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
1213
1214                 for (size_t index(0); index != Swap(super->count); ++index)
1215                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
1216                         uint32_t begin = Swap(super->index[index].offset);
1217                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
1218
1219                         uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + begin + Swap(directory->hashOffset));
1220                         uint32_t pages = Swap(directory->nCodeSlots);
1221
1222                         if (pages != 1)
1223                             for (size_t i = 0; i != pages - 1; ++i)
1224                                 sha1(hashes[i], top + 0x1000 * i, 0x1000);
1225                         if (pages != 0)
1226                             sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
1227                     }
1228             }
1229
1230             if (flag_S) {
1231                 _assert(signature != NULL);
1232
1233                 uint32_t data = mach_header.Swap(signature->dataoff);
1234                 uint32_t size = mach_header.Swap(signature->datasize);
1235
1236                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
1237                 uint8_t *blob = top + data;
1238                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
1239                 super->blob.magic = Swap(CSMAGIC_EMBEDDED_SIGNATURE);
1240
1241                 uint32_t count = xmld == NULL ? 2 : 3;
1242                 uint32_t offset = sizeof(struct SuperBlob) + count * sizeof(struct BlobIndex);
1243
1244                 super->index[0].type = Swap(CSSLOT_CODEDIRECTORY);
1245                 super->index[0].offset = Swap(offset);
1246
1247                 uint32_t begin = offset;
1248                 struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
1249                 offset += sizeof(struct CodeDirectory);
1250
1251                 directory->blob.magic = Swap(CSMAGIC_CODEDIRECTORY);
1252                 directory->version = Swap(uint32_t(0x00020001));
1253                 directory->flags = Swap(uint32_t(0));
1254                 directory->codeLimit = Swap(data);
1255                 directory->hashSize = 0x14;
1256                 directory->hashType = 0x01;
1257                 directory->spare1 = 0x00;
1258                 directory->pageSize = 0x0c;
1259                 directory->spare2 = Swap(uint32_t(0));
1260
1261                 directory->identOffset = Swap(offset - begin);
1262                 strcpy(reinterpret_cast<char *>(blob + offset), name);
1263                 offset += strlen(name) + 1;
1264
1265                 uint32_t special = xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS;
1266                 directory->nSpecialSlots = Swap(special);
1267
1268                 uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + offset);
1269                 memset(hashes, 0, sizeof(*hashes) * special);
1270
1271                 offset += sizeof(*hashes) * special;
1272                 hashes += special;
1273
1274                 uint32_t pages = (data + 0x1000 - 1) / 0x1000;
1275                 directory->nCodeSlots = Swap(pages);
1276
1277                 if (pages != 1)
1278                     for (size_t i = 0; i != pages - 1; ++i)
1279                         sha1(hashes[i], top + 0x1000 * i, 0x1000);
1280                 if (pages != 0)
1281                     sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
1282
1283                 directory->hashOffset = Swap(offset - begin);
1284                 offset += sizeof(*hashes) * pages;
1285                 directory->blob.length = Swap(offset - begin);
1286
1287                 super->index[1].type = Swap(CSSLOT_REQUIREMENTS);
1288                 super->index[1].offset = Swap(offset);
1289
1290                 memcpy(blob + offset, "\xfa\xde\x0c\x01\x00\x00\x00\x0c\x00\x00\x00\x00", 0xc);
1291                 offset += 0xc;
1292
1293                 if (xmld != NULL) {
1294                     super->index[2].type = Swap(CSSLOT_ENTITLEMENTS);
1295                     super->index[2].offset = Swap(offset);
1296
1297                     uint32_t begin = offset;
1298                     struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
1299                     offset += sizeof(struct Blob);
1300
1301                     memcpy(blob + offset, xmld, xmls);
1302                     offset += xmls;
1303
1304                     entitlements->magic = Swap(CSMAGIC_ENTITLEMENTS);
1305                     entitlements->length = Swap(offset - begin);
1306                 }
1307
1308                 for (size_t index(0); index != count; ++index) {
1309                     uint32_t type = Swap(super->index[index].type);
1310                     if (type != 0 && type <= special) {
1311                         uint32_t offset = Swap(super->index[index].offset);
1312                         struct Blob *local = (struct Blob *) (blob + offset);
1313                         sha1((uint8_t *) (hashes - type), (uint8_t *) local, Swap(local->length));
1314                     }
1315                 }
1316
1317                 super->count = Swap(count);
1318                 super->blob.length = Swap(offset);
1319
1320                 if (offset > size) {
1321                     fprintf(stderr, "offset (%u) > size (%u)\n", offset, size);
1322                     _assert(false);
1323                 } //else fprintf(stderr, "offset (%zu) <= size (%zu)\n", offset, size);
1324
1325                 memset(blob + offset, 0, size - offset);
1326             }
1327         }
1328
1329         if (flag_S) {
1330             uint8_t *top = reinterpret_cast<uint8_t *>(fat_header.GetBase());
1331             size_t size = fat_header.GetSize();
1332
1333             char *copy;
1334             asprintf(&copy, "%s.%s.cp", dir.c_str(), base);
1335             FILE *file = fopen(copy, "w+");
1336             size_t writ = fwrite(top, 1, size, file);
1337             _assert(writ == size);
1338             fclose(file);
1339
1340             _syscall(unlink(temp));
1341             free(temp);
1342             temp = copy;
1343         }
1344
1345         if (temp != NULL) {
1346             struct stat info;
1347             _syscall(stat(path, &info));
1348             _syscall(chown(temp, info.st_uid, info.st_gid));
1349             _syscall(chmod(temp, info.st_mode));
1350             _syscall(unlink(path));
1351             _syscall(rename(temp, path));
1352             free(temp);
1353         }
1354
1355         ++filei;
1356     } catch (const char *) {
1357         ++filee;
1358         ++filei;
1359     }
1360
1361     return filee;
1362 }