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 #elif __APPLE__
  89 #include <CoreFoundation/CoreFoundation.h>
  90 #endif
  91
  92 #include "ldid.hpp"
  93
  94 #define _assert___(line) \
  95     #line
  96 #define _assert__(line) \
  97     _assert___(line)
  98
  99 #ifndef $
 100 #define $(value) value
 101 #endif
 102
 103 #ifdef __EXCEPTIONS
 104 #define _assert_(expr, format, ...) \
 105     do if (!(expr)) { \
 106         fprintf(stderr, $("%s(%u): _assert(): " format "\n"), __FILE__, __LINE__, ## __VA_ARGS__); \
 107         throw $(__FILE__ "(" _assert__(__LINE__) "): _assert(" #expr ")"); \
 108     } while (false)
 109 #else
 110 // XXX: this is not acceptable
 111 #define _assert_(expr, format, ...) \
 112     do if (!(expr)) { \
 113         fprintf(stderr, $("%s(%u): _assert(): " format "\n"), __FILE__, __LINE__, ## __VA_ARGS__); \
 114         exit(-1); \
 115     } while (false)
 116 #endif
 117
 118 #define _assert(expr) \
 119     _assert_(expr, "%s", $(#expr))
 120
 121 #define _syscall(expr, ...) [&] { for (;;) { \
 122     auto _value(expr); \
 123     if ((long) _value != -1) \
 124         return _value; \
 125     int error(errno); \
 126     if (error == EINTR) \
 127         continue; \
 128     /* XXX: EINTR is included in this list to fix g++ */ \
 129     for (auto success : (long[]) {EINTR, __VA_ARGS__}) \
 130         if (error == success) \
 131             return (decltype(expr)) -success; \
 132     _assert_(false, "errno=%u", error); \
 133 } }()
 134
 135 #define _trace() \
 136     fprintf(stderr, $("_trace(%s:%u): %s\n"), __FILE__, __LINE__, $(__FUNCTION__))
 137
 138 #define _not(type) \
 139     ((type) ~ (type) 0)
 140
 141 #define _packed \
 142     __attribute__((packed))
 143
 144 template <typename Type_>
 145 struct Iterator_ {
 146     typedef typename Type_::const_iterator Result;
 147 };
 148
 149 #define _foreach(item, list) \
 150     for (bool _stop(true); _stop; ) \
 151         for (const __typeof__(list) &_list = (list); _stop; _stop = false) \
 152             for (Iterator_<__typeof__(list)>::Result _item = _list.begin(); _item != _list.end(); ++_item) \
 153                 for (bool _suck(true); _suck; _suck = false) \
 154                     for (const __typeof__(*_item) &item = *_item; _suck; _suck = false)
 155
 156 class _Scope {
 157 };
 158
 159 template <typename Function_>
 160 class Scope :
 161     public _Scope
 162 {
 163   private:
 164     Function_ function_;
 165
 166   public:
 167     Scope(const Function_ &function) :
 168         function_(function)
 169     {
 170     }
 171
 172     ~Scope() {
 173         function_();
 174     }
 175 };
 176
 177 template <typename Function_>
 178 Scope<Function_> _scope(const Function_ &function) {
 179     return Scope<Function_>(function);
 180 }
 181
 182 #define _scope__(counter, function) \
 183     __attribute__((__unused__)) \
 184     const _Scope &_scope ## counter(_scope([&]function))
 185 #define _scope_(counter, function) \
 186     _scope__(counter, function)
 187 #define _scope(function) \
 188     _scope_(__COUNTER__, function)
 189
 190 #define CPU_ARCH_MASK  uint32_t(0xff000000)
 191 #define CPU_ARCH_ABI64 uint32_t(0x01000000)
 192
 193 #define CPU_TYPE_ANY     uint32_t(-1)
 194 #define CPU_TYPE_VAX     uint32_t( 1)
 195 #define CPU_TYPE_MC680x0 uint32_t( 6)
 196 #define CPU_TYPE_X86     uint32_t( 7)
 197 #define CPU_TYPE_MC98000 uint32_t(10)
 198 #define CPU_TYPE_HPPA    uint32_t(11)
 199 #define CPU_TYPE_ARM     uint32_t(12)
 200 #define CPU_TYPE_MC88000 uint32_t(13)
 201 #define CPU_TYPE_SPARC   uint32_t(14)
 202 #define CPU_TYPE_I860    uint32_t(15)
 203 #define CPU_TYPE_POWERPC uint32_t(18)
 204
 205 #define CPU_TYPE_I386 CPU_TYPE_X86
 206
 207 #define CPU_TYPE_ARM64     (CPU_ARCH_ABI64 | CPU_TYPE_ARM)
 208 #define CPU_TYPE_POWERPC64 (CPU_ARCH_ABI64 | CPU_TYPE_POWERPC)
 209 #define CPU_TYPE_X86_64    (CPU_ARCH_ABI64 | CPU_TYPE_X86)
 210
 211 struct fat_header {
 212     uint32_t magic;
 213     uint32_t nfat_arch;
 214 } _packed;
 215
 216 #define FAT_MAGIC 0xcafebabe
 217 #define FAT_CIGAM 0xbebafeca
 218
 219 struct fat_arch {
 220     uint32_t cputype;
 221     uint32_t cpusubtype;
 222     uint32_t offset;
 223     uint32_t size;
 224     uint32_t align;
 225 } _packed;
 226
 227 struct mach_header {
 228     uint32_t magic;
 229     uint32_t cputype;
 230     uint32_t cpusubtype;
 231     uint32_t filetype;
 232     uint32_t ncmds;
 233     uint32_t sizeofcmds;
 234     uint32_t flags;
 235 } _packed;
 236
 237 #define MH_MAGIC 0xfeedface
 238 #define MH_CIGAM 0xcefaedfe
 239
 240 #define MH_MAGIC_64 0xfeedfacf
 241 #define MH_CIGAM_64 0xcffaedfe
 242
 243 #define MH_DYLDLINK   0x4
 244
 245 #define MH_OBJECT     0x1
 246 #define MH_EXECUTE    0x2
 247 #define MH_DYLIB      0x6
 248 #define MH_BUNDLE     0x8
 249 #define MH_DYLIB_STUB 0x9
 250
 251 struct load_command {
 252     uint32_t cmd;
 253     uint32_t cmdsize;
 254 } _packed;
 255
 256 #define LC_REQ_DYLD           uint32_t(0x80000000)
 257
 258 #define LC_SEGMENT            uint32_t(0x01)
 259 #define LC_SYMTAB             uint32_t(0x02)
 260 #define LC_DYSYMTAB           uint32_t(0x0b)
 261 #define LC_LOAD_DYLIB         uint32_t(0x0c)
 262 #define LC_ID_DYLIB           uint32_t(0x0d)
 263 #define LC_SEGMENT_64         uint32_t(0x19)
 264 #define LC_UUID               uint32_t(0x1b)
 265 #define LC_CODE_SIGNATURE     uint32_t(0x1d)
 266 #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e)
 267 #define LC_REEXPORT_DYLIB     uint32_t(0x1f | LC_REQ_DYLD)
 268 #define LC_ENCRYPTION_INFO    uint32_t(0x21)
 269 #define LC_DYLD_INFO          uint32_t(0x22)
 270 #define LC_DYLD_INFO_ONLY     uint32_t(0x22 | LC_REQ_DYLD)
 271 #define LC_ENCRYPTION_INFO_64 uint32_t(0x2c)
 272
 273 union Version {
 274     struct {
 275         uint8_t patch;
 276         uint8_t minor;
 277         uint16_t major;
 278     } _packed;
 279
 280     uint32_t value;
 281 };
 282
 283 struct dylib {
 284     uint32_t name;
 285     uint32_t timestamp;
 286     uint32_t current_version;
 287     uint32_t compatibility_version;
 288 } _packed;
 289
 290 struct dylib_command {
 291     uint32_t cmd;
 292     uint32_t cmdsize;
 293     struct dylib dylib;
 294 } _packed;
 295
 296 struct uuid_command {
 297     uint32_t cmd;
 298     uint32_t cmdsize;
 299     uint8_t uuid[16];
 300 } _packed;
 301
 302 struct symtab_command {
 303     uint32_t cmd;
 304     uint32_t cmdsize;
 305     uint32_t symoff;
 306     uint32_t nsyms;
 307     uint32_t stroff;
 308     uint32_t strsize;
 309 } _packed;
 310
 311 struct dyld_info_command {
 312     uint32_t cmd;
 313     uint32_t cmdsize;
 314     uint32_t rebase_off;
 315     uint32_t rebase_size;
 316     uint32_t bind_off;
 317     uint32_t bind_size;
 318     uint32_t weak_bind_off;
 319     uint32_t weak_bind_size;
 320     uint32_t lazy_bind_off;
 321     uint32_t lazy_bind_size;
 322     uint32_t export_off;
 323     uint32_t export_size;
 324 } _packed;
 325
 326 struct dysymtab_command {
 327     uint32_t cmd;
 328     uint32_t cmdsize;
 329     uint32_t ilocalsym;
 330     uint32_t nlocalsym;
 331     uint32_t iextdefsym;
 332     uint32_t nextdefsym;
 333     uint32_t iundefsym;
 334     uint32_t nundefsym;
 335     uint32_t tocoff;
 336     uint32_t ntoc;
 337     uint32_t modtaboff;
 338     uint32_t nmodtab;
 339     uint32_t extrefsymoff;
 340     uint32_t nextrefsyms;
 341     uint32_t indirectsymoff;
 342     uint32_t nindirectsyms;
 343     uint32_t extreloff;
 344     uint32_t nextrel;
 345     uint32_t locreloff;
 346     uint32_t nlocrel;
 347 } _packed;
 348
 349 struct dylib_table_of_contents {
 350     uint32_t symbol_index;
 351     uint32_t module_index;
 352 } _packed;
 353
 354 struct dylib_module {
 355     uint32_t module_name;
 356     uint32_t iextdefsym;
 357     uint32_t nextdefsym;
 358     uint32_t irefsym;
 359     uint32_t nrefsym;
 360     uint32_t ilocalsym;
 361     uint32_t nlocalsym;
 362     uint32_t iextrel;
 363     uint32_t nextrel;
 364     uint32_t iinit_iterm;
 365     uint32_t ninit_nterm;
 366     uint32_t objc_module_info_addr;
 367     uint32_t objc_module_info_size;
 368 } _packed;
 369
 370 struct dylib_reference {
 371     uint32_t isym:24;
 372     uint32_t flags:8;
 373 } _packed;
 374
 375 struct relocation_info {
 376     int32_t r_address;
 377     uint32_t r_symbolnum:24;
 378     uint32_t r_pcrel:1;
 379     uint32_t r_length:2;
 380     uint32_t r_extern:1;
 381     uint32_t r_type:4;
 382 } _packed;
 383
 384 struct nlist {
 385     union {
 386         char *n_name;
 387         int32_t n_strx;
 388     } n_un;
 389
 390     uint8_t n_type;
 391     uint8_t n_sect;
 392     uint8_t n_desc;
 393     uint32_t n_value;
 394 } _packed;
 395
 396 struct segment_command {
 397     uint32_t cmd;
 398     uint32_t cmdsize;
 399     char segname[16];
 400     uint32_t vmaddr;
 401     uint32_t vmsize;
 402     uint32_t fileoff;
 403     uint32_t filesize;
 404     uint32_t maxprot;
 405     uint32_t initprot;
 406     uint32_t nsects;
 407     uint32_t flags;
 408 } _packed;
 409
 410 struct segment_command_64 {
 411     uint32_t cmd;
 412     uint32_t cmdsize;
 413     char segname[16];
 414     uint64_t vmaddr;
 415     uint64_t vmsize;
 416     uint64_t fileoff;
 417     uint64_t filesize;
 418     uint32_t maxprot;
 419     uint32_t initprot;
 420     uint32_t nsects;
 421     uint32_t flags;
 422 } _packed;
 423
 424 struct section {
 425     char sectname[16];
 426     char segname[16];
 427     uint32_t addr;
 428     uint32_t size;
 429     uint32_t offset;
 430     uint32_t align;
 431     uint32_t reloff;
 432     uint32_t nreloc;
 433     uint32_t flags;
 434     uint32_t reserved1;
 435     uint32_t reserved2;
 436 } _packed;
 437
 438 struct section_64 {
 439     char sectname[16];
 440     char segname[16];
 441     uint64_t addr;
 442     uint64_t size;
 443     uint32_t offset;
 444     uint32_t align;
 445     uint32_t reloff;
 446     uint32_t nreloc;
 447     uint32_t flags;
 448     uint32_t reserved1;
 449     uint32_t reserved2;
 450     uint32_t reserved3;
 451 } _packed;
 452
 453 struct linkedit_data_command {
 454     uint32_t cmd;
 455     uint32_t cmdsize;
 456     uint32_t dataoff;
 457     uint32_t datasize;
 458 } _packed;
 459
 460 struct encryption_info_command {
 461     uint32_t cmd;
 462     uint32_t cmdsize;
 463     uint32_t cryptoff;
 464     uint32_t cryptsize;
 465     uint32_t cryptid;
 466 } _packed;
 467
 468 #define BIND_OPCODE_MASK                             0xf0
 469 #define BIND_IMMEDIATE_MASK                          0x0f
 470 #define BIND_OPCODE_DONE                             0x00
 471 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM            0x10
 472 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB           0x20
 473 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM            0x30
 474 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM    0x40
 475 #define BIND_OPCODE_SET_TYPE_IMM                     0x50
 476 #define BIND_OPCODE_SET_ADDEND_SLEB                  0x60
 477 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB      0x70
 478 #define BIND_OPCODE_ADD_ADDR_ULEB                    0x80
 479 #define BIND_OPCODE_DO_BIND                          0x90
 480 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB            0xa0
 481 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED      0xb0
 482 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0
 483
 484 struct : ldid::Progress {
 485     virtual void operator()(const std::string &value) const {
 486     }
 487
 488     virtual void operator()(double value) const {
 489     }
 490 } dummy_;
 491
 492 struct Progression : ldid::Progress {
 493     const ldid::Progress &progress_;
 494     std::string name_;
 495
 496     Progression(const ldid::Progress &progress, const std::string &name) :
 497         progress_(progress),
 498         name_(name)
 499     {
 500     }
 501
 502     virtual void operator()(const std::string &value) const {
 503         return progress_(name_ + " (" + value + ")");
 504     }
 505
 506     virtual void operator()(double value) const {
 507         return progress_(value);
 508     }
 509 };
 510
 511 static std::streamsize read(std::streambuf &stream, void *data, size_t size) {
 512     auto writ(stream.sgetn(static_cast<char *>(data), size));
 513     _assert(writ >= 0);
 514     return writ;
 515 }
 516
 517 static inline void get(std::streambuf &stream, void *data, size_t size) {
 518     _assert(read(stream, data, size) == size);
 519 }
 520
 521 static inline void put(std::streambuf &stream, const void *data, size_t size) {
 522     _assert(stream.sputn(static_cast<const char *>(data), size) == size);
 523 }
 524
 525 static inline void put(std::streambuf &stream, const void *data, size_t size, const ldid::Progress &progress) {
 526     progress(0);
 527     for (size_t total(0); total != size;) {
 528         auto writ(std::min(size - total, size_t(4096 * 4)));
 529         _assert(stream.sputn(static_cast<const char *>(data) + total, writ) == writ);
 530         total += writ;
 531         progress(double(total) / size);
 532     }
 533 }
 534
 535 static size_t most(std::streambuf &stream, void *data, size_t size) {
 536     size_t total(size);
 537     while (size > 0)
 538         if (auto writ = read(stream, data, size))
 539             size -= writ;
 540         else break;
 541     return total - size;
 542 }
 543
 544 static inline void pad(std::streambuf &stream, size_t size) {
 545     char padding[size];
 546     memset(padding, 0, size);
 547     put(stream, padding, size);
 548 }
 549
 550 template <typename Type_>
 551 Type_ Align(Type_ value, size_t align) {
 552     value += align - 1;
 553     value /= align;
 554     value *= align;
 555     return value;
 556 }
 557
 558 static const uint8_t PageShift_(0x0c);
 559 static const uint32_t PageSize_(1 << PageShift_);
 560
 561 static inline uint16_t Swap_(uint16_t value) {
 562     return
 563         ((value >>  8) & 0x00ff) |
 564         ((value <<  8) & 0xff00);
 565 }
 566
 567 static inline uint32_t Swap_(uint32_t value) {
 568     value = ((value >>  8) & 0x00ff00ff) |
 569             ((value <<  8) & 0xff00ff00);
 570     value = ((value >> 16) & 0x0000ffff) |
 571             ((value << 16) & 0xffff0000);
 572     return value;
 573 }
 574
 575 static inline uint64_t Swap_(uint64_t value) {
 576     value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
 577     value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
 578     value = (value & 0x00ff00ff00ff00ff) << 8  | (value & 0xff00ff00ff00ff00) >> 8;
 579     return value;
 580 }
 581
 582 static inline int16_t Swap_(int16_t value) {
 583     return Swap_(static_cast<uint16_t>(value));
 584 }
 585
 586 static inline int32_t Swap_(int32_t value) {
 587     return Swap_(static_cast<uint32_t>(value));
 588 }
 589
 590 static inline int64_t Swap_(int64_t value) {
 591     return Swap_(static_cast<uint64_t>(value));
 592 }
 593
 594 static bool little_(true);
 595
 596 static inline uint16_t Swap(uint16_t value) {
 597     return little_ ? Swap_(value) : value;
 598 }
 599
 600 static inline uint32_t Swap(uint32_t value) {
 601     return little_ ? Swap_(value) : value;
 602 }
 603
 604 static inline uint64_t Swap(uint64_t value) {
 605     return little_ ? Swap_(value) : value;
 606 }
 607
 608 static inline int16_t Swap(int16_t value) {
 609     return Swap(static_cast<uint16_t>(value));
 610 }
 611
 612 static inline int32_t Swap(int32_t value) {
 613     return Swap(static_cast<uint32_t>(value));
 614 }
 615
 616 static inline int64_t Swap(int64_t value) {
 617     return Swap(static_cast<uint64_t>(value));
 618 }
 619
 620 class Swapped {
 621   protected:
 622     bool swapped_;
 623
 624     Swapped() :
 625         swapped_(false)
 626     {
 627     }
 628
 629   public:
 630     Swapped(bool swapped) :
 631         swapped_(swapped)
 632     {
 633     }
 634
 635     template <typename Type_>
 636     Type_ Swap(Type_ value) const {
 637         return swapped_ ? Swap_(value) : value;
 638     }
 639 };
 640
 641 class Data :
 642     public Swapped
 643 {
 644   private:
 645     void *base_;
 646     size_t size_;
 647
 648   public:
 649     Data(void *base, size_t size) :
 650         base_(base),
 651         size_(size)
 652     {
 653     }
 654
 655     void *GetBase() const {
 656         return base_;
 657     }
 658
 659     size_t GetSize() const {
 660         return size_;
 661     }
 662 };
 663
 664 class MachHeader :
 665     public Data
 666 {
 667   private:
 668     bool bits64_;
 669
 670     struct mach_header *mach_header_;
 671     struct load_command *load_command_;
 672
 673   public:
 674     MachHeader(void *base, size_t size) :
 675         Data(base, size)
 676     {
 677         mach_header_ = (mach_header *) base;
 678
 679         switch (Swap(mach_header_->magic)) {
 680             case MH_CIGAM:
 681                 swapped_ = !swapped_;
 682             case MH_MAGIC:
 683                 bits64_ = false;
 684             break;
 685
 686             case MH_CIGAM_64:
 687                 swapped_ = !swapped_;
 688             case MH_MAGIC_64:
 689                 bits64_ = true;
 690             break;
 691
 692             default:
 693                 _assert(false);
 694         }
 695
 696         void *post = mach_header_ + 1;
 697         if (bits64_)
 698             post = (uint32_t *) post + 1;
 699         load_command_ = (struct load_command *) post;
 700
 701         _assert(
 702             Swap(mach_header_->filetype) == MH_EXECUTE ||
 703             Swap(mach_header_->filetype) == MH_DYLIB ||
 704             Swap(mach_header_->filetype) == MH_BUNDLE
 705         );
 706     }
 707
 708     bool Bits64() const {
 709         return bits64_;
 710     }
 711
 712     struct mach_header *operator ->() const {
 713         return mach_header_;
 714     }
 715
 716     operator struct mach_header *() const {
 717         return mach_header_;
 718     }
 719
 720     uint32_t GetCPUType() const {
 721         return Swap(mach_header_->cputype);
 722     }
 723
 724     uint32_t GetCPUSubtype() const {
 725         return Swap(mach_header_->cpusubtype) & 0xff;
 726     }
 727
 728     struct load_command *GetLoadCommand() const {
 729         return load_command_;
 730     }
 731
 732     std::vector<struct load_command *> GetLoadCommands() const {
 733         std::vector<struct load_command *> load_commands;
 734
 735         struct load_command *load_command = load_command_;
 736         for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) {
 737             load_commands.push_back(load_command);
 738             load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize));
 739         }
 740
 741         return load_commands;
 742     }
 743
 744     void ForSection(const ldid::Functor<void (const char *, const char *, void *, size_t)> &code) const {
 745         _foreach (load_command, GetLoadCommands())
 746             switch (Swap(load_command->cmd)) {
 747                 case LC_SEGMENT: {
 748                     auto segment(reinterpret_cast<struct segment_command *>(load_command));
 749                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 750                     auto section(reinterpret_cast<struct section *>(segment + 1));
 751                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 752                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 753                 } break;
 754
 755                 case LC_SEGMENT_64: {
 756                     auto segment(reinterpret_cast<struct segment_command_64 *>(load_command));
 757                     code(segment->segname, NULL, GetOffset<void>(segment->fileoff), segment->filesize);
 758                     auto section(reinterpret_cast<struct section_64 *>(segment + 1));
 759                     for (uint32_t i(0), e(Swap(segment->nsects)); i != e; ++i, ++section)
 760                         code(segment->segname, section->sectname, GetOffset<void>(segment->fileoff + section->offset), section->size);
 761                 } break;
 762             }
 763     }
 764
 765     template <typename Target_>
 766     Target_ *GetOffset(uint32_t offset) const {
 767         return reinterpret_cast<Target_ *>(offset + (uint8_t *) mach_header_);
 768     }
 769 };
 770
 771 class FatMachHeader :
 772     public MachHeader
 773 {
 774   private:
 775     fat_arch *fat_arch_;
 776
 777   public:
 778     FatMachHeader(void *base, size_t size, fat_arch *fat_arch) :
 779         MachHeader(base, size),
 780         fat_arch_(fat_arch)
 781     {
 782     }
 783
 784     fat_arch *GetFatArch() const {
 785         return fat_arch_;
 786     }
 787 };
 788
 789 class FatHeader :
 790     public Data
 791 {
 792   private:
 793     fat_header *fat_header_;
 794     std::vector<FatMachHeader> mach_headers_;
 795
 796   public:
 797     FatHeader(void *base, size_t size) :
 798         Data(base, size)
 799     {
 800         fat_header_ = reinterpret_cast<struct fat_header *>(base);
 801
 802         if (Swap(fat_header_->magic) == FAT_CIGAM) {
 803             swapped_ = !swapped_;
 804             goto fat;
 805         } else if (Swap(fat_header_->magic) != FAT_MAGIC) {
 806             fat_header_ = NULL;
 807             mach_headers_.push_back(FatMachHeader(base, size, NULL));
 808         } else fat: {
 809             size_t fat_narch = Swap(fat_header_->nfat_arch);
 810             fat_arch *fat_arch = reinterpret_cast<struct fat_arch *>(fat_header_ + 1);
 811             size_t arch;
 812             for (arch = 0; arch != fat_narch; ++arch) {
 813                 uint32_t arch_offset = Swap(fat_arch->offset);
 814                 uint32_t arch_size = Swap(fat_arch->size);
 815                 mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch));
 816                 ++fat_arch;
 817             }
 818         }
 819     }
 820
 821     std::vector<FatMachHeader> &GetMachHeaders() {
 822         return mach_headers_;
 823     }
 824
 825     bool IsFat() const {
 826         return fat_header_ != NULL;
 827     }
 828
 829     struct fat_header *operator ->() const {
 830         return fat_header_;
 831     }
 832
 833     operator struct fat_header *() const {
 834         return fat_header_;
 835     }
 836 };
 837
 838 #define CSMAGIC_REQUIREMENT            uint32_t(0xfade0c00)
 839 #define CSMAGIC_REQUIREMENTS           uint32_t(0xfade0c01)
 840 #define CSMAGIC_CODEDIRECTORY          uint32_t(0xfade0c02)
 841 #define CSMAGIC_EMBEDDED_SIGNATURE     uint32_t(0xfade0cc0)
 842 #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02)
 843 #define CSMAGIC_EMBEDDED_ENTITLEMENTS  uint32_t(0xfade7171)
 844 #define CSMAGIC_DETACHED_SIGNATURE     uint32_t(0xfade0cc1)
 845 #define CSMAGIC_BLOBWRAPPER            uint32_t(0xfade0b01)
 846
 847 #define CSSLOT_CODEDIRECTORY uint32_t(0x00000)
 848 #define CSSLOT_INFOSLOT      uint32_t(0x00001)
 849 #define CSSLOT_REQUIREMENTS  uint32_t(0x00002)
 850 #define CSSLOT_RESOURCEDIR   uint32_t(0x00003)
 851 #define CSSLOT_APPLICATION   uint32_t(0x00004)
 852 #define CSSLOT_ENTITLEMENTS  uint32_t(0x00005)
 853 #define CSSLOT_ALTERNATE     uint32_t(0x01000)
 854
 855 #define CSSLOT_SIGNATURESLOT uint32_t(0x10000)
 856
 857 #define CS_HASHTYPE_SHA160_160 1
 858 #define CS_HASHTYPE_SHA256_256 2
 859 #define CS_HASHTYPE_SHA256_160 3
 860 #define CS_HASHTYPE_SHA386_386 4
 861
 862 struct BlobIndex {
 863     uint32_t type;
 864     uint32_t offset;
 865 } _packed;
 866
 867 struct Blob {
 868     uint32_t magic;
 869     uint32_t length;
 870 } _packed;
 871
 872 struct SuperBlob {
 873     struct Blob blob;
 874     uint32_t count;
 875     struct BlobIndex index[];
 876 } _packed;
 877
 878 struct CodeDirectory {
 879     uint32_t version;
 880     uint32_t flags;
 881     uint32_t hashOffset;
 882     uint32_t identOffset;
 883     uint32_t nSpecialSlots;
 884     uint32_t nCodeSlots;
 885     uint32_t codeLimit;
 886     uint8_t hashSize;
 887     uint8_t hashType;
 888     uint8_t spare1;
 889     uint8_t pageSize;
 890     uint32_t spare2;
 891     uint32_t scatterOffset;
 892     uint32_t teamIDOffset;
 893     //uint32_t spare3;
 894     //uint64_t codeLimit64;
 895 } _packed;
 896
 897 enum Kind : uint32_t {
 898     exprForm = 1, // prefix expr form
 899 };
 900
 901 enum ExprOp : uint32_t {
 902     opFalse, // unconditionally false
 903     opTrue, // unconditionally true
 904     opIdent, // match canonical code [string]
 905     opAppleAnchor, // signed by Apple as Apple's product
 906     opAnchorHash, // match anchor [cert hash]
 907     opInfoKeyValue, // *legacy* - use opInfoKeyField [key; value]
 908     opAnd, // binary prefix expr AND expr [expr; expr]
 909     opOr, // binary prefix expr OR expr [expr; expr]
 910     opCDHash, // match hash of CodeDirectory directly [cd hash]
 911     opNot, // logical inverse [expr]
 912     opInfoKeyField, // Info.plist key field [string; match suffix]
 913     opCertField, // Certificate field [cert index; field name; match suffix]
 914     opTrustedCert, // require trust settings to approve one particular cert [cert index]
 915     opTrustedCerts, // require trust settings to approve the cert chain
 916     opCertGeneric, // Certificate component by OID [cert index; oid; match suffix]
 917     opAppleGenericAnchor, // signed by Apple in any capacity
 918     opEntitlementField, // entitlement dictionary field [string; match suffix]
 919     opCertPolicy, // Certificate policy by OID [cert index; oid; match suffix]
 920     opNamedAnchor, // named anchor type
 921     opNamedCode, // named subroutine
 922     opPlatform, // platform constraint [integer]
 923     exprOpCount // (total opcode count in use)
 924 };
 925
 926 enum MatchOperation {
 927     matchExists, // anything but explicit "false" - no value stored
 928     matchEqual, // equal (CFEqual)
 929     matchContains, // partial match (substring)
 930     matchBeginsWith, // partial match (initial substring)
 931     matchEndsWith, // partial match (terminal substring)
 932     matchLessThan, // less than (string with numeric comparison)
 933     matchGreaterThan, // greater than (string with numeric comparison)
 934     matchLessEqual, // less or equal (string with numeric comparison)
 935     matchGreaterEqual, // greater or equal (string with numeric comparison)
 936 };
 937
 938 #define OID_ISO_MEMBER 42
 939 #define OID_US OID_ISO_MEMBER, 134, 72
 940 #define APPLE_OID OID_US, 0x86, 0xf7, 0x63
 941 #define APPLE_ADS_OID APPLE_OID, 0x64
 942 #define APPLE_EXTENSION_OID APPLE_ADS_OID, 6
 943
 944 #ifndef LDID_NOFLAGT
 945 extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
 946 #endif
 947
 948 struct Algorithm {
 949     size_t size_;
 950     uint8_t type_;
 951
 952     Algorithm(size_t size, uint8_t type) :
 953         size_(size),
 954         type_(type)
 955     {
 956     }
 957
 958     virtual const uint8_t *operator [](const ldid::Hash &hash) const = 0;
 959
 960     virtual void operator ()(uint8_t *hash, const void *data, size_t size) const = 0;
 961     virtual void operator ()(ldid::Hash &hash, const void *data, size_t size) const = 0;
 962     virtual void operator ()(std::vector<char> &hash, const void *data, size_t size) const = 0;
 963
 964     virtual const char *name() = 0;
 965 };
 966
 967 struct AlgorithmSHA1 :
 968     Algorithm
 969 {
 970     AlgorithmSHA1() :
 971         Algorithm(LDID_SHA1_DIGEST_LENGTH, CS_HASHTYPE_SHA160_160)
 972     {
 973     }
 974
 975     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
 976         return hash.sha1_;
 977     }
 978
 979     void operator ()(uint8_t *hash, const void *data, size_t size) const {
 980         LDID_SHA1(static_cast<const uint8_t *>(data), size, hash);
 981     }
 982
 983     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
 984         return operator()(hash.sha1_, data, size);
 985     }
 986
 987     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
 988         hash.resize(LDID_SHA1_DIGEST_LENGTH);
 989         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
 990     }
 991
 992     virtual const char *name() {
 993         return "sha1";
 994     }
 995 };
 996
 997 struct AlgorithmSHA256 :
 998     Algorithm
 999 {
1000     AlgorithmSHA256() :
1001         Algorithm(LDID_SHA256_DIGEST_LENGTH, CS_HASHTYPE_SHA256_256)
1002     {
1003     }
1004
1005     virtual const uint8_t *operator [](const ldid::Hash &hash) const {
1006         return hash.sha256_;
1007     }
1008
1009     void operator ()(uint8_t *hash, const void *data, size_t size) const {
1010         LDID_SHA256(static_cast<const uint8_t *>(data), size, hash);
1011     }
1012
1013     void operator ()(ldid::Hash &hash, const void *data, size_t size) const {
1014         return operator()(hash.sha256_, data, size);
1015     }
1016
1017     void operator ()(std::vector<char> &hash, const void *data, size_t size) const {
1018         hash.resize(LDID_SHA256_DIGEST_LENGTH);
1019         return operator ()(reinterpret_cast<uint8_t *>(hash.data()), data, size);
1020     }
1021
1022     virtual const char *name() {
1023         return "sha256";
1024     }
1025 };
1026
1027 static const std::vector<Algorithm *> &GetAlgorithms() {
1028     static AlgorithmSHA1 sha1;
1029     static AlgorithmSHA256 sha256;
1030
1031     static Algorithm *array[] = {
1032         &sha1,
1033         &sha256,
1034     };
1035
1036     static std::vector<Algorithm *> algorithms(array, array + sizeof(array) / sizeof(array[0]));
1037     return algorithms;
1038 }
1039
1040 struct CodesignAllocation {
1041     FatMachHeader mach_header_;
1042     uint32_t offset_;
1043     uint32_t size_;
1044     uint32_t limit_;
1045     uint32_t alloc_;
1046     uint32_t align_;
1047     const char *arch_;
1048
1049     CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align, const char *arch) :
1050         mach_header_(mach_header),
1051         offset_(offset),
1052         size_(size),
1053         limit_(limit),
1054         alloc_(alloc),
1055         align_(align),
1056         arch_(arch)
1057     {
1058     }
1059 };
1060
1061 #ifndef LDID_NOTOOLS
1062 class File {
1063   private:
1064     int file_;
1065
1066   public:
1067     File() :
1068         file_(-1)
1069     {
1070     }
1071
1072     ~File() {
1073         if (file_ != -1)
1074             _syscall(close(file_));
1075     }
1076
1077     void open(const char *path, int flags) {
1078         _assert(file_ == -1);
1079         file_ = _syscall(::open(path, flags));
1080     }
1081
1082     int file() const {
1083         return file_;
1084     }
1085 };
1086
1087 class Map {
1088   private:
1089     File file_;
1090     void *data_;
1091     size_t size_;
1092
1093     void clear() {
1094         if (data_ == NULL)
1095             return;
1096         _syscall(munmap(data_, size_));
1097         data_ = NULL;
1098         size_ = 0;
1099     }
1100
1101   public:
1102     Map() :
1103         data_(NULL),
1104         size_(0)
1105     {
1106     }
1107
1108     Map(const std::string &path, int oflag, int pflag, int mflag) :
1109         Map()
1110     {
1111         open(path, oflag, pflag, mflag);
1112     }
1113
1114     Map(const std::string &path, bool edit) :
1115         Map()
1116     {
1117         open(path, edit);
1118     }
1119
1120     ~Map() {
1121         clear();
1122     }
1123
1124     bool empty() const {
1125         return data_ == NULL;
1126     }
1127
1128     void open(const std::string &path, int oflag, int pflag, int mflag) {
1129         clear();
1130
1131         file_.open(path.c_str(), oflag);
1132         int file(file_.file());
1133
1134         struct stat stat;
1135         _syscall(fstat(file, &stat));
1136         size_ = stat.st_size;
1137
1138         data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
1139     }
1140
1141     void open(const std::string &path, bool edit) {
1142         if (edit)
1143             open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
1144         else
1145             open(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
1146     }
1147
1148     void *data() const {
1149         return data_;
1150     }
1151
1152     size_t size() const {
1153         return size_;
1154     }
1155
1156     operator std::string() const {
1157         return std::string(static_cast<char *>(data_), size_);
1158     }
1159 };
1160 #endif
1161
1162 namespace ldid {
1163
1164 std::string Analyze(const void *data, size_t size) {
1165     std::string entitlements;
1166
1167     FatHeader fat_header(const_cast<void *>(data), size);
1168     _foreach (mach_header, fat_header.GetMachHeaders())
1169         _foreach (load_command, mach_header.GetLoadCommands())
1170             if (mach_header.Swap(load_command->cmd) == LC_CODE_SIGNATURE) {
1171                 auto signature(reinterpret_cast<struct linkedit_data_command *>(load_command));
1172                 auto offset(mach_header.Swap(signature->dataoff));
1173                 auto pointer(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + offset);
1174                 auto super(reinterpret_cast<struct SuperBlob *>(pointer));
1175
1176                 for (size_t index(0); index != Swap(super->count); ++index)
1177                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
1178                         auto begin(Swap(super->index[index].offset));
1179                         auto blob(reinterpret_cast<struct Blob *>(pointer + begin));
1180                         auto writ(Swap(blob->length) - sizeof(*blob));
1181
1182                         if (entitlements.empty())
1183                             entitlements.assign(reinterpret_cast<char *>(blob + 1), writ);
1184                         else
1185                             _assert(entitlements.compare(0, entitlements.size(), reinterpret_cast<char *>(blob + 1), writ) == 0);
1186                     }
1187             }
1188
1189     return entitlements;
1190 }
1191
1192 static void Allocate(const void *idata, size_t isize, std::streambuf &output, const Functor<size_t (const MachHeader &, size_t)> &allocate, const Functor<size_t (const MachHeader &, std::streambuf &output, size_t, const std::string &, const char *, const Progress &)> &save, const Progress &progress) {
1193     FatHeader source(const_cast<void *>(idata), isize);
1194
1195     size_t offset(0);
1196     if (source.IsFat())
1197         offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch);
1198
1199     std::vector<CodesignAllocation> allocations;
1200     _foreach (mach_header, source.GetMachHeaders()) {
1201         struct linkedit_data_command *signature(NULL);
1202         struct symtab_command *symtab(NULL);
1203
1204         _foreach (load_command, mach_header.GetLoadCommands()) {
1205             uint32_t cmd(mach_header.Swap(load_command->cmd));
1206             if (false);
1207             else if (cmd == LC_CODE_SIGNATURE)
1208                 signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
1209             else if (cmd == LC_SYMTAB)
1210                 symtab = reinterpret_cast<struct symtab_command *>(load_command);
1211         }
1212
1213         size_t size;
1214         if (signature == NULL)
1215             size = mach_header.GetSize();
1216         else {
1217             size = mach_header.Swap(signature->dataoff);
1218             _assert(size <= mach_header.GetSize());
1219         }
1220
1221         if (symtab != NULL) {
1222             auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize));
1223             if (symtab->stroff != 0 || symtab->strsize != 0) {
1224                 _assert(end <= size);
1225                 _assert(end >= size - 0x10);
1226                 size = end;
1227             }
1228         }
1229
1230         size_t alloc(allocate(mach_header, size));
1231
1232         auto *fat_arch(mach_header.GetFatArch());
1233         uint32_t align;
1234
1235         if (fat_arch != NULL)
1236             align = source.Swap(fat_arch->align);
1237         else switch (mach_header.GetCPUType()) {
1238             case CPU_TYPE_POWERPC:
1239             case CPU_TYPE_POWERPC64:
1240             case CPU_TYPE_X86:
1241             case CPU_TYPE_X86_64:
1242                 align = 0xc;
1243                 break;
1244             case CPU_TYPE_ARM:
1245             case CPU_TYPE_ARM64:
1246                 align = 0xe;
1247                 break;
1248             default:
1249                 align = 0x0;
1250                 break;
1251         }
1252
1253         const char *arch(NULL);
1254         switch (mach_header.GetCPUType()) {
1255             case CPU_TYPE_POWERPC:
1256                 arch = "ppc";
1257                 break;
1258             case CPU_TYPE_POWERPC64:
1259                 arch = "ppc64";
1260                 break;
1261             case CPU_TYPE_X86:
1262                 arch = "i386";
1263                 break;
1264             case CPU_TYPE_X86_64:
1265                 arch = "x86_64";
1266                 break;
1267             case CPU_TYPE_ARM:
1268                 arch = "arm";
1269                 break;
1270             case CPU_TYPE_ARM64:
1271                 arch = "arm64";
1272                 break;
1273         }
1274
1275         offset = Align(offset, 1 << align);
1276
1277         uint32_t limit(size);
1278         if (alloc != 0)
1279             limit = Align(limit, 0x10);
1280
1281         allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align, arch));
1282         offset += size + alloc;
1283         offset = Align(offset, 0x10);
1284     }
1285
1286     size_t position(0);
1287
1288     if (source.IsFat()) {
1289         fat_header fat_header;
1290         fat_header.magic = Swap(FAT_MAGIC);
1291         fat_header.nfat_arch = Swap(uint32_t(allocations.size()));
1292         put(output, &fat_header, sizeof(fat_header));
1293         position += sizeof(fat_header);
1294
1295         _foreach (allocation, allocations) {
1296             auto &mach_header(allocation.mach_header_);
1297
1298             fat_arch fat_arch;
1299             fat_arch.cputype = Swap(mach_header->cputype);
1300             fat_arch.cpusubtype = Swap(mach_header->cpusubtype);
1301             fat_arch.offset = Swap(allocation.offset_);
1302             fat_arch.size = Swap(allocation.limit_ + allocation.alloc_);
1303             fat_arch.align = Swap(allocation.align_);
1304             put(output, &fat_arch, sizeof(fat_arch));
1305             position += sizeof(fat_arch);
1306         }
1307     }
1308
1309     _foreach (allocation, allocations) {
1310         progress(allocation.arch_);
1311         auto &mach_header(allocation.mach_header_);
1312
1313         pad(output, allocation.offset_ - position);
1314         position = allocation.offset_;
1315
1316         std::vector<std::string> commands;
1317
1318         _foreach (load_command, mach_header.GetLoadCommands()) {
1319             std::string copy(reinterpret_cast<const char *>(load_command), load_command->cmdsize);
1320
1321             switch (mach_header.Swap(load_command->cmd)) {
1322                 case LC_CODE_SIGNATURE:
1323                     continue;
1324                 break;
1325
1326                 case LC_SEGMENT: {
1327                     auto segment_command(reinterpret_cast<struct segment_command *>(&copy[0]));
1328                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1329                         break;
1330                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1331                     segment_command->filesize = size;
1332                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1333                 } break;
1334
1335                 case LC_SEGMENT_64: {
1336                     auto segment_command(reinterpret_cast<struct segment_command_64 *>(&copy[0]));
1337                     if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0)
1338                         break;
1339                     size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff)));
1340                     segment_command->filesize = size;
1341                     segment_command->vmsize = Align(size, 1 << allocation.align_);
1342                 } break;
1343             }
1344
1345             commands.push_back(copy);
1346         }
1347
1348         if (allocation.alloc_ != 0) {
1349             linkedit_data_command signature;
1350             signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE);
1351             signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature)));
1352             signature.dataoff = mach_header.Swap(allocation.limit_);
1353             signature.datasize = mach_header.Swap(allocation.alloc_);
1354             commands.push_back(std::string(reinterpret_cast<const char *>(&signature), sizeof(signature)));
1355         }
1356
1357         size_t begin(position);
1358
1359         uint32_t after(0);
1360         _foreach(command, commands)
1361             after += command.size();
1362
1363         std::stringbuf altern;
1364
1365         struct mach_header header(*mach_header);
1366         header.ncmds = mach_header.Swap(uint32_t(commands.size()));
1367         header.sizeofcmds = mach_header.Swap(after);
1368         put(output, &header, sizeof(header));
1369         put(altern, &header, sizeof(header));
1370         position += sizeof(header);
1371
1372         if (mach_header.Bits64()) {
1373             auto pad(mach_header.Swap(uint32_t(0)));
1374             put(output, &pad, sizeof(pad));
1375             put(altern, &pad, sizeof(pad));
1376             position += sizeof(pad);
1377         }
1378
1379         _foreach(command, commands) {
1380             put(output, command.data(), command.size());
1381             put(altern, command.data(), command.size());
1382             position += command.size();
1383         }
1384
1385         uint32_t before(mach_header.Swap(mach_header->sizeofcmds));
1386         if (before > after) {
1387             pad(output, before - after);
1388             pad(altern, before - after);
1389             position += before - after;
1390         }
1391
1392         auto top(reinterpret_cast<char *>(mach_header.GetBase()));
1393
1394         std::string overlap(altern.str());
1395         overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size());
1396
1397         put(output, top + (position - begin), allocation.size_ - (position - begin), progress);
1398         position = begin + allocation.size_;
1399
1400         pad(output, allocation.limit_ - allocation.size_);
1401         position += allocation.limit_ - allocation.size_;
1402
1403         size_t saved(save(mach_header, output, allocation.limit_, overlap, top, progress));
1404         if (allocation.alloc_ > saved)
1405             pad(output, allocation.alloc_ - saved);
1406         else
1407             _assert(allocation.alloc_ == saved);
1408         position += allocation.alloc_;
1409     }
1410 }
1411
1412 }
1413
1414 typedef std::map<uint32_t, std::string> Blobs;
1415
1416 static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) {
1417     auto value(buffer.str());
1418     std::swap(blobs[slot], value);
1419 }
1420
1421 static const std::string &insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) {
1422     auto value(buffer.str());
1423     Blob blob;
1424     blob.magic = Swap(magic);
1425     blob.length = Swap(uint32_t(sizeof(blob) + value.size()));
1426     value.insert(0, reinterpret_cast<char *>(&blob), sizeof(blob));
1427     auto &save(blobs[slot]);
1428     std::swap(save, value);
1429     return save;
1430 }
1431
1432 static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) {
1433     size_t total(0);
1434     _foreach (blob, blobs)
1435         total += blob.second.size();
1436
1437     struct SuperBlob super;
1438     super.blob.magic = Swap(magic);
1439     super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total));
1440     super.count = Swap(uint32_t(blobs.size()));
1441     put(output, &super, sizeof(super));
1442
1443     size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size());
1444
1445     _foreach (blob, blobs) {
1446         BlobIndex index;
1447         index.type = Swap(blob.first);
1448         index.offset = Swap(uint32_t(offset));
1449         put(output, &index, sizeof(index));
1450         offset += blob.second.size();
1451     }
1452
1453     _foreach (blob, blobs)
1454         put(output, blob.second.data(), blob.second.size());
1455
1456     return offset;
1457 }
1458
1459 #ifndef LDID_NOSMIME
1460 class Buffer {
1461   private:
1462     BIO *bio_;
1463
1464   public:
1465     Buffer(BIO *bio) :
1466         bio_(bio)
1467     {
1468         _assert(bio_ != NULL);
1469     }
1470
1471     Buffer() :
1472         bio_(BIO_new(BIO_s_mem()))
1473     {
1474     }
1475
1476     Buffer(const char *data, size_t size) :
1477         Buffer(BIO_new_mem_buf(const_cast<char *>(data), size))
1478     {
1479     }
1480
1481     Buffer(const std::string &data) :
1482         Buffer(data.data(), data.size())
1483     {
1484     }
1485
1486     Buffer(PKCS7 *pkcs) :
1487         Buffer()
1488     {
1489         _assert(i2d_PKCS7_bio(bio_, pkcs) != 0);
1490     }
1491
1492     ~Buffer() {
1493         BIO_free_all(bio_);
1494     }
1495
1496     operator BIO *() const {
1497         return bio_;
1498     }
1499
1500     explicit operator std::string() const {
1501         char *data;
1502         auto size(BIO_get_mem_data(bio_, &data));
1503         return std::string(data, size);
1504     }
1505 };
1506
1507 class Stuff {
1508   private:
1509     PKCS12 *value_;
1510     EVP_PKEY *key_;
1511     X509 *cert_;
1512     STACK_OF(X509) *ca_;
1513
1514   public:
1515     Stuff(BIO *bio) :
1516         value_(d2i_PKCS12_bio(bio, NULL)),
1517         ca_(NULL)
1518     {
1519         _assert(value_ != NULL);
1520         _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0);
1521
1522         _assert(key_ != NULL);
1523         _assert(cert_ != NULL);
1524
1525         if (ca_ == NULL)
1526             ca_ = sk_X509_new_null();
1527         _assert(ca_ != NULL);
1528     }
1529
1530     Stuff(const std::string &data) :
1531         Stuff(Buffer(data))
1532     {
1533     }
1534
1535     ~Stuff() {
1536         sk_X509_pop_free(ca_, X509_free);
1537         X509_free(cert_);
1538         EVP_PKEY_free(key_);
1539         PKCS12_free(value_);
1540     }
1541
1542     operator PKCS12 *() const {
1543         return value_;
1544     }
1545
1546     operator EVP_PKEY *() const {
1547         return key_;
1548     }
1549
1550     operator X509 *() const {
1551         return cert_;
1552     }
1553
1554     operator STACK_OF(X509) *() const {
1555         return ca_;
1556     }
1557 };
1558
1559 class Signature {
1560   private:
1561     PKCS7 *value_;
1562
1563   public:
1564     Signature(const Stuff &stuff, const Buffer &data, const std::string &xml) {
1565         value_ = PKCS7_new();
1566         _assert(value_ != NULL);
1567
1568         _assert(PKCS7_set_type(value_, NID_pkcs7_signed));
1569         _assert(PKCS7_content_new(value_, NID_pkcs7_data));
1570
1571         STACK_OF(X509) *certs(stuff);
1572         for (unsigned i(0), e(sk_X509_num(certs)); i != e; i++)
1573             _assert(PKCS7_add_certificate(value_, sk_X509_value(certs, e - i - 1)));
1574
1575         auto info(PKCS7_sign_add_signer(value_, stuff, stuff, NULL, PKCS7_NOSMIMECAP));
1576         _assert(info != NULL);
1577
1578         PKCS7_set_detached(value_, 1);
1579
1580         ASN1_OCTET_STRING *string(ASN1_OCTET_STRING_new());
1581         _assert(string != NULL);
1582         try {
1583             _assert(ASN1_STRING_set(string, xml.data(), xml.size()));
1584
1585             static auto nid(OBJ_create("1.2.840.113635.100.9.1", "", ""));
1586             _assert(PKCS7_add_signed_attribute(info, nid, V_ASN1_OCTET_STRING, string));
1587         } catch (...) {
1588             ASN1_OCTET_STRING_free(string);
1589             throw;
1590         }
1591
1592         _assert(PKCS7_final(value_, data, PKCS7_BINARY));
1593     }
1594
1595     ~Signature() {
1596         PKCS7_free(value_);
1597     }
1598
1599     operator PKCS7 *() const {
1600         return value_;
1601     }
1602 };
1603 #endif
1604
1605 class NullBuffer :
1606     public std::streambuf
1607 {
1608   public:
1609     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1610         return size;
1611     }
1612
1613     virtual int_type overflow(int_type next) {
1614         return next;
1615     }
1616 };
1617
1618 class Digest {
1619   public:
1620     uint8_t sha1_[LDID_SHA1_DIGEST_LENGTH];
1621 };
1622
1623 class HashBuffer :
1624     public std::streambuf
1625 {
1626   private:
1627     ldid::Hash &hash_;
1628
1629     LDID_SHA1_CTX sha1_;
1630     LDID_SHA256_CTX sha256_;
1631
1632   public:
1633     HashBuffer(ldid::Hash &hash) :
1634         hash_(hash)
1635     {
1636         LDID_SHA1_Init(&sha1_);
1637         LDID_SHA256_Init(&sha256_);
1638     }
1639
1640     ~HashBuffer() {
1641         LDID_SHA1_Final(reinterpret_cast<uint8_t *>(hash_.sha1_), &sha1_);
1642         LDID_SHA256_Final(reinterpret_cast<uint8_t *>(hash_.sha256_), &sha256_);
1643     }
1644
1645     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1646         LDID_SHA1_Update(&sha1_, data, size);
1647         LDID_SHA256_Update(&sha256_, data, size);
1648         return size;
1649     }
1650
1651     virtual int_type overflow(int_type next) {
1652         if (next == traits_type::eof())
1653             return sync();
1654         char value(next);
1655         xsputn(&value, 1);
1656         return next;
1657     }
1658 };
1659
1660 class HashProxy :
1661     public HashBuffer
1662 {
1663   private:
1664     std::streambuf &buffer_;
1665
1666   public:
1667     HashProxy(ldid::Hash &hash, std::streambuf &buffer) :
1668         HashBuffer(hash),
1669         buffer_(buffer)
1670     {
1671     }
1672
1673     virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
1674         _assert(HashBuffer::xsputn(data, size) == size);
1675         return buffer_.sputn(data, size);
1676     }
1677 };
1678
1679 #ifndef LDID_NOTOOLS
1680 static bool Starts(const std::string &lhs, const std::string &rhs) {
1681     return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
1682 }
1683
1684 class Split {
1685   public:
1686     std::string dir;
1687     std::string base;
1688
1689     Split(const std::string &path) {
1690         size_t slash(path.rfind('/'));
1691         if (slash == std::string::npos)
1692             base = path;
1693         else {
1694             dir = path.substr(0, slash + 1);
1695             base = path.substr(slash + 1);
1696         }
1697     }
1698 };
1699
1700 static void mkdir_p(const std::string &path) {
1701     if (path.empty())
1702         return;
1703 #ifdef __WIN32__
1704     if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST)
1705         return;
1706 #else
1707     if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
1708         return;
1709 #endif
1710     auto slash(path.rfind('/', path.size() - 1));
1711     if (slash == std::string::npos)
1712         return;
1713     mkdir_p(path.substr(0, slash));
1714 }
1715
1716 static std::string Temporary(std::filebuf &file, const Split &split) {
1717     std::string temp(split.dir + ".ldid." + split.base);
1718     mkdir_p(split.dir);
1719     _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
1720     return temp;
1721 }
1722
1723 static void Commit(const std::string &path, const std::string &temp) {
1724     struct stat info;
1725     if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
1726 #ifndef __WIN32__
1727         _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
1728 #endif
1729         _syscall(chmod(temp.c_str(), info.st_mode));
1730     }
1731
1732     _syscall(rename(temp.c_str(), path.c_str()));
1733 }
1734 #endif
1735
1736 namespace ldid {
1737
1738 #ifndef LDID_NOSMIME
1739 static void get(std::string &value, X509_NAME *name, int nid) {
1740     auto index(X509_NAME_get_index_by_NID(name, nid, -1));
1741     _assert(index >= 0);
1742     auto next(X509_NAME_get_index_by_NID(name, nid, index));
1743     _assert(next == -1);
1744     auto entry(X509_NAME_get_entry(name, index));
1745     _assert(entry != NULL);
1746     auto asn(X509_NAME_ENTRY_get_data(entry));
1747     _assert(asn != NULL);
1748     value.assign(reinterpret_cast<char *>(ASN1_STRING_data(asn)), ASN1_STRING_length(asn));
1749 }
1750 #endif
1751
1752 static void req(std::streambuf &buffer, uint32_t value) {
1753     value = Swap(value);
1754     put(buffer, &value, sizeof(value));
1755 }
1756
1757 static void req(std::streambuf &buffer, const std::string &value) {
1758     req(buffer, value.size());
1759     put(buffer, value.data(), value.size());
1760     static uint8_t zeros[] = {0,0,0,0};
1761     put(buffer, zeros, 3 - (value.size() + 3) % 4);
1762 }
1763
1764 template <size_t Size_>
1765 static void req(std::streambuf &buffer, uint8_t (&&data)[Size_]) {
1766     req(buffer, Size_);
1767     put(buffer, data, Size_);
1768     static uint8_t zeros[] = {0,0,0,0};
1769     put(buffer, zeros, 3 - (Size_ + 3) % 4);
1770 }
1771
1772 Hash Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &requirements, const std::string &key, const Slots &slots, const Progress &progress) {
1773     Hash hash;
1774
1775
1776     std::string team;
1777     std::string common;
1778
1779 #ifndef LDID_NOSMIME
1780     if (!key.empty()) {
1781         Stuff stuff(key);
1782         auto name(X509_get_subject_name(stuff));
1783         _assert(name != NULL);
1784         get(team, name, NID_organizationalUnitName);
1785         get(common, name, NID_commonName);
1786     }
1787 #endif
1788
1789
1790     std::stringbuf backing;
1791
1792     if (!requirements.empty()) {
1793         put(backing, requirements.data(), requirements.size());
1794     } else {
1795         Blobs blobs;
1796
1797         std::stringbuf requirement;
1798         req(requirement, exprForm);
1799         req(requirement, opAnd);
1800         req(requirement, opIdent);
1801         req(requirement, identifier);
1802         req(requirement, opAnd);
1803         req(requirement, opAppleGenericAnchor);
1804         req(requirement, opAnd);
1805         req(requirement, opCertField);
1806         req(requirement, 0);
1807         req(requirement, "subject.CN");
1808         req(requirement, matchEqual);
1809         req(requirement, common);
1810         req(requirement, opCertGeneric);
1811         req(requirement, 1);
1812         req(requirement, (uint8_t []) {APPLE_EXTENSION_OID, 2, 1});
1813         req(requirement, matchExists);
1814         insert(blobs, 3, CSMAGIC_REQUIREMENT, requirement);
1815
1816         put(backing, CSMAGIC_REQUIREMENTS, blobs);
1817     }
1818
1819
1820     // XXX: this is just a "sufficiently large number"
1821     size_t certificate(0x3000);
1822
1823     Allocate(idata, isize, output, fun([&](const MachHeader &mach_header, size_t size) -> size_t {
1824         size_t alloc(sizeof(struct SuperBlob));
1825
1826         uint32_t normal((size + PageSize_ - 1) / PageSize_);
1827
1828         uint32_t special(0);
1829
1830         _foreach (slot, slots)
1831             special = std::max(special, slot.first);
1832
1833         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1834             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0)
1835                 special = std::max(special, CSSLOT_INFOSLOT);
1836         }));
1837
1838         special = std::max(special, CSSLOT_REQUIREMENTS);
1839         alloc += sizeof(struct BlobIndex);
1840         alloc += backing.str().size();
1841
1842         if (!entitlements.empty()) {
1843             special = std::max(special, CSSLOT_ENTITLEMENTS);
1844             alloc += sizeof(struct BlobIndex);
1845             alloc += sizeof(struct Blob);
1846             alloc += entitlements.size();
1847         }
1848
1849         size_t directory(0);
1850
1851         directory += sizeof(struct BlobIndex);
1852         directory += sizeof(struct Blob);
1853         directory += sizeof(struct CodeDirectory);
1854         directory += identifier.size() + 1;
1855
1856         if (!team.empty())
1857             directory += team.size() + 1;
1858
1859         for (Algorithm *algorithm : GetAlgorithms())
1860             alloc = Align(alloc + directory + (special + normal) * algorithm->size_, 16);
1861
1862 #ifndef LDID_NOSMIME
1863         if (!key.empty()) {
1864             alloc += sizeof(struct BlobIndex);
1865             alloc += sizeof(struct Blob);
1866             alloc += certificate;
1867         }
1868 #endif
1869
1870         return alloc;
1871     }), fun([&](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top, const Progress &progress) -> size_t {
1872         Blobs blobs;
1873
1874         if (true) {
1875             insert(blobs, CSSLOT_REQUIREMENTS, backing);
1876         }
1877
1878         if (!entitlements.empty()) {
1879             std::stringbuf data;
1880             put(data, entitlements.data(), entitlements.size());
1881             insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data);
1882         }
1883
1884         Slots posts(slots);
1885
1886         mach_header.ForSection(fun([&](const char *segment, const char *section, void *data, size_t size) {
1887             if (strcmp(segment, "__TEXT") == 0 && section != NULL && strcmp(section, "__info_plist") == 0) {
1888                 auto &slot(posts[CSSLOT_INFOSLOT]);
1889                 for (Algorithm *algorithm : GetAlgorithms())
1890                     (*algorithm)(slot, data, size);
1891             }
1892         }));
1893
1894         unsigned total(0);
1895         for (Algorithm *pointer : GetAlgorithms()) {
1896             Algorithm &algorithm(*pointer);
1897
1898             std::stringbuf data;
1899
1900             uint32_t special(0);
1901             _foreach (blob, blobs)
1902                 special = std::max(special, blob.first);
1903             _foreach (slot, posts)
1904                 special = std::max(special, slot.first);
1905             uint32_t normal((limit + PageSize_ - 1) / PageSize_);
1906
1907             CodeDirectory directory;
1908             directory.version = Swap(uint32_t(0x00020200));
1909             directory.flags = Swap(uint32_t(0));
1910             directory.nSpecialSlots = Swap(special);
1911             directory.codeLimit = Swap(uint32_t(limit));
1912             directory.nCodeSlots = Swap(normal);
1913             directory.hashSize = algorithm.size_;
1914             directory.hashType = algorithm.type_;
1915             directory.spare1 = 0x00;
1916             directory.pageSize = PageShift_;
1917             directory.spare2 = Swap(uint32_t(0));
1918             directory.scatterOffset = Swap(uint32_t(0));
1919             //directory.spare3 = Swap(uint32_t(0));
1920             //directory.codeLimit64 = Swap(uint64_t(0));
1921
1922             uint32_t offset(sizeof(Blob) + sizeof(CodeDirectory));
1923
1924             directory.identOffset = Swap(uint32_t(offset));
1925             offset += identifier.size() + 1;
1926
1927             if (team.empty())
1928                 directory.teamIDOffset = Swap(uint32_t(0));
1929             else {
1930                 directory.teamIDOffset = Swap(uint32_t(offset));
1931                 offset += team.size() + 1;
1932             }
1933
1934             offset += special * algorithm.size_;
1935             directory.hashOffset = Swap(uint32_t(offset));
1936             offset += normal * algorithm.size_;
1937
1938             put(data, &directory, sizeof(directory));
1939
1940             put(data, identifier.c_str(), identifier.size() + 1);
1941             if (!team.empty())
1942                 put(data, team.c_str(), team.size() + 1);
1943
1944             std::vector<uint8_t> storage((special + normal) * algorithm.size_);
1945             auto *hashes(&storage[special * algorithm.size_]);
1946
1947             memset(storage.data(), 0, special * algorithm.size_);
1948
1949             _foreach (blob, blobs) {
1950                 auto local(reinterpret_cast<const Blob *>(&blob.second[0]));
1951                 algorithm(hashes - blob.first * algorithm.size_, local, Swap(local->length));
1952             }
1953
1954             _foreach (slot, posts)
1955                 memcpy(hashes - slot.first * algorithm.size_, algorithm[slot.second], algorithm.size_);
1956
1957             progress(0);
1958             if (normal != 1)
1959                 for (size_t i = 0; i != normal - 1; ++i) {
1960                     algorithm(hashes + i * algorithm.size_, (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_);
1961                     progress(double(i) / normal);
1962                 }
1963             if (normal != 0)
1964                 algorithm(hashes + (normal - 1) * algorithm.size_, top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1);
1965             progress(1);
1966
1967             put(data, storage.data(), storage.size());
1968
1969             const auto &save(insert(blobs, total == 0 ? CSSLOT_CODEDIRECTORY : CSSLOT_ALTERNATE + total - 1, CSMAGIC_CODEDIRECTORY, data));
1970             algorithm(hash, save.data(), save.size());
1971
1972             ++total;
1973         }
1974
1975 #ifndef LDID_NOSMIME
1976         if (!key.empty()) {
1977 #ifdef LDID_NOPLIST
1978             auto plist(CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
1979             _scope({ CFRelease(plist); });
1980
1981             auto cdhashes(CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks));
1982             _scope({ CFRelease(cdhashes); });
1983
1984             CFDictionarySetValue(plist, CFSTR("cdhashes"), cdhashes);
1985 #else
1986             auto plist(plist_new_dict());
1987             _scope({ plist_free(plist); });
1988
1989             auto cdhashes(plist_new_array());
1990             plist_dict_set_item(plist, "cdhashes", cdhashes);
1991 #endif
1992
1993             unsigned total(0);
1994             for (Algorithm *pointer : GetAlgorithms()) {
1995                 Algorithm &algorithm(*pointer);
1996                 (void) algorithm;
1997
1998                 const auto &blob(blobs[total == 0 ? CSSLOT_CODEDIRECTORY : CSSLOT_ALTERNATE + total - 1]);
1999                 ++total;
2000
2001                 std::vector<char> hash;
2002                 algorithm(hash, blob.data(), blob.size());
2003                 hash.resize(20);
2004
2005 #ifdef LDID_NOPLIST
2006                 auto value(CFDataCreate(kCFAllocatorDefault, reinterpret_cast<const UInt8 *>(hash.data()), hash.size()));
2007                 _scope({ CFRelease(value); });
2008                 CFArrayAppendValue(cdhashes, value);
2009 #else
2010                 plist_array_append_item(cdhashes, plist_new_data(hash.data(), hash.size()));
2011 #endif
2012             }
2013
2014 #ifdef LDID_NOPLIST
2015             auto created(CFPropertyListCreateXMLData(kCFAllocatorDefault, plist));
2016             _scope({ CFRelease(created); });
2017             auto xml(reinterpret_cast<const char *>(CFDataGetBytePtr(created)));
2018             auto size(CFDataGetLength(created));
2019 #else
2020             char *xml(NULL);
2021             uint32_t size;
2022             plist_to_xml(plist, &xml, &size);
2023             _scope({ free(xml); });
2024 #endif
2025
2026             std::stringbuf data;
2027             const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]);
2028
2029             Stuff stuff(key);
2030             Buffer bio(sign);
2031
2032             Signature signature(stuff, sign, std::string(xml, size));
2033             Buffer result(signature);
2034             std::string value(result);
2035             put(data, value.data(), value.size());
2036
2037             const auto &save(insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data));
2038             _assert(save.size() <= certificate);
2039         }
2040 #endif
2041
2042         return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
2043     }), progress);
2044
2045     return hash;
2046 }
2047
2048 #ifndef LDID_NOTOOLS
2049 static void Unsign(void *idata, size_t isize, std::streambuf &output, const Progress &progress) {
2050     Allocate(idata, isize, output, fun([](const MachHeader &mach_header, size_t size) -> size_t {
2051         return 0;
2052     }), fun([](const MachHeader &mach_header, std::streambuf &output, size_t limit, const std::string &overlap, const char *top, const Progress &progress) -> size_t {
2053         return 0;
2054     }), progress);
2055 }
2056
2057 std::string DiskFolder::Path(const std::string &path) const {
2058     return path_ + "/" + path;
2059 }
2060
2061 DiskFolder::DiskFolder(const std::string &path) :
2062     path_(path)
2063 {
2064 }
2065
2066 DiskFolder::~DiskFolder() {
2067     if (!std::uncaught_exception())
2068         for (const auto &commit : commit_)
2069             Commit(commit.first, commit.second);
2070 }
2071
2072 #ifndef __WIN32__
2073 std::string readlink(const std::string &path) {
2074     for (size_t size(1024); ; size *= 2) {
2075         std::string data;
2076         data.resize(size);
2077
2078         int writ(_syscall(::readlink(path.c_str(), &data[0], data.size())));
2079         if (size_t(writ) >= size)
2080             continue;
2081
2082         data.resize(writ);
2083         return data;
2084     }
2085 }
2086 #endif
2087
2088 void DiskFolder::Find(const std::string &root, const std::string &base, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
2089     std::string path(Path(root) + base);
2090
2091     DIR *dir(opendir(path.c_str()));
2092     _assert(dir != NULL);
2093     _scope({ _syscall(closedir(dir)); });
2094
2095     while (auto child = readdir(dir)) {
2096         std::string name(child->d_name);
2097         if (name == "." || name == "..")
2098             continue;
2099         if (Starts(name, ".ldid."))
2100             continue;
2101
2102         bool directory;
2103
2104 #ifdef __WIN32__
2105         struct stat info;
2106         _syscall(stat((path + name).c_str(), &info));
2107         if (false);
2108         else if (S_ISDIR(info.st_mode))
2109             directory = true;
2110         else if (S_ISREG(info.st_mode))
2111             directory = false;
2112         else
2113             _assert_(false, "st_mode=%x", info.st_mode);
2114 #else
2115         switch (child->d_type) {
2116             case DT_DIR:
2117                 directory = true;
2118                 break;
2119             case DT_REG:
2120                 directory = false;
2121                 break;
2122             case DT_LNK:
2123                 link(base + name, fun([&]() { return readlink(path + name); }));
2124                 continue;
2125             default:
2126                 _assert_(false, "d_type=%u", child->d_type);
2127         }
2128 #endif
2129
2130         if (directory)
2131             Find(root, base + name + "/", code, link);
2132         else
2133             code(base + name);
2134     }
2135 }
2136
2137 void DiskFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2138     if (!edit) {
2139         // XXX: use nullbuf
2140         std::stringbuf save;
2141         code(save);
2142     } else {
2143         std::filebuf save;
2144         auto from(Path(path));
2145         commit_[from] = Temporary(save, from);
2146         code(save);
2147     }
2148 }
2149
2150 bool DiskFolder::Look(const std::string &path) const {
2151     return _syscall(access(Path(path).c_str(), R_OK), ENOENT) == 0;
2152 }
2153
2154 void DiskFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2155     std::filebuf data;
2156     auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in));
2157     _assert_(result == &data, "DiskFolder::Open(%s)", path.c_str());
2158
2159     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2160     data.pubseekpos(0, std::ios::in);
2161     code(data, length, NULL);
2162 }
2163
2164 void DiskFolder::Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
2165     Find(path, "", code, link);
2166 }
2167 #endif
2168
2169 SubFolder::SubFolder(Folder &parent, const std::string &path) :
2170     parent_(parent),
2171     path_(path)
2172 {
2173 }
2174
2175 void SubFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2176     return parent_.Save(path_ + path, edit, flag, code);
2177 }
2178
2179 bool SubFolder::Look(const std::string &path) const {
2180     return parent_.Look(path_ + path);
2181 }
2182
2183 void SubFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2184     return parent_.Open(path_ + path, code);
2185 }
2186
2187 void SubFolder::Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
2188     return parent_.Find(path_ + path, code, link);
2189 }
2190
2191 std::string UnionFolder::Map(const std::string &path) const {
2192     auto remap(remaps_.find(path));
2193     if (remap == remaps_.end())
2194         return path;
2195     return remap->second;
2196 }
2197
2198 void UnionFolder::Map(const std::string &path, const Functor<void (const std::string &)> &code, const std::string &file, const Functor<void (const Functor<void (std::streambuf &, size_t, const void *)> &)> &save) const {
2199     if (file.size() >= path.size() && file.substr(0, path.size()) == path)
2200         code(file.substr(path.size()));
2201 }
2202
2203 UnionFolder::UnionFolder(Folder &parent) :
2204     parent_(parent)
2205 {
2206 }
2207
2208 void UnionFolder::Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) {
2209     return parent_.Save(Map(path), edit, flag, code);
2210 }
2211
2212 bool UnionFolder::Look(const std::string &path) const {
2213     auto file(resets_.find(path));
2214     if (file != resets_.end())
2215         return true;
2216     return parent_.Look(Map(path));
2217 }
2218
2219 void UnionFolder::Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const {
2220     auto file(resets_.find(path));
2221     if (file == resets_.end())
2222         return parent_.Open(Map(path), code);
2223     auto &entry(file->second);
2224
2225     auto &data(*entry.data_);
2226     auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2227     data.pubseekpos(0, std::ios::in);
2228     code(data, length, entry.flag_);
2229 }
2230
2231 void UnionFolder::Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const {
2232     for (auto &reset : resets_)
2233         Map(path, code, reset.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
2234             auto &entry(reset.second);
2235             auto &data(*entry.data_);
2236             auto length(data.pubseekoff(0, std::ios::end, std::ios::in));
2237             data.pubseekpos(0, std::ios::in);
2238             code(data, length, entry.flag_);
2239         }));
2240
2241     for (auto &remap : remaps_)
2242         Map(path, code, remap.first, fun([&](const Functor<void (std::streambuf &, size_t, const void *)> &code) {
2243             parent_.Open(remap.second, fun([&](std::streambuf &data, size_t length, const void *flag) {
2244                 code(data, length, flag);
2245             }));
2246         }));
2247
2248     parent_.Find(path, fun([&](const std::string &name) {
2249         if (deletes_.find(path + name) == deletes_.end())
2250             code(name);
2251     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2252         if (deletes_.find(path + name) == deletes_.end())
2253             link(name, read);
2254     }));
2255 }
2256
2257 #ifndef LDID_NOTOOLS
2258 static void copy(std::streambuf &source, std::streambuf &target, size_t length, const Progress &progress) {
2259     progress(0);
2260     size_t total(0);
2261     for (;;) {
2262         char data[4096 * 4];
2263         size_t writ(source.sgetn(data, sizeof(data)));
2264         if (writ == 0)
2265             break;
2266         _assert(target.sputn(data, writ) == writ);
2267         total += writ;
2268         progress(double(total) / length);
2269     }
2270 }
2271
2272 #ifndef LDID_NOPLIST
2273 static plist_t plist(const std::string &data) {
2274     plist_t plist(NULL);
2275     if (Starts(data, "bplist00"))
2276         plist_from_bin(data.data(), data.size(), &plist);
2277     else
2278         plist_from_xml(data.data(), data.size(), &plist);
2279     _assert(plist != NULL);
2280     return plist;
2281 }
2282
2283 static void plist_d(std::streambuf &buffer, size_t length, const Functor<void (plist_t)> &code) {
2284     std::stringbuf data;
2285     copy(buffer, data, length, dummy_);
2286     auto node(plist(data.str()));
2287     _scope({ plist_free(node); });
2288     _assert(plist_get_node_type(node) == PLIST_DICT);
2289     code(node);
2290 }
2291
2292 static std::string plist_s(plist_t node) {
2293     _assert(node != NULL);
2294     _assert(plist_get_node_type(node) == PLIST_STRING);
2295     char *data;
2296     plist_get_string_val(node, &data);
2297     _scope({ free(data); });
2298     return data;
2299 }
2300 #endif
2301
2302 enum Mode {
2303     NoMode,
2304     OptionalMode,
2305     OmitMode,
2306     NestedMode,
2307     TopMode,
2308 };
2309
2310 class Expression {
2311   private:
2312     regex_t regex_;
2313     std::vector<std::string> matches_;
2314
2315   public:
2316     Expression(const std::string &code) {
2317         _assert_(regcomp(&regex_, code.c_str(), REG_EXTENDED) == 0, "regcomp()");
2318         matches_.resize(regex_.re_nsub + 1);
2319     }
2320
2321     ~Expression() {
2322         regfree(&regex_);
2323     }
2324
2325     bool operator ()(const std::string &data) {
2326         regmatch_t matches[matches_.size()];
2327         auto value(regexec(&regex_, data.c_str(), matches_.size(), matches, 0));
2328         if (value == REG_NOMATCH)
2329             return false;
2330         _assert_(value == 0, "regexec()");
2331         for (size_t i(0); i != matches_.size(); ++i)
2332             matches_[i].assign(data.data() + matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so);
2333         return true;
2334     }
2335
2336     const std::string &operator [](size_t index) const {
2337         return matches_[index];
2338     }
2339 };
2340
2341 struct Rule {
2342     unsigned weight_;
2343     Mode mode_;
2344     std::string code_;
2345
2346     mutable std::auto_ptr<Expression> regex_;
2347
2348     Rule(unsigned weight, Mode mode, const std::string &code) :
2349         weight_(weight),
2350         mode_(mode),
2351         code_(code)
2352     {
2353     }
2354
2355     Rule(const Rule &rhs) :
2356         weight_(rhs.weight_),
2357         mode_(rhs.mode_),
2358         code_(rhs.code_)
2359     {
2360     }
2361
2362     void Compile() const {
2363         regex_.reset(new Expression(code_));
2364     }
2365
2366     bool operator ()(const std::string &data) const {
2367         _assert(regex_.get() != NULL);
2368         return (*regex_)(data);
2369     }
2370
2371     bool operator <(const Rule &rhs) const {
2372         if (weight_ > rhs.weight_)
2373             return true;
2374         if (weight_ < rhs.weight_)
2375             return false;
2376         return mode_ > rhs.mode_;
2377     }
2378 };
2379
2380 struct RuleCode {
2381     bool operator ()(const Rule *lhs, const Rule *rhs) const {
2382         return lhs->code_ < rhs->code_;
2383     }
2384 };
2385
2386 #ifndef LDID_NOPLIST
2387 static Hash Sign(const uint8_t *prefix, size_t size, std::streambuf &buffer, Hash &hash, std::streambuf &save, const std::string &identifier, const std::string &entitlements, const std::string &requirements, const std::string &key, const Slots &slots, size_t length, const Progress &progress) {
2388     // XXX: this is a miserable fail
2389     std::stringbuf temp;
2390     put(temp, prefix, size);
2391     copy(buffer, temp, length - size, progress);
2392     // XXX: this is a stupid hack
2393     pad(temp, 0x10 - (length & 0xf));
2394     auto data(temp.str());
2395
2396     HashProxy proxy(hash, save);
2397     return Sign(data.data(), data.size(), proxy, identifier, entitlements, requirements, key, slots, progress);
2398 }
2399
2400 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, std::map<std::string, Hash> &remote, const std::string &requirements, const Functor<std::string (const std::string &, const std::string &)> &alter, const Progress &progress) {
2401     std::string executable;
2402     std::string identifier;
2403
2404     bool mac(false);
2405
2406     std::string info("Info.plist");
2407     if (!folder.Look(info) && folder.Look("Resources/" + info)) {
2408         mac = true;
2409         info = "Resources/" + info;
2410     }
2411
2412     folder.Open(info, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2413         plist_d(buffer, length, fun([&](plist_t node) {
2414             executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable"));
2415             identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier"));
2416         }));
2417     }));
2418
2419     if (!mac && folder.Look("MacOS/" + executable)) {
2420         executable = "MacOS/" + executable;
2421         mac = true;
2422     }
2423
2424     progress(root + "*");
2425
2426     std::string entitlements;
2427     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2428         // XXX: this is a miserable fail
2429         std::stringbuf temp;
2430         copy(buffer, temp, length, progress);
2431         // XXX: this is a stupid hack
2432         pad(temp, 0x10 - (length & 0xf));
2433         auto data(temp.str());
2434         entitlements = alter(root, Analyze(data.data(), data.size()));
2435     }));
2436
2437     static const std::string directory("_CodeSignature/");
2438     static const std::string signature(directory + "CodeResources");
2439
2440     std::map<std::string, std::multiset<Rule>> versions;
2441
2442     auto &rules1(versions[""]);
2443     auto &rules2(versions["2"]);
2444
2445     const std::string resources(mac ? "Resources/" : "");
2446
2447     if (true) {
2448         rules1.insert(Rule{1, NoMode, "^" + resources});
2449         rules1.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2450         rules1.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2451         rules1.insert(Rule{1010, NoMode, "^Base\\.lproj/"});
2452         rules1.insert(Rule{1, NoMode, "^version.plist$"});
2453     }
2454
2455     if (true) {
2456         rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"});
2457         rules2.insert(Rule{20, NoMode, "^" + resources});
2458         rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"});
2459         rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"});
2460         rules2.insert(Rule{1, NoMode, "^.*"});
2461         rules2.insert(Rule{1000, OptionalMode, "^" + resources + ".*\\.lproj/"});
2462         rules2.insert(Rule{1100, OmitMode, "^" + resources + ".*\\.lproj/locversion.plist$"});
2463         rules2.insert(Rule{1010, NoMode, "^Base\\.lproj/"});
2464         rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"});
2465         rules2.insert(Rule{20, OmitMode, "^PkgInfo$"});
2466         rules2.insert(Rule{10, NestedMode, "^[^/]+$"});
2467         rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"});
2468         rules2.insert(Rule{20, NoMode, "^version\\.plist$"});
2469     }
2470
2471     std::map<std::string, Hash> local;
2472
2473     std::string failure(mac ? "Contents/|Versions/[^/]*/Resources/" : "");
2474     Expression nested("^(Frameworks/[^/]*\\.framework|PlugIns/[^/]*\\.appex(()|/[^/]*.app))/(" + failure + ")Info\\.plist$");
2475     std::map<std::string, Bundle> bundles;
2476
2477     folder.Find("", fun([&](const std::string &name) {
2478         if (!nested(name))
2479             return;
2480         auto bundle(root + Split(name).dir);
2481         bundle.resize(bundle.size() - resources.size());
2482         SubFolder subfolder(folder, bundle);
2483
2484         bundles[nested[1]] = Sign(bundle, subfolder, key, local, "", Starts(name, "PlugIns/") ? alter :
2485             static_cast<const Functor<std::string (const std::string &, const std::string &)> &>(fun([&](const std::string &, const std::string &) -> std::string { return entitlements; }))
2486         , progress);
2487     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2488     }));
2489
2490     std::set<std::string> excludes;
2491
2492     auto exclude([&](const std::string &name) {
2493         // BundleDiskRep::adjustResources -> builder.addExclusion
2494         if (name == executable || Starts(name, directory) || Starts(name, "_MASReceipt/") || name == "CodeResources")
2495             return true;
2496
2497         for (const auto &bundle : bundles)
2498             if (Starts(name, bundle.first + "/")) {
2499                 excludes.insert(name);
2500                 return true;
2501             }
2502
2503         return false;
2504     });
2505
2506     std::map<std::string, std::string> links;
2507
2508     folder.Find("", fun([&](const std::string &name) {
2509         if (exclude(name))
2510             return;
2511
2512         if (local.find(name) != local.end())
2513             return;
2514         auto &hash(local[name]);
2515
2516         folder.Open(name, fun([&](std::streambuf &data, size_t length, const void *flag) {
2517             progress(root + name);
2518
2519             union {
2520                 struct {
2521                     uint32_t magic;
2522                     uint32_t count;
2523                 };
2524
2525                 uint8_t bytes[8];
2526             } header;
2527
2528             auto size(most(data, &header.bytes, sizeof(header.bytes)));
2529
2530             if (name != "_WatchKitStub/WK" && size == sizeof(header.bytes))
2531                 switch (Swap(header.magic)) {
2532                     case FAT_MAGIC:
2533                         // Java class file format
2534                         if (Swap(header.count) >= 40)
2535                             break;
2536                     case FAT_CIGAM:
2537                     case MH_MAGIC: case MH_MAGIC_64:
2538                     case MH_CIGAM: case MH_CIGAM_64:
2539                         folder.Save(name, true, flag, fun([&](std::streambuf &save) {
2540                             Slots slots;
2541                             Sign(header.bytes, size, data, hash, save, identifier, "", "", key, slots, length, Progression(progress, root + name));
2542                         }));
2543                         return;
2544                 }
2545
2546             folder.Save(name, false, flag, fun([&](std::streambuf &save) {
2547                 HashProxy proxy(hash, save);
2548                 put(proxy, header.bytes, size);
2549                 copy(data, proxy, length - size, progress);
2550             }));
2551         }));
2552     }), fun([&](const std::string &name, const Functor<std::string ()> &read) {
2553         if (exclude(name))
2554             return;
2555
2556         links[name] = read();
2557     }));
2558
2559     auto plist(plist_new_dict());
2560     _scope({ plist_free(plist); });
2561
2562     for (const auto &version : versions) {
2563         auto files(plist_new_dict());
2564         plist_dict_set_item(plist, ("files" + version.first).c_str(), files);
2565
2566         for (const auto &rule : version.second)
2567             rule.Compile();
2568
2569         bool old(&version.second == &rules1);
2570
2571         for (const auto &hash : local)
2572             for (const auto &rule : version.second)
2573                 if (rule(hash.first)) {
2574                     if (!old && mac && excludes.find(hash.first) != excludes.end());
2575                     else if (old && rule.mode_ == NoMode)
2576                         plist_dict_set_item(files, hash.first.c_str(), plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2577                     else if (rule.mode_ != OmitMode) {
2578                         auto entry(plist_new_dict());
2579                         plist_dict_set_item(entry, "hash", plist_new_data(reinterpret_cast<const char *>(hash.second.sha1_), sizeof(hash.second.sha1_)));
2580                         if (!old)
2581                             plist_dict_set_item(entry, "hash2", plist_new_data(reinterpret_cast<const char *>(hash.second.sha256_), sizeof(hash.second.sha256_)));
2582                         if (rule.mode_ == OptionalMode)
2583                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2584                         plist_dict_set_item(files, hash.first.c_str(), entry);
2585                     }
2586
2587                     break;
2588                 }
2589
2590         for (const auto &link : links)
2591             for (const auto &rule : version.second)
2592                 if (rule(link.first)) {
2593                     if (rule.mode_ != OmitMode) {
2594                         auto entry(plist_new_dict());
2595                         plist_dict_set_item(entry, "symlink", plist_new_string(link.second.c_str()));
2596                         if (rule.mode_ == OptionalMode)
2597                             plist_dict_set_item(entry, "optional", plist_new_bool(true));
2598                         plist_dict_set_item(files, link.first.c_str(), entry);
2599                     }
2600
2601                     break;
2602                 }
2603
2604         if (!old && mac)
2605             for (const auto &bundle : bundles) {
2606                 auto entry(plist_new_dict());
2607                 plist_dict_set_item(entry, "cdhash", plist_new_data(reinterpret_cast<const char *>(bundle.second.hash.sha256_), sizeof(bundle.second.hash.sha256_)));
2608                 plist_dict_set_item(entry, "requirement", plist_new_string("anchor apple generic"));
2609                 plist_dict_set_item(files, bundle.first.c_str(), entry);
2610             }
2611     }
2612
2613     for (const auto &version : versions) {
2614         auto rules(plist_new_dict());
2615         plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules);
2616
2617         std::multiset<const Rule *, RuleCode> ordered;
2618         for (const auto &rule : version.second)
2619             ordered.insert(&rule);
2620
2621         for (const auto &rule : ordered)
2622             if (rule->weight_ == 1 && rule->mode_ == NoMode)
2623                 plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true));
2624             else {
2625                 auto entry(plist_new_dict());
2626                 plist_dict_set_item(rules, rule->code_.c_str(), entry);
2627
2628                 switch (rule->mode_) {
2629                     case NoMode:
2630                         break;
2631                     case OmitMode:
2632                         plist_dict_set_item(entry, "omit", plist_new_bool(true));
2633                         break;
2634                     case OptionalMode:
2635                         plist_dict_set_item(entry, "optional", plist_new_bool(true));
2636                         break;
2637                     case NestedMode:
2638                         plist_dict_set_item(entry, "nested", plist_new_bool(true));
2639                         break;
2640                     case TopMode:
2641                         plist_dict_set_item(entry, "top", plist_new_bool(true));
2642                         break;
2643                 }
2644
2645                 if (rule->weight_ >= 10000)
2646                     plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_));
2647                 else if (rule->weight_ != 1)
2648                     plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_));
2649             }
2650     }
2651
2652     folder.Save(signature, true, NULL, fun([&](std::streambuf &save) {
2653         HashProxy proxy(local[signature], save);
2654         char *xml(NULL);
2655         uint32_t size;
2656         plist_to_xml(plist, &xml, &size);
2657         _scope({ free(xml); });
2658         put(proxy, xml, size);
2659     }));
2660
2661     Bundle bundle;
2662     bundle.path = executable;
2663
2664     folder.Open(executable, fun([&](std::streambuf &buffer, size_t length, const void *flag) {
2665         progress(root + executable);
2666         folder.Save(executable, true, flag, fun([&](std::streambuf &save) {
2667             Slots slots;
2668             slots[1] = local.at(info);
2669             slots[3] = local.at(signature);
2670             bundle.hash = Sign(NULL, 0, buffer, local[executable], save, identifier, entitlements, requirements, key, slots, length, Progression(progress, root + executable));
2671         }));
2672     }));
2673
2674     for (const auto &entry : local)
2675         remote[root + entry.first] = entry.second;
2676
2677     return bundle;
2678 }
2679
2680 Bundle Sign(const std::string &root, Folder &folder, const std::string &key, const std::string &requirements, const Functor<std::string (const std::string &, const std::string &)> &alter, const Progress &progress) {
2681     std::map<std::string, Hash> local;
2682     return Sign(root, folder, key, local, requirements, alter, progress);
2683 }
2684 #endif
2685
2686 #endif
2687 }
2688
2689 #ifndef LDID_NOTOOLS
2690 int main(int argc, char *argv[]) {
2691 #ifndef LDID_NOSMIME
2692     OpenSSL_add_all_algorithms();
2693 #endif
2694
2695     union {
2696         uint16_t word;
2697         uint8_t byte[2];
2698     } endian = {1};
2699
2700     little_ = endian.byte[0];
2701
2702     bool flag_r(false);
2703     bool flag_e(false);
2704     bool flag_q(false);
2705
2706 #ifndef LDID_NOFLAGT
2707     bool flag_T(false);
2708 #endif
2709
2710     bool flag_S(false);
2711     bool flag_s(false);
2712
2713     bool flag_D(false);
2714
2715     bool flag_A(false);
2716     bool flag_a(false);
2717
2718     bool flag_u(false);
2719
2720     uint32_t flag_CPUType(_not(uint32_t));
2721     uint32_t flag_CPUSubtype(_not(uint32_t));
2722
2723     const char *flag_I(NULL);
2724
2725 #ifndef LDID_NOFLAGT
2726     bool timeh(false);
2727     uint32_t timev(0);
2728 #endif
2729
2730     Map entitlements;
2731     Map requirements;
2732     Map key;
2733     ldid::Slots slots;
2734
2735     std::vector<std::string> files;
2736
2737     if (argc == 1) {
2738         fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\n", argv[0]);
2739         fprintf(stderr, "   %s -e MobileSafari\n", argv[0]);
2740         fprintf(stderr, "   %s -S cat\n", argv[0]);
2741         fprintf(stderr, "   %s -Stfp.xml gdb\n", argv[0]);
2742         exit(0);
2743     }
2744
2745     for (int argi(1); argi != argc; ++argi)
2746         if (argv[argi][0] != '-')
2747             files.push_back(argv[argi]);
2748         else switch (argv[argi][1]) {
2749             case 'r':
2750                 _assert(!flag_s);
2751                 _assert(!flag_S);
2752                 flag_r = true;
2753             break;
2754
2755             case 'e': flag_e = true; break;
2756
2757             case 'E': {
2758                 const char *string = argv[argi] + 2;
2759                 const char *colon = strchr(string, ':');
2760                 _assert(colon != NULL);
2761                 Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE);
2762                 char *arge;
2763                 unsigned number(strtoul(string, &arge, 0));
2764                 _assert(arge == colon);
2765                 auto &slot(slots[number]);
2766                 for (Algorithm *algorithm : GetAlgorithms())
2767                     (*algorithm)(slot, file.data(), file.size());
2768             } break;
2769
2770             case 'q': flag_q = true; break;
2771
2772             case 'Q': {
2773                 const char *xml = argv[argi] + 2;
2774                 requirements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2775             } break;
2776
2777             case 'D': flag_D = true; break;
2778
2779             case 'a': flag_a = true; break;
2780
2781             case 'A':
2782                 _assert(!flag_A);
2783                 flag_A = true;
2784                 if (argv[argi][2] != '\0') {
2785                     const char *cpu = argv[argi] + 2;
2786                     const char *colon = strchr(cpu, ':');
2787                     _assert(colon != NULL);
2788                     char *arge;
2789                     flag_CPUType = strtoul(cpu, &arge, 0);
2790                     _assert(arge == colon);
2791                     flag_CPUSubtype = strtoul(colon + 1, &arge, 0);
2792                     _assert(arge == argv[argi] + strlen(argv[argi]));
2793                 }
2794             break;
2795
2796             case 's':
2797                 _assert(!flag_r);
2798                 _assert(!flag_S);
2799                 flag_s = true;
2800             break;
2801
2802             case 'S':
2803                 _assert(!flag_r);
2804                 _assert(!flag_s);
2805                 flag_S = true;
2806                 if (argv[argi][2] != '\0') {
2807                     const char *xml = argv[argi] + 2;
2808                     entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
2809                 }
2810             break;
2811
2812             case 'K':
2813                 if (argv[argi][2] != '\0')
2814                     key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
2815             break;
2816
2817 #ifndef LDID_NOFLAGT
2818             case 'T': {
2819                 flag_T = true;
2820                 if (argv[argi][2] == '-')
2821                     timeh = true;
2822                 else {
2823                     char *arge;
2824                     timev = strtoul(argv[argi] + 2, &arge, 0);
2825                     _assert(arge == argv[argi] + strlen(argv[argi]));
2826                 }
2827             } break;
2828 #endif
2829
2830             case 'u': {
2831                 flag_u = true;
2832             } break;
2833
2834             case 'I': {
2835                 flag_I = argv[argi] + 2;
2836             } break;
2837
2838             default:
2839                 goto usage;
2840             break;
2841         }
2842
2843     _assert(flag_S || key.empty());
2844     _assert(flag_S || flag_I == NULL);
2845
2846     if (files.empty()) usage: {
2847         exit(0);
2848     }
2849
2850     size_t filei(0), filee(0);
2851     _foreach (file, files) try {
2852         std::string path(file);
2853
2854         struct stat info;
2855         _syscall(stat(path.c_str(), &info));
2856
2857         if (S_ISDIR(info.st_mode)) {
2858 #ifndef LDID_NOPLIST
2859             _assert(!flag_r);
2860             ldid::DiskFolder folder(path);
2861             path += "/" + Sign("", folder, key, requirements, ldid::fun([&](const std::string &, const std::string &) -> std::string { return entitlements; }), dummy_).path;
2862 #else
2863             _assert(false);
2864 #endif
2865         } else if (flag_S || flag_r) {
2866             Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
2867
2868             std::filebuf output;
2869             Split split(path);
2870             auto temp(Temporary(output, split));
2871
2872             if (flag_r)
2873                 ldid::Unsign(input.data(), input.size(), output, dummy_);
2874             else {
2875                 std::string identifier(flag_I ?: split.base.c_str());
2876                 ldid::Sign(input.data(), input.size(), output, identifier, entitlements, requirements, key, slots, dummy_);
2877             }
2878
2879             Commit(path, temp);
2880         }
2881
2882         bool modify(false);
2883 #ifndef LDID_NOFLAGT
2884         if (flag_T)
2885             modify = true;
2886 #endif
2887         if (flag_s)
2888             modify = true;
2889
2890         Map mapping(path, modify);
2891         FatHeader fat_header(mapping.data(), mapping.size());
2892
2893         _foreach (mach_header, fat_header.GetMachHeaders()) {
2894             struct linkedit_data_command *signature(NULL);
2895             struct encryption_info_command *encryption(NULL);
2896
2897             if (flag_A) {
2898                 if (mach_header.GetCPUType() != flag_CPUType)
2899                     continue;
2900                 if (mach_header.GetCPUSubtype() != flag_CPUSubtype)
2901                     continue;
2902             }
2903
2904             if (flag_a)
2905                 printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype());
2906
2907             _foreach (load_command, mach_header.GetLoadCommands()) {
2908                 uint32_t cmd(mach_header.Swap(load_command->cmd));
2909
2910                 if (false);
2911                 else if (cmd == LC_CODE_SIGNATURE)
2912                     signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
2913                 else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
2914                     encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
2915                 else if (cmd == LC_LOAD_DYLIB) {
2916                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2917                     const char *name(reinterpret_cast<const char *>(load_command) + mach_header.Swap(dylib_command->dylib.name));
2918
2919                     if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) {
2920                         if (flag_u) {
2921                             Version version;
2922                             version.value = mach_header.Swap(dylib_command->dylib.current_version);
2923                             printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch);
2924                         }
2925                     }
2926                 }
2927 #ifndef LDID_NOFLAGT
2928                 else if (cmd == LC_ID_DYLIB) {
2929                     volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
2930
2931                     if (flag_T) {
2932                         uint32_t timed;
2933
2934                         if (!timeh)
2935                             timed = timev;
2936                         else {
2937                             dylib_command->dylib.timestamp = 0;
2938                             timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev);
2939                         }
2940
2941                         dylib_command->dylib.timestamp = mach_header.Swap(timed);
2942                     }
2943                 }
2944 #endif
2945             }
2946
2947             if (flag_D) {
2948                 _assert(encryption != NULL);
2949                 encryption->cryptid = mach_header.Swap(0);
2950             }
2951
2952             if (flag_e) {
2953                 _assert(signature != NULL);
2954
2955                 uint32_t data = mach_header.Swap(signature->dataoff);
2956
2957                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2958                 uint8_t *blob = top + data;
2959                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2960
2961                 for (size_t index(0); index != Swap(super->count); ++index)
2962                     if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) {
2963                         uint32_t begin = Swap(super->index[index].offset);
2964                         struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin);
2965                         fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
2966                     }
2967             }
2968
2969             if (flag_q) {
2970                 _assert(signature != NULL);
2971
2972                 uint32_t data = mach_header.Swap(signature->dataoff);
2973
2974                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2975                 uint8_t *blob = top + data;
2976                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2977
2978                 for (size_t index(0); index != Swap(super->count); ++index)
2979                     if (Swap(super->index[index].type) == CSSLOT_REQUIREMENTS) {
2980                         uint32_t begin = Swap(super->index[index].offset);
2981                         struct Blob *requirement = reinterpret_cast<struct Blob *>(blob + begin);
2982                         fwrite(requirement, 1, Swap(requirement->length), stdout);
2983                     }
2984             }
2985
2986             if (flag_s) {
2987                 _assert(signature != NULL);
2988
2989                 uint32_t data = mach_header.Swap(signature->dataoff);
2990
2991                 uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
2992                 uint8_t *blob = top + data;
2993                 struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
2994
2995                 for (size_t index(0); index != Swap(super->count); ++index)
2996                     if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) {
2997                         uint32_t begin = Swap(super->index[index].offset);
2998                         struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin + sizeof(Blob));
2999
3000                         uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[LDID_SHA1_DIGEST_LENGTH]>(blob + begin + Swap(directory->hashOffset));
3001                         uint32_t pages = Swap(directory->nCodeSlots);
3002
3003                         if (pages != 1)
3004                             for (size_t i = 0; i != pages - 1; ++i)
3005                                 LDID_SHA1(top + PageSize_ * i, PageSize_, hashes[i]);
3006                         if (pages != 0)
3007                             LDID_SHA1(top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1, hashes[pages - 1]);
3008                     }
3009             }
3010         }
3011
3012         ++filei;
3013     } catch (const char *) {
3014         ++filee;
3015         ++filei;
3016     }
3017
3018     return filee;
3019 }
3020 #endif