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 } _packed;
 429
 430 struct linkedit_data_command {
 431     uint32_t cmd;
 432     uint32_t cmdsize;
 433     uint32_t dataoff;
 434     uint32_t datasize;
 435 } _packed;
 436
 437 struct encryption_info_command {
 438     uint32_t cmd;
 439     uint32_t cmdsize;
 440     uint32_t cryptoff;
 441     uint32_t cryptsize;
 442     uint32_t cryptid;
 443 } _packed;
 444
 445 #define BIND_OPCODE_MASK                             0xf0
 446 #define BIND_IMMEDIATE_MASK                          0x0f
 447 #define BIND_OPCODE_DONE                             0x00
 448 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 449 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 450 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 451 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 452 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 453 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 454 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 455 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 456 #define BIND_OPCODE_DO_BIND                          0x90
 457 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 458 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 459 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 460
 461 inline void get(std::streambuf &stream, void *data, size_t size) {
 462     _assert(stream.sgetn(static_cast<char *>(data), size) == size);
 463 }
 464
 465 inline void put(std::streambuf &stream, const void *data, size_t size) {
 466     _assert(stream.sputn(static_cast<const char *>(data), size) == size);
 467 }
 468
 469 inline void pad(std::streambuf &stream, size_t size) {
 470     char padding[size];
 471     memset(padding, 0, size);
 472     put(stream, padding, size);
 473 }
 474
 475 template <typename Type_>
 476 Type_ Align(Type_ value, size_t align) {
 477     value += align - 1;
 478     value /= align;
 479     value *= align;
 480     return value;
 481 }
 482
 483 static const uint8_t PageShift_(0x0c);
 484 static const uint32_t PageSize_(1 << PageShift_);
 485
 486 static inline uint16_t Swap_(uint16_t value) {
 487     return
 488         ((value >>  8) & 0x00ff) |
 489         ((value <<  8) & 0xff00);
 490 }
 491
 492 static inline uint32_t Swap_(uint32_t value) {
 493     value = ((value >>  8) & 0x00ff00ff) |
 494             ((value <<  8) & 0xff00ff00);
 495     value = ((value >> 16) & 0x0000ffff) |
 496             ((value << 16) & 0xffff0000);
 497     return value;
 498 }
 499
 500 static inline uint64_t Swap_(uint64_t value) {
 501     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 502     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 503     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 504     return value;
 505 }
 506
 507 static inline int16_t Swap_(int16_t value) {
 508     return Swap_(static_cast<uint16_t>(value));
 509 }
 510
 511 static inline int32_t Swap_(int32_t value) {
 512     return Swap_(static_cast<uint32_t>(value));
 513 }
 514
 515 static inline int64_t Swap_(int64_t value) {
 516     return Swap_(static_cast<uint64_t>(value));
 517 }
 518
 519 static bool little_(true);
 520
 521 static inline uint16_t Swap(uint16_t value) {
 522     return little_ ? Swap_(value) : value;
 523 }
 524
 525 static inline uint32_t Swap(uint32_t value) {
 526     return little_ ? Swap_(value) : value;
 527 }
 528
 529 static inline uint64_t Swap(uint64_t value) {
 530     return little_ ? Swap_(value) : value;
 531 }
 532
 533 static inline int16_t Swap(int16_t value) {
 534     return Swap(static_cast<uint16_t>(value));
 535 }
 536
 537 static inline int32_t Swap(int32_t value) {
 538     return Swap(static_cast<uint32_t>(value));
 539 }
 540
 541 static inline int64_t Swap(int64_t value) {
 542     return Swap(static_cast<uint64_t>(value));
 543 }
 544
 545 class Swapped {
 546   protected:
 547     bool swapped_;
 548
 549     Swapped() :
 550         swapped_(false)
 551     {
 552     }
 553
 554   public:
 555     Swapped(bool swapped) :
 556         swapped_(swapped)
 557     {
 558     }
 559
 560     template <typename Type_>
 561     Type_ Swap(Type_ value) const {
 562         return swapped_ ? Swap_(value) : value;
 563     }
 564 };
 565
 566 class Data :
 567     public Swapped
 568 {
 569   private:
 570     void *base_;
 571     size_t size_;
 572
 573   public:
 574     Data(void *base, size_t size) :
 575         base_(base),
 576         size_(size)
 577     {
 578     }
 579
 580     void *GetBase() const {
 581         return base_;
 582     }
 583
 584     size_t GetSize() const {
 585         return size_;
 586     }
 587 };
 588
 589 class MachHeader :
 590     public Data
 591 {
 592   private:
 593     bool bits64_;
 594
 595     struct mach_header *mach_header_;
 596     struct load_command *load_command_;
 597
 598   public:
 599     MachHeader(void *base, size_t size) :
 600         Data(base, size)
 601     {
 602         mach_header_ = (mach_header *) base;
 603
 604         switch (Swap(mach_header_->magic)) {
 605             case MH_CIGAM:
 606                 swapped_ = !swapped_;
 607             case MH_MAGIC:
 608                 bits64_ = false;
 609             break;
 610
 611             case MH_CIGAM_64:
 612                 swapped_ = !swapped_;
 613             case MH_MAGIC_64:
 614                 bits64_ = true;
 615             break;
 616
 617             default:
 618                 _assert(false);
 619         }
 620
 621         void *post = mach_header_ + 1;
 622         if (bits64_)
 623             post = (uint32_t *) post + 1;
 624         load_command_ = (struct load_command *) post;
 625
 626         _assert(
 627             Swap(mach_header_->filetype) == MH_EXECUTE ||
 628             Swap(mach_header_->filetype) == MH_DYLIB ||
 629             Swap(mach_header_->filetype) == MH_BUNDLE
 630         );
 631     }
 632
 633     bool Bits64() const {
 634         return bits64_;
 635     }
 636
 637     struct mach_header *operator ->() const {
 638         return mach_header_;
 639     }
 640
 641     operator struct mach_header *() const {
 642         return mach_header_;
 643     }
 644
 645     uint32_t GetCPUType() const {
 646         return Swap(mach_header_->cputype);
 647     }
 648
 649     uint32_t GetCPUSubtype() const {
 650         return Swap(mach_header_->cpusubtype) & 0xff;
 651     }
 652
 653     struct load_command *GetLoadCommand() const {
 654         return load_command_;
 655     }
 656
 657     std::vector<struct load_command *> GetLoadCommands() const {
 658         std::vector<struct load_command *> load_commands;
 659
 660         struct load_command *load_command = load_command_;
 661         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 662             load_commands.push_back(load_command);
 663             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 664         }
 665
 666         return load_commands;
 667     }
 668
 669     template <typename Target_>
 670     Target_ *GetOffset(uint32_t offset) const {
 671         return reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_);
 672     }
 673 };
 674
 675 class FatMachHeader :
 676     public MachHeader
 677 {
 678   private:
 679     fat_arch *fat_arch_;
 680
 681   public:
 682     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 683         MachHeader(base, size),
 684         fat_arch_(fat_arch)
 685     {
 686     }
 687
 688     fat_arch *GetFatArch() const {
 689         return fat_arch_;
 690     }
 691 };
 692
 693 class FatHeader :
 694     public Data
 695 {
 696   private:
 697     fat_header *fat_header_;
 698     std::vector<FatMachHeader> mach_headers_;
 699
 700   public:
 701     FatHeader(void *base, size_t size) :
 702         Data(base, size)
 703     {
 704         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 705
 706         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 707             swapped_ = !swapped_;
 708             goto fat;
 709         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 710             fat_header_ = NULL;
 711             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 712         } else fat: {
 713             size_t fat_narch = Swap(fat_header_->nfat_arch);
 714             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 715             size_t arch;
 716             for (arch = 0; arch != fat_narch; ++arch) {
 717                 uint32_t arch_offset = Swap(fat_arch->offset);
 718                 uint32_t arch_size = Swap(fat_arch->size);
 719                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 720                 ++fat_arch;
 721             }
 722         }
 723     }
 724
 725     std::vector<FatMachHeader> &GetMachHeaders() {
 726         return mach_headers_;
 727     }
 728
 729     bool IsFat() const {
 730         return fat_header_ != NULL;
 731     }
 732
 733     struct fat_header *operator ->() const {
 734         return fat_header_;
 735     }
 736
 737     operator struct fat_header *() const {
 738         return fat_header_;
 739     }
 740 };
 741
 742 #define CSMAGIC_REQUIREMENT            uint32_t(0xfade0c00)
 743 #define CSMAGIC_REQUIREMENTS           uint32_t(0xfade0c01)
 744 #define CSMAGIC_CODEDIRECTORY          uint32_t(0xfade0c02)
 745 #define CSMAGIC_EMBEDDED_SIGNATURE     uint32_t(0xfade0cc0)
 746 #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02)
 747 #define CSMAGIC_EMBEDDED_ENTITLEMENTS  uint32_t(0xfade7171)
 748 #define CSMAGIC_DETACHED_SIGNATURE     uint32_t(0xfade0cc1)
 749 #define CSMAGIC_BLOBWRAPPER            uint32_t(0xfade0b01)
 750
 751 #define CSSLOT_CODEDIRECTORY uint32_t(0x00000)
 752 #define CSSLOT_INFOSLOT      uint32_t(0x00001)
 753 #define CSSLOT_REQUIREMENTS  uint32_t(0x00002)
 754 #define CSSLOT_RESOURCEDIR   uint32_t(0x00003)
 755 #define CSSLOT_APPLICATION   uint32_t(0x00004)
 756 #define CSSLOT_ENTITLEMENTS  uint32_t(0x00005)
 757
 758 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 759
 760 #define CS_HASHTYPE_SHA1 1
 761
 762 struct BlobIndex {
 763     uint32_t type;
 764     uint32_t offset;
 765 } _packed;
 766
 767 struct Blob {
 768     uint32_t magic;
 769     uint32_t length;
 770 } _packed;
 771
 772 struct SuperBlob {
 773     struct Blob blob;
 774     uint32_t count;
 775     struct BlobIndex index[];
 776 } _packed;
 777
 778 struct CodeDirectory {
 779     uint32_t version;
 780     uint32_t flags;
 781     uint32_t hashOffset;
 782     uint32_t identOffset;
 783     uint32_t nSpecialSlots;
 784     uint32_t nCodeSlots;
 785     uint32_t codeLimit;
 786     uint8_t hashSize;
 787     uint8_t hashType;
 788     uint8_t spare1;
 789     uint8_t pageSize;
 790     uint32_t spare2;
 791 } _packed;
 792
 793 #ifndef LDID_NOFLAGT
 794 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 795 #endif
 796
 797 static void sha1(uint8_t *hash, const void *data, size_t size) {
 798     LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 799 }
 800
 801 struct CodesignAllocation {
 802     FatMachHeader mach_header_;
 803     uint32_t offset_;
 804     uint32_t size_;
 805     uint32_t limit_;
 806     uint32_t alloc_;
 807     uint32_t align_;
 808
 809     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
 810         mach_header_(mach_header),
 811         offset_(offset),
 812         size_(size),
 813         limit_(limit),
 814         alloc_(alloc),
 815         align_(align)
 816     {
 817     }
 818 };
 819
 820 #ifndef LDID_NOTOOLS
 821 class File {
 822   private:
 823     int file_;
 824
 825   public:
 826     File() :
 827         file_(-1)
 828     {
 829     }
 830
 831     ~File() {
 832         if (file_ != -1)
 833             _syscall(close(file_));
 834     }
 835
 836     void open(const char *path, int flags) {
 837         _assert(file_ == -1);
 838         file_ = _syscall(::open(path, flags));
 839     }
 840
 841     int file() const {
 842         return file_;
 843     }
 844 };
 845
 846 class Map {
 847   private:
 848     File file_;
 849     void *data_;
 850     size_t size_;
 851
 852     void clear() {
 853         if (data_ == NULL)
 854             return;
 855         _syscall(munmap(data_, size_));
 856         data_ = NULL;
 857         size_ = 0;
 858     }
 859
 860   public:
 861     Map() :
 862         data_(NULL),
 863         size_(0)
 864     {
 865     }
 866
 867     Map(const std::string &path, int oflag, int pflag, int mflag) :
 868         Map()
 869     {
 870         open(path, oflag, pflag, mflag);
 871     }
 872
 873     Map(const std::string &path, bool edit) :
 874         Map()
 875     {
 876         open(path, edit);
 877     }
 878
 879     ~Map() {
 880         clear();
 881     }
 882
 883     bool empty() const {
 884         return data_ == NULL;
 885     }
 886
 887     void open(const std::string &path, int oflag, int pflag, int mflag) {
 888         clear();
 889
 890         file_.open(path.c_str(), oflag);
 891         int file(file_.file());
 892
 893         struct stat stat;
 894         _syscall(fstat(file, &stat));
 895         size_ = stat.st_size;
 896
 897         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
 898     }
 899
 900     void open(const std::string &path, bool edit) {
 901         if (edit)
 902             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
 903         else
 904             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
 905     }
 906
 907     void *data() const {
 908         return data_;
 909     }
 910
 911     size_t size() const {
 912         return size_;
 913     }
 914
 915     operator std::string() const {
 916         return std::string(static_cast<char *>(data_), size_);
 917     }
 918 };
 919 #endif
 920
 921 namespace ldid {
 922
 923 static void Allocate(const void *idata, size_t isize, std::streambuf &output, const Functor<size_t (size_t)> &allocate, const Functor<size_t (std::streambuf &output, size_t, const std::string &, const char *)> &save) {
 924     FatHeader source(const_cast<void *>(idata), isize);
 925
 926     size_t offset(0);
 927     if (source.IsFat())
 928         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
 929
 930     std::vector<CodesignAllocation> allocations;
 931     _foreach (mach_header, source.GetMachHeaders()) {
 932         struct linkedit_data_command *signature(NULL);
 933         struct symtab_command *symtab(NULL);
 934
 935         _foreach (load_command, mach_header.GetLoadCommands()) {
 936             uint32_t cmd(mach_header.Swap(load_command->cmd));
 937             if (false);
 938             else if (cmd == LC_CODE_SIGNATURE)
 939                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
 940             else if (cmd == LC_SYMTAB)
 941                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
 942         }
 943
 944         size_t size;
 945         if (signature == NULL)
 946             size = mach_header.GetSize();
 947         else {
 948             size = mach_header.Swap(signature->dataoff);
 949             _assert(size <= mach_header.GetSize());
 950         }
 951
 952         if (symtab != NULL) {
 953             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
 954             _assert(end <= size);
 955             _assert(end >= size - 0x10);
 956             size = end;
 957         }
 958
 959         size_t alloc(allocate(size));
 960
 961         auto *fat_arch(mach_header.GetFatArch());
 962         uint32_t align;
 963
 964         if (fat_arch != NULL)
 965             align = source.Swap(fat_arch->align);
 966         else switch (mach_header.GetCPUType()) {
 967             case CPU_TYPE_POWERPC:
 968             case CPU_TYPE_POWERPC64:
 969             case CPU_TYPE_X86:
 970             case CPU_TYPE_X86_64:
 971                 align = 0xc;
 972                 break;
 973             case CPU_TYPE_ARM:
 974             case CPU_TYPE_ARM64:
 975                 align = 0xe;
 976                 break;
 977             default:
 978                 align = 0x0;
 979                 break;
 980         }
 981
 982         offset = Align(offset, 1 << align);
 983
 984         uint32_t limit(size);
 985         if (alloc != 0)
 986             limit = Align(limit, 0x10);
 987
 988         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
 989         offset += size + alloc;
 990         offset = Align(offset, 0x10);
 991     }
 992
 993     size_t position(0);
 994
 995     if (source.IsFat()) {
 996         fat_header fat_header;
 997         fat_header.magic = Swap(FAT_MAGIC);
 998         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
 999         put(output, &fat_header, sizeof(fat_header));
1000         position += sizeof(fat_header);
1001
1002         _foreach (allocation, allocations) {
1003             auto &mach_header(allocation.mach_header_);
1004
1005             fat_arch fat_arch;
1006             fat_arch.cputype = Swap(mach_header->cputype);
1007             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1008             fat_arch.offset = Swap(allocation.offset_);
1009             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1010             fat_arch.align = Swap(allocation.align_);
1011             put(output, &fat_arch, sizeof(fat_arch));
1012             position += sizeof(fat_arch);
1013         }
1014     }
1015
1016     _foreach (allocation, allocations) {
1017         auto &mach_header(allocation.mach_header_);
1018
1019         pad(output, allocation.offset_ - position);
1020         position = allocation.offset_;
1021
1022         std::vector<std::string> commands;
1023
1024         _foreach (load_command, mach_header.GetLoadCommands()) {
1025             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1026
1027             switch (mach_header.Swap(load_command->cmd)) {
1028                 case LC_CODE_SIGNATURE:
1029                     continue;
1030                 break;
1031
1032                 case LC_SEGMENT: {
1033                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1034                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1035                         break;
1036                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1037                     segment_command->filesize = size;
1038                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1039                 } break;
1040
1041                 case LC_SEGMENT_64: {
1042                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1043                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1044                         break;
1045                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1046                     segment_command->filesize = size;
1047                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1048                 } break;
1049             }
1050
1051             commands.push_back(copy);
1052         }
1053
1054         if (allocation.alloc_ != 0) {
1055             linkedit_data_command signature;
1056             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1057             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1058             signature.dataoff = mach_header.Swap(allocation.limit_);
1059             signature.datasize = mach_header.Swap(allocation.alloc_);
1060             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1061         }
1062
1063         size_t begin(position);
1064
1065         uint32_t after(0);
1066         _foreach(command, commands)
1067             after += command.size();
1068
1069         std::stringbuf altern;
1070
1071         struct mach_header header(*mach_header);
1072         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1073         header.sizeofcmds = mach_header.Swap(after);
1074         put(output, &header, sizeof(header));
1075         put(altern, &header, sizeof(header));
1076         position += sizeof(header);
1077
1078         if (mach_header.Bits64()) {
1079             auto pad(mach_header.Swap(uint32_t(0)));
1080             put(output, &pad, sizeof(pad));
1081             put(altern, &pad, sizeof(pad));
1082             position += sizeof(pad);
1083         }
1084
1085         _foreach(command, commands) {
1086             put(output, command.data(), command.size());
1087             put(altern, command.data(), command.size());
1088             position += command.size();
1089         }
1090
1091         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1092         if (before > after) {
1093             pad(output, before - after);
1094             pad(altern, before - after);
1095             position += before - after;
1096         }
1097
1098         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1099
1100         std::string overlap(altern.str());
1101         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1102
1103         put(output, top + (position - begin), allocation.size_ - (position - begin));
1104         position = begin + allocation.size_;
1105
1106         pad(output, allocation.limit_ - allocation.size_);
1107         position += allocation.limit_ - allocation.size_;
1108
1109         size_t saved(save(output, allocation.limit_, overlap, top));
1110         if (allocation.alloc_ > saved)
1111             pad(output, allocation.alloc_ - saved);
1112         position += allocation.alloc_;
1113     }
1114 }
1115
1116 }
1117
1118 typedef std::map<uint32_t, std::string> Blobs;
1119
1120 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1121     auto value(buffer.str());
1122     std::swap(blobs[slot], value);
1123 }
1124
1125 static void insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1126     auto value(buffer.str());
1127     Blob blob;
1128     blob.magic = Swap(magic);
1129     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1130     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1131     std::swap(blobs[slot], value);
1132 }
1133
1134 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1135     size_t total(0);
1136     _foreach (blob, blobs)
1137         total += blob.second.size();
1138
1139     struct SuperBlob super;
1140     super.blob.magic = Swap(magic);
1141     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1142     super.count = Swap(uint32_t(blobs.size()));
1143     put(output, &super, sizeof(super));
1144
1145     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1146
1147     _foreach (blob, blobs) {
1148         BlobIndex index;
1149         index.type = Swap(blob.first);
1150         index.offset = Swap(uint32_t(offset));
1151         put(output, &index, sizeof(index));
1152         offset += blob.second.size();
1153     }
1154
1155     _foreach (blob, blobs)
1156         put(output, blob.second.data(), blob.second.size());
1157
1158     return offset;
1159 }
1160
1161 #ifndef LDID_NOSMIME
1162 class Buffer {
1163   private:
1164     BIO *bio_;
1165
1166   public:
1167     Buffer(BIO *bio) :
1168         bio_(bio)
1169     {
1170         _assert(bio_ != NULL);
1171     }
1172
1173     Buffer() :
1174         bio_(BIO_new(BIO_s_mem()))
1175     {
1176     }
1177
1178     Buffer(const char *data, size_t size) :
1179         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1180     {
1181     }
1182
1183     Buffer(const std::string &data) :
1184         Buffer(data.data(), data.size())
1185     {
1186     }
1187
1188     Buffer(PKCS7 *pkcs) :
1189         Buffer()
1190     {
1191         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1192     }
1193
1194     ~Buffer() {
1195         BIO_free_all(bio_);
1196     }
1197
1198     operator BIO *() const {
1199         return bio_;
1200     }
1201
1202     explicit operator std::string() const {
1203         char *data;
1204         auto size(BIO_get_mem_data(bio_, &data));
1205         return std::string(data, size);
1206     }
1207 };
1208
1209 class Stuff {
1210   private:
1211     PKCS12 *value_;
1212     EVP_PKEY *key_;
1213     X509 *cert_;
1214     STACK_OF(X509) *ca_;
1215
1216   public:
1217     Stuff(BIO *bio) :
1218         value_(d2i_PKCS12_bio(bio, NULL)),
1219         ca_(NULL)
1220     {
1221         _assert(value_ != NULL);
1222         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1223         _assert(key_ != NULL);
1224         _assert(cert_ != NULL);
1225     }
1226
1227     Stuff(const std::string &data) :
1228         Stuff(Buffer(data))
1229     {
1230     }
1231
1232     ~Stuff() {
1233         sk_X509_pop_free(ca_, X509_free);
1234         X509_free(cert_);
1235         EVP_PKEY_free(key_);
1236         PKCS12_free(value_);
1237     }
1238
1239     operator PKCS12 *() const {
1240         return value_;
1241     }
1242
1243     operator EVP_PKEY *() const {
1244         return key_;
1245     }
1246
1247     operator X509 *() const {
1248         return cert_;
1249     }
1250
1251     operator STACK_OF(X509) *() const {
1252         return ca_;
1253     }
1254 };
1255
1256 class Signature {
1257   private:
1258     PKCS7 *value_;
1259
1260   public:
1261     Signature(const Stuff &stuff, const Buffer &data) :
1262         value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED))
1263     {
1264         _assert(value_ != NULL);
1265     }
1266
1267     ~Signature() {
1268         PKCS7_free(value_);
1269     }
1270
1271     operator PKCS7 *() const {
1272         return value_;
1273     }
1274 };
1275 #endif
1276
1277 class NullBuffer :
1278     public std::streambuf
1279 {
1280   public:
1281     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1282         return size;
1283     }
1284
1285     virtual int_type overflow(int_type next) {
1286         return next;
1287     }
1288 };
1289
1290 class HashBuffer :
1291     public std::streambuf
1292 {
1293   private:
1294     std::vector<char> &hash_;
1295     LDID_SHA1_CTX context_;
1296
1297   public:
1298     HashBuffer(std::vector<char> &hash) :
1299         hash_(hash)
1300     {
1301         LDID_SHA1_Init(&context_);
1302     }
1303
1304     ~HashBuffer() {
1305         hash_.resize(LDID_SHA1_DIGEST_LENGTH);
1306         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.data()), &context_);
1307     }
1308
1309     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1310         LDID_SHA1_Update(&context_, data, size);
1311         return size;
1312     }
1313
1314     virtual int_type overflow(int_type next) {
1315         if (next == traits_type::eof())
1316             return sync();
1317         char value(next);
1318         xsputn(&value, 1);
1319         return next;
1320     }
1321 };
1322
1323 class HashProxy :
1324     public HashBuffer
1325 {
1326   private:
1327     std::streambuf &buffer_;
1328
1329   public:
1330     HashProxy(std::vector<char> &hash, std::streambuf &buffer) :
1331         HashBuffer(hash),
1332         buffer_(buffer)
1333     {
1334     }
1335
1336     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1337         _assert(HashBuffer::xsputn(data, size) == size);
1338         return buffer_.sputn(data, size);
1339     }
1340 };
1341
1342 #ifndef LDID_NOTOOLS
1343 static bool Starts(const std::string &lhs, const std::string &rhs) {
1344     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1345 }
1346
1347 class Split {
1348   public:
1349     std::string dir;
1350     std::string base;
1351
1352     Split(const std::string &path) {
1353         size_t slash(path.rfind('/'));
1354         if (slash == std::string::npos)
1355             base = path;
1356         else {
1357             dir = path.substr(0, slash + 1);
1358             base = path.substr(slash + 1);
1359         }
1360     }
1361 };
1362
1363 static void mkdir_p(const std::string &path) {
1364     if (path.empty())
1365         return;
1366 #ifdef __WIN32__
1367     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1368         return;
1369 #else
1370     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1371         return;
1372 #endif
1373     auto slash(path.rfind('/', path.size() - 1));
1374     if (slash == std::string::npos)
1375         return;
1376     mkdir_p(path.substr(0, slash));
1377 }
1378
1379 static std::string Temporary(std::filebuf &file, const Split &split) {
1380     std::string temp(split.dir + ".ldid." + split.base);
1381     mkdir_p(split.dir);
1382     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1383     return temp;
1384 }
1385
1386 static void Commit(const std::string &path, const std::string &temp) {
1387     struct stat info;
1388     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1389 #ifndef __WIN32__
1390         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1391 #endif
1392         _syscall(chmod(temp.c_str(), info.st_mode));
1393     }
1394
1395     _syscall(rename(temp.c_str(), path.c_str()));
1396 }
1397 #endif
1398
1399 namespace ldid {
1400
1401 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) {
1402     Allocate(idata, isize, output, fun([&](size_t size) -> size_t {
1403         size_t alloc(sizeof(struct SuperBlob));
1404
1405         uint32_t special(0);
1406
1407         special = std::max(special, CSSLOT_REQUIREMENTS);
1408         alloc += sizeof(struct BlobIndex);
1409         alloc += 0xc;
1410
1411         if (!entitlements.empty()) {
1412             special = std::max(special, CSSLOT_ENTITLEMENTS);
1413             alloc += sizeof(struct BlobIndex);
1414             alloc += sizeof(struct Blob);
1415             alloc += entitlements.size();
1416         }
1417
1418         special = std::max(special, CSSLOT_CODEDIRECTORY);
1419         alloc += sizeof(struct BlobIndex);
1420         alloc += sizeof(struct Blob);
1421         alloc += sizeof(struct CodeDirectory);
1422         alloc += identifier.size() + 1;
1423
1424         if (!key.empty()) {
1425             alloc += sizeof(struct BlobIndex);
1426             alloc += sizeof(struct Blob);
1427             // XXX: this is just a "sufficiently large number"
1428             alloc += 0x3000;
1429         }
1430
1431         _foreach (slot, slots)
1432             special = std::max(special, slot.first);
1433
1434         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1435         alloc = Align(alloc + (special + normal) * LDID_SHA1_DIGEST_LENGTH, 16);
1436         return alloc;
1437     }), fun([&](std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1438         Blobs blobs;
1439
1440         if (true) {
1441             std::stringbuf data;
1442
1443             Blobs requirements;
1444             put(data, CSMAGIC_REQUIREMENTS, requirements);
1445
1446             insert(blobs, CSSLOT_REQUIREMENTS, data);
1447         }
1448
1449         if (!entitlements.empty()) {
1450             std::stringbuf data;
1451             put(data, entitlements.data(), entitlements.size());
1452             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1453         }
1454
1455         if (true) {
1456             std::stringbuf data;
1457
1458             uint32_t special(0);
1459             _foreach (blob, blobs)
1460                 special = std::max(special, blob.first);
1461             _foreach (slot, slots)
1462                 special = std::max(special, slot.first);
1463             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1464
1465             CodeDirectory directory;
1466             directory.version = Swap(uint32_t(0x00020001));
1467             directory.flags = Swap(uint32_t(0));
1468             directory.hashOffset = Swap(uint32_t(sizeof(Blob) + sizeof(CodeDirectory) + identifier.size() + 1 + LDID_SHA1_DIGEST_LENGTH * special));
1469             directory.identOffset = Swap(uint32_t(sizeof(Blob) + sizeof(CodeDirectory)));
1470             directory.nSpecialSlots = Swap(special);
1471             directory.codeLimit = Swap(uint32_t(limit));
1472             directory.nCodeSlots = Swap(normal);
1473             directory.hashSize = LDID_SHA1_DIGEST_LENGTH;
1474             directory.hashType = CS_HASHTYPE_SHA1;
1475             directory.spare1 = 0x00;
1476             directory.pageSize = PageShift_;
1477             directory.spare2 = Swap(uint32_t(0));
1478             put(data, &directory, sizeof(directory));
1479
1480             put(data, identifier.c_str(), identifier.size() + 1);
1481
1482             uint8_t storage[special + normal][LDID_SHA1_DIGEST_LENGTH];
1483             uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = storage + special;
1484
1485             memset(storage, 0, sizeof(*storage) * special);
1486
1487             _foreach (blob, blobs) {
1488                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1489                 sha1((uint8_t *) (hashes - blob.first), local, Swap(local->length));
1490             }
1491
1492             _foreach (slot, slots) {
1493                 _assert(sizeof(*hashes) == slot.second.size());
1494                 memcpy(hashes - slot.first, slot.second.data(), slot.second.size());
1495             }
1496
1497             if (normal != 1)
1498                 for (size_t i = 0; i != normal - 1; ++i)
1499                     sha1(hashes[i], (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1500             if (normal != 0)
1501                 sha1(hashes[normal - 1], top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1502
1503             put(data, storage, sizeof(storage));
1504
1505             insert(blobs, CSSLOT_CODEDIRECTORY, CSMAGIC_CODEDIRECTORY, data);
1506         }
1507
1508 #ifndef LDID_NOSMIME
1509         if (!key.empty()) {
1510             std::stringbuf data;
1511             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1512
1513             Stuff stuff(key);
1514             Buffer bio(sign);
1515
1516             Signature signature(stuff, sign);
1517             Buffer result(signature);
1518             std::string value(result);
1519             put(data, value.data(), value.size());
1520
1521             insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data);
1522         }
1523 #endif
1524
1525         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1526     }));
1527 }
1528
1529 #ifndef LDID_NOTOOLS
1530 static void Unsign(void *idata, size_t isize, std::streambuf &output) {
1531     Allocate(idata, isize, output, fun([](size_t size) -> size_t {
1532         return 0;
1533     }), fun([](std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1534         return 0;
1535     }));
1536 }
1537
1538 std::string DiskFolder::Path(const std::string &path) {
1539     return path_ + "/" + path;
1540 }
1541
1542 DiskFolder::DiskFolder(const std::string &path) :
1543     path_(path)
1544 {
1545 }
1546
1547 DiskFolder::~DiskFolder() {
1548     if (!std::uncaught_exception())
1549         for (const auto &commit : commit_)
1550             Commit(commit.first, commit.second);
1551 }
1552
1553 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) {
1554     std::string path(Path(root) + base);
1555
1556     DIR *dir(opendir(path.c_str()));
1557     _assert(dir != NULL);
1558     _scope({ _syscall(closedir(dir)); });
1559
1560     while (auto child = readdir(dir)) {
1561         std::string name(child->d_name);
1562         if (name == "." || name == "..")
1563             continue;
1564         if (Starts(name, ".ldid."))
1565             continue;
1566
1567         bool directory;
1568
1569 #ifdef __WIN32__
1570         struct stat info;
1571         _syscall(stat(path.c_str(), &info));
1572         if (false);
1573         else if (S_ISDIR(info.st_mode))
1574             directory = true;
1575         else if (S_ISREG(info.st_mode))
1576             directory = false;
1577         else
1578             _assert_(false, "st_mode=%x", info.st_mode);
1579 #else
1580         switch (child->d_type) {
1581             case DT_DIR:
1582                 directory = true;
1583                 break;
1584             case DT_REG:
1585                 directory = false;
1586                 break;
1587             default:
1588                 _assert_(false, "d_type=%u", child->d_type);
1589         }
1590 #endif
1591
1592         if (directory)
1593             Find(root, base + name + "/", code);
1594         else
1595             code(base + name, fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1596                 std::string access(root + base + name);
1597                 _assert_(Open(access, fun([&](std::streambuf &data) {
1598                     NullBuffer save;
1599                     code(data, save);
1600                 })), "open(): %s", access.c_str());
1601             }));
1602     }
1603 }
1604
1605 void DiskFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1606     std::filebuf save;
1607     auto from(Path(path));
1608     commit_[from] = Temporary(save, from);
1609     code(save);
1610 }
1611
1612 bool DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1613     std::filebuf data;
1614     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
1615     if (result == NULL)
1616         return false;
1617     _assert(result == &data);
1618     code(data);
1619     return true;
1620 }
1621
1622 void DiskFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)>&code) {
1623     Find(path, "", code);
1624 }
1625 #endif
1626
1627 SubFolder::SubFolder(Folder &parent, const std::string &path) :
1628     parent_(parent),
1629     path_(path)
1630 {
1631 }
1632
1633 void SubFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1634     return parent_.Save(path_ + path, code);
1635 }
1636
1637 bool SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1638     return parent_.Open(path_ + path, code);
1639 }
1640
1641 void SubFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1642     return parent_.Find(path_ + path, code);
1643 }
1644
1645 UnionFolder::UnionFolder(Folder &parent) :
1646     parent_(parent)
1647 {
1648 }
1649
1650 void UnionFolder::Save(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1651     return parent_.Save(path, code);
1652 }
1653
1654 bool UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &)> &code) {
1655     auto file(files_.find(path));
1656     if (file == files_.end())
1657         return parent_.Open(path, code);
1658
1659     auto &data(file->second);
1660     data.pubseekpos(0, std::ios::in);
1661     code(data);
1662     return true;
1663 }
1664
1665 void UnionFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1666     parent_.Find(path, fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &save) {
1667         if (files_.find(name) == files_.end())
1668             code(name, save);
1669     }));
1670
1671     for (auto &file : files_)
1672         code(file.first, fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1673             parent_.Save(file.first, fun([&](std::streambuf &save) {
1674                 file.second.pubseekpos(0, std::ios::in);
1675                 code(file.second, save);
1676             }));
1677         }));
1678 }
1679
1680 #ifndef LDID_NOTOOLS
1681 static size_t copy(std::streambuf &source, std::streambuf &target) {
1682     size_t total(0);
1683     for (;;) {
1684         char data[4096];
1685         size_t writ(source.sgetn(data, sizeof(data)));
1686         if (writ == 0)
1687             break;
1688         _assert(target.sputn(data, writ) == writ);
1689         total += writ;
1690     }
1691     return total;
1692 }
1693
1694 #ifndef LDID_NOPLIST
1695 static plist_t plist(const std::string &data) {
1696     plist_t plist(NULL);
1697     if (Starts(data, "bplist00"))
1698         plist_from_bin(data.data(), data.size(), &plist);
1699     else
1700         plist_from_xml(data.data(), data.size(), &plist);
1701     _assert(plist != NULL);
1702     return plist;
1703 }
1704
1705 static void plist_d(std::streambuf &buffer, const Functor<void (plist_t)> &code) {
1706     std::stringbuf data;
1707     copy(buffer, data);
1708     auto node(plist(data.str()));
1709     _scope({ plist_free(node); });
1710     _assert(plist_get_node_type(node) == PLIST_DICT);
1711     code(node);
1712 }
1713
1714 static std::string plist_s(plist_t node) {
1715     _assert(node != NULL);
1716     _assert(plist_get_node_type(node) == PLIST_STRING);
1717     char *data;
1718     plist_get_string_val(node, &data);
1719     _scope({ free(data); });
1720     return data;
1721 }
1722 #endif
1723
1724 enum Mode {
1725     NoMode,
1726     OptionalMode,
1727     OmitMode,
1728     NestedMode,
1729     TopMode,
1730 };
1731
1732 class Expression {
1733   private:
1734     regex_t regex_;
1735
1736   public:
1737     Expression(const std::string &code) {
1738         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED | REG_NOSUB) == 0, "regcomp()");
1739     }
1740
1741     ~Expression() {
1742         regfree(&regex_);
1743     }
1744
1745     bool operator ()(const std::string &data) const {
1746         auto value(regexec(&regex_, data.c_str(), 0, NULL, 0));
1747         if (value == REG_NOMATCH)
1748             return false;
1749         _assert_(value == 0, "regexec()");
1750         return true;
1751     }
1752 };
1753
1754 struct Rule {
1755     unsigned weight_;
1756     Mode mode_;
1757     std::string code_;
1758
1759     mutable std::auto_ptr<Expression> regex_;
1760
1761     Rule(unsigned weight, Mode mode, const std::string &code) :
1762         weight_(weight),
1763         mode_(mode),
1764         code_(code)
1765     {
1766     }
1767
1768     Rule(const Rule &rhs) :
1769         weight_(rhs.weight_),
1770         mode_(rhs.mode_),
1771         code_(rhs.code_)
1772     {
1773     }
1774
1775     void Compile() const {
1776         regex_.reset(new Expression(code_));
1777     }
1778
1779     bool operator ()(const std::string &data) const {
1780         _assert(regex_.get() != NULL);
1781         return (*regex_)(data);
1782     }
1783
1784     bool operator <(const Rule &rhs) const {
1785         if (weight_ > rhs.weight_)
1786             return true;
1787         if (weight_ < rhs.weight_)
1788             return false;
1789         return mode_ > rhs.mode_;
1790     }
1791 };
1792
1793 struct RuleCode {
1794     bool operator ()(const Rule *lhs, const Rule *rhs) const {
1795         return lhs->code_ < rhs->code_;
1796     }
1797 };
1798
1799 #ifndef LDID_NOPLIST
1800 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) {
1801     std::string executable;
1802     std::string identifier;
1803
1804     static const std::string info("Info.plist");
1805
1806     _assert_(folder.Open(info, fun([&](std::streambuf &buffer) {
1807         plist_d(buffer, fun([&](plist_t node) {
1808             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
1809             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
1810         }));
1811     })), "open(): Info.plist");
1812
1813     std::map<std::string, std::multiset<Rule>> versions;
1814
1815     auto &rules1(versions[""]);
1816     auto &rules2(versions["2"]);
1817
1818     static const std::string signature("_CodeSignature/CodeResources");
1819
1820     folder.Open(signature, fun([&](std::streambuf &buffer) {
1821         plist_d(buffer, fun([&](plist_t node) {
1822             // XXX: maybe attempt to preserve existing rules
1823         }));
1824     }));
1825
1826     if (true) {
1827         rules1.insert(Rule{1, NoMode, "^"});
1828         rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1829         rules1.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
1830         rules1.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
1831         rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1832         rules1.insert(Rule{1, NoMode, "^version.plist$"});
1833     }
1834
1835     if (true) {
1836         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
1837         rules2.insert(Rule{20, NoMode, "^"});
1838         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
1839         rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1840         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
1841         rules2.insert(Rule{1, NoMode, "^.*"});
1842         rules2.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
1843         rules2.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
1844         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
1845         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
1846         rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
1847         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
1848         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
1849         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
1850     }
1851
1852     std::map<std::string, std::vector<char>> local;
1853
1854     static Expression nested("^PlugIns/[^/]*\\.appex/Info\\.plist$");
1855
1856     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
1857         if (!nested(name))
1858             return;
1859         auto bundle(root + Split(name).dir);
1860         SubFolder subfolder(folder, bundle);
1861         Bundle(bundle, subfolder, key, local, "");
1862     }));
1863
1864     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
1865         if (name == executable || name == signature)
1866             return;
1867
1868         auto &hash(local[name]);
1869         if (!hash.empty())
1870             return;
1871
1872         code(fun([&](std::streambuf &data, std::streambuf &save) {
1873             HashProxy proxy(hash, save);
1874             copy(data, proxy);
1875         }));
1876
1877         _assert(hash.size() == LDID_SHA1_DIGEST_LENGTH);
1878     }));
1879
1880     auto plist(plist_new_dict());
1881     _scope({ plist_free(plist); });
1882
1883     for (const auto &version : versions) {
1884         auto files(plist_new_dict());
1885         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
1886
1887         for (const auto &rule : version.second)
1888             rule.Compile();
1889
1890         for (const auto &hash : local)
1891             for (const auto &rule : version.second)
1892                 if (rule(hash.first)) {
1893                     if (rule.mode_ == NoMode)
1894                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(hash.second.data(), hash.second.size()));
1895                     else if (rule.mode_ == OptionalMode) {
1896                         auto entry(plist_new_dict());
1897                         plist_dict_set_item(entry, "hash", plist_new_data(hash.second.data(), hash.second.size()));
1898                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
1899                         plist_dict_set_item(files, hash.first.c_str(), entry);
1900                     }
1901
1902                     break;
1903                 }
1904     }
1905
1906     for (const auto &version : versions) {
1907         auto rules(plist_new_dict());
1908         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
1909
1910         std::multiset<const Rule *, RuleCode> ordered;
1911         for (const auto &rule : version.second)
1912             ordered.insert(&rule);
1913
1914         for (const auto &rule : ordered)
1915             if (rule->weight_ == 1 && rule->mode_ == NoMode)
1916                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
1917             else {
1918                 auto entry(plist_new_dict());
1919                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
1920
1921                 switch (rule->mode_) {
1922                     case NoMode:
1923                         break;
1924                     case OmitMode:
1925                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
1926                         break;
1927                     case OptionalMode:
1928                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
1929                         break;
1930                     case NestedMode:
1931                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
1932                         break;
1933                     case TopMode:
1934                         plist_dict_set_item(entry, "top", plist_new_bool(true));
1935                         break;
1936                 }
1937
1938                 if (rule->weight_ >= 10000)
1939                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
1940                 else if (rule->weight_ != 1)
1941                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
1942             }
1943     }
1944
1945     folder.Save(signature, fun([&](std::streambuf &save) {
1946         HashProxy proxy(local[signature], save);
1947         char *xml(NULL);
1948         uint32_t size;
1949         plist_to_xml(plist, &xml, &size);
1950         _scope({ free(xml); });
1951         put(proxy, xml, size);
1952     }));
1953
1954     folder.Open(executable, fun([&](std::streambuf &buffer) {
1955         // XXX: this is a miserable fail
1956         std::stringbuf temp;
1957         copy(buffer, temp);
1958         auto data(temp.str());
1959
1960         folder.Save(executable, fun([&](std::streambuf &save) {
1961             Slots slots;
1962             slots[1] = local.at(info);
1963             slots[3] = local.at(signature);
1964
1965             HashProxy proxy(local[executable], save);
1966             Sign(data.data(), data.size(), proxy, identifier, entitlements, key, slots);
1967         }));
1968     }));
1969
1970     for (const auto &hash : local)
1971         remote[root + hash.first] = hash.second;
1972
1973     return executable;
1974 }
1975 #endif
1976
1977 #endif
1978 }
1979
1980 #ifndef LDID_NOTOOLS
1981 int main(int argc, char *argv[]) {
1982 #ifndef LDID_NOSMIME
1983     OpenSSL_add_all_algorithms();
1984 #endif
1985
1986     union {
1987         uint16_t word;
1988         uint8_t byte[2];
1989     } endian = {1};
1990
1991     little_ = endian.byte[0];
1992
1993     bool flag_r(false);
1994     bool flag_e(false);
1995
1996 #ifndef LDID_NOFLAGT
1997     bool flag_T(false);
1998 #endif
1999
2000     bool flag_S(false);
2001     bool flag_s(false);
2002
2003     bool flag_D(false);
2004
2005     bool flag_A(false);
2006     bool flag_a(false);
2007
2008     bool flag_u(false);
2009
2010     uint32_t flag_CPUType(_not(uint32_t));
2011     uint32_t flag_CPUSubtype(_not(uint32_t));
2012
2013     const char *flag_I(NULL);
2014
2015 #ifndef LDID_NOFLAGT
2016     bool timeh(false);
2017     uint32_t timev(0);
2018 #endif
2019
2020     Map entitlements;
2021     Map key;
2022     ldid::Slots slots;
2023
2024     std::vector<std::string> files;
2025
2026     if (argc == 1) {
2027         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2028         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2029         fprintf(stderr, "   %s -S cat\n", argv[0]);
2030         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2031         exit(0);
2032     }
2033
2034     for (int argi(1); argi != argc; ++argi)
2035         if (argv[argi][0] != '-')
2036             files.push_back(argv[argi]);
2037         else switch (argv[argi][1]) {
2038             case 'r':
2039                 _assert(!flag_s);
2040                 _assert(!flag_S);
2041                 flag_r = true;
2042             break;
2043
2044             case 'e': flag_e = true; break;
2045
2046             case 'E': {
2047                 const char *slot = argv[argi] + 2;
2048                 const char *colon = strchr(slot, ':');
2049                 _assert(colon != NULL);
2050                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2051                 char *arge;
2052                 unsigned number(strtoul(slot, &arge, 0));
2053                 _assert(arge == colon);
2054                 std::vector<char> &hash(slots[number]);
2055                 hash.resize(LDID_SHA1_DIGEST_LENGTH);
2056                 sha1(reinterpret_cast<uint8_t *>(hash.data()), file.data(), file.size());
2057             } break;
2058
2059             case 'D': flag_D = true; break;
2060
2061             case 'a': flag_a = true; break;
2062
2063             case 'A':
2064                 _assert(!flag_A);
2065                 flag_A = true;
2066                 if (argv[argi][2] != '\0') {
2067                     const char *cpu = argv[argi] + 2;
2068                     const char *colon = strchr(cpu, ':');
2069                     _assert(colon != NULL);
2070                     char *arge;
2071                     flag_CPUType = strtoul(cpu, &arge, 0);
2072                     _assert(arge == colon);
2073                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2074                     _assert(arge == argv[argi] + strlen(argv[argi]));
2075                 }
2076             break;
2077
2078             case 's':
2079                 _assert(!flag_r);
2080                 _assert(!flag_S);
2081                 flag_s = true;
2082             break;
2083
2084             case 'S':
2085                 _assert(!flag_r);
2086                 _assert(!flag_s);
2087                 flag_S = true;
2088                 if (argv[argi][2] != '\0') {
2089                     const char *xml = argv[argi] + 2;
2090                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2091                 }
2092             break;
2093
2094             case 'K':
2095                 if (argv[argi][2] != '\0')
2096                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2097             break;
2098
2099 #ifndef LDID_NOFLAGT
2100             case 'T': {
2101                 flag_T = true;
2102                 if (argv[argi][2] == '-')
2103                     timeh = true;
2104                 else {
2105                     char *arge;
2106                     timev = strtoul(argv[argi] + 2, &arge, 0);
2107                     _assert(arge == argv[argi] + strlen(argv[argi]));
2108                 }
2109             } break;
2110 #endif
2111
2112             case 'u': {
2113                 flag_u = true;
2114             } break;
2115
2116             case 'I': {
2117                 flag_I = argv[argi] + 2;
2118             } break;
2119
2120             default:
2121                 goto usage;
2122             break;
2123         }
2124
2125     _assert(flag_S || key.empty());
2126     _assert(flag_S || flag_I == NULL);
2127
2128     if (files.empty()) usage: {
2129         exit(0);
2130     }
2131
2132     size_t filei(0), filee(0);
2133     _foreach (file, files) try {
2134         std::string path(file);
2135
2136         struct stat info;
2137         _syscall(stat(path.c_str(), &info));
2138
2139         if (S_ISDIR(info.st_mode)) {
2140 #ifndef LDID_NOPLIST
2141             _assert(!flag_r);
2142             ldid::DiskFolder folder(path);
2143             std::map<std::string, std::vector<char>> hashes;
2144             path += "/" + Bundle("", folder, key, hashes, entitlements);
2145 #else
2146             _assert(false);
2147 #endif
2148         } else if (flag_S || flag_r) {
2149             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2150
2151             std::filebuf output;
2152             Split split(path);
2153             auto temp(Temporary(output, split));
2154
2155             if (flag_r)
2156                 ldid::Unsign(input.data(), input.size(), output);
2157             else {
2158                 std::string identifier(flag_I ?: split.base.c_str());
2159                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, key, slots);
2160             }
2161
2162             Commit(path, temp);
2163         }
2164
2165         bool modify(false);
2166 #ifndef LDID_NOFLAGT
2167         if (flag_T)
2168             modify = true;
2169 #endif
2170         if (flag_s)
2171             modify = true;
2172
2173         Map mapping(path, modify);
2174         FatHeader fat_header(mapping.data(), mapping.size());
2175
2176         _foreach (mach_header, fat_header.GetMachHeaders()) {
2177             struct linkedit_data_command *signature(NULL);
2178             struct encryption_info_command *encryption(NULL);
2179
2180             if (flag_A) {
2181                 if (mach_header.GetCPUType() != flag_CPUType)
2182                     continue;
2183                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2184                     continue;
2185             }
2186
2187             if (flag_a)
2188                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2189
2190             _foreach (load_command, mach_header.GetLoadCommands()) {
2191                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2192
2193                 if (false);
2194                 else if (cmd == LC_CODE_SIGNATURE)
2195                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2196                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2197                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2198                 else if (cmd == LC_LOAD_DYLIB) {
2199                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2200                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2201
2202                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2203                         if (flag_u) {
2204                             Version version;
2205                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2206                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2207                         }
2208                     }
2209                 }
2210 #ifndef LDID_NOFLAGT
2211                 else if (cmd == LC_ID_DYLIB) {
2212                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2213
2214                     if (flag_T) {
2215                         uint32_t timed;
2216
2217                         if (!timeh)
2218                             timed = timev;
2219                         else {
2220                             dylib_command->dylib.timestamp = 0;
2221                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2222                         }
2223
2224                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2225                     }
2226                 }
2227 #endif
2228             }
2229
2230             if (flag_D) {
2231                 _assert(encryption != NULL);
2232                 encryption->cryptid = mach_header.Swap(0);
2233             }
2234
2235             if (flag_e) {
2236                 _assert(signature != NULL);
2237
2238                 uint32_t data = mach_header.Swap(signature->dataoff);
2239
2240                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2241                 uint8_t *blob = top + data;
2242                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2243
2244                 for (size_t index(0); index != Swap(super->count); ++index)
2245                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2246                         uint32_t begin = Swap(super->index[index].offset);
2247                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2248                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2249                     }
2250             }
2251
2252             if (flag_s) {
2253                 _assert(signature != NULL);
2254
2255                 uint32_t data = mach_header.Swap(signature->dataoff);
2256
2257                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2258                 uint8_t *blob = top + data;
2259                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2260
2261                 for (size_t index(0); index != Swap(super->count); ++index)
2262                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2263                         uint32_t begin = Swap(super->index[index].offset);
2264                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
2265
2266                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2267                         uint32_t pages = Swap(directory->nCodeSlots);
2268
2269                         if (pages != 1)
2270                             for (size_t i = 0; i != pages - 1; ++i)
2271                                 sha1(hashes[i], top + PageSize_ * i, PageSize_);
2272                         if (pages != 0)
2273                             sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1);
2274                     }
2275             }
2276         }
2277
2278         ++filei;
2279     } catch (const char *) {
2280         ++filee;
2281         ++filei;
2282     }
2283
2284     return filee;
2285 }
2286 #endif