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
  55 #define LDID_SHA1_DIGEST_LENGTH CC_SHA1_DIGEST_LENGTH
  56 #define LDID_SHA1 CC_SHA1
  57 #define LDID_SHA1_CTX CC_SHA1_CTX
  58 #define LDID_SHA1_Init CC_SHA1_Init
  59 #define LDID_SHA1_Update CC_SHA1_Update
  60 #define LDID_SHA1_Final CC_SHA1_Final
  61
  62 #define LDID_SHA256_DIGEST_LENGTH CC_SHA256_DIGEST_LENGTH
  63 #define LDID_SHA256 CC_SHA256
  64 #define LDID_SHA256_CTX CC_SHA256_CTX
  65 #define LDID_SHA256_Init CC_SHA256_Init
  66 #define LDID_SHA256_Update CC_SHA256_Update
  67 #define LDID_SHA256_Final CC_SHA256_Final
  68 #else
  69 #include <openssl/sha.h>
  70
  71 #define LDID_SHA1_DIGEST_LENGTH SHA_DIGEST_LENGTH
  72 #define LDID_SHA1 SHA1
  73 #define LDID_SHA1_CTX SHA_CTX
  74 #define LDID_SHA1_Init SHA1_Init
  75 #define LDID_SHA1_Update SHA1_Update
  76 #define LDID_SHA1_Final SHA1_Final
  77
  78 #define LDID_SHA256_DIGEST_LENGTH SHA256_DIGEST_LENGTH
  79 #define LDID_SHA256 SHA256
  80 #define LDID_SHA256_CTX SHA256_CTX
  81 #define LDID_SHA256_Init SHA256_Init
  82 #define LDID_SHA256_Update SHA256_Update
  83 #define LDID_SHA256_Final SHA256_Final
  84 #endif
  85
  86 #ifndef LDID_NOPLIST
  87 #include <plist/plist.h>
  88 #endif
  89
  90 #include "ldid.hpp"
  91
  92 #define _assert___(line) \
  93     #line
  94 #define _assert__(line) \
  95     _assert___(line)
  96
  97 #ifdef __EXCEPTIONS
  98 #define _assert_(expr, format, ...) \
  99     do if (!(expr)) { \
 100         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
 101         throw __FILE__ "(" _assert__(__LINE__) "): _assert(" #expr ")"; \
 102     } while (false)
 103 #else
 104 // XXX: this is not acceptable
 105 #define _assert_(expr, format, ...) \
 106     do if (!(expr)) { \
 107         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
 108         exit(-1); \
 109     } while (false)
 110 #endif
 111
 112 #define _assert(expr) \
 113     _assert_(expr, "%s", #expr)
 114
 115 #define _syscall(expr, ...) [&] { for (;;) { \
 116     auto _value(expr); \
 117     if ((long) _value != -1) \
 118         return _value; \
 119     int error(errno); \
 120     if (error == EINTR) \
 121         continue; \
 122     /* XXX: EINTR is included in this list to fix g++ */ \
 123     for (auto success : (long[]) {EINTR, __VA_ARGS__}) \
 124         if (error == success) \
 125             return (decltype(expr)) -success; \
 126     _assert_(false, "errno=%u", error); \
 127 } }()
 128
 129 #define _trace() \
 130     fprintf(stderr, "_trace(%s:%u): %s\n", __FILE__, __LINE__, __FUNCTION__)
 131
 132 #define _not(type) \
 133     ((type) ~ (type) 0)
 134
 135 #define _packed \
 136     __attribute__((packed))
 137
 138 template <typename Type_>
 139 struct Iterator_ {
 140     typedef typename Type_::const_iterator Result;
 141 };
 142
 143 #define _foreach(item, list) \
 144     for (bool _stop(true); _stop; ) \
 145         for (const __typeof__(list) &_list = (list); _stop; _stop = false) \
 146             for (Iterator_<__typeof__(list)>::Result _item = _list.begin(); _item != _list.end(); ++_item) \
 147                 for (bool _suck(true); _suck; _suck = false) \
 148                     for (const __typeof__(*_item) &item = *_item; _suck; _suck = false)
 149
 150 class _Scope {
 151 };
 152
 153 template <typename Function_>
 154 class Scope :
 155     public _Scope
 156 {
 157   private:
 158     Function_ function_;
 159
 160   public:
 161     Scope(const Function_ &function) :
 162         function_(function)
 163     {
 164     }
 165
 166     ~Scope() {
 167         function_();
 168     }
 169 };
 170
 171 template <typename Function_>
 172 Scope<Function_> _scope(const Function_ &function) {
 173     return Scope<Function_>(function);
 174 }
 175
 176 #define _scope__(counter, function) \
 177     __attribute__((__unused__)) \
 178     const _Scope &_scope ## counter(_scope([&]function))
 179 #define _scope_(counter, function) \
 180     _scope__(counter, function)
 181 #define _scope(function) \
 182     _scope_(__COUNTER__, function)
 183
 184 #define CPU_ARCH_MASK  uint32_t(0xff000000)
 185 #define CPU_ARCH_ABI64 uint32_t(0x01000000)
 186
 187 #define CPU_TYPE_ANY     uint32_t(-1)
 188 #define CPU_TYPE_VAX     uint32_t( 1)
 189 #define CPU_TYPE_MC680x0 uint32_t( 6)
 190 #define CPU_TYPE_X86     uint32_t( 7)
 191 #define CPU_TYPE_MC98000 uint32_t(10)
 192 #define CPU_TYPE_HPPA    uint32_t(11)
 193 #define CPU_TYPE_ARM     uint32_t(12)
 194 #define CPU_TYPE_MC88000 uint32_t(13)
 195 #define CPU_TYPE_SPARC   uint32_t(14)
 196 #define CPU_TYPE_I860    uint32_t(15)
 197 #define CPU_TYPE_POWERPC uint32_t(18)
 198
 199 #define CPU_TYPE_I386 CPU_TYPE_X86
 200
 201 #define CPU_TYPE_ARM64     (CPU_ARCH_ABI64 | CPU_TYPE_ARM)
 202 #define CPU_TYPE_POWERPC64 (CPU_ARCH_ABI64 | CPU_TYPE_POWERPC)
 203 #define CPU_TYPE_X86_64    (CPU_ARCH_ABI64 | CPU_TYPE_X86)
 204
 205 struct fat_header {
 206     uint32_t magic;
 207     uint32_t nfat_arch;
 208 } _packed;
 209
 210 #define FAT_MAGIC 0xcafebabe
 211 #define FAT_CIGAM 0xbebafeca
 212
 213 struct fat_arch {
 214     uint32_t cputype;
 215     uint32_t cpusubtype;
 216     uint32_t offset;
 217     uint32_t size;
 218     uint32_t align;
 219 } _packed;
 220
 221 struct mach_header {
 222     uint32_t magic;
 223     uint32_t cputype;
 224     uint32_t cpusubtype;
 225     uint32_t filetype;
 226     uint32_t ncmds;
 227     uint32_t sizeofcmds;
 228     uint32_t flags;
 229 } _packed;
 230
 231 #define MH_MAGIC 0xfeedface
 232 #define MH_CIGAM 0xcefaedfe
 233
 234 #define MH_MAGIC_64 0xfeedfacf
 235 #define MH_CIGAM_64 0xcffaedfe
 236
 237 #define MH_DYLDLINK   0x4
 238
 239 #define MH_OBJECT     0x1
 240 #define MH_EXECUTE    0x2
 241 #define MH_DYLIB      0x6
 242 #define MH_BUNDLE     0x8
 243 #define MH_DYLIB_STUB 0x9
 244
 245 struct load_command {
 246     uint32_t cmd;
 247     uint32_t cmdsize;
 248 } _packed;
 249
 250 #define LC_REQ_DYLD           uint32_t(0x80000000)
 251
 252 #define LC_SEGMENT            uint32_t(0x01)
 253 #define LC_SYMTAB             uint32_t(0x02)
 254 #define LC_DYSYMTAB           uint32_t(0x0b)
 255 #define LC_LOAD_DYLIB         uint32_t(0x0c)
 256 #define LC_ID_DYLIB           uint32_t(0x0d)
 257 #define LC_SEGMENT_64         uint32_t(0x19)
 258 #define LC_UUID               uint32_t(0x1b)
 259 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
 260 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
 261 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
 262 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
 263 #define LC_DYLD_INFO          uint32_t(0x22)
 264 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
 265 #define LC_ENCRYPTION_INFO_64 uint32_t(0x2c)
 266
 267 union Version {
 268     struct {
 269         uint8_t patch;
 270         uint8_t minor;
 271         uint16_t major;
 272     } _packed;
 273
 274     uint32_t value;
 275 };
 276
 277 struct dylib {
 278     uint32_t name;
 279     uint32_t timestamp;
 280     uint32_t current_version;
 281     uint32_t compatibility_version;
 282 } _packed;
 283
 284 struct dylib_command {
 285     uint32_t cmd;
 286     uint32_t cmdsize;
 287     struct dylib dylib;
 288 } _packed;
 289
 290 struct uuid_command {
 291     uint32_t cmd;
 292     uint32_t cmdsize;
 293     uint8_t uuid[16];
 294 } _packed;
 295
 296 struct symtab_command {
 297     uint32_t cmd;
 298     uint32_t cmdsize;
 299     uint32_t symoff;
 300     uint32_t nsyms;
 301     uint32_t stroff;
 302     uint32_t strsize;
 303 } _packed;
 304
 305 struct dyld_info_command {
 306     uint32_t cmd;
 307     uint32_t cmdsize;
 308     uint32_t rebase_off;
 309     uint32_t rebase_size;
 310     uint32_t bind_off;
 311     uint32_t bind_size;
 312     uint32_t weak_bind_off;
 313     uint32_t weak_bind_size;
 314     uint32_t lazy_bind_off;
 315     uint32_t lazy_bind_size;
 316     uint32_t export_off;
 317     uint32_t export_size;
 318 } _packed;
 319
 320 struct dysymtab_command {
 321     uint32_t cmd;
 322     uint32_t cmdsize;
 323     uint32_t ilocalsym;
 324     uint32_t nlocalsym;
 325     uint32_t iextdefsym;
 326     uint32_t nextdefsym;
 327     uint32_t iundefsym;
 328     uint32_t nundefsym;
 329     uint32_t tocoff;
 330     uint32_t ntoc;
 331     uint32_t modtaboff;
 332     uint32_t nmodtab;
 333     uint32_t extrefsymoff;
 334     uint32_t nextrefsyms;
 335     uint32_t indirectsymoff;
 336     uint32_t nindirectsyms;
 337     uint32_t extreloff;
 338     uint32_t nextrel;
 339     uint32_t locreloff;
 340     uint32_t nlocrel;
 341 } _packed;
 342
 343 struct dylib_table_of_contents {
 344     uint32_t symbol_index;
 345     uint32_t module_index;
 346 } _packed;
 347
 348 struct dylib_module {
 349     uint32_t module_name;
 350     uint32_t iextdefsym;
 351     uint32_t nextdefsym;
 352     uint32_t irefsym;
 353     uint32_t nrefsym;
 354     uint32_t ilocalsym;
 355     uint32_t nlocalsym;
 356     uint32_t iextrel;
 357     uint32_t nextrel;
 358     uint32_t iinit_iterm;
 359     uint32_t ninit_nterm;
 360     uint32_t objc_module_info_addr;
 361     uint32_t objc_module_info_size;
 362 } _packed;
 363
 364 struct dylib_reference {
 365     uint32_t isym:24;
 366     uint32_t flags:8;
 367 } _packed;
 368
 369 struct relocation_info {
 370     int32_t r_address;
 371     uint32_t r_symbolnum:24;
 372     uint32_t r_pcrel:1;
 373     uint32_t r_length:2;
 374     uint32_t r_extern:1;
 375     uint32_t r_type:4;
 376 } _packed;
 377
 378 struct nlist {
 379     union {
 380         char *n_name;
 381         int32_t n_strx;
 382     } n_un;
 383
 384     uint8_t n_type;
 385     uint8_t n_sect;
 386     uint8_t n_desc;
 387     uint32_t n_value;
 388 } _packed;
 389
 390 struct segment_command {
 391     uint32_t cmd;
 392     uint32_t cmdsize;
 393     char segname[16];
 394     uint32_t vmaddr;
 395     uint32_t vmsize;
 396     uint32_t fileoff;
 397     uint32_t filesize;
 398     uint32_t maxprot;
 399     uint32_t initprot;
 400     uint32_t nsects;
 401     uint32_t flags;
 402 } _packed;
 403
 404 struct segment_command_64 {
 405     uint32_t cmd;
 406     uint32_t cmdsize;
 407     char segname[16];
 408     uint64_t vmaddr;
 409     uint64_t vmsize;
 410     uint64_t fileoff;
 411     uint64_t filesize;
 412     uint32_t maxprot;
 413     uint32_t initprot;
 414     uint32_t nsects;
 415     uint32_t flags;
 416 } _packed;
 417
 418 struct section {
 419     char sectname[16];
 420     char segname[16];
 421     uint32_t addr;
 422     uint32_t size;
 423     uint32_t offset;
 424     uint32_t align;
 425     uint32_t reloff;
 426     uint32_t nreloc;
 427     uint32_t flags;
 428     uint32_t reserved1;
 429     uint32_t reserved2;
 430 } _packed;
 431
 432 struct section_64 {
 433     char sectname[16];
 434     char segname[16];
 435     uint64_t addr;
 436     uint64_t size;
 437     uint32_t offset;
 438     uint32_t align;
 439     uint32_t reloff;
 440     uint32_t nreloc;
 441     uint32_t flags;
 442     uint32_t reserved1;
 443     uint32_t reserved2;
 444     uint32_t reserved3;
 445 } _packed;
 446
 447 struct linkedit_data_command {
 448     uint32_t cmd;
 449     uint32_t cmdsize;
 450     uint32_t dataoff;
 451     uint32_t datasize;
 452 } _packed;
 453
 454 struct encryption_info_command {
 455     uint32_t cmd;
 456     uint32_t cmdsize;
 457     uint32_t cryptoff;
 458     uint32_t cryptsize;
 459     uint32_t cryptid;
 460 } _packed;
 461
 462 #define BIND_OPCODE_MASK                             0xf0
 463 #define BIND_IMMEDIATE_MASK                          0x0f
 464 #define BIND_OPCODE_DONE                             0x00
 465 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 466 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 467 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 468 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 469 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 470 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 471 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 472 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 473 #define BIND_OPCODE_DO_BIND                          0x90
 474 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 475 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 476 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 477
 478 static auto dummy([](double) {});
 479
 480 static std::streamsize read(std::streambuf &stream, void *data, size_t size) {
 481     auto writ(stream.sgetn(static_cast<char *>(data), size));
 482     _assert(writ >= 0);
 483     return writ;
 484 }
 485
 486 static inline void get(std::streambuf &stream, void *data, size_t size) {
 487     _assert(read(stream, data, size) == size);
 488 }
 489
 490 static inline void put(std::streambuf &stream, const void *data, size_t size) {
 491     _assert(stream.sputn(static_cast<const char *>(data), size) == size);
 492 }
 493
 494 static inline void put(std::streambuf &stream, const void *data, size_t size, const ldid::Functor<void (double)> &percent) {
 495     percent(0);
 496     for (size_t total(0); total != size;) {
 497         auto writ(std::min(size - total, size_t(4096 * 4)));
 498         _assert(stream.sputn(static_cast<const char *>(data) + total, writ) == writ);
 499         total += writ;
 500         percent(double(total) / size);
 501     }
 502 }
 503
 504 static size_t most(std::streambuf &stream, void *data, size_t size) {
 505     size_t total(size);
 506     while (size > 0)
 507         if (auto writ = read(stream, data, size))
 508             size -= writ;
 509         else break;
 510     return total - size;
 511 }
 512
 513 static inline void pad(std::streambuf &stream, size_t size) {
 514     char padding[size];
 515     memset(padding, 0, size);
 516     put(stream, padding, size);
 517 }
 518
 519 template <typename Type_>
 520 Type_ Align(Type_ value, size_t align) {
 521     value += align - 1;
 522     value /= align;
 523     value *= align;
 524     return value;
 525 }
 526
 527 static const uint8_t PageShift_(0x0c);
 528 static const uint32_t PageSize_(1 << PageShift_);
 529
 530 static inline uint16_t Swap_(uint16_t value) {
 531     return
 532         ((value >>  8) & 0x00ff) |
 533         ((value <<  8) & 0xff00);
 534 }
 535
 536 static inline uint32_t Swap_(uint32_t value) {
 537     value = ((value >>  8) & 0x00ff00ff) |
 538             ((value <<  8) & 0xff00ff00);
 539     value = ((value >> 16) & 0x0000ffff) |
 540             ((value << 16) & 0xffff0000);
 541     return value;
 542 }
 543
 544 static inline uint64_t Swap_(uint64_t value) {
 545     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 546     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 547     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 548     return value;
 549 }
 550
 551 static inline int16_t Swap_(int16_t value) {
 552     return Swap_(static_cast<uint16_t>(value));
 553 }
 554
 555 static inline int32_t Swap_(int32_t value) {
 556     return Swap_(static_cast<uint32_t>(value));
 557 }
 558
 559 static inline int64_t Swap_(int64_t value) {
 560     return Swap_(static_cast<uint64_t>(value));
 561 }
 562
 563 static bool little_(true);
 564
 565 static inline uint16_t Swap(uint16_t value) {
 566     return little_ ? Swap_(value) : value;
 567 }
 568
 569 static inline uint32_t Swap(uint32_t value) {
 570     return little_ ? Swap_(value) : value;
 571 }
 572
 573 static inline uint64_t Swap(uint64_t value) {
 574     return little_ ? Swap_(value) : value;
 575 }
 576
 577 static inline int16_t Swap(int16_t value) {
 578     return Swap(static_cast<uint16_t>(value));
 579 }
 580
 581 static inline int32_t Swap(int32_t value) {
 582     return Swap(static_cast<uint32_t>(value));
 583 }
 584
 585 static inline int64_t Swap(int64_t value) {
 586     return Swap(static_cast<uint64_t>(value));
 587 }
 588
 589 class Swapped {
 590   protected:
 591     bool swapped_;
 592
 593     Swapped() :
 594         swapped_(false)
 595     {
 596     }
 597
 598   public:
 599     Swapped(bool swapped) :
 600         swapped_(swapped)
 601     {
 602     }
 603
 604     template <typename Type_>
 605     Type_ Swap(Type_ value) const {
 606         return swapped_ ? Swap_(value) : value;
 607     }
 608 };
 609
 610 class Data :
 611     public Swapped
 612 {
 613   private:
 614     void *base_;
 615     size_t size_;
 616
 617   public:
 618     Data(void *base, size_t size) :
 619         base_(base),
 620         size_(size)
 621     {
 622     }
 623
 624     void *GetBase() const {
 625         return base_;
 626     }
 627
 628     size_t GetSize() const {
 629         return size_;
 630     }
 631 };
 632
 633 class MachHeader :
 634     public Data
 635 {
 636   private:
 637     bool bits64_;
 638
 639     struct mach_header *mach_header_;
 640     struct load_command *load_command_;
 641
 642   public:
 643     MachHeader(void *base, size_t size) :
 644         Data(base, size)
 645     {
 646         mach_header_ = (mach_header *) base;
 647
 648         switch (Swap(mach_header_->magic)) {
 649             case MH_CIGAM:
 650                 swapped_ = !swapped_;
 651             case MH_MAGIC:
 652                 bits64_ = false;
 653             break;
 654
 655             case MH_CIGAM_64:
 656                 swapped_ = !swapped_;
 657             case MH_MAGIC_64:
 658                 bits64_ = true;
 659             break;
 660
 661             default:
 662                 _assert(false);
 663         }
 664
 665         void *post = mach_header_ + 1;
 666         if (bits64_)
 667             post = (uint32_t *) post + 1;
 668         load_command_ = (struct load_command *) post;
 669
 670         _assert(
 671             Swap(mach_header_->filetype) == MH_EXECUTE ||
 672             Swap(mach_header_->filetype) == MH_DYLIB ||
 673             Swap(mach_header_->filetype) == MH_BUNDLE
 674         );
 675     }
 676
 677     bool Bits64() const {
 678         return bits64_;
 679     }
 680
 681     struct mach_header *operator ->() const {
 682         return mach_header_;
 683     }
 684
 685     operator struct mach_header *() const {
 686         return mach_header_;
 687     }
 688
 689     uint32_t GetCPUType() const {
 690         return Swap(mach_header_->cputype);
 691     }
 692
 693     uint32_t GetCPUSubtype() const {
 694         return Swap(mach_header_->cpusubtype) & 0xff;
 695     }
 696
 697     struct load_command *GetLoadCommand() const {
 698         return load_command_;
 699     }
 700
 701     std::vector<struct load_command *> GetLoadCommands() const {
 702         std::vector<struct load_command *> load_commands;
 703
 704         struct load_command *load_command = load_command_;
 705         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 706             load_commands.push_back(load_command);
 707             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 708         }
 709
 710         return load_commands;
 711     }
 712
 713     void ForSection(const ldid::Functor<void (const char *, const char *, void *, size_t)> &code) const {
 714         _foreach (load_command, GetLoadCommands())
 715             switch (Swap(load_command->cmd)) {
 716                 case LC_SEGMENT: {
 717                     auto segment(reinterpret_cast<struct segment_command *>(load_command));
 718                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 719                     auto section(reinterpret_cast<struct section *>(segment + 1));
 720                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 721                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 722                 } break;
 723
 724                 case LC_SEGMENT_64: {
 725                     auto segment(reinterpret_cast<struct segment_command_64 *>(load_command));
 726                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 727                     auto section(reinterpret_cast<struct section_64 *>(segment + 1));
 728                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 729                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 730                 } break;
 731             }
 732     }
 733
 734     template <typename Target_>
 735     Target_ *GetOffset(uint32_t offset) const {
 736         return reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_);
 737     }
 738 };
 739
 740 class FatMachHeader :
 741     public MachHeader
 742 {
 743   private:
 744     fat_arch *fat_arch_;
 745
 746   public:
 747     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 748         MachHeader(base, size),
 749         fat_arch_(fat_arch)
 750     {
 751     }
 752
 753     fat_arch *GetFatArch() const {
 754         return fat_arch_;
 755     }
 756 };
 757
 758 class FatHeader :
 759     public Data
 760 {
 761   private:
 762     fat_header *fat_header_;
 763     std::vector<FatMachHeader> mach_headers_;
 764
 765   public:
 766     FatHeader(void *base, size_t size) :
 767         Data(base, size)
 768     {
 769         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 770
 771         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 772             swapped_ = !swapped_;
 773             goto fat;
 774         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 775             fat_header_ = NULL;
 776             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 777         } else fat: {
 778             size_t fat_narch = Swap(fat_header_->nfat_arch);
 779             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 780             size_t arch;
 781             for (arch = 0; arch != fat_narch; ++arch) {
 782                 uint32_t arch_offset = Swap(fat_arch->offset);
 783                 uint32_t arch_size = Swap(fat_arch->size);
 784                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 785                 ++fat_arch;
 786             }
 787         }
 788     }
 789
 790     std::vector<FatMachHeader> &GetMachHeaders() {
 791         return mach_headers_;
 792     }
 793
 794     bool IsFat() const {
 795         return fat_header_ != NULL;
 796     }
 797
 798     struct fat_header *operator ->() const {
 799         return fat_header_;
 800     }
 801
 802     operator struct fat_header *() const {
 803         return fat_header_;
 804     }
 805 };
 806
 807 #define CSMAGIC_REQUIREMENT            uint32_t(0xfade0c00)
 808 #define CSMAGIC_REQUIREMENTS           uint32_t(0xfade0c01)
 809 #define CSMAGIC_CODEDIRECTORY          uint32_t(0xfade0c02)
 810 #define CSMAGIC_EMBEDDED_SIGNATURE     uint32_t(0xfade0cc0)
 811 #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02)
 812 #define CSMAGIC_EMBEDDED_ENTITLEMENTS  uint32_t(0xfade7171)
 813 #define CSMAGIC_DETACHED_SIGNATURE     uint32_t(0xfade0cc1)
 814 #define CSMAGIC_BLOBWRAPPER            uint32_t(0xfade0b01)
 815
 816 #define CSSLOT_CODEDIRECTORY uint32_t(0x00000)
 817 #define CSSLOT_INFOSLOT      uint32_t(0x00001)
 818 #define CSSLOT_REQUIREMENTS  uint32_t(0x00002)
 819 #define CSSLOT_RESOURCEDIR   uint32_t(0x00003)
 820 #define CSSLOT_APPLICATION   uint32_t(0x00004)
 821 #define CSSLOT_ENTITLEMENTS  uint32_t(0x00005)
 822
 823 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 824
 825 #define CS_HASHTYPE_SHA1 1
 826
 827 struct BlobIndex {
 828     uint32_t type;
 829     uint32_t offset;
 830 } _packed;
 831
 832 struct Blob {
 833     uint32_t magic;
 834     uint32_t length;
 835 } _packed;
 836
 837 struct SuperBlob {
 838     struct Blob blob;
 839     uint32_t count;
 840     struct BlobIndex index[];
 841 } _packed;
 842
 843 struct CodeDirectory {
 844     uint32_t version;
 845     uint32_t flags;
 846     uint32_t hashOffset;
 847     uint32_t identOffset;
 848     uint32_t nSpecialSlots;
 849     uint32_t nCodeSlots;
 850     uint32_t codeLimit;
 851     uint8_t hashSize;
 852     uint8_t hashType;
 853     uint8_t spare1;
 854     uint8_t pageSize;
 855     uint32_t spare2;
 856     uint32_t scatterOffset;
 857     uint32_t teamIDOffset;
 858     uint32_t spare3;
 859     uint64_t codeLimit64;
 860 } _packed;
 861
 862 #ifndef LDID_NOFLAGT
 863 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 864 #endif
 865
 866 static void sha1(uint8_t *hash, const void *data, size_t size) {
 867     LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 868 }
 869
 870 static void sha1(std::vector<char> &hash, const void *data, size_t size) {
 871     hash.resize(LDID_SHA1_DIGEST_LENGTH);
 872     sha1(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 873 }
 874
 875 struct CodesignAllocation {
 876     FatMachHeader mach_header_;
 877     uint32_t offset_;
 878     uint32_t size_;
 879     uint32_t limit_;
 880     uint32_t alloc_;
 881     uint32_t align_;
 882
 883     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
 884         mach_header_(mach_header),
 885         offset_(offset),
 886         size_(size),
 887         limit_(limit),
 888         alloc_(alloc),
 889         align_(align)
 890     {
 891     }
 892 };
 893
 894 #ifndef LDID_NOTOOLS
 895 class File {
 896   private:
 897     int file_;
 898
 899   public:
 900     File() :
 901         file_(-1)
 902     {
 903     }
 904
 905     ~File() {
 906         if (file_ != -1)
 907             _syscall(close(file_));
 908     }
 909
 910     void open(const char *path, int flags) {
 911         _assert(file_ == -1);
 912         file_ = _syscall(::open(path, flags));
 913     }
 914
 915     int file() const {
 916         return file_;
 917     }
 918 };
 919
 920 class Map {
 921   private:
 922     File file_;
 923     void *data_;
 924     size_t size_;
 925
 926     void clear() {
 927         if (data_ == NULL)
 928             return;
 929         _syscall(munmap(data_, size_));
 930         data_ = NULL;
 931         size_ = 0;
 932     }
 933
 934   public:
 935     Map() :
 936         data_(NULL),
 937         size_(0)
 938     {
 939     }
 940
 941     Map(const std::string &path, int oflag, int pflag, int mflag) :
 942         Map()
 943     {
 944         open(path, oflag, pflag, mflag);
 945     }
 946
 947     Map(const std::string &path, bool edit) :
 948         Map()
 949     {
 950         open(path, edit);
 951     }
 952
 953     ~Map() {
 954         clear();
 955     }
 956
 957     bool empty() const {
 958         return data_ == NULL;
 959     }
 960
 961     void open(const std::string &path, int oflag, int pflag, int mflag) {
 962         clear();
 963
 964         file_.open(path.c_str(), oflag);
 965         int file(file_.file());
 966
 967         struct stat stat;
 968         _syscall(fstat(file, &stat));
 969         size_ = stat.st_size;
 970
 971         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
 972     }
 973
 974     void open(const std::string &path, bool edit) {
 975         if (edit)
 976             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
 977         else
 978             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
 979     }
 980
 981     void *data() const {
 982         return data_;
 983     }
 984
 985     size_t size() const {
 986         return size_;
 987     }
 988
 989     operator std::string() const {
 990         return std::string(static_cast<char *>(data_), size_);
 991     }
 992 };
 993 #endif
 994
 995 namespace ldid {
 996
 997 std::string Analyze(const void *data, size_t size) {
 998     std::string entitlements;
 999
1000     FatHeader fat_header(const_cast<void *>(data), size);
1001     _foreach (mach_header, fat_header.GetMachHeaders())
1002         _foreach (load_command, mach_header.GetLoadCommands())
1003             if (mach_header.Swap(load_command->cmd) == LC_CODE_SIGNATURE) {
1004                 auto signature(reinterpret_cast<struct linkedit_data_command *>(load_command));
1005                 auto offset(mach_header.Swap(signature->dataoff));
1006                 auto pointer(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + offset);
1007                 auto super(reinterpret_cast<struct SuperBlob *>(pointer));
1008
1009                 for (size_t index(0); index != Swap(super->count); ++index)
1010                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
1011                         auto begin(Swap(super->index[index].offset));
1012                         auto blob(reinterpret_cast<struct Blob *>(pointer + begin));
1013                         auto writ(Swap(blob->length) - sizeof(*blob));
1014
1015                         if (entitlements.empty())
1016                             entitlements.assign(reinterpret_cast<char *>(blob + 1), writ);
1017                         else
1018                             _assert(entitlements.compare(0, entitlements.size(), reinterpret_cast<char *>(blob + 1), writ) == 0);
1019                     }
1020             }
1021
1022     return entitlements;
1023 }
1024
1025 static void Allocate(const void *idata, size_t isize, std::streambuf &output, const Functor<size_t (const MachHeader &, size_t)> &allocate, const Functor<size_t (const MachHeader &, std::streambuf &output, size_t, const std::string &, const char *, const Functor<void (double)> &)> &save, const Functor<void (double)> &percent) {
1026     FatHeader source(const_cast<void *>(idata), isize);
1027
1028     size_t offset(0);
1029     if (source.IsFat())
1030         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
1031
1032     std::vector<CodesignAllocation> allocations;
1033     _foreach (mach_header, source.GetMachHeaders()) {
1034         struct linkedit_data_command *signature(NULL);
1035         struct symtab_command *symtab(NULL);
1036
1037         _foreach (load_command, mach_header.GetLoadCommands()) {
1038             uint32_t cmd(mach_header.Swap(load_command->cmd));
1039             if (false);
1040             else if (cmd == LC_CODE_SIGNATURE)
1041                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1042             else if (cmd == LC_SYMTAB)
1043                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
1044         }
1045
1046         size_t size;
1047         if (signature == NULL)
1048             size = mach_header.GetSize();
1049         else {
1050             size = mach_header.Swap(signature->dataoff);
1051             _assert(size <= mach_header.GetSize());
1052         }
1053
1054         if (symtab != NULL) {
1055             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
1056             _assert(end <= size);
1057             _assert(end >= size - 0x10);
1058             size = end;
1059         }
1060
1061         size_t alloc(allocate(mach_header, size));
1062
1063         auto *fat_arch(mach_header.GetFatArch());
1064         uint32_t align;
1065
1066         if (fat_arch != NULL)
1067             align = source.Swap(fat_arch->align);
1068         else switch (mach_header.GetCPUType()) {
1069             case CPU_TYPE_POWERPC:
1070             case CPU_TYPE_POWERPC64:
1071             case CPU_TYPE_X86:
1072             case CPU_TYPE_X86_64:
1073                 align = 0xc;
1074                 break;
1075             case CPU_TYPE_ARM:
1076             case CPU_TYPE_ARM64:
1077                 align = 0xe;
1078                 break;
1079             default:
1080                 align = 0x0;
1081                 break;
1082         }
1083
1084         offset = Align(offset, 1 << align);
1085
1086         uint32_t limit(size);
1087         if (alloc != 0)
1088             limit = Align(limit, 0x10);
1089
1090         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
1091         offset += size + alloc;
1092         offset = Align(offset, 0x10);
1093     }
1094
1095     size_t position(0);
1096
1097     if (source.IsFat()) {
1098         fat_header fat_header;
1099         fat_header.magic = Swap(FAT_MAGIC);
1100         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1101         put(output, &fat_header, sizeof(fat_header));
1102         position += sizeof(fat_header);
1103
1104         _foreach (allocation, allocations) {
1105             auto &mach_header(allocation.mach_header_);
1106
1107             fat_arch fat_arch;
1108             fat_arch.cputype = Swap(mach_header->cputype);
1109             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1110             fat_arch.offset = Swap(allocation.offset_);
1111             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1112             fat_arch.align = Swap(allocation.align_);
1113             put(output, &fat_arch, sizeof(fat_arch));
1114             position += sizeof(fat_arch);
1115         }
1116     }
1117
1118     _foreach (allocation, allocations) {
1119         auto &mach_header(allocation.mach_header_);
1120
1121         pad(output, allocation.offset_ - position);
1122         position = allocation.offset_;
1123
1124         std::vector<std::string> commands;
1125
1126         _foreach (load_command, mach_header.GetLoadCommands()) {
1127             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1128
1129             switch (mach_header.Swap(load_command->cmd)) {
1130                 case LC_CODE_SIGNATURE:
1131                     continue;
1132                 break;
1133
1134                 case LC_SEGMENT: {
1135                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1136                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1137                         break;
1138                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1139                     segment_command->filesize = size;
1140                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1141                 } break;
1142
1143                 case LC_SEGMENT_64: {
1144                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1145                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1146                         break;
1147                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1148                     segment_command->filesize = size;
1149                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1150                 } break;
1151             }
1152
1153             commands.push_back(copy);
1154         }
1155
1156         if (allocation.alloc_ != 0) {
1157             linkedit_data_command signature;
1158             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1159             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1160             signature.dataoff = mach_header.Swap(allocation.limit_);
1161             signature.datasize = mach_header.Swap(allocation.alloc_);
1162             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1163         }
1164
1165         size_t begin(position);
1166
1167         uint32_t after(0);
1168         _foreach(command, commands)
1169             after += command.size();
1170
1171         std::stringbuf altern;
1172
1173         struct mach_header header(*mach_header);
1174         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1175         header.sizeofcmds = mach_header.Swap(after);
1176         put(output, &header, sizeof(header));
1177         put(altern, &header, sizeof(header));
1178         position += sizeof(header);
1179
1180         if (mach_header.Bits64()) {
1181             auto pad(mach_header.Swap(uint32_t(0)));
1182             put(output, &pad, sizeof(pad));
1183             put(altern, &pad, sizeof(pad));
1184             position += sizeof(pad);
1185         }
1186
1187         _foreach(command, commands) {
1188             put(output, command.data(), command.size());
1189             put(altern, command.data(), command.size());
1190             position += command.size();
1191         }
1192
1193         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1194         if (before > after) {
1195             pad(output, before - after);
1196             pad(altern, before - after);
1197             position += before - after;
1198         }
1199
1200         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1201
1202         std::string overlap(altern.str());
1203         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1204
1205         put(output, top + (position - begin), allocation.size_ - (position - begin), percent);
1206         position = begin + allocation.size_;
1207
1208         pad(output, allocation.limit_ - allocation.size_);
1209         position += allocation.limit_ - allocation.size_;
1210
1211         size_t saved(save(mach_header, output, allocation.limit_, overlap, top, percent));
1212         if (allocation.alloc_ > saved)
1213             pad(output, allocation.alloc_ - saved);
1214         else
1215             _assert(allocation.alloc_ == saved);
1216         position += allocation.alloc_;
1217     }
1218 }
1219
1220 }
1221
1222 typedef std::map<uint32_t, std::string> Blobs;
1223
1224 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1225     auto value(buffer.str());
1226     std::swap(blobs[slot], value);
1227 }
1228
1229 static const std::string &insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1230     auto value(buffer.str());
1231     Blob blob;
1232     blob.magic = Swap(magic);
1233     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1234     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1235     auto &save(blobs[slot]);
1236     std::swap(save, value);
1237     return save;
1238 }
1239
1240 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1241     size_t total(0);
1242     _foreach (blob, blobs)
1243         total += blob.second.size();
1244
1245     struct SuperBlob super;
1246     super.blob.magic = Swap(magic);
1247     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1248     super.count = Swap(uint32_t(blobs.size()));
1249     put(output, &super, sizeof(super));
1250
1251     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1252
1253     _foreach (blob, blobs) {
1254         BlobIndex index;
1255         index.type = Swap(blob.first);
1256         index.offset = Swap(uint32_t(offset));
1257         put(output, &index, sizeof(index));
1258         offset += blob.second.size();
1259     }
1260
1261     _foreach (blob, blobs)
1262         put(output, blob.second.data(), blob.second.size());
1263
1264     return offset;
1265 }
1266
1267 #ifndef LDID_NOSMIME
1268 class Buffer {
1269   private:
1270     BIO *bio_;
1271
1272   public:
1273     Buffer(BIO *bio) :
1274         bio_(bio)
1275     {
1276         _assert(bio_ != NULL);
1277     }
1278
1279     Buffer() :
1280         bio_(BIO_new(BIO_s_mem()))
1281     {
1282     }
1283
1284     Buffer(const char *data, size_t size) :
1285         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1286     {
1287     }
1288
1289     Buffer(const std::string &data) :
1290         Buffer(data.data(), data.size())
1291     {
1292     }
1293
1294     Buffer(PKCS7 *pkcs) :
1295         Buffer()
1296     {
1297         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1298     }
1299
1300     ~Buffer() {
1301         BIO_free_all(bio_);
1302     }
1303
1304     operator BIO *() const {
1305         return bio_;
1306     }
1307
1308     explicit operator std::string() const {
1309         char *data;
1310         auto size(BIO_get_mem_data(bio_, &data));
1311         return std::string(data, size);
1312     }
1313 };
1314
1315 class Stuff {
1316   private:
1317     PKCS12 *value_;
1318     EVP_PKEY *key_;
1319     X509 *cert_;
1320     STACK_OF(X509) *ca_;
1321
1322   public:
1323     Stuff(BIO *bio) :
1324         value_(d2i_PKCS12_bio(bio, NULL)),
1325         ca_(NULL)
1326     {
1327         _assert(value_ != NULL);
1328         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1329         _assert(key_ != NULL);
1330         _assert(cert_ != NULL);
1331     }
1332
1333     Stuff(const std::string &data) :
1334         Stuff(Buffer(data))
1335     {
1336     }
1337
1338     ~Stuff() {
1339         sk_X509_pop_free(ca_, X509_free);
1340         X509_free(cert_);
1341         EVP_PKEY_free(key_);
1342         PKCS12_free(value_);
1343     }
1344
1345     operator PKCS12 *() const {
1346         return value_;
1347     }
1348
1349     operator EVP_PKEY *() const {
1350         return key_;
1351     }
1352
1353     operator X509 *() const {
1354         return cert_;
1355     }
1356
1357     operator STACK_OF(X509) *() const {
1358         return ca_;
1359     }
1360 };
1361
1362 class Signature {
1363   private:
1364     PKCS7 *value_;
1365
1366   public:
1367     Signature(const Stuff &stuff, const Buffer &data) :
1368         value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED))
1369     {
1370         _assert(value_ != NULL);
1371     }
1372
1373     ~Signature() {
1374         PKCS7_free(value_);
1375     }
1376
1377     operator PKCS7 *() const {
1378         return value_;
1379     }
1380 };
1381 #endif
1382
1383 class NullBuffer :
1384     public std::streambuf
1385 {
1386   public:
1387     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1388         return size;
1389     }
1390
1391     virtual int_type overflow(int_type next) {
1392         return next;
1393     }
1394 };
1395
1396 class Digest {
1397   public:
1398     uint8_t sha1_[LDID_SHA1_DIGEST_LENGTH];
1399 };
1400
1401 class Hash {
1402   public:
1403     char sha1_[LDID_SHA1_DIGEST_LENGTH];
1404     char sha256_[LDID_SHA256_DIGEST_LENGTH];
1405
1406     operator std::vector<char>() const {
1407         return {sha1_, sha1_ + sizeof(sha1_)};
1408     }
1409 };
1410
1411 class HashBuffer :
1412     public std::streambuf
1413 {
1414   private:
1415     Hash &hash_;
1416
1417     LDID_SHA1_CTX sha1_;
1418     LDID_SHA256_CTX sha256_;
1419
1420   public:
1421     HashBuffer(Hash &hash) :
1422         hash_(hash)
1423     {
1424         LDID_SHA1_Init(&sha1_);
1425         LDID_SHA256_Init(&sha256_);
1426     }
1427
1428     ~HashBuffer() {
1429         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.sha1_), &sha1_);
1430         LDID_SHA256_Final(reinterpret_cast<uint8_t *>(hash_.sha256_), &sha256_);
1431     }
1432
1433     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1434         LDID_SHA1_Update(&sha1_, data, size);
1435         LDID_SHA256_Update(&sha256_, data, size);
1436         return size;
1437     }
1438
1439     virtual int_type overflow(int_type next) {
1440         if (next == traits_type::eof())
1441             return sync();
1442         char value(next);
1443         xsputn(&value, 1);
1444         return next;
1445     }
1446 };
1447
1448 class HashProxy :
1449     public HashBuffer
1450 {
1451   private:
1452     std::streambuf &buffer_;
1453
1454   public:
1455     HashProxy(Hash &hash, std::streambuf &buffer) :
1456         HashBuffer(hash),
1457         buffer_(buffer)
1458     {
1459     }
1460
1461     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1462         _assert(HashBuffer::xsputn(data, size) == size);
1463         return buffer_.sputn(data, size);
1464     }
1465 };
1466
1467 #ifndef LDID_NOTOOLS
1468 static bool Starts(const std::string &lhs, const std::string &rhs) {
1469     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1470 }
1471
1472 class Split {
1473   public:
1474     std::string dir;
1475     std::string base;
1476
1477     Split(const std::string &path) {
1478         size_t slash(path.rfind('/'));
1479         if (slash == std::string::npos)
1480             base = path;
1481         else {
1482             dir = path.substr(0, slash + 1);
1483             base = path.substr(slash + 1);
1484         }
1485     }
1486 };
1487
1488 static void mkdir_p(const std::string &path) {
1489     if (path.empty())
1490         return;
1491 #ifdef __WIN32__
1492     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1493         return;
1494 #else
1495     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1496         return;
1497 #endif
1498     auto slash(path.rfind('/', path.size() - 1));
1499     if (slash == std::string::npos)
1500         return;
1501     mkdir_p(path.substr(0, slash));
1502 }
1503
1504 static std::string Temporary(std::filebuf &file, const Split &split) {
1505     std::string temp(split.dir + ".ldid." + split.base);
1506     mkdir_p(split.dir);
1507     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1508     return temp;
1509 }
1510
1511 static void Commit(const std::string &path, const std::string &temp) {
1512     struct stat info;
1513     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1514 #ifndef __WIN32__
1515         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1516 #endif
1517         _syscall(chmod(temp.c_str(), info.st_mode));
1518     }
1519
1520     _syscall(rename(temp.c_str(), path.c_str()));
1521 }
1522 #endif
1523
1524 namespace ldid {
1525
1526 std::vector<char> Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &requirement, const std::string &key, const Slots &slots, const Functor<void (double)> &percent) {
1527     std::vector<char> hash(LDID_SHA1_DIGEST_LENGTH);
1528
1529     std::string team;
1530
1531 #ifndef LDID_NOSMIME
1532     if (!key.empty()) {
1533         Stuff stuff(key);
1534         auto name(X509_get_subject_name(stuff));
1535         _assert(name != NULL);
1536         auto index(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, -1));
1537         _assert(index >= 0);
1538         auto next(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, index));
1539         _assert(next == -1);
1540         auto entry(X509_NAME_get_entry(name, index));
1541         _assert(entry != NULL);
1542         auto asn(X509_NAME_ENTRY_get_data(entry));
1543         _assert(asn != NULL);
1544         team.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1545     }
1546 #endif
1547
1548     // XXX: this is just a "sufficiently large number"
1549     size_t certificate(0x3000);
1550
1551     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1552         size_t alloc(sizeof(struct SuperBlob));
1553
1554         uint32_t special(0);
1555
1556         special = std::max(special, CSSLOT_REQUIREMENTS);
1557         alloc += sizeof(struct BlobIndex);
1558         if (requirement.empty())
1559             alloc += 0xc;
1560         else
1561             alloc += requirement.size();
1562
1563         if (!entitlements.empty()) {
1564             special = std::max(special, CSSLOT_ENTITLEMENTS);
1565             alloc += sizeof(struct BlobIndex);
1566             alloc += sizeof(struct Blob);
1567             alloc += entitlements.size();
1568         }
1569
1570         special = std::max(special, CSSLOT_CODEDIRECTORY);
1571         alloc += sizeof(struct BlobIndex);
1572         alloc += sizeof(struct Blob);
1573         alloc += sizeof(struct CodeDirectory);
1574         alloc += identifier.size() + 1;
1575
1576         if (!team.empty())
1577             alloc += team.size() + 1;
1578
1579         if (!key.empty()) {
1580             alloc += sizeof(struct BlobIndex);
1581             alloc += sizeof(struct Blob);
1582             alloc += certificate;
1583         }
1584
1585         _foreach (slot, slots)
1586             special = std::max(special, slot.first);
1587
1588         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1589             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1590                 special = std::max(special, CSSLOT_INFOSLOT);
1591         }));
1592
1593         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1594         alloc = Align(alloc + (special + normal) * LDID_SHA1_DIGEST_LENGTH, 16);
1595         return alloc;
1596     }), fun([&](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top, const Functor<void (double)> &percent) -> size_t {
1597         Blobs blobs;
1598
1599         if (true) {
1600             std::stringbuf data;
1601
1602             if (requirement.empty()) {
1603                 Blobs requirements;
1604                 put(data, CSMAGIC_REQUIREMENTS, requirements);
1605             } else {
1606                 put(data, requirement.data(), requirement.size());
1607             }
1608
1609             insert(blobs, CSSLOT_REQUIREMENTS, data);
1610         }
1611
1612         if (!entitlements.empty()) {
1613             std::stringbuf data;
1614             put(data, entitlements.data(), entitlements.size());
1615             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1616         }
1617
1618         if (true) {
1619             std::stringbuf data;
1620
1621             Slots posts(slots);
1622
1623             mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1624                 if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1625                     sha1(posts[CSSLOT_INFOSLOT], data, size);
1626             }));
1627
1628             uint32_t special(0);
1629             _foreach (blob, blobs)
1630                 special = std::max(special, blob.first);
1631             _foreach (slot, posts)
1632                 special = std::max(special, slot.first);
1633             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1634
1635             CodeDirectory directory;
1636             directory.version = Swap(uint32_t(0x00020200));
1637             directory.flags = Swap(uint32_t(0));
1638             directory.nSpecialSlots = Swap(special);
1639             directory.codeLimit = Swap(uint32_t(limit));
1640             directory.nCodeSlots = Swap(normal);
1641             directory.hashSize = LDID_SHA1_DIGEST_LENGTH;
1642             directory.hashType = CS_HASHTYPE_SHA1;
1643             directory.spare1 = 0x00;
1644             directory.pageSize = PageShift_;
1645             directory.spare2 = Swap(uint32_t(0));
1646             directory.scatterOffset = Swap(uint32_t(0));
1647             directory.spare3 = Swap(uint32_t(0));
1648             directory.codeLimit64 = Swap(uint64_t(0));
1649
1650             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1651
1652             directory.identOffset = Swap(uint32_t(offset));
1653             offset += identifier.size() + 1;
1654
1655             if (team.empty())
1656                 directory.teamIDOffset = Swap(uint32_t(0));
1657             else {
1658                 directory.teamIDOffset = Swap(uint32_t(offset));
1659                 offset += team.size() + 1;
1660             }
1661
1662             offset += LDID_SHA1_DIGEST_LENGTH * special;
1663             directory.hashOffset = Swap(uint32_t(offset));
1664             offset += LDID_SHA1_DIGEST_LENGTH * normal;
1665
1666             put(data, &directory, sizeof(directory));
1667
1668             put(data, identifier.c_str(), identifier.size() + 1);
1669             if (!team.empty())
1670                 put(data, team.c_str(), team.size() + 1);
1671
1672             std::vector<Digest> storage(special + normal);
1673             auto *hashes(&storage[special]);
1674
1675             memset(storage.data(), 0, sizeof(Digest) * special);
1676
1677             _foreach (blob, blobs) {
1678                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1679                 sha1((hashes - blob.first)->sha1_, local, Swap(local->length));
1680             }
1681
1682             _foreach (slot, posts) {
1683                 _assert(sizeof(*hashes) == slot.second.size());
1684                 memcpy(hashes - slot.first, slot.second.data(), slot.second.size());
1685             }
1686
1687             percent(0);
1688             if (normal != 1)
1689                 for (size_t i = 0; i != normal - 1; ++i) {
1690                     sha1(hashes[i].sha1_, (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1691                     percent(double(i) / normal);
1692                 }
1693             if (normal != 0)
1694                 sha1(hashes[normal - 1].sha1_, top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1695             percent(1);
1696
1697             put(data, storage.data(), sizeof(Digest) * storage.size());
1698
1699             const auto &save(insert(blobs, CSSLOT_CODEDIRECTORY, CSMAGIC_CODEDIRECTORY, data));
1700             sha1(hash, save.data(), save.size());
1701         }
1702
1703 #ifndef LDID_NOSMIME
1704         if (!key.empty()) {
1705             std::stringbuf data;
1706             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1707
1708             Stuff stuff(key);
1709             Buffer bio(sign);
1710
1711             Signature signature(stuff, sign);
1712             Buffer result(signature);
1713             std::string value(result);
1714             put(data, value.data(), value.size());
1715
1716             const auto &save(insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data));
1717             _assert(save.size() <= certificate);
1718         }
1719 #endif
1720
1721         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1722     }), percent);
1723
1724     return hash;
1725 }
1726
1727 #ifndef LDID_NOTOOLS
1728 static void Unsign(void *idata, size_t isize, std::streambuf &output, const Functor<void (double)> &percent) {
1729     Allocate(idata, isize, output, fun([](const MachHeader &mach_header, size_t size) -> size_t {
1730         return 0;
1731     }), fun([](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top, const Functor<void (double)> &percent) -> size_t {
1732         return 0;
1733     }), percent);
1734 }
1735
1736 std::string DiskFolder::Path(const std::string &path) const {
1737     return path_ + "/" + path;
1738 }
1739
1740 DiskFolder::DiskFolder(const std::string &path) :
1741     path_(path)
1742 {
1743 }
1744
1745 DiskFolder::~DiskFolder() {
1746     if (!std::uncaught_exception())
1747         for (const auto &commit : commit_)
1748             Commit(commit.first, commit.second);
1749 }
1750
1751 #ifndef __WIN32__
1752 std::string readlink(const std::string &path) {
1753     for (size_t size(1024); ; size *= 2) {
1754         std::string data;
1755         data.resize(size);
1756
1757         int writ(_syscall(::readlink(path.c_str(), &data[0], data.size())));
1758         if (size_t(writ) >= size)
1759             continue;
1760
1761         data.resize(writ);
1762         return data;
1763     }
1764 }
1765 #endif
1766
1767 void DiskFolder::Find(const std::string &root, const std::string &base, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
1768     std::string path(Path(root) + base);
1769
1770     DIR *dir(opendir(path.c_str()));
1771     _assert(dir != NULL);
1772     _scope({ _syscall(closedir(dir)); });
1773
1774     while (auto child = readdir(dir)) {
1775         std::string name(child->d_name);
1776         if (name == "." || name == "..")
1777             continue;
1778         if (Starts(name, ".ldid."))
1779             continue;
1780
1781         bool directory;
1782
1783 #ifdef __WIN32__
1784         struct stat info;
1785         _syscall(stat((path + name).c_str(), &info));
1786         if (false);
1787         else if (S_ISDIR(info.st_mode))
1788             directory = true;
1789         else if (S_ISREG(info.st_mode))
1790             directory = false;
1791         else
1792             _assert_(false, "st_mode=%x", info.st_mode);
1793 #else
1794         switch (child->d_type) {
1795             case DT_DIR:
1796                 directory = true;
1797                 break;
1798             case DT_REG:
1799                 directory = false;
1800                 break;
1801             case DT_LNK:
1802                 link(base + name, fun([&]() { return readlink(path + name); }));
1803                 continue;
1804             default:
1805                 _assert_(false, "d_type=%u", child->d_type);
1806         }
1807 #endif
1808
1809         if (directory)
1810             Find(root, base + name + "/", code, link);
1811         else
1812             code(base + name);
1813     }
1814 }
1815
1816 void DiskFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
1817     if (!edit) {
1818         // XXX: use nullbuf
1819         std::stringbuf save;
1820         code(save);
1821     } else {
1822         std::filebuf save;
1823         auto from(Path(path));
1824         commit_[from] = Temporary(save, from);
1825         code(save);
1826     }
1827 }
1828
1829 bool DiskFolder::Look(const std::string &path) const {
1830     return _syscall(access(Path(path).c_str(), R_OK), ENOENT) == 0;
1831 }
1832
1833 void DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
1834     std::filebuf data;
1835     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
1836     _assert_(result == &data, "DiskFolder::Open(%s)", path.c_str());
1837
1838     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
1839     data.pubseekpos(0, std::ios::in);
1840     code(data, length, NULL);
1841 }
1842
1843 void DiskFolder::Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
1844     Find(path, "", code, link);
1845 }
1846 #endif
1847
1848 SubFolder::SubFolder(Folder &parent, const std::string &path) :
1849     parent_(parent),
1850     path_(path)
1851 {
1852 }
1853
1854 void SubFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
1855     return parent_.Save(path_ + path, edit, flag, code);
1856 }
1857
1858 bool SubFolder::Look(const std::string &path) const {
1859     return parent_.Look(path_ + path);
1860 }
1861
1862 void SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
1863     return parent_.Open(path_ + path, code);
1864 }
1865
1866 void SubFolder::Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
1867     return parent_.Find(path_ + path, code, link);
1868 }
1869
1870 std::string UnionFolder::Map(const std::string &path) const {
1871     auto remap(remaps_.find(path));
1872     if (remap == remaps_.end())
1873         return path;
1874     return remap->second;
1875 }
1876
1877 void UnionFolder::Map(const std::string &path, const Functor<void (const std::string &)> &code, const std::string &file, const Functor<void (const Functor<void (std::streambuf &, size_t, const void *)> &)> &save) const {
1878     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
1879         code(file.substr(path.size()));
1880 }
1881
1882 UnionFolder::UnionFolder(Folder &parent) :
1883     parent_(parent)
1884 {
1885 }
1886
1887 void UnionFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
1888     return parent_.Save(Map(path), edit, flag, code);
1889 }
1890
1891 bool UnionFolder::Look(const std::string &path) const {
1892     auto file(resets_.find(path));
1893     if (file != resets_.end())
1894         return true;
1895     return parent_.Look(Map(path));
1896 }
1897
1898 void UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
1899     auto file(resets_.find(path));
1900     if (file == resets_.end())
1901         return parent_.Open(Map(path), code);
1902     auto &entry(file->second);
1903
1904     auto &data(entry.first);
1905     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
1906     data.pubseekpos(0, std::ios::in);
1907     code(data, length, entry.second);
1908 }
1909
1910 void UnionFolder::Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
1911     for (auto &reset : resets_)
1912         Map(path, code, reset.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
1913             auto &entry(reset.second);
1914             auto length(entry.first.pubseekoff(0, std::ios::end, std::ios::in));
1915             entry.first.pubseekpos(0, std::ios::in);
1916             code(entry.first, length, entry.second);
1917         }));
1918
1919     for (auto &remap : remaps_)
1920         Map(path, code, remap.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
1921             parent_.Open(remap.second, fun([&](std::streambuf &data, size_t length, const void *flag) {
1922                 code(data, length, flag);
1923             }));
1924         }));
1925
1926     parent_.Find(path, fun([&](const std::string &name) {
1927         if (deletes_.find(path + name) == deletes_.end())
1928             code(name);
1929     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
1930         if (deletes_.find(path + name) == deletes_.end())
1931             link(name, read);
1932     }));
1933 }
1934
1935 #ifndef LDID_NOTOOLS
1936 static void copy(std::streambuf &source, std::streambuf &target, size_t length, const ldid::Functor<void (double)> &percent) {
1937     percent(0);
1938     size_t total(0);
1939     for (;;) {
1940         char data[4096 * 4];
1941         size_t writ(source.sgetn(data, sizeof(data)));
1942         if (writ == 0)
1943             break;
1944         _assert(target.sputn(data, writ) == writ);
1945         total += writ;
1946         percent(double(total) / length);
1947     }
1948 }
1949
1950 #ifndef LDID_NOPLIST
1951 static plist_t plist(const std::string &data) {
1952     plist_t plist(NULL);
1953     if (Starts(data, "bplist00"))
1954         plist_from_bin(data.data(), data.size(), &plist);
1955     else
1956         plist_from_xml(data.data(), data.size(), &plist);
1957     _assert(plist != NULL);
1958     return plist;
1959 }
1960
1961 static void plist_d(std::streambuf &buffer, size_t length, const Functor<void (plist_t)> &code) {
1962     std::stringbuf data;
1963     copy(buffer, data, length, ldid::fun(dummy));
1964     auto node(plist(data.str()));
1965     _scope({ plist_free(node); });
1966     _assert(plist_get_node_type(node) == PLIST_DICT);
1967     code(node);
1968 }
1969
1970 static std::string plist_s(plist_t node) {
1971     _assert(node != NULL);
1972     _assert(plist_get_node_type(node) == PLIST_STRING);
1973     char *data;
1974     plist_get_string_val(node, &data);
1975     _scope({ free(data); });
1976     return data;
1977 }
1978 #endif
1979
1980 enum Mode {
1981     NoMode,
1982     OptionalMode,
1983     OmitMode,
1984     NestedMode,
1985     TopMode,
1986 };
1987
1988 class Expression {
1989   private:
1990     regex_t regex_;
1991     std::vector<std::string> matches_;
1992
1993   public:
1994     Expression(const std::string &code) {
1995         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED) == 0, "regcomp()");
1996         matches_.resize(regex_.re_nsub + 1);
1997     }
1998
1999     ~Expression() {
2000         regfree(&regex_);
2001     }
2002
2003     bool operator ()(const std::string &data) {
2004         regmatch_t matches[matches_.size()];
2005         auto value(regexec(&regex_, data.c_str(), matches_.size(), matches, 0));
2006         if (value == REG_NOMATCH)
2007             return false;
2008         _assert_(value == 0, "regexec()");
2009         for (size_t i(0); i != matches_.size(); ++i)
2010             matches_[i].assign(data.data() + matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so);
2011         return true;
2012     }
2013
2014     const std::string &operator [](size_t index) const {
2015         return matches_[index];
2016     }
2017 };
2018
2019 struct Rule {
2020     unsigned weight_;
2021     Mode mode_;
2022     std::string code_;
2023
2024     mutable std::auto_ptr<Expression> regex_;
2025
2026     Rule(unsigned weight, Mode mode, const std::string &code) :
2027         weight_(weight),
2028         mode_(mode),
2029         code_(code)
2030     {
2031     }
2032
2033     Rule(const Rule &rhs) :
2034         weight_(rhs.weight_),
2035         mode_(rhs.mode_),
2036         code_(rhs.code_)
2037     {
2038     }
2039
2040     void Compile() const {
2041         regex_.reset(new Expression(code_));
2042     }
2043
2044     bool operator ()(const std::string &data) const {
2045         _assert(regex_.get() != NULL);
2046         return (*regex_)(data);
2047     }
2048
2049     bool operator <(const Rule &rhs) const {
2050         if (weight_ > rhs.weight_)
2051             return true;
2052         if (weight_ < rhs.weight_)
2053             return false;
2054         return mode_ > rhs.mode_;
2055     }
2056 };
2057
2058 struct RuleCode {
2059     bool operator ()(const Rule *lhs, const Rule *rhs) const {
2060         return lhs->code_ < rhs->code_;
2061     }
2062 };
2063
2064 #ifndef LDID_NOPLIST
2065 static std::vector<char> Sign(const uint8_t *prefix, size_t size, std::streambuf &buffer, Hash &hash, std::streambuf &save, const std::string &identifier, const std::string &entitlements, const std::string &requirement, const std::string &key, const Slots &slots, size_t length, const Functor<void (double)> &percent) {
2066     // XXX: this is a miserable fail
2067     std::stringbuf temp;
2068     put(temp, prefix, size);
2069     copy(buffer, temp, length - size, percent);
2070     // XXX: this is a stupid hack
2071     pad(temp, 0x10 - (length & 0xf));
2072     auto data(temp.str());
2073
2074     HashProxy proxy(hash, save);
2075     return Sign(data.data(), data.size(), proxy, identifier, entitlements, requirement, key, slots, percent);
2076 }
2077
2078 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, std::map<std::string, Hash> &remote, const std::string &requirement, const Functor<std::string (const std::string &, const std::string &)> &alter, const Functor<void (const std::string &)> &progress, const Functor<void (double)> &percent) {
2079     std::string executable;
2080     std::string identifier;
2081
2082     bool mac(false);
2083
2084     std::string info("Info.plist");
2085     if (!folder.Look(info) && folder.Look("Resources/" + info)) {
2086         mac = true;
2087         info = "Resources/" + info;
2088     }
2089
2090     folder.Open(info, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2091         plist_d(buffer, length, fun([&](plist_t node) {
2092             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
2093             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
2094         }));
2095     }));
2096
2097     if (!mac && folder.Look("MacOS/" + executable)) {
2098         executable = "MacOS/" + executable;
2099         mac = true;
2100     }
2101
2102     std::string entitlements;
2103     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2104         // XXX: this is a miserable fail
2105         std::stringbuf temp;
2106         copy(buffer, temp, length, percent);
2107         // XXX: this is a stupid hack
2108         pad(temp, 0x10 - (length & 0xf));
2109         auto data(temp.str());
2110         entitlements = alter(root, Analyze(data.data(), data.size()));
2111     }));
2112
2113     static const std::string directory("_CodeSignature/");
2114     static const std::string signature(directory + "CodeResources");
2115
2116     std::map<std::string, std::multiset<Rule>> versions;
2117
2118     auto &rules1(versions[""]);
2119     auto &rules2(versions["2"]);
2120
2121     const std::string resources(mac ? "Resources/" : "");
2122
2123     if (true) {
2124         rules1.insert(Rule{1, NoMode, "^" + resources});
2125         if (!mac) rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2126         rules1.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2127         rules1.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2128         if (!mac) rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2129         rules1.insert(Rule{1, NoMode, "^version.plist$"});
2130     }
2131
2132     if (true) {
2133         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
2134         rules2.insert(Rule{20, NoMode, "^" + resources});
2135         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
2136         if (!mac) rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2137         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
2138         rules2.insert(Rule{1, NoMode, "^.*"});
2139         rules2.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2140         rules2.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2141         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
2142         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
2143         if (!mac) rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2144         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
2145         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
2146         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
2147     }
2148
2149     std::map<std::string, Hash> local;
2150
2151     std::string failure(mac ? "Contents/|Versions/[^/]*/Resources/" : "");
2152     Expression nested("^(Frameworks/[^/]*\\.framework|PlugIns/[^/]*\\.appex(()|/[^/]*.app))/(" + failure + ")Info\\.plist$");
2153     std::map<std::string, Bundle> bundles;
2154
2155     folder.Find("", fun([&](const std::string &name) {
2156         if (!nested(name))
2157             return;
2158         auto bundle(root + Split(name).dir);
2159         bundle.resize(bundle.size() - resources.size());
2160         SubFolder subfolder(folder, bundle);
2161
2162         bundles[nested[1]] = Sign(bundle, subfolder, key, local, "", Starts(name, "PlugIns/") ? alter :
2163             static_cast<const Functor<std::string (const std::string &, const std::string &)> &>(fun([&](const std::string &, const std::string &entitlements) -> std::string { return entitlements; }))
2164         , progress, percent);
2165     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2166     }));
2167
2168     std::set<std::string> excludes;
2169
2170     auto exclude([&](const std::string &name) {
2171         // BundleDiskRep::adjustResources -> builder.addExclusion
2172         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
2173             return true;
2174
2175         for (const auto &bundle : bundles)
2176             if (Starts(name, bundle.first + "/")) {
2177                 excludes.insert(name);
2178                 return true;
2179             }
2180
2181         return false;
2182     });
2183
2184     std::map<std::string, std::string> links;
2185
2186     folder.Find("", fun([&](const std::string &name) {
2187         if (exclude(name))
2188             return;
2189
2190         if (local.find(name) != local.end())
2191             return;
2192         auto &hash(local[name]);
2193
2194         folder.Open(name, fun([&](std::streambuf &data, size_t length, const void *flag) {
2195             progress(root + name);
2196
2197             union {
2198                 struct {
2199                     uint32_t magic;
2200                     uint32_t count;
2201                 };
2202
2203                 uint8_t bytes[8];
2204             } header;
2205
2206             auto size(most(data, &header.bytes, sizeof(header.bytes)));
2207
2208             if (name != "_WatchKitStub/WK" && size == sizeof(header.bytes))
2209                 switch (Swap(header.magic)) {
2210                     case FAT_MAGIC:
2211                         // Java class file format
2212                         if (Swap(header.count) >= 40)
2213                             break;
2214                     case FAT_CIGAM:
2215                     case MH_MAGIC: case MH_MAGIC_64:
2216                     case MH_CIGAM: case MH_CIGAM_64:
2217                         folder.Save(name, true, flag, fun([&](std::streambuf &save) {
2218                             Slots slots;
2219                             Sign(header.bytes, size, data, hash, save, identifier, "", "", key, slots, length, percent);
2220                         }));
2221                         return;
2222                 }
2223
2224             folder.Save(name, false, flag, fun([&](std::streambuf &save) {
2225                 HashProxy proxy(hash, save);
2226                 put(proxy, header.bytes, size);
2227                 copy(data, proxy, length - size, percent);
2228             }));
2229         }));
2230     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2231         if (exclude(name))
2232             return;
2233
2234         links[name] = read();
2235     }));
2236
2237     auto plist(plist_new_dict());
2238     _scope({ plist_free(plist); });
2239
2240     for (const auto &version : versions) {
2241         auto files(plist_new_dict());
2242         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2243
2244         for (const auto &rule : version.second)
2245             rule.Compile();
2246
2247         bool old(&version.second == &rules1);
2248
2249         for (const auto &hash : local)
2250             for (const auto &rule : version.second)
2251                 if (rule(hash.first)) {
2252                     if (!old && mac && excludes.find(hash.first) != excludes.end());
2253                     else if (old && rule.mode_ == NoMode)
2254                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(hash.second.sha1_, sizeof(hash.second.sha1_)));
2255                     else if (rule.mode_ != OmitMode) {
2256                         auto entry(plist_new_dict());
2257                         plist_dict_set_item(entry, "hash", plist_new_data(hash.second.sha1_, sizeof(hash.second.sha1_)));
2258                         if (!old)
2259                             plist_dict_set_item(entry, "hash2", plist_new_data(hash.second.sha256_, sizeof(hash.second.sha256_)));
2260                         if (rule.mode_ == OptionalMode)
2261                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2262                         plist_dict_set_item(files, hash.first.c_str(), entry);
2263                     }
2264
2265                     break;
2266                 }
2267
2268         for (const auto &link : links)
2269             for (const auto &rule : version.second)
2270                 if (rule(link.first)) {
2271                     if (rule.mode_ != OmitMode) {
2272                         auto entry(plist_new_dict());
2273                         plist_dict_set_item(entry, "symlink", plist_new_string(link.second.c_str()));
2274                         if (rule.mode_ == OptionalMode)
2275                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2276                         plist_dict_set_item(files, link.first.c_str(), entry);
2277                     }
2278
2279                     break;
2280                 }
2281
2282         if (!old && mac)
2283             for (const auto &bundle : bundles) {
2284                 auto entry(plist_new_dict());
2285                 plist_dict_set_item(entry, "cdhash", plist_new_data(bundle.second.hash.data(), bundle.second.hash.size()));
2286                 plist_dict_set_item(entry, "requirement", plist_new_string("anchor apple generic"));
2287                 plist_dict_set_item(files, bundle.first.c_str(), entry);
2288             }
2289     }
2290
2291     for (const auto &version : versions) {
2292         auto rules(plist_new_dict());
2293         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2294
2295         std::multiset<const Rule *, RuleCode> ordered;
2296         for (const auto &rule : version.second)
2297             ordered.insert(&rule);
2298
2299         for (const auto &rule : ordered)
2300             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2301                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2302             else {
2303                 auto entry(plist_new_dict());
2304                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2305
2306                 switch (rule->mode_) {
2307                     case NoMode:
2308                         break;
2309                     case OmitMode:
2310                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2311                         break;
2312                     case OptionalMode:
2313                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2314                         break;
2315                     case NestedMode:
2316                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2317                         break;
2318                     case TopMode:
2319                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2320                         break;
2321                 }
2322
2323                 if (rule->weight_ >= 10000)
2324                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2325                 else if (rule->weight_ != 1)
2326                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2327             }
2328     }
2329
2330     folder.Save(signature, true, NULL, fun([&](std::streambuf &save) {
2331         HashProxy proxy(local[signature], save);
2332         char *xml(NULL);
2333         uint32_t size;
2334         plist_to_xml(plist, &xml, &size);
2335         _scope({ free(xml); });
2336         put(proxy, xml, size);
2337     }));
2338
2339     Bundle bundle;
2340     bundle.path = executable;
2341
2342     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2343         progress(root + executable);
2344         folder.Save(executable, true, flag, fun([&](std::streambuf &save) {
2345             Slots slots;
2346             slots[1] = local.at(info);
2347             slots[3] = local.at(signature);
2348             bundle.hash = Sign(NULL, 0, buffer, local[executable], save, identifier, entitlements, requirement, key, slots, length, percent);
2349         }));
2350     }));
2351
2352     for (const auto &entry : local)
2353         remote[root + entry.first] = entry.second;
2354
2355     return bundle;
2356 }
2357
2358 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, const std::string &requirement, const Functor<std::string (const std::string &, const std::string &)> &alter, const Functor<void (const std::string &)> &progress, const Functor<void (double)> &percent) {
2359     std::map<std::string, Hash> local;
2360     return Sign(root, folder, key, local, requirement, alter, progress, percent);
2361 }
2362 #endif
2363
2364 #endif
2365 }
2366
2367 #ifndef LDID_NOTOOLS
2368 int main(int argc, char *argv[]) {
2369 #ifndef LDID_NOSMIME
2370     OpenSSL_add_all_algorithms();
2371 #endif
2372
2373     union {
2374         uint16_t word;
2375         uint8_t byte[2];
2376     } endian = {1};
2377
2378     little_ = endian.byte[0];
2379
2380     bool flag_r(false);
2381     bool flag_e(false);
2382     bool flag_q(false);
2383
2384 #ifndef LDID_NOFLAGT
2385     bool flag_T(false);
2386 #endif
2387
2388     bool flag_S(false);
2389     bool flag_s(false);
2390
2391     bool flag_D(false);
2392
2393     bool flag_A(false);
2394     bool flag_a(false);
2395
2396     bool flag_u(false);
2397
2398     uint32_t flag_CPUType(_not(uint32_t));
2399     uint32_t flag_CPUSubtype(_not(uint32_t));
2400
2401     const char *flag_I(NULL);
2402
2403 #ifndef LDID_NOFLAGT
2404     bool timeh(false);
2405     uint32_t timev(0);
2406 #endif
2407
2408     Map entitlements;
2409     Map requirement;
2410     Map key;
2411     ldid::Slots slots;
2412
2413     std::vector<std::string> files;
2414
2415     if (argc == 1) {
2416         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2417         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2418         fprintf(stderr, "   %s -S cat\n", argv[0]);
2419         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2420         exit(0);
2421     }
2422
2423     for (int argi(1); argi != argc; ++argi)
2424         if (argv[argi][0] != '-')
2425             files.push_back(argv[argi]);
2426         else switch (argv[argi][1]) {
2427             case 'r':
2428                 _assert(!flag_s);
2429                 _assert(!flag_S);
2430                 flag_r = true;
2431             break;
2432
2433             case 'e': flag_e = true; break;
2434
2435             case 'E': {
2436                 const char *slot = argv[argi] + 2;
2437                 const char *colon = strchr(slot, ':');
2438                 _assert(colon != NULL);
2439                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2440                 char *arge;
2441                 unsigned number(strtoul(slot, &arge, 0));
2442                 _assert(arge == colon);
2443                 sha1(slots[number], file.data(), file.size());
2444             } break;
2445
2446             case 'q': flag_q = true; break;
2447
2448             case 'Q': {
2449                 const char *xml = argv[argi] + 2;
2450                 requirement.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2451             } break;
2452
2453             case 'D': flag_D = true; break;
2454
2455             case 'a': flag_a = true; break;
2456
2457             case 'A':
2458                 _assert(!flag_A);
2459                 flag_A = true;
2460                 if (argv[argi][2] != '\0') {
2461                     const char *cpu = argv[argi] + 2;
2462                     const char *colon = strchr(cpu, ':');
2463                     _assert(colon != NULL);
2464                     char *arge;
2465                     flag_CPUType = strtoul(cpu, &arge, 0);
2466                     _assert(arge == colon);
2467                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2468                     _assert(arge == argv[argi] + strlen(argv[argi]));
2469                 }
2470             break;
2471
2472             case 's':
2473                 _assert(!flag_r);
2474                 _assert(!flag_S);
2475                 flag_s = true;
2476             break;
2477
2478             case 'S':
2479                 _assert(!flag_r);
2480                 _assert(!flag_s);
2481                 flag_S = true;
2482                 if (argv[argi][2] != '\0') {
2483                     const char *xml = argv[argi] + 2;
2484                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2485                 }
2486             break;
2487
2488             case 'K':
2489                 if (argv[argi][2] != '\0')
2490                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2491             break;
2492
2493 #ifndef LDID_NOFLAGT
2494             case 'T': {
2495                 flag_T = true;
2496                 if (argv[argi][2] == '-')
2497                     timeh = true;
2498                 else {
2499                     char *arge;
2500                     timev = strtoul(argv[argi] + 2, &arge, 0);
2501                     _assert(arge == argv[argi] + strlen(argv[argi]));
2502                 }
2503             } break;
2504 #endif
2505
2506             case 'u': {
2507                 flag_u = true;
2508             } break;
2509
2510             case 'I': {
2511                 flag_I = argv[argi] + 2;
2512             } break;
2513
2514             default:
2515                 goto usage;
2516             break;
2517         }
2518
2519     _assert(flag_S || key.empty());
2520     _assert(flag_S || flag_I == NULL);
2521
2522     if (files.empty()) usage: {
2523         exit(0);
2524     }
2525
2526     size_t filei(0), filee(0);
2527     _foreach (file, files) try {
2528         std::string path(file);
2529
2530         struct stat info;
2531         _syscall(stat(path.c_str(), &info));
2532
2533         if (S_ISDIR(info.st_mode)) {
2534 #ifndef LDID_NOPLIST
2535             _assert(!flag_r);
2536             ldid::DiskFolder folder(path);
2537             path += "/" + Sign("", folder, key, requirement, ldid::fun([&](const std::string &, const std::string &) -> std::string { return entitlements; })
2538                 , ldid::fun([&](const std::string &) {}), ldid::fun(dummy)
2539             ).path;
2540 #else
2541             _assert(false);
2542 #endif
2543         } else if (flag_S || flag_r) {
2544             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2545
2546             std::filebuf output;
2547             Split split(path);
2548             auto temp(Temporary(output, split));
2549
2550             if (flag_r)
2551                 ldid::Unsign(input.data(), input.size(), output, ldid::fun(dummy));
2552             else {
2553                 std::string identifier(flag_I ?: split.base.c_str());
2554                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, requirement, key, slots, ldid::fun(dummy));
2555             }
2556
2557             Commit(path, temp);
2558         }
2559
2560         bool modify(false);
2561 #ifndef LDID_NOFLAGT
2562         if (flag_T)
2563             modify = true;
2564 #endif
2565         if (flag_s)
2566             modify = true;
2567
2568         Map mapping(path, modify);
2569         FatHeader fat_header(mapping.data(), mapping.size());
2570
2571         _foreach (mach_header, fat_header.GetMachHeaders()) {
2572             struct linkedit_data_command *signature(NULL);
2573             struct encryption_info_command *encryption(NULL);
2574
2575             if (flag_A) {
2576                 if (mach_header.GetCPUType() != flag_CPUType)
2577                     continue;
2578                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2579                     continue;
2580             }
2581
2582             if (flag_a)
2583                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2584
2585             _foreach (load_command, mach_header.GetLoadCommands()) {
2586                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2587
2588                 if (false);
2589                 else if (cmd == LC_CODE_SIGNATURE)
2590                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2591                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2592                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2593                 else if (cmd == LC_LOAD_DYLIB) {
2594                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2595                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2596
2597                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2598                         if (flag_u) {
2599                             Version version;
2600                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2601                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2602                         }
2603                     }
2604                 }
2605 #ifndef LDID_NOFLAGT
2606                 else if (cmd == LC_ID_DYLIB) {
2607                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2608
2609                     if (flag_T) {
2610                         uint32_t timed;
2611
2612                         if (!timeh)
2613                             timed = timev;
2614                         else {
2615                             dylib_command->dylib.timestamp = 0;
2616                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2617                         }
2618
2619                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2620                     }
2621                 }
2622 #endif
2623             }
2624
2625             if (flag_D) {
2626                 _assert(encryption != NULL);
2627                 encryption->cryptid = mach_header.Swap(0);
2628             }
2629
2630             if (flag_e) {
2631                 _assert(signature != NULL);
2632
2633                 uint32_t data = mach_header.Swap(signature->dataoff);
2634
2635                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2636                 uint8_t *blob = top + data;
2637                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2638
2639                 for (size_t index(0); index != Swap(super->count); ++index)
2640                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2641                         uint32_t begin = Swap(super->index[index].offset);
2642                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2643                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2644                     }
2645             }
2646
2647             if (flag_q) {
2648                 _assert(signature != NULL);
2649
2650                 uint32_t data = mach_header.Swap(signature->dataoff);
2651
2652                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2653                 uint8_t *blob = top + data;
2654                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2655
2656                 for (size_t index(0); index != Swap(super->count); ++index)
2657                     if (Swap(super->index[index].type) == CSSLOT_REQUIREMENTS) {
2658                         uint32_t begin = Swap(super->index[index].offset);
2659                         struct Blob *requirement = reinterpret_cast<struct Blob *>(blob + begin);
2660                         fwrite(requirement, 1, Swap(requirement->length), stdout);
2661                     }
2662             }
2663
2664             if (flag_s) {
2665                 _assert(signature != NULL);
2666
2667                 uint32_t data = mach_header.Swap(signature->dataoff);
2668
2669                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2670                 uint8_t *blob = top + data;
2671                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2672
2673                 for (size_t index(0); index != Swap(super->count); ++index)
2674                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2675                         uint32_t begin = Swap(super->index[index].offset);
2676                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin + sizeof(Blob));
2677
2678                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2679                         uint32_t pages = Swap(directory->nCodeSlots);
2680
2681                         if (pages != 1)
2682                             for (size_t i = 0; i != pages - 1; ++i)
2683                                 sha1(hashes[i], top + PageSize_ * i, PageSize_);
2684                         if (pages != 0)
2685                             sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1);
2686                     }
2687             }
2688         }
2689
2690         ++filei;
2691     } catch (const char *) {
2692         ++filee;
2693         ++filei;
2694     }
2695
2696     return filee;
2697 }
2698 #endif