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     virtual const char *name() = 0;
 938 };
 939
 940 struct AlgorithmSHA1 :
 941     Algorithm
 942 {
 943     AlgorithmSHA1() :
 944         Algorithm(LDID_SHA1_DIGEST_LENGTH, CS_HASHTYPE_SHA160_160)
 945     {
 946     }
 947
 948     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
 949         return hash.sha1_;
 950     }
 951
 952     void operator ()(uint8_t *hash, const void *data, size_t size) const {
 953         LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 954     }
 955
 956     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
 957         return operator()(hash.sha1_, data, size);
 958     }
 959
 960     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
 961         hash.resize(LDID_SHA1_DIGEST_LENGTH);
 962         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 963     }
 964
 965     virtual const char *name() {
 966         return "sha1";
 967     }
 968 };
 969
 970 struct AlgorithmSHA256 :
 971     Algorithm
 972 {
 973     AlgorithmSHA256() :
 974         Algorithm(LDID_SHA256_DIGEST_LENGTH, CS_HASHTYPE_SHA256_256)
 975     {
 976     }
 977
 978     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
 979         return hash.sha256_;
 980     }
 981
 982     void operator ()(uint8_t *hash, const void *data, size_t size) const {
 983         LDID_SHA256(static_cast<const uint8_t *>(data), size, hash);
 984     }
 985
 986     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
 987         return operator()(hash.sha256_, data, size);
 988     }
 989
 990     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
 991         hash.resize(LDID_SHA256_DIGEST_LENGTH);
 992         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 993     }
 994
 995     virtual const char *name() {
 996         return "sha256";
 997     }
 998 };
 999
1000 static const std::vector<Algorithm *> &GetAlgorithms() {
1001     static AlgorithmSHA1 sha1;
1002     static AlgorithmSHA256 sha256;
1003
1004     static Algorithm *array[] = {
1005         &sha1,
1006         &sha256,
1007     };
1008
1009     static std::vector<Algorithm *> algorithms(array, array + sizeof(array) / sizeof(array[0]));
1010     return algorithms;
1011 }
1012
1013 struct CodesignAllocation {
1014     FatMachHeader mach_header_;
1015     uint32_t offset_;
1016     uint32_t size_;
1017     uint32_t limit_;
1018     uint32_t alloc_;
1019     uint32_t align_;
1020
1021     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
1022         mach_header_(mach_header),
1023         offset_(offset),
1024         size_(size),
1025         limit_(limit),
1026         alloc_(alloc),
1027         align_(align)
1028     {
1029     }
1030 };
1031
1032 #ifndef LDID_NOTOOLS
1033 class File {
1034   private:
1035     int file_;
1036
1037   public:
1038     File() :
1039         file_(-1)
1040     {
1041     }
1042
1043     ~File() {
1044         if (file_ != -1)
1045             _syscall(close(file_));
1046     }
1047
1048     void open(const char *path, int flags) {
1049         _assert(file_ == -1);
1050         file_ = _syscall(::open(path, flags));
1051     }
1052
1053     int file() const {
1054         return file_;
1055     }
1056 };
1057
1058 class Map {
1059   private:
1060     File file_;
1061     void *data_;
1062     size_t size_;
1063
1064     void clear() {
1065         if (data_ == NULL)
1066             return;
1067         _syscall(munmap(data_, size_));
1068         data_ = NULL;
1069         size_ = 0;
1070     }
1071
1072   public:
1073     Map() :
1074         data_(NULL),
1075         size_(0)
1076     {
1077     }
1078
1079     Map(const std::string &path, int oflag, int pflag, int mflag) :
1080         Map()
1081     {
1082         open(path, oflag, pflag, mflag);
1083     }
1084
1085     Map(const std::string &path, bool edit) :
1086         Map()
1087     {
1088         open(path, edit);
1089     }
1090
1091     ~Map() {
1092         clear();
1093     }
1094
1095     bool empty() const {
1096         return data_ == NULL;
1097     }
1098
1099     void open(const std::string &path, int oflag, int pflag, int mflag) {
1100         clear();
1101
1102         file_.open(path.c_str(), oflag);
1103         int file(file_.file());
1104
1105         struct stat stat;
1106         _syscall(fstat(file, &stat));
1107         size_ = stat.st_size;
1108
1109         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
1110     }
1111
1112     void open(const std::string &path, bool edit) {
1113         if (edit)
1114             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
1115         else
1116             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
1117     }
1118
1119     void *data() const {
1120         return data_;
1121     }
1122
1123     size_t size() const {
1124         return size_;
1125     }
1126
1127     operator std::string() const {
1128         return std::string(static_cast<char *>(data_), size_);
1129     }
1130 };
1131 #endif
1132
1133 namespace ldid {
1134
1135 std::string Analyze(const void *data, size_t size) {
1136     std::string entitlements;
1137
1138     FatHeader fat_header(const_cast<void *>(data), size);
1139     _foreach (mach_header, fat_header.GetMachHeaders())
1140         _foreach (load_command, mach_header.GetLoadCommands())
1141             if (mach_header.Swap(load_command->cmd) == LC_CODE_SIGNATURE) {
1142                 auto signature(reinterpret_cast<struct linkedit_data_command *>(load_command));
1143                 auto offset(mach_header.Swap(signature->dataoff));
1144                 auto pointer(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + offset);
1145                 auto super(reinterpret_cast<struct SuperBlob *>(pointer));
1146
1147                 for (size_t index(0); index != Swap(super->count); ++index)
1148                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
1149                         auto begin(Swap(super->index[index].offset));
1150                         auto blob(reinterpret_cast<struct Blob *>(pointer + begin));
1151                         auto writ(Swap(blob->length) - sizeof(*blob));
1152
1153                         if (entitlements.empty())
1154                             entitlements.assign(reinterpret_cast<char *>(blob + 1), writ);
1155                         else
1156                             _assert(entitlements.compare(0, entitlements.size(), reinterpret_cast<char *>(blob + 1), writ) == 0);
1157                     }
1158             }
1159
1160     return entitlements;
1161 }
1162
1163 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) {
1164     FatHeader source(const_cast<void *>(idata), isize);
1165
1166     size_t offset(0);
1167     if (source.IsFat())
1168         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
1169
1170     std::vector<CodesignAllocation> allocations;
1171     _foreach (mach_header, source.GetMachHeaders()) {
1172         struct linkedit_data_command *signature(NULL);
1173         struct symtab_command *symtab(NULL);
1174
1175         _foreach (load_command, mach_header.GetLoadCommands()) {
1176             uint32_t cmd(mach_header.Swap(load_command->cmd));
1177             if (false);
1178             else if (cmd == LC_CODE_SIGNATURE)
1179                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1180             else if (cmd == LC_SYMTAB)
1181                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
1182         }
1183
1184         size_t size;
1185         if (signature == NULL)
1186             size = mach_header.GetSize();
1187         else {
1188             size = mach_header.Swap(signature->dataoff);
1189             _assert(size <= mach_header.GetSize());
1190         }
1191
1192         if (symtab != NULL) {
1193             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
1194             _assert(end <= size);
1195             _assert(end >= size - 0x10);
1196             size = end;
1197         }
1198
1199         size_t alloc(allocate(mach_header, size));
1200
1201         auto *fat_arch(mach_header.GetFatArch());
1202         uint32_t align;
1203
1204         if (fat_arch != NULL)
1205             align = source.Swap(fat_arch->align);
1206         else switch (mach_header.GetCPUType()) {
1207             case CPU_TYPE_POWERPC:
1208             case CPU_TYPE_POWERPC64:
1209             case CPU_TYPE_X86:
1210             case CPU_TYPE_X86_64:
1211                 align = 0xc;
1212                 break;
1213             case CPU_TYPE_ARM:
1214             case CPU_TYPE_ARM64:
1215                 align = 0xe;
1216                 break;
1217             default:
1218                 align = 0x0;
1219                 break;
1220         }
1221
1222         offset = Align(offset, 1 << align);
1223
1224         uint32_t limit(size);
1225         if (alloc != 0)
1226             limit = Align(limit, 0x10);
1227
1228         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
1229         offset += size + alloc;
1230         offset = Align(offset, 0x10);
1231     }
1232
1233     size_t position(0);
1234
1235     if (source.IsFat()) {
1236         fat_header fat_header;
1237         fat_header.magic = Swap(FAT_MAGIC);
1238         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1239         put(output, &fat_header, sizeof(fat_header));
1240         position += sizeof(fat_header);
1241
1242         _foreach (allocation, allocations) {
1243             auto &mach_header(allocation.mach_header_);
1244
1245             fat_arch fat_arch;
1246             fat_arch.cputype = Swap(mach_header->cputype);
1247             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1248             fat_arch.offset = Swap(allocation.offset_);
1249             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1250             fat_arch.align = Swap(allocation.align_);
1251             put(output, &fat_arch, sizeof(fat_arch));
1252             position += sizeof(fat_arch);
1253         }
1254     }
1255
1256     _foreach (allocation, allocations) {
1257         auto &mach_header(allocation.mach_header_);
1258
1259         pad(output, allocation.offset_ - position);
1260         position = allocation.offset_;
1261
1262         std::vector<std::string> commands;
1263
1264         _foreach (load_command, mach_header.GetLoadCommands()) {
1265             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1266
1267             switch (mach_header.Swap(load_command->cmd)) {
1268                 case LC_CODE_SIGNATURE:
1269                     continue;
1270                 break;
1271
1272                 case LC_SEGMENT: {
1273                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1274                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1275                         break;
1276                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1277                     segment_command->filesize = size;
1278                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1279                 } break;
1280
1281                 case LC_SEGMENT_64: {
1282                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1283                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1284                         break;
1285                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1286                     segment_command->filesize = size;
1287                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1288                 } break;
1289             }
1290
1291             commands.push_back(copy);
1292         }
1293
1294         if (allocation.alloc_ != 0) {
1295             linkedit_data_command signature;
1296             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1297             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1298             signature.dataoff = mach_header.Swap(allocation.limit_);
1299             signature.datasize = mach_header.Swap(allocation.alloc_);
1300             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1301         }
1302
1303         size_t begin(position);
1304
1305         uint32_t after(0);
1306         _foreach(command, commands)
1307             after += command.size();
1308
1309         std::stringbuf altern;
1310
1311         struct mach_header header(*mach_header);
1312         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1313         header.sizeofcmds = mach_header.Swap(after);
1314         put(output, &header, sizeof(header));
1315         put(altern, &header, sizeof(header));
1316         position += sizeof(header);
1317
1318         if (mach_header.Bits64()) {
1319             auto pad(mach_header.Swap(uint32_t(0)));
1320             put(output, &pad, sizeof(pad));
1321             put(altern, &pad, sizeof(pad));
1322             position += sizeof(pad);
1323         }
1324
1325         _foreach(command, commands) {
1326             put(output, command.data(), command.size());
1327             put(altern, command.data(), command.size());
1328             position += command.size();
1329         }
1330
1331         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1332         if (before > after) {
1333             pad(output, before - after);
1334             pad(altern, before - after);
1335             position += before - after;
1336         }
1337
1338         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1339
1340         std::string overlap(altern.str());
1341         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1342
1343         put(output, top + (position - begin), allocation.size_ - (position - begin), percent);
1344         position = begin + allocation.size_;
1345
1346         pad(output, allocation.limit_ - allocation.size_);
1347         position += allocation.limit_ - allocation.size_;
1348
1349         size_t saved(save(mach_header, output, allocation.limit_, overlap, top, percent));
1350         if (allocation.alloc_ > saved)
1351             pad(output, allocation.alloc_ - saved);
1352         else
1353             _assert(allocation.alloc_ == saved);
1354         position += allocation.alloc_;
1355     }
1356 }
1357
1358 }
1359
1360 typedef std::map<uint32_t, std::string> Blobs;
1361
1362 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1363     auto value(buffer.str());
1364     std::swap(blobs[slot], value);
1365 }
1366
1367 static const std::string &insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1368     auto value(buffer.str());
1369     Blob blob;
1370     blob.magic = Swap(magic);
1371     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1372     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1373     auto &save(blobs[slot]);
1374     std::swap(save, value);
1375     return save;
1376 }
1377
1378 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1379     size_t total(0);
1380     _foreach (blob, blobs)
1381         total += blob.second.size();
1382
1383     struct SuperBlob super;
1384     super.blob.magic = Swap(magic);
1385     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1386     super.count = Swap(uint32_t(blobs.size()));
1387     put(output, &super, sizeof(super));
1388
1389     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1390
1391     _foreach (blob, blobs) {
1392         BlobIndex index;
1393         index.type = Swap(blob.first);
1394         index.offset = Swap(uint32_t(offset));
1395         put(output, &index, sizeof(index));
1396         offset += blob.second.size();
1397     }
1398
1399     _foreach (blob, blobs)
1400         put(output, blob.second.data(), blob.second.size());
1401
1402     return offset;
1403 }
1404
1405 #ifndef LDID_NOSMIME
1406 class Buffer {
1407   private:
1408     BIO *bio_;
1409
1410   public:
1411     Buffer(BIO *bio) :
1412         bio_(bio)
1413     {
1414         _assert(bio_ != NULL);
1415     }
1416
1417     Buffer() :
1418         bio_(BIO_new(BIO_s_mem()))
1419     {
1420     }
1421
1422     Buffer(const char *data, size_t size) :
1423         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1424     {
1425     }
1426
1427     Buffer(const std::string &data) :
1428         Buffer(data.data(), data.size())
1429     {
1430     }
1431
1432     Buffer(PKCS7 *pkcs) :
1433         Buffer()
1434     {
1435         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1436     }
1437
1438     ~Buffer() {
1439         BIO_free_all(bio_);
1440     }
1441
1442     operator BIO *() const {
1443         return bio_;
1444     }
1445
1446     explicit operator std::string() const {
1447         char *data;
1448         auto size(BIO_get_mem_data(bio_, &data));
1449         return std::string(data, size);
1450     }
1451 };
1452
1453 class Stuff {
1454   private:
1455     PKCS12 *value_;
1456     EVP_PKEY *key_;
1457     X509 *cert_;
1458     STACK_OF(X509) *ca_;
1459
1460   public:
1461     Stuff(BIO *bio) :
1462         value_(d2i_PKCS12_bio(bio, NULL)),
1463         ca_(NULL)
1464     {
1465         _assert(value_ != NULL);
1466         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1467
1468         _assert(key_ != NULL);
1469         _assert(cert_ != NULL);
1470
1471         if (ca_ == NULL)
1472             ca_ = sk_X509_new_null();
1473         _assert(ca_ != NULL);
1474     }
1475
1476     Stuff(const std::string &data) :
1477         Stuff(Buffer(data))
1478     {
1479     }
1480
1481     ~Stuff() {
1482         sk_X509_pop_free(ca_, X509_free);
1483         X509_free(cert_);
1484         EVP_PKEY_free(key_);
1485         PKCS12_free(value_);
1486     }
1487
1488     operator PKCS12 *() const {
1489         return value_;
1490     }
1491
1492     operator EVP_PKEY *() const {
1493         return key_;
1494     }
1495
1496     operator X509 *() const {
1497         return cert_;
1498     }
1499
1500     operator STACK_OF(X509) *() const {
1501         return ca_;
1502     }
1503 };
1504
1505 class Signature {
1506   private:
1507     PKCS7 *value_;
1508
1509   public:
1510     Signature(const Stuff &stuff, const Buffer &data, const std::string &xml) {
1511         value_ = PKCS7_new();
1512         _assert(value_ != NULL);
1513
1514         _assert(PKCS7_set_type(value_, NID_pkcs7_signed));
1515         _assert(PKCS7_content_new(value_, NID_pkcs7_data));
1516
1517         STACK_OF(X509) *certs(stuff);
1518         for (unsigned i(0), e(sk_X509_num(certs)); i != e; i++)
1519             _assert(PKCS7_add_certificate(value_, sk_X509_value(certs, e - i - 1)));
1520
1521         auto info(PKCS7_sign_add_signer(value_, stuff, stuff, NULL, PKCS7_NOSMIMECAP));
1522         _assert(info != NULL);
1523
1524         PKCS7_set_detached(value_, 1);
1525
1526         ASN1_OCTET_STRING *string(ASN1_OCTET_STRING_new());
1527         _assert(string != NULL);
1528         try {
1529             _assert(ASN1_STRING_set(string, xml.data(), xml.size()));
1530
1531             static auto nid(OBJ_create("1.2.840.113635.100.9.1", "", ""));
1532             _assert(PKCS7_add_signed_attribute(info, nid, V_ASN1_OCTET_STRING, string));
1533         } catch (...) {
1534             ASN1_OCTET_STRING_free(string);
1535             throw;
1536         }
1537
1538         _assert(PKCS7_final(value_, data, PKCS7_BINARY));
1539     }
1540
1541     ~Signature() {
1542         PKCS7_free(value_);
1543     }
1544
1545     operator PKCS7 *() const {
1546         return value_;
1547     }
1548 };
1549 #endif
1550
1551 class NullBuffer :
1552     public std::streambuf
1553 {
1554   public:
1555     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1556         return size;
1557     }
1558
1559     virtual int_type overflow(int_type next) {
1560         return next;
1561     }
1562 };
1563
1564 class Digest {
1565   public:
1566     uint8_t sha1_[LDID_SHA1_DIGEST_LENGTH];
1567 };
1568
1569 class HashBuffer :
1570     public std::streambuf
1571 {
1572   private:
1573     ldid::Hash &hash_;
1574
1575     LDID_SHA1_CTX sha1_;
1576     LDID_SHA256_CTX sha256_;
1577
1578   public:
1579     HashBuffer(ldid::Hash &hash) :
1580         hash_(hash)
1581     {
1582         LDID_SHA1_Init(&sha1_);
1583         LDID_SHA256_Init(&sha256_);
1584     }
1585
1586     ~HashBuffer() {
1587         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.sha1_), &sha1_);
1588         LDID_SHA256_Final(reinterpret_cast<uint8_t *>(hash_.sha256_), &sha256_);
1589     }
1590
1591     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1592         LDID_SHA1_Update(&sha1_, data, size);
1593         LDID_SHA256_Update(&sha256_, data, size);
1594         return size;
1595     }
1596
1597     virtual int_type overflow(int_type next) {
1598         if (next == traits_type::eof())
1599             return sync();
1600         char value(next);
1601         xsputn(&value, 1);
1602         return next;
1603     }
1604 };
1605
1606 class HashProxy :
1607     public HashBuffer
1608 {
1609   private:
1610     std::streambuf &buffer_;
1611
1612   public:
1613     HashProxy(ldid::Hash &hash, std::streambuf &buffer) :
1614         HashBuffer(hash),
1615         buffer_(buffer)
1616     {
1617     }
1618
1619     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1620         _assert(HashBuffer::xsputn(data, size) == size);
1621         return buffer_.sputn(data, size);
1622     }
1623 };
1624
1625 #ifndef LDID_NOTOOLS
1626 static bool Starts(const std::string &lhs, const std::string &rhs) {
1627     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1628 }
1629
1630 class Split {
1631   public:
1632     std::string dir;
1633     std::string base;
1634
1635     Split(const std::string &path) {
1636         size_t slash(path.rfind('/'));
1637         if (slash == std::string::npos)
1638             base = path;
1639         else {
1640             dir = path.substr(0, slash + 1);
1641             base = path.substr(slash + 1);
1642         }
1643     }
1644 };
1645
1646 static void mkdir_p(const std::string &path) {
1647     if (path.empty())
1648         return;
1649 #ifdef __WIN32__
1650     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1651         return;
1652 #else
1653     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1654         return;
1655 #endif
1656     auto slash(path.rfind('/', path.size() - 1));
1657     if (slash == std::string::npos)
1658         return;
1659     mkdir_p(path.substr(0, slash));
1660 }
1661
1662 static std::string Temporary(std::filebuf &file, const Split &split) {
1663     std::string temp(split.dir + ".ldid." + split.base);
1664     mkdir_p(split.dir);
1665     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1666     return temp;
1667 }
1668
1669 static void Commit(const std::string &path, const std::string &temp) {
1670     struct stat info;
1671     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1672 #ifndef __WIN32__
1673         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1674 #endif
1675         _syscall(chmod(temp.c_str(), info.st_mode));
1676     }
1677
1678     _syscall(rename(temp.c_str(), path.c_str()));
1679 }
1680 #endif
1681
1682 namespace ldid {
1683
1684 static void get(std::string &value, X509_NAME *name, int nid) {
1685     auto index(X509_NAME_get_index_by_NID(name, nid, -1));
1686     _assert(index >= 0);
1687     auto next(X509_NAME_get_index_by_NID(name, nid, index));
1688     _assert(next == -1);
1689     auto entry(X509_NAME_get_entry(name, index));
1690     _assert(entry != NULL);
1691     auto asn(X509_NAME_ENTRY_get_data(entry));
1692     _assert(asn != NULL);
1693     value.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1694 }
1695
1696 static void req(std::streambuf &buffer, uint32_t value) {
1697     value = Swap(value);
1698     put(buffer, &value, sizeof(value));
1699 }
1700
1701 static void req(std::streambuf &buffer, const std::string &value) {
1702     req(buffer, value.size());
1703     put(buffer, value.data(), value.size());
1704     static uint8_t zeros[] = {0,0,0,0};
1705     put(buffer, zeros, 3 - (value.size() + 3) % 4);
1706 }
1707
1708 template <size_t Size_>
1709 static void req(std::streambuf &buffer, uint8_t (&&data)[Size_]) {
1710     req(buffer, Size_);
1711     put(buffer, data, Size_);
1712     static uint8_t zeros[] = {0,0,0,0};
1713     put(buffer, zeros, 3 - (Size_ + 3) % 4);
1714 }
1715
1716 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) {
1717     Hash hash;
1718
1719
1720     std::string team;
1721     std::string common;
1722
1723 #ifndef LDID_NOSMIME
1724     if (!key.empty()) {
1725         Stuff stuff(key);
1726         auto name(X509_get_subject_name(stuff));
1727         _assert(name != NULL);
1728         get(team, name, NID_organizationalUnitName);
1729         get(common, name, NID_commonName);
1730     }
1731 #endif
1732
1733
1734     std::stringbuf backing;
1735
1736     if (!requirements.empty()) {
1737         put(backing, requirements.data(), requirements.size());
1738     } else {
1739         Blobs blobs;
1740
1741         std::stringbuf requirement;
1742         req(requirement, exprForm);
1743         req(requirement, opAnd);
1744         req(requirement, opIdent);
1745         req(requirement, identifier);
1746         req(requirement, opAnd);
1747         req(requirement, opAppleGenericAnchor);
1748         req(requirement, opAnd);
1749         req(requirement, opCertField);
1750         req(requirement, 0);
1751         req(requirement, "subject.CN");
1752         req(requirement, matchEqual);
1753         req(requirement, common);
1754         req(requirement, opCertGeneric);
1755         req(requirement, 1);
1756         req(requirement, (uint8_t []) {APPLE_EXTENSION_OID, 2, 1});
1757         req(requirement, matchExists);
1758         insert(blobs, 3, CSMAGIC_REQUIREMENT, requirement);
1759
1760         put(backing, CSMAGIC_REQUIREMENTS, blobs);
1761     }
1762
1763
1764     // XXX: this is just a "sufficiently large number"
1765     size_t certificate(0x3000);
1766
1767     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1768         size_t alloc(sizeof(struct SuperBlob));
1769
1770         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1771
1772         uint32_t special(0);
1773
1774         _foreach (slot, slots)
1775             special = std::max(special, slot.first);
1776
1777         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1778             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1779                 special = std::max(special, CSSLOT_INFOSLOT);
1780         }));
1781
1782         special = std::max(special, CSSLOT_REQUIREMENTS);
1783         alloc += sizeof(struct BlobIndex);
1784         alloc += backing.str().size();
1785
1786         if (!entitlements.empty()) {
1787             special = std::max(special, CSSLOT_ENTITLEMENTS);
1788             alloc += sizeof(struct BlobIndex);
1789             alloc += sizeof(struct Blob);
1790             alloc += entitlements.size();
1791         }
1792
1793         size_t directory(0);
1794
1795         directory += sizeof(struct BlobIndex);
1796         directory += sizeof(struct Blob);
1797         directory += sizeof(struct CodeDirectory);
1798         directory += identifier.size() + 1;
1799
1800         if (!team.empty())
1801             directory += team.size() + 1;
1802
1803         for (Algorithm *algorithm : GetAlgorithms())
1804             alloc = Align(alloc + directory + (special + normal) * algorithm->size_, 16);
1805
1806 #ifndef LDID_NOSMIME
1807         if (!key.empty()) {
1808             alloc += sizeof(struct BlobIndex);
1809             alloc += sizeof(struct Blob);
1810             alloc += certificate;
1811         }
1812 #endif
1813
1814         return alloc;
1815     }), 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 {
1816         Blobs blobs;
1817
1818         if (true) {
1819             insert(blobs, CSSLOT_REQUIREMENTS, backing);
1820         }
1821
1822         if (!entitlements.empty()) {
1823             std::stringbuf data;
1824             put(data, entitlements.data(), entitlements.size());
1825             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1826         }
1827
1828         Slots posts(slots);
1829
1830         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1831             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0) {
1832                 auto &slot(posts[CSSLOT_INFOSLOT]);
1833                 for (Algorithm *algorithm : GetAlgorithms())
1834                     (*algorithm)(slot, data, size);
1835             }
1836         }));
1837
1838         unsigned total(0);
1839         for (Algorithm *pointer : GetAlgorithms()) {
1840             Algorithm &algorithm(*pointer);
1841
1842             std::stringbuf data;
1843
1844             uint32_t special(0);
1845             _foreach (blob, blobs)
1846                 special = std::max(special, blob.first);
1847             _foreach (slot, posts)
1848                 special = std::max(special, slot.first);
1849             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1850
1851             CodeDirectory directory;
1852             directory.version = Swap(uint32_t(0x00020200));
1853             directory.flags = Swap(uint32_t(0));
1854             directory.nSpecialSlots = Swap(special);
1855             directory.codeLimit = Swap(uint32_t(limit));
1856             directory.nCodeSlots = Swap(normal);
1857             directory.hashSize = algorithm.size_;
1858             directory.hashType = algorithm.type_;
1859             directory.spare1 = 0x00;
1860             directory.pageSize = PageShift_;
1861             directory.spare2 = Swap(uint32_t(0));
1862             directory.scatterOffset = Swap(uint32_t(0));
1863             //directory.spare3 = Swap(uint32_t(0));
1864             //directory.codeLimit64 = Swap(uint64_t(0));
1865
1866             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1867
1868             directory.identOffset = Swap(uint32_t(offset));
1869             offset += identifier.size() + 1;
1870
1871             if (team.empty())
1872                 directory.teamIDOffset = Swap(uint32_t(0));
1873             else {
1874                 directory.teamIDOffset = Swap(uint32_t(offset));
1875                 offset += team.size() + 1;
1876             }
1877
1878             offset += special * algorithm.size_;
1879             directory.hashOffset = Swap(uint32_t(offset));
1880             offset += normal * algorithm.size_;
1881
1882             put(data, &directory, sizeof(directory));
1883
1884             put(data, identifier.c_str(), identifier.size() + 1);
1885             if (!team.empty())
1886                 put(data, team.c_str(), team.size() + 1);
1887
1888             std::vector<uint8_t> storage((special + normal) * algorithm.size_);
1889             auto *hashes(&storage[special * algorithm.size_]);
1890
1891             memset(storage.data(), 0, special * algorithm.size_);
1892
1893             _foreach (blob, blobs) {
1894                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1895                 algorithm(hashes - blob.first * algorithm.size_, local, Swap(local->length));
1896             }
1897
1898             _foreach (slot, posts)
1899                 memcpy(hashes - slot.first * algorithm.size_, algorithm[slot.second], algorithm.size_);
1900
1901             percent(0);
1902             if (normal != 1)
1903                 for (size_t i = 0; i != normal - 1; ++i) {
1904                     algorithm(hashes + i * algorithm.size_, (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1905                     percent(double(i) / normal);
1906                 }
1907             if (normal != 0)
1908                 algorithm(hashes + (normal - 1) * algorithm.size_, top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1909             percent(1);
1910
1911             put(data, storage.data(), storage.size());
1912
1913             const auto &save(insert(blobs, total == 0 ? CSSLOT_CODEDIRECTORY : CSSLOT_ALTERNATE + total - 1, CSMAGIC_CODEDIRECTORY, data));
1914             algorithm(hash, save.data(), save.size());
1915
1916             ++total;
1917         }
1918
1919 #ifndef LDID_NOSMIME
1920         if (!key.empty()) {
1921             auto plist(plist_new_dict());
1922             _scope({ plist_free(plist); });
1923
1924             auto cdhashes(plist_new_array());
1925             plist_dict_set_item(plist, "cdhashes", cdhashes);
1926
1927             unsigned total(0);
1928             for (Algorithm *pointer : GetAlgorithms()) {
1929                 Algorithm &algorithm(*pointer);
1930                 (void) algorithm;
1931
1932                 const auto &blob(blobs[total == 0 ? CSSLOT_CODEDIRECTORY : CSSLOT_ALTERNATE + total - 1]);
1933                 ++total;
1934
1935                 std::vector<char> hash;
1936                 algorithm(hash, blob.data(), blob.size());
1937                 hash.resize(20);
1938
1939                 plist_array_append_item(cdhashes, plist_new_data(hash.data(), hash.size()));
1940             }
1941
1942             char *xml(NULL);
1943             uint32_t size;
1944             plist_to_xml(plist, &xml, &size);
1945             _scope({ free(xml); });
1946
1947             std::stringbuf data;
1948             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1949
1950             Stuff stuff(key);
1951             Buffer bio(sign);
1952
1953             Signature signature(stuff, sign, std::string(xml, size));
1954             Buffer result(signature);
1955             std::string value(result);
1956             put(data, value.data(), value.size());
1957
1958             const auto &save(insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data));
1959             _assert(save.size() <= certificate);
1960         }
1961 #endif
1962
1963         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1964     }), percent);
1965
1966     return hash;
1967 }
1968
1969 #ifndef LDID_NOTOOLS
1970 static void Unsign(void *idata, size_t isize, std::streambuf &output, const Functor<void (double)> &percent) {
1971     Allocate(idata, isize, output, fun([](const MachHeader &mach_header, size_t size) -> size_t {
1972         return 0;
1973     }), 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 {
1974         return 0;
1975     }), percent);
1976 }
1977
1978 std::string DiskFolder::Path(const std::string &path) const {
1979     return path_ + "/" + path;
1980 }
1981
1982 DiskFolder::DiskFolder(const std::string &path) :
1983     path_(path)
1984 {
1985 }
1986
1987 DiskFolder::~DiskFolder() {
1988     if (!std::uncaught_exception())
1989         for (const auto &commit : commit_)
1990             Commit(commit.first, commit.second);
1991 }
1992
1993 #ifndef __WIN32__
1994 std::string readlink(const std::string &path) {
1995     for (size_t size(1024); ; size *= 2) {
1996         std::string data;
1997         data.resize(size);
1998
1999         int writ(_syscall(::readlink(path.c_str(), &data[0], data.size())));
2000         if (size_t(writ) >= size)
2001             continue;
2002
2003         data.resize(writ);
2004         return data;
2005     }
2006 }
2007 #endif
2008
2009 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 {
2010     std::string path(Path(root) + base);
2011
2012     DIR *dir(opendir(path.c_str()));
2013     _assert(dir != NULL);
2014     _scope({ _syscall(closedir(dir)); });
2015
2016     while (auto child = readdir(dir)) {
2017         std::string name(child->d_name);
2018         if (name == "." || name == "..")
2019             continue;
2020         if (Starts(name, ".ldid."))
2021             continue;
2022
2023         bool directory;
2024
2025 #ifdef __WIN32__
2026         struct stat info;
2027         _syscall(stat((path + name).c_str(), &info));
2028         if (false);
2029         else if (S_ISDIR(info.st_mode))
2030             directory = true;
2031         else if (S_ISREG(info.st_mode))
2032             directory = false;
2033         else
2034             _assert_(false, "st_mode=%x", info.st_mode);
2035 #else
2036         switch (child->d_type) {
2037             case DT_DIR:
2038                 directory = true;
2039                 break;
2040             case DT_REG:
2041                 directory = false;
2042                 break;
2043             case DT_LNK:
2044                 link(base + name, fun([&]() { return readlink(path + name); }));
2045                 continue;
2046             default:
2047                 _assert_(false, "d_type=%u", child->d_type);
2048         }
2049 #endif
2050
2051         if (directory)
2052             Find(root, base + name + "/", code, link);
2053         else
2054             code(base + name);
2055     }
2056 }
2057
2058 void DiskFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2059     if (!edit) {
2060         // XXX: use nullbuf
2061         std::stringbuf save;
2062         code(save);
2063     } else {
2064         std::filebuf save;
2065         auto from(Path(path));
2066         commit_[from] = Temporary(save, from);
2067         code(save);
2068     }
2069 }
2070
2071 bool DiskFolder::Look(const std::string &path) const {
2072     return _syscall(access(Path(path).c_str(), R_OK), ENOENT) == 0;
2073 }
2074
2075 void DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2076     std::filebuf data;
2077     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
2078     _assert_(result == &data, "DiskFolder::Open(%s)", path.c_str());
2079
2080     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2081     data.pubseekpos(0, std::ios::in);
2082     code(data, length, NULL);
2083 }
2084
2085 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 {
2086     Find(path, "", code, link);
2087 }
2088 #endif
2089
2090 SubFolder::SubFolder(Folder &parent, const std::string &path) :
2091     parent_(parent),
2092     path_(path)
2093 {
2094 }
2095
2096 void SubFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2097     return parent_.Save(path_ + path, edit, flag, code);
2098 }
2099
2100 bool SubFolder::Look(const std::string &path) const {
2101     return parent_.Look(path_ + path);
2102 }
2103
2104 void SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2105     return parent_.Open(path_ + path, code);
2106 }
2107
2108 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 {
2109     return parent_.Find(path_ + path, code, link);
2110 }
2111
2112 std::string UnionFolder::Map(const std::string &path) const {
2113     auto remap(remaps_.find(path));
2114     if (remap == remaps_.end())
2115         return path;
2116     return remap->second;
2117 }
2118
2119 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 {
2120     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
2121         code(file.substr(path.size()));
2122 }
2123
2124 UnionFolder::UnionFolder(Folder &parent) :
2125     parent_(parent)
2126 {
2127 }
2128
2129 void UnionFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2130     return parent_.Save(Map(path), edit, flag, code);
2131 }
2132
2133 bool UnionFolder::Look(const std::string &path) const {
2134     auto file(resets_.find(path));
2135     if (file != resets_.end())
2136         return true;
2137     return parent_.Look(Map(path));
2138 }
2139
2140 void UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2141     auto file(resets_.find(path));
2142     if (file == resets_.end())
2143         return parent_.Open(Map(path), code);
2144     auto &entry(file->second);
2145
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 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 {
2153     for (auto &reset : resets_)
2154         Map(path, code, reset.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
2155             auto &entry(reset.second);
2156             auto &data(*entry.data_);
2157             auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2158             data.pubseekpos(0, std::ios::in);
2159             code(data, length, entry.flag_);
2160         }));
2161
2162     for (auto &remap : remaps_)
2163         Map(path, code, remap.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
2164             parent_.Open(remap.second, fun([&](std::streambuf &data, size_t length, const void *flag) {
2165                 code(data, length, flag);
2166             }));
2167         }));
2168
2169     parent_.Find(path, fun([&](const std::string &name) {
2170         if (deletes_.find(path + name) == deletes_.end())
2171             code(name);
2172     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2173         if (deletes_.find(path + name) == deletes_.end())
2174             link(name, read);
2175     }));
2176 }
2177
2178 #ifndef LDID_NOTOOLS
2179 static void copy(std::streambuf &source, std::streambuf &target, size_t length, const ldid::Functor<void (double)> &percent) {
2180     percent(0);
2181     size_t total(0);
2182     for (;;) {
2183         char data[4096 * 4];
2184         size_t writ(source.sgetn(data, sizeof(data)));
2185         if (writ == 0)
2186             break;
2187         _assert(target.sputn(data, writ) == writ);
2188         total += writ;
2189         percent(double(total) / length);
2190     }
2191 }
2192
2193 #ifndef LDID_NOPLIST
2194 static plist_t plist(const std::string &data) {
2195     plist_t plist(NULL);
2196     if (Starts(data, "bplist00"))
2197         plist_from_bin(data.data(), data.size(), &plist);
2198     else
2199         plist_from_xml(data.data(), data.size(), &plist);
2200     _assert(plist != NULL);
2201     return plist;
2202 }
2203
2204 static void plist_d(std::streambuf &buffer, size_t length, const Functor<void (plist_t)> &code) {
2205     std::stringbuf data;
2206     copy(buffer, data, length, ldid::fun(dummy));
2207     auto node(plist(data.str()));
2208     _scope({ plist_free(node); });
2209     _assert(plist_get_node_type(node) == PLIST_DICT);
2210     code(node);
2211 }
2212
2213 static std::string plist_s(plist_t node) {
2214     _assert(node != NULL);
2215     _assert(plist_get_node_type(node) == PLIST_STRING);
2216     char *data;
2217     plist_get_string_val(node, &data);
2218     _scope({ free(data); });
2219     return data;
2220 }
2221 #endif
2222
2223 enum Mode {
2224     NoMode,
2225     OptionalMode,
2226     OmitMode,
2227     NestedMode,
2228     TopMode,
2229 };
2230
2231 class Expression {
2232   private:
2233     regex_t regex_;
2234     std::vector<std::string> matches_;
2235
2236   public:
2237     Expression(const std::string &code) {
2238         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED) == 0, "regcomp()");
2239         matches_.resize(regex_.re_nsub + 1);
2240     }
2241
2242     ~Expression() {
2243         regfree(&regex_);
2244     }
2245
2246     bool operator ()(const std::string &data) {
2247         regmatch_t matches[matches_.size()];
2248         auto value(regexec(&regex_, data.c_str(), matches_.size(), matches, 0));
2249         if (value == REG_NOMATCH)
2250             return false;
2251         _assert_(value == 0, "regexec()");
2252         for (size_t i(0); i != matches_.size(); ++i)
2253             matches_[i].assign(data.data() + matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so);
2254         return true;
2255     }
2256
2257     const std::string &operator [](size_t index) const {
2258         return matches_[index];
2259     }
2260 };
2261
2262 struct Rule {
2263     unsigned weight_;
2264     Mode mode_;
2265     std::string code_;
2266
2267     mutable std::auto_ptr<Expression> regex_;
2268
2269     Rule(unsigned weight, Mode mode, const std::string &code) :
2270         weight_(weight),
2271         mode_(mode),
2272         code_(code)
2273     {
2274     }
2275
2276     Rule(const Rule &rhs) :
2277         weight_(rhs.weight_),
2278         mode_(rhs.mode_),
2279         code_(rhs.code_)
2280     {
2281     }
2282
2283     void Compile() const {
2284         regex_.reset(new Expression(code_));
2285     }
2286
2287     bool operator ()(const std::string &data) const {
2288         _assert(regex_.get() != NULL);
2289         return (*regex_)(data);
2290     }
2291
2292     bool operator <(const Rule &rhs) const {
2293         if (weight_ > rhs.weight_)
2294             return true;
2295         if (weight_ < rhs.weight_)
2296             return false;
2297         return mode_ > rhs.mode_;
2298     }
2299 };
2300
2301 struct RuleCode {
2302     bool operator ()(const Rule *lhs, const Rule *rhs) const {
2303         return lhs->code_ < rhs->code_;
2304     }
2305 };
2306
2307 #ifndef LDID_NOPLIST
2308 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) {
2309     // XXX: this is a miserable fail
2310     std::stringbuf temp;
2311     put(temp, prefix, size);
2312     copy(buffer, temp, length - size, percent);
2313     // XXX: this is a stupid hack
2314     pad(temp, 0x10 - (length & 0xf));
2315     auto data(temp.str());
2316
2317     HashProxy proxy(hash, save);
2318     return Sign(data.data(), data.size(), proxy, identifier, entitlements, requirements, key, slots, percent);
2319 }
2320
2321 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) {
2322     std::string executable;
2323     std::string identifier;
2324
2325     bool mac(false);
2326
2327     std::string info("Info.plist");
2328     if (!folder.Look(info) && folder.Look("Resources/" + info)) {
2329         mac = true;
2330         info = "Resources/" + info;
2331     }
2332
2333     folder.Open(info, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2334         plist_d(buffer, length, fun([&](plist_t node) {
2335             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
2336             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
2337         }));
2338     }));
2339
2340     if (!mac && folder.Look("MacOS/" + executable)) {
2341         executable = "MacOS/" + executable;
2342         mac = true;
2343     }
2344
2345     std::string entitlements;
2346     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2347         // XXX: this is a miserable fail
2348         std::stringbuf temp;
2349         copy(buffer, temp, length, percent);
2350         // XXX: this is a stupid hack
2351         pad(temp, 0x10 - (length & 0xf));
2352         auto data(temp.str());
2353         entitlements = alter(root, Analyze(data.data(), data.size()));
2354     }));
2355
2356     static const std::string directory("_CodeSignature/");
2357     static const std::string signature(directory + "CodeResources");
2358
2359     std::map<std::string, std::multiset<Rule>> versions;
2360
2361     auto &rules1(versions[""]);
2362     auto &rules2(versions["2"]);
2363
2364     const std::string resources(mac ? "Resources/" : "");
2365
2366     if (true) {
2367         rules1.insert(Rule{1, NoMode, "^" + resources});
2368         rules1.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2369         rules1.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2370         rules1.insert(Rule{1010, NoMode, "^Base\\.lproj/"});
2371         rules1.insert(Rule{1, NoMode, "^version.plist$"});
2372     }
2373
2374     if (true) {
2375         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
2376         rules2.insert(Rule{20, NoMode, "^" + resources});
2377         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
2378         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
2379         rules2.insert(Rule{1, NoMode, "^.*"});
2380         rules2.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2381         rules2.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2382         rules2.insert(Rule{1010, NoMode, "^Base\\.lproj/"});
2383         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
2384         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
2385         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
2386         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
2387         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
2388     }
2389
2390     std::map<std::string, Hash> local;
2391
2392     std::string failure(mac ? "Contents/|Versions/[^/]*/Resources/" : "");
2393     Expression nested("^(Frameworks/[^/]*\\.framework|PlugIns/[^/]*\\.appex(()|/[^/]*.app))/(" + failure + ")Info\\.plist$");
2394     std::map<std::string, Bundle> bundles;
2395
2396     folder.Find("", fun([&](const std::string &name) {
2397         if (!nested(name))
2398             return;
2399         auto bundle(root + Split(name).dir);
2400         bundle.resize(bundle.size() - resources.size());
2401         SubFolder subfolder(folder, bundle);
2402
2403         bundles[nested[1]] = Sign(bundle, subfolder, key, local, "", Starts(name, "PlugIns/") ? alter :
2404             static_cast<const Functor<std::string (const std::string &, const std::string &)> &>(fun([&](const std::string &, const std::string &entitlements) -> std::string { return entitlements; }))
2405         , progress, percent);
2406     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2407     }));
2408
2409     std::set<std::string> excludes;
2410
2411     auto exclude([&](const std::string &name) {
2412         // BundleDiskRep::adjustResources -> builder.addExclusion
2413         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
2414             return true;
2415
2416         for (const auto &bundle : bundles)
2417             if (Starts(name, bundle.first + "/")) {
2418                 excludes.insert(name);
2419                 return true;
2420             }
2421
2422         return false;
2423     });
2424
2425     std::map<std::string, std::string> links;
2426
2427     folder.Find("", fun([&](const std::string &name) {
2428         if (exclude(name))
2429             return;
2430
2431         if (local.find(name) != local.end())
2432             return;
2433         auto &hash(local[name]);
2434
2435         folder.Open(name, fun([&](std::streambuf &data, size_t length, const void *flag) {
2436             progress(root + name);
2437
2438             union {
2439                 struct {
2440                     uint32_t magic;
2441                     uint32_t count;
2442                 };
2443
2444                 uint8_t bytes[8];
2445             } header;
2446
2447             auto size(most(data, &header.bytes, sizeof(header.bytes)));
2448
2449             if (name != "_WatchKitStub/WK" && size == sizeof(header.bytes))
2450                 switch (Swap(header.magic)) {
2451                     case FAT_MAGIC:
2452                         // Java class file format
2453                         if (Swap(header.count) >= 40)
2454                             break;
2455                     case FAT_CIGAM:
2456                     case MH_MAGIC: case MH_MAGIC_64:
2457                     case MH_CIGAM: case MH_CIGAM_64:
2458                         folder.Save(name, true, flag, fun([&](std::streambuf &save) {
2459                             Slots slots;
2460                             Sign(header.bytes, size, data, hash, save, identifier, "", "", key, slots, length, percent);
2461                         }));
2462                         return;
2463                 }
2464
2465             folder.Save(name, false, flag, fun([&](std::streambuf &save) {
2466                 HashProxy proxy(hash, save);
2467                 put(proxy, header.bytes, size);
2468                 copy(data, proxy, length - size, percent);
2469             }));
2470         }));
2471     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2472         if (exclude(name))
2473             return;
2474
2475         links[name] = read();
2476     }));
2477
2478     auto plist(plist_new_dict());
2479     _scope({ plist_free(plist); });
2480
2481     for (const auto &version : versions) {
2482         auto files(plist_new_dict());
2483         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2484
2485         for (const auto &rule : version.second)
2486             rule.Compile();
2487
2488         bool old(&version.second == &rules1);
2489
2490         for (const auto &hash : local)
2491             for (const auto &rule : version.second)
2492                 if (rule(hash.first)) {
2493                     if (!old && mac && excludes.find(hash.first) != excludes.end());
2494                     else if (old && rule.mode_ == NoMode)
2495                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2496                     else if (rule.mode_ != OmitMode) {
2497                         auto entry(plist_new_dict());
2498                         plist_dict_set_item(entry, "hash", plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2499                         if (!old)
2500                             plist_dict_set_item(entry, "hash2", plist_new_data(reinterpret_cast<const char *>(hash.second.sha256_), sizeof(hash.second.sha256_)));
2501                         if (rule.mode_ == OptionalMode)
2502                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2503                         plist_dict_set_item(files, hash.first.c_str(), entry);
2504                     }
2505
2506                     break;
2507                 }
2508
2509         for (const auto &link : links)
2510             for (const auto &rule : version.second)
2511                 if (rule(link.first)) {
2512                     if (rule.mode_ != OmitMode) {
2513                         auto entry(plist_new_dict());
2514                         plist_dict_set_item(entry, "symlink", plist_new_string(link.second.c_str()));
2515                         if (rule.mode_ == OptionalMode)
2516                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2517                         plist_dict_set_item(files, link.first.c_str(), entry);
2518                     }
2519
2520                     break;
2521                 }
2522
2523         if (!old && mac)
2524             for (const auto &bundle : bundles) {
2525                 auto entry(plist_new_dict());
2526                 plist_dict_set_item(entry, "cdhash", plist_new_data(reinterpret_cast<const char *>(bundle.second.hash.sha256_), sizeof(bundle.second.hash.sha256_)));
2527                 plist_dict_set_item(entry, "requirement", plist_new_string("anchor apple generic"));
2528                 plist_dict_set_item(files, bundle.first.c_str(), entry);
2529             }
2530     }
2531
2532     for (const auto &version : versions) {
2533         auto rules(plist_new_dict());
2534         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2535
2536         std::multiset<const Rule *, RuleCode> ordered;
2537         for (const auto &rule : version.second)
2538             ordered.insert(&rule);
2539
2540         for (const auto &rule : ordered)
2541             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2542                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2543             else {
2544                 auto entry(plist_new_dict());
2545                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2546
2547                 switch (rule->mode_) {
2548                     case NoMode:
2549                         break;
2550                     case OmitMode:
2551                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2552                         break;
2553                     case OptionalMode:
2554                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2555                         break;
2556                     case NestedMode:
2557                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2558                         break;
2559                     case TopMode:
2560                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2561                         break;
2562                 }
2563
2564                 if (rule->weight_ >= 10000)
2565                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2566                 else if (rule->weight_ != 1)
2567                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2568             }
2569     }
2570
2571     folder.Save(signature, true, NULL, fun([&](std::streambuf &save) {
2572         HashProxy proxy(local[signature], save);
2573         char *xml(NULL);
2574         uint32_t size;
2575         plist_to_xml(plist, &xml, &size);
2576         _scope({ free(xml); });
2577         put(proxy, xml, size);
2578     }));
2579
2580     Bundle bundle;
2581     bundle.path = executable;
2582
2583     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2584         progress(root + executable);
2585         folder.Save(executable, true, flag, fun([&](std::streambuf &save) {
2586             Slots slots;
2587             slots[1] = local.at(info);
2588             slots[3] = local.at(signature);
2589             bundle.hash = Sign(NULL, 0, buffer, local[executable], save, identifier, entitlements, requirements, key, slots, length, percent);
2590         }));
2591     }));
2592
2593     for (const auto &entry : local)
2594         remote[root + entry.first] = entry.second;
2595
2596     return bundle;
2597 }
2598
2599 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) {
2600     std::map<std::string, Hash> local;
2601     return Sign(root, folder, key, local, requirements, alter, progress, percent);
2602 }
2603 #endif
2604
2605 #endif
2606 }
2607
2608 #ifndef LDID_NOTOOLS
2609 int main(int argc, char *argv[]) {
2610 #ifndef LDID_NOSMIME
2611     OpenSSL_add_all_algorithms();
2612 #endif
2613
2614     union {
2615         uint16_t word;
2616         uint8_t byte[2];
2617     } endian = {1};
2618
2619     little_ = endian.byte[0];
2620
2621     bool flag_r(false);
2622     bool flag_e(false);
2623     bool flag_q(false);
2624
2625 #ifndef LDID_NOFLAGT
2626     bool flag_T(false);
2627 #endif
2628
2629     bool flag_S(false);
2630     bool flag_s(false);
2631
2632     bool flag_D(false);
2633
2634     bool flag_A(false);
2635     bool flag_a(false);
2636
2637     bool flag_u(false);
2638
2639     uint32_t flag_CPUType(_not(uint32_t));
2640     uint32_t flag_CPUSubtype(_not(uint32_t));
2641
2642     const char *flag_I(NULL);
2643
2644 #ifndef LDID_NOFLAGT
2645     bool timeh(false);
2646     uint32_t timev(0);
2647 #endif
2648
2649     Map entitlements;
2650     Map requirements;
2651     Map key;
2652     ldid::Slots slots;
2653
2654     std::vector<std::string> files;
2655
2656     if (argc == 1) {
2657         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2658         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2659         fprintf(stderr, "   %s -S cat\n", argv[0]);
2660         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2661         exit(0);
2662     }
2663
2664     for (int argi(1); argi != argc; ++argi)
2665         if (argv[argi][0] != '-')
2666             files.push_back(argv[argi]);
2667         else switch (argv[argi][1]) {
2668             case 'r':
2669                 _assert(!flag_s);
2670                 _assert(!flag_S);
2671                 flag_r = true;
2672             break;
2673
2674             case 'e': flag_e = true; break;
2675
2676             case 'E': {
2677                 const char *string = argv[argi] + 2;
2678                 const char *colon = strchr(string, ':');
2679                 _assert(colon != NULL);
2680                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2681                 char *arge;
2682                 unsigned number(strtoul(string, &arge, 0));
2683                 _assert(arge == colon);
2684                 auto &slot(slots[number]);
2685                 for (Algorithm *algorithm : GetAlgorithms())
2686                     (*algorithm)(slot, file.data(), file.size());
2687             } break;
2688
2689             case 'q': flag_q = true; break;
2690
2691             case 'Q': {
2692                 const char *xml = argv[argi] + 2;
2693                 requirements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2694             } break;
2695
2696             case 'D': flag_D = true; break;
2697
2698             case 'a': flag_a = true; break;
2699
2700             case 'A':
2701                 _assert(!flag_A);
2702                 flag_A = true;
2703                 if (argv[argi][2] != '\0') {
2704                     const char *cpu = argv[argi] + 2;
2705                     const char *colon = strchr(cpu, ':');
2706                     _assert(colon != NULL);
2707                     char *arge;
2708                     flag_CPUType = strtoul(cpu, &arge, 0);
2709                     _assert(arge == colon);
2710                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2711                     _assert(arge == argv[argi] + strlen(argv[argi]));
2712                 }
2713             break;
2714
2715             case 's':
2716                 _assert(!flag_r);
2717                 _assert(!flag_S);
2718                 flag_s = true;
2719             break;
2720
2721             case 'S':
2722                 _assert(!flag_r);
2723                 _assert(!flag_s);
2724                 flag_S = true;
2725                 if (argv[argi][2] != '\0') {
2726                     const char *xml = argv[argi] + 2;
2727                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2728                 }
2729             break;
2730
2731             case 'K':
2732                 if (argv[argi][2] != '\0')
2733                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2734             break;
2735
2736 #ifndef LDID_NOFLAGT
2737             case 'T': {
2738                 flag_T = true;
2739                 if (argv[argi][2] == '-')
2740                     timeh = true;
2741                 else {
2742                     char *arge;
2743                     timev = strtoul(argv[argi] + 2, &arge, 0);
2744                     _assert(arge == argv[argi] + strlen(argv[argi]));
2745                 }
2746             } break;
2747 #endif
2748
2749             case 'u': {
2750                 flag_u = true;
2751             } break;
2752
2753             case 'I': {
2754                 flag_I = argv[argi] + 2;
2755             } break;
2756
2757             default:
2758                 goto usage;
2759             break;
2760         }
2761
2762     _assert(flag_S || key.empty());
2763     _assert(flag_S || flag_I == NULL);
2764
2765     if (files.empty()) usage: {
2766         exit(0);
2767     }
2768
2769     size_t filei(0), filee(0);
2770     _foreach (file, files) try {
2771         std::string path(file);
2772
2773         struct stat info;
2774         _syscall(stat(path.c_str(), &info));
2775
2776         if (S_ISDIR(info.st_mode)) {
2777 #ifndef LDID_NOPLIST
2778             _assert(!flag_r);
2779             ldid::DiskFolder folder(path);
2780             path += "/" + Sign("", folder, key, requirements, ldid::fun([&](const std::string &, const std::string &) -> std::string { return entitlements; })
2781                 , ldid::fun([&](const std::string &) {}), ldid::fun(dummy)
2782             ).path;
2783 #else
2784             _assert(false);
2785 #endif
2786         } else if (flag_S || flag_r) {
2787             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2788
2789             std::filebuf output;
2790             Split split(path);
2791             auto temp(Temporary(output, split));
2792
2793             if (flag_r)
2794                 ldid::Unsign(input.data(), input.size(), output, ldid::fun(dummy));
2795             else {
2796                 std::string identifier(flag_I ?: split.base.c_str());
2797                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, requirements, key, slots, ldid::fun(dummy));
2798             }
2799
2800             Commit(path, temp);
2801         }
2802
2803         bool modify(false);
2804 #ifndef LDID_NOFLAGT
2805         if (flag_T)
2806             modify = true;
2807 #endif
2808         if (flag_s)
2809             modify = true;
2810
2811         Map mapping(path, modify);
2812         FatHeader fat_header(mapping.data(), mapping.size());
2813
2814         _foreach (mach_header, fat_header.GetMachHeaders()) {
2815             struct linkedit_data_command *signature(NULL);
2816             struct encryption_info_command *encryption(NULL);
2817
2818             if (flag_A) {
2819                 if (mach_header.GetCPUType() != flag_CPUType)
2820                     continue;
2821                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2822                     continue;
2823             }
2824
2825             if (flag_a)
2826                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2827
2828             _foreach (load_command, mach_header.GetLoadCommands()) {
2829                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2830
2831                 if (false);
2832                 else if (cmd == LC_CODE_SIGNATURE)
2833                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2834                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2835                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2836                 else if (cmd == LC_LOAD_DYLIB) {
2837                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2838                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2839
2840                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2841                         if (flag_u) {
2842                             Version version;
2843                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2844                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2845                         }
2846                     }
2847                 }
2848 #ifndef LDID_NOFLAGT
2849                 else if (cmd == LC_ID_DYLIB) {
2850                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2851
2852                     if (flag_T) {
2853                         uint32_t timed;
2854
2855                         if (!timeh)
2856                             timed = timev;
2857                         else {
2858                             dylib_command->dylib.timestamp = 0;
2859                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2860                         }
2861
2862                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2863                     }
2864                 }
2865 #endif
2866             }
2867
2868             if (flag_D) {
2869                 _assert(encryption != NULL);
2870                 encryption->cryptid = mach_header.Swap(0);
2871             }
2872
2873             if (flag_e) {
2874                 _assert(signature != NULL);
2875
2876                 uint32_t data = mach_header.Swap(signature->dataoff);
2877
2878                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2879                 uint8_t *blob = top + data;
2880                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2881
2882                 for (size_t index(0); index != Swap(super->count); ++index)
2883                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2884                         uint32_t begin = Swap(super->index[index].offset);
2885                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2886                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2887                     }
2888             }
2889
2890             if (flag_q) {
2891                 _assert(signature != NULL);
2892
2893                 uint32_t data = mach_header.Swap(signature->dataoff);
2894
2895                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2896                 uint8_t *blob = top + data;
2897                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2898
2899                 for (size_t index(0); index != Swap(super->count); ++index)
2900                     if (Swap(super->index[index].type) == CSSLOT_REQUIREMENTS) {
2901                         uint32_t begin = Swap(super->index[index].offset);
2902                         struct Blob *requirement = reinterpret_cast<struct Blob *>(blob + begin);
2903                         fwrite(requirement, 1, Swap(requirement->length), stdout);
2904                     }
2905             }
2906
2907             if (flag_s) {
2908                 _assert(signature != NULL);
2909
2910                 uint32_t data = mach_header.Swap(signature->dataoff);
2911
2912                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2913                 uint8_t *blob = top + data;
2914                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2915
2916                 for (size_t index(0); index != Swap(super->count); ++index)
2917                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2918                         uint32_t begin = Swap(super->index[index].offset);
2919                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin + sizeof(Blob));
2920
2921                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2922                         uint32_t pages = Swap(directory->nCodeSlots);
2923
2924                         if (pages != 1)
2925                             for (size_t i = 0; i != pages - 1; ++i)
2926                                 LDID_SHA1(top + PageSize_ * i, PageSize_, hashes[i]);
2927                         if (pages != 0)
2928                             LDID_SHA1(top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1, hashes[pages - 1]);
2929                     }
2930             }
2931         }
2932
2933         ++filei;
2934     } catch (const char *) {
2935         ++filee;
2936         ++filei;
2937     }
2938
2939     return filee;
2940 }
2941 #endif