ldid.cpp

   1 /* ldid - (Mach-O) Link-Loader Identity Editor
   2  * Copyright (C) 2007-2015  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 <cstdio>
  23 #include <cstdlib>
  24 #include <cstring>
  25 #include <fstream>
  26 #include <iostream>
  27 #include <memory>
  28 #include <set>
  29 #include <sstream>
  30 #include <string>
  31 #include <vector>
  32
  33 #include <dirent.h>
  34 #include <errno.h>
  35 #include <fcntl.h>
  36 #include <regex.h>
  37 #include <stdbool.h>
  38 #include <stdint.h>
  39 #include <unistd.h>
  40
  41 #include <sys/mman.h>
  42 #include <sys/stat.h>
  43 #include <sys/types.h>
  44
  45 #ifndef LDID_NOSMIME
  46 #include <openssl/err.h>
  47 #include <openssl/pem.h>
  48 #include <openssl/pkcs7.h>
  49 #include <openssl/pkcs12.h>
  50 #endif
  51
  52 #ifdef __APPLE__
  53 #include <CommonCrypto/CommonDigest.h>
  54 #define LDID_SHA1_DIGEST_LENGTH CC_SHA1_DIGEST_LENGTH
  55 #define LDID_SHA1 CC_SHA1
  56 #define LDID_SHA1_CTX CC_SHA1_CTX
  57 #define LDID_SHA1_Init CC_SHA1_Init
  58 #define LDID_SHA1_Update CC_SHA1_Update
  59 #define LDID_SHA1_Final CC_SHA1_Final
  60 #else
  61 #include <openssl/sha.h>
  62 #define LDID_SHA1_DIGEST_LENGTH SHA_DIGEST_LENGTH
  63 #define LDID_SHA1 SHA1
  64 #define LDID_SHA1_CTX SHA_CTX
  65 #define LDID_SHA1_Init SHA1_Init
  66 #define LDID_SHA1_Update SHA1_Update
  67 #define LDID_SHA1_Final SHA1_Final
  68 #endif
  69
  70 #ifndef LDID_NOPLIST
  71 #include <plist/plist.h>
  72 #endif
  73
  74 #include "ldid.hpp"
  75
  76 #define _assert___(line) \
  77     #line
  78 #define _assert__(line) \
  79     _assert___(line)
  80
  81 #ifdef __EXCEPTIONS
  82 #define _assert_(expr, format, ...) \
  83     do if (!(expr)) { \
  84         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
  85         throw __FILE__ "(" _assert__(__LINE__) "): _assert(" #expr ")"; \
  86     } while (false)
  87 #else
  88 // XXX: this is not acceptable
  89 #define _assert_(expr, format, ...) \
  90     do if (!(expr)) { \
  91         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
  92         exit(-1); \
  93     } while (false)
  94 #endif
  95
  96 #define _assert(expr) \
  97     _assert_(expr, "%s", #expr)
  98
  99 #define _syscall(expr, ...) [&] { for (;;) { \
 100     auto _value(expr); \
 101     if ((long) _value != -1) \
 102         return _value; \
 103     int error(errno); \
 104     if (error == EINTR) \
 105         continue; \
 106     /* XXX: EINTR is included in this list to fix g++ */ \
 107     for (auto success : (long[]) {EINTR, __VA_ARGS__}) \
 108         if (error == success) \
 109             return (decltype(expr)) -success; \
 110     _assert_(false, "errno=%u", error); \
 111 } }()
 112
 113 #define _trace() \
 114     fprintf(stderr, "_trace(%s:%u): %s\n", __FILE__, __LINE__, __FUNCTION__)
 115
 116 #define _not(type) \
 117     ((type) ~ (type) 0)
 118
 119 #define _packed \
 120     __attribute__((packed))
 121
 122 template <typename Type_>
 123 struct Iterator_ {
 124     typedef typename Type_::const_iterator Result;
 125 };
 126
 127 #define _foreach(item, list) \
 128     for (bool _stop(true); _stop; ) \
 129         for (const __typeof__(list) &_list = (list); _stop; _stop = false) \
 130             for (Iterator_<__typeof__(list)>::Result _item = _list.begin(); _item != _list.end(); ++_item) \
 131                 for (bool _suck(true); _suck; _suck = false) \
 132                     for (const __typeof__(*_item) &item = *_item; _suck; _suck = false)
 133
 134 class _Scope {
 135 };
 136
 137 template <typename Function_>
 138 class Scope :
 139     public _Scope
 140 {
 141   private:
 142     Function_ function_;
 143
 144   public:
 145     Scope(const Function_ &function) :
 146         function_(function)
 147     {
 148     }
 149
 150     ~Scope() {
 151         function_();
 152     }
 153 };
 154
 155 template <typename Function_>
 156 Scope<Function_> _scope(const Function_ &function) {
 157     return Scope<Function_>(function);
 158 }
 159
 160 #define _scope__(counter, function) \
 161     __attribute__((__unused__)) \
 162     const _Scope &_scope ## counter(_scope([&]function))
 163 #define _scope_(counter, function) \
 164     _scope__(counter, function)
 165 #define _scope(function) \
 166     _scope_(__COUNTER__, function)
 167
 168 struct fat_header {
 169     uint32_t magic;
 170     uint32_t nfat_arch;
 171 } _packed;
 172
 173 #define FAT_MAGIC 0xcafebabe
 174 #define FAT_CIGAM 0xbebafeca
 175
 176 struct fat_arch {
 177     uint32_t cputype;
 178     uint32_t cpusubtype;
 179     uint32_t offset;
 180     uint32_t size;
 181     uint32_t align;
 182 } _packed;
 183
 184 struct mach_header {
 185     uint32_t magic;
 186     uint32_t cputype;
 187     uint32_t cpusubtype;
 188     uint32_t filetype;
 189     uint32_t ncmds;
 190     uint32_t sizeofcmds;
 191     uint32_t flags;
 192 } _packed;
 193
 194 #define MH_MAGIC 0xfeedface
 195 #define MH_CIGAM 0xcefaedfe
 196
 197 #define MH_MAGIC_64 0xfeedfacf
 198 #define MH_CIGAM_64 0xcffaedfe
 199
 200 #define MH_DYLDLINK   0x4
 201
 202 #define MH_OBJECT     0x1
 203 #define MH_EXECUTE    0x2
 204 #define MH_DYLIB      0x6
 205 #define MH_BUNDLE     0x8
 206 #define MH_DYLIB_STUB 0x9
 207
 208 struct load_command {
 209     uint32_t cmd;
 210     uint32_t cmdsize;
 211 } _packed;
 212
 213 #define LC_REQ_DYLD           uint32_t(0x80000000)
 214
 215 #define LC_SEGMENT            uint32_t(0x01)
 216 #define LC_SYMTAB             uint32_t(0x02)
 217 #define LC_DYSYMTAB           uint32_t(0x0b)
 218 #define LC_LOAD_DYLIB         uint32_t(0x0c)
 219 #define LC_ID_DYLIB           uint32_t(0x0d)
 220 #define LC_SEGMENT_64         uint32_t(0x19)
 221 #define LC_UUID               uint32_t(0x1b)
 222 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
 223 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
 224 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
 225 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
 226 #define LC_DYLD_INFO          uint32_t(0x22)
 227 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
 228 #define LC_ENCRYPTION_INFO_64 uint32_t(0x2c)
 229
 230 union Version {
 231     struct {
 232         uint8_t patch;
 233         uint8_t minor;
 234         uint16_t major;
 235     } _packed;
 236
 237     uint32_t value;
 238 };
 239
 240 struct dylib {
 241     uint32_t name;
 242     uint32_t timestamp;
 243     uint32_t current_version;
 244     uint32_t compatibility_version;
 245 } _packed;
 246
 247 struct dylib_command {
 248     uint32_t cmd;
 249     uint32_t cmdsize;
 250     struct dylib dylib;
 251 } _packed;
 252
 253 struct uuid_command {
 254     uint32_t cmd;
 255     uint32_t cmdsize;
 256     uint8_t uuid[16];
 257 } _packed;
 258
 259 struct symtab_command {
 260     uint32_t cmd;
 261     uint32_t cmdsize;
 262     uint32_t symoff;
 263     uint32_t nsyms;
 264     uint32_t stroff;
 265     uint32_t strsize;
 266 } _packed;
 267
 268 struct dyld_info_command {
 269     uint32_t cmd;
 270     uint32_t cmdsize;
 271     uint32_t rebase_off;
 272     uint32_t rebase_size;
 273     uint32_t bind_off;
 274     uint32_t bind_size;
 275     uint32_t weak_bind_off;
 276     uint32_t weak_bind_size;
 277     uint32_t lazy_bind_off;
 278     uint32_t lazy_bind_size;
 279     uint32_t export_off;
 280     uint32_t export_size;
 281 } _packed;
 282
 283 struct dysymtab_command {
 284     uint32_t cmd;
 285     uint32_t cmdsize;
 286     uint32_t ilocalsym;
 287     uint32_t nlocalsym;
 288     uint32_t iextdefsym;
 289     uint32_t nextdefsym;
 290     uint32_t iundefsym;
 291     uint32_t nundefsym;
 292     uint32_t tocoff;
 293     uint32_t ntoc;
 294     uint32_t modtaboff;
 295     uint32_t nmodtab;
 296     uint32_t extrefsymoff;
 297     uint32_t nextrefsyms;
 298     uint32_t indirectsymoff;
 299     uint32_t nindirectsyms;
 300     uint32_t extreloff;
 301     uint32_t nextrel;
 302     uint32_t locreloff;
 303     uint32_t nlocrel;
 304 } _packed;
 305
 306 struct dylib_table_of_contents {
 307     uint32_t symbol_index;
 308     uint32_t module_index;
 309 } _packed;
 310
 311 struct dylib_module {
 312     uint32_t module_name;
 313     uint32_t iextdefsym;
 314     uint32_t nextdefsym;
 315     uint32_t irefsym;
 316     uint32_t nrefsym;
 317     uint32_t ilocalsym;
 318     uint32_t nlocalsym;
 319     uint32_t iextrel;
 320     uint32_t nextrel;
 321     uint32_t iinit_iterm;
 322     uint32_t ninit_nterm;
 323     uint32_t objc_module_info_addr;
 324     uint32_t objc_module_info_size;
 325 } _packed;
 326
 327 struct dylib_reference {
 328     uint32_t isym:24;
 329     uint32_t flags:8;
 330 } _packed;
 331
 332 struct relocation_info {
 333     int32_t r_address;
 334     uint32_t r_symbolnum:24;
 335     uint32_t r_pcrel:1;
 336     uint32_t r_length:2;
 337     uint32_t r_extern:1;
 338     uint32_t r_type:4;
 339 } _packed;
 340
 341 struct nlist {
 342     union {
 343         char *n_name;
 344         int32_t n_strx;
 345     } n_un;
 346
 347     uint8_t n_type;
 348     uint8_t n_sect;
 349     uint8_t n_desc;
 350     uint32_t n_value;
 351 } _packed;
 352
 353 struct segment_command {
 354     uint32_t cmd;
 355     uint32_t cmdsize;
 356     char segname[16];
 357     uint32_t vmaddr;
 358     uint32_t vmsize;
 359     uint32_t fileoff;
 360     uint32_t filesize;
 361     uint32_t maxprot;
 362     uint32_t initprot;
 363     uint32_t nsects;
 364     uint32_t flags;
 365 } _packed;
 366
 367 struct segment_command_64 {
 368     uint32_t cmd;
 369     uint32_t cmdsize;
 370     char segname[16];
 371     uint64_t vmaddr;
 372     uint64_t vmsize;
 373     uint64_t fileoff;
 374     uint64_t filesize;
 375     uint32_t maxprot;
 376     uint32_t initprot;
 377     uint32_t nsects;
 378     uint32_t flags;
 379 } _packed;
 380
 381 struct section {
 382     char sectname[16];
 383     char segname[16];
 384     uint32_t addr;
 385     uint32_t size;
 386     uint32_t offset;
 387     uint32_t align;
 388     uint32_t reloff;
 389     uint32_t nreloc;
 390     uint32_t flags;
 391     uint32_t reserved1;
 392     uint32_t reserved2;
 393 } _packed;
 394
 395 struct section_64 {
 396     char sectname[16];
 397     char segname[16];
 398     uint64_t addr;
 399     uint64_t size;
 400     uint32_t offset;
 401     uint32_t align;
 402     uint32_t reloff;
 403     uint32_t nreloc;
 404     uint32_t flags;
 405     uint32_t reserved1;
 406     uint32_t reserved2;
 407 } _packed;
 408
 409 struct linkedit_data_command {
 410     uint32_t cmd;
 411     uint32_t cmdsize;
 412     uint32_t dataoff;
 413     uint32_t datasize;
 414 } _packed;
 415
 416 struct encryption_info_command {
 417     uint32_t cmd;
 418     uint32_t cmdsize;
 419     uint32_t cryptoff;
 420     uint32_t cryptsize;
 421     uint32_t cryptid;
 422 } _packed;
 423
 424 #define BIND_OPCODE_MASK                             0xf0
 425 #define BIND_IMMEDIATE_MASK                          0x0f
 426 #define BIND_OPCODE_DONE                             0x00
 427 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 428 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 429 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 430 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 431 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 432 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 433 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 434 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 435 #define BIND_OPCODE_DO_BIND                          0x90
 436 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 437 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 438 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 439
 440 inline void get(std::streambuf &stream, void *data, size_t size) {
 441     _assert(stream.sgetn(static_cast<char *>(data), size) == size);
 442 }
 443
 444 inline void put(std::streambuf &stream, const void *data, size_t size) {
 445     _assert(stream.sputn(static_cast<const char *>(data), size) == size);
 446 }
 447
 448 inline void pad(std::streambuf &stream, size_t size) {
 449     char padding[size];
 450     memset(padding, 0, size);
 451     put(stream, padding, size);
 452 }
 453
 454 template <typename Type_>
 455 Type_ Align(Type_ value, size_t align) {
 456     value += align - 1;
 457     value /= align;
 458     value *= align;
 459     return value;
 460 }
 461
 462 static const uint8_t PageShift_(0x0c);
 463 static const uint32_t PageSize_(1 << PageShift_);
 464
 465 static inline uint16_t Swap_(uint16_t value) {
 466     return
 467         ((value >>  8) & 0x00ff) |
 468         ((value <<  8) & 0xff00);
 469 }
 470
 471 static inline uint32_t Swap_(uint32_t value) {
 472     value = ((value >>  8) & 0x00ff00ff) |
 473             ((value <<  8) & 0xff00ff00);
 474     value = ((value >> 16) & 0x0000ffff) |
 475             ((value << 16) & 0xffff0000);
 476     return value;
 477 }
 478
 479 static inline uint64_t Swap_(uint64_t value) {
 480     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 481     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 482     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 483     return value;
 484 }
 485
 486 static inline int16_t Swap_(int16_t value) {
 487     return Swap_(static_cast<uint16_t>(value));
 488 }
 489
 490 static inline int32_t Swap_(int32_t value) {
 491     return Swap_(static_cast<uint32_t>(value));
 492 }
 493
 494 static inline int64_t Swap_(int64_t value) {
 495     return Swap_(static_cast<uint64_t>(value));
 496 }
 497
 498 static bool little_(true);
 499
 500 static inline uint16_t Swap(uint16_t value) {
 501     return little_ ? Swap_(value) : value;
 502 }
 503
 504 static inline uint32_t Swap(uint32_t value) {
 505     return little_ ? Swap_(value) : value;
 506 }
 507
 508 static inline uint64_t Swap(uint64_t value) {
 509     return little_ ? Swap_(value) : value;
 510 }
 511
 512 static inline int16_t Swap(int16_t value) {
 513     return Swap(static_cast<uint16_t>(value));
 514 }
 515
 516 static inline int32_t Swap(int32_t value) {
 517     return Swap(static_cast<uint32_t>(value));
 518 }
 519
 520 static inline int64_t Swap(int64_t value) {
 521     return Swap(static_cast<uint64_t>(value));
 522 }
 523
 524 template <typename Target_>
 525 class Pointer;
 526
 527 class Swapped {
 528   protected:
 529     bool swapped_;
 530
 531     Swapped() :
 532         swapped_(false)
 533     {
 534     }
 535
 536   public:
 537     Swapped(bool swapped) :
 538         swapped_(swapped)
 539     {
 540     }
 541
 542     template <typename Type_>
 543     Type_ Swap(Type_ value) const {
 544         return swapped_ ? Swap_(value) : value;
 545     }
 546 };
 547
 548 class Data :
 549     public Swapped
 550 {
 551   private:
 552     void *base_;
 553     size_t size_;
 554
 555   public:
 556     Data(void *base, size_t size) :
 557         base_(base),
 558         size_(size)
 559     {
 560     }
 561
 562     void *GetBase() const {
 563         return base_;
 564     }
 565
 566     size_t GetSize() const {
 567         return size_;
 568     }
 569 };
 570
 571 class MachHeader :
 572     public Data
 573 {
 574   private:
 575     bool bits64_;
 576
 577     struct mach_header *mach_header_;
 578     struct load_command *load_command_;
 579
 580   public:
 581     MachHeader(void *base, size_t size) :
 582         Data(base, size)
 583     {
 584         mach_header_ = (mach_header *) base;
 585
 586         switch (Swap(mach_header_->magic)) {
 587             case MH_CIGAM:
 588                 swapped_ = !swapped_;
 589             case MH_MAGIC:
 590                 bits64_ = false;
 591             break;
 592
 593             case MH_CIGAM_64:
 594                 swapped_ = !swapped_;
 595             case MH_MAGIC_64:
 596                 bits64_ = true;
 597             break;
 598
 599             default:
 600                 _assert(false);
 601         }
 602
 603         void *post = mach_header_ + 1;
 604         if (bits64_)
 605             post = (uint32_t *) post + 1;
 606         load_command_ = (struct load_command *) post;
 607
 608         _assert(
 609             Swap(mach_header_->filetype) == MH_EXECUTE ||
 610             Swap(mach_header_->filetype) == MH_DYLIB ||
 611             Swap(mach_header_->filetype) == MH_BUNDLE
 612         );
 613     }
 614
 615     bool Bits64() const {
 616         return bits64_;
 617     }
 618
 619     struct mach_header *operator ->() const {
 620         return mach_header_;
 621     }
 622
 623     operator struct mach_header *() const {
 624         return mach_header_;
 625     }
 626
 627     uint32_t GetCPUType() const {
 628         return Swap(mach_header_->cputype);
 629     }
 630
 631     uint32_t GetCPUSubtype() const {
 632         return Swap(mach_header_->cpusubtype) & 0xff;
 633     }
 634
 635     struct load_command *GetLoadCommand() const {
 636         return load_command_;
 637     }
 638
 639     std::vector<struct load_command *> GetLoadCommands() const {
 640         std::vector<struct load_command *> load_commands;
 641
 642         struct load_command *load_command = load_command_;
 643         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 644             load_commands.push_back(load_command);
 645             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 646         }
 647
 648         return load_commands;
 649     }
 650
 651     std::vector<segment_command *> GetSegments(const char *segment_name) const {
 652         std::vector<struct segment_command *> segment_commands;
 653
 654         _foreach (load_command, GetLoadCommands()) {
 655             if (Swap(load_command->cmd) == LC_SEGMENT) {
 656                 segment_command *segment_command = reinterpret_cast<struct segment_command *>(load_command);
 657                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 658                     segment_commands.push_back(segment_command);
 659             }
 660         }
 661
 662         return segment_commands;
 663     }
 664
 665     std::vector<segment_command_64 *> GetSegments64(const char *segment_name) const {
 666         std::vector<struct segment_command_64 *> segment_commands;
 667
 668         _foreach (load_command, GetLoadCommands()) {
 669             if (Swap(load_command->cmd) == LC_SEGMENT_64) {
 670                 segment_command_64 *segment_command = reinterpret_cast<struct segment_command_64 *>(load_command);
 671                 if (strncmp(segment_command->segname, segment_name, 16) == 0)
 672                     segment_commands.push_back(segment_command);
 673             }
 674         }
 675
 676         return segment_commands;
 677     }
 678
 679     std::vector<section *> GetSections(const char *segment_name, const char *section_name) const {
 680         std::vector<section *> sections;
 681
 682         _foreach (segment, GetSegments(segment_name)) {
 683             section *section = (struct section *) (segment + 1);
 684
 685             uint32_t sect;
 686             for (sect = 0; sect != Swap(segment->nsects); ++sect) {
 687                 if (strncmp(section->sectname, section_name, 16) == 0)
 688                     sections.push_back(section);
 689                 ++section;
 690             }
 691         }
 692
 693         return sections;
 694     }
 695
 696     template <typename Target_>
 697     Pointer<Target_> GetPointer(uint32_t address, const char *segment_name = NULL) const {
 698         load_command *load_command = (struct load_command *) (mach_header_ + 1);
 699         uint32_t cmd;
 700
 701         for (cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 702             if (Swap(load_command->cmd) == LC_SEGMENT) {
 703                 segment_command *segment_command = (struct segment_command *) load_command;
 704                 if (segment_name != NULL && strncmp(segment_command->segname, segment_name, 16) != 0)
 705                     goto next_command;
 706
 707                 section *sections = (struct section *) (segment_command + 1);
 708
 709                 uint32_t sect;
 710                 for (sect = 0; sect != Swap(segment_command->nsects); ++sect) {
 711                     section *section = &sections[sect];
 712                     //printf("%s %u %p %p %u\n", segment_command->segname, sect, address, section->addr, section->size);
 713                     if (address >= Swap(section->addr) && address < Swap(section->addr) + Swap(section->size)) {
 714                         //printf("0x%.8x %s\n", address, segment_command->segname);
 715                         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(address - Swap(section->addr) + Swap(section->offset) + (char *) mach_header_));
 716                     }
 717                 }
 718             }
 719
 720           next_command:
 721             load_command = (struct load_command *) ((char *) load_command + Swap(load_command->cmdsize));
 722         }
 723
 724         return Pointer<Target_>(this);
 725     }
 726
 727     template <typename Target_>
 728     Pointer<Target_> GetOffset(uint32_t offset) {
 729         return Pointer<Target_>(this, reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_));
 730     }
 731 };
 732
 733 class FatMachHeader :
 734     public MachHeader
 735 {
 736   private:
 737     fat_arch *fat_arch_;
 738
 739   public:
 740     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 741         MachHeader(base, size),
 742         fat_arch_(fat_arch)
 743     {
 744     }
 745
 746     fat_arch *GetFatArch() const {
 747         return fat_arch_;
 748     }
 749 };
 750
 751 class FatHeader :
 752     public Data
 753 {
 754   private:
 755     fat_header *fat_header_;
 756     std::vector<FatMachHeader> mach_headers_;
 757
 758   public:
 759     FatHeader(void *base, size_t size) :
 760         Data(base, size)
 761     {
 762         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 763
 764         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 765             swapped_ = !swapped_;
 766             goto fat;
 767         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 768             fat_header_ = NULL;
 769             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 770         } else fat: {
 771             size_t fat_narch = Swap(fat_header_->nfat_arch);
 772             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 773             size_t arch;
 774             for (arch = 0; arch != fat_narch; ++arch) {
 775                 uint32_t arch_offset = Swap(fat_arch->offset);
 776                 uint32_t arch_size = Swap(fat_arch->size);
 777                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 778                 ++fat_arch;
 779             }
 780         }
 781     }
 782
 783     std::vector<FatMachHeader> &GetMachHeaders() {
 784         return mach_headers_;
 785     }
 786
 787     bool IsFat() const {
 788         return fat_header_ != NULL;
 789     }
 790
 791     struct fat_header *operator ->() const {
 792         return fat_header_;
 793     }
 794
 795     operator struct fat_header *() const {
 796         return fat_header_;
 797     }
 798 };
 799
 800 template <typename Target_>
 801 class Pointer {
 802   private:
 803     const MachHeader *framework_;
 804     const Target_ *pointer_;
 805
 806   public:
 807     Pointer(const MachHeader *framework = NULL, const Target_ *pointer = NULL) :
 808         framework_(framework),
 809         pointer_(pointer)
 810     {
 811     }
 812
 813     operator const Target_ *() const {
 814         return pointer_;
 815     }
 816
 817     const Target_ *operator ->() const {
 818         return pointer_;
 819     }
 820
 821     Pointer<Target_> &operator ++() {
 822         ++pointer_;
 823         return *this;
 824     }
 825
 826     template <typename Value_>
 827     Value_ Swap(Value_ value) {
 828         return framework_->Swap(value);
 829     }
 830 };
 831
 832 #define CSMAGIC_REQUIREMENT            uint32_t(0xfade0c00)
 833 #define CSMAGIC_REQUIREMENTS           uint32_t(0xfade0c01)
 834 #define CSMAGIC_CODEDIRECTORY          uint32_t(0xfade0c02)
 835 #define CSMAGIC_EMBEDDED_SIGNATURE     uint32_t(0xfade0cc0)
 836 #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02)
 837 #define CSMAGIC_EMBEDDED_ENTITLEMENTS  uint32_t(0xfade7171)
 838 #define CSMAGIC_DETACHED_SIGNATURE     uint32_t(0xfade0cc1)
 839 #define CSMAGIC_BLOBWRAPPER            uint32_t(0xfade0b01)
 840
 841 #define CSSLOT_CODEDIRECTORY uint32_t(0x00000)
 842 #define CSSLOT_INFOSLOT      uint32_t(0x00001)
 843 #define CSSLOT_REQUIREMENTS  uint32_t(0x00002)
 844 #define CSSLOT_RESOURCEDIR   uint32_t(0x00003)
 845 #define CSSLOT_APPLICATION   uint32_t(0x00004)
 846 #define CSSLOT_ENTITLEMENTS  uint32_t(0x00005)
 847
 848 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 849
 850 #define CS_HASHTYPE_SHA1 1
 851
 852 struct BlobIndex {
 853     uint32_t type;
 854     uint32_t offset;
 855 } _packed;
 856
 857 struct Blob {
 858     uint32_t magic;
 859     uint32_t length;
 860 } _packed;
 861
 862 struct SuperBlob {
 863     struct Blob blob;
 864     uint32_t count;
 865     struct BlobIndex index[];
 866 } _packed;
 867
 868 struct CodeDirectory {
 869     uint32_t version;
 870     uint32_t flags;
 871     uint32_t hashOffset;
 872     uint32_t identOffset;
 873     uint32_t nSpecialSlots;
 874     uint32_t nCodeSlots;
 875     uint32_t codeLimit;
 876     uint8_t hashSize;
 877     uint8_t hashType;
 878     uint8_t spare1;
 879     uint8_t pageSize;
 880     uint32_t spare2;
 881 } _packed;
 882
 883 #ifndef LDID_NOFLAGT
 884 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 885 #endif
 886
 887 static void sha1(uint8_t *hash, const void *data, size_t size) {
 888     LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 889 }
 890
 891 struct CodesignAllocation {
 892     FatMachHeader mach_header_;
 893     uint32_t offset_;
 894     uint32_t size_;
 895     uint32_t limit_;
 896     uint32_t alloc_;
 897     uint32_t align_;
 898
 899     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
 900         mach_header_(mach_header),
 901         offset_(offset),
 902         size_(size),
 903         limit_(limit),
 904         alloc_(alloc),
 905         align_(align)
 906     {
 907     }
 908 };
 909
 910 class File {
 911   private:
 912     int file_;
 913
 914   public:
 915     File() :
 916         file_(-1)
 917     {
 918     }
 919
 920     ~File() {
 921         if (file_ != -1)
 922             _syscall(close(file_));
 923     }
 924
 925     void open(const char *path, int flags) {
 926         _assert(file_ == -1);
 927         file_ = _syscall(::open(path, flags));
 928     }
 929
 930     int file() const {
 931         return file_;
 932     }
 933 };
 934
 935 class Map {
 936   private:
 937     File file_;
 938     void *data_;
 939     size_t size_;
 940
 941     void clear() {
 942         if (data_ == NULL)
 943             return;
 944         _syscall(munmap(data_, size_));
 945         data_ = NULL;
 946         size_ = 0;
 947     }
 948
 949   public:
 950     Map() :
 951         data_(NULL),
 952         size_(0)
 953     {
 954     }
 955
 956     Map(const std::string &path, int oflag, int pflag, int mflag) :
 957         Map()
 958     {
 959         open(path, oflag, pflag, mflag);
 960     }
 961
 962     Map(const std::string &path, bool edit) :
 963         Map()
 964     {
 965         open(path, edit);
 966     }
 967
 968     ~Map() {
 969         clear();
 970     }
 971
 972     bool empty() const {
 973         return data_ == NULL;
 974     }
 975
 976     void open(const std::string &path, int oflag, int pflag, int mflag) {
 977         clear();
 978
 979         file_.open(path.c_str(), oflag);
 980         int file(file_.file());
 981
 982         struct stat stat;
 983         _syscall(fstat(file, &stat));
 984         size_ = stat.st_size;
 985
 986         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
 987     }
 988
 989     void open(const std::string &path, bool edit) {
 990         if (edit)
 991             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
 992         else
 993             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
 994     }
 995
 996     void *data() const {
 997         return data_;
 998     }
 999
1000     size_t size() const {
1001         return size_;
1002     }
1003
1004     operator std::string() const {
1005         return std::string(static_cast<char *>(data_), size_);
1006     }
1007 };
1008
1009 namespace ldid {
1010
1011 static void Allocate(const void *idata, size_t isize, std::streambuf &output, const Functor<size_t (size_t)> &allocate, const Functor<size_t (std::streambuf &output, size_t, const std::string &, const char *)> &save) {
1012     FatHeader source(const_cast<void *>(idata), isize);
1013
1014     size_t offset(0);
1015     if (source.IsFat())
1016         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
1017
1018     std::vector<CodesignAllocation> allocations;
1019     _foreach (mach_header, source.GetMachHeaders()) {
1020         struct linkedit_data_command *signature(NULL);
1021         struct symtab_command *symtab(NULL);
1022
1023         _foreach (load_command, mach_header.GetLoadCommands()) {
1024             uint32_t cmd(mach_header.Swap(load_command->cmd));
1025             if (false);
1026             else if (cmd == LC_CODE_SIGNATURE)
1027                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1028             else if (cmd == LC_SYMTAB)
1029                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
1030         }
1031
1032         size_t size;
1033         if (signature == NULL)
1034             size = mach_header.GetSize();
1035         else {
1036             size = mach_header.Swap(signature->dataoff);
1037             _assert(size <= mach_header.GetSize());
1038         }
1039
1040         if (symtab != NULL) {
1041             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
1042             _assert(end <= size);
1043             _assert(end >= size - 0x10);
1044             size = end;
1045         }
1046
1047         size_t alloc(allocate(size));
1048
1049         auto *fat_arch(mach_header.GetFatArch());
1050         uint32_t align(fat_arch == NULL ? 0 : source.Swap(fat_arch->align));
1051         offset = Align(offset, 1 << align);
1052
1053         uint32_t limit(size);
1054         if (alloc != 0)
1055             limit = Align(limit, 0x10);
1056
1057         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
1058         offset += size + alloc;
1059         offset = Align(offset, 0x10);
1060     }
1061
1062     size_t position(0);
1063
1064     if (source.IsFat()) {
1065         fat_header fat_header;
1066         fat_header.magic = Swap(FAT_MAGIC);
1067         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1068         put(output, &fat_header, sizeof(fat_header));
1069         position += sizeof(fat_header);
1070
1071         _foreach (allocation, allocations) {
1072             auto &mach_header(allocation.mach_header_);
1073
1074             fat_arch fat_arch;
1075             fat_arch.cputype = Swap(mach_header->cputype);
1076             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1077             fat_arch.offset = Swap(allocation.offset_);
1078             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1079             fat_arch.align = Swap(allocation.align_);
1080             put(output, &fat_arch, sizeof(fat_arch));
1081             position += sizeof(fat_arch);
1082         }
1083     }
1084
1085     _foreach (allocation, allocations) {
1086         auto &mach_header(allocation.mach_header_);
1087
1088         pad(output, allocation.offset_ - position);
1089         position = allocation.offset_;
1090
1091         std::vector<std::string> commands;
1092
1093         _foreach (load_command, mach_header.GetLoadCommands()) {
1094             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1095
1096             switch (mach_header.Swap(load_command->cmd)) {
1097                 case LC_CODE_SIGNATURE:
1098                     continue;
1099                 break;
1100
1101                 case LC_SEGMENT: {
1102                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1103                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1104                         break;
1105                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1106                     segment_command->filesize = size;
1107                     segment_command->vmsize = Align(size, PageSize_);
1108                 } break;
1109
1110                 case LC_SEGMENT_64: {
1111                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1112                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1113                         break;
1114                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1115                     segment_command->filesize = size;
1116                     segment_command->vmsize = Align(size, PageSize_);
1117                 } break;
1118             }
1119
1120             commands.push_back(copy);
1121         }
1122
1123         if (allocation.alloc_ != 0) {
1124             linkedit_data_command signature;
1125             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1126             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1127             signature.dataoff = mach_header.Swap(allocation.limit_);
1128             signature.datasize = mach_header.Swap(allocation.alloc_);
1129             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1130         }
1131
1132         size_t begin(position);
1133
1134         uint32_t after(0);
1135         _foreach(command, commands)
1136             after += command.size();
1137
1138         std::stringbuf altern;
1139
1140         struct mach_header header(*mach_header);
1141         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1142         header.sizeofcmds = mach_header.Swap(after);
1143         put(output, &header, sizeof(header));
1144         put(altern, &header, sizeof(header));
1145         position += sizeof(header);
1146
1147         if (mach_header.Bits64()) {
1148             auto pad(mach_header.Swap(uint32_t(0)));
1149             put(output, &pad, sizeof(pad));
1150             put(altern, &pad, sizeof(pad));
1151             position += sizeof(pad);
1152         }
1153
1154         _foreach(command, commands) {
1155             put(output, command.data(), command.size());
1156             put(altern, command.data(), command.size());
1157             position += command.size();
1158         }
1159
1160         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1161         if (before > after) {
1162             pad(output, before - after);
1163             pad(altern, before - after);
1164             position += before - after;
1165         }
1166
1167         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1168
1169         std::string overlap(altern.str());
1170         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1171
1172         put(output, top + (position - begin), allocation.size_ - (position - begin));
1173         position = begin + allocation.size_;
1174
1175         pad(output, allocation.limit_ - allocation.size_);
1176         position += allocation.limit_ - allocation.size_;
1177
1178         size_t saved(save(output, allocation.limit_, overlap, top));
1179         if (allocation.alloc_ > saved)
1180             pad(output, allocation.alloc_ - saved);
1181         position += allocation.alloc_;
1182     }
1183 }
1184
1185 }
1186
1187 typedef std::map<uint32_t, std::string> Blobs;
1188
1189 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1190     auto value(buffer.str());
1191     std::swap(blobs[slot], value);
1192 }
1193
1194 static void insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1195     auto value(buffer.str());
1196     Blob blob;
1197     blob.magic = Swap(magic);
1198     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1199     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1200     std::swap(blobs[slot], value);
1201 }
1202
1203 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1204     size_t total(0);
1205     _foreach (blob, blobs)
1206         total += blob.second.size();
1207
1208     struct SuperBlob super;
1209     super.blob.magic = Swap(magic);
1210     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1211     super.count = Swap(uint32_t(blobs.size()));
1212     put(output, &super, sizeof(super));
1213
1214     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1215
1216     _foreach (blob, blobs) {
1217         BlobIndex index;
1218         index.type = Swap(blob.first);
1219         index.offset = Swap(uint32_t(offset));
1220         put(output, &index, sizeof(index));
1221         offset += blob.second.size();
1222     }
1223
1224     _foreach (blob, blobs)
1225         put(output, blob.second.data(), blob.second.size());
1226
1227     return offset;
1228 }
1229
1230 #ifndef LDID_NOSMIME
1231 class Buffer {
1232   private:
1233     BIO *bio_;
1234
1235   public:
1236     Buffer(BIO *bio) :
1237         bio_(bio)
1238     {
1239         _assert(bio_ != NULL);
1240     }
1241
1242     Buffer() :
1243         bio_(BIO_new(BIO_s_mem()))
1244     {
1245     }
1246
1247     Buffer(const char *data, size_t size) :
1248         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1249     {
1250     }
1251
1252     Buffer(const std::string &data) :
1253         Buffer(data.data(), data.size())
1254     {
1255     }
1256
1257     Buffer(PKCS7 *pkcs) :
1258         Buffer()
1259     {
1260         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1261     }
1262
1263     ~Buffer() {
1264         BIO_free_all(bio_);
1265     }
1266
1267     operator BIO *() const {
1268         return bio_;
1269     }
1270
1271     explicit operator std::string() const {
1272         char *data;
1273         auto size(BIO_get_mem_data(bio_, &data));
1274         return std::string(data, size);
1275     }
1276 };
1277
1278 class Stuff {
1279   private:
1280     PKCS12 *value_;
1281     EVP_PKEY *key_;
1282     X509 *cert_;
1283     STACK_OF(X509) *ca_;
1284
1285   public:
1286     Stuff(BIO *bio) :
1287         value_(d2i_PKCS12_bio(bio, NULL)),
1288         ca_(NULL)
1289     {
1290         _assert(value_ != NULL);
1291         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1292         _assert(key_ != NULL);
1293         _assert(cert_ != NULL);
1294     }
1295
1296     Stuff(const std::string &data) :
1297         Stuff(Buffer(data))
1298     {
1299     }
1300
1301     ~Stuff() {
1302         sk_X509_pop_free(ca_, X509_free);
1303         X509_free(cert_);
1304         EVP_PKEY_free(key_);
1305         PKCS12_free(value_);
1306     }
1307
1308     operator PKCS12 *() const {
1309         return value_;
1310     }
1311
1312     operator EVP_PKEY *() const {
1313         return key_;
1314     }
1315
1316     operator X509 *() const {
1317         return cert_;
1318     }
1319
1320     operator STACK_OF(X509) *() const {
1321         return ca_;
1322     }
1323 };
1324
1325 class Signature {
1326   private:
1327     PKCS7 *value_;
1328
1329   public:
1330     Signature(const Stuff &stuff, const Buffer &data) :
1331         value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED))
1332     {
1333         _assert(value_ != NULL);
1334     }
1335
1336     ~Signature() {
1337         PKCS7_free(value_);
1338     }
1339
1340     operator PKCS7 *() const {
1341         return value_;
1342     }
1343 };
1344 #endif
1345
1346 class NullBuffer :
1347     public std::streambuf
1348 {
1349   public:
1350     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1351         return size;
1352     }
1353
1354     virtual int_type overflow(int_type next) {
1355         return next;
1356     }
1357 };
1358
1359 class HashBuffer :
1360     public std::streambuf
1361 {
1362   private:
1363     std::vector<char> &hash_;
1364     LDID_SHA1_CTX context_;
1365
1366   public:
1367     HashBuffer(std::vector<char> &hash) :
1368         hash_(hash)
1369     {
1370         LDID_SHA1_Init(&context_);
1371     }
1372
1373     ~HashBuffer() {
1374         hash_.resize(LDID_SHA1_DIGEST_LENGTH);
1375         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.data()), &context_);
1376     }
1377
1378     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1379         LDID_SHA1_Update(&context_, data, size);
1380         return size;
1381     }
1382
1383     virtual int_type overflow(int_type next) {
1384         if (next == traits_type::eof())
1385             return sync();
1386         char value(next);
1387         xsputn(&value, 1);
1388         return next;
1389     }
1390 };
1391
1392 class HashProxy :
1393     public HashBuffer
1394 {
1395   private:
1396     std::streambuf &buffer_;
1397
1398   public:
1399     HashProxy(std::vector<char> &hash, std::streambuf &buffer) :
1400         HashBuffer(hash),
1401         buffer_(buffer)
1402     {
1403     }
1404
1405     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1406         _assert(HashBuffer::xsputn(data, size) == size);
1407         return buffer_.sputn(data, size);
1408     }
1409 };
1410
1411 static bool Starts(const std::string &lhs, const std::string &rhs) {
1412     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1413 }
1414
1415 class Split {
1416   public:
1417     std::string dir;
1418     std::string base;
1419
1420     Split(const std::string &path) {
1421         size_t slash(path.rfind('/'));
1422         if (slash == std::string::npos)
1423             base = path;
1424         else {
1425             dir = path.substr(0, slash + 1);
1426             base = path.substr(slash + 1);
1427         }
1428     }
1429 };
1430
1431 static void mkdir_p(const std::string &path) {
1432     if (path.empty())
1433         return;
1434 #ifdef __WIN32__
1435     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1436         return;
1437 #else
1438     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1439         return;
1440 #endif
1441     auto slash(path.rfind('/', path.size() - 1));
1442     if (slash == std::string::npos)
1443         return;
1444     mkdir_p(path.substr(0, slash));
1445 }
1446
1447 static std::string Temporary(std::filebuf &file, const Split &split) {
1448     std::string temp(split.dir + ".ldid." + split.base);
1449     mkdir_p(split.dir);
1450     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1451     return temp;
1452 }
1453
1454 static void Commit(const std::string &path, const std::string &temp) {
1455     struct stat info;
1456     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1457 #ifndef __WIN32__
1458         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1459 #endif
1460         _syscall(chmod(temp.c_str(), info.st_mode));
1461     }
1462
1463     _syscall(rename(temp.c_str(), path.c_str()));
1464 }
1465
1466 namespace ldid {
1467
1468 void Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &key, const Slots &slots) {
1469     Allocate(idata, isize, output, fun([&](size_t size) -> size_t {
1470         size_t alloc(sizeof(struct SuperBlob));
1471
1472         uint32_t special(0);
1473
1474         special = std::max(special, CSSLOT_REQUIREMENTS);
1475         alloc += sizeof(struct BlobIndex);
1476         alloc += 0xc;
1477
1478         if (!entitlements.empty()) {
1479             special = std::max(special, CSSLOT_ENTITLEMENTS);
1480             alloc += sizeof(struct BlobIndex);
1481             alloc += sizeof(struct Blob);
1482             alloc += entitlements.size();
1483         }
1484
1485         special = std::max(special, CSSLOT_CODEDIRECTORY);
1486         alloc += sizeof(struct BlobIndex);
1487         alloc += sizeof(struct Blob);
1488         alloc += sizeof(struct CodeDirectory);
1489         alloc += identifier.size() + 1;
1490
1491         if (!key.empty()) {
1492             alloc += sizeof(struct BlobIndex);
1493             alloc += sizeof(struct Blob);
1494             // XXX: this is just a "sufficiently large number"
1495             alloc += 0x3000;
1496         }
1497
1498         _foreach (slot, slots)
1499             special = std::max(special, slot.first);
1500
1501         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1502         alloc = Align(alloc + (special + normal) * LDID_SHA1_DIGEST_LENGTH, 16);
1503         return alloc;
1504     }), fun([&](std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1505         Blobs blobs;
1506
1507         if (true) {
1508             std::stringbuf data;
1509
1510             Blobs requirements;
1511             put(data, CSMAGIC_REQUIREMENTS, requirements);
1512
1513             insert(blobs, CSSLOT_REQUIREMENTS, data);
1514         }
1515
1516         if (!entitlements.empty()) {
1517             std::stringbuf data;
1518             put(data, entitlements.data(), entitlements.size());
1519             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1520         }
1521
1522         if (true) {
1523             std::stringbuf data;
1524
1525             uint32_t special(0);
1526             _foreach (blob, blobs)
1527                 special = std::max(special, blob.first);
1528             _foreach (slot, slots)
1529                 special = std::max(special, slot.first);
1530             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1531
1532             CodeDirectory directory;
1533             directory.version = Swap(uint32_t(0x00020001));
1534             directory.flags = Swap(uint32_t(0));
1535             directory.hashOffset = Swap(uint32_t(sizeof(Blob) + sizeof(CodeDirectory) + identifier.size() + 1 + LDID_SHA1_DIGEST_LENGTH * special));
1536             directory.identOffset = Swap(uint32_t(sizeof(Blob) + sizeof(CodeDirectory)));
1537             directory.nSpecialSlots = Swap(special);
1538             directory.codeLimit = Swap(uint32_t(limit));
1539             directory.nCodeSlots = Swap(normal);
1540             directory.hashSize = LDID_SHA1_DIGEST_LENGTH;
1541             directory.hashType = CS_HASHTYPE_SHA1;
1542             directory.spare1 = 0x00;
1543             directory.pageSize = PageShift_;
1544             directory.spare2 = Swap(uint32_t(0));
1545             put(data, &directory, sizeof(directory));
1546
1547             put(data, identifier.c_str(), identifier.size() + 1);
1548
1549             uint8_t storage[special + normal][LDID_SHA1_DIGEST_LENGTH];
1550             uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = storage + special;
1551
1552             memset(storage, 0, sizeof(*storage) * special);
1553
1554             _foreach (blob, blobs) {
1555                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1556                 sha1((uint8_t *) (hashes - blob.first), local, Swap(local->length));
1557             }
1558
1559             _foreach (slot, slots) {
1560                 _assert(sizeof(*hashes) == slot.second.size());
1561                 memcpy(hashes - slot.first, slot.second.data(), slot.second.size());
1562             }
1563
1564             if (normal != 1)
1565                 for (size_t i = 0; i != normal - 1; ++i)
1566                     sha1(hashes[i], (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1567             if (normal != 0)
1568                 sha1(hashes[normal - 1], top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1569
1570             put(data, storage, sizeof(storage));
1571
1572             insert(blobs, CSSLOT_CODEDIRECTORY, CSMAGIC_CODEDIRECTORY, data);
1573         }
1574
1575 #ifndef LDID_NOSMIME
1576         if (!key.empty()) {
1577             std::stringbuf data;
1578             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1579
1580             Stuff stuff(key);
1581             Buffer bio(sign);
1582
1583             Signature signature(stuff, sign);
1584             Buffer result(signature);
1585             std::string value(result);
1586             put(data, value.data(), value.size());
1587
1588             insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data);
1589         }
1590 #endif
1591
1592         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1593     }));
1594 }
1595
1596 static void Unsign(void *idata, size_t isize, std::streambuf &output) {
1597     Allocate(idata, isize, output, fun([](size_t size) -> size_t {
1598         return 0;
1599     }), fun([](std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1600         return 0;
1601     }));
1602 }
1603
1604 std::string DiskFolder::Path(const std::string &path) {
1605     return path_ + "/" + path;
1606 }
1607
1608 DiskFolder::DiskFolder(const std::string &path) :
1609     path_(path)
1610 {
1611 }
1612
1613 DiskFolder::~DiskFolder() {
1614     if (!std::uncaught_exception())
1615         for (const auto &commit : commit_)
1616             Commit(commit.first, commit.second);
1617 }
1618
1619 void DiskFolder::Find(const std::string &root, const std::string &base, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)>&code) {
1620     std::string path(Path(root) + base);
1621
1622     DIR *dir(opendir(path.c_str()));
1623     _assert(dir != NULL);
1624     _scope({ _syscall(closedir(dir)); });
1625
1626     while (auto child = readdir(dir)) {
1627         std::string name(child->d_name);
1628         if (name == "." || name == "..")
1629             continue;
1630         if (Starts(name, ".ldid."))
1631             continue;
1632
1633         bool directory;
1634
1635 #ifdef __WIN32__
1636         struct stat info;
1637         _syscall(stat(path.c_str(), &info));
1638         if (false);
1639         else if (S_ISDIR(info.st_mode))
1640             directory = true;
1641         else if (S_ISREG(info.st_mode))
1642             directory = false;
1643         else
1644             _assert_(false, "st_mode=%x", info.st_mode);
1645 #else
1646         switch (child->d_type) {
1647             case DT_DIR:
1648                 directory = true;
1649                 break;
1650             case DT_REG:
1651                 directory = false;
1652                 break;
1653             default:
1654                 _assert_(false, "d_type=%u", child->d_type);
1655         }
1656 #endif
1657
1658         if (directory)
1659             Find(root, base + name + "/", code);
1660         else
1661             code(base + name, fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1662                 std::string access(root + base + name);
1663                 _assert_(Open(access, fun([&](std::streambuf &data) {
1664                     NullBuffer save;
1665                     code(data, save);
1666                 })), "open(): %s", access.c_str());
1667             }));
1668     }
1669 }
1670
1671 void DiskFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1672     std::filebuf save;
1673     auto from(Path(path));
1674     commit_[from] = Temporary(save, from);
1675     code(save);
1676 }
1677
1678 bool DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1679     std::filebuf data;
1680     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
1681     if (result == NULL)
1682         return false;
1683     _assert(result == &data);
1684     code(data);
1685     return true;
1686 }
1687
1688 void DiskFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)>&code) {
1689     Find(path, "", code);
1690 }
1691
1692 SubFolder::SubFolder(Folder &parent, const std::string &path) :
1693     parent_(parent),
1694     path_(path)
1695 {
1696 }
1697
1698 void SubFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1699     return parent_.Save(path_ + path, code);
1700 }
1701
1702 bool SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1703     return parent_.Open(path_ + path, code);
1704 }
1705
1706 void SubFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1707     return parent_.Find(path_ + path, code);
1708 }
1709
1710 UnionFolder::UnionFolder(Folder &parent) :
1711     parent_(parent)
1712 {
1713 }
1714
1715 void UnionFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1716     return parent_.Save(path, code);
1717 }
1718
1719 bool UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1720     auto file(files_.find(path));
1721     if (file == files_.end())
1722         return parent_.Open(path, code);
1723
1724     auto &data(file->second);
1725     data.pubseekpos(0, std::ios::in);
1726     code(data);
1727     return true;
1728 }
1729
1730 void UnionFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1731     parent_.Find(path, fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &save) {
1732         if (files_.find(name) == files_.end())
1733             code(name, save);
1734     }));
1735
1736     for (auto &file : files_)
1737         code(file.first, fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1738             parent_.Save(file.first, fun([&](std::streambuf &save) {
1739                 file.second.pubseekpos(0, std::ios::in);
1740                 code(file.second, save);
1741             }));
1742         }));
1743 }
1744
1745 static size_t copy(std::streambuf &source, std::streambuf &target) {
1746     size_t total(0);
1747     for (;;) {
1748         char data[4096];
1749         size_t writ(source.sgetn(data, sizeof(data)));
1750         if (writ == 0)
1751             break;
1752         _assert(target.sputn(data, writ) == writ);
1753         total += writ;
1754     }
1755     return total;
1756 }
1757
1758 #ifndef LDID_NOPLIST
1759 static plist_t plist(const std::string &data) {
1760     plist_t plist(NULL);
1761     if (Starts(data, "bplist00"))
1762         plist_from_bin(data.data(), data.size(), &plist);
1763     else
1764         plist_from_xml(data.data(), data.size(), &plist);
1765     _assert(plist != NULL);
1766     return plist;
1767 }
1768
1769 static void plist_d(std::streambuf &buffer, const Functor<void (plist_t)> &code) {
1770     std::stringbuf data;
1771     copy(buffer, data);
1772     auto node(plist(data.str()));
1773     _scope({ plist_free(node); });
1774     _assert(plist_get_node_type(node) == PLIST_DICT);
1775     code(node);
1776 }
1777
1778 static std::string plist_s(plist_t node) {
1779     _assert(node != NULL);
1780     _assert(plist_get_node_type(node) == PLIST_STRING);
1781     char *data;
1782     plist_get_string_val(node, &data);
1783     _scope({ free(data); });
1784     return data;
1785 }
1786 #endif
1787
1788 enum Mode {
1789     NoMode,
1790     OptionalMode,
1791     OmitMode,
1792     NestedMode,
1793     TopMode,
1794 };
1795
1796 class Expression {
1797   private:
1798     regex_t regex_;
1799
1800   public:
1801     Expression(const std::string &code) {
1802         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED | REG_NOSUB) == 0, "regcomp()");
1803     }
1804
1805     ~Expression() {
1806         regfree(&regex_);
1807     }
1808
1809     bool operator ()(const std::string &data) const {
1810         auto value(regexec(&regex_, data.c_str(), 0, NULL, 0));
1811         if (value == REG_NOMATCH)
1812             return false;
1813         _assert_(value == 0, "regexec()");
1814         return true;
1815     }
1816 };
1817
1818 struct Rule {
1819     unsigned weight_;
1820     Mode mode_;
1821     std::string code_;
1822
1823     mutable std::auto_ptr<Expression> regex_;
1824
1825     Rule(unsigned weight, Mode mode, const std::string &code) :
1826         weight_(weight),
1827         mode_(mode),
1828         code_(code)
1829     {
1830     }
1831
1832     Rule(const Rule &rhs) :
1833         weight_(rhs.weight_),
1834         mode_(rhs.mode_),
1835         code_(rhs.code_)
1836     {
1837     }
1838
1839     void Compile() const {
1840         regex_.reset(new Expression(code_));
1841     }
1842
1843     bool operator ()(const std::string &data) const {
1844         _assert(regex_.get() != NULL);
1845         return (*regex_)(data);
1846     }
1847
1848     bool operator <(const Rule &rhs) const {
1849         if (weight_ > rhs.weight_)
1850             return true;
1851         if (weight_ < rhs.weight_)
1852             return false;
1853         return mode_ > rhs.mode_;
1854     }
1855 };
1856
1857 struct RuleCode {
1858     bool operator ()(const Rule *lhs, const Rule *rhs) const {
1859         return lhs->code_ < rhs->code_;
1860     }
1861 };
1862
1863 #ifndef LDID_NOPLIST
1864 std::string Bundle(const std::string &root, Folder &folder, const std::string &key, std::map<std::string, std::vector<char>> &remote, const std::string &entitlements) {
1865     std::string executable;
1866     std::string identifier;
1867
1868     static const std::string info("Info.plist");
1869
1870     _assert_(folder.Open(info, fun([&](std::streambuf &buffer) {
1871         plist_d(buffer, fun([&](plist_t node) {
1872             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
1873             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
1874         }));
1875     })), "open(): Info.plist");
1876
1877     std::map<std::string, std::multiset<Rule>> versions;
1878
1879     auto &rules1(versions[""]);
1880     auto &rules2(versions["2"]);
1881
1882     static const std::string signature("_CodeSignature/CodeResources");
1883
1884     folder.Open(signature, fun([&](std::streambuf &buffer) {
1885         plist_d(buffer, fun([&](plist_t node) {
1886             // XXX: maybe attempt to preserve existing rules
1887         }));
1888     }));
1889
1890     if (true) {
1891         rules1.insert(Rule{1, NoMode, "^"});
1892         rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1893         rules1.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
1894         rules1.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
1895         rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1896         rules1.insert(Rule{1, NoMode, "^version.plist$"});
1897     }
1898
1899     if (true) {
1900         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
1901         rules2.insert(Rule{20, NoMode, "^"});
1902         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
1903         rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1904         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
1905         rules2.insert(Rule{1, NoMode, "^.*"});
1906         rules2.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
1907         rules2.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
1908         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
1909         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
1910         rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1911         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
1912         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
1913         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
1914     }
1915
1916     std::map<std::string, std::vector<char>> local;
1917
1918     static Expression nested("^PlugIns/[^/]*\\.appex/Info\\.plist$");
1919
1920     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
1921         if (!nested(name))
1922             return;
1923         auto bundle(root + Split(name).dir);
1924         SubFolder subfolder(folder, bundle);
1925         Bundle(bundle, subfolder, key, local, "");
1926     }));
1927
1928     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
1929         if (name == executable || name == signature)
1930             return;
1931
1932         auto &hash(local[name]);
1933         if (!hash.empty())
1934             return;
1935
1936         code(fun([&](std::streambuf &data, std::streambuf &save) {
1937             HashProxy proxy(hash, save);
1938             copy(data, proxy);
1939         }));
1940
1941         _assert(hash.size() == LDID_SHA1_DIGEST_LENGTH);
1942     }));
1943
1944     auto plist(plist_new_dict());
1945     _scope({ plist_free(plist); });
1946
1947     for (const auto &version : versions) {
1948         auto files(plist_new_dict());
1949         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
1950
1951         for (const auto &rule : version.second)
1952             rule.Compile();
1953
1954         for (const auto &hash : local)
1955             for (const auto &rule : version.second)
1956                 if (rule(hash.first)) {
1957                     if (rule.mode_ == NoMode)
1958                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(hash.second.data(), hash.second.size()));
1959                     else if (rule.mode_ == OptionalMode) {
1960                         auto entry(plist_new_dict());
1961                         plist_dict_set_item(entry, "hash", plist_new_data(hash.second.data(), hash.second.size()));
1962                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
1963                         plist_dict_set_item(files, hash.first.c_str(), entry);
1964                     }
1965
1966                     break;
1967                 }
1968     }
1969
1970     for (const auto &version : versions) {
1971         auto rules(plist_new_dict());
1972         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
1973
1974         std::multiset<const Rule *, RuleCode> ordered;
1975         for (const auto &rule : version.second)
1976             ordered.insert(&rule);
1977
1978         for (const auto &rule : ordered)
1979             if (rule->weight_ == 1 && rule->mode_ == NoMode)
1980                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
1981             else {
1982                 auto entry(plist_new_dict());
1983                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
1984
1985                 switch (rule->mode_) {
1986                     case NoMode:
1987                         break;
1988                     case OmitMode:
1989                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
1990                         break;
1991                     case OptionalMode:
1992                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
1993                         break;
1994                     case NestedMode:
1995                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
1996                         break;
1997                     case TopMode:
1998                         plist_dict_set_item(entry, "top", plist_new_bool(true));
1999                         break;
2000                 }
2001
2002                 if (rule->weight_ >= 10000)
2003                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2004                 else if (rule->weight_ != 1)
2005                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2006             }
2007     }
2008
2009     folder.Save(signature, fun([&](std::streambuf &save) {
2010         HashProxy proxy(local[signature], save);
2011         char *xml(NULL);
2012         uint32_t size;
2013         plist_to_xml(plist, &xml, &size);
2014         _scope({ free(xml); });
2015         put(proxy, xml, size);
2016     }));
2017
2018     folder.Open(executable, fun([&](std::streambuf &buffer) {
2019         // XXX: this is a miserable fail
2020         std::stringbuf temp;
2021         copy(buffer, temp);
2022         auto data(temp.str());
2023
2024         folder.Save(executable, fun([&](std::streambuf &save) {
2025             Slots slots;
2026             slots[1] = local.at(info);
2027             slots[3] = local.at(signature);
2028
2029             HashProxy proxy(local[executable], save);
2030             Sign(data.data(), data.size(), proxy, identifier, entitlements, key, slots);
2031         }));
2032     }));
2033
2034     for (const auto &hash : local)
2035         remote[root + hash.first] = hash.second;
2036
2037     return executable;
2038 }
2039 #endif
2040
2041 }
2042
2043 int main(int argc, char *argv[]) {
2044 #ifndef LDID_NOSMIME
2045     OpenSSL_add_all_algorithms();
2046 #endif
2047
2048     union {
2049         uint16_t word;
2050         uint8_t byte[2];
2051     } endian = {1};
2052
2053     little_ = endian.byte[0];
2054
2055     bool flag_r(false);
2056     bool flag_e(false);
2057
2058 #ifndef LDID_NOFLAGT
2059     bool flag_T(false);
2060 #endif
2061
2062     bool flag_S(false);
2063     bool flag_s(false);
2064
2065     bool flag_D(false);
2066
2067     bool flag_A(false);
2068     bool flag_a(false);
2069
2070     bool flag_u(false);
2071
2072     uint32_t flag_CPUType(_not(uint32_t));
2073     uint32_t flag_CPUSubtype(_not(uint32_t));
2074
2075     const char *flag_I(NULL);
2076
2077 #ifndef LDID_NOFLAGT
2078     bool timeh(false);
2079     uint32_t timev(0);
2080 #endif
2081
2082     Map entitlements;
2083     Map key;
2084     ldid::Slots slots;
2085
2086     std::vector<std::string> files;
2087
2088     if (argc == 1) {
2089         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2090         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2091         fprintf(stderr, "   %s -S cat\n", argv[0]);
2092         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2093         exit(0);
2094     }
2095
2096     for (int argi(1); argi != argc; ++argi)
2097         if (argv[argi][0] != '-')
2098             files.push_back(argv[argi]);
2099         else switch (argv[argi][1]) {
2100             case 'r':
2101                 _assert(!flag_s);
2102                 _assert(!flag_S);
2103                 flag_r = true;
2104             break;
2105
2106             case 'e': flag_e = true; break;
2107
2108             case 'E': {
2109                 const char *slot = argv[argi] + 2;
2110                 const char *colon = strchr(slot, ':');
2111                 _assert(colon != NULL);
2112                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2113                 char *arge;
2114                 unsigned number(strtoul(slot, &arge, 0));
2115                 _assert(arge == colon);
2116                 std::vector<char> &hash(slots[number]);
2117                 hash.resize(LDID_SHA1_DIGEST_LENGTH);
2118                 sha1(reinterpret_cast<uint8_t *>(hash.data()), file.data(), file.size());
2119             } break;
2120
2121             case 'D': flag_D = true; break;
2122
2123             case 'a': flag_a = true; break;
2124
2125             case 'A':
2126                 _assert(!flag_A);
2127                 flag_A = true;
2128                 if (argv[argi][2] != '\0') {
2129                     const char *cpu = argv[argi] + 2;
2130                     const char *colon = strchr(cpu, ':');
2131                     _assert(colon != NULL);
2132                     char *arge;
2133                     flag_CPUType = strtoul(cpu, &arge, 0);
2134                     _assert(arge == colon);
2135                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2136                     _assert(arge == argv[argi] + strlen(argv[argi]));
2137                 }
2138             break;
2139
2140             case 's':
2141                 _assert(!flag_r);
2142                 _assert(!flag_S);
2143                 flag_s = true;
2144             break;
2145
2146             case 'S':
2147                 _assert(!flag_r);
2148                 _assert(!flag_s);
2149                 flag_S = true;
2150                 if (argv[argi][2] != '\0') {
2151                     const char *xml = argv[argi] + 2;
2152                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2153                 }
2154             break;
2155
2156             case 'K':
2157                 key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2158             break;
2159
2160 #ifndef LDID_NOFLAGT
2161             case 'T': {
2162                 flag_T = true;
2163                 if (argv[argi][2] == '-')
2164                     timeh = true;
2165                 else {
2166                     char *arge;
2167                     timev = strtoul(argv[argi] + 2, &arge, 0);
2168                     _assert(arge == argv[argi] + strlen(argv[argi]));
2169                 }
2170             } break;
2171 #endif
2172
2173             case 'u': {
2174                 flag_u = true;
2175             } break;
2176
2177             case 'I': {
2178                 flag_I = argv[argi] + 2;
2179             } break;
2180
2181             default:
2182                 goto usage;
2183             break;
2184         }
2185
2186     _assert(flag_S || key.empty());
2187     _assert(flag_S || flag_I == NULL);
2188
2189     if (files.empty()) usage: {
2190         exit(0);
2191     }
2192
2193     size_t filei(0), filee(0);
2194     _foreach (file, files) try {
2195         std::string path(file);
2196
2197         struct stat info;
2198         _syscall(stat(path.c_str(), &info));
2199
2200         if (S_ISDIR(info.st_mode)) {
2201 #ifndef LDID_NOPLIST
2202             _assert(!flag_r);
2203             ldid::DiskFolder folder(path);
2204             std::map<std::string, std::vector<char>> hashes;
2205             path += "/" + Bundle("", folder, key, hashes, entitlements);
2206 #else
2207             _assert(false);
2208 #endif
2209         } else if (flag_S || flag_r) {
2210             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2211
2212             std::filebuf output;
2213             Split split(path);
2214             auto temp(Temporary(output, split));
2215
2216             if (flag_r)
2217                 ldid::Unsign(input.data(), input.size(), output);
2218             else {
2219                 std::string identifier(flag_I ?: split.base.c_str());
2220                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, key, slots);
2221             }
2222
2223             Commit(path, temp);
2224         }
2225
2226         bool modify(false);
2227 #ifndef LDID_NOFLAGT
2228         if (flag_T)
2229             modify = true;
2230 #endif
2231         if (flag_s)
2232             modify = true;
2233
2234         Map mapping(path, modify);
2235         FatHeader fat_header(mapping.data(), mapping.size());
2236
2237         _foreach (mach_header, fat_header.GetMachHeaders()) {
2238             struct linkedit_data_command *signature(NULL);
2239             struct encryption_info_command *encryption(NULL);
2240
2241             if (flag_A) {
2242                 if (mach_header.GetCPUType() != flag_CPUType)
2243                     continue;
2244                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2245                     continue;
2246             }
2247
2248             if (flag_a)
2249                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2250
2251             _foreach (load_command, mach_header.GetLoadCommands()) {
2252                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2253
2254                 if (false);
2255                 else if (cmd == LC_CODE_SIGNATURE)
2256                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2257                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2258                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2259                 else if (cmd == LC_LOAD_DYLIB) {
2260                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2261                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2262
2263                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2264                         if (flag_u) {
2265                             Version version;
2266                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2267                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2268                         }
2269                     }
2270                 }
2271 #ifndef LDID_NOFLAGT
2272                 else if (cmd == LC_ID_DYLIB) {
2273                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2274
2275                     if (flag_T) {
2276                         uint32_t timed;
2277
2278                         if (!timeh)
2279                             timed = timev;
2280                         else {
2281                             dylib_command->dylib.timestamp = 0;
2282                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2283                         }
2284
2285                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2286                     }
2287                 }
2288 #endif
2289             }
2290
2291             if (flag_D) {
2292                 _assert(encryption != NULL);
2293                 encryption->cryptid = mach_header.Swap(0);
2294             }
2295
2296             if (flag_e) {
2297                 _assert(signature != NULL);
2298
2299                 uint32_t data = mach_header.Swap(signature->dataoff);
2300
2301                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2302                 uint8_t *blob = top + data;
2303                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2304
2305                 for (size_t index(0); index != Swap(super->count); ++index)
2306                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2307                         uint32_t begin = Swap(super->index[index].offset);
2308                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2309                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2310                     }
2311             }
2312
2313             if (flag_s) {
2314                 _assert(signature != NULL);
2315
2316                 uint32_t data = mach_header.Swap(signature->dataoff);
2317
2318                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2319                 uint8_t *blob = top + data;
2320                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2321
2322                 for (size_t index(0); index != Swap(super->count); ++index)
2323                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2324                         uint32_t begin = Swap(super->index[index].offset);
2325                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
2326
2327                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2328                         uint32_t pages = Swap(directory->nCodeSlots);
2329
2330                         if (pages != 1)
2331                             for (size_t i = 0; i != pages - 1; ++i)
2332                                 sha1(hashes[i], top + PageSize_ * i, PageSize_);
2333                         if (pages != 0)
2334                             sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1);
2335                     }
2336             }
2337         }
2338
2339         ++filei;
2340     } catch (const char *) {
2341         ++filee;
2342         ++filei;
2343     }
2344
2345     return filee;
2346 }