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 #define CSSLOT_ALTERNATE     uint32_t(0x01000)
 823
 824 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 825
 826 #define CS_HASHTYPE_SHA160_160 1
 827 #define CS_HASHTYPE_SHA256_256 2
 828 #define CS_HASHTYPE_SHA256_160 3
 829 #define CS_HASHTYPE_SHA386_386 4
 830
 831 struct BlobIndex {
 832     uint32_t type;
 833     uint32_t offset;
 834 } _packed;
 835
 836 struct Blob {
 837     uint32_t magic;
 838     uint32_t length;
 839 } _packed;
 840
 841 struct SuperBlob {
 842     struct Blob blob;
 843     uint32_t count;
 844     struct BlobIndex index[];
 845 } _packed;
 846
 847 struct CodeDirectory {
 848     uint32_t version;
 849     uint32_t flags;
 850     uint32_t hashOffset;
 851     uint32_t identOffset;
 852     uint32_t nSpecialSlots;
 853     uint32_t nCodeSlots;
 854     uint32_t codeLimit;
 855     uint8_t hashSize;
 856     uint8_t hashType;
 857     uint8_t spare1;
 858     uint8_t pageSize;
 859     uint32_t spare2;
 860     uint32_t scatterOffset;
 861     uint32_t teamIDOffset;
 862     uint32_t spare3;
 863     uint64_t codeLimit64;
 864 } _packed;
 865
 866 #ifndef LDID_NOFLAGT
 867 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 868 #endif
 869
 870 struct Algorithm {
 871     size_t size_;
 872     uint8_t type_;
 873
 874     Algorithm(size_t size, uint8_t type) :
 875         size_(size),
 876         type_(type)
 877     {
 878     }
 879
 880     virtual const uint8_t *operator [](const ldid::Hash &hash) const = 0;
 881
 882     virtual void operator ()(uint8_t *hash, const void *data, size_t size) const = 0;
 883     virtual void operator ()(ldid::Hash &hash, const void *data, size_t size) const = 0;
 884     virtual void operator ()(std::vector<char> &hash, const void *data, size_t size) const = 0;
 885 };
 886
 887 struct AlgorithmSHA1 :
 888     Algorithm
 889 {
 890     AlgorithmSHA1() :
 891         Algorithm(LDID_SHA1_DIGEST_LENGTH, CS_HASHTYPE_SHA160_160)
 892     {
 893     }
 894
 895     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
 896         return hash.sha1_;
 897     }
 898
 899     void operator ()(uint8_t *hash, const void *data, size_t size) const {
 900         LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 901     }
 902
 903     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
 904         return operator()(hash.sha1_, data, size);
 905     }
 906
 907     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
 908         hash.resize(LDID_SHA1_DIGEST_LENGTH);
 909         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 910     }
 911 };
 912
 913 struct AlgorithmSHA256 :
 914     Algorithm
 915 {
 916     AlgorithmSHA256() :
 917         Algorithm(LDID_SHA256_DIGEST_LENGTH, CS_HASHTYPE_SHA256_256)
 918     {
 919     }
 920
 921     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
 922         return hash.sha256_;
 923     }
 924
 925     void operator ()(uint8_t *hash, const void *data, size_t size) const {
 926         LDID_SHA256(static_cast<const uint8_t *>(data), size, hash);
 927     }
 928
 929     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
 930         return operator()(hash.sha256_, data, size);
 931     }
 932
 933     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
 934         hash.resize(LDID_SHA256_DIGEST_LENGTH);
 935         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 936     }
 937 };
 938
 939 static const std::vector<Algorithm *> &GetAlgorithms() {
 940     static AlgorithmSHA1 sha1;
 941     static AlgorithmSHA256 sha256;
 942
 943     static Algorithm *array[] = {
 944         &sha1,
 945         &sha256,
 946     };
 947
 948     static std::vector<Algorithm *> algorithms(array, array + sizeof(array) / sizeof(array[0]));
 949     return algorithms;
 950 }
 951
 952 struct CodesignAllocation {
 953     FatMachHeader mach_header_;
 954     uint32_t offset_;
 955     uint32_t size_;
 956     uint32_t limit_;
 957     uint32_t alloc_;
 958     uint32_t align_;
 959
 960     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
 961         mach_header_(mach_header),
 962         offset_(offset),
 963         size_(size),
 964         limit_(limit),
 965         alloc_(alloc),
 966         align_(align)
 967     {
 968     }
 969 };
 970
 971 #ifndef LDID_NOTOOLS
 972 class File {
 973   private:
 974     int file_;
 975
 976   public:
 977     File() :
 978         file_(-1)
 979     {
 980     }
 981
 982     ~File() {
 983         if (file_ != -1)
 984             _syscall(close(file_));
 985     }
 986
 987     void open(const char *path, int flags) {
 988         _assert(file_ == -1);
 989         file_ = _syscall(::open(path, flags));
 990     }
 991
 992     int file() const {
 993         return file_;
 994     }
 995 };
 996
 997 class Map {
 998   private:
 999     File file_;
1000     void *data_;
1001     size_t size_;
1002
1003     void clear() {
1004         if (data_ == NULL)
1005             return;
1006         _syscall(munmap(data_, size_));
1007         data_ = NULL;
1008         size_ = 0;
1009     }
1010
1011   public:
1012     Map() :
1013         data_(NULL),
1014         size_(0)
1015     {
1016     }
1017
1018     Map(const std::string &path, int oflag, int pflag, int mflag) :
1019         Map()
1020     {
1021         open(path, oflag, pflag, mflag);
1022     }
1023
1024     Map(const std::string &path, bool edit) :
1025         Map()
1026     {
1027         open(path, edit);
1028     }
1029
1030     ~Map() {
1031         clear();
1032     }
1033
1034     bool empty() const {
1035         return data_ == NULL;
1036     }
1037
1038     void open(const std::string &path, int oflag, int pflag, int mflag) {
1039         clear();
1040
1041         file_.open(path.c_str(), oflag);
1042         int file(file_.file());
1043
1044         struct stat stat;
1045         _syscall(fstat(file, &stat));
1046         size_ = stat.st_size;
1047
1048         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
1049     }
1050
1051     void open(const std::string &path, bool edit) {
1052         if (edit)
1053             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
1054         else
1055             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
1056     }
1057
1058     void *data() const {
1059         return data_;
1060     }
1061
1062     size_t size() const {
1063         return size_;
1064     }
1065
1066     operator std::string() const {
1067         return std::string(static_cast<char *>(data_), size_);
1068     }
1069 };
1070 #endif
1071
1072 namespace ldid {
1073
1074 std::string Analyze(const void *data, size_t size) {
1075     std::string entitlements;
1076
1077     FatHeader fat_header(const_cast<void *>(data), size);
1078     _foreach (mach_header, fat_header.GetMachHeaders())
1079         _foreach (load_command, mach_header.GetLoadCommands())
1080             if (mach_header.Swap(load_command->cmd) == LC_CODE_SIGNATURE) {
1081                 auto signature(reinterpret_cast<struct linkedit_data_command *>(load_command));
1082                 auto offset(mach_header.Swap(signature->dataoff));
1083                 auto pointer(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + offset);
1084                 auto super(reinterpret_cast<struct SuperBlob *>(pointer));
1085
1086                 for (size_t index(0); index != Swap(super->count); ++index)
1087                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
1088                         auto begin(Swap(super->index[index].offset));
1089                         auto blob(reinterpret_cast<struct Blob *>(pointer + begin));
1090                         auto writ(Swap(blob->length) - sizeof(*blob));
1091
1092                         if (entitlements.empty())
1093                             entitlements.assign(reinterpret_cast<char *>(blob + 1), writ);
1094                         else
1095                             _assert(entitlements.compare(0, entitlements.size(), reinterpret_cast<char *>(blob + 1), writ) == 0);
1096                     }
1097             }
1098
1099     return entitlements;
1100 }
1101
1102 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) {
1103     FatHeader source(const_cast<void *>(idata), isize);
1104
1105     size_t offset(0);
1106     if (source.IsFat())
1107         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
1108
1109     std::vector<CodesignAllocation> allocations;
1110     _foreach (mach_header, source.GetMachHeaders()) {
1111         struct linkedit_data_command *signature(NULL);
1112         struct symtab_command *symtab(NULL);
1113
1114         _foreach (load_command, mach_header.GetLoadCommands()) {
1115             uint32_t cmd(mach_header.Swap(load_command->cmd));
1116             if (false);
1117             else if (cmd == LC_CODE_SIGNATURE)
1118                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1119             else if (cmd == LC_SYMTAB)
1120                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
1121         }
1122
1123         size_t size;
1124         if (signature == NULL)
1125             size = mach_header.GetSize();
1126         else {
1127             size = mach_header.Swap(signature->dataoff);
1128             _assert(size <= mach_header.GetSize());
1129         }
1130
1131         if (symtab != NULL) {
1132             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
1133             _assert(end <= size);
1134             _assert(end >= size - 0x10);
1135             size = end;
1136         }
1137
1138         size_t alloc(allocate(mach_header, size));
1139
1140         auto *fat_arch(mach_header.GetFatArch());
1141         uint32_t align;
1142
1143         if (fat_arch != NULL)
1144             align = source.Swap(fat_arch->align);
1145         else switch (mach_header.GetCPUType()) {
1146             case CPU_TYPE_POWERPC:
1147             case CPU_TYPE_POWERPC64:
1148             case CPU_TYPE_X86:
1149             case CPU_TYPE_X86_64:
1150                 align = 0xc;
1151                 break;
1152             case CPU_TYPE_ARM:
1153             case CPU_TYPE_ARM64:
1154                 align = 0xe;
1155                 break;
1156             default:
1157                 align = 0x0;
1158                 break;
1159         }
1160
1161         offset = Align(offset, 1 << align);
1162
1163         uint32_t limit(size);
1164         if (alloc != 0)
1165             limit = Align(limit, 0x10);
1166
1167         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
1168         offset += size + alloc;
1169         offset = Align(offset, 0x10);
1170     }
1171
1172     size_t position(0);
1173
1174     if (source.IsFat()) {
1175         fat_header fat_header;
1176         fat_header.magic = Swap(FAT_MAGIC);
1177         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1178         put(output, &fat_header, sizeof(fat_header));
1179         position += sizeof(fat_header);
1180
1181         _foreach (allocation, allocations) {
1182             auto &mach_header(allocation.mach_header_);
1183
1184             fat_arch fat_arch;
1185             fat_arch.cputype = Swap(mach_header->cputype);
1186             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1187             fat_arch.offset = Swap(allocation.offset_);
1188             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1189             fat_arch.align = Swap(allocation.align_);
1190             put(output, &fat_arch, sizeof(fat_arch));
1191             position += sizeof(fat_arch);
1192         }
1193     }
1194
1195     _foreach (allocation, allocations) {
1196         auto &mach_header(allocation.mach_header_);
1197
1198         pad(output, allocation.offset_ - position);
1199         position = allocation.offset_;
1200
1201         std::vector<std::string> commands;
1202
1203         _foreach (load_command, mach_header.GetLoadCommands()) {
1204             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1205
1206             switch (mach_header.Swap(load_command->cmd)) {
1207                 case LC_CODE_SIGNATURE:
1208                     continue;
1209                 break;
1210
1211                 case LC_SEGMENT: {
1212                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1213                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1214                         break;
1215                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1216                     segment_command->filesize = size;
1217                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1218                 } break;
1219
1220                 case LC_SEGMENT_64: {
1221                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1222                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1223                         break;
1224                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1225                     segment_command->filesize = size;
1226                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1227                 } break;
1228             }
1229
1230             commands.push_back(copy);
1231         }
1232
1233         if (allocation.alloc_ != 0) {
1234             linkedit_data_command signature;
1235             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1236             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1237             signature.dataoff = mach_header.Swap(allocation.limit_);
1238             signature.datasize = mach_header.Swap(allocation.alloc_);
1239             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1240         }
1241
1242         size_t begin(position);
1243
1244         uint32_t after(0);
1245         _foreach(command, commands)
1246             after += command.size();
1247
1248         std::stringbuf altern;
1249
1250         struct mach_header header(*mach_header);
1251         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1252         header.sizeofcmds = mach_header.Swap(after);
1253         put(output, &header, sizeof(header));
1254         put(altern, &header, sizeof(header));
1255         position += sizeof(header);
1256
1257         if (mach_header.Bits64()) {
1258             auto pad(mach_header.Swap(uint32_t(0)));
1259             put(output, &pad, sizeof(pad));
1260             put(altern, &pad, sizeof(pad));
1261             position += sizeof(pad);
1262         }
1263
1264         _foreach(command, commands) {
1265             put(output, command.data(), command.size());
1266             put(altern, command.data(), command.size());
1267             position += command.size();
1268         }
1269
1270         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1271         if (before > after) {
1272             pad(output, before - after);
1273             pad(altern, before - after);
1274             position += before - after;
1275         }
1276
1277         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1278
1279         std::string overlap(altern.str());
1280         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1281
1282         put(output, top + (position - begin), allocation.size_ - (position - begin), percent);
1283         position = begin + allocation.size_;
1284
1285         pad(output, allocation.limit_ - allocation.size_);
1286         position += allocation.limit_ - allocation.size_;
1287
1288         size_t saved(save(mach_header, output, allocation.limit_, overlap, top, percent));
1289         if (allocation.alloc_ > saved)
1290             pad(output, allocation.alloc_ - saved);
1291         else
1292             _assert(allocation.alloc_ == saved);
1293         position += allocation.alloc_;
1294     }
1295 }
1296
1297 }
1298
1299 typedef std::map<uint32_t, std::string> Blobs;
1300
1301 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1302     auto value(buffer.str());
1303     std::swap(blobs[slot], value);
1304 }
1305
1306 static const std::string &insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1307     auto value(buffer.str());
1308     Blob blob;
1309     blob.magic = Swap(magic);
1310     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1311     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1312     auto &save(blobs[slot]);
1313     std::swap(save, value);
1314     return save;
1315 }
1316
1317 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1318     size_t total(0);
1319     _foreach (blob, blobs)
1320         total += blob.second.size();
1321
1322     struct SuperBlob super;
1323     super.blob.magic = Swap(magic);
1324     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1325     super.count = Swap(uint32_t(blobs.size()));
1326     put(output, &super, sizeof(super));
1327
1328     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1329
1330     _foreach (blob, blobs) {
1331         BlobIndex index;
1332         index.type = Swap(blob.first);
1333         index.offset = Swap(uint32_t(offset));
1334         put(output, &index, sizeof(index));
1335         offset += blob.second.size();
1336     }
1337
1338     _foreach (blob, blobs)
1339         put(output, blob.second.data(), blob.second.size());
1340
1341     return offset;
1342 }
1343
1344 #ifndef LDID_NOSMIME
1345 class Buffer {
1346   private:
1347     BIO *bio_;
1348
1349   public:
1350     Buffer(BIO *bio) :
1351         bio_(bio)
1352     {
1353         _assert(bio_ != NULL);
1354     }
1355
1356     Buffer() :
1357         bio_(BIO_new(BIO_s_mem()))
1358     {
1359     }
1360
1361     Buffer(const char *data, size_t size) :
1362         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1363     {
1364     }
1365
1366     Buffer(const std::string &data) :
1367         Buffer(data.data(), data.size())
1368     {
1369     }
1370
1371     Buffer(PKCS7 *pkcs) :
1372         Buffer()
1373     {
1374         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1375     }
1376
1377     ~Buffer() {
1378         BIO_free_all(bio_);
1379     }
1380
1381     operator BIO *() const {
1382         return bio_;
1383     }
1384
1385     explicit operator std::string() const {
1386         char *data;
1387         auto size(BIO_get_mem_data(bio_, &data));
1388         return std::string(data, size);
1389     }
1390 };
1391
1392 class Stuff {
1393   private:
1394     PKCS12 *value_;
1395     EVP_PKEY *key_;
1396     X509 *cert_;
1397     STACK_OF(X509) *ca_;
1398
1399   public:
1400     Stuff(BIO *bio) :
1401         value_(d2i_PKCS12_bio(bio, NULL)),
1402         ca_(NULL)
1403     {
1404         _assert(value_ != NULL);
1405         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1406         _assert(key_ != NULL);
1407         _assert(cert_ != NULL);
1408     }
1409
1410     Stuff(const std::string &data) :
1411         Stuff(Buffer(data))
1412     {
1413     }
1414
1415     ~Stuff() {
1416         sk_X509_pop_free(ca_, X509_free);
1417         X509_free(cert_);
1418         EVP_PKEY_free(key_);
1419         PKCS12_free(value_);
1420     }
1421
1422     operator PKCS12 *() const {
1423         return value_;
1424     }
1425
1426     operator EVP_PKEY *() const {
1427         return key_;
1428     }
1429
1430     operator X509 *() const {
1431         return cert_;
1432     }
1433
1434     operator STACK_OF(X509) *() const {
1435         return ca_;
1436     }
1437 };
1438
1439 class Signature {
1440   private:
1441     PKCS7 *value_;
1442
1443   public:
1444     Signature(const Stuff &stuff, const Buffer &data) :
1445         value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED))
1446     {
1447         _assert(value_ != NULL);
1448     }
1449
1450     ~Signature() {
1451         PKCS7_free(value_);
1452     }
1453
1454     operator PKCS7 *() const {
1455         return value_;
1456     }
1457 };
1458 #endif
1459
1460 class NullBuffer :
1461     public std::streambuf
1462 {
1463   public:
1464     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1465         return size;
1466     }
1467
1468     virtual int_type overflow(int_type next) {
1469         return next;
1470     }
1471 };
1472
1473 class Digest {
1474   public:
1475     uint8_t sha1_[LDID_SHA1_DIGEST_LENGTH];
1476 };
1477
1478 class HashBuffer :
1479     public std::streambuf
1480 {
1481   private:
1482     ldid::Hash &hash_;
1483
1484     LDID_SHA1_CTX sha1_;
1485     LDID_SHA256_CTX sha256_;
1486
1487   public:
1488     HashBuffer(ldid::Hash &hash) :
1489         hash_(hash)
1490     {
1491         LDID_SHA1_Init(&sha1_);
1492         LDID_SHA256_Init(&sha256_);
1493     }
1494
1495     ~HashBuffer() {
1496         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.sha1_), &sha1_);
1497         LDID_SHA256_Final(reinterpret_cast<uint8_t *>(hash_.sha256_), &sha256_);
1498     }
1499
1500     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1501         LDID_SHA1_Update(&sha1_, data, size);
1502         LDID_SHA256_Update(&sha256_, data, size);
1503         return size;
1504     }
1505
1506     virtual int_type overflow(int_type next) {
1507         if (next == traits_type::eof())
1508             return sync();
1509         char value(next);
1510         xsputn(&value, 1);
1511         return next;
1512     }
1513 };
1514
1515 class HashProxy :
1516     public HashBuffer
1517 {
1518   private:
1519     std::streambuf &buffer_;
1520
1521   public:
1522     HashProxy(ldid::Hash &hash, std::streambuf &buffer) :
1523         HashBuffer(hash),
1524         buffer_(buffer)
1525     {
1526     }
1527
1528     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1529         _assert(HashBuffer::xsputn(data, size) == size);
1530         return buffer_.sputn(data, size);
1531     }
1532 };
1533
1534 #ifndef LDID_NOTOOLS
1535 static bool Starts(const std::string &lhs, const std::string &rhs) {
1536     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1537 }
1538
1539 class Split {
1540   public:
1541     std::string dir;
1542     std::string base;
1543
1544     Split(const std::string &path) {
1545         size_t slash(path.rfind('/'));
1546         if (slash == std::string::npos)
1547             base = path;
1548         else {
1549             dir = path.substr(0, slash + 1);
1550             base = path.substr(slash + 1);
1551         }
1552     }
1553 };
1554
1555 static void mkdir_p(const std::string &path) {
1556     if (path.empty())
1557         return;
1558 #ifdef __WIN32__
1559     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1560         return;
1561 #else
1562     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1563         return;
1564 #endif
1565     auto slash(path.rfind('/', path.size() - 1));
1566     if (slash == std::string::npos)
1567         return;
1568     mkdir_p(path.substr(0, slash));
1569 }
1570
1571 static std::string Temporary(std::filebuf &file, const Split &split) {
1572     std::string temp(split.dir + ".ldid." + split.base);
1573     mkdir_p(split.dir);
1574     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1575     return temp;
1576 }
1577
1578 static void Commit(const std::string &path, const std::string &temp) {
1579     struct stat info;
1580     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1581 #ifndef __WIN32__
1582         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1583 #endif
1584         _syscall(chmod(temp.c_str(), info.st_mode));
1585     }
1586
1587     _syscall(rename(temp.c_str(), path.c_str()));
1588 }
1589 #endif
1590
1591 namespace ldid {
1592
1593 Hash 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) {
1594     Hash hash;
1595
1596     std::string team;
1597
1598 #ifndef LDID_NOSMIME
1599     if (!key.empty()) {
1600         Stuff stuff(key);
1601         auto name(X509_get_subject_name(stuff));
1602         _assert(name != NULL);
1603         auto index(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, -1));
1604         _assert(index >= 0);
1605         auto next(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, index));
1606         _assert(next == -1);
1607         auto entry(X509_NAME_get_entry(name, index));
1608         _assert(entry != NULL);
1609         auto asn(X509_NAME_ENTRY_get_data(entry));
1610         _assert(asn != NULL);
1611         team.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1612     }
1613 #endif
1614
1615     // XXX: this is just a "sufficiently large number"
1616     size_t certificate(0x3000);
1617
1618     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1619         size_t alloc(sizeof(struct SuperBlob));
1620
1621         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1622
1623         uint32_t special(0);
1624
1625         _foreach (slot, slots)
1626             special = std::max(special, slot.first);
1627
1628         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1629             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1630                 special = std::max(special, CSSLOT_INFOSLOT);
1631         }));
1632
1633         special = std::max(special, CSSLOT_REQUIREMENTS);
1634         alloc += sizeof(struct BlobIndex);
1635         if (requirement.empty())
1636             alloc += 0xc;
1637         else
1638             alloc += requirement.size();
1639
1640         if (!entitlements.empty()) {
1641             special = std::max(special, CSSLOT_ENTITLEMENTS);
1642             alloc += sizeof(struct BlobIndex);
1643             alloc += sizeof(struct Blob);
1644             alloc += entitlements.size();
1645         }
1646
1647         size_t directory(0);
1648
1649         directory += sizeof(struct BlobIndex);
1650         directory += sizeof(struct Blob);
1651         directory += sizeof(struct CodeDirectory);
1652         directory += identifier.size() + 1;
1653
1654         if (!team.empty())
1655             directory += team.size() + 1;
1656
1657         for (Algorithm *algorithm : GetAlgorithms())
1658             alloc = Align(alloc + directory + (special + normal) * algorithm->size_, 16);
1659
1660         if (!key.empty()) {
1661             alloc += sizeof(struct BlobIndex);
1662             alloc += sizeof(struct Blob);
1663             alloc += certificate;
1664         }
1665
1666         return alloc;
1667     }), 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 {
1668         Blobs blobs;
1669
1670         if (true) {
1671             std::stringbuf data;
1672
1673             if (requirement.empty()) {
1674                 Blobs requirements;
1675                 put(data, CSMAGIC_REQUIREMENTS, requirements);
1676             } else {
1677                 put(data, requirement.data(), requirement.size());
1678             }
1679
1680             insert(blobs, CSSLOT_REQUIREMENTS, data);
1681         }
1682
1683         if (!entitlements.empty()) {
1684             std::stringbuf data;
1685             put(data, entitlements.data(), entitlements.size());
1686             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1687         }
1688
1689         Slots posts(slots);
1690
1691         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1692             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0) {
1693                 auto &slot(posts[CSSLOT_INFOSLOT]);
1694                 for (Algorithm *algorithm : GetAlgorithms())
1695                     (*algorithm)(slot, data, size);
1696             }
1697         }));
1698
1699         unsigned total(0);
1700         for (Algorithm *pointer : GetAlgorithms()) {
1701             Algorithm &algorithm(*pointer);
1702
1703             std::stringbuf data;
1704
1705             uint32_t special(0);
1706             _foreach (blob, blobs)
1707                 special = std::max(special, blob.first);
1708             _foreach (slot, posts)
1709                 special = std::max(special, slot.first);
1710             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1711
1712             CodeDirectory directory;
1713             directory.version = Swap(uint32_t(0x00020200));
1714             directory.flags = Swap(uint32_t(0));
1715             directory.nSpecialSlots = Swap(special);
1716             directory.codeLimit = Swap(uint32_t(limit));
1717             directory.nCodeSlots = Swap(normal);
1718             directory.hashSize = algorithm.size_;
1719             directory.hashType = algorithm.type_;
1720             directory.spare1 = 0x00;
1721             directory.pageSize = PageShift_;
1722             directory.spare2 = Swap(uint32_t(0));
1723             directory.scatterOffset = Swap(uint32_t(0));
1724             directory.spare3 = Swap(uint32_t(0));
1725             directory.codeLimit64 = Swap(uint64_t(0));
1726
1727             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1728
1729             directory.identOffset = Swap(uint32_t(offset));
1730             offset += identifier.size() + 1;
1731
1732             if (team.empty())
1733                 directory.teamIDOffset = Swap(uint32_t(0));
1734             else {
1735                 directory.teamIDOffset = Swap(uint32_t(offset));
1736                 offset += team.size() + 1;
1737             }
1738
1739             offset += special * algorithm.size_;
1740             directory.hashOffset = Swap(uint32_t(offset));
1741             offset += normal * algorithm.size_;
1742
1743             put(data, &directory, sizeof(directory));
1744
1745             put(data, identifier.c_str(), identifier.size() + 1);
1746             if (!team.empty())
1747                 put(data, team.c_str(), team.size() + 1);
1748
1749             std::vector<uint8_t> storage((special + normal) * algorithm.size_);
1750             auto *hashes(&storage[special * algorithm.size_]);
1751
1752             memset(storage.data(), 0, special * algorithm.size_);
1753
1754             _foreach (blob, blobs) {
1755                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1756                 algorithm(hashes - blob.first * algorithm.size_, local, Swap(local->length));
1757             }
1758
1759             _foreach (slot, posts)
1760                 memcpy(hashes - slot.first * algorithm.size_, algorithm[slot.second], algorithm.size_);
1761
1762             percent(0);
1763             if (normal != 1)
1764                 for (size_t i = 0; i != normal - 1; ++i) {
1765                     algorithm(hashes + i * algorithm.size_, (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1766                     percent(double(i) / normal);
1767                 }
1768             if (normal != 0)
1769                 algorithm(hashes + (normal - 1) * algorithm.size_, top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1770             percent(1);
1771
1772             put(data, storage.data(), storage.size());
1773
1774             const auto &save(insert(blobs, total == 0 ? CSSLOT_CODEDIRECTORY : CSSLOT_ALTERNATE + total - 1, CSMAGIC_CODEDIRECTORY, data));
1775             algorithm(hash, save.data(), save.size());
1776
1777             ++total;
1778         }
1779
1780 #ifndef LDID_NOSMIME
1781         if (!key.empty()) {
1782             std::stringbuf data;
1783             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1784
1785             Stuff stuff(key);
1786             Buffer bio(sign);
1787
1788             Signature signature(stuff, sign);
1789             Buffer result(signature);
1790             std::string value(result);
1791             put(data, value.data(), value.size());
1792
1793             const auto &save(insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data));
1794             _assert(save.size() <= certificate);
1795         }
1796 #endif
1797
1798         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1799     }), percent);
1800
1801     return hash;
1802 }
1803
1804 #ifndef LDID_NOTOOLS
1805 static void Unsign(void *idata, size_t isize, std::streambuf &output, const Functor<void (double)> &percent) {
1806     Allocate(idata, isize, output, fun([](const MachHeader &mach_header, size_t size) -> size_t {
1807         return 0;
1808     }), 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 {
1809         return 0;
1810     }), percent);
1811 }
1812
1813 std::string DiskFolder::Path(const std::string &path) const {
1814     return path_ + "/" + path;
1815 }
1816
1817 DiskFolder::DiskFolder(const std::string &path) :
1818     path_(path)
1819 {
1820 }
1821
1822 DiskFolder::~DiskFolder() {
1823     if (!std::uncaught_exception())
1824         for (const auto &commit : commit_)
1825             Commit(commit.first, commit.second);
1826 }
1827
1828 #ifndef __WIN32__
1829 std::string readlink(const std::string &path) {
1830     for (size_t size(1024); ; size *= 2) {
1831         std::string data;
1832         data.resize(size);
1833
1834         int writ(_syscall(::readlink(path.c_str(), &data[0], data.size())));
1835         if (size_t(writ) >= size)
1836             continue;
1837
1838         data.resize(writ);
1839         return data;
1840     }
1841 }
1842 #endif
1843
1844 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 {
1845     std::string path(Path(root) + base);
1846
1847     DIR *dir(opendir(path.c_str()));
1848     _assert(dir != NULL);
1849     _scope({ _syscall(closedir(dir)); });
1850
1851     while (auto child = readdir(dir)) {
1852         std::string name(child->d_name);
1853         if (name == "." || name == "..")
1854             continue;
1855         if (Starts(name, ".ldid."))
1856             continue;
1857
1858         bool directory;
1859
1860 #ifdef __WIN32__
1861         struct stat info;
1862         _syscall(stat((path + name).c_str(), &info));
1863         if (false);
1864         else if (S_ISDIR(info.st_mode))
1865             directory = true;
1866         else if (S_ISREG(info.st_mode))
1867             directory = false;
1868         else
1869             _assert_(false, "st_mode=%x", info.st_mode);
1870 #else
1871         switch (child->d_type) {
1872             case DT_DIR:
1873                 directory = true;
1874                 break;
1875             case DT_REG:
1876                 directory = false;
1877                 break;
1878             case DT_LNK:
1879                 link(base + name, fun([&]() { return readlink(path + name); }));
1880                 continue;
1881             default:
1882                 _assert_(false, "d_type=%u", child->d_type);
1883         }
1884 #endif
1885
1886         if (directory)
1887             Find(root, base + name + "/", code, link);
1888         else
1889             code(base + name);
1890     }
1891 }
1892
1893 void DiskFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
1894     if (!edit) {
1895         // XXX: use nullbuf
1896         std::stringbuf save;
1897         code(save);
1898     } else {
1899         std::filebuf save;
1900         auto from(Path(path));
1901         commit_[from] = Temporary(save, from);
1902         code(save);
1903     }
1904 }
1905
1906 bool DiskFolder::Look(const std::string &path) const {
1907     return _syscall(access(Path(path).c_str(), R_OK), ENOENT) == 0;
1908 }
1909
1910 void DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
1911     std::filebuf data;
1912     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
1913     _assert_(result == &data, "DiskFolder::Open(%s)", path.c_str());
1914
1915     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
1916     data.pubseekpos(0, std::ios::in);
1917     code(data, length, NULL);
1918 }
1919
1920 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 {
1921     Find(path, "", code, link);
1922 }
1923 #endif
1924
1925 SubFolder::SubFolder(Folder &parent, const std::string &path) :
1926     parent_(parent),
1927     path_(path)
1928 {
1929 }
1930
1931 void SubFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
1932     return parent_.Save(path_ + path, edit, flag, code);
1933 }
1934
1935 bool SubFolder::Look(const std::string &path) const {
1936     return parent_.Look(path_ + path);
1937 }
1938
1939 void SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
1940     return parent_.Open(path_ + path, code);
1941 }
1942
1943 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 {
1944     return parent_.Find(path_ + path, code, link);
1945 }
1946
1947 std::string UnionFolder::Map(const std::string &path) const {
1948     auto remap(remaps_.find(path));
1949     if (remap == remaps_.end())
1950         return path;
1951     return remap->second;
1952 }
1953
1954 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 {
1955     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
1956         code(file.substr(path.size()));
1957 }
1958
1959 UnionFolder::UnionFolder(Folder &parent) :
1960     parent_(parent)
1961 {
1962 }
1963
1964 void UnionFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
1965     return parent_.Save(Map(path), edit, flag, code);
1966 }
1967
1968 bool UnionFolder::Look(const std::string &path) const {
1969     auto file(resets_.find(path));
1970     if (file != resets_.end())
1971         return true;
1972     return parent_.Look(Map(path));
1973 }
1974
1975 void UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
1976     auto file(resets_.find(path));
1977     if (file == resets_.end())
1978         return parent_.Open(Map(path), code);
1979     auto &entry(file->second);
1980
1981     auto &data(*entry.data_);
1982     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
1983     data.pubseekpos(0, std::ios::in);
1984     code(data, length, entry.flag_);
1985 }
1986
1987 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 {
1988     for (auto &reset : resets_)
1989         Map(path, code, reset.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
1990             auto &entry(reset.second);
1991             auto &data(*entry.data_);
1992             auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
1993             data.pubseekpos(0, std::ios::in);
1994             code(data, length, entry.flag_);
1995         }));
1996
1997     for (auto &remap : remaps_)
1998         Map(path, code, remap.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
1999             parent_.Open(remap.second, fun([&](std::streambuf &data, size_t length, const void *flag) {
2000                 code(data, length, flag);
2001             }));
2002         }));
2003
2004     parent_.Find(path, fun([&](const std::string &name) {
2005         if (deletes_.find(path + name) == deletes_.end())
2006             code(name);
2007     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2008         if (deletes_.find(path + name) == deletes_.end())
2009             link(name, read);
2010     }));
2011 }
2012
2013 #ifndef LDID_NOTOOLS
2014 static void copy(std::streambuf &source, std::streambuf &target, size_t length, const ldid::Functor<void (double)> &percent) {
2015     percent(0);
2016     size_t total(0);
2017     for (;;) {
2018         char data[4096 * 4];
2019         size_t writ(source.sgetn(data, sizeof(data)));
2020         if (writ == 0)
2021             break;
2022         _assert(target.sputn(data, writ) == writ);
2023         total += writ;
2024         percent(double(total) / length);
2025     }
2026 }
2027
2028 #ifndef LDID_NOPLIST
2029 static plist_t plist(const std::string &data) {
2030     plist_t plist(NULL);
2031     if (Starts(data, "bplist00"))
2032         plist_from_bin(data.data(), data.size(), &plist);
2033     else
2034         plist_from_xml(data.data(), data.size(), &plist);
2035     _assert(plist != NULL);
2036     return plist;
2037 }
2038
2039 static void plist_d(std::streambuf &buffer, size_t length, const Functor<void (plist_t)> &code) {
2040     std::stringbuf data;
2041     copy(buffer, data, length, ldid::fun(dummy));
2042     auto node(plist(data.str()));
2043     _scope({ plist_free(node); });
2044     _assert(plist_get_node_type(node) == PLIST_DICT);
2045     code(node);
2046 }
2047
2048 static std::string plist_s(plist_t node) {
2049     _assert(node != NULL);
2050     _assert(plist_get_node_type(node) == PLIST_STRING);
2051     char *data;
2052     plist_get_string_val(node, &data);
2053     _scope({ free(data); });
2054     return data;
2055 }
2056 #endif
2057
2058 enum Mode {
2059     NoMode,
2060     OptionalMode,
2061     OmitMode,
2062     NestedMode,
2063     TopMode,
2064 };
2065
2066 class Expression {
2067   private:
2068     regex_t regex_;
2069     std::vector<std::string> matches_;
2070
2071   public:
2072     Expression(const std::string &code) {
2073         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED) == 0, "regcomp()");
2074         matches_.resize(regex_.re_nsub + 1);
2075     }
2076
2077     ~Expression() {
2078         regfree(&regex_);
2079     }
2080
2081     bool operator ()(const std::string &data) {
2082         regmatch_t matches[matches_.size()];
2083         auto value(regexec(&regex_, data.c_str(), matches_.size(), matches, 0));
2084         if (value == REG_NOMATCH)
2085             return false;
2086         _assert_(value == 0, "regexec()");
2087         for (size_t i(0); i != matches_.size(); ++i)
2088             matches_[i].assign(data.data() + matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so);
2089         return true;
2090     }
2091
2092     const std::string &operator [](size_t index) const {
2093         return matches_[index];
2094     }
2095 };
2096
2097 struct Rule {
2098     unsigned weight_;
2099     Mode mode_;
2100     std::string code_;
2101
2102     mutable std::auto_ptr<Expression> regex_;
2103
2104     Rule(unsigned weight, Mode mode, const std::string &code) :
2105         weight_(weight),
2106         mode_(mode),
2107         code_(code)
2108     {
2109     }
2110
2111     Rule(const Rule &rhs) :
2112         weight_(rhs.weight_),
2113         mode_(rhs.mode_),
2114         code_(rhs.code_)
2115     {
2116     }
2117
2118     void Compile() const {
2119         regex_.reset(new Expression(code_));
2120     }
2121
2122     bool operator ()(const std::string &data) const {
2123         _assert(regex_.get() != NULL);
2124         return (*regex_)(data);
2125     }
2126
2127     bool operator <(const Rule &rhs) const {
2128         if (weight_ > rhs.weight_)
2129             return true;
2130         if (weight_ < rhs.weight_)
2131             return false;
2132         return mode_ > rhs.mode_;
2133     }
2134 };
2135
2136 struct RuleCode {
2137     bool operator ()(const Rule *lhs, const Rule *rhs) const {
2138         return lhs->code_ < rhs->code_;
2139     }
2140 };
2141
2142 #ifndef LDID_NOPLIST
2143 static Hash 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) {
2144     // XXX: this is a miserable fail
2145     std::stringbuf temp;
2146     put(temp, prefix, size);
2147     copy(buffer, temp, length - size, percent);
2148     // XXX: this is a stupid hack
2149     pad(temp, 0x10 - (length & 0xf));
2150     auto data(temp.str());
2151
2152     HashProxy proxy(hash, save);
2153     return Sign(data.data(), data.size(), proxy, identifier, entitlements, requirement, key, slots, percent);
2154 }
2155
2156 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) {
2157     std::string executable;
2158     std::string identifier;
2159
2160     bool mac(false);
2161
2162     std::string info("Info.plist");
2163     if (!folder.Look(info) && folder.Look("Resources/" + info)) {
2164         mac = true;
2165         info = "Resources/" + info;
2166     }
2167
2168     folder.Open(info, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2169         plist_d(buffer, length, fun([&](plist_t node) {
2170             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
2171             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
2172         }));
2173     }));
2174
2175     if (!mac && folder.Look("MacOS/" + executable)) {
2176         executable = "MacOS/" + executable;
2177         mac = true;
2178     }
2179
2180     std::string entitlements;
2181     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2182         // XXX: this is a miserable fail
2183         std::stringbuf temp;
2184         copy(buffer, temp, length, percent);
2185         // XXX: this is a stupid hack
2186         pad(temp, 0x10 - (length & 0xf));
2187         auto data(temp.str());
2188         entitlements = alter(root, Analyze(data.data(), data.size()));
2189     }));
2190
2191     static const std::string directory("_CodeSignature/");
2192     static const std::string signature(directory + "CodeResources");
2193
2194     std::map<std::string, std::multiset<Rule>> versions;
2195
2196     auto &rules1(versions[""]);
2197     auto &rules2(versions["2"]);
2198
2199     const std::string resources(mac ? "Resources/" : "");
2200
2201     if (true) {
2202         rules1.insert(Rule{1, NoMode, "^" + resources});
2203         if (!mac) rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2204         rules1.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2205         rules1.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2206         if (!mac) rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2207         rules1.insert(Rule{1, NoMode, "^version.plist$"});
2208     }
2209
2210     if (true) {
2211         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
2212         rules2.insert(Rule{20, NoMode, "^" + resources});
2213         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
2214         if (!mac) rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2215         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
2216         rules2.insert(Rule{1, NoMode, "^.*"});
2217         rules2.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2218         rules2.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2219         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
2220         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
2221         if (!mac) rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2222         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
2223         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
2224         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
2225     }
2226
2227     std::map<std::string, Hash> local;
2228
2229     std::string failure(mac ? "Contents/|Versions/[^/]*/Resources/" : "");
2230     Expression nested("^(Frameworks/[^/]*\\.framework|PlugIns/[^/]*\\.appex(()|/[^/]*.app))/(" + failure + ")Info\\.plist$");
2231     std::map<std::string, Bundle> bundles;
2232
2233     folder.Find("", fun([&](const std::string &name) {
2234         if (!nested(name))
2235             return;
2236         auto bundle(root + Split(name).dir);
2237         bundle.resize(bundle.size() - resources.size());
2238         SubFolder subfolder(folder, bundle);
2239
2240         bundles[nested[1]] = Sign(bundle, subfolder, key, local, "", Starts(name, "PlugIns/") ? alter :
2241             static_cast<const Functor<std::string (const std::string &, const std::string &)> &>(fun([&](const std::string &, const std::string &entitlements) -> std::string { return entitlements; }))
2242         , progress, percent);
2243     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2244     }));
2245
2246     std::set<std::string> excludes;
2247
2248     auto exclude([&](const std::string &name) {
2249         // BundleDiskRep::adjustResources -> builder.addExclusion
2250         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
2251             return true;
2252
2253         for (const auto &bundle : bundles)
2254             if (Starts(name, bundle.first + "/")) {
2255                 excludes.insert(name);
2256                 return true;
2257             }
2258
2259         return false;
2260     });
2261
2262     std::map<std::string, std::string> links;
2263
2264     folder.Find("", fun([&](const std::string &name) {
2265         if (exclude(name))
2266             return;
2267
2268         if (local.find(name) != local.end())
2269             return;
2270         auto &hash(local[name]);
2271
2272         folder.Open(name, fun([&](std::streambuf &data, size_t length, const void *flag) {
2273             progress(root + name);
2274
2275             union {
2276                 struct {
2277                     uint32_t magic;
2278                     uint32_t count;
2279                 };
2280
2281                 uint8_t bytes[8];
2282             } header;
2283
2284             auto size(most(data, &header.bytes, sizeof(header.bytes)));
2285
2286             if (name != "_WatchKitStub/WK" && size == sizeof(header.bytes))
2287                 switch (Swap(header.magic)) {
2288                     case FAT_MAGIC:
2289                         // Java class file format
2290                         if (Swap(header.count) >= 40)
2291                             break;
2292                     case FAT_CIGAM:
2293                     case MH_MAGIC: case MH_MAGIC_64:
2294                     case MH_CIGAM: case MH_CIGAM_64:
2295                         folder.Save(name, true, flag, fun([&](std::streambuf &save) {
2296                             Slots slots;
2297                             Sign(header.bytes, size, data, hash, save, identifier, "", "", key, slots, length, percent);
2298                         }));
2299                         return;
2300                 }
2301
2302             folder.Save(name, false, flag, fun([&](std::streambuf &save) {
2303                 HashProxy proxy(hash, save);
2304                 put(proxy, header.bytes, size);
2305                 copy(data, proxy, length - size, percent);
2306             }));
2307         }));
2308     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2309         if (exclude(name))
2310             return;
2311
2312         links[name] = read();
2313     }));
2314
2315     auto plist(plist_new_dict());
2316     _scope({ plist_free(plist); });
2317
2318     for (const auto &version : versions) {
2319         auto files(plist_new_dict());
2320         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2321
2322         for (const auto &rule : version.second)
2323             rule.Compile();
2324
2325         bool old(&version.second == &rules1);
2326
2327         for (const auto &hash : local)
2328             for (const auto &rule : version.second)
2329                 if (rule(hash.first)) {
2330                     if (!old && mac && excludes.find(hash.first) != excludes.end());
2331                     else if (old && rule.mode_ == NoMode)
2332                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2333                     else if (rule.mode_ != OmitMode) {
2334                         auto entry(plist_new_dict());
2335                         plist_dict_set_item(entry, "hash", plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2336                         if (!old)
2337                             plist_dict_set_item(entry, "hash2", plist_new_data(reinterpret_cast<const char *>(hash.second.sha256_), sizeof(hash.second.sha256_)));
2338                         if (rule.mode_ == OptionalMode)
2339                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2340                         plist_dict_set_item(files, hash.first.c_str(), entry);
2341                     }
2342
2343                     break;
2344                 }
2345
2346         for (const auto &link : links)
2347             for (const auto &rule : version.second)
2348                 if (rule(link.first)) {
2349                     if (rule.mode_ != OmitMode) {
2350                         auto entry(plist_new_dict());
2351                         plist_dict_set_item(entry, "symlink", plist_new_string(link.second.c_str()));
2352                         if (rule.mode_ == OptionalMode)
2353                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2354                         plist_dict_set_item(files, link.first.c_str(), entry);
2355                     }
2356
2357                     break;
2358                 }
2359
2360         if (!old && mac)
2361             for (const auto &bundle : bundles) {
2362                 auto entry(plist_new_dict());
2363                 plist_dict_set_item(entry, "cdhash", plist_new_data(reinterpret_cast<const char *>(bundle.second.hash.sha256_), sizeof(bundle.second.hash.sha256_)));
2364                 plist_dict_set_item(entry, "requirement", plist_new_string("anchor apple generic"));
2365                 plist_dict_set_item(files, bundle.first.c_str(), entry);
2366             }
2367     }
2368
2369     for (const auto &version : versions) {
2370         auto rules(plist_new_dict());
2371         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2372
2373         std::multiset<const Rule *, RuleCode> ordered;
2374         for (const auto &rule : version.second)
2375             ordered.insert(&rule);
2376
2377         for (const auto &rule : ordered)
2378             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2379                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2380             else {
2381                 auto entry(plist_new_dict());
2382                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2383
2384                 switch (rule->mode_) {
2385                     case NoMode:
2386                         break;
2387                     case OmitMode:
2388                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2389                         break;
2390                     case OptionalMode:
2391                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2392                         break;
2393                     case NestedMode:
2394                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2395                         break;
2396                     case TopMode:
2397                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2398                         break;
2399                 }
2400
2401                 if (rule->weight_ >= 10000)
2402                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2403                 else if (rule->weight_ != 1)
2404                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2405             }
2406     }
2407
2408     folder.Save(signature, true, NULL, fun([&](std::streambuf &save) {
2409         HashProxy proxy(local[signature], save);
2410         char *xml(NULL);
2411         uint32_t size;
2412         plist_to_xml(plist, &xml, &size);
2413         _scope({ free(xml); });
2414         put(proxy, xml, size);
2415     }));
2416
2417     Bundle bundle;
2418     bundle.path = executable;
2419
2420     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2421         progress(root + executable);
2422         folder.Save(executable, true, flag, fun([&](std::streambuf &save) {
2423             Slots slots;
2424             slots[1] = local.at(info);
2425             slots[3] = local.at(signature);
2426             bundle.hash = Sign(NULL, 0, buffer, local[executable], save, identifier, entitlements, requirement, key, slots, length, percent);
2427         }));
2428     }));
2429
2430     for (const auto &entry : local)
2431         remote[root + entry.first] = entry.second;
2432
2433     return bundle;
2434 }
2435
2436 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) {
2437     std::map<std::string, Hash> local;
2438     return Sign(root, folder, key, local, requirement, alter, progress, percent);
2439 }
2440 #endif
2441
2442 #endif
2443 }
2444
2445 #ifndef LDID_NOTOOLS
2446 int main(int argc, char *argv[]) {
2447 #ifndef LDID_NOSMIME
2448     OpenSSL_add_all_algorithms();
2449 #endif
2450
2451     union {
2452         uint16_t word;
2453         uint8_t byte[2];
2454     } endian = {1};
2455
2456     little_ = endian.byte[0];
2457
2458     bool flag_r(false);
2459     bool flag_e(false);
2460     bool flag_q(false);
2461
2462 #ifndef LDID_NOFLAGT
2463     bool flag_T(false);
2464 #endif
2465
2466     bool flag_S(false);
2467     bool flag_s(false);
2468
2469     bool flag_D(false);
2470
2471     bool flag_A(false);
2472     bool flag_a(false);
2473
2474     bool flag_u(false);
2475
2476     uint32_t flag_CPUType(_not(uint32_t));
2477     uint32_t flag_CPUSubtype(_not(uint32_t));
2478
2479     const char *flag_I(NULL);
2480
2481 #ifndef LDID_NOFLAGT
2482     bool timeh(false);
2483     uint32_t timev(0);
2484 #endif
2485
2486     Map entitlements;
2487     Map requirement;
2488     Map key;
2489     ldid::Slots slots;
2490
2491     std::vector<std::string> files;
2492
2493     if (argc == 1) {
2494         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2495         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2496         fprintf(stderr, "   %s -S cat\n", argv[0]);
2497         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2498         exit(0);
2499     }
2500
2501     for (int argi(1); argi != argc; ++argi)
2502         if (argv[argi][0] != '-')
2503             files.push_back(argv[argi]);
2504         else switch (argv[argi][1]) {
2505             case 'r':
2506                 _assert(!flag_s);
2507                 _assert(!flag_S);
2508                 flag_r = true;
2509             break;
2510
2511             case 'e': flag_e = true; break;
2512
2513             case 'E': {
2514                 const char *string = argv[argi] + 2;
2515                 const char *colon = strchr(string, ':');
2516                 _assert(colon != NULL);
2517                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2518                 char *arge;
2519                 unsigned number(strtoul(string, &arge, 0));
2520                 _assert(arge == colon);
2521                 auto &slot(slots[number]);
2522                 for (Algorithm *algorithm : GetAlgorithms())
2523                     (*algorithm)(slot, file.data(), file.size());
2524             } break;
2525
2526             case 'q': flag_q = true; break;
2527
2528             case 'Q': {
2529                 const char *xml = argv[argi] + 2;
2530                 requirement.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2531             } break;
2532
2533             case 'D': flag_D = true; break;
2534
2535             case 'a': flag_a = true; break;
2536
2537             case 'A':
2538                 _assert(!flag_A);
2539                 flag_A = true;
2540                 if (argv[argi][2] != '\0') {
2541                     const char *cpu = argv[argi] + 2;
2542                     const char *colon = strchr(cpu, ':');
2543                     _assert(colon != NULL);
2544                     char *arge;
2545                     flag_CPUType = strtoul(cpu, &arge, 0);
2546                     _assert(arge == colon);
2547                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2548                     _assert(arge == argv[argi] + strlen(argv[argi]));
2549                 }
2550             break;
2551
2552             case 's':
2553                 _assert(!flag_r);
2554                 _assert(!flag_S);
2555                 flag_s = true;
2556             break;
2557
2558             case 'S':
2559                 _assert(!flag_r);
2560                 _assert(!flag_s);
2561                 flag_S = true;
2562                 if (argv[argi][2] != '\0') {
2563                     const char *xml = argv[argi] + 2;
2564                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2565                 }
2566             break;
2567
2568             case 'K':
2569                 if (argv[argi][2] != '\0')
2570                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2571             break;
2572
2573 #ifndef LDID_NOFLAGT
2574             case 'T': {
2575                 flag_T = true;
2576                 if (argv[argi][2] == '-')
2577                     timeh = true;
2578                 else {
2579                     char *arge;
2580                     timev = strtoul(argv[argi] + 2, &arge, 0);
2581                     _assert(arge == argv[argi] + strlen(argv[argi]));
2582                 }
2583             } break;
2584 #endif
2585
2586             case 'u': {
2587                 flag_u = true;
2588             } break;
2589
2590             case 'I': {
2591                 flag_I = argv[argi] + 2;
2592             } break;
2593
2594             default:
2595                 goto usage;
2596             break;
2597         }
2598
2599     _assert(flag_S || key.empty());
2600     _assert(flag_S || flag_I == NULL);
2601
2602     if (files.empty()) usage: {
2603         exit(0);
2604     }
2605
2606     size_t filei(0), filee(0);
2607     _foreach (file, files) try {
2608         std::string path(file);
2609
2610         struct stat info;
2611         _syscall(stat(path.c_str(), &info));
2612
2613         if (S_ISDIR(info.st_mode)) {
2614 #ifndef LDID_NOPLIST
2615             _assert(!flag_r);
2616             ldid::DiskFolder folder(path);
2617             path += "/" + Sign("", folder, key, requirement, ldid::fun([&](const std::string &, const std::string &) -> std::string { return entitlements; })
2618                 , ldid::fun([&](const std::string &) {}), ldid::fun(dummy)
2619             ).path;
2620 #else
2621             _assert(false);
2622 #endif
2623         } else if (flag_S || flag_r) {
2624             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2625
2626             std::filebuf output;
2627             Split split(path);
2628             auto temp(Temporary(output, split));
2629
2630             if (flag_r)
2631                 ldid::Unsign(input.data(), input.size(), output, ldid::fun(dummy));
2632             else {
2633                 std::string identifier(flag_I ?: split.base.c_str());
2634                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, requirement, key, slots, ldid::fun(dummy));
2635             }
2636
2637             Commit(path, temp);
2638         }
2639
2640         bool modify(false);
2641 #ifndef LDID_NOFLAGT
2642         if (flag_T)
2643             modify = true;
2644 #endif
2645         if (flag_s)
2646             modify = true;
2647
2648         Map mapping(path, modify);
2649         FatHeader fat_header(mapping.data(), mapping.size());
2650
2651         _foreach (mach_header, fat_header.GetMachHeaders()) {
2652             struct linkedit_data_command *signature(NULL);
2653             struct encryption_info_command *encryption(NULL);
2654
2655             if (flag_A) {
2656                 if (mach_header.GetCPUType() != flag_CPUType)
2657                     continue;
2658                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2659                     continue;
2660             }
2661
2662             if (flag_a)
2663                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2664
2665             _foreach (load_command, mach_header.GetLoadCommands()) {
2666                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2667
2668                 if (false);
2669                 else if (cmd == LC_CODE_SIGNATURE)
2670                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2671                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2672                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2673                 else if (cmd == LC_LOAD_DYLIB) {
2674                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2675                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2676
2677                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2678                         if (flag_u) {
2679                             Version version;
2680                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2681                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2682                         }
2683                     }
2684                 }
2685 #ifndef LDID_NOFLAGT
2686                 else if (cmd == LC_ID_DYLIB) {
2687                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2688
2689                     if (flag_T) {
2690                         uint32_t timed;
2691
2692                         if (!timeh)
2693                             timed = timev;
2694                         else {
2695                             dylib_command->dylib.timestamp = 0;
2696                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2697                         }
2698
2699                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2700                     }
2701                 }
2702 #endif
2703             }
2704
2705             if (flag_D) {
2706                 _assert(encryption != NULL);
2707                 encryption->cryptid = mach_header.Swap(0);
2708             }
2709
2710             if (flag_e) {
2711                 _assert(signature != NULL);
2712
2713                 uint32_t data = mach_header.Swap(signature->dataoff);
2714
2715                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2716                 uint8_t *blob = top + data;
2717                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2718
2719                 for (size_t index(0); index != Swap(super->count); ++index)
2720                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2721                         uint32_t begin = Swap(super->index[index].offset);
2722                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2723                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2724                     }
2725             }
2726
2727             if (flag_q) {
2728                 _assert(signature != NULL);
2729
2730                 uint32_t data = mach_header.Swap(signature->dataoff);
2731
2732                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2733                 uint8_t *blob = top + data;
2734                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2735
2736                 for (size_t index(0); index != Swap(super->count); ++index)
2737                     if (Swap(super->index[index].type) == CSSLOT_REQUIREMENTS) {
2738                         uint32_t begin = Swap(super->index[index].offset);
2739                         struct Blob *requirement = reinterpret_cast<struct Blob *>(blob + begin);
2740                         fwrite(requirement, 1, Swap(requirement->length), stdout);
2741                     }
2742             }
2743
2744             if (flag_s) {
2745                 _assert(signature != NULL);
2746
2747                 uint32_t data = mach_header.Swap(signature->dataoff);
2748
2749                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2750                 uint8_t *blob = top + data;
2751                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2752
2753                 for (size_t index(0); index != Swap(super->count); ++index)
2754                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2755                         uint32_t begin = Swap(super->index[index].offset);
2756                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin + sizeof(Blob));
2757
2758                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2759                         uint32_t pages = Swap(directory->nCodeSlots);
2760
2761                         if (pages != 1)
2762                             for (size_t i = 0; i != pages - 1; ++i)
2763                                 LDID_SHA1(top + PageSize_ * i, PageSize_, hashes[i]);
2764                         if (pages != 0)
2765                             LDID_SHA1(top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1, hashes[pages - 1]);
2766                     }
2767             }
2768         }
2769
2770         ++filei;
2771     } catch (const char *) {
2772         ++filee;
2773         ++filei;
2774     }
2775
2776     return filee;
2777 }
2778 #endif