ldid.cpp

   1 /* ldid - (Mach-O) Link-Loader Identity Editor
   2  * Copyright (C) 2007-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include <cstdio>
  23 #include <cstdlib>
  24 #include <cstring>
  25 #include <fstream>
  26 #include <iostream>
  27 #include <memory>
  28 #include <set>
  29 #include <sstream>
  30 #include <string>
  31 #include <vector>
  32
  33 #include <dirent.h>
  34 #include <errno.h>
  35 #include <fcntl.h>
  36 #include <regex.h>
  37 #include <stdbool.h>
  38 #include <stdint.h>
  39 #include <unistd.h>
  40
  41 #include <sys/mman.h>
  42 #include <sys/stat.h>
  43 #include <sys/types.h>
  44
  45 #ifndef LDID_NOSMIME
  46 #include <openssl/err.h>
  47 #include <openssl/pem.h>
  48 #include <openssl/pkcs7.h>
  49 #include <openssl/pkcs12.h>
  50 #endif
  51
  52 #ifdef __APPLE__
  53 #include <CommonCrypto/CommonDigest.h>
  54 #define LDID_SHA1_DIGEST_LENGTH CC_SHA1_DIGEST_LENGTH
  55 #define LDID_SHA1 CC_SHA1
  56 #define LDID_SHA1_CTX CC_SHA1_CTX
  57 #define LDID_SHA1_Init CC_SHA1_Init
  58 #define LDID_SHA1_Update CC_SHA1_Update
  59 #define LDID_SHA1_Final CC_SHA1_Final
  60 #else
  61 #include <openssl/sha.h>
  62 #define LDID_SHA1_DIGEST_LENGTH SHA_DIGEST_LENGTH
  63 #define LDID_SHA1 SHA1
  64 #define LDID_SHA1_CTX SHA_CTX
  65 #define LDID_SHA1_Init SHA1_Init
  66 #define LDID_SHA1_Update SHA1_Update
  67 #define LDID_SHA1_Final SHA1_Final
  68 #endif
  69
  70 #ifndef LDID_NOPLIST
  71 #include <plist/plist.h>
  72 #endif
  73
  74 #include "ldid.hpp"
  75
  76 #define _assert___(line) \
  77     #line
  78 #define _assert__(line) \
  79     _assert___(line)
  80
  81 #ifdef __EXCEPTIONS
  82 #define _assert_(expr, format, ...) \
  83     do if (!(expr)) { \
  84         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
  85         throw __FILE__ "(" _assert__(__LINE__) "): _assert(" #expr ")"; \
  86     } while (false)
  87 #else
  88 // XXX: this is not acceptable
  89 #define _assert_(expr, format, ...) \
  90     do if (!(expr)) { \
  91         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
  92         exit(-1); \
  93     } while (false)
  94 #endif
  95
  96 #define _assert(expr) \
  97     _assert_(expr, "%s", #expr)
  98
  99 #define _syscall(expr, ...) [&] { for (;;) { \
 100     auto _value(expr); \
 101     if ((long) _value != -1) \
 102         return _value; \
 103     int error(errno); \
 104     if (error == EINTR) \
 105         continue; \
 106     /* XXX: EINTR is included in this list to fix g++ */ \
 107     for (auto success : (long[]) {EINTR, __VA_ARGS__}) \
 108         if (error == success) \
 109             return (decltype(expr)) -success; \
 110     _assert_(false, "errno=%u", error); \
 111 } }()
 112
 113 #define _trace() \
 114     fprintf(stderr, "_trace(%s:%u): %s\n", __FILE__, __LINE__, __FUNCTION__)
 115
 116 #define _not(type) \
 117     ((type) ~ (type) 0)
 118
 119 #define _packed \
 120     __attribute__((packed))
 121
 122 template <typename Type_>
 123 struct Iterator_ {
 124     typedef typename Type_::const_iterator Result;
 125 };
 126
 127 #define _foreach(item, list) \
 128     for (bool _stop(true); _stop; ) \
 129         for (const __typeof__(list) &_list = (list); _stop; _stop = false) \
 130             for (Iterator_<__typeof__(list)>::Result _item = _list.begin(); _item != _list.end(); ++_item) \
 131                 for (bool _suck(true); _suck; _suck = false) \
 132                     for (const __typeof__(*_item) &item = *_item; _suck; _suck = false)
 133
 134 class _Scope {
 135 };
 136
 137 template <typename Function_>
 138 class Scope :
 139     public _Scope
 140 {
 141   private:
 142     Function_ function_;
 143
 144   public:
 145     Scope(const Function_ &function) :
 146         function_(function)
 147     {
 148     }
 149
 150     ~Scope() {
 151         function_();
 152     }
 153 };
 154
 155 template <typename Function_>
 156 Scope<Function_> _scope(const Function_ &function) {
 157     return Scope<Function_>(function);
 158 }
 159
 160 #define _scope__(counter, function) \
 161     __attribute__((__unused__)) \
 162     const _Scope &_scope ## counter(_scope([&]function))
 163 #define _scope_(counter, function) \
 164     _scope__(counter, function)
 165 #define _scope(function) \
 166     _scope_(__COUNTER__, function)
 167
 168 #define CPU_ARCH_MASK  uint32_t(0xff000000)
 169 #define CPU_ARCH_ABI64 uint32_t(0x01000000)
 170
 171 #define CPU_TYPE_ANY     uint32_t(-1)
 172 #define CPU_TYPE_VAX     uint32_t( 1)
 173 #define CPU_TYPE_MC680x0 uint32_t( 6)
 174 #define CPU_TYPE_X86     uint32_t( 7)
 175 #define CPU_TYPE_MC98000 uint32_t(10)
 176 #define CPU_TYPE_HPPA    uint32_t(11)
 177 #define CPU_TYPE_ARM     uint32_t(12)
 178 #define CPU_TYPE_MC88000 uint32_t(13)
 179 #define CPU_TYPE_SPARC   uint32_t(14)
 180 #define CPU_TYPE_I860    uint32_t(15)
 181 #define CPU_TYPE_POWERPC uint32_t(18)
 182
 183 #define CPU_TYPE_I386 CPU_TYPE_X86
 184
 185 #define CPU_TYPE_ARM64     (CPU_ARCH_ABI64 | CPU_TYPE_ARM)
 186 #define CPU_TYPE_POWERPC64 (CPU_ARCH_ABI64 | CPU_TYPE_POWERPC)
 187 #define CPU_TYPE_X86_64    (CPU_ARCH_ABI64 | CPU_TYPE_X86)
 188
 189 struct fat_header {
 190     uint32_t magic;
 191     uint32_t nfat_arch;
 192 } _packed;
 193
 194 #define FAT_MAGIC 0xcafebabe
 195 #define FAT_CIGAM 0xbebafeca
 196
 197 struct fat_arch {
 198     uint32_t cputype;
 199     uint32_t cpusubtype;
 200     uint32_t offset;
 201     uint32_t size;
 202     uint32_t align;
 203 } _packed;
 204
 205 struct mach_header {
 206     uint32_t magic;
 207     uint32_t cputype;
 208     uint32_t cpusubtype;
 209     uint32_t filetype;
 210     uint32_t ncmds;
 211     uint32_t sizeofcmds;
 212     uint32_t flags;
 213 } _packed;
 214
 215 #define MH_MAGIC 0xfeedface
 216 #define MH_CIGAM 0xcefaedfe
 217
 218 #define MH_MAGIC_64 0xfeedfacf
 219 #define MH_CIGAM_64 0xcffaedfe
 220
 221 #define MH_DYLDLINK   0x4
 222
 223 #define MH_OBJECT     0x1
 224 #define MH_EXECUTE    0x2
 225 #define MH_DYLIB      0x6
 226 #define MH_BUNDLE     0x8
 227 #define MH_DYLIB_STUB 0x9
 228
 229 struct load_command {
 230     uint32_t cmd;
 231     uint32_t cmdsize;
 232 } _packed;
 233
 234 #define LC_REQ_DYLD           uint32_t(0x80000000)
 235
 236 #define LC_SEGMENT            uint32_t(0x01)
 237 #define LC_SYMTAB             uint32_t(0x02)
 238 #define LC_DYSYMTAB           uint32_t(0x0b)
 239 #define LC_LOAD_DYLIB         uint32_t(0x0c)
 240 #define LC_ID_DYLIB           uint32_t(0x0d)
 241 #define LC_SEGMENT_64         uint32_t(0x19)
 242 #define LC_UUID               uint32_t(0x1b)
 243 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
 244 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
 245 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
 246 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
 247 #define LC_DYLD_INFO          uint32_t(0x22)
 248 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
 249 #define LC_ENCRYPTION_INFO_64 uint32_t(0x2c)
 250
 251 union Version {
 252     struct {
 253         uint8_t patch;
 254         uint8_t minor;
 255         uint16_t major;
 256     } _packed;
 257
 258     uint32_t value;
 259 };
 260
 261 struct dylib {
 262     uint32_t name;
 263     uint32_t timestamp;
 264     uint32_t current_version;
 265     uint32_t compatibility_version;
 266 } _packed;
 267
 268 struct dylib_command {
 269     uint32_t cmd;
 270     uint32_t cmdsize;
 271     struct dylib dylib;
 272 } _packed;
 273
 274 struct uuid_command {
 275     uint32_t cmd;
 276     uint32_t cmdsize;
 277     uint8_t uuid[16];
 278 } _packed;
 279
 280 struct symtab_command {
 281     uint32_t cmd;
 282     uint32_t cmdsize;
 283     uint32_t symoff;
 284     uint32_t nsyms;
 285     uint32_t stroff;
 286     uint32_t strsize;
 287 } _packed;
 288
 289 struct dyld_info_command {
 290     uint32_t cmd;
 291     uint32_t cmdsize;
 292     uint32_t rebase_off;
 293     uint32_t rebase_size;
 294     uint32_t bind_off;
 295     uint32_t bind_size;
 296     uint32_t weak_bind_off;
 297     uint32_t weak_bind_size;
 298     uint32_t lazy_bind_off;
 299     uint32_t lazy_bind_size;
 300     uint32_t export_off;
 301     uint32_t export_size;
 302 } _packed;
 303
 304 struct dysymtab_command {
 305     uint32_t cmd;
 306     uint32_t cmdsize;
 307     uint32_t ilocalsym;
 308     uint32_t nlocalsym;
 309     uint32_t iextdefsym;
 310     uint32_t nextdefsym;
 311     uint32_t iundefsym;
 312     uint32_t nundefsym;
 313     uint32_t tocoff;
 314     uint32_t ntoc;
 315     uint32_t modtaboff;
 316     uint32_t nmodtab;
 317     uint32_t extrefsymoff;
 318     uint32_t nextrefsyms;
 319     uint32_t indirectsymoff;
 320     uint32_t nindirectsyms;
 321     uint32_t extreloff;
 322     uint32_t nextrel;
 323     uint32_t locreloff;
 324     uint32_t nlocrel;
 325 } _packed;
 326
 327 struct dylib_table_of_contents {
 328     uint32_t symbol_index;
 329     uint32_t module_index;
 330 } _packed;
 331
 332 struct dylib_module {
 333     uint32_t module_name;
 334     uint32_t iextdefsym;
 335     uint32_t nextdefsym;
 336     uint32_t irefsym;
 337     uint32_t nrefsym;
 338     uint32_t ilocalsym;
 339     uint32_t nlocalsym;
 340     uint32_t iextrel;
 341     uint32_t nextrel;
 342     uint32_t iinit_iterm;
 343     uint32_t ninit_nterm;
 344     uint32_t objc_module_info_addr;
 345     uint32_t objc_module_info_size;
 346 } _packed;
 347
 348 struct dylib_reference {
 349     uint32_t isym:24;
 350     uint32_t flags:8;
 351 } _packed;
 352
 353 struct relocation_info {
 354     int32_t r_address;
 355     uint32_t r_symbolnum:24;
 356     uint32_t r_pcrel:1;
 357     uint32_t r_length:2;
 358     uint32_t r_extern:1;
 359     uint32_t r_type:4;
 360 } _packed;
 361
 362 struct nlist {
 363     union {
 364         char *n_name;
 365         int32_t n_strx;
 366     } n_un;
 367
 368     uint8_t n_type;
 369     uint8_t n_sect;
 370     uint8_t n_desc;
 371     uint32_t n_value;
 372 } _packed;
 373
 374 struct segment_command {
 375     uint32_t cmd;
 376     uint32_t cmdsize;
 377     char segname[16];
 378     uint32_t vmaddr;
 379     uint32_t vmsize;
 380     uint32_t fileoff;
 381     uint32_t filesize;
 382     uint32_t maxprot;
 383     uint32_t initprot;
 384     uint32_t nsects;
 385     uint32_t flags;
 386 } _packed;
 387
 388 struct segment_command_64 {
 389     uint32_t cmd;
 390     uint32_t cmdsize;
 391     char segname[16];
 392     uint64_t vmaddr;
 393     uint64_t vmsize;
 394     uint64_t fileoff;
 395     uint64_t filesize;
 396     uint32_t maxprot;
 397     uint32_t initprot;
 398     uint32_t nsects;
 399     uint32_t flags;
 400 } _packed;
 401
 402 struct section {
 403     char sectname[16];
 404     char segname[16];
 405     uint32_t addr;
 406     uint32_t size;
 407     uint32_t offset;
 408     uint32_t align;
 409     uint32_t reloff;
 410     uint32_t nreloc;
 411     uint32_t flags;
 412     uint32_t reserved1;
 413     uint32_t reserved2;
 414 } _packed;
 415
 416 struct section_64 {
 417     char sectname[16];
 418     char segname[16];
 419     uint64_t addr;
 420     uint64_t size;
 421     uint32_t offset;
 422     uint32_t align;
 423     uint32_t reloff;
 424     uint32_t nreloc;
 425     uint32_t flags;
 426     uint32_t reserved1;
 427     uint32_t reserved2;
 428     uint32_t reserved3;
 429 } _packed;
 430
 431 struct linkedit_data_command {
 432     uint32_t cmd;
 433     uint32_t cmdsize;
 434     uint32_t dataoff;
 435     uint32_t datasize;
 436 } _packed;
 437
 438 struct encryption_info_command {
 439     uint32_t cmd;
 440     uint32_t cmdsize;
 441     uint32_t cryptoff;
 442     uint32_t cryptsize;
 443     uint32_t cryptid;
 444 } _packed;
 445
 446 #define BIND_OPCODE_MASK                             0xf0
 447 #define BIND_IMMEDIATE_MASK                          0x0f
 448 #define BIND_OPCODE_DONE                             0x00
 449 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 450 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 451 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 452 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 453 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 454 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 455 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 456 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 457 #define BIND_OPCODE_DO_BIND                          0x90
 458 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 459 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 460 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 461
 462 inline void get(std::streambuf &stream, void *data, size_t size) {
 463     _assert(stream.sgetn(static_cast<char *>(data), size) == size);
 464 }
 465
 466 inline void put(std::streambuf &stream, const void *data, size_t size) {
 467     _assert(stream.sputn(static_cast<const char *>(data), size) == size);
 468 }
 469
 470 inline void pad(std::streambuf &stream, size_t size) {
 471     char padding[size];
 472     memset(padding, 0, size);
 473     put(stream, padding, size);
 474 }
 475
 476 template <typename Type_>
 477 Type_ Align(Type_ value, size_t align) {
 478     value += align - 1;
 479     value /= align;
 480     value *= align;
 481     return value;
 482 }
 483
 484 static const uint8_t PageShift_(0x0c);
 485 static const uint32_t PageSize_(1 << PageShift_);
 486
 487 static inline uint16_t Swap_(uint16_t value) {
 488     return
 489         ((value >>  8) & 0x00ff) |
 490         ((value <<  8) & 0xff00);
 491 }
 492
 493 static inline uint32_t Swap_(uint32_t value) {
 494     value = ((value >>  8) & 0x00ff00ff) |
 495             ((value <<  8) & 0xff00ff00);
 496     value = ((value >> 16) & 0x0000ffff) |
 497             ((value << 16) & 0xffff0000);
 498     return value;
 499 }
 500
 501 static inline uint64_t Swap_(uint64_t value) {
 502     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 503     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 504     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 505     return value;
 506 }
 507
 508 static inline int16_t Swap_(int16_t value) {
 509     return Swap_(static_cast<uint16_t>(value));
 510 }
 511
 512 static inline int32_t Swap_(int32_t value) {
 513     return Swap_(static_cast<uint32_t>(value));
 514 }
 515
 516 static inline int64_t Swap_(int64_t value) {
 517     return Swap_(static_cast<uint64_t>(value));
 518 }
 519
 520 static bool little_(true);
 521
 522 static inline uint16_t Swap(uint16_t value) {
 523     return little_ ? Swap_(value) : value;
 524 }
 525
 526 static inline uint32_t Swap(uint32_t value) {
 527     return little_ ? Swap_(value) : value;
 528 }
 529
 530 static inline uint64_t Swap(uint64_t value) {
 531     return little_ ? Swap_(value) : value;
 532 }
 533
 534 static inline int16_t Swap(int16_t value) {
 535     return Swap(static_cast<uint16_t>(value));
 536 }
 537
 538 static inline int32_t Swap(int32_t value) {
 539     return Swap(static_cast<uint32_t>(value));
 540 }
 541
 542 static inline int64_t Swap(int64_t value) {
 543     return Swap(static_cast<uint64_t>(value));
 544 }
 545
 546 class Swapped {
 547   protected:
 548     bool swapped_;
 549
 550     Swapped() :
 551         swapped_(false)
 552     {
 553     }
 554
 555   public:
 556     Swapped(bool swapped) :
 557         swapped_(swapped)
 558     {
 559     }
 560
 561     template <typename Type_>
 562     Type_ Swap(Type_ value) const {
 563         return swapped_ ? Swap_(value) : value;
 564     }
 565 };
 566
 567 class Data :
 568     public Swapped
 569 {
 570   private:
 571     void *base_;
 572     size_t size_;
 573
 574   public:
 575     Data(void *base, size_t size) :
 576         base_(base),
 577         size_(size)
 578     {
 579     }
 580
 581     void *GetBase() const {
 582         return base_;
 583     }
 584
 585     size_t GetSize() const {
 586         return size_;
 587     }
 588 };
 589
 590 class MachHeader :
 591     public Data
 592 {
 593   private:
 594     bool bits64_;
 595
 596     struct mach_header *mach_header_;
 597     struct load_command *load_command_;
 598
 599   public:
 600     MachHeader(void *base, size_t size) :
 601         Data(base, size)
 602     {
 603         mach_header_ = (mach_header *) base;
 604
 605         switch (Swap(mach_header_->magic)) {
 606             case MH_CIGAM:
 607                 swapped_ = !swapped_;
 608             case MH_MAGIC:
 609                 bits64_ = false;
 610             break;
 611
 612             case MH_CIGAM_64:
 613                 swapped_ = !swapped_;
 614             case MH_MAGIC_64:
 615                 bits64_ = true;
 616             break;
 617
 618             default:
 619                 _assert(false);
 620         }
 621
 622         void *post = mach_header_ + 1;
 623         if (bits64_)
 624             post = (uint32_t *) post + 1;
 625         load_command_ = (struct load_command *) post;
 626
 627         _assert(
 628             Swap(mach_header_->filetype) == MH_EXECUTE ||
 629             Swap(mach_header_->filetype) == MH_DYLIB ||
 630             Swap(mach_header_->filetype) == MH_BUNDLE
 631         );
 632     }
 633
 634     bool Bits64() const {
 635         return bits64_;
 636     }
 637
 638     struct mach_header *operator ->() const {
 639         return mach_header_;
 640     }
 641
 642     operator struct mach_header *() const {
 643         return mach_header_;
 644     }
 645
 646     uint32_t GetCPUType() const {
 647         return Swap(mach_header_->cputype);
 648     }
 649
 650     uint32_t GetCPUSubtype() const {
 651         return Swap(mach_header_->cpusubtype) & 0xff;
 652     }
 653
 654     struct load_command *GetLoadCommand() const {
 655         return load_command_;
 656     }
 657
 658     std::vector<struct load_command *> GetLoadCommands() const {
 659         std::vector<struct load_command *> load_commands;
 660
 661         struct load_command *load_command = load_command_;
 662         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 663             load_commands.push_back(load_command);
 664             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 665         }
 666
 667         return load_commands;
 668     }
 669
 670     void ForSection(const ldid::Functor<void (const char *, const char *, void *, size_t)> &code) const {
 671         _foreach (load_command, GetLoadCommands())
 672             switch (Swap(load_command->cmd)) {
 673                 case LC_SEGMENT: {
 674                     auto segment(reinterpret_cast<struct segment_command *>(load_command));
 675                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 676                     auto section(reinterpret_cast<struct section *>(segment + 1));
 677                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 678                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 679                 } break;
 680
 681                 case LC_SEGMENT_64: {
 682                     auto segment(reinterpret_cast<struct segment_command_64 *>(load_command));
 683                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 684                     auto section(reinterpret_cast<struct section_64 *>(segment + 1));
 685                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 686                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 687                 } break;
 688             }
 689     }
 690
 691     template <typename Target_>
 692     Target_ *GetOffset(uint32_t offset) const {
 693         return reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_);
 694     }
 695 };
 696
 697 class FatMachHeader :
 698     public MachHeader
 699 {
 700   private:
 701     fat_arch *fat_arch_;
 702
 703   public:
 704     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 705         MachHeader(base, size),
 706         fat_arch_(fat_arch)
 707     {
 708     }
 709
 710     fat_arch *GetFatArch() const {
 711         return fat_arch_;
 712     }
 713 };
 714
 715 class FatHeader :
 716     public Data
 717 {
 718   private:
 719     fat_header *fat_header_;
 720     std::vector<FatMachHeader> mach_headers_;
 721
 722   public:
 723     FatHeader(void *base, size_t size) :
 724         Data(base, size)
 725     {
 726         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 727
 728         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 729             swapped_ = !swapped_;
 730             goto fat;
 731         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 732             fat_header_ = NULL;
 733             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 734         } else fat: {
 735             size_t fat_narch = Swap(fat_header_->nfat_arch);
 736             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 737             size_t arch;
 738             for (arch = 0; arch != fat_narch; ++arch) {
 739                 uint32_t arch_offset = Swap(fat_arch->offset);
 740                 uint32_t arch_size = Swap(fat_arch->size);
 741                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 742                 ++fat_arch;
 743             }
 744         }
 745     }
 746
 747     std::vector<FatMachHeader> &GetMachHeaders() {
 748         return mach_headers_;
 749     }
 750
 751     bool IsFat() const {
 752         return fat_header_ != NULL;
 753     }
 754
 755     struct fat_header *operator ->() const {
 756         return fat_header_;
 757     }
 758
 759     operator struct fat_header *() const {
 760         return fat_header_;
 761     }
 762 };
 763
 764 #define CSMAGIC_REQUIREMENT            uint32_t(0xfade0c00)
 765 #define CSMAGIC_REQUIREMENTS           uint32_t(0xfade0c01)
 766 #define CSMAGIC_CODEDIRECTORY          uint32_t(0xfade0c02)
 767 #define CSMAGIC_EMBEDDED_SIGNATURE     uint32_t(0xfade0cc0)
 768 #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02)
 769 #define CSMAGIC_EMBEDDED_ENTITLEMENTS  uint32_t(0xfade7171)
 770 #define CSMAGIC_DETACHED_SIGNATURE     uint32_t(0xfade0cc1)
 771 #define CSMAGIC_BLOBWRAPPER            uint32_t(0xfade0b01)
 772
 773 #define CSSLOT_CODEDIRECTORY uint32_t(0x00000)
 774 #define CSSLOT_INFOSLOT      uint32_t(0x00001)
 775 #define CSSLOT_REQUIREMENTS  uint32_t(0x00002)
 776 #define CSSLOT_RESOURCEDIR   uint32_t(0x00003)
 777 #define CSSLOT_APPLICATION   uint32_t(0x00004)
 778 #define CSSLOT_ENTITLEMENTS  uint32_t(0x00005)
 779
 780 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 781
 782 #define CS_HASHTYPE_SHA1 1
 783
 784 struct BlobIndex {
 785     uint32_t type;
 786     uint32_t offset;
 787 } _packed;
 788
 789 struct Blob {
 790     uint32_t magic;
 791     uint32_t length;
 792 } _packed;
 793
 794 struct SuperBlob {
 795     struct Blob blob;
 796     uint32_t count;
 797     struct BlobIndex index[];
 798 } _packed;
 799
 800 struct CodeDirectory {
 801     uint32_t version;
 802     uint32_t flags;
 803     uint32_t hashOffset;
 804     uint32_t identOffset;
 805     uint32_t nSpecialSlots;
 806     uint32_t nCodeSlots;
 807     uint32_t codeLimit;
 808     uint8_t hashSize;
 809     uint8_t hashType;
 810     uint8_t spare1;
 811     uint8_t pageSize;
 812     uint32_t spare2;
 813     uint32_t scatterOffset;
 814     uint32_t teamIDOffset;
 815     uint32_t spare3;
 816     uint64_t codeLimit64;
 817 } _packed;
 818
 819 #ifndef LDID_NOFLAGT
 820 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 821 #endif
 822
 823 static void sha1(uint8_t *hash, const void *data, size_t size) {
 824     LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 825 }
 826
 827 static void sha1(std::vector<char> &hash, const void *data, size_t size) {
 828     hash.resize(LDID_SHA1_DIGEST_LENGTH);
 829     sha1(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 830 }
 831
 832 struct CodesignAllocation {
 833     FatMachHeader mach_header_;
 834     uint32_t offset_;
 835     uint32_t size_;
 836     uint32_t limit_;
 837     uint32_t alloc_;
 838     uint32_t align_;
 839
 840     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
 841         mach_header_(mach_header),
 842         offset_(offset),
 843         size_(size),
 844         limit_(limit),
 845         alloc_(alloc),
 846         align_(align)
 847     {
 848     }
 849 };
 850
 851 #ifndef LDID_NOTOOLS
 852 class File {
 853   private:
 854     int file_;
 855
 856   public:
 857     File() :
 858         file_(-1)
 859     {
 860     }
 861
 862     ~File() {
 863         if (file_ != -1)
 864             _syscall(close(file_));
 865     }
 866
 867     void open(const char *path, int flags) {
 868         _assert(file_ == -1);
 869         file_ = _syscall(::open(path, flags));
 870     }
 871
 872     int file() const {
 873         return file_;
 874     }
 875 };
 876
 877 class Map {
 878   private:
 879     File file_;
 880     void *data_;
 881     size_t size_;
 882
 883     void clear() {
 884         if (data_ == NULL)
 885             return;
 886         _syscall(munmap(data_, size_));
 887         data_ = NULL;
 888         size_ = 0;
 889     }
 890
 891   public:
 892     Map() :
 893         data_(NULL),
 894         size_(0)
 895     {
 896     }
 897
 898     Map(const std::string &path, int oflag, int pflag, int mflag) :
 899         Map()
 900     {
 901         open(path, oflag, pflag, mflag);
 902     }
 903
 904     Map(const std::string &path, bool edit) :
 905         Map()
 906     {
 907         open(path, edit);
 908     }
 909
 910     ~Map() {
 911         clear();
 912     }
 913
 914     bool empty() const {
 915         return data_ == NULL;
 916     }
 917
 918     void open(const std::string &path, int oflag, int pflag, int mflag) {
 919         clear();
 920
 921         file_.open(path.c_str(), oflag);
 922         int file(file_.file());
 923
 924         struct stat stat;
 925         _syscall(fstat(file, &stat));
 926         size_ = stat.st_size;
 927
 928         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
 929     }
 930
 931     void open(const std::string &path, bool edit) {
 932         if (edit)
 933             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
 934         else
 935             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
 936     }
 937
 938     void *data() const {
 939         return data_;
 940     }
 941
 942     size_t size() const {
 943         return size_;
 944     }
 945
 946     operator std::string() const {
 947         return std::string(static_cast<char *>(data_), size_);
 948     }
 949 };
 950 #endif
 951
 952 namespace ldid {
 953
 954 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 *)> &save) {
 955     FatHeader source(const_cast<void *>(idata), isize);
 956
 957     size_t offset(0);
 958     if (source.IsFat())
 959         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
 960
 961     std::vector<CodesignAllocation> allocations;
 962     _foreach (mach_header, source.GetMachHeaders()) {
 963         struct linkedit_data_command *signature(NULL);
 964         struct symtab_command *symtab(NULL);
 965
 966         _foreach (load_command, mach_header.GetLoadCommands()) {
 967             uint32_t cmd(mach_header.Swap(load_command->cmd));
 968             if (false);
 969             else if (cmd == LC_CODE_SIGNATURE)
 970                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
 971             else if (cmd == LC_SYMTAB)
 972                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
 973         }
 974
 975         size_t size;
 976         if (signature == NULL)
 977             size = mach_header.GetSize();
 978         else {
 979             size = mach_header.Swap(signature->dataoff);
 980             _assert(size <= mach_header.GetSize());
 981         }
 982
 983         if (symtab != NULL) {
 984             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
 985             _assert(end <= size);
 986             _assert(end >= size - 0x10);
 987             size = end;
 988         }
 989
 990         size_t alloc(allocate(mach_header, size));
 991
 992         auto *fat_arch(mach_header.GetFatArch());
 993         uint32_t align;
 994
 995         if (fat_arch != NULL)
 996             align = source.Swap(fat_arch->align);
 997         else switch (mach_header.GetCPUType()) {
 998             case CPU_TYPE_POWERPC:
 999             case CPU_TYPE_POWERPC64:
1000             case CPU_TYPE_X86:
1001             case CPU_TYPE_X86_64:
1002                 align = 0xc;
1003                 break;
1004             case CPU_TYPE_ARM:
1005             case CPU_TYPE_ARM64:
1006                 align = 0xe;
1007                 break;
1008             default:
1009                 align = 0x0;
1010                 break;
1011         }
1012
1013         offset = Align(offset, 1 << align);
1014
1015         uint32_t limit(size);
1016         if (alloc != 0)
1017             limit = Align(limit, 0x10);
1018
1019         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
1020         offset += size + alloc;
1021         offset = Align(offset, 0x10);
1022     }
1023
1024     size_t position(0);
1025
1026     if (source.IsFat()) {
1027         fat_header fat_header;
1028         fat_header.magic = Swap(FAT_MAGIC);
1029         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1030         put(output, &fat_header, sizeof(fat_header));
1031         position += sizeof(fat_header);
1032
1033         _foreach (allocation, allocations) {
1034             auto &mach_header(allocation.mach_header_);
1035
1036             fat_arch fat_arch;
1037             fat_arch.cputype = Swap(mach_header->cputype);
1038             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1039             fat_arch.offset = Swap(allocation.offset_);
1040             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1041             fat_arch.align = Swap(allocation.align_);
1042             put(output, &fat_arch, sizeof(fat_arch));
1043             position += sizeof(fat_arch);
1044         }
1045     }
1046
1047     _foreach (allocation, allocations) {
1048         auto &mach_header(allocation.mach_header_);
1049
1050         pad(output, allocation.offset_ - position);
1051         position = allocation.offset_;
1052
1053         std::vector<std::string> commands;
1054
1055         _foreach (load_command, mach_header.GetLoadCommands()) {
1056             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1057
1058             switch (mach_header.Swap(load_command->cmd)) {
1059                 case LC_CODE_SIGNATURE:
1060                     continue;
1061                 break;
1062
1063                 case LC_SEGMENT: {
1064                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1065                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1066                         break;
1067                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1068                     segment_command->filesize = size;
1069                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1070                 } break;
1071
1072                 case LC_SEGMENT_64: {
1073                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1074                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1075                         break;
1076                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1077                     segment_command->filesize = size;
1078                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1079                 } break;
1080             }
1081
1082             commands.push_back(copy);
1083         }
1084
1085         if (allocation.alloc_ != 0) {
1086             linkedit_data_command signature;
1087             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1088             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1089             signature.dataoff = mach_header.Swap(allocation.limit_);
1090             signature.datasize = mach_header.Swap(allocation.alloc_);
1091             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1092         }
1093
1094         size_t begin(position);
1095
1096         uint32_t after(0);
1097         _foreach(command, commands)
1098             after += command.size();
1099
1100         std::stringbuf altern;
1101
1102         struct mach_header header(*mach_header);
1103         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1104         header.sizeofcmds = mach_header.Swap(after);
1105         put(output, &header, sizeof(header));
1106         put(altern, &header, sizeof(header));
1107         position += sizeof(header);
1108
1109         if (mach_header.Bits64()) {
1110             auto pad(mach_header.Swap(uint32_t(0)));
1111             put(output, &pad, sizeof(pad));
1112             put(altern, &pad, sizeof(pad));
1113             position += sizeof(pad);
1114         }
1115
1116         _foreach(command, commands) {
1117             put(output, command.data(), command.size());
1118             put(altern, command.data(), command.size());
1119             position += command.size();
1120         }
1121
1122         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1123         if (before > after) {
1124             pad(output, before - after);
1125             pad(altern, before - after);
1126             position += before - after;
1127         }
1128
1129         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1130
1131         std::string overlap(altern.str());
1132         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1133
1134         put(output, top + (position - begin), allocation.size_ - (position - begin));
1135         position = begin + allocation.size_;
1136
1137         pad(output, allocation.limit_ - allocation.size_);
1138         position += allocation.limit_ - allocation.size_;
1139
1140         size_t saved(save(mach_header, output, allocation.limit_, overlap, top));
1141         if (allocation.alloc_ > saved)
1142             pad(output, allocation.alloc_ - saved);
1143         position += allocation.alloc_;
1144     }
1145 }
1146
1147 }
1148
1149 typedef std::map<uint32_t, std::string> Blobs;
1150
1151 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1152     auto value(buffer.str());
1153     std::swap(blobs[slot], value);
1154 }
1155
1156 static void insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1157     auto value(buffer.str());
1158     Blob blob;
1159     blob.magic = Swap(magic);
1160     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1161     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1162     std::swap(blobs[slot], value);
1163 }
1164
1165 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1166     size_t total(0);
1167     _foreach (blob, blobs)
1168         total += blob.second.size();
1169
1170     struct SuperBlob super;
1171     super.blob.magic = Swap(magic);
1172     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1173     super.count = Swap(uint32_t(blobs.size()));
1174     put(output, &super, sizeof(super));
1175
1176     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1177
1178     _foreach (blob, blobs) {
1179         BlobIndex index;
1180         index.type = Swap(blob.first);
1181         index.offset = Swap(uint32_t(offset));
1182         put(output, &index, sizeof(index));
1183         offset += blob.second.size();
1184     }
1185
1186     _foreach (blob, blobs)
1187         put(output, blob.second.data(), blob.second.size());
1188
1189     return offset;
1190 }
1191
1192 #ifndef LDID_NOSMIME
1193 class Buffer {
1194   private:
1195     BIO *bio_;
1196
1197   public:
1198     Buffer(BIO *bio) :
1199         bio_(bio)
1200     {
1201         _assert(bio_ != NULL);
1202     }
1203
1204     Buffer() :
1205         bio_(BIO_new(BIO_s_mem()))
1206     {
1207     }
1208
1209     Buffer(const char *data, size_t size) :
1210         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1211     {
1212     }
1213
1214     Buffer(const std::string &data) :
1215         Buffer(data.data(), data.size())
1216     {
1217     }
1218
1219     Buffer(PKCS7 *pkcs) :
1220         Buffer()
1221     {
1222         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1223     }
1224
1225     ~Buffer() {
1226         BIO_free_all(bio_);
1227     }
1228
1229     operator BIO *() const {
1230         return bio_;
1231     }
1232
1233     explicit operator std::string() const {
1234         char *data;
1235         auto size(BIO_get_mem_data(bio_, &data));
1236         return std::string(data, size);
1237     }
1238 };
1239
1240 class Stuff {
1241   private:
1242     PKCS12 *value_;
1243     EVP_PKEY *key_;
1244     X509 *cert_;
1245     STACK_OF(X509) *ca_;
1246
1247   public:
1248     Stuff(BIO *bio) :
1249         value_(d2i_PKCS12_bio(bio, NULL)),
1250         ca_(NULL)
1251     {
1252         _assert(value_ != NULL);
1253         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1254         _assert(key_ != NULL);
1255         _assert(cert_ != NULL);
1256     }
1257
1258     Stuff(const std::string &data) :
1259         Stuff(Buffer(data))
1260     {
1261     }
1262
1263     ~Stuff() {
1264         sk_X509_pop_free(ca_, X509_free);
1265         X509_free(cert_);
1266         EVP_PKEY_free(key_);
1267         PKCS12_free(value_);
1268     }
1269
1270     operator PKCS12 *() const {
1271         return value_;
1272     }
1273
1274     operator EVP_PKEY *() const {
1275         return key_;
1276     }
1277
1278     operator X509 *() const {
1279         return cert_;
1280     }
1281
1282     operator STACK_OF(X509) *() const {
1283         return ca_;
1284     }
1285 };
1286
1287 class Signature {
1288   private:
1289     PKCS7 *value_;
1290
1291   public:
1292     Signature(const Stuff &stuff, const Buffer &data) :
1293         value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED))
1294     {
1295         _assert(value_ != NULL);
1296     }
1297
1298     ~Signature() {
1299         PKCS7_free(value_);
1300     }
1301
1302     operator PKCS7 *() const {
1303         return value_;
1304     }
1305 };
1306 #endif
1307
1308 class NullBuffer :
1309     public std::streambuf
1310 {
1311   public:
1312     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1313         return size;
1314     }
1315
1316     virtual int_type overflow(int_type next) {
1317         return next;
1318     }
1319 };
1320
1321 class HashBuffer :
1322     public std::streambuf
1323 {
1324   private:
1325     std::vector<char> &hash_;
1326     LDID_SHA1_CTX context_;
1327
1328   public:
1329     HashBuffer(std::vector<char> &hash) :
1330         hash_(hash)
1331     {
1332         LDID_SHA1_Init(&context_);
1333     }
1334
1335     ~HashBuffer() {
1336         hash_.resize(LDID_SHA1_DIGEST_LENGTH);
1337         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.data()), &context_);
1338     }
1339
1340     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1341         LDID_SHA1_Update(&context_, data, size);
1342         return size;
1343     }
1344
1345     virtual int_type overflow(int_type next) {
1346         if (next == traits_type::eof())
1347             return sync();
1348         char value(next);
1349         xsputn(&value, 1);
1350         return next;
1351     }
1352 };
1353
1354 class HashProxy :
1355     public HashBuffer
1356 {
1357   private:
1358     std::streambuf &buffer_;
1359
1360   public:
1361     HashProxy(std::vector<char> &hash, std::streambuf &buffer) :
1362         HashBuffer(hash),
1363         buffer_(buffer)
1364     {
1365     }
1366
1367     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1368         _assert(HashBuffer::xsputn(data, size) == size);
1369         return buffer_.sputn(data, size);
1370     }
1371 };
1372
1373 #ifndef LDID_NOTOOLS
1374 static bool Starts(const std::string &lhs, const std::string &rhs) {
1375     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1376 }
1377
1378 class Split {
1379   public:
1380     std::string dir;
1381     std::string base;
1382
1383     Split(const std::string &path) {
1384         size_t slash(path.rfind('/'));
1385         if (slash == std::string::npos)
1386             base = path;
1387         else {
1388             dir = path.substr(0, slash + 1);
1389             base = path.substr(slash + 1);
1390         }
1391     }
1392 };
1393
1394 static void mkdir_p(const std::string &path) {
1395     if (path.empty())
1396         return;
1397 #ifdef __WIN32__
1398     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1399         return;
1400 #else
1401     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1402         return;
1403 #endif
1404     auto slash(path.rfind('/', path.size() - 1));
1405     if (slash == std::string::npos)
1406         return;
1407     mkdir_p(path.substr(0, slash));
1408 }
1409
1410 static std::string Temporary(std::filebuf &file, const Split &split) {
1411     std::string temp(split.dir + ".ldid." + split.base);
1412     mkdir_p(split.dir);
1413     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1414     return temp;
1415 }
1416
1417 static void Commit(const std::string &path, const std::string &temp) {
1418     struct stat info;
1419     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1420 #ifndef __WIN32__
1421         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1422 #endif
1423         _syscall(chmod(temp.c_str(), info.st_mode));
1424     }
1425
1426     _syscall(rename(temp.c_str(), path.c_str()));
1427 }
1428 #endif
1429
1430 namespace ldid {
1431
1432 void Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &key, const Slots &slots) {
1433     std::string team;
1434
1435 #ifndef LDID_NOSMIME
1436     if (!key.empty()) {
1437         std::stringbuf data;
1438         Stuff stuff(key);
1439         auto name(X509_get_subject_name(stuff));
1440         _assert(name != NULL);
1441         auto index(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, -1));
1442         _assert(index >= 0);
1443         auto next(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, index));
1444         _assert(next == -1);
1445         auto entry(X509_NAME_get_entry(name, index));
1446         _assert(entry != NULL);
1447         auto asn(X509_NAME_ENTRY_get_data(entry));
1448         _assert(asn != NULL);
1449         team.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1450     }
1451 #endif
1452
1453     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1454         size_t alloc(sizeof(struct SuperBlob));
1455
1456         uint32_t special(0);
1457
1458         special = std::max(special, CSSLOT_REQUIREMENTS);
1459         alloc += sizeof(struct BlobIndex);
1460         alloc += 0xc;
1461
1462         if (!entitlements.empty()) {
1463             special = std::max(special, CSSLOT_ENTITLEMENTS);
1464             alloc += sizeof(struct BlobIndex);
1465             alloc += sizeof(struct Blob);
1466             alloc += entitlements.size();
1467         }
1468
1469         special = std::max(special, CSSLOT_CODEDIRECTORY);
1470         alloc += sizeof(struct BlobIndex);
1471         alloc += sizeof(struct Blob);
1472         alloc += sizeof(struct CodeDirectory);
1473         alloc += identifier.size() + 1;
1474
1475         if (!team.empty())
1476             alloc += team.size() + 1;
1477
1478         if (!key.empty()) {
1479             alloc += sizeof(struct BlobIndex);
1480             alloc += sizeof(struct Blob);
1481             // XXX: this is just a "sufficiently large number"
1482             alloc += 0x3000;
1483         }
1484
1485         _foreach (slot, slots)
1486             special = std::max(special, slot.first);
1487
1488         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1489             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1490                 special = std::max(special, CSSLOT_INFOSLOT);
1491         }));
1492
1493         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1494         alloc = Align(alloc + (special + normal) * LDID_SHA1_DIGEST_LENGTH, 16);
1495         return alloc;
1496     }), fun([&](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1497         Blobs blobs;
1498
1499         if (true) {
1500             std::stringbuf data;
1501
1502             Blobs requirements;
1503             put(data, CSMAGIC_REQUIREMENTS, requirements);
1504
1505             insert(blobs, CSSLOT_REQUIREMENTS, data);
1506         }
1507
1508         if (!entitlements.empty()) {
1509             std::stringbuf data;
1510             put(data, entitlements.data(), entitlements.size());
1511             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1512         }
1513
1514         if (true) {
1515             std::stringbuf data;
1516
1517             Slots posts(slots);
1518
1519             mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1520                 if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1521                     sha1(posts[CSSLOT_INFOSLOT], data, size);
1522             }));
1523
1524             uint32_t special(0);
1525             _foreach (blob, blobs)
1526                 special = std::max(special, blob.first);
1527             _foreach (slot, posts)
1528                 special = std::max(special, slot.first);
1529             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1530
1531             CodeDirectory directory;
1532             directory.version = Swap(uint32_t(0x00020200));
1533             directory.flags = Swap(uint32_t(0));
1534             directory.nSpecialSlots = Swap(special);
1535             directory.codeLimit = Swap(uint32_t(limit));
1536             directory.nCodeSlots = Swap(normal);
1537             directory.hashSize = LDID_SHA1_DIGEST_LENGTH;
1538             directory.hashType = CS_HASHTYPE_SHA1;
1539             directory.spare1 = 0x00;
1540             directory.pageSize = PageShift_;
1541             directory.spare2 = Swap(uint32_t(0));
1542             directory.scatterOffset = Swap(uint32_t(0));
1543             directory.spare3 = Swap(uint32_t(0));
1544             directory.codeLimit64 = Swap(uint64_t(0));
1545
1546             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1547
1548             directory.identOffset = Swap(uint32_t(offset));
1549             offset += identifier.size() + 1;
1550
1551             if (team.empty())
1552                 directory.teamIDOffset = Swap(uint32_t(0));
1553             else {
1554                 directory.teamIDOffset = Swap(uint32_t(offset));
1555                 offset += team.size() + 1;
1556             }
1557
1558             offset += LDID_SHA1_DIGEST_LENGTH * special;
1559             directory.hashOffset = Swap(uint32_t(offset));
1560             offset += LDID_SHA1_DIGEST_LENGTH * normal;
1561
1562             put(data, &directory, sizeof(directory));
1563
1564             put(data, identifier.c_str(), identifier.size() + 1);
1565             put(data, team.c_str(), team.size() + 1);
1566
1567             uint8_t storage[special + normal][LDID_SHA1_DIGEST_LENGTH];
1568             uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = storage + special;
1569
1570             memset(storage, 0, sizeof(*storage) * special);
1571
1572             _foreach (blob, blobs) {
1573                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1574                 sha1((uint8_t *) (hashes - blob.first), local, Swap(local->length));
1575             }
1576
1577             _foreach (slot, posts) {
1578                 _assert(sizeof(*hashes) == slot.second.size());
1579                 memcpy(hashes - slot.first, slot.second.data(), slot.second.size());
1580             }
1581
1582             if (normal != 1)
1583                 for (size_t i = 0; i != normal - 1; ++i)
1584                     sha1(hashes[i], (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1585             if (normal != 0)
1586                 sha1(hashes[normal - 1], top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1587
1588             put(data, storage, sizeof(storage));
1589
1590             insert(blobs, CSSLOT_CODEDIRECTORY, CSMAGIC_CODEDIRECTORY, data);
1591         }
1592
1593 #ifndef LDID_NOSMIME
1594         if (!key.empty()) {
1595             std::stringbuf data;
1596             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1597
1598             Stuff stuff(key);
1599             Buffer bio(sign);
1600
1601             Signature signature(stuff, sign);
1602             Buffer result(signature);
1603             std::string value(result);
1604             put(data, value.data(), value.size());
1605
1606             insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data);
1607         }
1608 #endif
1609
1610         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1611     }));
1612 }
1613
1614 #ifndef LDID_NOTOOLS
1615 static void Unsign(void *idata, size_t isize, std::streambuf &output) {
1616     Allocate(idata, isize, output, fun([](const MachHeader &mach_header, size_t size) -> size_t {
1617         return 0;
1618     }), fun([](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1619         return 0;
1620     }));
1621 }
1622
1623 std::string DiskFolder::Path(const std::string &path) {
1624     return path_ + "/" + path;
1625 }
1626
1627 DiskFolder::DiskFolder(const std::string &path) :
1628     path_(path)
1629 {
1630 }
1631
1632 DiskFolder::~DiskFolder() {
1633     if (!std::uncaught_exception())
1634         for (const auto &commit : commit_)
1635             Commit(commit.first, commit.second);
1636 }
1637
1638 void DiskFolder::Find(const std::string &root, const std::string &base, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)>&code) {
1639     std::string path(Path(root) + base);
1640
1641     DIR *dir(opendir(path.c_str()));
1642     _assert(dir != NULL);
1643     _scope({ _syscall(closedir(dir)); });
1644
1645     while (auto child = readdir(dir)) {
1646         std::string name(child->d_name);
1647         if (name == "." || name == "..")
1648             continue;
1649         if (Starts(name, ".ldid."))
1650             continue;
1651
1652         bool directory;
1653
1654 #ifdef __WIN32__
1655         struct stat info;
1656         _syscall(stat(path.c_str(), &info));
1657         if (false);
1658         else if (S_ISDIR(info.st_mode))
1659             directory = true;
1660         else if (S_ISREG(info.st_mode))
1661             directory = false;
1662         else
1663             _assert_(false, "st_mode=%x", info.st_mode);
1664 #else
1665         switch (child->d_type) {
1666             case DT_DIR:
1667                 directory = true;
1668                 break;
1669             case DT_REG:
1670                 directory = false;
1671                 break;
1672             default:
1673                 _assert_(false, "d_type=%u", child->d_type);
1674         }
1675 #endif
1676
1677         if (directory)
1678             Find(root, base + name + "/", code);
1679         else
1680             code(base + name, fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1681                 std::string access(root + base + name);
1682                 _assert_(Open(access, fun([&](std::streambuf &data) {
1683                     NullBuffer save;
1684                     code(data, save);
1685                 })), "open(): %s", access.c_str());
1686             }));
1687     }
1688 }
1689
1690 void DiskFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1691     std::filebuf save;
1692     auto from(Path(path));
1693     commit_[from] = Temporary(save, from);
1694     code(save);
1695 }
1696
1697 bool DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1698     std::filebuf data;
1699     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
1700     if (result == NULL)
1701         return false;
1702     _assert(result == &data);
1703     code(data);
1704     return true;
1705 }
1706
1707 void DiskFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)>&code) {
1708     Find(path, "", code);
1709 }
1710 #endif
1711
1712 SubFolder::SubFolder(Folder &parent, const std::string &path) :
1713     parent_(parent),
1714     path_(path)
1715 {
1716 }
1717
1718 void SubFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1719     return parent_.Save(path_ + path, code);
1720 }
1721
1722 bool SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1723     return parent_.Open(path_ + path, code);
1724 }
1725
1726 void SubFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1727     return parent_.Find(path_ + path, code);
1728 }
1729
1730 std::string UnionFolder::Map(const std::string &path) {
1731     auto remap(remaps_.find(path));
1732     if (remap == remaps_.end())
1733         return path;
1734     return remap->second;
1735 }
1736
1737 void UnionFolder::Map(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code, const std::string &file, const Functor<void (std::streambuf &, const Functor<void (std::streambuf &, std::streambuf &)> &)> &save) {
1738     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
1739         code(file.substr(path.size()), fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1740             parent_.Save(file, fun([&](std::streambuf &data) {
1741                 save(data, code);
1742             }));
1743         }));
1744 }
1745
1746 UnionFolder::UnionFolder(Folder &parent) :
1747     parent_(parent)
1748 {
1749 }
1750
1751 void UnionFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1752     return parent_.Save(Map(path), code);
1753 }
1754
1755 bool UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1756     auto file(resets_.find(path));
1757     if (file == resets_.end())
1758         return parent_.Open(Map(path), code);
1759
1760     auto &data(file->second);
1761     data.pubseekpos(0, std::ios::in);
1762     code(data);
1763     return true;
1764 }
1765
1766 void UnionFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1767     parent_.Find(path, fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &save) {
1768         if (deletes_.find(path + name) == deletes_.end())
1769             code(name, save);
1770     }));
1771
1772     for (auto &reset : resets_)
1773         Map(path, code, reset.first, fun([&](std::streambuf &save, const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1774             reset.second.pubseekpos(0, std::ios::in);
1775             code(reset.second, save);
1776         }));
1777
1778     for (auto &remap : remaps_)
1779         Map(path, code, remap.first, fun([&](std::streambuf &save, const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1780             parent_.Open(remap.second, fun([&](std::streambuf &data) {
1781                 code(data, save);
1782             }));
1783         }));
1784 }
1785
1786 #ifndef LDID_NOTOOLS
1787 static size_t copy(std::streambuf &source, std::streambuf &target) {
1788     size_t total(0);
1789     for (;;) {
1790         char data[4096];
1791         size_t writ(source.sgetn(data, sizeof(data)));
1792         if (writ == 0)
1793             break;
1794         _assert(target.sputn(data, writ) == writ);
1795         total += writ;
1796     }
1797     return total;
1798 }
1799
1800 #ifndef LDID_NOPLIST
1801 static plist_t plist(const std::string &data) {
1802     plist_t plist(NULL);
1803     if (Starts(data, "bplist00"))
1804         plist_from_bin(data.data(), data.size(), &plist);
1805     else
1806         plist_from_xml(data.data(), data.size(), &plist);
1807     _assert(plist != NULL);
1808     return plist;
1809 }
1810
1811 static void plist_d(std::streambuf &buffer, const Functor<void (plist_t)> &code) {
1812     std::stringbuf data;
1813     copy(buffer, data);
1814     auto node(plist(data.str()));
1815     _scope({ plist_free(node); });
1816     _assert(plist_get_node_type(node) == PLIST_DICT);
1817     code(node);
1818 }
1819
1820 static std::string plist_s(plist_t node) {
1821     _assert(node != NULL);
1822     _assert(plist_get_node_type(node) == PLIST_STRING);
1823     char *data;
1824     plist_get_string_val(node, &data);
1825     _scope({ free(data); });
1826     return data;
1827 }
1828 #endif
1829
1830 enum Mode {
1831     NoMode,
1832     OptionalMode,
1833     OmitMode,
1834     NestedMode,
1835     TopMode,
1836 };
1837
1838 class Expression {
1839   private:
1840     regex_t regex_;
1841
1842   public:
1843     Expression(const std::string &code) {
1844         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED | REG_NOSUB) == 0, "regcomp()");
1845     }
1846
1847     ~Expression() {
1848         regfree(&regex_);
1849     }
1850
1851     bool operator ()(const std::string &data) const {
1852         auto value(regexec(&regex_, data.c_str(), 0, NULL, 0));
1853         if (value == REG_NOMATCH)
1854             return false;
1855         _assert_(value == 0, "regexec()");
1856         return true;
1857     }
1858 };
1859
1860 struct Rule {
1861     unsigned weight_;
1862     Mode mode_;
1863     std::string code_;
1864
1865     mutable std::auto_ptr<Expression> regex_;
1866
1867     Rule(unsigned weight, Mode mode, const std::string &code) :
1868         weight_(weight),
1869         mode_(mode),
1870         code_(code)
1871     {
1872     }
1873
1874     Rule(const Rule &rhs) :
1875         weight_(rhs.weight_),
1876         mode_(rhs.mode_),
1877         code_(rhs.code_)
1878     {
1879     }
1880
1881     void Compile() const {
1882         regex_.reset(new Expression(code_));
1883     }
1884
1885     bool operator ()(const std::string &data) const {
1886         _assert(regex_.get() != NULL);
1887         return (*regex_)(data);
1888     }
1889
1890     bool operator <(const Rule &rhs) const {
1891         if (weight_ > rhs.weight_)
1892             return true;
1893         if (weight_ < rhs.weight_)
1894             return false;
1895         return mode_ > rhs.mode_;
1896     }
1897 };
1898
1899 struct RuleCode {
1900     bool operator ()(const Rule *lhs, const Rule *rhs) const {
1901         return lhs->code_ < rhs->code_;
1902     }
1903 };
1904
1905 #ifndef LDID_NOPLIST
1906 void Sign(std::streambuf &buffer, std::vector<char> &hash, std::streambuf &save, const std::string &identifier, const std::string &entitlements, const std::string &key, const Slots &slots) {
1907     // XXX: this is a miserable fail
1908     std::stringbuf temp;
1909     copy(buffer, temp);
1910     auto data(temp.str());
1911
1912     HashProxy proxy(hash, save);
1913     Sign(data.data(), data.size(), proxy, identifier, entitlements, key, slots);
1914 }
1915
1916 std::string Bundle(const std::string &root, Folder &folder, const std::string &key, std::map<std::string, std::vector<char>> &remote, const std::string &entitlements) {
1917     std::string executable;
1918     std::string identifier;
1919
1920     static const std::string info("Info.plist");
1921
1922     _assert_(folder.Open(info, fun([&](std::streambuf &buffer) {
1923         plist_d(buffer, fun([&](plist_t node) {
1924             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
1925             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
1926         }));
1927     })), "open(): Info.plist");
1928
1929     static const std::string directory("_CodeSignature/");
1930     static const std::string signature(directory + "CodeResources");
1931
1932     std::map<std::string, std::multiset<Rule>> versions;
1933
1934     auto &rules1(versions[""]);
1935     auto &rules2(versions["2"]);
1936
1937     folder.Open(signature, fun([&](std::streambuf &buffer) {
1938         plist_d(buffer, fun([&](plist_t node) {
1939             // XXX: maybe attempt to preserve existing rules
1940         }));
1941     }));
1942
1943     if (true) {
1944         rules1.insert(Rule{1, NoMode, "^"});
1945         rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1946         rules1.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
1947         rules1.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
1948         rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1949         rules1.insert(Rule{1, NoMode, "^version.plist$"});
1950     }
1951
1952     if (true) {
1953         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
1954         rules2.insert(Rule{20, NoMode, "^"});
1955         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
1956         rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1957         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
1958         rules2.insert(Rule{1, NoMode, "^.*"});
1959         rules2.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
1960         rules2.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
1961         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
1962         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
1963         rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1964         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
1965         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
1966         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
1967     }
1968
1969     std::map<std::string, std::vector<char>> local;
1970
1971     static Expression nested("^PlugIns/[^/]*\\.appex/Info\\.plist$");
1972     static Expression dylib("^[^/]*\\.dylib$");
1973
1974     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
1975         if (!nested(name))
1976             return;
1977         auto bundle(root + Split(name).dir);
1978         SubFolder subfolder(folder, bundle);
1979         Bundle(bundle, subfolder, key, local, "");
1980     }));
1981
1982     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
1983         // BundleDiskRep::adjustResources -> builder.addExclusion
1984         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
1985             return;
1986
1987         auto &hash(local[name]);
1988         if (!hash.empty())
1989             return;
1990
1991         code(fun([&](std::streambuf &data, std::streambuf &save) {
1992             if (dylib(name)) {
1993                 Slots slots;
1994                 Sign(data, hash, save, identifier, "", key, slots);
1995             } else {
1996                 HashProxy proxy(hash, save);
1997                 copy(data, proxy);
1998             }
1999         }));
2000
2001         _assert(hash.size() == LDID_SHA1_DIGEST_LENGTH);
2002     }));
2003
2004     auto plist(plist_new_dict());
2005     _scope({ plist_free(plist); });
2006
2007     for (const auto &version : versions) {
2008         auto files(plist_new_dict());
2009         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2010
2011         for (const auto &rule : version.second)
2012             rule.Compile();
2013
2014         for (const auto &hash : local)
2015             for (const auto &rule : version.second)
2016                 if (rule(hash.first)) {
2017                     if (rule.mode_ == NoMode)
2018                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(hash.second.data(), hash.second.size()));
2019                     else if (rule.mode_ == OptionalMode) {
2020                         auto entry(plist_new_dict());
2021                         plist_dict_set_item(entry, "hash", plist_new_data(hash.second.data(), hash.second.size()));
2022                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2023                         plist_dict_set_item(files, hash.first.c_str(), entry);
2024                     }
2025
2026                     break;
2027                 }
2028     }
2029
2030     for (const auto &version : versions) {
2031         auto rules(plist_new_dict());
2032         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2033
2034         std::multiset<const Rule *, RuleCode> ordered;
2035         for (const auto &rule : version.second)
2036             ordered.insert(&rule);
2037
2038         for (const auto &rule : ordered)
2039             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2040                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2041             else {
2042                 auto entry(plist_new_dict());
2043                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2044
2045                 switch (rule->mode_) {
2046                     case NoMode:
2047                         break;
2048                     case OmitMode:
2049                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2050                         break;
2051                     case OptionalMode:
2052                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2053                         break;
2054                     case NestedMode:
2055                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2056                         break;
2057                     case TopMode:
2058                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2059                         break;
2060                 }
2061
2062                 if (rule->weight_ >= 10000)
2063                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2064                 else if (rule->weight_ != 1)
2065                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2066             }
2067     }
2068
2069     folder.Save(signature, fun([&](std::streambuf &save) {
2070         HashProxy proxy(local[signature], save);
2071         char *xml(NULL);
2072         uint32_t size;
2073         plist_to_xml(plist, &xml, &size);
2074         _scope({ free(xml); });
2075         put(proxy, xml, size);
2076     }));
2077
2078     folder.Open(executable, fun([&](std::streambuf &buffer) {
2079         folder.Save(executable, fun([&](std::streambuf &save) {
2080             Slots slots;
2081             slots[1] = local.at(info);
2082             slots[3] = local.at(signature);
2083             Sign(buffer, local[executable], save, identifier, entitlements, key, slots);
2084         }));
2085     }));
2086
2087     for (const auto &hash : local)
2088         remote[root + hash.first] = hash.second;
2089
2090     return executable;
2091 }
2092 #endif
2093
2094 #endif
2095 }
2096
2097 #ifndef LDID_NOTOOLS
2098 int main(int argc, char *argv[]) {
2099 #ifndef LDID_NOSMIME
2100     OpenSSL_add_all_algorithms();
2101 #endif
2102
2103     union {
2104         uint16_t word;
2105         uint8_t byte[2];
2106     } endian = {1};
2107
2108     little_ = endian.byte[0];
2109
2110     bool flag_r(false);
2111     bool flag_e(false);
2112
2113 #ifndef LDID_NOFLAGT
2114     bool flag_T(false);
2115 #endif
2116
2117     bool flag_S(false);
2118     bool flag_s(false);
2119
2120     bool flag_D(false);
2121
2122     bool flag_A(false);
2123     bool flag_a(false);
2124
2125     bool flag_u(false);
2126
2127     uint32_t flag_CPUType(_not(uint32_t));
2128     uint32_t flag_CPUSubtype(_not(uint32_t));
2129
2130     const char *flag_I(NULL);
2131
2132 #ifndef LDID_NOFLAGT
2133     bool timeh(false);
2134     uint32_t timev(0);
2135 #endif
2136
2137     Map entitlements;
2138     Map key;
2139     ldid::Slots slots;
2140
2141     std::vector<std::string> files;
2142
2143     if (argc == 1) {
2144         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2145         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2146         fprintf(stderr, "   %s -S cat\n", argv[0]);
2147         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2148         exit(0);
2149     }
2150
2151     for (int argi(1); argi != argc; ++argi)
2152         if (argv[argi][0] != '-')
2153             files.push_back(argv[argi]);
2154         else switch (argv[argi][1]) {
2155             case 'r':
2156                 _assert(!flag_s);
2157                 _assert(!flag_S);
2158                 flag_r = true;
2159             break;
2160
2161             case 'e': flag_e = true; break;
2162
2163             case 'E': {
2164                 const char *slot = argv[argi] + 2;
2165                 const char *colon = strchr(slot, ':');
2166                 _assert(colon != NULL);
2167                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2168                 char *arge;
2169                 unsigned number(strtoul(slot, &arge, 0));
2170                 _assert(arge == colon);
2171                 sha1(slots[number], file.data(), file.size());
2172             } break;
2173
2174             case 'D': flag_D = true; break;
2175
2176             case 'a': flag_a = true; break;
2177
2178             case 'A':
2179                 _assert(!flag_A);
2180                 flag_A = true;
2181                 if (argv[argi][2] != '\0') {
2182                     const char *cpu = argv[argi] + 2;
2183                     const char *colon = strchr(cpu, ':');
2184                     _assert(colon != NULL);
2185                     char *arge;
2186                     flag_CPUType = strtoul(cpu, &arge, 0);
2187                     _assert(arge == colon);
2188                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2189                     _assert(arge == argv[argi] + strlen(argv[argi]));
2190                 }
2191             break;
2192
2193             case 's':
2194                 _assert(!flag_r);
2195                 _assert(!flag_S);
2196                 flag_s = true;
2197             break;
2198
2199             case 'S':
2200                 _assert(!flag_r);
2201                 _assert(!flag_s);
2202                 flag_S = true;
2203                 if (argv[argi][2] != '\0') {
2204                     const char *xml = argv[argi] + 2;
2205                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2206                 }
2207             break;
2208
2209             case 'K':
2210                 if (argv[argi][2] != '\0')
2211                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2212             break;
2213
2214 #ifndef LDID_NOFLAGT
2215             case 'T': {
2216                 flag_T = true;
2217                 if (argv[argi][2] == '-')
2218                     timeh = true;
2219                 else {
2220                     char *arge;
2221                     timev = strtoul(argv[argi] + 2, &arge, 0);
2222                     _assert(arge == argv[argi] + strlen(argv[argi]));
2223                 }
2224             } break;
2225 #endif
2226
2227             case 'u': {
2228                 flag_u = true;
2229             } break;
2230
2231             case 'I': {
2232                 flag_I = argv[argi] + 2;
2233             } break;
2234
2235             default:
2236                 goto usage;
2237             break;
2238         }
2239
2240     _assert(flag_S || key.empty());
2241     _assert(flag_S || flag_I == NULL);
2242
2243     if (files.empty()) usage: {
2244         exit(0);
2245     }
2246
2247     size_t filei(0), filee(0);
2248     _foreach (file, files) try {
2249         std::string path(file);
2250
2251         struct stat info;
2252         _syscall(stat(path.c_str(), &info));
2253
2254         if (S_ISDIR(info.st_mode)) {
2255 #ifndef LDID_NOPLIST
2256             _assert(!flag_r);
2257             ldid::DiskFolder folder(path);
2258             std::map<std::string, std::vector<char>> hashes;
2259             path += "/" + Bundle("", folder, key, hashes, entitlements);
2260 #else
2261             _assert(false);
2262 #endif
2263         } else if (flag_S || flag_r) {
2264             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2265
2266             std::filebuf output;
2267             Split split(path);
2268             auto temp(Temporary(output, split));
2269
2270             if (flag_r)
2271                 ldid::Unsign(input.data(), input.size(), output);
2272             else {
2273                 std::string identifier(flag_I ?: split.base.c_str());
2274                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, key, slots);
2275             }
2276
2277             Commit(path, temp);
2278         }
2279
2280         bool modify(false);
2281 #ifndef LDID_NOFLAGT
2282         if (flag_T)
2283             modify = true;
2284 #endif
2285         if (flag_s)
2286             modify = true;
2287
2288         Map mapping(path, modify);
2289         FatHeader fat_header(mapping.data(), mapping.size());
2290
2291         _foreach (mach_header, fat_header.GetMachHeaders()) {
2292             struct linkedit_data_command *signature(NULL);
2293             struct encryption_info_command *encryption(NULL);
2294
2295             if (flag_A) {
2296                 if (mach_header.GetCPUType() != flag_CPUType)
2297                     continue;
2298                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2299                     continue;
2300             }
2301
2302             if (flag_a)
2303                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2304
2305             _foreach (load_command, mach_header.GetLoadCommands()) {
2306                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2307
2308                 if (false);
2309                 else if (cmd == LC_CODE_SIGNATURE)
2310                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2311                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2312                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2313                 else if (cmd == LC_LOAD_DYLIB) {
2314                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2315                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2316
2317                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2318                         if (flag_u) {
2319                             Version version;
2320                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2321                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2322                         }
2323                     }
2324                 }
2325 #ifndef LDID_NOFLAGT
2326                 else if (cmd == LC_ID_DYLIB) {
2327                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2328
2329                     if (flag_T) {
2330                         uint32_t timed;
2331
2332                         if (!timeh)
2333                             timed = timev;
2334                         else {
2335                             dylib_command->dylib.timestamp = 0;
2336                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2337                         }
2338
2339                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2340                     }
2341                 }
2342 #endif
2343             }
2344
2345             if (flag_D) {
2346                 _assert(encryption != NULL);
2347                 encryption->cryptid = mach_header.Swap(0);
2348             }
2349
2350             if (flag_e) {
2351                 _assert(signature != NULL);
2352
2353                 uint32_t data = mach_header.Swap(signature->dataoff);
2354
2355                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2356                 uint8_t *blob = top + data;
2357                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2358
2359                 for (size_t index(0); index != Swap(super->count); ++index)
2360                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2361                         uint32_t begin = Swap(super->index[index].offset);
2362                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2363                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2364                     }
2365             }
2366
2367             if (flag_s) {
2368                 _assert(signature != NULL);
2369
2370                 uint32_t data = mach_header.Swap(signature->dataoff);
2371
2372                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2373                 uint8_t *blob = top + data;
2374                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2375
2376                 for (size_t index(0); index != Swap(super->count); ++index)
2377                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2378                         uint32_t begin = Swap(super->index[index].offset);
2379                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
2380
2381                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2382                         uint32_t pages = Swap(directory->nCodeSlots);
2383
2384                         if (pages != 1)
2385                             for (size_t i = 0; i != pages - 1; ++i)
2386                                 sha1(hashes[i], top + PageSize_ * i, PageSize_);
2387                         if (pages != 0)
2388                             sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1);
2389                     }
2390             }
2391         }
2392
2393         ++filei;
2394     } catch (const char *) {
2395         ++filee;
2396         ++filei;
2397     }
2398
2399     return filee;
2400 }
2401 #endif