ldid.cpp

   1 /* ldid - (Mach-O) Link-Loader Identity Editor
   2  * Copyright (C) 2007-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include <cstdio>
  23 #include <cstdlib>
  24 #include <cstring>
  25 #include <fstream>
  26 #include <iostream>
  27 #include <memory>
  28 #include <set>
  29 #include <sstream>
  30 #include <string>
  31 #include <vector>
  32
  33 #include <dirent.h>
  34 #include <errno.h>
  35 #include <fcntl.h>
  36 #include <regex.h>
  37 #include <stdbool.h>
  38 #include <stdint.h>
  39 #include <unistd.h>
  40
  41 #include <sys/mman.h>
  42 #include <sys/stat.h>
  43 #include <sys/types.h>
  44
  45 #ifndef LDID_NOSMIME
  46 #include <openssl/err.h>
  47 #include <openssl/pem.h>
  48 #include <openssl/pkcs7.h>
  49 #include <openssl/pkcs12.h>
  50 #endif
  51
  52 #ifdef __APPLE__
  53 #include <CommonCrypto/CommonDigest.h>
  54
  55 #define LDID_SHA1_DIGEST_LENGTH CC_SHA1_DIGEST_LENGTH
  56 #define LDID_SHA1 CC_SHA1
  57 #define LDID_SHA1_CTX CC_SHA1_CTX
  58 #define LDID_SHA1_Init CC_SHA1_Init
  59 #define LDID_SHA1_Update CC_SHA1_Update
  60 #define LDID_SHA1_Final CC_SHA1_Final
  61
  62 #define LDID_SHA256_DIGEST_LENGTH CC_SHA256_DIGEST_LENGTH
  63 #define LDID_SHA256 CC_SHA256
  64 #define LDID_SHA256_CTX CC_SHA256_CTX
  65 #define LDID_SHA256_Init CC_SHA256_Init
  66 #define LDID_SHA256_Update CC_SHA256_Update
  67 #define LDID_SHA256_Final CC_SHA256_Final
  68 #else
  69 #include <openssl/sha.h>
  70
  71 #define LDID_SHA1_DIGEST_LENGTH SHA_DIGEST_LENGTH
  72 #define LDID_SHA1 SHA1
  73 #define LDID_SHA1_CTX SHA_CTX
  74 #define LDID_SHA1_Init SHA1_Init
  75 #define LDID_SHA1_Update SHA1_Update
  76 #define LDID_SHA1_Final SHA1_Final
  77
  78 #define LDID_SHA256_DIGEST_LENGTH SHA256_DIGEST_LENGTH
  79 #define LDID_SHA256 SHA256
  80 #define LDID_SHA256_CTX SHA256_CTX
  81 #define LDID_SHA256_Init SHA256_Init
  82 #define LDID_SHA256_Update SHA256_Update
  83 #define LDID_SHA256_Final SHA256_Final
  84 #endif
  85
  86 #ifndef LDID_NOPLIST
  87 #include <plist/plist.h>
  88 #endif
  89
  90 #include "ldid.hpp"
  91
  92 #define _assert___(line) \
  93     #line
  94 #define _assert__(line) \
  95     _assert___(line)
  96
  97 #ifdef __EXCEPTIONS
  98 #define _assert_(expr, format, ...) \
  99     do if (!(expr)) { \
 100         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
 101         throw __FILE__ "(" _assert__(__LINE__) "): _assert(" #expr ")"; \
 102     } while (false)
 103 #else
 104 // XXX: this is not acceptable
 105 #define _assert_(expr, format, ...) \
 106     do if (!(expr)) { \
 107         fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \
 108         exit(-1); \
 109     } while (false)
 110 #endif
 111
 112 #define _assert(expr) \
 113     _assert_(expr, "%s", #expr)
 114
 115 #define _syscall(expr, ...) [&] { for (;;) { \
 116     auto _value(expr); \
 117     if ((long) _value != -1) \
 118         return _value; \
 119     int error(errno); \
 120     if (error == EINTR) \
 121         continue; \
 122     /* XXX: EINTR is included in this list to fix g++ */ \
 123     for (auto success : (long[]) {EINTR, __VA_ARGS__}) \
 124         if (error == success) \
 125             return (decltype(expr)) -success; \
 126     _assert_(false, "errno=%u", error); \
 127 } }()
 128
 129 #define _trace() \
 130     fprintf(stderr, "_trace(%s:%u): %s\n", __FILE__, __LINE__, __FUNCTION__)
 131
 132 #define _not(type) \
 133     ((type) ~ (type) 0)
 134
 135 #define _packed \
 136     __attribute__((packed))
 137
 138 template <typename Type_>
 139 struct Iterator_ {
 140     typedef typename Type_::const_iterator Result;
 141 };
 142
 143 #define _foreach(item, list) \
 144     for (bool _stop(true); _stop; ) \
 145         for (const __typeof__(list) &_list = (list); _stop; _stop = false) \
 146             for (Iterator_<__typeof__(list)>::Result _item = _list.begin(); _item != _list.end(); ++_item) \
 147                 for (bool _suck(true); _suck; _suck = false) \
 148                     for (const __typeof__(*_item) &item = *_item; _suck; _suck = false)
 149
 150 class _Scope {
 151 };
 152
 153 template <typename Function_>
 154 class Scope :
 155     public _Scope
 156 {
 157   private:
 158     Function_ function_;
 159
 160   public:
 161     Scope(const Function_ &function) :
 162         function_(function)
 163     {
 164     }
 165
 166     ~Scope() {
 167         function_();
 168     }
 169 };
 170
 171 template <typename Function_>
 172 Scope<Function_> _scope(const Function_ &function) {
 173     return Scope<Function_>(function);
 174 }
 175
 176 #define _scope__(counter, function) \
 177     __attribute__((__unused__)) \
 178     const _Scope &_scope ## counter(_scope([&]function))
 179 #define _scope_(counter, function) \
 180     _scope__(counter, function)
 181 #define _scope(function) \
 182     _scope_(__COUNTER__, function)
 183
 184 #define CPU_ARCH_MASK  uint32_t(0xff000000)
 185 #define CPU_ARCH_ABI64 uint32_t(0x01000000)
 186
 187 #define CPU_TYPE_ANY     uint32_t(-1)
 188 #define CPU_TYPE_VAX     uint32_t( 1)
 189 #define CPU_TYPE_MC680x0 uint32_t( 6)
 190 #define CPU_TYPE_X86     uint32_t( 7)
 191 #define CPU_TYPE_MC98000 uint32_t(10)
 192 #define CPU_TYPE_HPPA    uint32_t(11)
 193 #define CPU_TYPE_ARM     uint32_t(12)
 194 #define CPU_TYPE_MC88000 uint32_t(13)
 195 #define CPU_TYPE_SPARC   uint32_t(14)
 196 #define CPU_TYPE_I860    uint32_t(15)
 197 #define CPU_TYPE_POWERPC uint32_t(18)
 198
 199 #define CPU_TYPE_I386 CPU_TYPE_X86
 200
 201 #define CPU_TYPE_ARM64     (CPU_ARCH_ABI64 | CPU_TYPE_ARM)
 202 #define CPU_TYPE_POWERPC64 (CPU_ARCH_ABI64 | CPU_TYPE_POWERPC)
 203 #define CPU_TYPE_X86_64    (CPU_ARCH_ABI64 | CPU_TYPE_X86)
 204
 205 struct fat_header {
 206     uint32_t magic;
 207     uint32_t nfat_arch;
 208 } _packed;
 209
 210 #define FAT_MAGIC 0xcafebabe
 211 #define FAT_CIGAM 0xbebafeca
 212
 213 struct fat_arch {
 214     uint32_t cputype;
 215     uint32_t cpusubtype;
 216     uint32_t offset;
 217     uint32_t size;
 218     uint32_t align;
 219 } _packed;
 220
 221 struct mach_header {
 222     uint32_t magic;
 223     uint32_t cputype;
 224     uint32_t cpusubtype;
 225     uint32_t filetype;
 226     uint32_t ncmds;
 227     uint32_t sizeofcmds;
 228     uint32_t flags;
 229 } _packed;
 230
 231 #define MH_MAGIC 0xfeedface
 232 #define MH_CIGAM 0xcefaedfe
 233
 234 #define MH_MAGIC_64 0xfeedfacf
 235 #define MH_CIGAM_64 0xcffaedfe
 236
 237 #define MH_DYLDLINK   0x4
 238
 239 #define MH_OBJECT     0x1
 240 #define MH_EXECUTE    0x2
 241 #define MH_DYLIB      0x6
 242 #define MH_BUNDLE     0x8
 243 #define MH_DYLIB_STUB 0x9
 244
 245 struct load_command {
 246     uint32_t cmd;
 247     uint32_t cmdsize;
 248 } _packed;
 249
 250 #define LC_REQ_DYLD           uint32_t(0x80000000)
 251
 252 #define LC_SEGMENT            uint32_t(0x01)
 253 #define LC_SYMTAB             uint32_t(0x02)
 254 #define LC_DYSYMTAB           uint32_t(0x0b)
 255 #define LC_LOAD_DYLIB         uint32_t(0x0c)
 256 #define LC_ID_DYLIB           uint32_t(0x0d)
 257 #define LC_SEGMENT_64         uint32_t(0x19)
 258 #define LC_UUID               uint32_t(0x1b)
 259 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
 260 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
 261 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
 262 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
 263 #define LC_DYLD_INFO          uint32_t(0x22)
 264 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
 265 #define LC_ENCRYPTION_INFO_64 uint32_t(0x2c)
 266
 267 union Version {
 268     struct {
 269         uint8_t patch;
 270         uint8_t minor;
 271         uint16_t major;
 272     } _packed;
 273
 274     uint32_t value;
 275 };
 276
 277 struct dylib {
 278     uint32_t name;
 279     uint32_t timestamp;
 280     uint32_t current_version;
 281     uint32_t compatibility_version;
 282 } _packed;
 283
 284 struct dylib_command {
 285     uint32_t cmd;
 286     uint32_t cmdsize;
 287     struct dylib dylib;
 288 } _packed;
 289
 290 struct uuid_command {
 291     uint32_t cmd;
 292     uint32_t cmdsize;
 293     uint8_t uuid[16];
 294 } _packed;
 295
 296 struct symtab_command {
 297     uint32_t cmd;
 298     uint32_t cmdsize;
 299     uint32_t symoff;
 300     uint32_t nsyms;
 301     uint32_t stroff;
 302     uint32_t strsize;
 303 } _packed;
 304
 305 struct dyld_info_command {
 306     uint32_t cmd;
 307     uint32_t cmdsize;
 308     uint32_t rebase_off;
 309     uint32_t rebase_size;
 310     uint32_t bind_off;
 311     uint32_t bind_size;
 312     uint32_t weak_bind_off;
 313     uint32_t weak_bind_size;
 314     uint32_t lazy_bind_off;
 315     uint32_t lazy_bind_size;
 316     uint32_t export_off;
 317     uint32_t export_size;
 318 } _packed;
 319
 320 struct dysymtab_command {
 321     uint32_t cmd;
 322     uint32_t cmdsize;
 323     uint32_t ilocalsym;
 324     uint32_t nlocalsym;
 325     uint32_t iextdefsym;
 326     uint32_t nextdefsym;
 327     uint32_t iundefsym;
 328     uint32_t nundefsym;
 329     uint32_t tocoff;
 330     uint32_t ntoc;
 331     uint32_t modtaboff;
 332     uint32_t nmodtab;
 333     uint32_t extrefsymoff;
 334     uint32_t nextrefsyms;
 335     uint32_t indirectsymoff;
 336     uint32_t nindirectsyms;
 337     uint32_t extreloff;
 338     uint32_t nextrel;
 339     uint32_t locreloff;
 340     uint32_t nlocrel;
 341 } _packed;
 342
 343 struct dylib_table_of_contents {
 344     uint32_t symbol_index;
 345     uint32_t module_index;
 346 } _packed;
 347
 348 struct dylib_module {
 349     uint32_t module_name;
 350     uint32_t iextdefsym;
 351     uint32_t nextdefsym;
 352     uint32_t irefsym;
 353     uint32_t nrefsym;
 354     uint32_t ilocalsym;
 355     uint32_t nlocalsym;
 356     uint32_t iextrel;
 357     uint32_t nextrel;
 358     uint32_t iinit_iterm;
 359     uint32_t ninit_nterm;
 360     uint32_t objc_module_info_addr;
 361     uint32_t objc_module_info_size;
 362 } _packed;
 363
 364 struct dylib_reference {
 365     uint32_t isym:24;
 366     uint32_t flags:8;
 367 } _packed;
 368
 369 struct relocation_info {
 370     int32_t r_address;
 371     uint32_t r_symbolnum:24;
 372     uint32_t r_pcrel:1;
 373     uint32_t r_length:2;
 374     uint32_t r_extern:1;
 375     uint32_t r_type:4;
 376 } _packed;
 377
 378 struct nlist {
 379     union {
 380         char *n_name;
 381         int32_t n_strx;
 382     } n_un;
 383
 384     uint8_t n_type;
 385     uint8_t n_sect;
 386     uint8_t n_desc;
 387     uint32_t n_value;
 388 } _packed;
 389
 390 struct segment_command {
 391     uint32_t cmd;
 392     uint32_t cmdsize;
 393     char segname[16];
 394     uint32_t vmaddr;
 395     uint32_t vmsize;
 396     uint32_t fileoff;
 397     uint32_t filesize;
 398     uint32_t maxprot;
 399     uint32_t initprot;
 400     uint32_t nsects;
 401     uint32_t flags;
 402 } _packed;
 403
 404 struct segment_command_64 {
 405     uint32_t cmd;
 406     uint32_t cmdsize;
 407     char segname[16];
 408     uint64_t vmaddr;
 409     uint64_t vmsize;
 410     uint64_t fileoff;
 411     uint64_t filesize;
 412     uint32_t maxprot;
 413     uint32_t initprot;
 414     uint32_t nsects;
 415     uint32_t flags;
 416 } _packed;
 417
 418 struct section {
 419     char sectname[16];
 420     char segname[16];
 421     uint32_t addr;
 422     uint32_t size;
 423     uint32_t offset;
 424     uint32_t align;
 425     uint32_t reloff;
 426     uint32_t nreloc;
 427     uint32_t flags;
 428     uint32_t reserved1;
 429     uint32_t reserved2;
 430 } _packed;
 431
 432 struct section_64 {
 433     char sectname[16];
 434     char segname[16];
 435     uint64_t addr;
 436     uint64_t size;
 437     uint32_t offset;
 438     uint32_t align;
 439     uint32_t reloff;
 440     uint32_t nreloc;
 441     uint32_t flags;
 442     uint32_t reserved1;
 443     uint32_t reserved2;
 444     uint32_t reserved3;
 445 } _packed;
 446
 447 struct linkedit_data_command {
 448     uint32_t cmd;
 449     uint32_t cmdsize;
 450     uint32_t dataoff;
 451     uint32_t datasize;
 452 } _packed;
 453
 454 struct encryption_info_command {
 455     uint32_t cmd;
 456     uint32_t cmdsize;
 457     uint32_t cryptoff;
 458     uint32_t cryptsize;
 459     uint32_t cryptid;
 460 } _packed;
 461
 462 #define BIND_OPCODE_MASK                             0xf0
 463 #define BIND_IMMEDIATE_MASK                          0x0f
 464 #define BIND_OPCODE_DONE                             0x00
 465 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 466 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 467 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 468 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 469 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 470 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 471 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 472 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 473 #define BIND_OPCODE_DO_BIND                          0x90
 474 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 475 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 476 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 477
 478 static std::streamsize read(std::streambuf &stream, void *data, size_t size) {
 479     auto writ(stream.sgetn(static_cast<char *>(data), size));
 480     _assert(writ >= 0);
 481     return writ;
 482 }
 483
 484 static inline void get(std::streambuf &stream, void *data, size_t size) {
 485     _assert(read(stream, data, size) == size);
 486 }
 487
 488 static inline void put(std::streambuf &stream, const void *data, size_t size) {
 489     _assert(stream.sputn(static_cast<const char *>(data), size) == size);
 490 }
 491
 492 static size_t most(std::streambuf &stream, void *data, size_t size) {
 493     size_t total(size);
 494     while (size > 0)
 495         if (auto writ = read(stream, data, size))
 496             size -= writ;
 497         else break;
 498     return total - size;
 499 }
 500
 501 static inline void pad(std::streambuf &stream, size_t size) {
 502     char padding[size];
 503     memset(padding, 0, size);
 504     put(stream, padding, size);
 505 }
 506
 507 template <typename Type_>
 508 Type_ Align(Type_ value, size_t align) {
 509     value += align - 1;
 510     value /= align;
 511     value *= align;
 512     return value;
 513 }
 514
 515 static const uint8_t PageShift_(0x0c);
 516 static const uint32_t PageSize_(1 << PageShift_);
 517
 518 static inline uint16_t Swap_(uint16_t value) {
 519     return
 520         ((value >>  8) & 0x00ff) |
 521         ((value <<  8) & 0xff00);
 522 }
 523
 524 static inline uint32_t Swap_(uint32_t value) {
 525     value = ((value >>  8) & 0x00ff00ff) |
 526             ((value <<  8) & 0xff00ff00);
 527     value = ((value >> 16) & 0x0000ffff) |
 528             ((value << 16) & 0xffff0000);
 529     return value;
 530 }
 531
 532 static inline uint64_t Swap_(uint64_t value) {
 533     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 534     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 535     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 536     return value;
 537 }
 538
 539 static inline int16_t Swap_(int16_t value) {
 540     return Swap_(static_cast<uint16_t>(value));
 541 }
 542
 543 static inline int32_t Swap_(int32_t value) {
 544     return Swap_(static_cast<uint32_t>(value));
 545 }
 546
 547 static inline int64_t Swap_(int64_t value) {
 548     return Swap_(static_cast<uint64_t>(value));
 549 }
 550
 551 static bool little_(true);
 552
 553 static inline uint16_t Swap(uint16_t value) {
 554     return little_ ? Swap_(value) : value;
 555 }
 556
 557 static inline uint32_t Swap(uint32_t value) {
 558     return little_ ? Swap_(value) : value;
 559 }
 560
 561 static inline uint64_t Swap(uint64_t value) {
 562     return little_ ? Swap_(value) : value;
 563 }
 564
 565 static inline int16_t Swap(int16_t value) {
 566     return Swap(static_cast<uint16_t>(value));
 567 }
 568
 569 static inline int32_t Swap(int32_t value) {
 570     return Swap(static_cast<uint32_t>(value));
 571 }
 572
 573 static inline int64_t Swap(int64_t value) {
 574     return Swap(static_cast<uint64_t>(value));
 575 }
 576
 577 class Swapped {
 578   protected:
 579     bool swapped_;
 580
 581     Swapped() :
 582         swapped_(false)
 583     {
 584     }
 585
 586   public:
 587     Swapped(bool swapped) :
 588         swapped_(swapped)
 589     {
 590     }
 591
 592     template <typename Type_>
 593     Type_ Swap(Type_ value) const {
 594         return swapped_ ? Swap_(value) : value;
 595     }
 596 };
 597
 598 class Data :
 599     public Swapped
 600 {
 601   private:
 602     void *base_;
 603     size_t size_;
 604
 605   public:
 606     Data(void *base, size_t size) :
 607         base_(base),
 608         size_(size)
 609     {
 610     }
 611
 612     void *GetBase() const {
 613         return base_;
 614     }
 615
 616     size_t GetSize() const {
 617         return size_;
 618     }
 619 };
 620
 621 class MachHeader :
 622     public Data
 623 {
 624   private:
 625     bool bits64_;
 626
 627     struct mach_header *mach_header_;
 628     struct load_command *load_command_;
 629
 630   public:
 631     MachHeader(void *base, size_t size) :
 632         Data(base, size)
 633     {
 634         mach_header_ = (mach_header *) base;
 635
 636         switch (Swap(mach_header_->magic)) {
 637             case MH_CIGAM:
 638                 swapped_ = !swapped_;
 639             case MH_MAGIC:
 640                 bits64_ = false;
 641             break;
 642
 643             case MH_CIGAM_64:
 644                 swapped_ = !swapped_;
 645             case MH_MAGIC_64:
 646                 bits64_ = true;
 647             break;
 648
 649             default:
 650                 _assert(false);
 651         }
 652
 653         void *post = mach_header_ + 1;
 654         if (bits64_)
 655             post = (uint32_t *) post + 1;
 656         load_command_ = (struct load_command *) post;
 657
 658         _assert(
 659             Swap(mach_header_->filetype) == MH_EXECUTE ||
 660             Swap(mach_header_->filetype) == MH_DYLIB ||
 661             Swap(mach_header_->filetype) == MH_BUNDLE
 662         );
 663     }
 664
 665     bool Bits64() const {
 666         return bits64_;
 667     }
 668
 669     struct mach_header *operator ->() const {
 670         return mach_header_;
 671     }
 672
 673     operator struct mach_header *() const {
 674         return mach_header_;
 675     }
 676
 677     uint32_t GetCPUType() const {
 678         return Swap(mach_header_->cputype);
 679     }
 680
 681     uint32_t GetCPUSubtype() const {
 682         return Swap(mach_header_->cpusubtype) & 0xff;
 683     }
 684
 685     struct load_command *GetLoadCommand() const {
 686         return load_command_;
 687     }
 688
 689     std::vector<struct load_command *> GetLoadCommands() const {
 690         std::vector<struct load_command *> load_commands;
 691
 692         struct load_command *load_command = load_command_;
 693         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 694             load_commands.push_back(load_command);
 695             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 696         }
 697
 698         return load_commands;
 699     }
 700
 701     void ForSection(const ldid::Functor<void (const char *, const char *, void *, size_t)> &code) const {
 702         _foreach (load_command, GetLoadCommands())
 703             switch (Swap(load_command->cmd)) {
 704                 case LC_SEGMENT: {
 705                     auto segment(reinterpret_cast<struct segment_command *>(load_command));
 706                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 707                     auto section(reinterpret_cast<struct section *>(segment + 1));
 708                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 709                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 710                 } break;
 711
 712                 case LC_SEGMENT_64: {
 713                     auto segment(reinterpret_cast<struct segment_command_64 *>(load_command));
 714                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 715                     auto section(reinterpret_cast<struct section_64 *>(segment + 1));
 716                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 717                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 718                 } break;
 719             }
 720     }
 721
 722     template <typename Target_>
 723     Target_ *GetOffset(uint32_t offset) const {
 724         return reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_);
 725     }
 726 };
 727
 728 class FatMachHeader :
 729     public MachHeader
 730 {
 731   private:
 732     fat_arch *fat_arch_;
 733
 734   public:
 735     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 736         MachHeader(base, size),
 737         fat_arch_(fat_arch)
 738     {
 739     }
 740
 741     fat_arch *GetFatArch() const {
 742         return fat_arch_;
 743     }
 744 };
 745
 746 class FatHeader :
 747     public Data
 748 {
 749   private:
 750     fat_header *fat_header_;
 751     std::vector<FatMachHeader> mach_headers_;
 752
 753   public:
 754     FatHeader(void *base, size_t size) :
 755         Data(base, size)
 756     {
 757         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 758
 759         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 760             swapped_ = !swapped_;
 761             goto fat;
 762         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 763             fat_header_ = NULL;
 764             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 765         } else fat: {
 766             size_t fat_narch = Swap(fat_header_->nfat_arch);
 767             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 768             size_t arch;
 769             for (arch = 0; arch != fat_narch; ++arch) {
 770                 uint32_t arch_offset = Swap(fat_arch->offset);
 771                 uint32_t arch_size = Swap(fat_arch->size);
 772                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 773                 ++fat_arch;
 774             }
 775         }
 776     }
 777
 778     std::vector<FatMachHeader> &GetMachHeaders() {
 779         return mach_headers_;
 780     }
 781
 782     bool IsFat() const {
 783         return fat_header_ != NULL;
 784     }
 785
 786     struct fat_header *operator ->() const {
 787         return fat_header_;
 788     }
 789
 790     operator struct fat_header *() const {
 791         return fat_header_;
 792     }
 793 };
 794
 795 #define CSMAGIC_REQUIREMENT            uint32_t(0xfade0c00)
 796 #define CSMAGIC_REQUIREMENTS           uint32_t(0xfade0c01)
 797 #define CSMAGIC_CODEDIRECTORY          uint32_t(0xfade0c02)
 798 #define CSMAGIC_EMBEDDED_SIGNATURE     uint32_t(0xfade0cc0)
 799 #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02)
 800 #define CSMAGIC_EMBEDDED_ENTITLEMENTS  uint32_t(0xfade7171)
 801 #define CSMAGIC_DETACHED_SIGNATURE     uint32_t(0xfade0cc1)
 802 #define CSMAGIC_BLOBWRAPPER            uint32_t(0xfade0b01)
 803
 804 #define CSSLOT_CODEDIRECTORY uint32_t(0x00000)
 805 #define CSSLOT_INFOSLOT      uint32_t(0x00001)
 806 #define CSSLOT_REQUIREMENTS  uint32_t(0x00002)
 807 #define CSSLOT_RESOURCEDIR   uint32_t(0x00003)
 808 #define CSSLOT_APPLICATION   uint32_t(0x00004)
 809 #define CSSLOT_ENTITLEMENTS  uint32_t(0x00005)
 810
 811 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 812
 813 #define CS_HASHTYPE_SHA1 1
 814
 815 struct BlobIndex {
 816     uint32_t type;
 817     uint32_t offset;
 818 } _packed;
 819
 820 struct Blob {
 821     uint32_t magic;
 822     uint32_t length;
 823 } _packed;
 824
 825 struct SuperBlob {
 826     struct Blob blob;
 827     uint32_t count;
 828     struct BlobIndex index[];
 829 } _packed;
 830
 831 struct CodeDirectory {
 832     uint32_t version;
 833     uint32_t flags;
 834     uint32_t hashOffset;
 835     uint32_t identOffset;
 836     uint32_t nSpecialSlots;
 837     uint32_t nCodeSlots;
 838     uint32_t codeLimit;
 839     uint8_t hashSize;
 840     uint8_t hashType;
 841     uint8_t spare1;
 842     uint8_t pageSize;
 843     uint32_t spare2;
 844     uint32_t scatterOffset;
 845     uint32_t teamIDOffset;
 846     uint32_t spare3;
 847     uint64_t codeLimit64;
 848 } _packed;
 849
 850 #ifndef LDID_NOFLAGT
 851 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 852 #endif
 853
 854 static void sha1(uint8_t *hash, const void *data, size_t size) {
 855     LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 856 }
 857
 858 static void sha1(std::vector<char> &hash, const void *data, size_t size) {
 859     hash.resize(LDID_SHA1_DIGEST_LENGTH);
 860     sha1(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 861 }
 862
 863 struct CodesignAllocation {
 864     FatMachHeader mach_header_;
 865     uint32_t offset_;
 866     uint32_t size_;
 867     uint32_t limit_;
 868     uint32_t alloc_;
 869     uint32_t align_;
 870
 871     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) :
 872         mach_header_(mach_header),
 873         offset_(offset),
 874         size_(size),
 875         limit_(limit),
 876         alloc_(alloc),
 877         align_(align)
 878     {
 879     }
 880 };
 881
 882 #ifndef LDID_NOTOOLS
 883 class File {
 884   private:
 885     int file_;
 886
 887   public:
 888     File() :
 889         file_(-1)
 890     {
 891     }
 892
 893     ~File() {
 894         if (file_ != -1)
 895             _syscall(close(file_));
 896     }
 897
 898     void open(const char *path, int flags) {
 899         _assert(file_ == -1);
 900         file_ = _syscall(::open(path, flags));
 901     }
 902
 903     int file() const {
 904         return file_;
 905     }
 906 };
 907
 908 class Map {
 909   private:
 910     File file_;
 911     void *data_;
 912     size_t size_;
 913
 914     void clear() {
 915         if (data_ == NULL)
 916             return;
 917         _syscall(munmap(data_, size_));
 918         data_ = NULL;
 919         size_ = 0;
 920     }
 921
 922   public:
 923     Map() :
 924         data_(NULL),
 925         size_(0)
 926     {
 927     }
 928
 929     Map(const std::string &path, int oflag, int pflag, int mflag) :
 930         Map()
 931     {
 932         open(path, oflag, pflag, mflag);
 933     }
 934
 935     Map(const std::string &path, bool edit) :
 936         Map()
 937     {
 938         open(path, edit);
 939     }
 940
 941     ~Map() {
 942         clear();
 943     }
 944
 945     bool empty() const {
 946         return data_ == NULL;
 947     }
 948
 949     void open(const std::string &path, int oflag, int pflag, int mflag) {
 950         clear();
 951
 952         file_.open(path.c_str(), oflag);
 953         int file(file_.file());
 954
 955         struct stat stat;
 956         _syscall(fstat(file, &stat));
 957         size_ = stat.st_size;
 958
 959         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
 960     }
 961
 962     void open(const std::string &path, bool edit) {
 963         if (edit)
 964             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
 965         else
 966             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
 967     }
 968
 969     void *data() const {
 970         return data_;
 971     }
 972
 973     size_t size() const {
 974         return size_;
 975     }
 976
 977     operator std::string() const {
 978         return std::string(static_cast<char *>(data_), size_);
 979     }
 980 };
 981 #endif
 982
 983 namespace ldid {
 984
 985 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) {
 986     FatHeader source(const_cast<void *>(idata), isize);
 987
 988     size_t offset(0);
 989     if (source.IsFat())
 990         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
 991
 992     std::vector<CodesignAllocation> allocations;
 993     _foreach (mach_header, source.GetMachHeaders()) {
 994         struct linkedit_data_command *signature(NULL);
 995         struct symtab_command *symtab(NULL);
 996
 997         _foreach (load_command, mach_header.GetLoadCommands()) {
 998             uint32_t cmd(mach_header.Swap(load_command->cmd));
 999             if (false);
1000             else if (cmd == LC_CODE_SIGNATURE)
1001                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1002             else if (cmd == LC_SYMTAB)
1003                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
1004         }
1005
1006         size_t size;
1007         if (signature == NULL)
1008             size = mach_header.GetSize();
1009         else {
1010             size = mach_header.Swap(signature->dataoff);
1011             _assert(size <= mach_header.GetSize());
1012         }
1013
1014         if (symtab != NULL) {
1015             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
1016             _assert(end <= size);
1017             _assert(end >= size - 0x10);
1018             size = end;
1019         }
1020
1021         size_t alloc(allocate(mach_header, size));
1022
1023         auto *fat_arch(mach_header.GetFatArch());
1024         uint32_t align;
1025
1026         if (fat_arch != NULL)
1027             align = source.Swap(fat_arch->align);
1028         else switch (mach_header.GetCPUType()) {
1029             case CPU_TYPE_POWERPC:
1030             case CPU_TYPE_POWERPC64:
1031             case CPU_TYPE_X86:
1032             case CPU_TYPE_X86_64:
1033                 align = 0xc;
1034                 break;
1035             case CPU_TYPE_ARM:
1036             case CPU_TYPE_ARM64:
1037                 align = 0xe;
1038                 break;
1039             default:
1040                 align = 0x0;
1041                 break;
1042         }
1043
1044         offset = Align(offset, 1 << align);
1045
1046         uint32_t limit(size);
1047         if (alloc != 0)
1048             limit = Align(limit, 0x10);
1049
1050         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align));
1051         offset += size + alloc;
1052         offset = Align(offset, 0x10);
1053     }
1054
1055     size_t position(0);
1056
1057     if (source.IsFat()) {
1058         fat_header fat_header;
1059         fat_header.magic = Swap(FAT_MAGIC);
1060         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1061         put(output, &fat_header, sizeof(fat_header));
1062         position += sizeof(fat_header);
1063
1064         _foreach (allocation, allocations) {
1065             auto &mach_header(allocation.mach_header_);
1066
1067             fat_arch fat_arch;
1068             fat_arch.cputype = Swap(mach_header->cputype);
1069             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1070             fat_arch.offset = Swap(allocation.offset_);
1071             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1072             fat_arch.align = Swap(allocation.align_);
1073             put(output, &fat_arch, sizeof(fat_arch));
1074             position += sizeof(fat_arch);
1075         }
1076     }
1077
1078     _foreach (allocation, allocations) {
1079         auto &mach_header(allocation.mach_header_);
1080
1081         pad(output, allocation.offset_ - position);
1082         position = allocation.offset_;
1083
1084         std::vector<std::string> commands;
1085
1086         _foreach (load_command, mach_header.GetLoadCommands()) {
1087             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1088
1089             switch (mach_header.Swap(load_command->cmd)) {
1090                 case LC_CODE_SIGNATURE:
1091                     continue;
1092                 break;
1093
1094                 case LC_SEGMENT: {
1095                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1096                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1097                         break;
1098                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1099                     segment_command->filesize = size;
1100                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1101                 } break;
1102
1103                 case LC_SEGMENT_64: {
1104                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1105                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1106                         break;
1107                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1108                     segment_command->filesize = size;
1109                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1110                 } break;
1111             }
1112
1113             commands.push_back(copy);
1114         }
1115
1116         if (allocation.alloc_ != 0) {
1117             linkedit_data_command signature;
1118             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1119             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1120             signature.dataoff = mach_header.Swap(allocation.limit_);
1121             signature.datasize = mach_header.Swap(allocation.alloc_);
1122             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1123         }
1124
1125         size_t begin(position);
1126
1127         uint32_t after(0);
1128         _foreach(command, commands)
1129             after += command.size();
1130
1131         std::stringbuf altern;
1132
1133         struct mach_header header(*mach_header);
1134         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1135         header.sizeofcmds = mach_header.Swap(after);
1136         put(output, &header, sizeof(header));
1137         put(altern, &header, sizeof(header));
1138         position += sizeof(header);
1139
1140         if (mach_header.Bits64()) {
1141             auto pad(mach_header.Swap(uint32_t(0)));
1142             put(output, &pad, sizeof(pad));
1143             put(altern, &pad, sizeof(pad));
1144             position += sizeof(pad);
1145         }
1146
1147         _foreach(command, commands) {
1148             put(output, command.data(), command.size());
1149             put(altern, command.data(), command.size());
1150             position += command.size();
1151         }
1152
1153         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1154         if (before > after) {
1155             pad(output, before - after);
1156             pad(altern, before - after);
1157             position += before - after;
1158         }
1159
1160         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1161
1162         std::string overlap(altern.str());
1163         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1164
1165         put(output, top + (position - begin), allocation.size_ - (position - begin));
1166         position = begin + allocation.size_;
1167
1168         pad(output, allocation.limit_ - allocation.size_);
1169         position += allocation.limit_ - allocation.size_;
1170
1171         size_t saved(save(mach_header, output, allocation.limit_, overlap, top));
1172         if (allocation.alloc_ > saved)
1173             pad(output, allocation.alloc_ - saved);
1174         position += allocation.alloc_;
1175     }
1176 }
1177
1178 }
1179
1180 typedef std::map<uint32_t, std::string> Blobs;
1181
1182 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1183     auto value(buffer.str());
1184     std::swap(blobs[slot], value);
1185 }
1186
1187 static void insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1188     auto value(buffer.str());
1189     Blob blob;
1190     blob.magic = Swap(magic);
1191     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1192     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1193     std::swap(blobs[slot], value);
1194 }
1195
1196 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1197     size_t total(0);
1198     _foreach (blob, blobs)
1199         total += blob.second.size();
1200
1201     struct SuperBlob super;
1202     super.blob.magic = Swap(magic);
1203     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1204     super.count = Swap(uint32_t(blobs.size()));
1205     put(output, &super, sizeof(super));
1206
1207     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1208
1209     _foreach (blob, blobs) {
1210         BlobIndex index;
1211         index.type = Swap(blob.first);
1212         index.offset = Swap(uint32_t(offset));
1213         put(output, &index, sizeof(index));
1214         offset += blob.second.size();
1215     }
1216
1217     _foreach (blob, blobs)
1218         put(output, blob.second.data(), blob.second.size());
1219
1220     return offset;
1221 }
1222
1223 #ifndef LDID_NOSMIME
1224 class Buffer {
1225   private:
1226     BIO *bio_;
1227
1228   public:
1229     Buffer(BIO *bio) :
1230         bio_(bio)
1231     {
1232         _assert(bio_ != NULL);
1233     }
1234
1235     Buffer() :
1236         bio_(BIO_new(BIO_s_mem()))
1237     {
1238     }
1239
1240     Buffer(const char *data, size_t size) :
1241         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1242     {
1243     }
1244
1245     Buffer(const std::string &data) :
1246         Buffer(data.data(), data.size())
1247     {
1248     }
1249
1250     Buffer(PKCS7 *pkcs) :
1251         Buffer()
1252     {
1253         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1254     }
1255
1256     ~Buffer() {
1257         BIO_free_all(bio_);
1258     }
1259
1260     operator BIO *() const {
1261         return bio_;
1262     }
1263
1264     explicit operator std::string() const {
1265         char *data;
1266         auto size(BIO_get_mem_data(bio_, &data));
1267         return std::string(data, size);
1268     }
1269 };
1270
1271 class Stuff {
1272   private:
1273     PKCS12 *value_;
1274     EVP_PKEY *key_;
1275     X509 *cert_;
1276     STACK_OF(X509) *ca_;
1277
1278   public:
1279     Stuff(BIO *bio) :
1280         value_(d2i_PKCS12_bio(bio, NULL)),
1281         ca_(NULL)
1282     {
1283         _assert(value_ != NULL);
1284         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1285         _assert(key_ != NULL);
1286         _assert(cert_ != NULL);
1287     }
1288
1289     Stuff(const std::string &data) :
1290         Stuff(Buffer(data))
1291     {
1292     }
1293
1294     ~Stuff() {
1295         sk_X509_pop_free(ca_, X509_free);
1296         X509_free(cert_);
1297         EVP_PKEY_free(key_);
1298         PKCS12_free(value_);
1299     }
1300
1301     operator PKCS12 *() const {
1302         return value_;
1303     }
1304
1305     operator EVP_PKEY *() const {
1306         return key_;
1307     }
1308
1309     operator X509 *() const {
1310         return cert_;
1311     }
1312
1313     operator STACK_OF(X509) *() const {
1314         return ca_;
1315     }
1316 };
1317
1318 class Signature {
1319   private:
1320     PKCS7 *value_;
1321
1322   public:
1323     Signature(const Stuff &stuff, const Buffer &data) :
1324         value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED))
1325     {
1326         _assert(value_ != NULL);
1327     }
1328
1329     ~Signature() {
1330         PKCS7_free(value_);
1331     }
1332
1333     operator PKCS7 *() const {
1334         return value_;
1335     }
1336 };
1337 #endif
1338
1339 class NullBuffer :
1340     public std::streambuf
1341 {
1342   public:
1343     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1344         return size;
1345     }
1346
1347     virtual int_type overflow(int_type next) {
1348         return next;
1349     }
1350 };
1351
1352 class Hash {
1353   public:
1354     bool ready_;
1355     char sha1_[LDID_SHA1_DIGEST_LENGTH];
1356     char sha256_[LDID_SHA256_DIGEST_LENGTH];
1357
1358     Hash() :
1359         ready_(false)
1360     {
1361     }
1362
1363     operator std::vector<char>() const {
1364         return {sha1_, sha1_ + sizeof(sha1_)};
1365     }
1366 };
1367
1368 class HashBuffer :
1369     public std::streambuf
1370 {
1371   private:
1372     Hash &hash_;
1373
1374     LDID_SHA1_CTX sha1_;
1375     LDID_SHA256_CTX sha256_;
1376
1377   public:
1378     HashBuffer(Hash &hash) :
1379         hash_(hash)
1380     {
1381         LDID_SHA1_Init(&sha1_);
1382         LDID_SHA256_Init(&sha256_);
1383     }
1384
1385     ~HashBuffer() {
1386         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.sha1_), &sha1_);
1387         LDID_SHA256_Final(reinterpret_cast<uint8_t *>(hash_.sha256_), &sha256_);
1388         hash_.ready_ = true;
1389     }
1390
1391     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1392         LDID_SHA1_Update(&sha1_, data, size);
1393         LDID_SHA256_Update(&sha256_, data, size);
1394         return size;
1395     }
1396
1397     virtual int_type overflow(int_type next) {
1398         if (next == traits_type::eof())
1399             return sync();
1400         char value(next);
1401         xsputn(&value, 1);
1402         return next;
1403     }
1404 };
1405
1406 class HashProxy :
1407     public HashBuffer
1408 {
1409   private:
1410     std::streambuf &buffer_;
1411
1412   public:
1413     HashProxy(Hash &hash, std::streambuf &buffer) :
1414         HashBuffer(hash),
1415         buffer_(buffer)
1416     {
1417     }
1418
1419     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1420         _assert(HashBuffer::xsputn(data, size) == size);
1421         return buffer_.sputn(data, size);
1422     }
1423 };
1424
1425 #ifndef LDID_NOTOOLS
1426 static bool Starts(const std::string &lhs, const std::string &rhs) {
1427     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1428 }
1429
1430 class Split {
1431   public:
1432     std::string dir;
1433     std::string base;
1434
1435     Split(const std::string &path) {
1436         size_t slash(path.rfind('/'));
1437         if (slash == std::string::npos)
1438             base = path;
1439         else {
1440             dir = path.substr(0, slash + 1);
1441             base = path.substr(slash + 1);
1442         }
1443     }
1444 };
1445
1446 static void mkdir_p(const std::string &path) {
1447     if (path.empty())
1448         return;
1449 #ifdef __WIN32__
1450     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1451         return;
1452 #else
1453     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1454         return;
1455 #endif
1456     auto slash(path.rfind('/', path.size() - 1));
1457     if (slash == std::string::npos)
1458         return;
1459     mkdir_p(path.substr(0, slash));
1460 }
1461
1462 static std::string Temporary(std::filebuf &file, const Split &split) {
1463     std::string temp(split.dir + ".ldid." + split.base);
1464     mkdir_p(split.dir);
1465     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1466     return temp;
1467 }
1468
1469 static void Commit(const std::string &path, const std::string &temp) {
1470     struct stat info;
1471     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1472 #ifndef __WIN32__
1473         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1474 #endif
1475         _syscall(chmod(temp.c_str(), info.st_mode));
1476     }
1477
1478     _syscall(rename(temp.c_str(), path.c_str()));
1479 }
1480 #endif
1481
1482 namespace ldid {
1483
1484 void Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &requirement, const std::string &key, const Slots &slots) {
1485     std::string team;
1486
1487 #ifndef LDID_NOSMIME
1488     if (!key.empty()) {
1489         Stuff stuff(key);
1490         auto name(X509_get_subject_name(stuff));
1491         _assert(name != NULL);
1492         auto index(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, -1));
1493         _assert(index >= 0);
1494         auto next(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, index));
1495         _assert(next == -1);
1496         auto entry(X509_NAME_get_entry(name, index));
1497         _assert(entry != NULL);
1498         auto asn(X509_NAME_ENTRY_get_data(entry));
1499         _assert(asn != NULL);
1500         team.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1501     }
1502 #endif
1503
1504     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1505         size_t alloc(sizeof(struct SuperBlob));
1506
1507         uint32_t special(0);
1508
1509         special = std::max(special, CSSLOT_REQUIREMENTS);
1510         alloc += sizeof(struct BlobIndex);
1511         if (!requirement.empty())
1512             alloc += 0xc;
1513         else
1514             alloc += requirement.size();
1515
1516         if (!entitlements.empty()) {
1517             special = std::max(special, CSSLOT_ENTITLEMENTS);
1518             alloc += sizeof(struct BlobIndex);
1519             alloc += sizeof(struct Blob);
1520             alloc += entitlements.size();
1521         }
1522
1523         special = std::max(special, CSSLOT_CODEDIRECTORY);
1524         alloc += sizeof(struct BlobIndex);
1525         alloc += sizeof(struct Blob);
1526         alloc += sizeof(struct CodeDirectory);
1527         alloc += identifier.size() + 1;
1528
1529         if (!team.empty())
1530             alloc += team.size() + 1;
1531
1532         if (!key.empty()) {
1533             alloc += sizeof(struct BlobIndex);
1534             alloc += sizeof(struct Blob);
1535             // XXX: this is just a "sufficiently large number"
1536             alloc += 0x3000;
1537         }
1538
1539         _foreach (slot, slots)
1540             special = std::max(special, slot.first);
1541
1542         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1543             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1544                 special = std::max(special, CSSLOT_INFOSLOT);
1545         }));
1546
1547         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1548         alloc = Align(alloc + (special + normal) * LDID_SHA1_DIGEST_LENGTH, 16);
1549         return alloc;
1550     }), fun([&](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1551         Blobs blobs;
1552
1553         if (true) {
1554             std::stringbuf data;
1555
1556             if (requirement.empty()) {
1557                 Blobs requirements;
1558                 put(data, CSMAGIC_REQUIREMENTS, requirements);
1559             } else {
1560                 put(data, requirement.data(), requirement.size());
1561             }
1562
1563             insert(blobs, CSSLOT_REQUIREMENTS, data);
1564         }
1565
1566         if (!entitlements.empty()) {
1567             std::stringbuf data;
1568             put(data, entitlements.data(), entitlements.size());
1569             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1570         }
1571
1572         if (true) {
1573             std::stringbuf data;
1574
1575             Slots posts(slots);
1576
1577             mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1578                 if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1579                     sha1(posts[CSSLOT_INFOSLOT], data, size);
1580             }));
1581
1582             uint32_t special(0);
1583             _foreach (blob, blobs)
1584                 special = std::max(special, blob.first);
1585             _foreach (slot, posts)
1586                 special = std::max(special, slot.first);
1587             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1588
1589             CodeDirectory directory;
1590             directory.version = Swap(uint32_t(0x00020200));
1591             directory.flags = Swap(uint32_t(0));
1592             directory.nSpecialSlots = Swap(special);
1593             directory.codeLimit = Swap(uint32_t(limit));
1594             directory.nCodeSlots = Swap(normal);
1595             directory.hashSize = LDID_SHA1_DIGEST_LENGTH;
1596             directory.hashType = CS_HASHTYPE_SHA1;
1597             directory.spare1 = 0x00;
1598             directory.pageSize = PageShift_;
1599             directory.spare2 = Swap(uint32_t(0));
1600             directory.scatterOffset = Swap(uint32_t(0));
1601             directory.spare3 = Swap(uint32_t(0));
1602             directory.codeLimit64 = Swap(uint64_t(0));
1603
1604             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1605
1606             directory.identOffset = Swap(uint32_t(offset));
1607             offset += identifier.size() + 1;
1608
1609             if (team.empty())
1610                 directory.teamIDOffset = Swap(uint32_t(0));
1611             else {
1612                 directory.teamIDOffset = Swap(uint32_t(offset));
1613                 offset += team.size() + 1;
1614             }
1615
1616             offset += LDID_SHA1_DIGEST_LENGTH * special;
1617             directory.hashOffset = Swap(uint32_t(offset));
1618             offset += LDID_SHA1_DIGEST_LENGTH * normal;
1619
1620             put(data, &directory, sizeof(directory));
1621
1622             put(data, identifier.c_str(), identifier.size() + 1);
1623             put(data, team.c_str(), team.size() + 1);
1624
1625             uint8_t storage[special + normal][LDID_SHA1_DIGEST_LENGTH];
1626             uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = storage + special;
1627
1628             memset(storage, 0, sizeof(*storage) * special);
1629
1630             _foreach (blob, blobs) {
1631                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1632                 sha1((uint8_t *) (hashes - blob.first), local, Swap(local->length));
1633             }
1634
1635             _foreach (slot, posts) {
1636                 _assert(sizeof(*hashes) == slot.second.size());
1637                 memcpy(hashes - slot.first, slot.second.data(), slot.second.size());
1638             }
1639
1640             if (normal != 1)
1641                 for (size_t i = 0; i != normal - 1; ++i)
1642                     sha1(hashes[i], (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1643             if (normal != 0)
1644                 sha1(hashes[normal - 1], top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1645
1646             put(data, storage, sizeof(storage));
1647
1648             insert(blobs, CSSLOT_CODEDIRECTORY, CSMAGIC_CODEDIRECTORY, data);
1649         }
1650
1651 #ifndef LDID_NOSMIME
1652         if (!key.empty()) {
1653             std::stringbuf data;
1654             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1655
1656             Stuff stuff(key);
1657             Buffer bio(sign);
1658
1659             Signature signature(stuff, sign);
1660             Buffer result(signature);
1661             std::string value(result);
1662             put(data, value.data(), value.size());
1663
1664             insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data);
1665         }
1666 #endif
1667
1668         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1669     }));
1670 }
1671
1672 #ifndef LDID_NOTOOLS
1673 static void Unsign(void *idata, size_t isize, std::streambuf &output) {
1674     Allocate(idata, isize, output, fun([](const MachHeader &mach_header, size_t size) -> size_t {
1675         return 0;
1676     }), fun([](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1677         return 0;
1678     }));
1679 }
1680
1681 std::string DiskFolder::Path(const std::string &path) {
1682     return path_ + "/" + path;
1683 }
1684
1685 DiskFolder::DiskFolder(const std::string &path) :
1686     path_(path)
1687 {
1688 }
1689
1690 DiskFolder::~DiskFolder() {
1691     if (!std::uncaught_exception())
1692         for (const auto &commit : commit_)
1693             Commit(commit.first, commit.second);
1694 }
1695
1696 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) {
1697     std::string path(Path(root) + base);
1698
1699     DIR *dir(opendir(path.c_str()));
1700     _assert(dir != NULL);
1701     _scope({ _syscall(closedir(dir)); });
1702
1703     while (auto child = readdir(dir)) {
1704         std::string name(child->d_name);
1705         if (name == "." || name == "..")
1706             continue;
1707         if (Starts(name, ".ldid."))
1708             continue;
1709
1710         bool directory;
1711
1712 #ifdef __WIN32__
1713         struct stat info;
1714         _syscall(stat((path + name).c_str(), &info));
1715         if (false);
1716         else if (S_ISDIR(info.st_mode))
1717             directory = true;
1718         else if (S_ISREG(info.st_mode))
1719             directory = false;
1720         else
1721             _assert_(false, "st_mode=%x", info.st_mode);
1722 #else
1723         switch (child->d_type) {
1724             case DT_DIR:
1725                 directory = true;
1726                 break;
1727             case DT_REG:
1728                 directory = false;
1729                 break;
1730             default:
1731                 _assert_(false, "d_type=%u", child->d_type);
1732         }
1733 #endif
1734
1735         if (directory)
1736             Find(root, base + name + "/", code);
1737         else
1738             code(base + name, fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1739                 std::string access(root + base + name);
1740                 _assert_(Open(access, fun([&](std::streambuf &data, const void *flag) {
1741                     auto from(path + name);
1742                     std::filebuf save;
1743                     commit_[from] = Temporary(save, from);
1744                     code(data, save);
1745                 })), "open(): %s", access.c_str());
1746             }));
1747     }
1748 }
1749
1750 void DiskFolder::Save(const std::string &path, const void *flag, const Functor<void (std::streambuf &)> &code) {
1751     std::filebuf save;
1752     auto from(Path(path));
1753     commit_[from] = Temporary(save, from);
1754     code(save);
1755 }
1756
1757 bool DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) {
1758     std::filebuf data;
1759     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
1760     if (result == NULL)
1761         return false;
1762     _assert(result == &data);
1763     code(data, NULL);
1764     return true;
1765 }
1766
1767 void DiskFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)>&code) {
1768     Find(path, "", code);
1769 }
1770 #endif
1771
1772 SubFolder::SubFolder(Folder &parent, const std::string &path) :
1773     parent_(parent),
1774     path_(path)
1775 {
1776 }
1777
1778 void SubFolder::Save(const std::string &path, const void *flag, const Functor<void (std::streambuf &)> &code) {
1779     return parent_.Save(path_ + path, flag, code);
1780 }
1781
1782 bool SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) {
1783     return parent_.Open(path_ + path, code);
1784 }
1785
1786 void SubFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1787     return parent_.Find(path_ + path, code);
1788 }
1789
1790 std::string UnionFolder::Map(const std::string &path) {
1791     auto remap(remaps_.find(path));
1792     if (remap == remaps_.end())
1793         return path;
1794     return remap->second;
1795 }
1796
1797 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 (const Functor<void (std::streambuf &, const void *)> &)> &save) {
1798     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
1799         code(file.substr(path.size()), fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1800             save(fun([&](std::streambuf &data, const void *flag) {
1801                 parent_.Save(file, flag, fun([&](std::streambuf &save) {
1802                     code(data, save);
1803                 }));
1804             }));
1805         }));
1806 }
1807
1808 UnionFolder::UnionFolder(Folder &parent) :
1809     parent_(parent)
1810 {
1811 }
1812
1813 void UnionFolder::Save(const std::string &path, const void *flag, const Functor<void (std::streambuf &)> &code) {
1814     return parent_.Save(Map(path), flag, code);
1815 }
1816
1817 bool UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) {
1818     auto file(resets_.find(path));
1819     if (file == resets_.end())
1820         return parent_.Open(Map(path), code);
1821     auto &entry(file->second);
1822
1823     auto &data(entry.first);
1824     data.pubseekpos(0, std::ios::in);
1825     code(data, entry.second);
1826     return true;
1827 }
1828
1829 void UnionFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code) {
1830     parent_.Find(path, fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &save) {
1831         if (deletes_.find(path + name) == deletes_.end())
1832             code(name, save);
1833     }));
1834
1835     for (auto &reset : resets_)
1836         Map(path, code, reset.first, fun([&](const Functor<void (std::streambuf &, const void *)> &code) {
1837             auto &entry(reset.second);
1838             entry.first.pubseekpos(0, std::ios::in);
1839             code(entry.first, entry.second);
1840         }));
1841
1842     for (auto &remap : remaps_)
1843         Map(path, code, remap.first, fun([&](const Functor<void (std::streambuf &, const void *)> &code) {
1844             parent_.Open(remap.second, fun([&](std::streambuf &data, const void *flag) {
1845                 code(data, flag);
1846             }));
1847         }));
1848 }
1849
1850 #ifndef LDID_NOTOOLS
1851 static size_t copy(std::streambuf &source, std::streambuf &target) {
1852     size_t total(0);
1853     for (;;) {
1854         char data[4096];
1855         size_t writ(source.sgetn(data, sizeof(data)));
1856         if (writ == 0)
1857             break;
1858         _assert(target.sputn(data, writ) == writ);
1859         total += writ;
1860     }
1861     return total;
1862 }
1863
1864 #ifndef LDID_NOPLIST
1865 static plist_t plist(const std::string &data) {
1866     plist_t plist(NULL);
1867     if (Starts(data, "bplist00"))
1868         plist_from_bin(data.data(), data.size(), &plist);
1869     else
1870         plist_from_xml(data.data(), data.size(), &plist);
1871     _assert(plist != NULL);
1872     return plist;
1873 }
1874
1875 static void plist_d(std::streambuf &buffer, const Functor<void (plist_t)> &code) {
1876     std::stringbuf data;
1877     copy(buffer, data);
1878     auto node(plist(data.str()));
1879     _scope({ plist_free(node); });
1880     _assert(plist_get_node_type(node) == PLIST_DICT);
1881     code(node);
1882 }
1883
1884 static std::string plist_s(plist_t node) {
1885     _assert(node != NULL);
1886     _assert(plist_get_node_type(node) == PLIST_STRING);
1887     char *data;
1888     plist_get_string_val(node, &data);
1889     _scope({ free(data); });
1890     return data;
1891 }
1892 #endif
1893
1894 enum Mode {
1895     NoMode,
1896     OptionalMode,
1897     OmitMode,
1898     NestedMode,
1899     TopMode,
1900 };
1901
1902 class Expression {
1903   private:
1904     regex_t regex_;
1905
1906   public:
1907     Expression(const std::string &code) {
1908         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED | REG_NOSUB) == 0, "regcomp()");
1909     }
1910
1911     ~Expression() {
1912         regfree(&regex_);
1913     }
1914
1915     bool operator ()(const std::string &data) const {
1916         auto value(regexec(&regex_, data.c_str(), 0, NULL, 0));
1917         if (value == REG_NOMATCH)
1918             return false;
1919         _assert_(value == 0, "regexec()");
1920         return true;
1921     }
1922 };
1923
1924 struct Rule {
1925     unsigned weight_;
1926     Mode mode_;
1927     std::string code_;
1928
1929     mutable std::auto_ptr<Expression> regex_;
1930
1931     Rule(unsigned weight, Mode mode, const std::string &code) :
1932         weight_(weight),
1933         mode_(mode),
1934         code_(code)
1935     {
1936     }
1937
1938     Rule(const Rule &rhs) :
1939         weight_(rhs.weight_),
1940         mode_(rhs.mode_),
1941         code_(rhs.code_)
1942     {
1943     }
1944
1945     void Compile() const {
1946         regex_.reset(new Expression(code_));
1947     }
1948
1949     bool operator ()(const std::string &data) const {
1950         _assert(regex_.get() != NULL);
1951         return (*regex_)(data);
1952     }
1953
1954     bool operator <(const Rule &rhs) const {
1955         if (weight_ > rhs.weight_)
1956             return true;
1957         if (weight_ < rhs.weight_)
1958             return false;
1959         return mode_ > rhs.mode_;
1960     }
1961 };
1962
1963 struct RuleCode {
1964     bool operator ()(const Rule *lhs, const Rule *rhs) const {
1965         return lhs->code_ < rhs->code_;
1966     }
1967 };
1968
1969 #ifndef LDID_NOPLIST
1970 static void Sign(const uint8_t *prefix, size_t size, std::streambuf &buffer, Hash &hash, std::streambuf &save, const std::string &identifier, const std::string &entitlements, const std::string &requirement, const std::string &key, const Slots &slots) {
1971     // XXX: this is a miserable fail
1972     std::stringbuf temp;
1973     put(temp, prefix, size);
1974     copy(buffer, temp);
1975     auto data(temp.str());
1976
1977     HashProxy proxy(hash, save);
1978     Sign(data.data(), data.size(), proxy, identifier, entitlements, requirement, key, slots);
1979 }
1980
1981 std::string Bundle(const std::string &root, Folder &folder, const std::string &key, std::map<std::string, Hash> &remote, const std::string &entitlements, const std::string &requirement) {
1982     std::string executable;
1983     std::string identifier;
1984
1985     static const std::string info("Info.plist");
1986
1987     _assert_(folder.Open(info, fun([&](std::streambuf &buffer, const void *flag) {
1988         plist_d(buffer, fun([&](plist_t node) {
1989             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
1990             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
1991         }));
1992     })), "open(): Info.plist");
1993
1994     static const std::string directory("_CodeSignature/");
1995     static const std::string signature(directory + "CodeResources");
1996
1997     std::map<std::string, std::multiset<Rule>> versions;
1998
1999     auto &rules1(versions[""]);
2000     auto &rules2(versions["2"]);
2001
2002     folder.Open(signature, fun([&](std::streambuf &buffer, const void *) {
2003         plist_d(buffer, fun([&](plist_t node) {
2004             // XXX: maybe attempt to preserve existing rules
2005         }));
2006     }));
2007
2008     if (true) {
2009         rules1.insert(Rule{1, NoMode, "^"});
2010         rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2011         rules1.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
2012         rules1.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
2013         rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2014         rules1.insert(Rule{1, NoMode, "^version.plist$"});
2015     }
2016
2017     if (true) {
2018         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
2019         rules2.insert(Rule{20, NoMode, "^"});
2020         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
2021         rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2022         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
2023         rules2.insert(Rule{1, NoMode, "^.*"});
2024         rules2.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"});
2025         rules2.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"});
2026         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
2027         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
2028         rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2029         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
2030         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
2031         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
2032     }
2033
2034     std::map<std::string, Hash> local;
2035
2036     static Expression nested("^PlugIns/[^/]*\\.appex/Info\\.plist$");
2037
2038     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
2039         if (!nested(name))
2040             return;
2041         auto bundle(root + Split(name).dir);
2042         SubFolder subfolder(folder, bundle);
2043         Bundle(bundle, subfolder, key, local, "", "");
2044     }));
2045
2046     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
2047         // BundleDiskRep::adjustResources -> builder.addExclusion
2048         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
2049             return;
2050
2051         auto &hash(local[name]);
2052         if (hash.ready_)
2053             return;
2054
2055         code(fun([&](std::streambuf &data, std::streambuf &save) {
2056             union {
2057                 struct {
2058                     uint32_t magic;
2059                     uint32_t count;
2060                 };
2061
2062                 uint8_t bytes[8];
2063             } header;
2064
2065             auto size(most(data, &header.bytes, sizeof(header.bytes)));
2066             if (size == sizeof(header.bytes))
2067                 switch (Swap(header.magic)) {
2068                     case FAT_MAGIC:
2069                         // Java class file format
2070                         if (Swap(header.count) >= 40)
2071                             break;
2072                     case FAT_CIGAM:
2073                     case MH_MAGIC: case MH_MAGIC_64:
2074                     case MH_CIGAM: case MH_CIGAM_64:
2075                         Slots slots;
2076                         Sign(header.bytes, size, data, hash, save, identifier, "", "", key, slots);
2077                         return;
2078                 }
2079
2080             HashProxy proxy(hash, save);
2081             put(proxy, header.bytes, size);
2082             copy(data, proxy);
2083         }));
2084
2085         _assert(hash.ready_);
2086     }));
2087
2088     auto plist(plist_new_dict());
2089     _scope({ plist_free(plist); });
2090
2091     for (const auto &version : versions) {
2092         auto files(plist_new_dict());
2093         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2094
2095         for (const auto &rule : version.second)
2096             rule.Compile();
2097
2098         bool old(&version.second == &rules1);
2099
2100         for (const auto &hash : local)
2101             for (const auto &rule : version.second)
2102                 if (rule(hash.first)) {
2103                     if (rule.mode_ == NestedMode) {
2104                         // XXX: implement
2105                     } else if (rule.mode_ == NoMode && old)
2106                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(hash.second.sha1_, sizeof(hash.second.sha1_)));
2107                     else if (rule.mode_ != OmitMode) {
2108                         auto entry(plist_new_dict());
2109                         plist_dict_set_item(entry, "hash", plist_new_data(hash.second.sha1_, sizeof(hash.second.sha1_)));
2110                         if (!old)
2111                             plist_dict_set_item(entry, "hash2", plist_new_data(hash.second.sha256_, sizeof(hash.second.sha256_)));
2112                         if (rule.mode_ == OptionalMode)
2113                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2114                         plist_dict_set_item(files, hash.first.c_str(), entry);
2115                     }
2116
2117                     break;
2118                 }
2119     }
2120
2121     for (const auto &version : versions) {
2122         auto rules(plist_new_dict());
2123         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2124
2125         std::multiset<const Rule *, RuleCode> ordered;
2126         for (const auto &rule : version.second)
2127             ordered.insert(&rule);
2128
2129         for (const auto &rule : ordered)
2130             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2131                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2132             else {
2133                 auto entry(plist_new_dict());
2134                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2135
2136                 switch (rule->mode_) {
2137                     case NoMode:
2138                         break;
2139                     case OmitMode:
2140                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2141                         break;
2142                     case OptionalMode:
2143                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2144                         break;
2145                     case NestedMode:
2146                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2147                         break;
2148                     case TopMode:
2149                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2150                         break;
2151                 }
2152
2153                 if (rule->weight_ >= 10000)
2154                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2155                 else if (rule->weight_ != 1)
2156                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2157             }
2158     }
2159
2160     folder.Save(signature, NULL, fun([&](std::streambuf &save) {
2161         HashProxy proxy(local[signature], save);
2162         char *xml(NULL);
2163         uint32_t size;
2164         plist_to_xml(plist, &xml, &size);
2165         _scope({ free(xml); });
2166         put(proxy, xml, size);
2167     }));
2168
2169     folder.Open(executable, fun([&](std::streambuf &buffer, const void *flag) {
2170         folder.Save(executable, flag, fun([&](std::streambuf &save) {
2171             Slots slots;
2172             slots[1] = local.at(info);
2173             slots[3] = local.at(signature);
2174             Sign(NULL, 0, buffer, local[executable], save, identifier, entitlements, requirement, key, slots);
2175         }));
2176     }));
2177
2178     for (const auto &hash : local)
2179         remote[root + hash.first] = hash.second;
2180
2181     return executable;
2182 }
2183
2184 std::string Bundle(const std::string &root, Folder &folder, const std::string &key, const std::string &entitlements, const std::string &requirement) {
2185     std::map<std::string, Hash> hashes;
2186     return Bundle(root, folder, key, hashes, entitlements, requirement);
2187 }
2188 #endif
2189
2190 #endif
2191 }
2192
2193 #ifndef LDID_NOTOOLS
2194 int main(int argc, char *argv[]) {
2195 #ifndef LDID_NOSMIME
2196     OpenSSL_add_all_algorithms();
2197 #endif
2198
2199     union {
2200         uint16_t word;
2201         uint8_t byte[2];
2202     } endian = {1};
2203
2204     little_ = endian.byte[0];
2205
2206     bool flag_r(false);
2207     bool flag_e(false);
2208     bool flag_q(false);
2209
2210 #ifndef LDID_NOFLAGT
2211     bool flag_T(false);
2212 #endif
2213
2214     bool flag_S(false);
2215     bool flag_s(false);
2216
2217     bool flag_D(false);
2218
2219     bool flag_A(false);
2220     bool flag_a(false);
2221
2222     bool flag_u(false);
2223
2224     uint32_t flag_CPUType(_not(uint32_t));
2225     uint32_t flag_CPUSubtype(_not(uint32_t));
2226
2227     const char *flag_I(NULL);
2228
2229 #ifndef LDID_NOFLAGT
2230     bool timeh(false);
2231     uint32_t timev(0);
2232 #endif
2233
2234     Map entitlements;
2235     Map requirement;
2236     Map key;
2237     ldid::Slots slots;
2238
2239     std::vector<std::string> files;
2240
2241     if (argc == 1) {
2242         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2243         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2244         fprintf(stderr, "   %s -S cat\n", argv[0]);
2245         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2246         exit(0);
2247     }
2248
2249     for (int argi(1); argi != argc; ++argi)
2250         if (argv[argi][0] != '-')
2251             files.push_back(argv[argi]);
2252         else switch (argv[argi][1]) {
2253             case 'r':
2254                 _assert(!flag_s);
2255                 _assert(!flag_S);
2256                 flag_r = true;
2257             break;
2258
2259             case 'e': flag_e = true; break;
2260
2261             case 'E': {
2262                 const char *slot = argv[argi] + 2;
2263                 const char *colon = strchr(slot, ':');
2264                 _assert(colon != NULL);
2265                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2266                 char *arge;
2267                 unsigned number(strtoul(slot, &arge, 0));
2268                 _assert(arge == colon);
2269                 sha1(slots[number], file.data(), file.size());
2270             } break;
2271
2272             case 'q': flag_q = true; break;
2273
2274             case 'Q': {
2275                 const char *xml = argv[argi] + 2;
2276                 requirement.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2277             } break;
2278
2279             case 'D': flag_D = true; break;
2280
2281             case 'a': flag_a = true; break;
2282
2283             case 'A':
2284                 _assert(!flag_A);
2285                 flag_A = true;
2286                 if (argv[argi][2] != '\0') {
2287                     const char *cpu = argv[argi] + 2;
2288                     const char *colon = strchr(cpu, ':');
2289                     _assert(colon != NULL);
2290                     char *arge;
2291                     flag_CPUType = strtoul(cpu, &arge, 0);
2292                     _assert(arge == colon);
2293                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2294                     _assert(arge == argv[argi] + strlen(argv[argi]));
2295                 }
2296             break;
2297
2298             case 's':
2299                 _assert(!flag_r);
2300                 _assert(!flag_S);
2301                 flag_s = true;
2302             break;
2303
2304             case 'S':
2305                 _assert(!flag_r);
2306                 _assert(!flag_s);
2307                 flag_S = true;
2308                 if (argv[argi][2] != '\0') {
2309                     const char *xml = argv[argi] + 2;
2310                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2311                 }
2312             break;
2313
2314             case 'K':
2315                 if (argv[argi][2] != '\0')
2316                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2317             break;
2318
2319 #ifndef LDID_NOFLAGT
2320             case 'T': {
2321                 flag_T = true;
2322                 if (argv[argi][2] == '-')
2323                     timeh = true;
2324                 else {
2325                     char *arge;
2326                     timev = strtoul(argv[argi] + 2, &arge, 0);
2327                     _assert(arge == argv[argi] + strlen(argv[argi]));
2328                 }
2329             } break;
2330 #endif
2331
2332             case 'u': {
2333                 flag_u = true;
2334             } break;
2335
2336             case 'I': {
2337                 flag_I = argv[argi] + 2;
2338             } break;
2339
2340             default:
2341                 goto usage;
2342             break;
2343         }
2344
2345     _assert(flag_S || key.empty());
2346     _assert(flag_S || flag_I == NULL);
2347
2348     if (files.empty()) usage: {
2349         exit(0);
2350     }
2351
2352     size_t filei(0), filee(0);
2353     _foreach (file, files) try {
2354         std::string path(file);
2355
2356         struct stat info;
2357         _syscall(stat(path.c_str(), &info));
2358
2359         if (S_ISDIR(info.st_mode)) {
2360 #ifndef LDID_NOPLIST
2361             _assert(!flag_r);
2362             ldid::DiskFolder folder(path);
2363             path += "/" + Bundle("", folder, key, entitlements, requirement);
2364 #else
2365             _assert(false);
2366 #endif
2367         } else if (flag_S || flag_r) {
2368             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2369
2370             std::filebuf output;
2371             Split split(path);
2372             auto temp(Temporary(output, split));
2373
2374             if (flag_r)
2375                 ldid::Unsign(input.data(), input.size(), output);
2376             else {
2377                 std::string identifier(flag_I ?: split.base.c_str());
2378                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, requirement, key, slots);
2379             }
2380
2381             Commit(path, temp);
2382         }
2383
2384         bool modify(false);
2385 #ifndef LDID_NOFLAGT
2386         if (flag_T)
2387             modify = true;
2388 #endif
2389         if (flag_s)
2390             modify = true;
2391
2392         Map mapping(path, modify);
2393         FatHeader fat_header(mapping.data(), mapping.size());
2394
2395         _foreach (mach_header, fat_header.GetMachHeaders()) {
2396             struct linkedit_data_command *signature(NULL);
2397             struct encryption_info_command *encryption(NULL);
2398
2399             if (flag_A) {
2400                 if (mach_header.GetCPUType() != flag_CPUType)
2401                     continue;
2402                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2403                     continue;
2404             }
2405
2406             if (flag_a)
2407                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2408
2409             _foreach (load_command, mach_header.GetLoadCommands()) {
2410                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2411
2412                 if (false);
2413                 else if (cmd == LC_CODE_SIGNATURE)
2414                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2415                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2416                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2417                 else if (cmd == LC_LOAD_DYLIB) {
2418                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2419                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2420
2421                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2422                         if (flag_u) {
2423                             Version version;
2424                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2425                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2426                         }
2427                     }
2428                 }
2429 #ifndef LDID_NOFLAGT
2430                 else if (cmd == LC_ID_DYLIB) {
2431                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2432
2433                     if (flag_T) {
2434                         uint32_t timed;
2435
2436                         if (!timeh)
2437                             timed = timev;
2438                         else {
2439                             dylib_command->dylib.timestamp = 0;
2440                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2441                         }
2442
2443                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2444                     }
2445                 }
2446 #endif
2447             }
2448
2449             if (flag_D) {
2450                 _assert(encryption != NULL);
2451                 encryption->cryptid = mach_header.Swap(0);
2452             }
2453
2454             if (flag_e) {
2455                 _assert(signature != NULL);
2456
2457                 uint32_t data = mach_header.Swap(signature->dataoff);
2458
2459                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2460                 uint8_t *blob = top + data;
2461                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2462
2463                 for (size_t index(0); index != Swap(super->count); ++index)
2464                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2465                         uint32_t begin = Swap(super->index[index].offset);
2466                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2467                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2468                     }
2469             }
2470
2471             if (flag_q) {
2472                 _assert(signature != NULL);
2473
2474                 uint32_t data = mach_header.Swap(signature->dataoff);
2475
2476                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2477                 uint8_t *blob = top + data;
2478                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2479
2480                 for (size_t index(0); index != Swap(super->count); ++index)
2481                     if (Swap(super->index[index].type) == CSSLOT_REQUIREMENTS) {
2482                         uint32_t begin = Swap(super->index[index].offset);
2483                         struct Blob *requirement = reinterpret_cast<struct Blob *>(blob + begin);
2484                         fwrite(requirement, 1, Swap(requirement->length), stdout);
2485                     }
2486             }
2487
2488             if (flag_s) {
2489                 _assert(signature != NULL);
2490
2491                 uint32_t data = mach_header.Swap(signature->dataoff);
2492
2493                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2494                 uint8_t *blob = top + data;
2495                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2496
2497                 for (size_t index(0); index != Swap(super->count); ++index)
2498                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2499                         uint32_t begin = Swap(super->index[index].offset);
2500                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin + sizeof(Blob));
2501
2502                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2503                         uint32_t pages = Swap(directory->nCodeSlots);
2504
2505                         if (pages != 1)
2506                             for (size_t i = 0; i != pages - 1; ++i)
2507                                 sha1(hashes[i], top + PageSize_ * i, PageSize_);
2508                         if (pages != 0)
2509                             sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1);
2510                     }
2511             }
2512         }
2513
2514         ++filei;
2515     } catch (const char *) {
2516         ++filee;
2517         ++filei;
2518     }
2519
2520     return filee;
2521 }
2522 #endif