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 #ifndef $
  98 #define $(value) value
  99 #endif
 100
 101 #ifdef __EXCEPTIONS
 102 #define _assert_(expr, format, ...) \
 103     do if (!(expr)) { \
 104         fprintf(stderr, $("%s(%u): _assert(): " format "\n"), __FILE__, __LINE__, ## __VA_ARGS__); \
 105         throw $(__FILE__ "(" _assert__(__LINE__) "): _assert(" #expr ")"); \
 106     } while (false)
 107 #else
 108 // XXX: this is not acceptable
 109 #define _assert_(expr, format, ...) \
 110     do if (!(expr)) { \
 111         fprintf(stderr, $("%s(%u): _assert(): " format "\n"), __FILE__, __LINE__, ## __VA_ARGS__); \
 112         exit(-1); \
 113     } while (false)
 114 #endif
 115
 116 #define _assert(expr) \
 117     _assert_(expr, "%s", $(#expr))
 118
 119 #define _syscall(expr, ...) [&] { for (;;) { \
 120     auto _value(expr); \
 121     if ((long) _value != -1) \
 122         return _value; \
 123     int error(errno); \
 124     if (error == EINTR) \
 125         continue; \
 126     /* XXX: EINTR is included in this list to fix g++ */ \
 127     for (auto success : (long[]) {EINTR, __VA_ARGS__}) \
 128         if (error == success) \
 129             return (decltype(expr)) -success; \
 130     _assert_(false, "errno=%u", error); \
 131 } }()
 132
 133 #define _trace() \
 134     fprintf(stderr, $("_trace(%s:%u): %s\n"), __FILE__, __LINE__, $(__FUNCTION__))
 135
 136 #define _not(type) \
 137     ((type) ~ (type) 0)
 138
 139 #define _packed \
 140     __attribute__((packed))
 141
 142 template <typename Type_>
 143 struct Iterator_ {
 144     typedef typename Type_::const_iterator Result;
 145 };
 146
 147 #define _foreach(item, list) \
 148     for (bool _stop(true); _stop; ) \
 149         for (const __typeof__(list) &_list = (list); _stop; _stop = false) \
 150             for (Iterator_<__typeof__(list)>::Result _item = _list.begin(); _item != _list.end(); ++_item) \
 151                 for (bool _suck(true); _suck; _suck = false) \
 152                     for (const __typeof__(*_item) &item = *_item; _suck; _suck = false)
 153
 154 class _Scope {
 155 };
 156
 157 template <typename Function_>
 158 class Scope :
 159     public _Scope
 160 {
 161   private:
 162     Function_ function_;
 163
 164   public:
 165     Scope(const Function_ &function) :
 166         function_(function)
 167     {
 168     }
 169
 170     ~Scope() {
 171         function_();
 172     }
 173 };
 174
 175 template <typename Function_>
 176 Scope<Function_> _scope(const Function_ &function) {
 177     return Scope<Function_>(function);
 178 }
 179
 180 #define _scope__(counter, function) \
 181     __attribute__((__unused__)) \
 182     const _Scope &_scope ## counter(_scope([&]function))
 183 #define _scope_(counter, function) \
 184     _scope__(counter, function)
 185 #define _scope(function) \
 186     _scope_(__COUNTER__, function)
 187
 188 #define CPU_ARCH_MASK  uint32_t(0xff000000)
 189 #define CPU_ARCH_ABI64 uint32_t(0x01000000)
 190
 191 #define CPU_TYPE_ANY     uint32_t(-1)
 192 #define CPU_TYPE_VAX     uint32_t( 1)
 193 #define CPU_TYPE_MC680x0 uint32_t( 6)
 194 #define CPU_TYPE_X86     uint32_t( 7)
 195 #define CPU_TYPE_MC98000 uint32_t(10)
 196 #define CPU_TYPE_HPPA    uint32_t(11)
 197 #define CPU_TYPE_ARM     uint32_t(12)
 198 #define CPU_TYPE_MC88000 uint32_t(13)
 199 #define CPU_TYPE_SPARC   uint32_t(14)
 200 #define CPU_TYPE_I860    uint32_t(15)
 201 #define CPU_TYPE_POWERPC uint32_t(18)
 202
 203 #define CPU_TYPE_I386 CPU_TYPE_X86
 204
 205 #define CPU_TYPE_ARM64     (CPU_ARCH_ABI64 | CPU_TYPE_ARM)
 206 #define CPU_TYPE_POWERPC64 (CPU_ARCH_ABI64 | CPU_TYPE_POWERPC)
 207 #define CPU_TYPE_X86_64    (CPU_ARCH_ABI64 | CPU_TYPE_X86)
 208
 209 struct fat_header {
 210     uint32_t magic;
 211     uint32_t nfat_arch;
 212 } _packed;
 213
 214 #define FAT_MAGIC 0xcafebabe
 215 #define FAT_CIGAM 0xbebafeca
 216
 217 struct fat_arch {
 218     uint32_t cputype;
 219     uint32_t cpusubtype;
 220     uint32_t offset;
 221     uint32_t size;
 222     uint32_t align;
 223 } _packed;
 224
 225 struct mach_header {
 226     uint32_t magic;
 227     uint32_t cputype;
 228     uint32_t cpusubtype;
 229     uint32_t filetype;
 230     uint32_t ncmds;
 231     uint32_t sizeofcmds;
 232     uint32_t flags;
 233 } _packed;
 234
 235 #define MH_MAGIC 0xfeedface
 236 #define MH_CIGAM 0xcefaedfe
 237
 238 #define MH_MAGIC_64 0xfeedfacf
 239 #define MH_CIGAM_64 0xcffaedfe
 240
 241 #define MH_DYLDLINK   0x4
 242
 243 #define MH_OBJECT     0x1
 244 #define MH_EXECUTE    0x2
 245 #define MH_DYLIB      0x6
 246 #define MH_BUNDLE     0x8
 247 #define MH_DYLIB_STUB 0x9
 248
 249 struct load_command {
 250     uint32_t cmd;
 251     uint32_t cmdsize;
 252 } _packed;
 253
 254 #define LC_REQ_DYLD           uint32_t(0x80000000)
 255
 256 #define LC_SEGMENT            uint32_t(0x01)
 257 #define LC_SYMTAB             uint32_t(0x02)
 258 #define LC_DYSYMTAB           uint32_t(0x0b)
 259 #define LC_LOAD_DYLIB         uint32_t(0x0c)
 260 #define LC_ID_DYLIB           uint32_t(0x0d)
 261 #define LC_SEGMENT_64         uint32_t(0x19)
 262 #define LC_UUID               uint32_t(0x1b)
 263 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
 264 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
 265 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
 266 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
 267 #define LC_DYLD_INFO          uint32_t(0x22)
 268 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
 269 #define LC_ENCRYPTION_INFO_64 uint32_t(0x2c)
 270
 271 union Version {
 272     struct {
 273         uint8_t patch;
 274         uint8_t minor;
 275         uint16_t major;
 276     } _packed;
 277
 278     uint32_t value;
 279 };
 280
 281 struct dylib {
 282     uint32_t name;
 283     uint32_t timestamp;
 284     uint32_t current_version;
 285     uint32_t compatibility_version;
 286 } _packed;
 287
 288 struct dylib_command {
 289     uint32_t cmd;
 290     uint32_t cmdsize;
 291     struct dylib dylib;
 292 } _packed;
 293
 294 struct uuid_command {
 295     uint32_t cmd;
 296     uint32_t cmdsize;
 297     uint8_t uuid[16];
 298 } _packed;
 299
 300 struct symtab_command {
 301     uint32_t cmd;
 302     uint32_t cmdsize;
 303     uint32_t symoff;
 304     uint32_t nsyms;
 305     uint32_t stroff;
 306     uint32_t strsize;
 307 } _packed;
 308
 309 struct dyld_info_command {
 310     uint32_t cmd;
 311     uint32_t cmdsize;
 312     uint32_t rebase_off;
 313     uint32_t rebase_size;
 314     uint32_t bind_off;
 315     uint32_t bind_size;
 316     uint32_t weak_bind_off;
 317     uint32_t weak_bind_size;
 318     uint32_t lazy_bind_off;
 319     uint32_t lazy_bind_size;
 320     uint32_t export_off;
 321     uint32_t export_size;
 322 } _packed;
 323
 324 struct dysymtab_command {
 325     uint32_t cmd;
 326     uint32_t cmdsize;
 327     uint32_t ilocalsym;
 328     uint32_t nlocalsym;
 329     uint32_t iextdefsym;
 330     uint32_t nextdefsym;
 331     uint32_t iundefsym;
 332     uint32_t nundefsym;
 333     uint32_t tocoff;
 334     uint32_t ntoc;
 335     uint32_t modtaboff;
 336     uint32_t nmodtab;
 337     uint32_t extrefsymoff;
 338     uint32_t nextrefsyms;
 339     uint32_t indirectsymoff;
 340     uint32_t nindirectsyms;
 341     uint32_t extreloff;
 342     uint32_t nextrel;
 343     uint32_t locreloff;
 344     uint32_t nlocrel;
 345 } _packed;
 346
 347 struct dylib_table_of_contents {
 348     uint32_t symbol_index;
 349     uint32_t module_index;
 350 } _packed;
 351
 352 struct dylib_module {
 353     uint32_t module_name;
 354     uint32_t iextdefsym;
 355     uint32_t nextdefsym;
 356     uint32_t irefsym;
 357     uint32_t nrefsym;
 358     uint32_t ilocalsym;
 359     uint32_t nlocalsym;
 360     uint32_t iextrel;
 361     uint32_t nextrel;
 362     uint32_t iinit_iterm;
 363     uint32_t ninit_nterm;
 364     uint32_t objc_module_info_addr;
 365     uint32_t objc_module_info_size;
 366 } _packed;
 367
 368 struct dylib_reference {
 369     uint32_t isym:24;
 370     uint32_t flags:8;
 371 } _packed;
 372
 373 struct relocation_info {
 374     int32_t r_address;
 375     uint32_t r_symbolnum:24;
 376     uint32_t r_pcrel:1;
 377     uint32_t r_length:2;
 378     uint32_t r_extern:1;
 379     uint32_t r_type:4;
 380 } _packed;
 381
 382 struct nlist {
 383     union {
 384         char *n_name;
 385         int32_t n_strx;
 386     } n_un;
 387
 388     uint8_t n_type;
 389     uint8_t n_sect;
 390     uint8_t n_desc;
 391     uint32_t n_value;
 392 } _packed;
 393
 394 struct segment_command {
 395     uint32_t cmd;
 396     uint32_t cmdsize;
 397     char segname[16];
 398     uint32_t vmaddr;
 399     uint32_t vmsize;
 400     uint32_t fileoff;
 401     uint32_t filesize;
 402     uint32_t maxprot;
 403     uint32_t initprot;
 404     uint32_t nsects;
 405     uint32_t flags;
 406 } _packed;
 407
 408 struct segment_command_64 {
 409     uint32_t cmd;
 410     uint32_t cmdsize;
 411     char segname[16];
 412     uint64_t vmaddr;
 413     uint64_t vmsize;
 414     uint64_t fileoff;
 415     uint64_t filesize;
 416     uint32_t maxprot;
 417     uint32_t initprot;
 418     uint32_t nsects;
 419     uint32_t flags;
 420 } _packed;
 421
 422 struct section {
 423     char sectname[16];
 424     char segname[16];
 425     uint32_t addr;
 426     uint32_t size;
 427     uint32_t offset;
 428     uint32_t align;
 429     uint32_t reloff;
 430     uint32_t nreloc;
 431     uint32_t flags;
 432     uint32_t reserved1;
 433     uint32_t reserved2;
 434 } _packed;
 435
 436 struct section_64 {
 437     char sectname[16];
 438     char segname[16];
 439     uint64_t addr;
 440     uint64_t size;
 441     uint32_t offset;
 442     uint32_t align;
 443     uint32_t reloff;
 444     uint32_t nreloc;
 445     uint32_t flags;
 446     uint32_t reserved1;
 447     uint32_t reserved2;
 448     uint32_t reserved3;
 449 } _packed;
 450
 451 struct linkedit_data_command {
 452     uint32_t cmd;
 453     uint32_t cmdsize;
 454     uint32_t dataoff;
 455     uint32_t datasize;
 456 } _packed;
 457
 458 struct encryption_info_command {
 459     uint32_t cmd;
 460     uint32_t cmdsize;
 461     uint32_t cryptoff;
 462     uint32_t cryptsize;
 463     uint32_t cryptid;
 464 } _packed;
 465
 466 #define BIND_OPCODE_MASK                             0xf0
 467 #define BIND_IMMEDIATE_MASK                          0x0f
 468 #define BIND_OPCODE_DONE                             0x00
 469 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 470 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 471 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 472 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 473 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 474 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 475 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 476 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 477 #define BIND_OPCODE_DO_BIND                          0x90
 478 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 479 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 480 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 481
 482 static auto dummy([](double) {});
 483
 484 static std::streamsize read(std::streambuf &stream, void *data, size_t size) {
 485     auto writ(stream.sgetn(static_cast<char *>(data), size));
 486     _assert(writ >= 0);
 487     return writ;
 488 }
 489
 490 static inline void get(std::streambuf &stream, void *data, size_t size) {
 491     _assert(read(stream, data, size) == size);
 492 }
 493
 494 static inline void put(std::streambuf &stream, const void *data, size_t size) {
 495     _assert(stream.sputn(static_cast<const char *>(data), size) == size);
 496 }
 497
 498 static inline void put(std::streambuf &stream, const void *data, size_t size, const ldid::Functor<void (double)> &percent) {
 499     percent(0);
 500     for (size_t total(0); total != size;) {
 501         auto writ(std::min(size - total, size_t(4096 * 4)));
 502         _assert(stream.sputn(static_cast<const char *>(data) + total, writ) == writ);
 503         total += writ;
 504         percent(double(total) / size);
 505     }
 506 }
 507
 508 static size_t most(std::streambuf &stream, void *data, size_t size) {
 509     size_t total(size);
 510     while (size > 0)
 511         if (auto writ = read(stream, data, size))
 512             size -= writ;
 513         else break;
 514     return total - size;
 515 }
 516
 517 static inline void pad(std::streambuf &stream, size_t size) {
 518     char padding[size];
 519     memset(padding, 0, size);
 520     put(stream, padding, size);
 521 }
 522
 523 template <typename Type_>
 524 Type_ Align(Type_ value, size_t align) {
 525     value += align - 1;
 526     value /= align;
 527     value *= align;
 528     return value;
 529 }
 530
 531 static const uint8_t PageShift_(0x0c);
 532 static const uint32_t PageSize_(1 << PageShift_);
 533
 534 static inline uint16_t Swap_(uint16_t value) {
 535     return
 536         ((value >>  8) & 0x00ff) |
 537         ((value <<  8) & 0xff00);
 538 }
 539
 540 static inline uint32_t Swap_(uint32_t value) {
 541     value = ((value >>  8) & 0x00ff00ff) |
 542             ((value <<  8) & 0xff00ff00);
 543     value = ((value >> 16) & 0x0000ffff) |
 544             ((value << 16) & 0xffff0000);
 545     return value;
 546 }
 547
 548 static inline uint64_t Swap_(uint64_t value) {
 549     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 550     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 551     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 552     return value;
 553 }
 554
 555 static inline int16_t Swap_(int16_t value) {
 556     return Swap_(static_cast<uint16_t>(value));
 557 }
 558
 559 static inline int32_t Swap_(int32_t value) {
 560     return Swap_(static_cast<uint32_t>(value));
 561 }
 562
 563 static inline int64_t Swap_(int64_t value) {
 564     return Swap_(static_cast<uint64_t>(value));
 565 }
 566
 567 static bool little_(true);
 568
 569 static inline uint16_t Swap(uint16_t value) {
 570     return little_ ? Swap_(value) : value;
 571 }
 572
 573 static inline uint32_t Swap(uint32_t value) {
 574     return little_ ? Swap_(value) : value;
 575 }
 576
 577 static inline uint64_t Swap(uint64_t value) {
 578     return little_ ? Swap_(value) : value;
 579 }
 580
 581 static inline int16_t Swap(int16_t value) {
 582     return Swap(static_cast<uint16_t>(value));
 583 }
 584
 585 static inline int32_t Swap(int32_t value) {
 586     return Swap(static_cast<uint32_t>(value));
 587 }
 588
 589 static inline int64_t Swap(int64_t value) {
 590     return Swap(static_cast<uint64_t>(value));
 591 }
 592
 593 class Swapped {
 594   protected:
 595     bool swapped_;
 596
 597     Swapped() :
 598         swapped_(false)
 599     {
 600     }
 601
 602   public:
 603     Swapped(bool swapped) :
 604         swapped_(swapped)
 605     {
 606     }
 607
 608     template <typename Type_>
 609     Type_ Swap(Type_ value) const {
 610         return swapped_ ? Swap_(value) : value;
 611     }
 612 };
 613
 614 class Data :
 615     public Swapped
 616 {
 617   private:
 618     void *base_;
 619     size_t size_;
 620
 621   public:
 622     Data(void *base, size_t size) :
 623         base_(base),
 624         size_(size)
 625     {
 626     }
 627
 628     void *GetBase() const {
 629         return base_;
 630     }
 631
 632     size_t GetSize() const {
 633         return size_;
 634     }
 635 };
 636
 637 class MachHeader :
 638     public Data
 639 {
 640   private:
 641     bool bits64_;
 642
 643     struct mach_header *mach_header_;
 644     struct load_command *load_command_;
 645
 646   public:
 647     MachHeader(void *base, size_t size) :
 648         Data(base, size)
 649     {
 650         mach_header_ = (mach_header *) base;
 651
 652         switch (Swap(mach_header_->magic)) {
 653             case MH_CIGAM:
 654                 swapped_ = !swapped_;
 655             case MH_MAGIC:
 656                 bits64_ = false;
 657             break;
 658
 659             case MH_CIGAM_64:
 660                 swapped_ = !swapped_;
 661             case MH_MAGIC_64:
 662                 bits64_ = true;
 663             break;
 664
 665             default:
 666                 _assert(false);
 667         }
 668
 669         void *post = mach_header_ + 1;
 670         if (bits64_)
 671             post = (uint32_t *) post + 1;
 672         load_command_ = (struct load_command *) post;
 673
 674         _assert(
 675             Swap(mach_header_->filetype) == MH_EXECUTE ||
 676             Swap(mach_header_->filetype) == MH_DYLIB ||
 677             Swap(mach_header_->filetype) == MH_BUNDLE
 678         );
 679     }
 680
 681     bool Bits64() const {
 682         return bits64_;
 683     }
 684
 685     struct mach_header *operator ->() const {
 686         return mach_header_;
 687     }
 688
 689     operator struct mach_header *() const {
 690         return mach_header_;
 691     }
 692
 693     uint32_t GetCPUType() const {
 694         return Swap(mach_header_->cputype);
 695     }
 696
 697     uint32_t GetCPUSubtype() const {
 698         return Swap(mach_header_->cpusubtype) & 0xff;
 699     }
 700
 701     struct load_command *GetLoadCommand() const {
 702         return load_command_;
 703     }
 704
 705     std::vector<struct load_command *> GetLoadCommands() const {
 706         std::vector<struct load_command *> load_commands;
 707
 708         struct load_command *load_command = load_command_;
 709         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 710             load_commands.push_back(load_command);
 711             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 712         }
 713
 714         return load_commands;
 715     }
 716
 717     void ForSection(const ldid::Functor<void (const char *, const char *, void *, size_t)> &code) const {
 718         _foreach (load_command, GetLoadCommands())
 719             switch (Swap(load_command->cmd)) {
 720                 case LC_SEGMENT: {
 721                     auto segment(reinterpret_cast<struct segment_command *>(load_command));
 722                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 723                     auto section(reinterpret_cast<struct section *>(segment + 1));
 724                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 725                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 726                 } break;
 727
 728                 case LC_SEGMENT_64: {
 729                     auto segment(reinterpret_cast<struct segment_command_64 *>(load_command));
 730                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 731                     auto section(reinterpret_cast<struct section_64 *>(segment + 1));
 732                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 733                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 734                 } break;
 735             }
 736     }
 737
 738     template <typename Target_>
 739     Target_ *GetOffset(uint32_t offset) const {
 740         return reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_);
 741     }
 742 };
 743
 744 class FatMachHeader :
 745     public MachHeader
 746 {
 747   private:
 748     fat_arch *fat_arch_;
 749
 750   public:
 751     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 752         MachHeader(base, size),
 753         fat_arch_(fat_arch)
 754     {
 755     }
 756
 757     fat_arch *GetFatArch() const {
 758         return fat_arch_;
 759     }
 760 };
 761
 762 class FatHeader :
 763     public Data
 764 {
 765   private:
 766     fat_header *fat_header_;
 767     std::vector<FatMachHeader> mach_headers_;
 768
 769   public:
 770     FatHeader(void *base, size_t size) :
 771         Data(base, size)
 772     {
 773         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 774
 775         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 776             swapped_ = !swapped_;
 777             goto fat;
 778         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 779             fat_header_ = NULL;
 780             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 781         } else fat: {
 782             size_t fat_narch = Swap(fat_header_->nfat_arch);
 783             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 784             size_t arch;
 785             for (arch = 0; arch != fat_narch; ++arch) {
 786                 uint32_t arch_offset = Swap(fat_arch->offset);
 787                 uint32_t arch_size = Swap(fat_arch->size);
 788                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 789                 ++fat_arch;
 790             }
 791         }
 792     }
 793
 794     std::vector<FatMachHeader> &GetMachHeaders() {
 795         return mach_headers_;
 796     }
 797
 798     bool IsFat() const {
 799         return fat_header_ != NULL;
 800     }
 801
 802     struct fat_header *operator ->() const {
 803         return fat_header_;
 804     }
 805
 806     operator struct fat_header *() const {
 807         return fat_header_;
 808     }
 809 };
 810
 811 #define CSMAGIC_REQUIREMENT            uint32_t(0xfade0c00)
 812 #define CSMAGIC_REQUIREMENTS           uint32_t(0xfade0c01)
 813 #define CSMAGIC_CODEDIRECTORY          uint32_t(0xfade0c02)
 814 #define CSMAGIC_EMBEDDED_SIGNATURE     uint32_t(0xfade0cc0)
 815 #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02)
 816 #define CSMAGIC_EMBEDDED_ENTITLEMENTS  uint32_t(0xfade7171)
 817 #define CSMAGIC_DETACHED_SIGNATURE     uint32_t(0xfade0cc1)
 818 #define CSMAGIC_BLOBWRAPPER            uint32_t(0xfade0b01)
 819
 820 #define CSSLOT_CODEDIRECTORY uint32_t(0x00000)
 821 #define CSSLOT_INFOSLOT      uint32_t(0x00001)
 822 #define CSSLOT_REQUIREMENTS  uint32_t(0x00002)
 823 #define CSSLOT_RESOURCEDIR   uint32_t(0x00003)
 824 #define CSSLOT_APPLICATION   uint32_t(0x00004)
 825 #define CSSLOT_ENTITLEMENTS  uint32_t(0x00005)
 826 #define CSSLOT_ALTERNATE     uint32_t(0x01000)
 827
 828 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 829
 830 #define CS_HASHTYPE_SHA160_160 1
 831 #define CS_HASHTYPE_SHA256_256 2
 832 #define CS_HASHTYPE_SHA256_160 3
 833 #define CS_HASHTYPE_SHA386_386 4
 834
 835 struct BlobIndex {
 836     uint32_t type;
 837     uint32_t offset;
 838 } _packed;
 839
 840 struct Blob {
 841     uint32_t magic;
 842     uint32_t length;
 843 } _packed;
 844
 845 struct SuperBlob {
 846     struct Blob blob;
 847     uint32_t count;
 848     struct BlobIndex index[];
 849 } _packed;
 850
 851 struct CodeDirectory {
 852     uint32_t version;
 853     uint32_t flags;
 854     uint32_t hashOffset;
 855     uint32_t identOffset;
 856     uint32_t nSpecialSlots;
 857     uint32_t nCodeSlots;
 858     uint32_t codeLimit;
 859     uint8_t hashSize;
 860     uint8_t hashType;
 861     uint8_t spare1;
 862     uint8_t pageSize;
 863     uint32_t spare2;
 864     uint32_t scatterOffset;
 865     uint32_t teamIDOffset;
 866     //uint32_t spare3;
 867     //uint64_t codeLimit64;
 868 } _packed;
 869
 870 enum Kind : uint32_t {
 871     exprForm = 1, // prefix expr form
 872 };
 873
 874 enum ExprOp : uint32_t {
 875     opFalse, // unconditionally false
 876     opTrue, // unconditionally true
 877     opIdent, // match canonical code [string]
 878     opAppleAnchor, // signed by Apple as Apple's product
 879     opAnchorHash, // match anchor [cert hash]
 880     opInfoKeyValue, // *legacy* - use opInfoKeyField [key; value]
 881     opAnd, // binary prefix expr AND expr [expr; expr]
 882     opOr, // binary prefix expr OR expr [expr; expr]
 883     opCDHash, // match hash of CodeDirectory directly [cd hash]
 884     opNot, // logical inverse [expr]
 885     opInfoKeyField, // Info.plist key field [string; match suffix]
 886     opCertField, // Certificate field [cert index; field name; match suffix]
 887     opTrustedCert, // require trust settings to approve one particular cert [cert index]
 888     opTrustedCerts, // require trust settings to approve the cert chain
 889     opCertGeneric, // Certificate component by OID [cert index; oid; match suffix]
 890     opAppleGenericAnchor, // signed by Apple in any capacity
 891     opEntitlementField, // entitlement dictionary field [string; match suffix]
 892     opCertPolicy, // Certificate policy by OID [cert index; oid; match suffix]
 893     opNamedAnchor, // named anchor type
 894     opNamedCode, // named subroutine
 895     opPlatform, // platform constraint [integer]
 896     exprOpCount // (total opcode count in use)
 897 };
 898
 899 enum MatchOperation {
 900     matchExists, // anything but explicit "false" - no value stored
 901     matchEqual, // equal (CFEqual)
 902     matchContains, // partial match (substring)
 903     matchBeginsWith, // partial match (initial substring)
 904     matchEndsWith, // partial match (terminal substring)
 905     matchLessThan, // less than (string with numeric comparison)
 906     matchGreaterThan, // greater than (string with numeric comparison)
 907     matchLessEqual, // less or equal (string with numeric comparison)
 908     matchGreaterEqual, // greater or equal (string with numeric comparison)
 909 };
 910
 911 #define OID_ISO_MEMBER 42
 912 #define OID_US OID_ISO_MEMBER, 134, 72
 913 #define APPLE_OID OID_US, 0x86, 0xf7, 0x63
 914 #define APPLE_ADS_OID APPLE_OID, 0x64
 915 #define APPLE_EXTENSION_OID APPLE_ADS_OID, 6
 916
 917 #ifndef LDID_NOFLAGT
 918 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 919 #endif
 920
 921 struct Algorithm {
 922     size_t size_;
 923     uint8_t type_;
 924
 925     Algorithm(size_t size, uint8_t type) :
 926         size_(size),
 927         type_(type)
 928     {
 929     }
 930
 931     virtual const uint8_t *operator [](const ldid::Hash &hash) const = 0;
 932
 933     virtual void operator ()(uint8_t *hash, const void *data, size_t size) const = 0;
 934     virtual void operator ()(ldid::Hash &hash, const void *data, size_t size) const = 0;
 935     virtual void operator ()(std::vector<char> &hash, const void *data, size_t size) const = 0;
 936 };
 937
 938 struct AlgorithmSHA1 :
 939     Algorithm
 940 {
 941     AlgorithmSHA1() :
 942         Algorithm(LDID_SHA1_DIGEST_LENGTH, CS_HASHTYPE_SHA160_160)
 943     {
 944     }
 945
 946     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
 947         return hash.sha1_;
 948     }
 949
 950     void operator ()(uint8_t *hash, const void *data, size_t size) const {
 951         LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 952     }
 953
 954     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
 955         return operator()(hash.sha1_, data, size);
 956     }
 957
 958     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
 959         hash.resize(LDID_SHA1_DIGEST_LENGTH);
 960         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 961     }
 962 };
 963
 964 struct AlgorithmSHA256 :
 965     Algorithm
 966 {
 967     AlgorithmSHA256() :
 968         Algorithm(LDID_SHA256_DIGEST_LENGTH, CS_HASHTYPE_SHA256_256)
 969     {
 970     }
 971
 972     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
 973         return hash.sha256_;
 974     }
 975
 976     void operator ()(uint8_t *hash, const void *data, size_t size) const {
 977         LDID_SHA256(static_cast<const uint8_t *>(data), size, hash);
 978     }
 979
 980     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
 981         return operator()(hash.sha256_, data, size);
 982     }
 983
 984     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
 985         hash.resize(LDID_SHA256_DIGEST_LENGTH);
 986         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 987     }
 988 };
 989
 990 static const std::vector<Algorithm *> &GetAlgorithms() {
 991     static AlgorithmSHA1 sha1;
 992     static AlgorithmSHA256 sha256;
 993
 994     static Algorithm *array[] = {
 995         &sha1,
 996         &sha256,
 997     };
 998
 999     static std::vector<Algorithm *> algorithms(array, array + sizeof(array) / sizeof(array[0]));
1000     return algorithms;
1001 }
1002
1003 struct CodesignAllocation {
1004     FatMachHeader mach_header_;
1005     uint32_t offset_;
1006     uint32_t size_;
1007     uint32_t limit_;
1008     uint32_t alloc_;
1009     uint32_t align_;
1010
1011     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
1012         mach_header_(mach_header),
1013         offset_(offset),
1014         size_(size),
1015         limit_(limit),
1016         alloc_(alloc),
1017         align_(align)
1018     {
1019     }
1020 };
1021
1022 #ifndef LDID_NOTOOLS
1023 class File {
1024   private:
1025     int file_;
1026
1027   public:
1028     File() :
1029         file_(-1)
1030     {
1031     }
1032
1033     ~File() {
1034         if (file_ != -1)
1035             _syscall(close(file_));
1036     }
1037
1038     void open(const char *path, int flags) {
1039         _assert(file_ == -1);
1040         file_ = _syscall(::open(path, flags));
1041     }
1042
1043     int file() const {
1044         return file_;
1045     }
1046 };
1047
1048 class Map {
1049   private:
1050     File file_;
1051     void *data_;
1052     size_t size_;
1053
1054     void clear() {
1055         if (data_ == NULL)
1056             return;
1057         _syscall(munmap(data_, size_));
1058         data_ = NULL;
1059         size_ = 0;
1060     }
1061
1062   public:
1063     Map() :
1064         data_(NULL),
1065         size_(0)
1066     {
1067     }
1068
1069     Map(const std::string &path, int oflag, int pflag, int mflag) :
1070         Map()
1071     {
1072         open(path, oflag, pflag, mflag);
1073     }
1074
1075     Map(const std::string &path, bool edit) :
1076         Map()
1077     {
1078         open(path, edit);
1079     }
1080
1081     ~Map() {
1082         clear();
1083     }
1084
1085     bool empty() const {
1086         return data_ == NULL;
1087     }
1088
1089     void open(const std::string &path, int oflag, int pflag, int mflag) {
1090         clear();
1091
1092         file_.open(path.c_str(), oflag);
1093         int file(file_.file());
1094
1095         struct stat stat;
1096         _syscall(fstat(file, &stat));
1097         size_ = stat.st_size;
1098
1099         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
1100     }
1101
1102     void open(const std::string &path, bool edit) {
1103         if (edit)
1104             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
1105         else
1106             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
1107     }
1108
1109     void *data() const {
1110         return data_;
1111     }
1112
1113     size_t size() const {
1114         return size_;
1115     }
1116
1117     operator std::string() const {
1118         return std::string(static_cast<char *>(data_), size_);
1119     }
1120 };
1121 #endif
1122
1123 namespace ldid {
1124
1125 std::string Analyze(const void *data, size_t size) {
1126     std::string entitlements;
1127
1128     FatHeader fat_header(const_cast<void *>(data), size);
1129     _foreach (mach_header, fat_header.GetMachHeaders())
1130         _foreach (load_command, mach_header.GetLoadCommands())
1131             if (mach_header.Swap(load_command->cmd) == LC_CODE_SIGNATURE) {
1132                 auto signature(reinterpret_cast<struct linkedit_data_command *>(load_command));
1133                 auto offset(mach_header.Swap(signature->dataoff));
1134                 auto pointer(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + offset);
1135                 auto super(reinterpret_cast<struct SuperBlob *>(pointer));
1136
1137                 for (size_t index(0); index != Swap(super->count); ++index)
1138                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
1139                         auto begin(Swap(super->index[index].offset));
1140                         auto blob(reinterpret_cast<struct Blob *>(pointer + begin));
1141                         auto writ(Swap(blob->length) - sizeof(*blob));
1142
1143                         if (entitlements.empty())
1144                             entitlements.assign(reinterpret_cast<char *>(blob + 1), writ);
1145                         else
1146                             _assert(entitlements.compare(0, entitlements.size(), reinterpret_cast<char *>(blob + 1), writ) == 0);
1147                     }
1148             }
1149
1150     return entitlements;
1151 }
1152
1153 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) {
1154     FatHeader source(const_cast<void *>(idata), isize);
1155
1156     size_t offset(0);
1157     if (source.IsFat())
1158         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
1159
1160     std::vector<CodesignAllocation> allocations;
1161     _foreach (mach_header, source.GetMachHeaders()) {
1162         struct linkedit_data_command *signature(NULL);
1163         struct symtab_command *symtab(NULL);
1164
1165         _foreach (load_command, mach_header.GetLoadCommands()) {
1166             uint32_t cmd(mach_header.Swap(load_command->cmd));
1167             if (false);
1168             else if (cmd == LC_CODE_SIGNATURE)
1169                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1170             else if (cmd == LC_SYMTAB)
1171                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
1172         }
1173
1174         size_t size;
1175         if (signature == NULL)
1176             size = mach_header.GetSize();
1177         else {
1178             size = mach_header.Swap(signature->dataoff);
1179             _assert(size <= mach_header.GetSize());
1180         }
1181
1182         if (symtab != NULL) {
1183             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
1184             _assert(end <= size);
1185             _assert(end >= size - 0x10);
1186             size = end;
1187         }
1188
1189         size_t alloc(allocate(mach_header, size));
1190
1191         auto *fat_arch(mach_header.GetFatArch());
1192         uint32_t align;
1193
1194         if (fat_arch != NULL)
1195             align = source.Swap(fat_arch->align);
1196         else switch (mach_header.GetCPUType()) {
1197             case CPU_TYPE_POWERPC:
1198             case CPU_TYPE_POWERPC64:
1199             case CPU_TYPE_X86:
1200             case CPU_TYPE_X86_64:
1201                 align = 0xc;
1202                 break;
1203             case CPU_TYPE_ARM:
1204             case CPU_TYPE_ARM64:
1205                 align = 0xe;
1206                 break;
1207             default:
1208                 align = 0x0;
1209                 break;
1210         }
1211
1212         offset = Align(offset, 1 << align);
1213
1214         uint32_t limit(size);
1215         if (alloc != 0)
1216             limit = Align(limit, 0x10);
1217
1218         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
1219         offset += size + alloc;
1220         offset = Align(offset, 0x10);
1221     }
1222
1223     size_t position(0);
1224
1225     if (source.IsFat()) {
1226         fat_header fat_header;
1227         fat_header.magic = Swap(FAT_MAGIC);
1228         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1229         put(output, &fat_header, sizeof(fat_header));
1230         position += sizeof(fat_header);
1231
1232         _foreach (allocation, allocations) {
1233             auto &mach_header(allocation.mach_header_);
1234
1235             fat_arch fat_arch;
1236             fat_arch.cputype = Swap(mach_header->cputype);
1237             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1238             fat_arch.offset = Swap(allocation.offset_);
1239             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1240             fat_arch.align = Swap(allocation.align_);
1241             put(output, &fat_arch, sizeof(fat_arch));
1242             position += sizeof(fat_arch);
1243         }
1244     }
1245
1246     _foreach (allocation, allocations) {
1247         auto &mach_header(allocation.mach_header_);
1248
1249         pad(output, allocation.offset_ - position);
1250         position = allocation.offset_;
1251
1252         std::vector<std::string> commands;
1253
1254         _foreach (load_command, mach_header.GetLoadCommands()) {
1255             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1256
1257             switch (mach_header.Swap(load_command->cmd)) {
1258                 case LC_CODE_SIGNATURE:
1259                     continue;
1260                 break;
1261
1262                 case LC_SEGMENT: {
1263                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1264                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1265                         break;
1266                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1267                     segment_command->filesize = size;
1268                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1269                 } break;
1270
1271                 case LC_SEGMENT_64: {
1272                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1273                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1274                         break;
1275                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1276                     segment_command->filesize = size;
1277                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1278                 } break;
1279             }
1280
1281             commands.push_back(copy);
1282         }
1283
1284         if (allocation.alloc_ != 0) {
1285             linkedit_data_command signature;
1286             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1287             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1288             signature.dataoff = mach_header.Swap(allocation.limit_);
1289             signature.datasize = mach_header.Swap(allocation.alloc_);
1290             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1291         }
1292
1293         size_t begin(position);
1294
1295         uint32_t after(0);
1296         _foreach(command, commands)
1297             after += command.size();
1298
1299         std::stringbuf altern;
1300
1301         struct mach_header header(*mach_header);
1302         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1303         header.sizeofcmds = mach_header.Swap(after);
1304         put(output, &header, sizeof(header));
1305         put(altern, &header, sizeof(header));
1306         position += sizeof(header);
1307
1308         if (mach_header.Bits64()) {
1309             auto pad(mach_header.Swap(uint32_t(0)));
1310             put(output, &pad, sizeof(pad));
1311             put(altern, &pad, sizeof(pad));
1312             position += sizeof(pad);
1313         }
1314
1315         _foreach(command, commands) {
1316             put(output, command.data(), command.size());
1317             put(altern, command.data(), command.size());
1318             position += command.size();
1319         }
1320
1321         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1322         if (before > after) {
1323             pad(output, before - after);
1324             pad(altern, before - after);
1325             position += before - after;
1326         }
1327
1328         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1329
1330         std::string overlap(altern.str());
1331         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1332
1333         put(output, top + (position - begin), allocation.size_ - (position - begin), percent);
1334         position = begin + allocation.size_;
1335
1336         pad(output, allocation.limit_ - allocation.size_);
1337         position += allocation.limit_ - allocation.size_;
1338
1339         size_t saved(save(mach_header, output, allocation.limit_, overlap, top, percent));
1340         if (allocation.alloc_ > saved)
1341             pad(output, allocation.alloc_ - saved);
1342         else
1343             _assert(allocation.alloc_ == saved);
1344         position += allocation.alloc_;
1345     }
1346 }
1347
1348 }
1349
1350 typedef std::map<uint32_t, std::string> Blobs;
1351
1352 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1353     auto value(buffer.str());
1354     std::swap(blobs[slot], value);
1355 }
1356
1357 static const std::string &insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1358     auto value(buffer.str());
1359     Blob blob;
1360     blob.magic = Swap(magic);
1361     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1362     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1363     auto &save(blobs[slot]);
1364     std::swap(save, value);
1365     return save;
1366 }
1367
1368 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1369     size_t total(0);
1370     _foreach (blob, blobs)
1371         total += blob.second.size();
1372
1373     struct SuperBlob super;
1374     super.blob.magic = Swap(magic);
1375     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1376     super.count = Swap(uint32_t(blobs.size()));
1377     put(output, &super, sizeof(super));
1378
1379     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1380
1381     _foreach (blob, blobs) {
1382         BlobIndex index;
1383         index.type = Swap(blob.first);
1384         index.offset = Swap(uint32_t(offset));
1385         put(output, &index, sizeof(index));
1386         offset += blob.second.size();
1387     }
1388
1389     _foreach (blob, blobs)
1390         put(output, blob.second.data(), blob.second.size());
1391
1392     return offset;
1393 }
1394
1395 #ifndef LDID_NOSMIME
1396 class Buffer {
1397   private:
1398     BIO *bio_;
1399
1400   public:
1401     Buffer(BIO *bio) :
1402         bio_(bio)
1403     {
1404         _assert(bio_ != NULL);
1405     }
1406
1407     Buffer() :
1408         bio_(BIO_new(BIO_s_mem()))
1409     {
1410     }
1411
1412     Buffer(const char *data, size_t size) :
1413         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1414     {
1415     }
1416
1417     Buffer(const std::string &data) :
1418         Buffer(data.data(), data.size())
1419     {
1420     }
1421
1422     Buffer(PKCS7 *pkcs) :
1423         Buffer()
1424     {
1425         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1426     }
1427
1428     ~Buffer() {
1429         BIO_free_all(bio_);
1430     }
1431
1432     operator BIO *() const {
1433         return bio_;
1434     }
1435
1436     explicit operator std::string() const {
1437         char *data;
1438         auto size(BIO_get_mem_data(bio_, &data));
1439         return std::string(data, size);
1440     }
1441 };
1442
1443 class Stuff {
1444   private:
1445     PKCS12 *value_;
1446     EVP_PKEY *key_;
1447     X509 *cert_;
1448     STACK_OF(X509) *ca_;
1449
1450   public:
1451     Stuff(BIO *bio) :
1452         value_(d2i_PKCS12_bio(bio, NULL)),
1453         ca_(NULL)
1454     {
1455         _assert(value_ != NULL);
1456         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1457
1458         _assert(key_ != NULL);
1459         _assert(cert_ != NULL);
1460
1461         if (ca_ == NULL)
1462             ca_ = sk_X509_new_null();
1463         _assert(ca_ != NULL);
1464     }
1465
1466     Stuff(const std::string &data) :
1467         Stuff(Buffer(data))
1468     {
1469     }
1470
1471     ~Stuff() {
1472         sk_X509_pop_free(ca_, X509_free);
1473         X509_free(cert_);
1474         EVP_PKEY_free(key_);
1475         PKCS12_free(value_);
1476     }
1477
1478     operator PKCS12 *() const {
1479         return value_;
1480     }
1481
1482     operator EVP_PKEY *() const {
1483         return key_;
1484     }
1485
1486     operator X509 *() const {
1487         return cert_;
1488     }
1489
1490     operator STACK_OF(X509) *() const {
1491         return ca_;
1492     }
1493 };
1494
1495 class Signature {
1496   private:
1497     PKCS7 *value_;
1498
1499   public:
1500     Signature(const Stuff &stuff, const Buffer &data, const std::string &xml) {
1501         value_ = PKCS7_new();
1502         _assert(value_ != NULL);
1503
1504         _assert(PKCS7_set_type(value_, NID_pkcs7_signed));
1505         _assert(PKCS7_content_new(value_, NID_pkcs7_data));
1506
1507         STACK_OF(X509) *certs(stuff);
1508         for (unsigned i(0), e(sk_X509_num(certs)); i != e; i++)
1509             _assert(PKCS7_add_certificate(value_, sk_X509_value(certs, e - i - 1)));
1510
1511         auto info(PKCS7_sign_add_signer(value_, stuff, stuff, NULL, PKCS7_NOSMIMECAP));
1512         _assert(info != NULL);
1513
1514         PKCS7_set_detached(value_, 1);
1515
1516         ASN1_OCTET_STRING *string(ASN1_OCTET_STRING_new());
1517         _assert(string != NULL);
1518         try {
1519             _assert(ASN1_STRING_set(string, xml.data(), xml.size()));
1520
1521             static auto nid(OBJ_create("1.2.840.113635.100.9.1", "", ""));
1522             _assert(PKCS7_add_signed_attribute(info, nid, V_ASN1_OCTET_STRING, string));
1523         } catch (...) {
1524             ASN1_OCTET_STRING_free(string);
1525             throw;
1526         }
1527
1528         _assert(PKCS7_final(value_, data, PKCS7_BINARY));
1529     }
1530
1531     ~Signature() {
1532         PKCS7_free(value_);
1533     }
1534
1535     operator PKCS7 *() const {
1536         return value_;
1537     }
1538 };
1539 #endif
1540
1541 class NullBuffer :
1542     public std::streambuf
1543 {
1544   public:
1545     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1546         return size;
1547     }
1548
1549     virtual int_type overflow(int_type next) {
1550         return next;
1551     }
1552 };
1553
1554 class Digest {
1555   public:
1556     uint8_t sha1_[LDID_SHA1_DIGEST_LENGTH];
1557 };
1558
1559 class HashBuffer :
1560     public std::streambuf
1561 {
1562   private:
1563     ldid::Hash &hash_;
1564
1565     LDID_SHA1_CTX sha1_;
1566     LDID_SHA256_CTX sha256_;
1567
1568   public:
1569     HashBuffer(ldid::Hash &hash) :
1570         hash_(hash)
1571     {
1572         LDID_SHA1_Init(&sha1_);
1573         LDID_SHA256_Init(&sha256_);
1574     }
1575
1576     ~HashBuffer() {
1577         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.sha1_), &sha1_);
1578         LDID_SHA256_Final(reinterpret_cast<uint8_t *>(hash_.sha256_), &sha256_);
1579     }
1580
1581     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1582         LDID_SHA1_Update(&sha1_, data, size);
1583         LDID_SHA256_Update(&sha256_, data, size);
1584         return size;
1585     }
1586
1587     virtual int_type overflow(int_type next) {
1588         if (next == traits_type::eof())
1589             return sync();
1590         char value(next);
1591         xsputn(&value, 1);
1592         return next;
1593     }
1594 };
1595
1596 class HashProxy :
1597     public HashBuffer
1598 {
1599   private:
1600     std::streambuf &buffer_;
1601
1602   public:
1603     HashProxy(ldid::Hash &hash, std::streambuf &buffer) :
1604         HashBuffer(hash),
1605         buffer_(buffer)
1606     {
1607     }
1608
1609     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1610         _assert(HashBuffer::xsputn(data, size) == size);
1611         return buffer_.sputn(data, size);
1612     }
1613 };
1614
1615 #ifndef LDID_NOTOOLS
1616 static bool Starts(const std::string &lhs, const std::string &rhs) {
1617     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1618 }
1619
1620 class Split {
1621   public:
1622     std::string dir;
1623     std::string base;
1624
1625     Split(const std::string &path) {
1626         size_t slash(path.rfind('/'));
1627         if (slash == std::string::npos)
1628             base = path;
1629         else {
1630             dir = path.substr(0, slash + 1);
1631             base = path.substr(slash + 1);
1632         }
1633     }
1634 };
1635
1636 static void mkdir_p(const std::string &path) {
1637     if (path.empty())
1638         return;
1639 #ifdef __WIN32__
1640     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1641         return;
1642 #else
1643     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1644         return;
1645 #endif
1646     auto slash(path.rfind('/', path.size() - 1));
1647     if (slash == std::string::npos)
1648         return;
1649     mkdir_p(path.substr(0, slash));
1650 }
1651
1652 static std::string Temporary(std::filebuf &file, const Split &split) {
1653     std::string temp(split.dir + ".ldid." + split.base);
1654     mkdir_p(split.dir);
1655     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1656     return temp;
1657 }
1658
1659 static void Commit(const std::string &path, const std::string &temp) {
1660     struct stat info;
1661     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1662 #ifndef __WIN32__
1663         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1664 #endif
1665         _syscall(chmod(temp.c_str(), info.st_mode));
1666     }
1667
1668     _syscall(rename(temp.c_str(), path.c_str()));
1669 }
1670 #endif
1671
1672 namespace ldid {
1673
1674 static void get(std::string &value, X509_NAME *name, int nid) {
1675     auto index(X509_NAME_get_index_by_NID(name, nid, -1));
1676     _assert(index >= 0);
1677     auto next(X509_NAME_get_index_by_NID(name, nid, index));
1678     _assert(next == -1);
1679     auto entry(X509_NAME_get_entry(name, index));
1680     _assert(entry != NULL);
1681     auto asn(X509_NAME_ENTRY_get_data(entry));
1682     _assert(asn != NULL);
1683     value.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1684 }
1685
1686 static void req(std::streambuf &buffer, uint32_t value) {
1687     value = Swap(value);
1688     put(buffer, &value, sizeof(value));
1689 }
1690
1691 static void req(std::streambuf &buffer, const std::string &value) {
1692     req(buffer, value.size());
1693     put(buffer, value.data(), value.size());
1694     static uint8_t zeros[] = {0,0,0,0};
1695     put(buffer, zeros, 3 - (value.size() + 3) % 4);
1696 }
1697
1698 template <size_t Size_>
1699 static void req(std::streambuf &buffer, uint8_t (&&data)[Size_]) {
1700     req(buffer, Size_);
1701     put(buffer, data, Size_);
1702     static uint8_t zeros[] = {0,0,0,0};
1703     put(buffer, zeros, 3 - (Size_ + 3) % 4);
1704 }
1705
1706 Hash Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &requirements, const std::string &key, const Slots &slots, const Functor<void (double)> &percent) {
1707     Hash hash;
1708
1709
1710     std::string team;
1711     std::string common;
1712
1713 #ifndef LDID_NOSMIME
1714     if (!key.empty()) {
1715         Stuff stuff(key);
1716         auto name(X509_get_subject_name(stuff));
1717         _assert(name != NULL);
1718         get(team, name, NID_organizationalUnitName);
1719         get(common, name, NID_commonName);
1720     }
1721 #endif
1722
1723
1724     std::stringbuf backing;
1725
1726     if (!requirements.empty()) {
1727         put(backing, requirements.data(), requirements.size());
1728     } else {
1729         Blobs blobs;
1730
1731         std::stringbuf requirement;
1732         req(requirement, exprForm);
1733         req(requirement, opAnd);
1734         req(requirement, opIdent);
1735         req(requirement, identifier);
1736         req(requirement, opAnd);
1737         req(requirement, opAppleGenericAnchor);
1738         req(requirement, opAnd);
1739         req(requirement, opCertField);
1740         req(requirement, 0);
1741         req(requirement, "subject.CN");
1742         req(requirement, matchEqual);
1743         req(requirement, common);
1744         req(requirement, opCertGeneric);
1745         req(requirement, 1);
1746         req(requirement, (uint8_t []) {APPLE_EXTENSION_OID, 2, 1});
1747         req(requirement, matchExists);
1748         insert(blobs, 3, CSMAGIC_REQUIREMENT, requirement);
1749
1750         put(backing, CSMAGIC_REQUIREMENTS, blobs);
1751     }
1752
1753
1754     // XXX: this is just a "sufficiently large number"
1755     size_t certificate(0x3000);
1756
1757     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1758         size_t alloc(sizeof(struct SuperBlob));
1759
1760         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1761
1762         uint32_t special(0);
1763
1764         _foreach (slot, slots)
1765             special = std::max(special, slot.first);
1766
1767         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1768             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1769                 special = std::max(special, CSSLOT_INFOSLOT);
1770         }));
1771
1772         special = std::max(special, CSSLOT_REQUIREMENTS);
1773         alloc += sizeof(struct BlobIndex);
1774         alloc += backing.str().size();
1775
1776         if (!entitlements.empty()) {
1777             special = std::max(special, CSSLOT_ENTITLEMENTS);
1778             alloc += sizeof(struct BlobIndex);
1779             alloc += sizeof(struct Blob);
1780             alloc += entitlements.size();
1781         }
1782
1783         size_t directory(0);
1784
1785         directory += sizeof(struct BlobIndex);
1786         directory += sizeof(struct Blob);
1787         directory += sizeof(struct CodeDirectory);
1788         directory += identifier.size() + 1;
1789
1790         if (!team.empty())
1791             directory += team.size() + 1;
1792
1793         for (Algorithm *algorithm : GetAlgorithms())
1794             alloc = Align(alloc + directory + (special + normal) * algorithm->size_, 16);
1795
1796 #ifndef LDID_NOSMIME
1797         if (!key.empty()) {
1798             alloc += sizeof(struct BlobIndex);
1799             alloc += sizeof(struct Blob);
1800             alloc += certificate;
1801         }
1802 #endif
1803
1804         return alloc;
1805     }), 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 {
1806         Blobs blobs;
1807
1808         if (true) {
1809             insert(blobs, CSSLOT_REQUIREMENTS, backing);
1810         }
1811
1812         if (!entitlements.empty()) {
1813             std::stringbuf data;
1814             put(data, entitlements.data(), entitlements.size());
1815             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1816         }
1817
1818         Slots posts(slots);
1819
1820         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1821             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0) {
1822                 auto &slot(posts[CSSLOT_INFOSLOT]);
1823                 for (Algorithm *algorithm : GetAlgorithms())
1824                     (*algorithm)(slot, data, size);
1825             }
1826         }));
1827
1828         unsigned total(0);
1829         for (Algorithm *pointer : GetAlgorithms()) {
1830             Algorithm &algorithm(*pointer);
1831
1832             std::stringbuf data;
1833
1834             uint32_t special(0);
1835             _foreach (blob, blobs)
1836                 special = std::max(special, blob.first);
1837             _foreach (slot, posts)
1838                 special = std::max(special, slot.first);
1839             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1840
1841             CodeDirectory directory;
1842             directory.version = Swap(uint32_t(0x00020200));
1843             directory.flags = Swap(uint32_t(0));
1844             directory.nSpecialSlots = Swap(special);
1845             directory.codeLimit = Swap(uint32_t(limit));
1846             directory.nCodeSlots = Swap(normal);
1847             directory.hashSize = algorithm.size_;
1848             directory.hashType = algorithm.type_;
1849             directory.spare1 = 0x00;
1850             directory.pageSize = PageShift_;
1851             directory.spare2 = Swap(uint32_t(0));
1852             directory.scatterOffset = Swap(uint32_t(0));
1853             //directory.spare3 = Swap(uint32_t(0));
1854             //directory.codeLimit64 = Swap(uint64_t(0));
1855
1856             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1857
1858             directory.identOffset = Swap(uint32_t(offset));
1859             offset += identifier.size() + 1;
1860
1861             if (team.empty())
1862                 directory.teamIDOffset = Swap(uint32_t(0));
1863             else {
1864                 directory.teamIDOffset = Swap(uint32_t(offset));
1865                 offset += team.size() + 1;
1866             }
1867
1868             offset += special * algorithm.size_;
1869             directory.hashOffset = Swap(uint32_t(offset));
1870             offset += normal * algorithm.size_;
1871
1872             put(data, &directory, sizeof(directory));
1873
1874             put(data, identifier.c_str(), identifier.size() + 1);
1875             if (!team.empty())
1876                 put(data, team.c_str(), team.size() + 1);
1877
1878             std::vector<uint8_t> storage((special + normal) * algorithm.size_);
1879             auto *hashes(&storage[special * algorithm.size_]);
1880
1881             memset(storage.data(), 0, special * algorithm.size_);
1882
1883             _foreach (blob, blobs) {
1884                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1885                 algorithm(hashes - blob.first * algorithm.size_, local, Swap(local->length));
1886             }
1887
1888             _foreach (slot, posts)
1889                 memcpy(hashes - slot.first * algorithm.size_, algorithm[slot.second], algorithm.size_);
1890
1891             percent(0);
1892             if (normal != 1)
1893                 for (size_t i = 0; i != normal - 1; ++i) {
1894                     algorithm(hashes + i * algorithm.size_, (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1895                     percent(double(i) / normal);
1896                 }
1897             if (normal != 0)
1898                 algorithm(hashes + (normal - 1) * algorithm.size_, top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1899             percent(1);
1900
1901             put(data, storage.data(), storage.size());
1902
1903             const auto &save(insert(blobs, total == 0 ? CSSLOT_CODEDIRECTORY : CSSLOT_ALTERNATE + total - 1, CSMAGIC_CODEDIRECTORY, data));
1904             algorithm(hash, save.data(), save.size());
1905
1906             ++total;
1907         }
1908
1909 #ifndef LDID_NOSMIME
1910         if (!key.empty()) {
1911             auto plist(plist_new_dict());
1912             _scope({ plist_free(plist); });
1913
1914             auto cdhashes(plist_new_array());
1915             plist_dict_set_item(plist, "cdhashes", cdhashes);
1916
1917             unsigned total(0);
1918             for (Algorithm *pointer : GetAlgorithms()) {
1919                 Algorithm &algorithm(*pointer);
1920                 (void) algorithm;
1921
1922                 const auto &blob(blobs[total == 0 ? CSSLOT_CODEDIRECTORY : CSSLOT_ALTERNATE + total - 1]);
1923                 ++total;
1924
1925                 std::vector<char> hash;
1926                 algorithm(hash, blob.data(), blob.size());
1927                 hash.resize(20);
1928
1929                 plist_array_append_item(cdhashes, plist_new_data(hash.data(), hash.size()));
1930             }
1931
1932             char *xml(NULL);
1933             uint32_t size;
1934             plist_to_xml(plist, &xml, &size);
1935             _scope({ free(xml); });
1936
1937             std::stringbuf data;
1938             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1939
1940             Stuff stuff(key);
1941             Buffer bio(sign);
1942
1943             Signature signature(stuff, sign, std::string(xml, size));
1944             Buffer result(signature);
1945             std::string value(result);
1946             put(data, value.data(), value.size());
1947
1948             const auto &save(insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data));
1949             _assert(save.size() <= certificate);
1950         }
1951 #endif
1952
1953         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1954     }), percent);
1955
1956     return hash;
1957 }
1958
1959 #ifndef LDID_NOTOOLS
1960 static void Unsign(void *idata, size_t isize, std::streambuf &output, const Functor<void (double)> &percent) {
1961     Allocate(idata, isize, output, fun([](const MachHeader &mach_header, size_t size) -> size_t {
1962         return 0;
1963     }), 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 {
1964         return 0;
1965     }), percent);
1966 }
1967
1968 std::string DiskFolder::Path(const std::string &path) const {
1969     return path_ + "/" + path;
1970 }
1971
1972 DiskFolder::DiskFolder(const std::string &path) :
1973     path_(path)
1974 {
1975 }
1976
1977 DiskFolder::~DiskFolder() {
1978     if (!std::uncaught_exception())
1979         for (const auto &commit : commit_)
1980             Commit(commit.first, commit.second);
1981 }
1982
1983 #ifndef __WIN32__
1984 std::string readlink(const std::string &path) {
1985     for (size_t size(1024); ; size *= 2) {
1986         std::string data;
1987         data.resize(size);
1988
1989         int writ(_syscall(::readlink(path.c_str(), &data[0], data.size())));
1990         if (size_t(writ) >= size)
1991             continue;
1992
1993         data.resize(writ);
1994         return data;
1995     }
1996 }
1997 #endif
1998
1999 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 {
2000     std::string path(Path(root) + base);
2001
2002     DIR *dir(opendir(path.c_str()));
2003     _assert(dir != NULL);
2004     _scope({ _syscall(closedir(dir)); });
2005
2006     while (auto child = readdir(dir)) {
2007         std::string name(child->d_name);
2008         if (name == "." || name == "..")
2009             continue;
2010         if (Starts(name, ".ldid."))
2011             continue;
2012
2013         bool directory;
2014
2015 #ifdef __WIN32__
2016         struct stat info;
2017         _syscall(stat((path + name).c_str(), &info));
2018         if (false);
2019         else if (S_ISDIR(info.st_mode))
2020             directory = true;
2021         else if (S_ISREG(info.st_mode))
2022             directory = false;
2023         else
2024             _assert_(false, "st_mode=%x", info.st_mode);
2025 #else
2026         switch (child->d_type) {
2027             case DT_DIR:
2028                 directory = true;
2029                 break;
2030             case DT_REG:
2031                 directory = false;
2032                 break;
2033             case DT_LNK:
2034                 link(base + name, fun([&]() { return readlink(path + name); }));
2035                 continue;
2036             default:
2037                 _assert_(false, "d_type=%u", child->d_type);
2038         }
2039 #endif
2040
2041         if (directory)
2042             Find(root, base + name + "/", code, link);
2043         else
2044             code(base + name);
2045     }
2046 }
2047
2048 void DiskFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2049     if (!edit) {
2050         // XXX: use nullbuf
2051         std::stringbuf save;
2052         code(save);
2053     } else {
2054         std::filebuf save;
2055         auto from(Path(path));
2056         commit_[from] = Temporary(save, from);
2057         code(save);
2058     }
2059 }
2060
2061 bool DiskFolder::Look(const std::string &path) const {
2062     return _syscall(access(Path(path).c_str(), R_OK), ENOENT) == 0;
2063 }
2064
2065 void DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2066     std::filebuf data;
2067     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
2068     _assert_(result == &data, "DiskFolder::Open(%s)", path.c_str());
2069
2070     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2071     data.pubseekpos(0, std::ios::in);
2072     code(data, length, NULL);
2073 }
2074
2075 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 {
2076     Find(path, "", code, link);
2077 }
2078 #endif
2079
2080 SubFolder::SubFolder(Folder &parent, const std::string &path) :
2081     parent_(parent),
2082     path_(path)
2083 {
2084 }
2085
2086 void SubFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2087     return parent_.Save(path_ + path, edit, flag, code);
2088 }
2089
2090 bool SubFolder::Look(const std::string &path) const {
2091     return parent_.Look(path_ + path);
2092 }
2093
2094 void SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2095     return parent_.Open(path_ + path, code);
2096 }
2097
2098 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 {
2099     return parent_.Find(path_ + path, code, link);
2100 }
2101
2102 std::string UnionFolder::Map(const std::string &path) const {
2103     auto remap(remaps_.find(path));
2104     if (remap == remaps_.end())
2105         return path;
2106     return remap->second;
2107 }
2108
2109 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 {
2110     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
2111         code(file.substr(path.size()));
2112 }
2113
2114 UnionFolder::UnionFolder(Folder &parent) :
2115     parent_(parent)
2116 {
2117 }
2118
2119 void UnionFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2120     return parent_.Save(Map(path), edit, flag, code);
2121 }
2122
2123 bool UnionFolder::Look(const std::string &path) const {
2124     auto file(resets_.find(path));
2125     if (file != resets_.end())
2126         return true;
2127     return parent_.Look(Map(path));
2128 }
2129
2130 void UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2131     auto file(resets_.find(path));
2132     if (file == resets_.end())
2133         return parent_.Open(Map(path), code);
2134     auto &entry(file->second);
2135
2136     auto &data(*entry.data_);
2137     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2138     data.pubseekpos(0, std::ios::in);
2139     code(data, length, entry.flag_);
2140 }
2141
2142 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 {
2143     for (auto &reset : resets_)
2144         Map(path, code, reset.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
2145             auto &entry(reset.second);
2146             auto &data(*entry.data_);
2147             auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2148             data.pubseekpos(0, std::ios::in);
2149             code(data, length, entry.flag_);
2150         }));
2151
2152     for (auto &remap : remaps_)
2153         Map(path, code, remap.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
2154             parent_.Open(remap.second, fun([&](std::streambuf &data, size_t length, const void *flag) {
2155                 code(data, length, flag);
2156             }));
2157         }));
2158
2159     parent_.Find(path, fun([&](const std::string &name) {
2160         if (deletes_.find(path + name) == deletes_.end())
2161             code(name);
2162     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2163         if (deletes_.find(path + name) == deletes_.end())
2164             link(name, read);
2165     }));
2166 }
2167
2168 #ifndef LDID_NOTOOLS
2169 static void copy(std::streambuf &source, std::streambuf &target, size_t length, const ldid::Functor<void (double)> &percent) {
2170     percent(0);
2171     size_t total(0);
2172     for (;;) {
2173         char data[4096 * 4];
2174         size_t writ(source.sgetn(data, sizeof(data)));
2175         if (writ == 0)
2176             break;
2177         _assert(target.sputn(data, writ) == writ);
2178         total += writ;
2179         percent(double(total) / length);
2180     }
2181 }
2182
2183 #ifndef LDID_NOPLIST
2184 static plist_t plist(const std::string &data) {
2185     plist_t plist(NULL);
2186     if (Starts(data, "bplist00"))
2187         plist_from_bin(data.data(), data.size(), &plist);
2188     else
2189         plist_from_xml(data.data(), data.size(), &plist);
2190     _assert(plist != NULL);
2191     return plist;
2192 }
2193
2194 static void plist_d(std::streambuf &buffer, size_t length, const Functor<void (plist_t)> &code) {
2195     std::stringbuf data;
2196     copy(buffer, data, length, ldid::fun(dummy));
2197     auto node(plist(data.str()));
2198     _scope({ plist_free(node); });
2199     _assert(plist_get_node_type(node) == PLIST_DICT);
2200     code(node);
2201 }
2202
2203 static std::string plist_s(plist_t node) {
2204     _assert(node != NULL);
2205     _assert(plist_get_node_type(node) == PLIST_STRING);
2206     char *data;
2207     plist_get_string_val(node, &data);
2208     _scope({ free(data); });
2209     return data;
2210 }
2211 #endif
2212
2213 enum Mode {
2214     NoMode,
2215     OptionalMode,
2216     OmitMode,
2217     NestedMode,
2218     TopMode,
2219 };
2220
2221 class Expression {
2222   private:
2223     regex_t regex_;
2224     std::vector<std::string> matches_;
2225
2226   public:
2227     Expression(const std::string &code) {
2228         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED) == 0, "regcomp()");
2229         matches_.resize(regex_.re_nsub + 1);
2230     }
2231
2232     ~Expression() {
2233         regfree(&regex_);
2234     }
2235
2236     bool operator ()(const std::string &data) {
2237         regmatch_t matches[matches_.size()];
2238         auto value(regexec(&regex_, data.c_str(), matches_.size(), matches, 0));
2239         if (value == REG_NOMATCH)
2240             return false;
2241         _assert_(value == 0, "regexec()");
2242         for (size_t i(0); i != matches_.size(); ++i)
2243             matches_[i].assign(data.data() + matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so);
2244         return true;
2245     }
2246
2247     const std::string &operator [](size_t index) const {
2248         return matches_[index];
2249     }
2250 };
2251
2252 struct Rule {
2253     unsigned weight_;
2254     Mode mode_;
2255     std::string code_;
2256
2257     mutable std::auto_ptr<Expression> regex_;
2258
2259     Rule(unsigned weight, Mode mode, const std::string &code) :
2260         weight_(weight),
2261         mode_(mode),
2262         code_(code)
2263     {
2264     }
2265
2266     Rule(const Rule &rhs) :
2267         weight_(rhs.weight_),
2268         mode_(rhs.mode_),
2269         code_(rhs.code_)
2270     {
2271     }
2272
2273     void Compile() const {
2274         regex_.reset(new Expression(code_));
2275     }
2276
2277     bool operator ()(const std::string &data) const {
2278         _assert(regex_.get() != NULL);
2279         return (*regex_)(data);
2280     }
2281
2282     bool operator <(const Rule &rhs) const {
2283         if (weight_ > rhs.weight_)
2284             return true;
2285         if (weight_ < rhs.weight_)
2286             return false;
2287         return mode_ > rhs.mode_;
2288     }
2289 };
2290
2291 struct RuleCode {
2292     bool operator ()(const Rule *lhs, const Rule *rhs) const {
2293         return lhs->code_ < rhs->code_;
2294     }
2295 };
2296
2297 #ifndef LDID_NOPLIST
2298 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 &requirements, const std::string &key, const Slots &slots, size_t length, const Functor<void (double)> &percent) {
2299     // XXX: this is a miserable fail
2300     std::stringbuf temp;
2301     put(temp, prefix, size);
2302     copy(buffer, temp, length - size, percent);
2303     // XXX: this is a stupid hack
2304     pad(temp, 0x10 - (length & 0xf));
2305     auto data(temp.str());
2306
2307     HashProxy proxy(hash, save);
2308     return Sign(data.data(), data.size(), proxy, identifier, entitlements, requirements, key, slots, percent);
2309 }
2310
2311 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, std::map<std::string, Hash> &remote, const std::string &requirements, const Functor<std::string (const std::string &, const std::string &)> &alter, const Functor<void (const std::string &)> &progress, const Functor<void (double)> &percent) {
2312     std::string executable;
2313     std::string identifier;
2314
2315     bool mac(false);
2316
2317     std::string info("Info.plist");
2318     if (!folder.Look(info) && folder.Look("Resources/" + info)) {
2319         mac = true;
2320         info = "Resources/" + info;
2321     }
2322
2323     folder.Open(info, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2324         plist_d(buffer, length, fun([&](plist_t node) {
2325             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
2326             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
2327         }));
2328     }));
2329
2330     if (!mac && folder.Look("MacOS/" + executable)) {
2331         executable = "MacOS/" + executable;
2332         mac = true;
2333     }
2334
2335     std::string entitlements;
2336     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2337         // XXX: this is a miserable fail
2338         std::stringbuf temp;
2339         copy(buffer, temp, length, percent);
2340         // XXX: this is a stupid hack
2341         pad(temp, 0x10 - (length & 0xf));
2342         auto data(temp.str());
2343         entitlements = alter(root, Analyze(data.data(), data.size()));
2344     }));
2345
2346     static const std::string directory("_CodeSignature/");
2347     static const std::string signature(directory + "CodeResources");
2348
2349     std::map<std::string, std::multiset<Rule>> versions;
2350
2351     auto &rules1(versions[""]);
2352     auto &rules2(versions["2"]);
2353
2354     const std::string resources(mac ? "Resources/" : "");
2355
2356     if (true) {
2357         rules1.insert(Rule{1, NoMode, "^" + resources});
2358         rules1.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2359         rules1.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2360         rules1.insert(Rule{1010, NoMode, "^Base\\.lproj/"});
2361         rules1.insert(Rule{1, NoMode, "^version.plist$"});
2362     }
2363
2364     if (true) {
2365         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
2366         rules2.insert(Rule{20, NoMode, "^" + resources});
2367         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
2368         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
2369         rules2.insert(Rule{1, NoMode, "^.*"});
2370         rules2.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2371         rules2.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2372         rules2.insert(Rule{1010, NoMode, "^Base\\.lproj/"});
2373         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
2374         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
2375         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
2376         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
2377         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
2378     }
2379
2380     std::map<std::string, Hash> local;
2381
2382     std::string failure(mac ? "Contents/|Versions/[^/]*/Resources/" : "");
2383     Expression nested("^(Frameworks/[^/]*\\.framework|PlugIns/[^/]*\\.appex(()|/[^/]*.app))/(" + failure + ")Info\\.plist$");
2384     std::map<std::string, Bundle> bundles;
2385
2386     folder.Find("", fun([&](const std::string &name) {
2387         if (!nested(name))
2388             return;
2389         auto bundle(root + Split(name).dir);
2390         bundle.resize(bundle.size() - resources.size());
2391         SubFolder subfolder(folder, bundle);
2392
2393         bundles[nested[1]] = Sign(bundle, subfolder, key, local, "", Starts(name, "PlugIns/") ? alter :
2394             static_cast<const Functor<std::string (const std::string &, const std::string &)> &>(fun([&](const std::string &, const std::string &entitlements) -> std::string { return entitlements; }))
2395         , progress, percent);
2396     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2397     }));
2398
2399     std::set<std::string> excludes;
2400
2401     auto exclude([&](const std::string &name) {
2402         // BundleDiskRep::adjustResources -> builder.addExclusion
2403         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
2404             return true;
2405
2406         for (const auto &bundle : bundles)
2407             if (Starts(name, bundle.first + "/")) {
2408                 excludes.insert(name);
2409                 return true;
2410             }
2411
2412         return false;
2413     });
2414
2415     std::map<std::string, std::string> links;
2416
2417     folder.Find("", fun([&](const std::string &name) {
2418         if (exclude(name))
2419             return;
2420
2421         if (local.find(name) != local.end())
2422             return;
2423         auto &hash(local[name]);
2424
2425         folder.Open(name, fun([&](std::streambuf &data, size_t length, const void *flag) {
2426             progress(root + name);
2427
2428             union {
2429                 struct {
2430                     uint32_t magic;
2431                     uint32_t count;
2432                 };
2433
2434                 uint8_t bytes[8];
2435             } header;
2436
2437             auto size(most(data, &header.bytes, sizeof(header.bytes)));
2438
2439             if (name != "_WatchKitStub/WK" && size == sizeof(header.bytes))
2440                 switch (Swap(header.magic)) {
2441                     case FAT_MAGIC:
2442                         // Java class file format
2443                         if (Swap(header.count) >= 40)
2444                             break;
2445                     case FAT_CIGAM:
2446                     case MH_MAGIC: case MH_MAGIC_64:
2447                     case MH_CIGAM: case MH_CIGAM_64:
2448                         folder.Save(name, true, flag, fun([&](std::streambuf &save) {
2449                             Slots slots;
2450                             Sign(header.bytes, size, data, hash, save, identifier, "", "", key, slots, length, percent);
2451                         }));
2452                         return;
2453                 }
2454
2455             folder.Save(name, false, flag, fun([&](std::streambuf &save) {
2456                 HashProxy proxy(hash, save);
2457                 put(proxy, header.bytes, size);
2458                 copy(data, proxy, length - size, percent);
2459             }));
2460         }));
2461     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2462         if (exclude(name))
2463             return;
2464
2465         links[name] = read();
2466     }));
2467
2468     auto plist(plist_new_dict());
2469     _scope({ plist_free(plist); });
2470
2471     for (const auto &version : versions) {
2472         auto files(plist_new_dict());
2473         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2474
2475         for (const auto &rule : version.second)
2476             rule.Compile();
2477
2478         bool old(&version.second == &rules1);
2479
2480         for (const auto &hash : local)
2481             for (const auto &rule : version.second)
2482                 if (rule(hash.first)) {
2483                     if (!old && mac && excludes.find(hash.first) != excludes.end());
2484                     else if (old && rule.mode_ == NoMode)
2485                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2486                     else if (rule.mode_ != OmitMode) {
2487                         auto entry(plist_new_dict());
2488                         plist_dict_set_item(entry, "hash", plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2489                         if (!old)
2490                             plist_dict_set_item(entry, "hash2", plist_new_data(reinterpret_cast<const char *>(hash.second.sha256_), sizeof(hash.second.sha256_)));
2491                         if (rule.mode_ == OptionalMode)
2492                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2493                         plist_dict_set_item(files, hash.first.c_str(), entry);
2494                     }
2495
2496                     break;
2497                 }
2498
2499         for (const auto &link : links)
2500             for (const auto &rule : version.second)
2501                 if (rule(link.first)) {
2502                     if (rule.mode_ != OmitMode) {
2503                         auto entry(plist_new_dict());
2504                         plist_dict_set_item(entry, "symlink", plist_new_string(link.second.c_str()));
2505                         if (rule.mode_ == OptionalMode)
2506                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2507                         plist_dict_set_item(files, link.first.c_str(), entry);
2508                     }
2509
2510                     break;
2511                 }
2512
2513         if (!old && mac)
2514             for (const auto &bundle : bundles) {
2515                 auto entry(plist_new_dict());
2516                 plist_dict_set_item(entry, "cdhash", plist_new_data(reinterpret_cast<const char *>(bundle.second.hash.sha256_), sizeof(bundle.second.hash.sha256_)));
2517                 plist_dict_set_item(entry, "requirement", plist_new_string("anchor apple generic"));
2518                 plist_dict_set_item(files, bundle.first.c_str(), entry);
2519             }
2520     }
2521
2522     for (const auto &version : versions) {
2523         auto rules(plist_new_dict());
2524         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2525
2526         std::multiset<const Rule *, RuleCode> ordered;
2527         for (const auto &rule : version.second)
2528             ordered.insert(&rule);
2529
2530         for (const auto &rule : ordered)
2531             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2532                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2533             else {
2534                 auto entry(plist_new_dict());
2535                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2536
2537                 switch (rule->mode_) {
2538                     case NoMode:
2539                         break;
2540                     case OmitMode:
2541                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2542                         break;
2543                     case OptionalMode:
2544                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2545                         break;
2546                     case NestedMode:
2547                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2548                         break;
2549                     case TopMode:
2550                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2551                         break;
2552                 }
2553
2554                 if (rule->weight_ >= 10000)
2555                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2556                 else if (rule->weight_ != 1)
2557                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2558             }
2559     }
2560
2561     folder.Save(signature, true, NULL, fun([&](std::streambuf &save) {
2562         HashProxy proxy(local[signature], save);
2563         char *xml(NULL);
2564         uint32_t size;
2565         plist_to_xml(plist, &xml, &size);
2566         _scope({ free(xml); });
2567         put(proxy, xml, size);
2568     }));
2569
2570     Bundle bundle;
2571     bundle.path = executable;
2572
2573     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2574         progress(root + executable);
2575         folder.Save(executable, true, flag, fun([&](std::streambuf &save) {
2576             Slots slots;
2577             slots[1] = local.at(info);
2578             slots[3] = local.at(signature);
2579             bundle.hash = Sign(NULL, 0, buffer, local[executable], save, identifier, entitlements, requirements, key, slots, length, percent);
2580         }));
2581     }));
2582
2583     for (const auto &entry : local)
2584         remote[root + entry.first] = entry.second;
2585
2586     return bundle;
2587 }
2588
2589 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, const std::string &requirements, const Functor<std::string (const std::string &, const std::string &)> &alter, const Functor<void (const std::string &)> &progress, const Functor<void (double)> &percent) {
2590     std::map<std::string, Hash> local;
2591     return Sign(root, folder, key, local, requirements, alter, progress, percent);
2592 }
2593 #endif
2594
2595 #endif
2596 }
2597
2598 #ifndef LDID_NOTOOLS
2599 int main(int argc, char *argv[]) {
2600 #ifndef LDID_NOSMIME
2601     OpenSSL_add_all_algorithms();
2602 #endif
2603
2604     union {
2605         uint16_t word;
2606         uint8_t byte[2];
2607     } endian = {1};
2608
2609     little_ = endian.byte[0];
2610
2611     bool flag_r(false);
2612     bool flag_e(false);
2613     bool flag_q(false);
2614
2615 #ifndef LDID_NOFLAGT
2616     bool flag_T(false);
2617 #endif
2618
2619     bool flag_S(false);
2620     bool flag_s(false);
2621
2622     bool flag_D(false);
2623
2624     bool flag_A(false);
2625     bool flag_a(false);
2626
2627     bool flag_u(false);
2628
2629     uint32_t flag_CPUType(_not(uint32_t));
2630     uint32_t flag_CPUSubtype(_not(uint32_t));
2631
2632     const char *flag_I(NULL);
2633
2634 #ifndef LDID_NOFLAGT
2635     bool timeh(false);
2636     uint32_t timev(0);
2637 #endif
2638
2639     Map entitlements;
2640     Map requirements;
2641     Map key;
2642     ldid::Slots slots;
2643
2644     std::vector<std::string> files;
2645
2646     if (argc == 1) {
2647         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2648         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2649         fprintf(stderr, "   %s -S cat\n", argv[0]);
2650         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2651         exit(0);
2652     }
2653
2654     for (int argi(1); argi != argc; ++argi)
2655         if (argv[argi][0] != '-')
2656             files.push_back(argv[argi]);
2657         else switch (argv[argi][1]) {
2658             case 'r':
2659                 _assert(!flag_s);
2660                 _assert(!flag_S);
2661                 flag_r = true;
2662             break;
2663
2664             case 'e': flag_e = true; break;
2665
2666             case 'E': {
2667                 const char *string = argv[argi] + 2;
2668                 const char *colon = strchr(string, ':');
2669                 _assert(colon != NULL);
2670                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2671                 char *arge;
2672                 unsigned number(strtoul(string, &arge, 0));
2673                 _assert(arge == colon);
2674                 auto &slot(slots[number]);
2675                 for (Algorithm *algorithm : GetAlgorithms())
2676                     (*algorithm)(slot, file.data(), file.size());
2677             } break;
2678
2679             case 'q': flag_q = true; break;
2680
2681             case 'Q': {
2682                 const char *xml = argv[argi] + 2;
2683                 requirements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2684             } break;
2685
2686             case 'D': flag_D = true; break;
2687
2688             case 'a': flag_a = true; break;
2689
2690             case 'A':
2691                 _assert(!flag_A);
2692                 flag_A = true;
2693                 if (argv[argi][2] != '\0') {
2694                     const char *cpu = argv[argi] + 2;
2695                     const char *colon = strchr(cpu, ':');
2696                     _assert(colon != NULL);
2697                     char *arge;
2698                     flag_CPUType = strtoul(cpu, &arge, 0);
2699                     _assert(arge == colon);
2700                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2701                     _assert(arge == argv[argi] + strlen(argv[argi]));
2702                 }
2703             break;
2704
2705             case 's':
2706                 _assert(!flag_r);
2707                 _assert(!flag_S);
2708                 flag_s = true;
2709             break;
2710
2711             case 'S':
2712                 _assert(!flag_r);
2713                 _assert(!flag_s);
2714                 flag_S = true;
2715                 if (argv[argi][2] != '\0') {
2716                     const char *xml = argv[argi] + 2;
2717                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2718                 }
2719             break;
2720
2721             case 'K':
2722                 if (argv[argi][2] != '\0')
2723                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2724             break;
2725
2726 #ifndef LDID_NOFLAGT
2727             case 'T': {
2728                 flag_T = true;
2729                 if (argv[argi][2] == '-')
2730                     timeh = true;
2731                 else {
2732                     char *arge;
2733                     timev = strtoul(argv[argi] + 2, &arge, 0);
2734                     _assert(arge == argv[argi] + strlen(argv[argi]));
2735                 }
2736             } break;
2737 #endif
2738
2739             case 'u': {
2740                 flag_u = true;
2741             } break;
2742
2743             case 'I': {
2744                 flag_I = argv[argi] + 2;
2745             } break;
2746
2747             default:
2748                 goto usage;
2749             break;
2750         }
2751
2752     _assert(flag_S || key.empty());
2753     _assert(flag_S || flag_I == NULL);
2754
2755     if (files.empty()) usage: {
2756         exit(0);
2757     }
2758
2759     size_t filei(0), filee(0);
2760     _foreach (file, files) try {
2761         std::string path(file);
2762
2763         struct stat info;
2764         _syscall(stat(path.c_str(), &info));
2765
2766         if (S_ISDIR(info.st_mode)) {
2767 #ifndef LDID_NOPLIST
2768             _assert(!flag_r);
2769             ldid::DiskFolder folder(path);
2770             path += "/" + Sign("", folder, key, requirements, ldid::fun([&](const std::string &, const std::string &) -> std::string { return entitlements; })
2771                 , ldid::fun([&](const std::string &) {}), ldid::fun(dummy)
2772             ).path;
2773 #else
2774             _assert(false);
2775 #endif
2776         } else if (flag_S || flag_r) {
2777             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2778
2779             std::filebuf output;
2780             Split split(path);
2781             auto temp(Temporary(output, split));
2782
2783             if (flag_r)
2784                 ldid::Unsign(input.data(), input.size(), output, ldid::fun(dummy));
2785             else {
2786                 std::string identifier(flag_I ?: split.base.c_str());
2787                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, requirements, key, slots, ldid::fun(dummy));
2788             }
2789
2790             Commit(path, temp);
2791         }
2792
2793         bool modify(false);
2794 #ifndef LDID_NOFLAGT
2795         if (flag_T)
2796             modify = true;
2797 #endif
2798         if (flag_s)
2799             modify = true;
2800
2801         Map mapping(path, modify);
2802         FatHeader fat_header(mapping.data(), mapping.size());
2803
2804         _foreach (mach_header, fat_header.GetMachHeaders()) {
2805             struct linkedit_data_command *signature(NULL);
2806             struct encryption_info_command *encryption(NULL);
2807
2808             if (flag_A) {
2809                 if (mach_header.GetCPUType() != flag_CPUType)
2810                     continue;
2811                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2812                     continue;
2813             }
2814
2815             if (flag_a)
2816                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2817
2818             _foreach (load_command, mach_header.GetLoadCommands()) {
2819                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2820
2821                 if (false);
2822                 else if (cmd == LC_CODE_SIGNATURE)
2823                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2824                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2825                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2826                 else if (cmd == LC_LOAD_DYLIB) {
2827                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2828                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2829
2830                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2831                         if (flag_u) {
2832                             Version version;
2833                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2834                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2835                         }
2836                     }
2837                 }
2838 #ifndef LDID_NOFLAGT
2839                 else if (cmd == LC_ID_DYLIB) {
2840                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2841
2842                     if (flag_T) {
2843                         uint32_t timed;
2844
2845                         if (!timeh)
2846                             timed = timev;
2847                         else {
2848                             dylib_command->dylib.timestamp = 0;
2849                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2850                         }
2851
2852                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2853                     }
2854                 }
2855 #endif
2856             }
2857
2858             if (flag_D) {
2859                 _assert(encryption != NULL);
2860                 encryption->cryptid = mach_header.Swap(0);
2861             }
2862
2863             if (flag_e) {
2864                 _assert(signature != NULL);
2865
2866                 uint32_t data = mach_header.Swap(signature->dataoff);
2867
2868                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2869                 uint8_t *blob = top + data;
2870                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2871
2872                 for (size_t index(0); index != Swap(super->count); ++index)
2873                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2874                         uint32_t begin = Swap(super->index[index].offset);
2875                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2876                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2877                     }
2878             }
2879
2880             if (flag_q) {
2881                 _assert(signature != NULL);
2882
2883                 uint32_t data = mach_header.Swap(signature->dataoff);
2884
2885                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2886                 uint8_t *blob = top + data;
2887                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2888
2889                 for (size_t index(0); index != Swap(super->count); ++index)
2890                     if (Swap(super->index[index].type) == CSSLOT_REQUIREMENTS) {
2891                         uint32_t begin = Swap(super->index[index].offset);
2892                         struct Blob *requirement = reinterpret_cast<struct Blob *>(blob + begin);
2893                         fwrite(requirement, 1, Swap(requirement->length), stdout);
2894                     }
2895             }
2896
2897             if (flag_s) {
2898                 _assert(signature != NULL);
2899
2900                 uint32_t data = mach_header.Swap(signature->dataoff);
2901
2902                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2903                 uint8_t *blob = top + data;
2904                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2905
2906                 for (size_t index(0); index != Swap(super->count); ++index)
2907                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2908                         uint32_t begin = Swap(super->index[index].offset);
2909                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin + sizeof(Blob));
2910
2911                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2912                         uint32_t pages = Swap(directory->nCodeSlots);
2913
2914                         if (pages != 1)
2915                             for (size_t i = 0; i != pages - 1; ++i)
2916                                 LDID_SHA1(top + PageSize_ * i, PageSize_, hashes[i]);
2917                         if (pages != 0)
2918                             LDID_SHA1(top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1, hashes[pages - 1]);
2919                     }
2920             }
2921         }
2922
2923         ++filei;
2924     } catch (const char *) {
2925         ++filee;
2926         ++filei;
2927     }
2928
2929     return filee;
2930 }
2931 #endif