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 const std::string &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     auto &save(blobs[slot]);
1194     std::swap(save, value);
1195     return save;
1196 }
1197
1198 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1199     size_t total(0);
1200     _foreach (blob, blobs)
1201         total += blob.second.size();
1202
1203     struct SuperBlob super;
1204     super.blob.magic = Swap(magic);
1205     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1206     super.count = Swap(uint32_t(blobs.size()));
1207     put(output, &super, sizeof(super));
1208
1209     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1210
1211     _foreach (blob, blobs) {
1212         BlobIndex index;
1213         index.type = Swap(blob.first);
1214         index.offset = Swap(uint32_t(offset));
1215         put(output, &index, sizeof(index));
1216         offset += blob.second.size();
1217     }
1218
1219     _foreach (blob, blobs)
1220         put(output, blob.second.data(), blob.second.size());
1221
1222     return offset;
1223 }
1224
1225 #ifndef LDID_NOSMIME
1226 class Buffer {
1227   private:
1228     BIO *bio_;
1229
1230   public:
1231     Buffer(BIO *bio) :
1232         bio_(bio)
1233     {
1234         _assert(bio_ != NULL);
1235     }
1236
1237     Buffer() :
1238         bio_(BIO_new(BIO_s_mem()))
1239     {
1240     }
1241
1242     Buffer(const char *data, size_t size) :
1243         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1244     {
1245     }
1246
1247     Buffer(const std::string &data) :
1248         Buffer(data.data(), data.size())
1249     {
1250     }
1251
1252     Buffer(PKCS7 *pkcs) :
1253         Buffer()
1254     {
1255         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1256     }
1257
1258     ~Buffer() {
1259         BIO_free_all(bio_);
1260     }
1261
1262     operator BIO *() const {
1263         return bio_;
1264     }
1265
1266     explicit operator std::string() const {
1267         char *data;
1268         auto size(BIO_get_mem_data(bio_, &data));
1269         return std::string(data, size);
1270     }
1271 };
1272
1273 class Stuff {
1274   private:
1275     PKCS12 *value_;
1276     EVP_PKEY *key_;
1277     X509 *cert_;
1278     STACK_OF(X509) *ca_;
1279
1280   public:
1281     Stuff(BIO *bio) :
1282         value_(d2i_PKCS12_bio(bio, NULL)),
1283         ca_(NULL)
1284     {
1285         _assert(value_ != NULL);
1286         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1287         _assert(key_ != NULL);
1288         _assert(cert_ != NULL);
1289     }
1290
1291     Stuff(const std::string &data) :
1292         Stuff(Buffer(data))
1293     {
1294     }
1295
1296     ~Stuff() {
1297         sk_X509_pop_free(ca_, X509_free);
1298         X509_free(cert_);
1299         EVP_PKEY_free(key_);
1300         PKCS12_free(value_);
1301     }
1302
1303     operator PKCS12 *() const {
1304         return value_;
1305     }
1306
1307     operator EVP_PKEY *() const {
1308         return key_;
1309     }
1310
1311     operator X509 *() const {
1312         return cert_;
1313     }
1314
1315     operator STACK_OF(X509) *() const {
1316         return ca_;
1317     }
1318 };
1319
1320 class Signature {
1321   private:
1322     PKCS7 *value_;
1323
1324   public:
1325     Signature(const Stuff &stuff, const Buffer &data) :
1326         value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED))
1327     {
1328         _assert(value_ != NULL);
1329     }
1330
1331     ~Signature() {
1332         PKCS7_free(value_);
1333     }
1334
1335     operator PKCS7 *() const {
1336         return value_;
1337     }
1338 };
1339 #endif
1340
1341 class NullBuffer :
1342     public std::streambuf
1343 {
1344   public:
1345     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1346         return size;
1347     }
1348
1349     virtual int_type overflow(int_type next) {
1350         return next;
1351     }
1352 };
1353
1354 class Hash {
1355   public:
1356     char sha1_[LDID_SHA1_DIGEST_LENGTH];
1357     char sha256_[LDID_SHA256_DIGEST_LENGTH];
1358
1359     operator std::vector<char>() const {
1360         return {sha1_, sha1_ + sizeof(sha1_)};
1361     }
1362 };
1363
1364 class HashBuffer :
1365     public std::streambuf
1366 {
1367   private:
1368     Hash &hash_;
1369
1370     LDID_SHA1_CTX sha1_;
1371     LDID_SHA256_CTX sha256_;
1372
1373   public:
1374     HashBuffer(Hash &hash) :
1375         hash_(hash)
1376     {
1377         LDID_SHA1_Init(&sha1_);
1378         LDID_SHA256_Init(&sha256_);
1379     }
1380
1381     ~HashBuffer() {
1382         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.sha1_), &sha1_);
1383         LDID_SHA256_Final(reinterpret_cast<uint8_t *>(hash_.sha256_), &sha256_);
1384     }
1385
1386     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1387         LDID_SHA1_Update(&sha1_, data, size);
1388         LDID_SHA256_Update(&sha256_, data, size);
1389         return size;
1390     }
1391
1392     virtual int_type overflow(int_type next) {
1393         if (next == traits_type::eof())
1394             return sync();
1395         char value(next);
1396         xsputn(&value, 1);
1397         return next;
1398     }
1399 };
1400
1401 class HashProxy :
1402     public HashBuffer
1403 {
1404   private:
1405     std::streambuf &buffer_;
1406
1407   public:
1408     HashProxy(Hash &hash, std::streambuf &buffer) :
1409         HashBuffer(hash),
1410         buffer_(buffer)
1411     {
1412     }
1413
1414     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1415         _assert(HashBuffer::xsputn(data, size) == size);
1416         return buffer_.sputn(data, size);
1417     }
1418 };
1419
1420 #ifndef LDID_NOTOOLS
1421 static bool Starts(const std::string &lhs, const std::string &rhs) {
1422     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1423 }
1424
1425 class Split {
1426   public:
1427     std::string dir;
1428     std::string base;
1429
1430     Split(const std::string &path) {
1431         size_t slash(path.rfind('/'));
1432         if (slash == std::string::npos)
1433             base = path;
1434         else {
1435             dir = path.substr(0, slash + 1);
1436             base = path.substr(slash + 1);
1437         }
1438     }
1439 };
1440
1441 static void mkdir_p(const std::string &path) {
1442     if (path.empty())
1443         return;
1444 #ifdef __WIN32__
1445     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1446         return;
1447 #else
1448     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1449         return;
1450 #endif
1451     auto slash(path.rfind('/', path.size() - 1));
1452     if (slash == std::string::npos)
1453         return;
1454     mkdir_p(path.substr(0, slash));
1455 }
1456
1457 static std::string Temporary(std::filebuf &file, const Split &split) {
1458     std::string temp(split.dir + ".ldid." + split.base);
1459     mkdir_p(split.dir);
1460     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1461     return temp;
1462 }
1463
1464 static void Commit(const std::string &path, const std::string &temp) {
1465     struct stat info;
1466     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1467 #ifndef __WIN32__
1468         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1469 #endif
1470         _syscall(chmod(temp.c_str(), info.st_mode));
1471     }
1472
1473     _syscall(rename(temp.c_str(), path.c_str()));
1474 }
1475 #endif
1476
1477 namespace ldid {
1478
1479 std::vector<char> 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) {
1480     std::vector<char> hash(LDID_SHA1_DIGEST_LENGTH);
1481
1482     std::string team;
1483
1484 #ifndef LDID_NOSMIME
1485     if (!key.empty()) {
1486         Stuff stuff(key);
1487         auto name(X509_get_subject_name(stuff));
1488         _assert(name != NULL);
1489         auto index(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, -1));
1490         _assert(index >= 0);
1491         auto next(X509_NAME_get_index_by_NID(name, NID_organizationalUnitName, index));
1492         _assert(next == -1);
1493         auto entry(X509_NAME_get_entry(name, index));
1494         _assert(entry != NULL);
1495         auto asn(X509_NAME_ENTRY_get_data(entry));
1496         _assert(asn != NULL);
1497         team.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1498     }
1499 #endif
1500
1501     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1502         size_t alloc(sizeof(struct SuperBlob));
1503
1504         uint32_t special(0);
1505
1506         special = std::max(special, CSSLOT_REQUIREMENTS);
1507         alloc += sizeof(struct BlobIndex);
1508         if (requirement.empty())
1509             alloc += 0xc;
1510         else
1511             alloc += requirement.size();
1512
1513         if (!entitlements.empty()) {
1514             special = std::max(special, CSSLOT_ENTITLEMENTS);
1515             alloc += sizeof(struct BlobIndex);
1516             alloc += sizeof(struct Blob);
1517             alloc += entitlements.size();
1518         }
1519
1520         special = std::max(special, CSSLOT_CODEDIRECTORY);
1521         alloc += sizeof(struct BlobIndex);
1522         alloc += sizeof(struct Blob);
1523         alloc += sizeof(struct CodeDirectory);
1524         alloc += identifier.size() + 1;
1525
1526         if (!team.empty())
1527             alloc += team.size() + 1;
1528
1529         if (!key.empty()) {
1530             alloc += sizeof(struct BlobIndex);
1531             alloc += sizeof(struct Blob);
1532             // XXX: this is just a "sufficiently large number"
1533             alloc += 0x3000;
1534         }
1535
1536         _foreach (slot, slots)
1537             special = std::max(special, slot.first);
1538
1539         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1540             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1541                 special = std::max(special, CSSLOT_INFOSLOT);
1542         }));
1543
1544         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1545         alloc = Align(alloc + (special + normal) * LDID_SHA1_DIGEST_LENGTH, 16);
1546         return alloc;
1547     }), fun([&](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t {
1548         Blobs blobs;
1549
1550         if (true) {
1551             std::stringbuf data;
1552
1553             if (requirement.empty()) {
1554                 Blobs requirements;
1555                 put(data, CSMAGIC_REQUIREMENTS, requirements);
1556             } else {
1557                 put(data, requirement.data(), requirement.size());
1558             }
1559
1560             insert(blobs, CSSLOT_REQUIREMENTS, data);
1561         }
1562
1563         if (!entitlements.empty()) {
1564             std::stringbuf data;
1565             put(data, entitlements.data(), entitlements.size());
1566             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1567         }
1568
1569         if (true) {
1570             std::stringbuf data;
1571
1572             Slots posts(slots);
1573
1574             mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1575                 if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1576                     sha1(posts[CSSLOT_INFOSLOT], data, size);
1577             }));
1578
1579             uint32_t special(0);
1580             _foreach (blob, blobs)
1581                 special = std::max(special, blob.first);
1582             _foreach (slot, posts)
1583                 special = std::max(special, slot.first);
1584             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1585
1586             CodeDirectory directory;
1587             directory.version = Swap(uint32_t(0x00020200));
1588             directory.flags = Swap(uint32_t(0));
1589             directory.nSpecialSlots = Swap(special);
1590             directory.codeLimit = Swap(uint32_t(limit));
1591             directory.nCodeSlots = Swap(normal);
1592             directory.hashSize = LDID_SHA1_DIGEST_LENGTH;
1593             directory.hashType = CS_HASHTYPE_SHA1;
1594             directory.spare1 = 0x00;
1595             directory.pageSize = PageShift_;
1596             directory.spare2 = Swap(uint32_t(0));
1597             directory.scatterOffset = Swap(uint32_t(0));
1598             directory.spare3 = Swap(uint32_t(0));
1599             directory.codeLimit64 = Swap(uint64_t(0));
1600
1601             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1602
1603             directory.identOffset = Swap(uint32_t(offset));
1604             offset += identifier.size() + 1;
1605
1606             if (team.empty())
1607                 directory.teamIDOffset = Swap(uint32_t(0));
1608             else {
1609                 directory.teamIDOffset = Swap(uint32_t(offset));
1610                 offset += team.size() + 1;
1611             }
1612
1613             offset += LDID_SHA1_DIGEST_LENGTH * special;
1614             directory.hashOffset = Swap(uint32_t(offset));
1615             offset += LDID_SHA1_DIGEST_LENGTH * normal;
1616
1617             put(data, &directory, sizeof(directory));
1618
1619             put(data, identifier.c_str(), identifier.size() + 1);
1620             put(data, team.c_str(), team.size() + 1);
1621
1622             uint8_t storage[special + normal][LDID_SHA1_DIGEST_LENGTH];
1623             uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = storage + special;
1624
1625             memset(storage, 0, sizeof(*storage) * special);
1626
1627             _foreach (blob, blobs) {
1628                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1629                 sha1((uint8_t *) (hashes - blob.first), local, Swap(local->length));
1630             }
1631
1632             _foreach (slot, posts) {
1633                 _assert(sizeof(*hashes) == slot.second.size());
1634                 memcpy(hashes - slot.first, slot.second.data(), slot.second.size());
1635             }
1636
1637             if (normal != 1)
1638                 for (size_t i = 0; i != normal - 1; ++i)
1639                     sha1(hashes[i], (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1640             if (normal != 0)
1641                 sha1(hashes[normal - 1], top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1642
1643             put(data, storage, sizeof(storage));
1644
1645             const auto &save(insert(blobs, CSSLOT_CODEDIRECTORY, CSMAGIC_CODEDIRECTORY, data));
1646             sha1(hash, save.data(), save.size());
1647         }
1648
1649 #ifndef LDID_NOSMIME
1650         if (!key.empty()) {
1651             std::stringbuf data;
1652             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
1653
1654             Stuff stuff(key);
1655             Buffer bio(sign);
1656
1657             Signature signature(stuff, sign);
1658             Buffer result(signature);
1659             std::string value(result);
1660             put(data, value.data(), value.size());
1661
1662             insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data);
1663         }
1664 #endif
1665
1666         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
1667     }));
1668
1669     return hash;
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 #ifndef __WIN32__
1697 std::string readlink(const std::string &path) {
1698     for (size_t size(1024); ; size *= 2) {
1699         std::string data;
1700         data.resize(size);
1701
1702         int writ(_syscall(::readlink(path.c_str(), &data[0], data.size())));
1703         if (size_t(writ) >= size)
1704             continue;
1705
1706         data.resize(writ);
1707         return data;
1708     }
1709 }
1710 #endif
1711
1712 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, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) {
1713     std::string path(Path(root) + base);
1714
1715     DIR *dir(opendir(path.c_str()));
1716     _assert(dir != NULL);
1717     _scope({ _syscall(closedir(dir)); });
1718
1719     while (auto child = readdir(dir)) {
1720         std::string name(child->d_name);
1721         if (name == "." || name == "..")
1722             continue;
1723         if (Starts(name, ".ldid."))
1724             continue;
1725
1726         bool directory;
1727
1728 #ifdef __WIN32__
1729         struct stat info;
1730         _syscall(stat((path + name).c_str(), &info));
1731         if (false);
1732         else if (S_ISDIR(info.st_mode))
1733             directory = true;
1734         else if (S_ISREG(info.st_mode))
1735             directory = false;
1736         else
1737             _assert_(false, "st_mode=%x", info.st_mode);
1738 #else
1739         switch (child->d_type) {
1740             case DT_DIR:
1741                 directory = true;
1742                 break;
1743             case DT_REG:
1744                 directory = false;
1745                 break;
1746             case DT_LNK:
1747                 link(base + name, fun([&]() { return readlink(path + name); }));
1748                 continue;
1749             default:
1750                 _assert_(false, "d_type=%u", child->d_type);
1751         }
1752 #endif
1753
1754         if (directory)
1755             Find(root, base + name + "/", code, link);
1756         else
1757             code(base + name, fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1758                 std::string access(root + base + name);
1759                 Open(access, fun([&](std::streambuf &data, const void *flag) {
1760                     auto from(path + name);
1761                     std::filebuf save;
1762                     commit_[from] = Temporary(save, from);
1763                     code(data, save);
1764                 }));
1765             }));
1766     }
1767 }
1768
1769 void DiskFolder::Save(const std::string &path, const void *flag, const Functor<void (std::streambuf &)> &code) {
1770     std::filebuf save;
1771     auto from(Path(path));
1772     commit_[from] = Temporary(save, from);
1773     code(save);
1774 }
1775
1776 bool DiskFolder::Look(const std::string &path) {
1777     return _syscall(access(Path(path).c_str(), R_OK), ENOENT) == 0;
1778 }
1779
1780 void DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) {
1781     std::filebuf data;
1782     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
1783     _assert_(result == &data, "DiskFolder::Open(%s)", path.c_str());
1784     code(data, NULL);
1785 }
1786
1787 void DiskFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) {
1788     Find(path, "", code, link);
1789 }
1790 #endif
1791
1792 SubFolder::SubFolder(Folder &parent, const std::string &path) :
1793     parent_(parent),
1794     path_(path)
1795 {
1796 }
1797
1798 void SubFolder::Save(const std::string &path, const void *flag, const Functor<void (std::streambuf &)> &code) {
1799     return parent_.Save(path_ + path, flag, code);
1800 }
1801
1802 bool SubFolder::Look(const std::string &path) {
1803     return parent_.Look(path_ + path);
1804 }
1805
1806 void SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) {
1807     return parent_.Open(path_ + path, code);
1808 }
1809
1810 void SubFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) {
1811     return parent_.Find(path_ + path, code, link);
1812 }
1813
1814 std::string UnionFolder::Map(const std::string &path) {
1815     auto remap(remaps_.find(path));
1816     if (remap == remaps_.end())
1817         return path;
1818     return remap->second;
1819 }
1820
1821 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) {
1822     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
1823         code(file.substr(path.size()), fun([&](const Functor<void (std::streambuf &, std::streambuf &)> &code) {
1824             save(fun([&](std::streambuf &data, const void *flag) {
1825                 parent_.Save(file, flag, fun([&](std::streambuf &save) {
1826                     code(data, save);
1827                 }));
1828             }));
1829         }));
1830 }
1831
1832 UnionFolder::UnionFolder(Folder &parent) :
1833     parent_(parent)
1834 {
1835 }
1836
1837 void UnionFolder::Save(const std::string &path, const void *flag, const Functor<void (std::streambuf &)> &code) {
1838     return parent_.Save(Map(path), flag, code);
1839 }
1840
1841 bool UnionFolder::Look(const std::string &path) {
1842     auto file(resets_.find(path));
1843     if (file != resets_.end())
1844         return true;
1845     return parent_.Look(Map(path));
1846 }
1847
1848 void UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) {
1849     auto file(resets_.find(path));
1850     if (file == resets_.end())
1851         return parent_.Open(Map(path), code);
1852     auto &entry(file->second);
1853
1854     auto &data(entry.first);
1855     data.pubseekpos(0, std::ios::in);
1856     code(data, entry.second);
1857 }
1858
1859 void UnionFolder::Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) {
1860     parent_.Find(path, fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &save) {
1861         if (deletes_.find(path + name) == deletes_.end())
1862             code(name, save);
1863     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
1864         if (deletes_.find(path + name) == deletes_.end())
1865             link(name, read);
1866     }));
1867
1868     for (auto &reset : resets_)
1869         Map(path, code, reset.first, fun([&](const Functor<void (std::streambuf &, const void *)> &code) {
1870             auto &entry(reset.second);
1871             entry.first.pubseekpos(0, std::ios::in);
1872             code(entry.first, entry.second);
1873         }));
1874
1875     for (auto &remap : remaps_)
1876         Map(path, code, remap.first, fun([&](const Functor<void (std::streambuf &, const void *)> &code) {
1877             parent_.Open(remap.second, fun([&](std::streambuf &data, const void *flag) {
1878                 code(data, flag);
1879             }));
1880         }));
1881 }
1882
1883 #ifndef LDID_NOTOOLS
1884 static size_t copy(std::streambuf &source, std::streambuf &target) {
1885     size_t total(0);
1886     for (;;) {
1887         char data[4096];
1888         size_t writ(source.sgetn(data, sizeof(data)));
1889         if (writ == 0)
1890             break;
1891         _assert(target.sputn(data, writ) == writ);
1892         total += writ;
1893     }
1894     return total;
1895 }
1896
1897 #ifndef LDID_NOPLIST
1898 static plist_t plist(const std::string &data) {
1899     plist_t plist(NULL);
1900     if (Starts(data, "bplist00"))
1901         plist_from_bin(data.data(), data.size(), &plist);
1902     else
1903         plist_from_xml(data.data(), data.size(), &plist);
1904     _assert(plist != NULL);
1905     return plist;
1906 }
1907
1908 static void plist_d(std::streambuf &buffer, const Functor<void (plist_t)> &code) {
1909     std::stringbuf data;
1910     copy(buffer, data);
1911     auto node(plist(data.str()));
1912     _scope({ plist_free(node); });
1913     _assert(plist_get_node_type(node) == PLIST_DICT);
1914     code(node);
1915 }
1916
1917 static std::string plist_s(plist_t node) {
1918     _assert(node != NULL);
1919     _assert(plist_get_node_type(node) == PLIST_STRING);
1920     char *data;
1921     plist_get_string_val(node, &data);
1922     _scope({ free(data); });
1923     return data;
1924 }
1925 #endif
1926
1927 enum Mode {
1928     NoMode,
1929     OptionalMode,
1930     OmitMode,
1931     NestedMode,
1932     TopMode,
1933 };
1934
1935 class Expression {
1936   private:
1937     regex_t regex_;
1938     std::vector<std::string> matches_;
1939
1940   public:
1941     Expression(const std::string &code) {
1942         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED) == 0, "regcomp()");
1943         matches_.resize(regex_.re_nsub + 1);
1944     }
1945
1946     ~Expression() {
1947         regfree(&regex_);
1948     }
1949
1950     bool operator ()(const std::string &data) {
1951         regmatch_t matches[matches_.size()];
1952         auto value(regexec(&regex_, data.c_str(), matches_.size(), matches, 0));
1953         if (value == REG_NOMATCH)
1954             return false;
1955         _assert_(value == 0, "regexec()");
1956         for (size_t i(0); i != matches_.size(); ++i)
1957             matches_[i].assign(data.data() + matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so);
1958         return true;
1959     }
1960
1961     const std::string &operator [](size_t index) const {
1962         return matches_[index];
1963     }
1964 };
1965
1966 struct Rule {
1967     unsigned weight_;
1968     Mode mode_;
1969     std::string code_;
1970
1971     mutable std::auto_ptr<Expression> regex_;
1972
1973     Rule(unsigned weight, Mode mode, const std::string &code) :
1974         weight_(weight),
1975         mode_(mode),
1976         code_(code)
1977     {
1978     }
1979
1980     Rule(const Rule &rhs) :
1981         weight_(rhs.weight_),
1982         mode_(rhs.mode_),
1983         code_(rhs.code_)
1984     {
1985     }
1986
1987     void Compile() const {
1988         regex_.reset(new Expression(code_));
1989     }
1990
1991     bool operator ()(const std::string &data) const {
1992         _assert(regex_.get() != NULL);
1993         return (*regex_)(data);
1994     }
1995
1996     bool operator <(const Rule &rhs) const {
1997         if (weight_ > rhs.weight_)
1998             return true;
1999         if (weight_ < rhs.weight_)
2000             return false;
2001         return mode_ > rhs.mode_;
2002     }
2003 };
2004
2005 struct RuleCode {
2006     bool operator ()(const Rule *lhs, const Rule *rhs) const {
2007         return lhs->code_ < rhs->code_;
2008     }
2009 };
2010
2011 #ifndef LDID_NOPLIST
2012 static std::vector<char> 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) {
2013     // XXX: this is a miserable fail
2014     std::stringbuf temp;
2015     put(temp, prefix, size);
2016     copy(buffer, temp);
2017     auto data(temp.str());
2018
2019     HashProxy proxy(hash, save);
2020     return Sign(data.data(), data.size(), proxy, identifier, entitlements, requirement, key, slots);
2021 }
2022
2023 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, std::map<std::string, Hash> &remote, const std::string &entitlements, const std::string &requirement) {
2024     std::string executable;
2025     std::string identifier;
2026
2027     bool mac(false);
2028
2029     std::string info("Info.plist");
2030     if (!folder.Look(info) && folder.Look("Resources/" + info)) {
2031         mac = true;
2032         info = "Resources/" + info;
2033     }
2034
2035     folder.Open(info, fun([&](std::streambuf &buffer, const void *flag) {
2036         plist_d(buffer, fun([&](plist_t node) {
2037             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
2038             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
2039         }));
2040     }));
2041
2042     if (!mac && folder.Look("MacOS/" + executable)) {
2043         executable = "MacOS/" + executable;
2044         mac = true;
2045     }
2046
2047     static const std::string directory("_CodeSignature/");
2048     static const std::string signature(directory + "CodeResources");
2049
2050     std::map<std::string, std::multiset<Rule>> versions;
2051
2052     auto &rules1(versions[""]);
2053     auto &rules2(versions["2"]);
2054
2055     const std::string resources(mac ? "Resources/" : "");
2056
2057     if (true) {
2058         rules1.insert(Rule{1, NoMode, "^" + resources});
2059         if (!mac) rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2060         rules1.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2061         rules1.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2062         if (!mac) rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2063         rules1.insert(Rule{1, NoMode, "^version.plist$"});
2064     }
2065
2066     if (true) {
2067         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
2068         rules2.insert(Rule{20, NoMode, "^" + resources});
2069         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
2070         if (!mac) rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2071         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
2072         rules2.insert(Rule{1, NoMode, "^.*"});
2073         rules2.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2074         rules2.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2075         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
2076         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
2077         if (!mac) rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"});
2078         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
2079         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
2080         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
2081     }
2082
2083     std::map<std::string, Hash> local;
2084
2085     std::string failure(mac ? "Contents/|Versions/[^/]*/Resources/" : "");
2086     Expression nested("^(Frameworks/[^/]*\\.framework|PlugIns/[^/]*\\.appex(()|/[^/]*.app))/(" + failure + ")Info\\.plist$");
2087     std::map<std::string, Bundle> bundles;
2088
2089     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
2090         if (!nested(name))
2091             return;
2092         auto bundle(root + Split(name).dir);
2093         bundle.resize(bundle.size() - resources.size());
2094         SubFolder subfolder(folder, bundle);
2095         bundles[nested[1]] = Sign(bundle, subfolder, key, local, "", "");
2096     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2097     }));
2098
2099     std::set<std::string> excludes;
2100
2101     auto exclude([&](const std::string &name) {
2102         // BundleDiskRep::adjustResources -> builder.addExclusion
2103         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
2104             return true;
2105
2106         for (const auto &bundle : bundles)
2107             if (Starts(name, bundle.first + "/")) {
2108                 excludes.insert(name);
2109                 return true;
2110             }
2111
2112         return false;
2113     });
2114
2115     std::map<std::string, std::string> links;
2116
2117     folder.Find("", fun([&](const std::string &name, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &code) {
2118         if (exclude(name))
2119             return;
2120
2121         if (local.find(name) != local.end())
2122             return;
2123         auto &hash(local[name]);
2124
2125         code(fun([&](std::streambuf &data, std::streambuf &save) {
2126             union {
2127                 struct {
2128                     uint32_t magic;
2129                     uint32_t count;
2130                 };
2131
2132                 uint8_t bytes[8];
2133             } header;
2134
2135             auto size(most(data, &header.bytes, sizeof(header.bytes)));
2136
2137             if (name != "_WatchKitStub/WK" && size == sizeof(header.bytes))
2138                 switch (Swap(header.magic)) {
2139                     case FAT_MAGIC:
2140                         // Java class file format
2141                         if (Swap(header.count) >= 40)
2142                             break;
2143                     case FAT_CIGAM:
2144                     case MH_MAGIC: case MH_MAGIC_64:
2145                     case MH_CIGAM: case MH_CIGAM_64:
2146                         Slots slots;
2147                         Sign(header.bytes, size, data, hash, save, identifier, "", "", key, slots);
2148                         return;
2149                 }
2150
2151             HashProxy proxy(hash, save);
2152             put(proxy, header.bytes, size);
2153             copy(data, proxy);
2154         }));
2155     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2156         if (exclude(name))
2157             return;
2158
2159         links[name] = read();
2160     }));
2161
2162     auto plist(plist_new_dict());
2163     _scope({ plist_free(plist); });
2164
2165     for (const auto &version : versions) {
2166         auto files(plist_new_dict());
2167         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2168
2169         for (const auto &rule : version.second)
2170             rule.Compile();
2171
2172         bool old(&version.second == &rules1);
2173
2174         for (const auto &hash : local)
2175             for (const auto &rule : version.second)
2176                 if (rule(hash.first)) {
2177                     if (!old && mac && excludes.find(hash.first) != excludes.end());
2178                     else if (old && rule.mode_ == NoMode)
2179                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(hash.second.sha1_, sizeof(hash.second.sha1_)));
2180                     else if (rule.mode_ != OmitMode) {
2181                         auto entry(plist_new_dict());
2182                         plist_dict_set_item(entry, "hash", plist_new_data(hash.second.sha1_, sizeof(hash.second.sha1_)));
2183                         if (!old)
2184                             plist_dict_set_item(entry, "hash2", plist_new_data(hash.second.sha256_, sizeof(hash.second.sha256_)));
2185                         if (rule.mode_ == OptionalMode)
2186                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2187                         plist_dict_set_item(files, hash.first.c_str(), entry);
2188                     }
2189
2190                     break;
2191                 }
2192
2193         for (const auto &link : links)
2194             for (const auto &rule : version.second)
2195                 if (rule(link.first)) {
2196                     if (rule.mode_ != OmitMode) {
2197                         auto entry(plist_new_dict());
2198                         plist_dict_set_item(entry, "symlink", plist_new_string(link.second.c_str()));
2199                         if (rule.mode_ == OptionalMode)
2200                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2201                         plist_dict_set_item(files, link.first.c_str(), entry);
2202                     }
2203
2204                     break;
2205                 }
2206
2207         if (!old && mac)
2208             for (const auto &bundle : bundles) {
2209                 auto entry(plist_new_dict());
2210                 plist_dict_set_item(entry, "cdhash", plist_new_data(bundle.second.hash.data(), bundle.second.hash.size()));
2211                 plist_dict_set_item(entry, "requirement", plist_new_string("anchor apple generic"));
2212                 plist_dict_set_item(files, bundle.first.c_str(), entry);
2213             }
2214     }
2215
2216     for (const auto &version : versions) {
2217         auto rules(plist_new_dict());
2218         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2219
2220         std::multiset<const Rule *, RuleCode> ordered;
2221         for (const auto &rule : version.second)
2222             ordered.insert(&rule);
2223
2224         for (const auto &rule : ordered)
2225             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2226                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2227             else {
2228                 auto entry(plist_new_dict());
2229                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2230
2231                 switch (rule->mode_) {
2232                     case NoMode:
2233                         break;
2234                     case OmitMode:
2235                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2236                         break;
2237                     case OptionalMode:
2238                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2239                         break;
2240                     case NestedMode:
2241                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2242                         break;
2243                     case TopMode:
2244                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2245                         break;
2246                 }
2247
2248                 if (rule->weight_ >= 10000)
2249                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2250                 else if (rule->weight_ != 1)
2251                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2252             }
2253     }
2254
2255     folder.Save(signature, NULL, fun([&](std::streambuf &save) {
2256         HashProxy proxy(local[signature], save);
2257         char *xml(NULL);
2258         uint32_t size;
2259         plist_to_xml(plist, &xml, &size);
2260         _scope({ free(xml); });
2261         put(proxy, xml, size);
2262     }));
2263
2264     Bundle bundle;
2265     bundle.path = executable;
2266
2267     folder.Open(executable, fun([&](std::streambuf &buffer, const void *flag) {
2268         folder.Save(executable, flag, fun([&](std::streambuf &save) {
2269             Slots slots;
2270             slots[1] = local.at(info);
2271             slots[3] = local.at(signature);
2272             bundle.hash = Sign(NULL, 0, buffer, local[executable], save, identifier, entitlements, requirement, key, slots);
2273         }));
2274     }));
2275
2276     for (const auto &entry : local)
2277         remote[root + entry.first] = entry.second;
2278
2279     return bundle;
2280 }
2281
2282 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, const std::string &entitlements, const std::string &requirement) {
2283     std::map<std::string, Hash> local;
2284     return Sign(root, folder, key, local, entitlements, requirement);
2285 }
2286 #endif
2287
2288 #endif
2289 }
2290
2291 #ifndef LDID_NOTOOLS
2292 int main(int argc, char *argv[]) {
2293 #ifndef LDID_NOSMIME
2294     OpenSSL_add_all_algorithms();
2295 #endif
2296
2297     union {
2298         uint16_t word;
2299         uint8_t byte[2];
2300     } endian = {1};
2301
2302     little_ = endian.byte[0];
2303
2304     bool flag_r(false);
2305     bool flag_e(false);
2306     bool flag_q(false);
2307
2308 #ifndef LDID_NOFLAGT
2309     bool flag_T(false);
2310 #endif
2311
2312     bool flag_S(false);
2313     bool flag_s(false);
2314
2315     bool flag_D(false);
2316
2317     bool flag_A(false);
2318     bool flag_a(false);
2319
2320     bool flag_u(false);
2321
2322     uint32_t flag_CPUType(_not(uint32_t));
2323     uint32_t flag_CPUSubtype(_not(uint32_t));
2324
2325     const char *flag_I(NULL);
2326
2327 #ifndef LDID_NOFLAGT
2328     bool timeh(false);
2329     uint32_t timev(0);
2330 #endif
2331
2332     Map entitlements;
2333     Map requirement;
2334     Map key;
2335     ldid::Slots slots;
2336
2337     std::vector<std::string> files;
2338
2339     if (argc == 1) {
2340         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2341         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2342         fprintf(stderr, "   %s -S cat\n", argv[0]);
2343         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2344         exit(0);
2345     }
2346
2347     for (int argi(1); argi != argc; ++argi)
2348         if (argv[argi][0] != '-')
2349             files.push_back(argv[argi]);
2350         else switch (argv[argi][1]) {
2351             case 'r':
2352                 _assert(!flag_s);
2353                 _assert(!flag_S);
2354                 flag_r = true;
2355             break;
2356
2357             case 'e': flag_e = true; break;
2358
2359             case 'E': {
2360                 const char *slot = argv[argi] + 2;
2361                 const char *colon = strchr(slot, ':');
2362                 _assert(colon != NULL);
2363                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2364                 char *arge;
2365                 unsigned number(strtoul(slot, &arge, 0));
2366                 _assert(arge == colon);
2367                 sha1(slots[number], file.data(), file.size());
2368             } break;
2369
2370             case 'q': flag_q = true; break;
2371
2372             case 'Q': {
2373                 const char *xml = argv[argi] + 2;
2374                 requirement.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2375             } break;
2376
2377             case 'D': flag_D = true; break;
2378
2379             case 'a': flag_a = true; break;
2380
2381             case 'A':
2382                 _assert(!flag_A);
2383                 flag_A = true;
2384                 if (argv[argi][2] != '\0') {
2385                     const char *cpu = argv[argi] + 2;
2386                     const char *colon = strchr(cpu, ':');
2387                     _assert(colon != NULL);
2388                     char *arge;
2389                     flag_CPUType = strtoul(cpu, &arge, 0);
2390                     _assert(arge == colon);
2391                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2392                     _assert(arge == argv[argi] + strlen(argv[argi]));
2393                 }
2394             break;
2395
2396             case 's':
2397                 _assert(!flag_r);
2398                 _assert(!flag_S);
2399                 flag_s = true;
2400             break;
2401
2402             case 'S':
2403                 _assert(!flag_r);
2404                 _assert(!flag_s);
2405                 flag_S = true;
2406                 if (argv[argi][2] != '\0') {
2407                     const char *xml = argv[argi] + 2;
2408                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2409                 }
2410             break;
2411
2412             case 'K':
2413                 if (argv[argi][2] != '\0')
2414                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2415             break;
2416
2417 #ifndef LDID_NOFLAGT
2418             case 'T': {
2419                 flag_T = true;
2420                 if (argv[argi][2] == '-')
2421                     timeh = true;
2422                 else {
2423                     char *arge;
2424                     timev = strtoul(argv[argi] + 2, &arge, 0);
2425                     _assert(arge == argv[argi] + strlen(argv[argi]));
2426                 }
2427             } break;
2428 #endif
2429
2430             case 'u': {
2431                 flag_u = true;
2432             } break;
2433
2434             case 'I': {
2435                 flag_I = argv[argi] + 2;
2436             } break;
2437
2438             default:
2439                 goto usage;
2440             break;
2441         }
2442
2443     _assert(flag_S || key.empty());
2444     _assert(flag_S || flag_I == NULL);
2445
2446     if (files.empty()) usage: {
2447         exit(0);
2448     }
2449
2450     size_t filei(0), filee(0);
2451     _foreach (file, files) try {
2452         std::string path(file);
2453
2454         struct stat info;
2455         _syscall(stat(path.c_str(), &info));
2456
2457         if (S_ISDIR(info.st_mode)) {
2458 #ifndef LDID_NOPLIST
2459             _assert(!flag_r);
2460             ldid::DiskFolder folder(path);
2461             path += "/" + Sign("", folder, key, entitlements, requirement).path;
2462 #else
2463             _assert(false);
2464 #endif
2465         } else if (flag_S || flag_r) {
2466             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2467
2468             std::filebuf output;
2469             Split split(path);
2470             auto temp(Temporary(output, split));
2471
2472             if (flag_r)
2473                 ldid::Unsign(input.data(), input.size(), output);
2474             else {
2475                 std::string identifier(flag_I ?: split.base.c_str());
2476                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, requirement, key, slots);
2477             }
2478
2479             Commit(path, temp);
2480         }
2481
2482         bool modify(false);
2483 #ifndef LDID_NOFLAGT
2484         if (flag_T)
2485             modify = true;
2486 #endif
2487         if (flag_s)
2488             modify = true;
2489
2490         Map mapping(path, modify);
2491         FatHeader fat_header(mapping.data(), mapping.size());
2492
2493         _foreach (mach_header, fat_header.GetMachHeaders()) {
2494             struct linkedit_data_command *signature(NULL);
2495             struct encryption_info_command *encryption(NULL);
2496
2497             if (flag_A) {
2498                 if (mach_header.GetCPUType() != flag_CPUType)
2499                     continue;
2500                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2501                     continue;
2502             }
2503
2504             if (flag_a)
2505                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2506
2507             _foreach (load_command, mach_header.GetLoadCommands()) {
2508                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2509
2510                 if (false);
2511                 else if (cmd == LC_CODE_SIGNATURE)
2512                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2513                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2514                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2515                 else if (cmd == LC_LOAD_DYLIB) {
2516                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2517                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2518
2519                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2520                         if (flag_u) {
2521                             Version version;
2522                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2523                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2524                         }
2525                     }
2526                 }
2527 #ifndef LDID_NOFLAGT
2528                 else if (cmd == LC_ID_DYLIB) {
2529                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2530
2531                     if (flag_T) {
2532                         uint32_t timed;
2533
2534                         if (!timeh)
2535                             timed = timev;
2536                         else {
2537                             dylib_command->dylib.timestamp = 0;
2538                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2539                         }
2540
2541                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2542                     }
2543                 }
2544 #endif
2545             }
2546
2547             if (flag_D) {
2548                 _assert(encryption != NULL);
2549                 encryption->cryptid = mach_header.Swap(0);
2550             }
2551
2552             if (flag_e) {
2553                 _assert(signature != NULL);
2554
2555                 uint32_t data = mach_header.Swap(signature->dataoff);
2556
2557                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2558                 uint8_t *blob = top + data;
2559                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2560
2561                 for (size_t index(0); index != Swap(super->count); ++index)
2562                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2563                         uint32_t begin = Swap(super->index[index].offset);
2564                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2565                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2566                     }
2567             }
2568
2569             if (flag_q) {
2570                 _assert(signature != NULL);
2571
2572                 uint32_t data = mach_header.Swap(signature->dataoff);
2573
2574                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2575                 uint8_t *blob = top + data;
2576                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2577
2578                 for (size_t index(0); index != Swap(super->count); ++index)
2579                     if (Swap(super->index[index].type) == CSSLOT_REQUIREMENTS) {
2580                         uint32_t begin = Swap(super->index[index].offset);
2581                         struct Blob *requirement = reinterpret_cast<struct Blob *>(blob + begin);
2582                         fwrite(requirement, 1, Swap(requirement->length), stdout);
2583                     }
2584             }
2585
2586             if (flag_s) {
2587                 _assert(signature != NULL);
2588
2589                 uint32_t data = mach_header.Swap(signature->dataoff);
2590
2591                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2592                 uint8_t *blob = top + data;
2593                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2594
2595                 for (size_t index(0); index != Swap(super->count); ++index)
2596                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2597                         uint32_t begin = Swap(super->index[index].offset);
2598                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin + sizeof(Blob));
2599
2600                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
2601                         uint32_t pages = Swap(directory->nCodeSlots);
2602
2603                         if (pages != 1)
2604                             for (size_t i = 0; i != pages - 1; ++i)
2605                                 sha1(hashes[i], top + PageSize_ * i, PageSize_);
2606                         if (pages != 0)
2607                             sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1);
2608                     }
2609             }
2610         }
2611
2612         ++filei;
2613     } catch (const char *) {
2614         ++filee;
2615         ++filei;
2616     }
2617
2618     return filee;
2619 }
2620 #endif