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
  24 #include <cstring>
  25 #include <string>
  26 #include <vector>
  27
  28 #include <dlfcn.h>
  29 #include <fcntl.h>
  30
  31 #include <sys/mman.h>
  32 #include <sys/stat.h>
  33
  34 #include <openssl/sha.h>
  35
  36 #include <plist/plist.h>
  37
  38 struct fat_header {
  39     uint32_t magic;
  40     uint32_t nfat_arch;
  41 } _packed;
  42
  43 #define FAT_MAGIC 0xcafebabe
  44 #define FAT_CIGAM 0xbebafeca
  45
  46 struct fat_arch {
  47     uint32_t cputype;
  48     uint32_t cpusubtype;
  49     uint32_t offset;
  50     uint32_t size;
  51     uint32_t align;
  52 } _packed;
  53
  54 struct mach_header {
  55     uint32_t magic;
  56     uint32_t cputype;
  57     uint32_t cpusubtype;
  58     uint32_t filetype;
  59     uint32_t ncmds;
  60     uint32_t sizeofcmds;
  61     uint32_t flags;
  62 } _packed;
  63
  64 #define MH_MAGIC 0xfeedface
  65 #define MH_CIGAM 0xcefaedfe
  66
  67 #define MH_MAGIC_64 0xfeedfacf
  68 #define MH_CIGAM_64 0xcffaedfe
  69
  70 #define MH_DYLDLINK   0x4
  71
  72 #define MH_OBJECT     0x1
  73 #define MH_EXECUTE    0x2
  74 #define MH_DYLIB      0x6
  75 #define MH_BUNDLE     0x8
  76 #define MH_DYLIB_STUB 0x9
  77
  78 struct load_command {
  79     uint32_t cmd;
  80     uint32_t cmdsize;
  81 } _packed;
  82
  83 #define LC_REQ_DYLD           uint32_t(0x80000000)
  84
  85 #define LC_SEGMENT            uint32_t(0x01)
  86 #define LC_SYMTAB             uint32_t(0x02)
  87 #define LC_DYSYMTAB           uint32_t(0x0b)
  88 #define LC_LOAD_DYLIB         uint32_t(0x0c)
  89 #define LC_ID_DYLIB           uint32_t(0x0d)
  90 #define LC_SEGMENT_64         uint32_t(0x19)
  91 #define LC_UUID               uint32_t(0x1b)
  92 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
  93 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
  94 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
  95 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
  96 #define LC_DYLD_INFO          uint32_t(0x22)
  97 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
  98
  99 struct dylib {
 100     uint32_t name;
 101     uint32_t timestamp;
 102     uint32_t current_version;
 103     uint32_t compatibility_version;
 104 } _packed;
 105
 106 struct dylib_command {
 107     uint32_t cmd;
 108     uint32_t cmdsize;
 109     struct dylib dylib;
 110 } _packed;
 111
 112 struct uuid_command {
 113     uint32_t cmd;
 114     uint32_t cmdsize;
 115     uint8_t uuid[16];
 116 } _packed;
 117
 118 struct symtab_command {
 119     uint32_t cmd;
 120     uint32_t cmdsize;
 121     uint32_t symoff;
 122     uint32_t nsyms;
 123     uint32_t stroff;
 124     uint32_t strsize;
 125 } _packed;
 126
 127 struct dyld_info_command {
 128     uint32_t cmd;
 129     uint32_t cmdsize;
 130     uint32_t rebase_off;
 131     uint32_t rebase_size;
 132     uint32_t bind_off;
 133     uint32_t bind_size;
 134     uint32_t weak_bind_off;
 135     uint32_t weak_bind_size;
 136     uint32_t lazy_bind_off;
 137     uint32_t lazy_bind_size;
 138     uint32_t export_off;
 139     uint32_t export_size;
 140 } _packed;
 141
 142 struct dysymtab_command {
 143     uint32_t cmd;
 144     uint32_t cmdsize;
 145     uint32_t ilocalsym;
 146     uint32_t nlocalsym;
 147     uint32_t iextdefsym;
 148     uint32_t nextdefsym;
 149     uint32_t iundefsym;
 150     uint32_t nundefsym;
 151     uint32_t tocoff;
 152     uint32_t ntoc;
 153     uint32_t modtaboff;
 154     uint32_t nmodtab;
 155     uint32_t extrefsymoff;
 156     uint32_t nextrefsyms;
 157     uint32_t indirectsymoff;
 158     uint32_t nindirectsyms;
 159     uint32_t extreloff;
 160     uint32_t nextrel;
 161     uint32_t locreloff;
 162     uint32_t nlocrel;
 163 } _packed;
 164
 165 struct dylib_table_of_contents {
 166     uint32_t symbol_index;
 167     uint32_t module_index;
 168 } _packed;
 169
 170 struct dylib_module {
 171     uint32_t module_name;
 172     uint32_t iextdefsym;
 173     uint32_t nextdefsym;
 174     uint32_t irefsym;
 175     uint32_t nrefsym;
 176     uint32_t ilocalsym;
 177     uint32_t nlocalsym;
 178     uint32_t iextrel;
 179     uint32_t nextrel;
 180     uint32_t iinit_iterm;
 181     uint32_t ninit_nterm;
 182     uint32_t objc_module_info_addr;
 183     uint32_t objc_module_info_size;
 184 } _packed;
 185
 186 struct dylib_reference {
 187     uint32_t isym:24;
 188     uint32_t flags:8;
 189 } _packed;
 190
 191 struct relocation_info {
 192     int32_t r_address;
 193     uint32_t r_symbolnum:24;
 194     uint32_t r_pcrel:1;
 195     uint32_t r_length:2;
 196     uint32_t r_extern:1;
 197     uint32_t r_type:4;
 198 } _packed;
 199
 200 struct nlist {
 201     union {
 202         char *n_name;
 203         int32_t n_strx;
 204     } n_un;
 205
 206     uint8_t n_type;
 207     uint8_t n_sect;
 208     uint8_t n_desc;
 209     uint32_t n_value;
 210 } _packed;
 211
 212 struct segment_command {
 213     uint32_t cmd;
 214     uint32_t cmdsize;
 215     char segname[16];
 216     uint32_t vmaddr;
 217     uint32_t vmsize;
 218     uint32_t fileoff;
 219     uint32_t filesize;
 220     uint32_t maxprot;
 221     uint32_t initprot;
 222     uint32_t nsects;
 223     uint32_t flags;
 224 } _packed;
 225
 226 struct segment_command_64 {
 227     uint32_t cmd;
 228     uint32_t cmdsize;
 229     char segname[16];
 230     uint64_t vmaddr;
 231     uint64_t vmsize;
 232     uint64_t fileoff;
 233     uint64_t filesize;
 234     uint32_t maxprot;
 235     uint32_t initprot;
 236     uint32_t nsects;
 237     uint32_t flags;
 238 } _packed;
 239
 240 struct section {
 241     char sectname[16];
 242     char segname[16];
 243     uint32_t addr;
 244     uint32_t size;
 245     uint32_t offset;
 246     uint32_t align;
 247     uint32_t reloff;
 248     uint32_t nreloc;
 249     uint32_t flags;
 250     uint32_t reserved1;
 251     uint32_t reserved2;
 252 } _packed;
 253
 254 struct section_64 {
 255     char sectname[16];
 256     char segname[16];
 257     uint64_t addr;
 258     uint64_t size;
 259     uint32_t offset;
 260     uint32_t align;
 261     uint32_t reloff;
 262     uint32_t nreloc;
 263     uint32_t flags;
 264     uint32_t reserved1;
 265     uint32_t reserved2;
 266 } _packed;
 267
 268 struct linkedit_data_command {
 269     uint32_t cmd;
 270     uint32_t cmdsize;
 271     uint32_t dataoff;
 272     uint32_t datasize;
 273 } _packed;
 274
 275 struct encryption_info_command {
 276     uint32_t cmd;
 277     uint32_t cmdsize;
 278     uint32_t cryptoff;
 279     uint32_t cryptsize;
 280     uint32_t cryptid;
 281 } _packed;
 282
 283 #define BIND_OPCODE_MASK                             0xf0
 284 #define BIND_IMMEDIATE_MASK                          0x0f
 285 #define BIND_OPCODE_DONE                             0x00
 286 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 287 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 288 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 289 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 290 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 291 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 292 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 293 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 294 #define BIND_OPCODE_DO_BIND                          0x90
 295 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 296 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 297 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 298
 299 template <typename Type_>
 300 Type_ Align(Type_ value, size_t align) {
 301     value += align - 1;
 302     value /= align;
 303     value *= align;
 304     return value;
 305 }
 306
 307 uint16_t Swap_(uint16_t value) {
 308     return
 309         ((value >>  8) & 0x00ff) |
 310         ((value <<  8) & 0xff00);
 311 }
 312
 313 uint32_t Swap_(uint32_t value) {
 314     value = ((value >>  8) & 0x00ff00ff) |
 315             ((value <<  8) & 0xff00ff00);
 316     value = ((value >> 16) & 0x0000ffff) |
 317             ((value << 16) & 0xffff0000);
 318     return value;
 319 }
 320
 321 uint64_t Swap_(uint64_t value) {
 322     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 323     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 324     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 325     return value;
 326 }
 327
 328 int16_t Swap_(int16_t value) {
 329     return Swap_(static_cast<uint16_t>(value));
 330 }
 331
 332 int32_t Swap_(int32_t value) {
 333     return Swap_(static_cast<uint32_t>(value));
 334 }
 335
 336 int64_t Swap_(int64_t value) {
 337     return Swap_(static_cast<uint64_t>(value));
 338 }
 339
 340 bool little_(true);
 341
 342 uint16_t Swap(uint16_t value) {
 343     return little_ ? Swap_(value) : value;
 344 }
 345
 346 uint32_t Swap(uint32_t value) {
 347     return little_ ? Swap_(value) : value;
 348 }
 349
 350 uint64_t Swap(uint64_t value) {
 351     return little_ ? Swap_(value) : value;
 352 }
 353
 354 int16_t Swap(int16_t value) {
 355     return Swap(static_cast<uint16_t>(value));
 356 }
 357
 358 int32_t Swap(int32_t value) {
 359     return Swap(static_cast<uint32_t>(value));
 360 }
 361
 362 int64_t Swap(int64_t value) {
 363     return Swap(static_cast<uint64_t>(value));
 364 }
 365
 366 template <typename Target_>
 367 class Pointer;
 368
 369 class Data {
 370   private:
 371     void *base_;
 372     size_t size_;
 373
 374   protected:
 375     bool swapped_;
 376
 377   public:
 378     Data(void *base, size_t size) :
 379         base_(base),
 380         size_(size),
 381         swapped_(false)
 382     {
 383     }
 384
 385     uint16_t Swap(uint16_t value) const {
 386         return swapped_ ? Swap_(value) : value;
 387     }
 388
 389     uint32_t Swap(uint32_t value) const {
 390         return swapped_ ? Swap_(value) : value;
 391     }
 392
 393     uint64_t Swap(uint64_t value) const {
 394         return swapped_ ? Swap_(value) : value;
 395     }
 396
 397     int16_t Swap(int16_t value) const {
 398         return Swap(static_cast<uint16_t>(value));
 399     }
 400
 401     int32_t Swap(int32_t value) const {
 402         return Swap(static_cast<uint32_t>(value));
 403     }
 404
 405     int64_t Swap(int64_t value) const {
 406         return Swap(static_cast<uint64_t>(value));
 407     }
 408
 409     void *GetBase() const {
 410         return base_;
 411     }
 412
 413     size_t GetSize() const {
 414         return size_;
 415     }
 416 };
 417
 418 class MachHeader :
 419     public Data
 420 {
 421   private:
 422     bool bits64_;
 423
 424     struct mach_header *mach_header_;
 425     struct load_command *load_command_;
 426
 427   public:
 428     MachHeader(void *base, size_t size) :
 429         Data(base, size)
 430     {
 431         mach_header_ = (mach_header *) base;
 432
 433         switch (Swap(mach_header_->magic)) {
 434             case MH_CIGAM:
 435                 swapped_ = !swapped_;
 436             case MH_MAGIC:
 437                 bits64_ = false;
 438             break;
 439
 440             case MH_CIGAM_64:
 441                 swapped_ = !swapped_;
 442             case MH_MAGIC_64:
 443                 bits64_ = true;
 444             break;
 445
 446             default:
 447                 _assert(false);
 448         }
 449
 450         void *post = mach_header_ + 1;
 451         if (bits64_)
 452             post = (uint32_t *) post + 1;
 453         load_command_ = (struct load_command *) post;
 454
 455         _assert(
 456             Swap(mach_header_->filetype) == MH_EXECUTE ||
 457             Swap(mach_header_->filetype) == MH_DYLIB ||
 458             Swap(mach_header_->filetype) == MH_BUNDLE
 459         );
 460     }
 461
 462     struct mach_header *operator ->() const {
 463         return mach_header_;
 464     }
 465
 466     operator struct mach_header *() const {
 467         return mach_header_;
 468     }
 469
 470     uint32_t GetCPUType() const {
 471         return Swap(mach_header_->cputype);
 472     }
 473
 474     uint32_t GetCPUSubtype() const {
 475         return Swap(mach_header_->cpusubtype) & 0xff;
 476     }
 477
 478     struct load_command *GetLoadCommand() const {
 479         return load_command_;
 480     }
 481
 482     std::vector<struct load_command *> GetLoadCommands() const {
 483         std::vector<struct load_command *> load_commands;
 484
 485         struct load_command *load_command = load_command_;
 486         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 487             load_commands.push_back(load_command);
 488             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 489         }
 490
 491         return load_commands;
 492     }
 493
 494     std::vector<segment_command *> GetSegments(const char *segment_name) const {
 495         std::vector<struct segment_command *> segment_commands;
 496
 497         _foreach (load_command, GetLoadCommands()) {
 498             if (Swap(load_command->cmd) == LC_SEGMENT) {
 499                 segment_command *segment_command = reinterpret_cast<struct segment_command *>(load_command);
 500                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 501                     segment_commands.push_back(segment_command);
 502             }
 503         }
 504
 505         return segment_commands;
 506     }
 507
 508     std::vector<segment_command_64 *> GetSegments64(const char *segment_name) const {
 509         std::vector<struct segment_command_64 *> segment_commands;
 510
 511         _foreach (load_command, GetLoadCommands()) {
 512             if (Swap(load_command->cmd) == LC_SEGMENT_64) {
 513                 segment_command_64 *segment_command = reinterpret_cast<struct segment_command_64 *>(load_command);
 514                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 515                     segment_commands.push_back(segment_command);
 516             }
 517         }
 518
 519         return segment_commands;
 520     }
 521
 522     std::vector<section *> GetSections(const char *segment_name, const char *section_name) const {
 523         std::vector<section *> sections;
 524
 525         _foreach (segment, GetSegments(segment_name)) {
 526             section *section = (struct section *) (segment + 1);
 527
 528             uint32_t sect;
 529             for (sect = 0; sect != Swap(segment->nsects); ++sect) {
 530                 if (strncmp(section->sectname, section_name, 16) == 0)
 531                     sections.push_back(section);
 532                 ++section;
 533             }
 534         }
 535
 536         return sections;
 537     }
 538
 539     template <typename Target_>
 540     Pointer<Target_> GetPointer(uint32_t address, const char *segment_name = NULL) const {
 541         load_command *load_command = (struct load_command *) (mach_header_ + 1);
 542         uint32_t cmd;
 543
 544         for (cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 545             if (Swap(load_command->cmd) == LC_SEGMENT) {
 546                 segment_command *segment_command = (struct segment_command *) load_command;
 547                 if (segment_name != NULL && strncmp(segment_command->segname, segment_name, 16) != 0)
 548                     goto next_command;
 549
 550                 section *sections = (struct section *) (segment_command + 1);
 551
 552                 uint32_t sect;
 553                 for (sect = 0; sect != Swap(segment_command->nsects); ++sect) {
 554                     section *section = &sections[sect];
 555                     //printf("%s %u %p %p %u\n", segment_command->segname, sect, address, section->addr, section->size);
 556                     if (address >= Swap(section->addr) && address < Swap(section->addr) + Swap(section->size)) {
 557                         //printf("0x%.8x %s\n", address, segment_command->segname);
 558                         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(address - Swap(section->addr) + Swap(section->offset) + (char *) mach_header_));
 559                     }
 560                 }
 561             }
 562
 563           next_command:
 564             load_command = (struct load_command *) ((char *) load_command + Swap(load_command->cmdsize));
 565         }
 566
 567         return Pointer<Target_>(this);
 568     }
 569
 570     template <typename Target_>
 571     Pointer<Target_> GetOffset(uint32_t offset) {
 572         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_));
 573     }
 574 };
 575
 576 class FatMachHeader :
 577     public MachHeader
 578 {
 579   private:
 580     fat_arch *fat_arch_;
 581
 582   public:
 583     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 584         MachHeader(base, size),
 585         fat_arch_(fat_arch)
 586     {
 587     }
 588
 589     fat_arch *GetFatArch() const {
 590         return fat_arch_;
 591     }
 592 };
 593
 594 class FatHeader :
 595     public Data
 596 {
 597   private:
 598     fat_header *fat_header_;
 599     std::vector<FatMachHeader> mach_headers_;
 600
 601   public:
 602     FatHeader(void *base, size_t size) :
 603         Data(base, size)
 604     {
 605         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 606
 607         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 608             swapped_ = !swapped_;
 609             goto fat;
 610         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 611             fat_header_ = NULL;
 612             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 613         } else fat: {
 614             size_t fat_narch = Swap(fat_header_->nfat_arch);
 615             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 616             size_t arch;
 617             for (arch = 0; arch != fat_narch; ++arch) {
 618                 uint32_t arch_offset = Swap(fat_arch->offset);
 619                 uint32_t arch_size = Swap(fat_arch->size);
 620                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 621                 ++fat_arch;
 622             }
 623         }
 624     }
 625
 626     std::vector<FatMachHeader> &GetMachHeaders() {
 627         return mach_headers_;
 628     }
 629
 630     bool IsFat() const {
 631         return fat_header_ != NULL;
 632     }
 633
 634     struct fat_header *operator ->() const {
 635         return fat_header_;
 636     }
 637
 638     operator struct fat_header *() const {
 639         return fat_header_;
 640     }
 641 };
 642
 643 template <typename Target_>
 644 class Pointer {
 645   private:
 646     const MachHeader *framework_;
 647     const Target_ *pointer_;
 648
 649   public:
 650     Pointer(const MachHeader *framework = NULL, const Target_ *pointer = NULL) :
 651         framework_(framework),
 652         pointer_(pointer)
 653     {
 654     }
 655
 656     operator const Target_ *() const {
 657         return pointer_;
 658     }
 659
 660     const Target_ *operator ->() const {
 661         return pointer_;
 662     }
 663
 664     Pointer<Target_> &operator ++() {
 665         ++pointer_;
 666         return *this;
 667     }
 668
 669     template <typename Value_>
 670     Value_ Swap(Value_ value) {
 671         return framework_->Swap(value);
 672     }
 673 };
 674
 675 #define CSMAGIC_CODEDIRECTORY      uint32_t(0xfade0c02)
 676 #define CSMAGIC_EMBEDDED_SIGNATURE uint32_t(0xfade0cc0)
 677 #define CSMAGIC_ENTITLEMENTS       uint32_t(0xfade7171)
 678
 679 #define CSSLOT_CODEDIRECTORY uint32_t(0)
 680 #define CSSLOT_REQUIREMENTS  uint32_t(2)
 681 #define CSSLOT_ENTITLEMENTS  uint32_t(5)
 682
 683 struct BlobIndex {
 684     uint32_t type;
 685     uint32_t offset;
 686 } _packed;
 687
 688 struct Blob {
 689     uint32_t magic;
 690     uint32_t length;
 691 } _packed;
 692
 693 struct SuperBlob {
 694     struct Blob blob;
 695     uint32_t count;
 696     struct BlobIndex index[];
 697 } _packed;
 698
 699 struct CodeDirectory {
 700     struct Blob blob;
 701     uint32_t version;
 702     uint32_t flags;
 703     uint32_t hashOffset;
 704     uint32_t identOffset;
 705     uint32_t nSpecialSlots;
 706     uint32_t nCodeSlots;
 707     uint32_t codeLimit;
 708     uint8_t hashSize;
 709     uint8_t hashType;
 710     uint8_t spare1;
 711     uint8_t pageSize;
 712     uint32_t spare2;
 713 } _packed;
 714
 715 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 716
 717 void sha1(uint8_t *hash, uint8_t *data, size_t size) {
 718     SHA1(data, size, hash);
 719 }
 720
 721 struct CodesignAllocation {
 722     FatMachHeader mach_header_;
 723     uint32_t offset_;
 724     uint32_t size_;
 725     uint32_t alloc_;
 726     uint32_t align_;
 727
 728     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t alloc, size_t align) :
 729         mach_header_(mach_header),
 730         offset_(offset),
 731         size_(size),
 732         alloc_(alloc),
 733         align_(align)
 734     {
 735     }
 736 };
 737
 738 class File {
 739   private:
 740     int file_;
 741
 742   public:
 743     File() :
 744         file_(-1)
 745     {
 746     }
 747
 748     ~File() {
 749         if (file_ != -1)
 750             _syscall(close(file_));
 751     }
 752
 753     void open(const char *path, bool ro) {
 754         _assert(file_ == -1);
 755         _syscall(file_ = ::open(path, ro ? O_RDONLY : O_RDWR));
 756     }
 757
 758     int file() const {
 759         return file_;
 760     }
 761 };
 762
 763 class Map {
 764   private:
 765     File file_;
 766     void *data_;
 767     size_t size_;
 768
 769     void clear() {
 770         if (data_ == NULL)
 771             return;
 772         _syscall(munmap(data_, size_));
 773         data_ = NULL;
 774         size_ = 0;
 775     }
 776
 777   public:
 778     Map() :
 779         data_(NULL),
 780         size_(0)
 781     {
 782     }
 783
 784     Map(const char *path, bool ro) {
 785         open(path, ro);
 786     }
 787
 788     ~Map() {
 789         clear();
 790     }
 791
 792     void open(const char *path, bool ro) {
 793         clear();
 794
 795         file_.open(path, ro);
 796         int file(file_.file());
 797
 798         struct stat stat;
 799         _syscall(fstat(file, &stat));
 800         size_ = stat.st_size;
 801
 802         _syscall(data_ = mmap(NULL, size_, ro ? PROT_READ : PROT_READ | PROT_WRITE, ro ? MAP_PRIVATE : MAP_SHARED, file, 0));
 803     }
 804
 805     void *data() const {
 806         return data_;
 807     }
 808
 809     size_t size() const {
 810         return size_;
 811     }
 812 };
 813
 814 int main(int argc, const char *argv[]) {
 815     union {
 816         uint16_t word;
 817         uint8_t byte[2];
 818     } endian = {1};
 819
 820     little_ = endian.byte[0];
 821
 822     bool flag_R(false);
 823     bool flag_r(false);
 824
 825     bool flag_t(false);
 826     bool flag_p(false);
 827     bool flag_u(false);
 828     bool flag_e(false);
 829
 830     bool flag_T(false);
 831
 832     bool flag_S(false);
 833     bool flag_s(false);
 834
 835     bool flag_O(false);
 836
 837     bool flag_D(false);
 838     bool flag_d(false);
 839
 840     bool flag_A(false);
 841     bool flag_a(false);
 842
 843     uint32_t flag_CPUType(_not(uint32_t));
 844     uint32_t flag_CPUSubtype(_not(uint32_t));
 845
 846     const char *flag_I(NULL);
 847
 848     bool timeh(false);
 849     uint32_t timev(0);
 850
 851     Map xmlm;
 852     const void *xmld(NULL);
 853     size_t xmls(0);
 854
 855     uintptr_t noffset(_not(uintptr_t));
 856     uintptr_t woffset(_not(uintptr_t));
 857
 858     std::vector<std::string> files;
 859
 860     if (argc == 1) {
 861         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
 862         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
 863         fprintf(stderr, "   %s -S cat\n", argv[0]);
 864         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
 865         exit(0);
 866     }
 867
 868     for (int argi(1); argi != argc; ++argi)
 869         if (argv[argi][0] != '-')
 870             files.push_back(argv[argi]);
 871         else switch (argv[argi][1]) {
 872             case 'R': flag_R = true; break;
 873             case 'r': flag_r = true; break;
 874
 875             case 't': flag_t = true; break;
 876             case 'u': flag_u = true; break;
 877             case 'p': flag_p = true; break;
 878             case 'e': flag_e = true; break;
 879             case 'O': flag_O = true; break;
 880
 881             case 'D': flag_D = true; break;
 882             case 'd': flag_d = true; break;
 883
 884             case 'a': flag_a = true; break;
 885
 886             case 'A':
 887                 flag_A = true;
 888                 if (argv[argi][2] != '\0') {
 889                     const char *cpu = argv[argi] + 2;
 890                     const char *colon = strchr(cpu, ':');
 891                     _assert(colon != NULL);
 892                     char *arge;
 893                     flag_CPUType = strtoul(cpu, &arge, 0);
 894                     _assert(arge == colon);
 895                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
 896                     _assert(arge == argv[argi] + strlen(argv[argi]));
 897                 }
 898             break;
 899
 900             case 's':
 901                 _assert(!flag_S);
 902                 flag_s = true;
 903             break;
 904
 905             case 'S':
 906                 _assert(!flag_s);
 907                 flag_S = true;
 908                 if (argv[argi][2] != '\0') {
 909                     const char *xml = argv[argi] + 2;
 910                     xmlm.open(xml, true);
 911                     xmld = xmlm.data();
 912                     xmls = xmlm.size();
 913                 }
 914             break;
 915
 916             case 'T': {
 917                 flag_T = true;
 918                 if (argv[argi][2] == '-')
 919                     timeh = true;
 920                 else {
 921                     char *arge;
 922                     timev = strtoul(argv[argi] + 2, &arge, 0);
 923                     _assert(arge == argv[argi] + strlen(argv[argi]));
 924                 }
 925             } break;
 926
 927             case 'I': {
 928                 flag_I = argv[argi] + 2;
 929             } break;
 930
 931             case 'n': {
 932                 char *arge;
 933                 noffset = strtoul(argv[argi] + 2, &arge, 0);
 934                 _assert(arge == argv[argi] + strlen(argv[argi]));
 935             } break;
 936
 937             case 'w': {
 938                 char *arge;
 939                 woffset = strtoul(argv[argi] + 2, &arge, 0);
 940                 _assert(arge == argv[argi] + strlen(argv[argi]));
 941             } break;
 942
 943             default:
 944                 goto usage;
 945             break;
 946         }
 947
 948     if (files.empty()) usage: {
 949         exit(0);
 950     }
 951
 952     size_t filei(0), filee(0);
 953     _foreach (file, files) try {
 954         const char *path(file.c_str());
 955         const char *base = strrchr(path, '/');
 956
 957         std::string dir;
 958         if (base != NULL)
 959             dir.assign(path, base++ - path + 1);
 960         else
 961             base = path;
 962
 963         const char *name(flag_I ?: base);
 964         char *temp(NULL);
 965
 966         if (flag_r) {
 967             uint32_t clip(0); {
 968                 Map mapping(path, false);
 969                 FatHeader fat_header(mapping.data(), mapping.size());
 970                 _foreach (mach_header, fat_header.GetMachHeaders()) {
 971                     if (flag_A) {
 972                         if (mach_header.GetCPUType() != flag_CPUType)
 973                             continue;
 974                         if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
 975                             continue;
 976                     }
 977
 978                     mach_header->flags = mach_header.Swap(mach_header.Swap(mach_header->flags) | MH_DYLDLINK);
 979
 980                     uint32_t size(_not(uint32_t)); {
 981                         _foreach (load_command, mach_header.GetLoadCommands()) {
 982                             switch (mach_header.Swap(load_command->cmd)) {
 983                                 case LC_CODE_SIGNATURE: {
 984                                     struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
 985                                     memset(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + mach_header.Swap(signature->dataoff), 0, mach_header.Swap(signature->datasize));
 986                                     memset(signature, 0, sizeof(struct linkedit_data_command));
 987
 988                                     mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) - 1);
 989                                     mach_header->sizeofcmds = mach_header.Swap(uint32_t(mach_header.Swap(mach_header->sizeofcmds) - sizeof(struct linkedit_data_command)));
 990                                 } break;
 991
 992                                 case LC_SYMTAB: {
 993                                     struct symtab_command *symtab = reinterpret_cast<struct symtab_command *>(load_command);
 994                                     size = mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize);
 995                                 } break;
 996                             }
 997                         }
 998                     }
 999
1000                     _assert(size != _not(uint32_t));
1001
1002                     _foreach (segment, mach_header.GetSegments("__LINKEDIT")) {
1003                         segment->filesize -= mach_header.GetSize() - size;
1004
1005                         if (fat_arch *fat_arch = mach_header.GetFatArch()) {
1006                             fat_arch->size = fat_header.Swap(size);
1007                             clip = std::max(clip, fat_header.Swap(fat_arch->offset) + size);
1008                         } else
1009                             clip = std::max(clip, size);
1010                     }
1011
1012                     _foreach (segment, mach_header.GetSegments64("__LINKEDIT")) {
1013                         segment->filesize -= mach_header.GetSize() - size;
1014
1015                         if (fat_arch *fat_arch = mach_header.GetFatArch()) {
1016                             fat_arch->size = fat_header.Swap(size);
1017                             clip = std::max(clip, fat_header.Swap(fat_arch->offset) + size);
1018                         } else
1019                             clip = std::max(clip, size);
1020                     }
1021                 }
1022             }
1023
1024             if (clip != 0)
1025                 _syscall(truncate(path, clip));
1026         }
1027
1028         if (flag_S) {
1029             Map input(path, true);
1030             FatHeader source(input.data(), input.size());
1031
1032             size_t offset(0);
1033
1034             if (source.IsFat())
1035                 offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
1036
1037             std::vector<CodesignAllocation> allocations; {
1038                 _foreach (mach_header, source.GetMachHeaders()) {
1039                     if (flag_A) {
1040                         if (mach_header.GetCPUType() != flag_CPUType)
1041                             continue;
1042                         if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
1043                             continue;
1044                     }
1045
1046                     size_t size(_not(size_t)); {
1047                         _foreach (load_command, mach_header.GetLoadCommands()) {
1048                             uint32_t cmd(mach_header.Swap(load_command->cmd));
1049                             if (cmd == LC_CODE_SIGNATURE) {
1050                                 struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1051                                 size = mach_header.Swap(signature->dataoff);
1052                                 _assert(size < mach_header.GetSize());
1053                                 break;
1054                             }
1055                         }
1056
1057                         if (size == _not(size_t))
1058                             size = mach_header.GetSize();
1059                     }
1060
1061                     size_t alloc(0);
1062                     alloc += sizeof(struct SuperBlob);
1063                     uint32_t special(0);
1064
1065                     special = std::max(special, CSSLOT_CODEDIRECTORY);
1066                     alloc += sizeof(struct BlobIndex);
1067                     alloc += sizeof(struct CodeDirectory);
1068                     alloc += strlen(name) + 1;
1069
1070                     special = std::max(special, CSSLOT_REQUIREMENTS);
1071                     alloc += sizeof(struct BlobIndex);
1072                     alloc += 0xc;
1073
1074                     if (xmld != NULL) {
1075                         special = std::max(special, CSSLOT_ENTITLEMENTS);
1076                         alloc += sizeof(struct BlobIndex);
1077                         alloc += sizeof(struct Blob);
1078                         alloc += xmls;
1079                     }
1080
1081                     size_t normal((size + 0x1000 - 1) / 0x1000);
1082                     alloc = Align(alloc + (special + normal) * 0x14, 16);
1083
1084                     auto *fat_arch(mach_header.GetFatArch());
1085                     uint32_t align(fat_arch == NULL ? 0 : source.Swap(fat_arch->align));
1086                     offset = Align(offset, 1 << align);
1087
1088                     allocations.push_back(CodesignAllocation(mach_header, offset, size, alloc, align));
1089                     offset += size + alloc;
1090                     offset = Align(offset, 16);
1091                 }
1092             }
1093
1094             asprintf(&temp, "%s.%s.cs", dir.c_str(), base);
1095             fclose(fopen(temp, "w+"));
1096             _syscall(truncate(temp, offset));
1097
1098             Map output(temp, false);
1099             _assert(output.size() == offset);
1100             void *file(output.data());
1101             memset(file, 0, offset);
1102
1103             fat_arch *fat_arch;
1104             if (!source.IsFat())
1105                 fat_arch = NULL;
1106             else {
1107                 auto *fat_header(reinterpret_cast<struct fat_header *>(file));
1108                 fat_header->magic = Swap(FAT_MAGIC);
1109                 fat_header->nfat_arch = Swap(source.Swap(source->nfat_arch));
1110                 fat_arch = reinterpret_cast<struct fat_arch *>(fat_header + 1);
1111             }
1112
1113             _foreach (allocation, allocations) {
1114                 auto &source(allocation.mach_header_);
1115
1116                 uint32_t align(allocation.size_);
1117                 align = Align(align, 0x10);
1118
1119                 if (fat_arch != NULL) {
1120                     fat_arch->cputype = Swap(source->cputype);
1121                     fat_arch->cpusubtype = Swap(source->cpusubtype);
1122                     fat_arch->offset = Swap(allocation.offset_);
1123                     fat_arch->size = Swap(align + allocation.alloc_);
1124                     fat_arch->align = Swap(allocation.align_);
1125                     ++fat_arch;
1126                 }
1127
1128                 void *target(reinterpret_cast<uint8_t *>(file) + allocation.offset_);
1129                 memcpy(target, source, allocation.size_);
1130                 MachHeader mach_header(target, align + allocation.alloc_);
1131
1132                 struct linkedit_data_command *signature(NULL);
1133                 _foreach (load_command, mach_header.GetLoadCommands()) {
1134                     uint32_t cmd(mach_header.Swap(load_command->cmd));
1135                     if (cmd != LC_CODE_SIGNATURE)
1136                         continue;
1137                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1138                     break;
1139                 }
1140
1141                 if (signature == NULL) {
1142                     mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) + 1);
1143                     signature = reinterpret_cast<struct linkedit_data_command *>(reinterpret_cast<uint8_t *>(mach_header.GetLoadCommand()) + mach_header.Swap(mach_header->sizeofcmds));
1144                     mach_header->sizeofcmds = mach_header.Swap(mach_header.Swap(mach_header->sizeofcmds) + uint32_t(sizeof(*signature)));
1145                     signature->cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1146                     signature->cmdsize = mach_header.Swap(uint32_t(sizeof(*signature)));
1147                 }
1148
1149                 signature->dataoff = mach_header.Swap(align);
1150                 signature->datasize = mach_header.Swap(allocation.alloc_);
1151
1152                 _foreach (segment, mach_header.GetSegments("__LINKEDIT")) {
1153                     size_t size(mach_header.Swap(align + allocation.alloc_ - mach_header.Swap(segment->fileoff)));
1154                     segment->filesize = size;
1155                     segment->vmsize = Align(size, 0x1000);
1156                 }
1157
1158                 _foreach (segment, mach_header.GetSegments64("__LINKEDIT")) {
1159                     size_t size(mach_header.Swap(align + allocation.alloc_ - mach_header.Swap(segment->fileoff)));
1160                     segment->filesize = size;
1161                     segment->vmsize = Align(size, 0x1000);
1162                 }
1163             }
1164         }
1165
1166         if (flag_p)
1167             printf("path%zu='%s'\n", filei, file.c_str());
1168
1169         Map mapping(temp == NULL ? path : temp, !(flag_R || flag_T || flag_s || flag_S || flag_O || flag_D));
1170         FatHeader fat_header(mapping.data(), mapping.size());
1171
1172         _foreach (mach_header, fat_header.GetMachHeaders()) {
1173             struct linkedit_data_command *signature(NULL);
1174             struct encryption_info_command *encryption(NULL);
1175
1176             if (flag_A) {
1177                 if (mach_header.GetCPUType() != flag_CPUType)
1178                     continue;
1179                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
1180                     continue;
1181             }
1182
1183             if (flag_a)
1184                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
1185
1186             if (flag_d) {
1187                 if (struct fat_arch *fat_arch = mach_header.GetFatArch())
1188                     printf("offset=0x%x\n", Swap(fat_arch->offset));
1189                 else
1190                     printf("offset=0x0\n");
1191             }
1192
1193             if (woffset != _not(uintptr_t)) {
1194                 Pointer<uint32_t> wvalue(mach_header.GetPointer<uint32_t>(woffset));
1195                 if (wvalue == NULL)
1196                     printf("(null) %p\n", reinterpret_cast<void *>(woffset));
1197                 else
1198                     printf("0x%.08x\n", *wvalue);
1199             }
1200
1201             if (noffset != _not(uintptr_t))
1202                 printf("%s\n", &*mach_header.GetPointer<char>(noffset));
1203
1204             if (flag_d)
1205                 _foreach(segment, mach_header.GetSegments("__TEXT")) {
1206                     printf("vmaddr=0x%x\n", mach_header.Swap(segment->vmaddr));
1207                     printf("fileoff=0x%x\n", mach_header.Swap(segment->fileoff));
1208                 }
1209
1210             if (flag_O) {
1211                 _foreach(section, mach_header.GetSections("__TEXT", "__text"))
1212                     section->addr = mach_header.Swap(0);
1213             }
1214
1215             _foreach (load_command, mach_header.GetLoadCommands()) {
1216                 uint32_t cmd(mach_header.Swap(load_command->cmd));
1217
1218                 if (flag_R && cmd == LC_REEXPORT_DYLIB)
1219                     load_command->cmd = mach_header.Swap(LC_LOAD_DYLIB);
1220                 else if (cmd == LC_CODE_SIGNATURE)
1221                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1222                 else if (cmd == LC_ENCRYPTION_INFO)
1223                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
1224                 else if (cmd == LC_UUID) {
1225                     volatile struct uuid_command *uuid_command(reinterpret_cast<struct uuid_command *>(load_command));
1226
1227                     if (flag_u) {
1228                         printf("uuid%zu=%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x\n", filei,
1229                             uuid_command->uuid[ 0], uuid_command->uuid[ 1], uuid_command->uuid[ 2], uuid_command->uuid[ 3],
1230                             uuid_command->uuid[ 4], uuid_command->uuid[ 5], uuid_command->uuid[ 6], uuid_command->uuid[ 7],
1231                             uuid_command->uuid[ 8], uuid_command->uuid[ 9], uuid_command->uuid[10], uuid_command->uuid[11],
1232                             uuid_command->uuid[12], uuid_command->uuid[13], uuid_command->uuid[14], uuid_command->uuid[15]
1233                         );
1234                     }
1235                 } else if (cmd == LC_ID_DYLIB) {
1236                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
1237
1238                     if (flag_t)
1239                         printf("time%zu=0x%.8x\n", filei, mach_header.Swap(dylib_command->dylib.timestamp));
1240
1241                     if (flag_T) {
1242                         uint32_t timed;
1243
1244                         if (!timeh)
1245                             timed = timev;
1246                         else {
1247                             dylib_command->dylib.timestamp = 0;
1248                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
1249                         }
1250
1251                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
1252                     }
1253                 }
1254             }
1255
1256             if (flag_d) {
1257                 _assert(encryption != NULL);
1258
1259                 printf("cryptoff=0x%x\n", mach_header.Swap(encryption->cryptoff));
1260                 printf("cryptsize=0x%x\n", mach_header.Swap(encryption->cryptsize));
1261                 printf("cryptid=0x%x\n", mach_header.Swap(encryption->cryptid));
1262             }
1263
1264             if (flag_D) {
1265                 _assert(encryption != NULL);
1266                 encryption->cryptid = mach_header.Swap(0);
1267             }
1268
1269             if (flag_e) {
1270                 _assert(signature != NULL);
1271
1272                 uint32_t data = mach_header.Swap(signature->dataoff);
1273
1274                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
1275                 uint8_t *blob = top + data;
1276                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
1277
1278                 for (size_t index(0); index != Swap(super->count); ++index)
1279                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
1280                         uint32_t begin = Swap(super->index[index].offset);
1281                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
1282                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(struct Blob), stdout);
1283                     }
1284             }
1285
1286             if (flag_s) {
1287                 _assert(signature != NULL);
1288
1289                 uint32_t data = mach_header.Swap(signature->dataoff);
1290
1291                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
1292                 uint8_t *blob = top + data;
1293                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
1294
1295                 for (size_t index(0); index != Swap(super->count); ++index)
1296                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
1297                         uint32_t begin = Swap(super->index[index].offset);
1298                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
1299
1300                         uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + begin + Swap(directory->hashOffset));
1301                         uint32_t pages = Swap(directory->nCodeSlots);
1302
1303                         if (pages != 1)
1304                             for (size_t i = 0; i != pages - 1; ++i)
1305                                 sha1(hashes[i], top + 0x1000 * i, 0x1000);
1306                         if (pages != 0)
1307                             sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
1308                     }
1309             }
1310
1311             if (flag_S) {
1312                 _assert(signature != NULL);
1313
1314                 uint32_t data = mach_header.Swap(signature->dataoff);
1315                 uint32_t size = mach_header.Swap(signature->datasize);
1316
1317                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
1318                 uint8_t *blob = top + data;
1319                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
1320                 super->blob.magic = Swap(CSMAGIC_EMBEDDED_SIGNATURE);
1321
1322                 uint32_t count = xmld == NULL ? 2 : 3;
1323                 uint32_t offset = sizeof(struct SuperBlob) + count * sizeof(struct BlobIndex);
1324
1325                 super->index[0].type = Swap(CSSLOT_CODEDIRECTORY);
1326                 super->index[0].offset = Swap(offset);
1327
1328                 uint32_t begin = offset;
1329                 struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
1330                 offset += sizeof(struct CodeDirectory);
1331
1332                 directory->blob.magic = Swap(CSMAGIC_CODEDIRECTORY);
1333                 directory->version = Swap(uint32_t(0x00020001));
1334                 directory->flags = Swap(uint32_t(0));
1335                 directory->codeLimit = Swap(data);
1336                 directory->hashSize = 0x14;
1337                 directory->hashType = 0x01;
1338                 directory->spare1 = 0x00;
1339                 directory->pageSize = 0x0c;
1340                 directory->spare2 = Swap(uint32_t(0));
1341
1342                 directory->identOffset = Swap(offset - begin);
1343                 strcpy(reinterpret_cast<char *>(blob + offset), name);
1344                 offset += strlen(name) + 1;
1345
1346                 uint32_t special = xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS;
1347                 directory->nSpecialSlots = Swap(special);
1348
1349                 uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + offset);
1350                 memset(hashes, 0, sizeof(*hashes) * special);
1351
1352                 offset += sizeof(*hashes) * special;
1353                 hashes += special;
1354
1355                 uint32_t pages = (data + 0x1000 - 1) / 0x1000;
1356                 directory->nCodeSlots = Swap(pages);
1357
1358                 if (pages != 1)
1359                     for (size_t i = 0; i != pages - 1; ++i)
1360                         sha1(hashes[i], top + 0x1000 * i, 0x1000);
1361                 if (pages != 0)
1362                     sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
1363
1364                 directory->hashOffset = Swap(offset - begin);
1365                 offset += sizeof(*hashes) * pages;
1366                 directory->blob.length = Swap(offset - begin);
1367
1368                 super->index[1].type = Swap(CSSLOT_REQUIREMENTS);
1369                 super->index[1].offset = Swap(offset);
1370
1371                 memcpy(blob + offset, "\xfa\xde\x0c\x01\x00\x00\x00\x0c\x00\x00\x00\x00", 0xc);
1372                 offset += 0xc;
1373
1374                 if (xmld != NULL) {
1375                     super->index[2].type = Swap(CSSLOT_ENTITLEMENTS);
1376                     super->index[2].offset = Swap(offset);
1377
1378                     uint32_t begin = offset;
1379                     struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
1380                     offset += sizeof(struct Blob);
1381
1382                     memcpy(blob + offset, xmld, xmls);
1383                     offset += xmls;
1384
1385                     entitlements->magic = Swap(CSMAGIC_ENTITLEMENTS);
1386                     entitlements->length = Swap(offset - begin);
1387                 }
1388
1389                 for (size_t index(0); index != count; ++index) {
1390                     uint32_t type = Swap(super->index[index].type);
1391                     if (type != 0 && type <= special) {
1392                         uint32_t offset = Swap(super->index[index].offset);
1393                         struct Blob *local = (struct Blob *) (blob + offset);
1394                         sha1((uint8_t *) (hashes - type), (uint8_t *) local, Swap(local->length));
1395                     }
1396                 }
1397
1398                 super->count = Swap(count);
1399                 super->blob.length = Swap(offset);
1400
1401                 if (offset > size) {
1402                     fprintf(stderr, "offset (%u) > size (%u)\n", offset, size);
1403                     _assert(false);
1404                 } //else fprintf(stderr, "offset (%zu) <= size (%zu)\n", offset, size);
1405
1406                 memset(blob + offset, 0, size - offset);
1407             }
1408         }
1409
1410         if (flag_S) {
1411             uint8_t *top = reinterpret_cast<uint8_t *>(fat_header.GetBase());
1412             size_t size = fat_header.GetSize();
1413
1414             char *copy;
1415             asprintf(&copy, "%s.%s.cp", dir.c_str(), base);
1416             FILE *file = fopen(copy, "w+");
1417             size_t writ = fwrite(top, 1, size, file);
1418             _assert(writ == size);
1419             fclose(file);
1420
1421             _syscall(unlink(temp));
1422             free(temp);
1423             temp = copy;
1424         }
1425
1426         if (temp != NULL) {
1427             struct stat info;
1428             _syscall(stat(path, &info));
1429             _syscall(chown(temp, info.st_uid, info.st_gid));
1430             _syscall(chmod(temp, info.st_mode));
1431             _syscall(unlink(path));
1432             _syscall(rename(temp, path));
1433             free(temp);
1434         }
1435
1436         ++filei;
1437     } catch (const char *) {
1438         ++filee;
1439         ++filei;
1440     }
1441
1442     return filee;
1443 }