ldid.cpp

   1 /* JocStrap - Java/Objective-C Bootstrap
   2  * Copyright (C) 2007  Jay Freeman (saurik)
   3 */
   4
   5 /*
   6  *        Redistribution and use in source and binary
   7  * forms, with or without modification, are permitted
   8  * provided that the following conditions are met:
   9  *
  10  * 1. Redistributions of source code must retain the
  11  *    above copyright notice, this list of conditions
  12  *    and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the
  14  *    above copyright notice, this list of conditions
  15  *    and the following disclaimer in the documentation
  16  *    and/or other materials provided with the
  17  *    distribution.
  18  * 3. The name of the author may not be used to endorse
  19  *    or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  24  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  28  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  33  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  34  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  35  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38 #include "minimal/stdlib.h"
  39 #include "minimal/string.h"
  40 #include "minimal/mapping.h"
  41
  42 #include "sha1.h"
  43
  44 #include <cstring>
  45 #include <string>
  46 #include <vector>
  47
  48 #include <sys/wait.h>
  49 #include <sys/types.h>
  50 #include <sys/stat.h>
  51
  52 struct fat_header {
  53     uint32_t magic;
  54     uint32_t nfat_arch;
  55 } _packed;
  56
  57 #define FAT_MAGIC 0xcafebabe
  58 #define FAT_CIGAM 0xbebafeca
  59
  60 struct fat_arch {
  61     uint32_t cputype;
  62     uint32_t cpusubtype;
  63     uint32_t offset;
  64     uint32_t size;
  65     uint32_t align;
  66 } _packed;
  67
  68 struct mach_header {
  69     uint32_t magic;
  70     uint32_t cputype;
  71     uint32_t cpusubtype;
  72     uint32_t filetype;
  73     uint32_t ncmds;
  74     uint32_t sizeofcmds;
  75     uint32_t flags;
  76 } _packed;
  77
  78 #define MH_MAGIC 0xfeedface
  79 #define MH_CIGAM 0xcefaedfe
  80
  81 #define MH_MAGIC_64 0xfeedfacf
  82 #define MH_CIGAM_64 0xcffaedfe
  83
  84 #define MH_DYLDLINK   0x4
  85
  86 #define MH_EXECUTE    0x2
  87 #define MH_DYLIB      0x6
  88 #define MH_BUNDLE     0x8
  89 #define MH_DYLIB_STUB 0x9
  90
  91 struct load_command {
  92     uint32_t cmd;
  93     uint32_t cmdsize;
  94 } _packed;
  95
  96 #define LC_REQ_DYLD  uint32_t(0x80000000)
  97
  98 #define LC_SEGMENT         uint32_t(0x01)
  99 #define LC_LOAD_DYLIB      uint32_t(0x0c)
 100 #define LC_ID_DYLIB        uint32_t(0x0d)
 101 #define LC_UUID            uint32_t(0x1b)
 102 #define LC_CODE_SIGNATURE  uint32_t(0x1d)
 103 #define LC_REEXPORT_DYLIB  uint32_t(0x1f | LC_REQ_DYLD)
 104
 105 struct dylib {
 106     uint32_t name;
 107     uint32_t timestamp;
 108     uint32_t current_version;
 109     uint32_t compatibility_version;
 110 } _packed;
 111
 112 struct dylib_command {
 113     uint32_t cmd;
 114     uint32_t cmdsize;
 115     struct dylib dylib;
 116 } _packed;
 117
 118 struct uuid_command {
 119     uint32_t cmd;
 120     uint32_t cmdsize;
 121     uint8_t uuid[16];
 122 } _packed;
 123
 124 struct segment_command {
 125     uint32_t cmd;
 126     uint32_t cmdsize;
 127     char segname[16];
 128     uint32_t vmaddr;
 129     uint32_t vmsize;
 130     uint32_t fileoff;
 131     uint32_t filesize;
 132     uint32_t maxprot;
 133     uint32_t initprot;
 134     uint32_t nsects;
 135     uint32_t flags;
 136 };
 137
 138 struct section {
 139     char sectname[16];
 140     char segname[16];
 141     uint32_t addr;
 142     uint32_t size;
 143     uint32_t offset;
 144     uint32_t align;
 145     uint32_t reloff;
 146     uint32_t nreloc;
 147     uint32_t flags;
 148     uint32_t reserved1;
 149     uint32_t reserved2;
 150 };
 151
 152 struct linkedit_data_command {
 153     uint32_t cmd;
 154     uint32_t cmdsize;
 155     uint32_t dataoff;
 156     uint32_t datasize;
 157 } _packed;
 158
 159 uint16_t Swap_(uint16_t value) {
 160     return
 161         ((value >>  8) & 0x00ff) |
 162         ((value <<  8) & 0xff00);
 163 }
 164
 165 uint32_t Swap_(uint32_t value) {
 166     value = ((value >>  8) & 0x00ff00ff) |
 167             ((value <<  8) & 0xff00ff00);
 168     value = ((value >> 16) & 0x0000ffff) |
 169             ((value << 16) & 0xffff0000);
 170     return value;
 171 }
 172
 173 int16_t Swap_(int16_t value) {
 174     return Swap_(static_cast<uint16_t>(value));
 175 }
 176
 177 int32_t Swap_(int32_t value) {
 178     return Swap_(static_cast<uint32_t>(value));
 179 }
 180
 181 bool little_(true);
 182
 183 uint16_t Swap(uint16_t value) {
 184     return little_ ? Swap_(value) : value;
 185 }
 186
 187 uint32_t Swap(uint32_t value) {
 188     return little_ ? Swap_(value) : value;
 189 }
 190
 191 int16_t Swap(int16_t value) {
 192     return Swap(static_cast<uint16_t>(value));
 193 }
 194
 195 int32_t Swap(int32_t value) {
 196     return Swap(static_cast<uint32_t>(value));
 197 }
 198
 199 template <typename Target_>
 200 class Pointer;
 201
 202 class Framework {
 203   private:
 204     void *base_;
 205     size_t size_;
 206
 207     struct mach_header *mach_header_;
 208     struct load_command *load_command_;
 209
 210     bool swapped_;
 211     bool bits64_;
 212
 213   public:
 214     uint16_t Swap(uint16_t value) const {
 215         return swapped_ ? Swap_(value) : value;
 216     }
 217
 218     uint32_t Swap(uint32_t value) const {
 219         return swapped_ ? Swap_(value) : value;
 220     }
 221
 222     int16_t Swap(int16_t value) const {
 223         return Swap(static_cast<uint16_t>(value));
 224     }
 225
 226     int32_t Swap(int32_t value) const {
 227         return Swap(static_cast<uint32_t>(value));
 228     }
 229
 230     Framework(const char *framework_path) :
 231         swapped_(false)
 232     {
 233         base_ = map(framework_path, 0, _not(size_t), &size_, false);
 234         fat_header *fat_header = reinterpret_cast<struct fat_header *>(base_);
 235
 236         if (Swap(fat_header->magic) == FAT_CIGAM) {
 237             swapped_ = !swapped_;
 238             goto fat;
 239         } else if (Swap(fat_header->magic) != FAT_MAGIC)
 240             mach_header_ = (mach_header *) base_;
 241         else fat: {
 242             size_t fat_narch = Swap(fat_header->nfat_arch);
 243             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header + 1);
 244             size_t arch;
 245             for (arch = 0; arch != fat_narch; ++arch) {
 246                 uint32_t arch_offset = Swap(fat_arch->offset);
 247                 mach_header_ = (mach_header *) ((uint8_t *) base_ + arch_offset);
 248                 goto found;
 249                 ++fat_arch;
 250             }
 251
 252             _assert(false);
 253         }
 254
 255       found:
 256         switch (Swap(mach_header_->magic)) {
 257             case MH_CIGAM:
 258                 swapped_ = !swapped_;
 259             case MH_MAGIC:
 260                 bits64_ = false;
 261             break;
 262
 263             case MH_CIGAM_64:
 264                 swapped_ = !swapped_;
 265             case MH_MAGIC_64:
 266                 bits64_ = true;
 267             break;
 268
 269             default:
 270                 _assert(false);
 271         }
 272
 273         void *post = mach_header_ + 1;
 274         if (bits64_)
 275             post = (uint32_t *) post + 1;
 276         load_command_ = (struct load_command *) post;
 277
 278         _assert(
 279             Swap(mach_header_->filetype) == MH_EXECUTE ||
 280             Swap(mach_header_->filetype) == MH_DYLIB ||
 281             Swap(mach_header_->filetype) == MH_BUNDLE
 282         );
 283     }
 284
 285     struct mach_header *operator ->() const {
 286         return mach_header_;
 287     }
 288
 289     void *GetBase() {
 290         return base_;
 291     }
 292
 293     size_t GetSize() const {
 294         return size_;
 295     }
 296
 297     uint32_t GetCPUType() const {
 298         return Swap(mach_header_->cputype);
 299     }
 300
 301     uint16_t GetCPUSubtype() const {
 302         return Swap(mach_header_->cpusubtype) & 0xff;
 303     }
 304
 305     std::vector<struct load_command *> GetLoadCommands() {
 306         std::vector<struct load_command *> load_commands;
 307
 308         struct load_command *load_command = load_command_;
 309         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 310             load_commands.push_back(load_command);
 311             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 312         }
 313
 314         return load_commands;
 315     }
 316
 317     std::vector<segment_command *> GetSegments(const char *segment_name) {
 318         std::vector<struct segment_command *> segment_commands;
 319
 320         _foreach (load_command, GetLoadCommands())
 321             if (Swap((*load_command)->cmd) == LC_SEGMENT) {
 322                 segment_command *segment_command = reinterpret_cast<struct segment_command *>(*load_command);
 323                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 324                     segment_commands.push_back(segment_command);
 325             }
 326
 327         return segment_commands;
 328     }
 329
 330     std::vector<section *> GetSections(const char *segment_name, const char *section_name) {
 331         std::vector<section *> sections;
 332
 333         _foreach (segment, GetSegments(segment_name)) {
 334             section *section = (struct section *) (*segment + 1);
 335
 336             uint32_t sect;
 337             for (sect = 0; sect != Swap((*segment)->nsects); ++sect) {
 338                 if (strncmp(section->sectname, section_name, 16) == 0)
 339                     sections.push_back(section);
 340                 ++section;
 341             }
 342         }
 343
 344         return sections;
 345     }
 346
 347     template <typename Target_>
 348     Pointer<Target_> GetPointer(uint32_t address, const char *segment_name = NULL) {
 349         load_command *load_command = (struct load_command *) (mach_header_ + 1);
 350         uint32_t cmd;
 351
 352         for (cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 353             if (Swap(load_command->cmd) == LC_SEGMENT) {
 354                 segment_command *segment_command = (struct segment_command *) load_command;
 355                 if (segment_name != NULL && strncmp(segment_command->segname, segment_name, 16) != 0)
 356                     goto next_command;
 357
 358                 section *sections = (struct section *) (segment_command + 1);
 359
 360                 uint32_t sect;
 361                 for (sect = 0; sect != Swap(segment_command->nsects); ++sect) {
 362                     section *section = &sections[sect];
 363                     //printf("%s %u %p %p %u\n", segment_command->segname, sect, address, section->addr, section->size);
 364                     if (address >= Swap(section->addr) && address < Swap(section->addr) + Swap(section->size)) {
 365                         //printf("0x%.8x %s\n", address, segment_command->segname);
 366                         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(address - Swap(section->addr) + Swap(section->offset) + (char *) mach_header_));
 367                     }
 368                 }
 369             }
 370
 371           next_command:
 372             load_command = (struct load_command *) ((char *) load_command + Swap(load_command->cmdsize));
 373         }
 374
 375         return Pointer<Target_>(this);
 376     }
 377
 378     template <typename Target_>
 379     Pointer<Target_> GetOffset(uint32_t offset) {
 380         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_));
 381     }
 382 };
 383
 384 template <typename Target_>
 385 class Pointer {
 386   private:
 387     const Framework *framework_;
 388     const Target_ *pointer_;
 389
 390   public:
 391     Pointer(const Framework *framework = NULL, const Target_ *pointer = NULL) :
 392         framework_(framework),
 393         pointer_(pointer)
 394     {
 395     }
 396
 397     operator const Target_ *() const {
 398         return pointer_;
 399     }
 400
 401     const Target_ *operator ->() const {
 402         return pointer_;
 403     }
 404
 405     Pointer<Target_> &operator ++() {
 406         ++pointer_;
 407         return *this;
 408     }
 409
 410     template <typename Value_>
 411     Value_ Swap(Value_ value) {
 412         return framework_->Swap(value);
 413     }
 414 };
 415
 416 #define CSMAGIC_CODEDIRECTORY      uint32_t(0xfade0c02)
 417 #define CSMAGIC_EMBEDDED_SIGNATURE uint32_t(0xfade0cc0)
 418 #define CSMAGIC_ENTITLEMENTS       uint32_t(0xfade7171)
 419
 420 #define CSSLOT_CODEDIRECTORY uint32_t(0)
 421 #define CSSLOT_REQUIREMENTS  uint32_t(2)
 422 #define CSSLOT_ENTITLEMENTS  uint32_t(5)
 423
 424 struct BlobIndex {
 425     uint32_t type;
 426     uint32_t offset;
 427 } _packed;
 428
 429 struct Blob {
 430     uint32_t magic;
 431     uint32_t length;
 432 } _packed;
 433
 434 struct SuperBlob {
 435     struct Blob blob;
 436     uint32_t count;
 437     struct BlobIndex index[];
 438 } _packed;
 439
 440 struct CodeDirectory {
 441     struct Blob blob;
 442     uint32_t version;
 443     uint32_t flags;
 444     uint32_t hashOffset;
 445     uint32_t identOffset;
 446     uint32_t nSpecialSlots;
 447     uint32_t nCodeSlots;
 448     uint32_t codeLimit;
 449     uint8_t hashSize;
 450     uint8_t hashType;
 451     uint8_t spare1;
 452     uint8_t pageSize;
 453     uint32_t spare2;
 454 } _packed;
 455
 456 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 457
 458 #define CODESIGN_ALLOCATE "arm-apple-darwin9-codesign_allocate"
 459
 460 void sha1(uint8_t *hash, uint8_t *data, size_t size) {
 461     SHA1Context context;
 462     SHA1Reset(&context);
 463     SHA1Input(&context, data, size);
 464     SHA1Result(&context, hash);
 465 }
 466
 467 int main(int argc, const char *argv[]) {
 468     union {
 469         uint16_t word;
 470         uint8_t byte[2];
 471     } endian = {1};
 472
 473     little_ = endian.byte[0];
 474
 475     bool flag_R(false);
 476     bool flag_t(false);
 477     bool flag_p(false);
 478     bool flag_u(false);
 479     bool flag_e(false);
 480
 481     bool flag_T(false);
 482
 483     bool flag_S(false);
 484     bool flag_s(false);
 485
 486     bool timeh(false);
 487     uint32_t timev(0);
 488
 489     const void *xmld(NULL);
 490     size_t xmls(0);
 491
 492     uintptr_t noffset(_not(uintptr_t));
 493     uintptr_t woffset(_not(uintptr_t));
 494
 495     std::vector<std::string> files;
 496
 497     if (argc == 1) {
 498         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
 499         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
 500         fprintf(stderr, "   %s -S cat\n", argv[0]);
 501         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
 502         exit(0);
 503     }
 504
 505     for (int argi(1); argi != argc; ++argi)
 506         if (argv[argi][0] != '-')
 507             files.push_back(argv[argi]);
 508         else switch (argv[argi][1]) {
 509             case 'R': flag_R = true; break;
 510             case 't': flag_t = true; break;
 511             case 'u': flag_u = true; break;
 512             case 'p': flag_p = true; break;
 513             case 'e': flag_e = true; break;
 514
 515             case 's':
 516                 _assert(!flag_S);
 517                 flag_s = true;
 518             break;
 519
 520             case 'S':
 521                 _assert(!flag_s);
 522                 flag_S = true;
 523                 if (argv[argi][2] != '\0') {
 524                     const char *xml = argv[argi] + 2;
 525                     xmld = map(xml, 0, _not(size_t), &xmls, true);
 526                 }
 527             break;
 528
 529             case 'T': {
 530                 flag_T = true;
 531                 if (argv[argi][2] == '-')
 532                     timeh = true;
 533                 else {
 534                     char *arge;
 535                     timev = strtoul(argv[argi] + 2, &arge, 0);
 536                     _assert(arge == argv[argi] + strlen(argv[argi]));
 537                 }
 538             } break;
 539
 540             case 'n': {
 541                 char *arge;
 542                 noffset = strtoul(argv[argi] + 2, &arge, 0);
 543                 _assert(arge == argv[argi] + strlen(argv[argi]));
 544             } break;
 545
 546             case 'w': {
 547                 char *arge;
 548                 woffset = strtoul(argv[argi] + 2, &arge, 0);
 549                 _assert(arge == argv[argi] + strlen(argv[argi]));
 550             } break;
 551
 552             default:
 553                 goto usage;
 554             break;
 555         }
 556
 557     if (files.empty()) usage: {
 558         exit(0);
 559     }
 560
 561     size_t filei(0), filee(0);
 562     _foreach (file, files) try {
 563         const char *path(file->c_str());
 564         const char *base = strrchr(path, '/');
 565         char *temp(NULL), *dir;
 566
 567         if (base != NULL)
 568             dir = strndup_(path, base++ - path + 1);
 569         else {
 570             dir = strdup("");
 571             base = path;
 572         }
 573
 574         if (flag_S) {
 575             asprintf(&temp, "%s.%s.cs", dir, base);
 576             const char *allocate = getenv("CODESIGN_ALLOCATE");
 577             if (allocate == NULL)
 578                 allocate = "codesign_allocate";
 579
 580             size_t size = _not(size_t);
 581             const char *arch; {
 582                 Framework framework(path);
 583                 framework->flags = framework.Swap(framework.Swap(framework->flags) | MH_DYLDLINK);
 584
 585                 _foreach (load_command, framework.GetLoadCommands()) {
 586                     uint32_t cmd(framework.Swap((*load_command)->cmd));
 587                     if (cmd == LC_CODE_SIGNATURE) {
 588                         struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(*load_command);
 589                         size = framework.Swap(signature->dataoff);
 590                         _assert(size < framework.GetSize());
 591                         break;
 592                     }
 593                 }
 594
 595                 if (size == _not(size_t))
 596                     size = framework.GetSize();
 597
 598                 switch (framework.GetCPUType()) {
 599                     case 7: switch (framework.GetCPUSubtype()) {
 600                         case 3: arch = "i386"; break;
 601                         default: arch = NULL; break;
 602                     } break;
 603
 604                     case 12: switch (framework.GetCPUSubtype()) {
 605                         case 0: arch = "arm"; break;
 606                         case 6: arch = "armv6"; break;
 607                         case 9: arch = "armv7"; break;
 608                         default: arch = NULL; break;
 609                     } break;
 610
 611                     case 18: switch (framework.GetCPUSubtype()) {
 612                         case 10: arch = "ppc7400"; break;
 613                         default: arch = NULL; break;
 614                     } break;
 615
 616                     case 16777223: switch (framework.GetCPUSubtype()) {
 617                         case 3: arch = "x86_64"; break;
 618                         default: arch = NULL; break;
 619                     } break;
 620
 621                     case 16777234: switch (framework.GetCPUSubtype()) {
 622                         case 0: arch = "ppc64"; break;
 623                         default: arch = NULL; break;
 624                     } break;
 625
 626                     default: arch = NULL; break;
 627                 }
 628             }
 629
 630             _assert(arch != NULL);
 631
 632             pid_t pid = fork();
 633             _syscall(pid);
 634             if (pid == 0) {
 635                 char *ssize;
 636                 asprintf(&ssize, "%u", (sizeof(struct SuperBlob) + 2 * sizeof(struct BlobIndex) + sizeof(struct CodeDirectory) + strlen(base) + 1 + ((xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS) + (size + 0x1000 - 1) / 0x1000) * 0x14 + 0xc + (xmld == NULL ? 0 : 0x10 + xmls) + 15) / 16 * 16);
 637                 //printf("%s -i %s -a %s %s -o %s\n", allocate, path, arch, ssize, temp);
 638                 execlp(allocate, allocate, "-i", path, "-a", arch, ssize, "-o", temp, NULL);
 639                 _assert(false);
 640             }
 641
 642             int status;
 643             _syscall(waitpid(pid, &status, 0));
 644             _assert(WIFEXITED(status));
 645             _assert(WEXITSTATUS(status) == 0);
 646         }
 647
 648         Framework framework(temp == NULL ? path : temp);
 649         struct linkedit_data_command *signature(NULL);
 650
 651         if (flag_p)
 652             printf("path%zu='%s'\n", filei, file->c_str());
 653
 654         if (woffset != _not(uintptr_t)) {
 655             Pointer<uint32_t> wvalue(framework.GetPointer<uint32_t>(woffset));
 656             if (wvalue == NULL)
 657                 printf("(null) %p\n", reinterpret_cast<void *>(woffset));
 658             else
 659                 printf("0x%.08x\n", *wvalue);
 660         }
 661
 662         if (noffset != _not(uintptr_t))
 663             printf("%s\n", &*framework.GetPointer<char>(noffset));
 664
 665         _foreach (load_command, framework.GetLoadCommands()) {
 666             uint32_t cmd(framework.Swap((*load_command)->cmd));
 667
 668             if (flag_R && cmd == LC_REEXPORT_DYLIB)
 669                 (*load_command)->cmd = framework.Swap(LC_LOAD_DYLIB);
 670             else if (cmd == LC_CODE_SIGNATURE)
 671                 signature = reinterpret_cast<struct linkedit_data_command *>(*load_command);
 672             else if (cmd == LC_UUID) {
 673                 volatile struct uuid_command *uuid_command(reinterpret_cast<struct uuid_command *>(*load_command));
 674
 675                 if (flag_u) {
 676                     printf("uuid%zu=%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x\n", filei,
 677                         uuid_command->uuid[ 0], uuid_command->uuid[ 1], uuid_command->uuid[ 2], uuid_command->uuid[ 3],
 678                         uuid_command->uuid[ 4], uuid_command->uuid[ 5], uuid_command->uuid[ 6], uuid_command->uuid[ 7],
 679                         uuid_command->uuid[ 8], uuid_command->uuid[ 9], uuid_command->uuid[10], uuid_command->uuid[11],
 680                         uuid_command->uuid[12], uuid_command->uuid[13], uuid_command->uuid[14], uuid_command->uuid[15]
 681                     );
 682                 }
 683             } else if (cmd == LC_ID_DYLIB) {
 684                 volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(*load_command));
 685
 686                 if (flag_t)
 687                     printf("time%zu=0x%.8x\n", filei, framework.Swap(dylib_command->dylib.timestamp));
 688
 689                 if (flag_T) {
 690                     uint32_t timed;
 691
 692                     if (!timeh)
 693                         timed = timev;
 694                     else {
 695                         dylib_command->dylib.timestamp = 0;
 696                         timed = hash(reinterpret_cast<uint8_t *>(framework.GetBase()), framework.GetSize(), timev);
 697                     }
 698
 699                     dylib_command->dylib.timestamp = framework.Swap(timed);
 700                 }
 701             }
 702         }
 703
 704         if (flag_e) {
 705             _assert(signature != NULL);
 706
 707             uint32_t data = framework.Swap(signature->dataoff);
 708             uint32_t size = framework.Swap(signature->datasize);
 709
 710             uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
 711             uint8_t *blob = top + data;
 712             struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
 713
 714             for (size_t index(0); index != Swap(super->count); ++index)
 715                 if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
 716                     uint32_t begin = Swap(super->index[index].offset);
 717                     struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
 718                     fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(struct Blob), stdout);
 719                 }
 720         }
 721
 722         if (flag_s) {
 723             _assert(signature != NULL);
 724
 725             uint32_t data = framework.Swap(signature->dataoff);
 726             uint32_t size = framework.Swap(signature->datasize);
 727
 728             uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
 729             uint8_t *blob = top + data;
 730             struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
 731
 732             for (size_t index(0); index != Swap(super->count); ++index)
 733                 if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
 734                     uint32_t begin = Swap(super->index[index].offset);
 735                     struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
 736
 737                     uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + begin + Swap(directory->hashOffset));
 738                     uint32_t pages = Swap(directory->nCodeSlots);
 739
 740                     if (pages != 1)
 741                         for (size_t i = 0; i != pages - 1; ++i)
 742                             sha1(hashes[i], top + 0x1000 * i, 0x1000);
 743                     if (pages != 0)
 744                         sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
 745                 }
 746         }
 747
 748         if (flag_S) {
 749             _assert(signature != NULL);
 750
 751             uint32_t data = framework.Swap(signature->dataoff);
 752             uint32_t size = framework.Swap(signature->datasize);
 753
 754             uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
 755             uint8_t *blob = top + data;
 756             struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
 757             super->blob.magic = Swap(CSMAGIC_EMBEDDED_SIGNATURE);
 758
 759             uint32_t count = xmld == NULL ? 2 : 3;
 760             uint32_t offset = sizeof(struct SuperBlob) + count * sizeof(struct BlobIndex);
 761
 762             super->index[0].type = Swap(CSSLOT_CODEDIRECTORY);
 763             super->index[0].offset = Swap(offset);
 764
 765             uint32_t begin = offset;
 766             struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
 767             offset += sizeof(struct CodeDirectory);
 768
 769             directory->blob.magic = Swap(CSMAGIC_CODEDIRECTORY);
 770             directory->version = Swap(uint32_t(0x00020001));
 771             directory->flags = Swap(uint32_t(0));
 772             directory->codeLimit = Swap(data);
 773             directory->hashSize = 0x14;
 774             directory->hashType = 0x01;
 775             directory->spare1 = 0x00;
 776             directory->pageSize = 0x0c;
 777             directory->spare2 = Swap(uint32_t(0));
 778
 779             directory->identOffset = Swap(offset - begin);
 780             strcpy(reinterpret_cast<char *>(blob + offset), base);
 781             offset += strlen(base) + 1;
 782
 783             uint32_t special = xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS;
 784             directory->nSpecialSlots = Swap(special);
 785
 786             uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + offset);
 787             memset(hashes, 0, sizeof(*hashes) * special);
 788
 789             offset += sizeof(*hashes) * special;
 790             hashes += special;
 791
 792             uint32_t pages = (data + 0x1000 - 1) / 0x1000;
 793             directory->nCodeSlots = Swap(pages);
 794
 795             if (pages != 1)
 796                 for (size_t i = 0; i != pages - 1; ++i)
 797                     sha1(hashes[i], top + 0x1000 * i, 0x1000);
 798             if (pages != 0)
 799                 sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
 800
 801             directory->hashOffset = Swap(offset - begin);
 802             offset += sizeof(*hashes) * pages;
 803             directory->blob.length = Swap(offset - begin);
 804
 805             super->index[1].type = Swap(CSSLOT_REQUIREMENTS);
 806             super->index[1].offset = Swap(offset);
 807
 808             memcpy(blob + offset, "\xfa\xde\x0c\x01\x00\x00\x00\x0c\x00\x00\x00\x00", 0xc);
 809             offset += 0xc;
 810
 811             if (xmld != NULL) {
 812                 super->index[2].type = Swap(CSSLOT_ENTITLEMENTS);
 813                 super->index[2].offset = Swap(offset);
 814
 815                 uint32_t begin = offset;
 816                 struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
 817                 offset += sizeof(struct Blob);
 818
 819                 memcpy(blob + offset, xmld, xmls);
 820                 offset += xmls;
 821
 822                 entitlements->magic = Swap(CSMAGIC_ENTITLEMENTS);
 823                 entitlements->length = Swap(offset - begin);
 824             }
 825
 826             for (size_t index(0); index != count; ++index) {
 827                 uint32_t type = Swap(super->index[index].type);
 828                 if (type != 0 && type <= special) {
 829                     uint32_t offset = Swap(super->index[index].offset);
 830                     struct Blob *local = (struct Blob *) (blob + offset);
 831                     sha1((uint8_t *) (hashes - type), (uint8_t *) local, Swap(local->length));
 832                 }
 833             }
 834
 835             super->count = Swap(count);
 836             super->blob.length = Swap(offset);
 837
 838             if (offset > size) {
 839                 fprintf(stderr, "offset (%u) > size (%u)\n", offset, size);
 840                 _assert(false);
 841             } //else fprintf(stderr, "offset (%zu) <= size (%zu)\n", offset, size);
 842
 843             memset(blob + offset, 0, size - offset);
 844         }
 845
 846         if (flag_S) {
 847             uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
 848             size_t size = framework.GetSize();
 849
 850             char *copy;
 851             asprintf(&copy, "%s.%s.cp", dir, base);
 852             FILE *file = fopen(copy, "w+");
 853             size_t writ = fwrite(top, 1, size, file);
 854             _assert(writ == size);
 855             fclose(file);
 856
 857             _syscall(unlink(temp));
 858             free(temp);
 859             temp = copy;
 860         }
 861
 862         if (temp) {
 863             struct stat info;
 864             _syscall(stat(path, &info));
 865             _syscall(chown(temp, info.st_uid, info.st_gid));
 866             _syscall(chmod(temp, info.st_mode));
 867             _syscall(unlink(path));
 868             _syscall(rename(temp, path));
 869             free(temp);
 870         }
 871
 872         free(dir);
 873         ++filei;
 874     } catch (const char *) {
 875         ++filee;
 876         ++filei;
 877     }
 878
 879     return filee;
 880 }