/* ldid - (Mach-O) Link-Loader Identity Editor * Copyright (C) 2007-2015 Jay Freeman (saurik) */ /* GNU Affero General Public License, Version 3 {{{ */ /* * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . **/ /* }}} */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef LDID_NOSMIME #include #include #include #include #endif #ifdef __APPLE__ #include #define LDID_SHA1_DIGEST_LENGTH CC_SHA1_DIGEST_LENGTH #define LDID_SHA1 CC_SHA1 #define LDID_SHA1_CTX CC_SHA1_CTX #define LDID_SHA1_Init CC_SHA1_Init #define LDID_SHA1_Update CC_SHA1_Update #define LDID_SHA1_Final CC_SHA1_Final #else #include #define LDID_SHA1_DIGEST_LENGTH SHA_DIGEST_LENGTH #define LDID_SHA1 SHA1 #define LDID_SHA1_CTX SHA_CTX #define LDID_SHA1_Init SHA1_Init #define LDID_SHA1_Update SHA1_Update #define LDID_SHA1_Final SHA1_Final #endif #ifndef LDID_NOPLIST #include #endif #include "ldid.hpp" #define _assert___(line) \ #line #define _assert__(line) \ _assert___(line) #ifdef __EXCEPTIONS #define _assert_(expr, format, ...) \ do if (!(expr)) { \ fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \ throw __FILE__ "(" _assert__(__LINE__) "): _assert(" #expr ")"; \ } while (false) #else // XXX: this is not acceptable #define _assert_(expr, format, ...) \ do if (!(expr)) { \ fprintf(stderr, "%s(%u): _assert(): " format "\n", __FILE__, __LINE__, ## __VA_ARGS__); \ exit(-1); \ } while (false) #endif #define _assert(expr) \ _assert_(expr, "%s", #expr) #define _syscall(expr, ...) [&] { for (;;) { \ auto _value(expr); \ if ((long) _value != -1) \ return _value; \ int error(errno); \ if (error == EINTR) \ continue; \ /* XXX: EINTR is included in this list to fix g++ */ \ for (auto success : (long[]) {EINTR, __VA_ARGS__}) \ if (error == success) \ return (decltype(expr)) -success; \ _assert_(false, "errno=%u", error); \ } }() #define _trace() \ fprintf(stderr, "_trace(%s:%u): %s\n", __FILE__, __LINE__, __FUNCTION__) #define _not(type) \ ((type) ~ (type) 0) #define _packed \ __attribute__((packed)) template struct Iterator_ { typedef typename Type_::const_iterator Result; }; #define _foreach(item, list) \ for (bool _stop(true); _stop; ) \ for (const __typeof__(list) &_list = (list); _stop; _stop = false) \ for (Iterator_<__typeof__(list)>::Result _item = _list.begin(); _item != _list.end(); ++_item) \ for (bool _suck(true); _suck; _suck = false) \ for (const __typeof__(*_item) &item = *_item; _suck; _suck = false) class _Scope { }; template class Scope : public _Scope { private: Function_ function_; public: Scope(const Function_ &function) : function_(function) { } ~Scope() { function_(); } }; template Scope _scope(const Function_ &function) { return Scope(function); } #define _scope__(counter, function) \ __attribute__((__unused__)) \ const _Scope &_scope ## counter(_scope([&]function)) #define _scope_(counter, function) \ _scope__(counter, function) #define _scope(function) \ _scope_(__COUNTER__, function) #define CPU_ARCH_MASK uint32_t(0xff000000) #define CPU_ARCH_ABI64 uint32_t(0x01000000) #define CPU_TYPE_ANY uint32_t(-1) #define CPU_TYPE_VAX uint32_t( 1) #define CPU_TYPE_MC680x0 uint32_t( 6) #define CPU_TYPE_X86 uint32_t( 7) #define CPU_TYPE_MC98000 uint32_t(10) #define CPU_TYPE_HPPA uint32_t(11) #define CPU_TYPE_ARM uint32_t(12) #define CPU_TYPE_MC88000 uint32_t(13) #define CPU_TYPE_SPARC uint32_t(14) #define CPU_TYPE_I860 uint32_t(15) #define CPU_TYPE_POWERPC uint32_t(18) #define CPU_TYPE_I386 CPU_TYPE_X86 #define CPU_TYPE_ARM64 (CPU_ARCH_ABI64 | CPU_TYPE_ARM) #define CPU_TYPE_POWERPC64 (CPU_ARCH_ABI64 | CPU_TYPE_POWERPC) #define CPU_TYPE_X86_64 (CPU_ARCH_ABI64 | CPU_TYPE_X86) struct fat_header { uint32_t magic; uint32_t nfat_arch; } _packed; #define FAT_MAGIC 0xcafebabe #define FAT_CIGAM 0xbebafeca struct fat_arch { uint32_t cputype; uint32_t cpusubtype; uint32_t offset; uint32_t size; uint32_t align; } _packed; struct mach_header { uint32_t magic; uint32_t cputype; uint32_t cpusubtype; uint32_t filetype; uint32_t ncmds; uint32_t sizeofcmds; uint32_t flags; } _packed; #define MH_MAGIC 0xfeedface #define MH_CIGAM 0xcefaedfe #define MH_MAGIC_64 0xfeedfacf #define MH_CIGAM_64 0xcffaedfe #define MH_DYLDLINK 0x4 #define MH_OBJECT 0x1 #define MH_EXECUTE 0x2 #define MH_DYLIB 0x6 #define MH_BUNDLE 0x8 #define MH_DYLIB_STUB 0x9 struct load_command { uint32_t cmd; uint32_t cmdsize; } _packed; #define LC_REQ_DYLD uint32_t(0x80000000) #define LC_SEGMENT uint32_t(0x01) #define LC_SYMTAB uint32_t(0x02) #define LC_DYSYMTAB uint32_t(0x0b) #define LC_LOAD_DYLIB uint32_t(0x0c) #define LC_ID_DYLIB uint32_t(0x0d) #define LC_SEGMENT_64 uint32_t(0x19) #define LC_UUID uint32_t(0x1b) #define LC_CODE_SIGNATURE uint32_t(0x1d) #define LC_SEGMENT_SPLIT_INFO uint32_t(0x1e) #define LC_REEXPORT_DYLIB uint32_t(0x1f | LC_REQ_DYLD) #define LC_ENCRYPTION_INFO uint32_t(0x21) #define LC_DYLD_INFO uint32_t(0x22) #define LC_DYLD_INFO_ONLY uint32_t(0x22 | LC_REQ_DYLD) #define LC_ENCRYPTION_INFO_64 uint32_t(0x2c) union Version { struct { uint8_t patch; uint8_t minor; uint16_t major; } _packed; uint32_t value; }; struct dylib { uint32_t name; uint32_t timestamp; uint32_t current_version; uint32_t compatibility_version; } _packed; struct dylib_command { uint32_t cmd; uint32_t cmdsize; struct dylib dylib; } _packed; struct uuid_command { uint32_t cmd; uint32_t cmdsize; uint8_t uuid[16]; } _packed; struct symtab_command { uint32_t cmd; uint32_t cmdsize; uint32_t symoff; uint32_t nsyms; uint32_t stroff; uint32_t strsize; } _packed; struct dyld_info_command { uint32_t cmd; uint32_t cmdsize; uint32_t rebase_off; uint32_t rebase_size; uint32_t bind_off; uint32_t bind_size; uint32_t weak_bind_off; uint32_t weak_bind_size; uint32_t lazy_bind_off; uint32_t lazy_bind_size; uint32_t export_off; uint32_t export_size; } _packed; struct dysymtab_command { uint32_t cmd; uint32_t cmdsize; uint32_t ilocalsym; uint32_t nlocalsym; uint32_t iextdefsym; uint32_t nextdefsym; uint32_t iundefsym; uint32_t nundefsym; uint32_t tocoff; uint32_t ntoc; uint32_t modtaboff; uint32_t nmodtab; uint32_t extrefsymoff; uint32_t nextrefsyms; uint32_t indirectsymoff; uint32_t nindirectsyms; uint32_t extreloff; uint32_t nextrel; uint32_t locreloff; uint32_t nlocrel; } _packed; struct dylib_table_of_contents { uint32_t symbol_index; uint32_t module_index; } _packed; struct dylib_module { uint32_t module_name; uint32_t iextdefsym; uint32_t nextdefsym; uint32_t irefsym; uint32_t nrefsym; uint32_t ilocalsym; uint32_t nlocalsym; uint32_t iextrel; uint32_t nextrel; uint32_t iinit_iterm; uint32_t ninit_nterm; uint32_t objc_module_info_addr; uint32_t objc_module_info_size; } _packed; struct dylib_reference { uint32_t isym:24; uint32_t flags:8; } _packed; struct relocation_info { int32_t r_address; uint32_t r_symbolnum:24; uint32_t r_pcrel:1; uint32_t r_length:2; uint32_t r_extern:1; uint32_t r_type:4; } _packed; struct nlist { union { char *n_name; int32_t n_strx; } n_un; uint8_t n_type; uint8_t n_sect; uint8_t n_desc; uint32_t n_value; } _packed; struct segment_command { uint32_t cmd; uint32_t cmdsize; char segname[16]; uint32_t vmaddr; uint32_t vmsize; uint32_t fileoff; uint32_t filesize; uint32_t maxprot; uint32_t initprot; uint32_t nsects; uint32_t flags; } _packed; struct segment_command_64 { uint32_t cmd; uint32_t cmdsize; char segname[16]; uint64_t vmaddr; uint64_t vmsize; uint64_t fileoff; uint64_t filesize; uint32_t maxprot; uint32_t initprot; uint32_t nsects; uint32_t flags; } _packed; struct section { char sectname[16]; char segname[16]; uint32_t addr; uint32_t size; uint32_t offset; uint32_t align; uint32_t reloff; uint32_t nreloc; uint32_t flags; uint32_t reserved1; uint32_t reserved2; } _packed; struct section_64 { char sectname[16]; char segname[16]; uint64_t addr; uint64_t size; uint32_t offset; uint32_t align; uint32_t reloff; uint32_t nreloc; uint32_t flags; uint32_t reserved1; uint32_t reserved2; } _packed; struct linkedit_data_command { uint32_t cmd; uint32_t cmdsize; uint32_t dataoff; uint32_t datasize; } _packed; struct encryption_info_command { uint32_t cmd; uint32_t cmdsize; uint32_t cryptoff; uint32_t cryptsize; uint32_t cryptid; } _packed; #define BIND_OPCODE_MASK 0xf0 #define BIND_IMMEDIATE_MASK 0x0f #define BIND_OPCODE_DONE 0x00 #define BIND_OPCODE_SET_DYLIB_ORDINAL_IMM 0x10 #define BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB 0x20 #define BIND_OPCODE_SET_DYLIB_SPECIAL_IMM 0x30 #define BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM 0x40 #define BIND_OPCODE_SET_TYPE_IMM 0x50 #define BIND_OPCODE_SET_ADDEND_SLEB 0x60 #define BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB 0x70 #define BIND_OPCODE_ADD_ADDR_ULEB 0x80 #define BIND_OPCODE_DO_BIND 0x90 #define BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB 0xa0 #define BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED 0xb0 #define BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB 0xc0 inline void get(std::streambuf &stream, void *data, size_t size) { _assert(stream.sgetn(static_cast(data), size) == size); } inline void put(std::streambuf &stream, const void *data, size_t size) { _assert(stream.sputn(static_cast(data), size) == size); } inline void pad(std::streambuf &stream, size_t size) { char padding[size]; memset(padding, 0, size); put(stream, padding, size); } template Type_ Align(Type_ value, size_t align) { value += align - 1; value /= align; value *= align; return value; } static const uint8_t PageShift_(0x0c); static const uint32_t PageSize_(1 << PageShift_); static inline uint16_t Swap_(uint16_t value) { return ((value >> 8) & 0x00ff) | ((value << 8) & 0xff00); } static inline uint32_t Swap_(uint32_t value) { value = ((value >> 8) & 0x00ff00ff) | ((value << 8) & 0xff00ff00); value = ((value >> 16) & 0x0000ffff) | ((value << 16) & 0xffff0000); return value; } static inline uint64_t Swap_(uint64_t value) { value = (value & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32; value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16; value = (value & 0x00ff00ff00ff00ff) << 8 | (value & 0xff00ff00ff00ff00) >> 8; return value; } static inline int16_t Swap_(int16_t value) { return Swap_(static_cast(value)); } static inline int32_t Swap_(int32_t value) { return Swap_(static_cast(value)); } static inline int64_t Swap_(int64_t value) { return Swap_(static_cast(value)); } static bool little_(true); static inline uint16_t Swap(uint16_t value) { return little_ ? Swap_(value) : value; } static inline uint32_t Swap(uint32_t value) { return little_ ? Swap_(value) : value; } static inline uint64_t Swap(uint64_t value) { return little_ ? Swap_(value) : value; } static inline int16_t Swap(int16_t value) { return Swap(static_cast(value)); } static inline int32_t Swap(int32_t value) { return Swap(static_cast(value)); } static inline int64_t Swap(int64_t value) { return Swap(static_cast(value)); } class Swapped { protected: bool swapped_; Swapped() : swapped_(false) { } public: Swapped(bool swapped) : swapped_(swapped) { } template Type_ Swap(Type_ value) const { return swapped_ ? Swap_(value) : value; } }; class Data : public Swapped { private: void *base_; size_t size_; public: Data(void *base, size_t size) : base_(base), size_(size) { } void *GetBase() const { return base_; } size_t GetSize() const { return size_; } }; class MachHeader : public Data { private: bool bits64_; struct mach_header *mach_header_; struct load_command *load_command_; public: MachHeader(void *base, size_t size) : Data(base, size) { mach_header_ = (mach_header *) base; switch (Swap(mach_header_->magic)) { case MH_CIGAM: swapped_ = !swapped_; case MH_MAGIC: bits64_ = false; break; case MH_CIGAM_64: swapped_ = !swapped_; case MH_MAGIC_64: bits64_ = true; break; default: _assert(false); } void *post = mach_header_ + 1; if (bits64_) post = (uint32_t *) post + 1; load_command_ = (struct load_command *) post; _assert( Swap(mach_header_->filetype) == MH_EXECUTE || Swap(mach_header_->filetype) == MH_DYLIB || Swap(mach_header_->filetype) == MH_BUNDLE ); } bool Bits64() const { return bits64_; } struct mach_header *operator ->() const { return mach_header_; } operator struct mach_header *() const { return mach_header_; } uint32_t GetCPUType() const { return Swap(mach_header_->cputype); } uint32_t GetCPUSubtype() const { return Swap(mach_header_->cpusubtype) & 0xff; } struct load_command *GetLoadCommand() const { return load_command_; } std::vector GetLoadCommands() const { std::vector load_commands; struct load_command *load_command = load_command_; for (uint32_t cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) { load_commands.push_back(load_command); load_command = (struct load_command *) ((uint8_t *) load_command + Swap(load_command->cmdsize)); } return load_commands; } template Target_ *GetOffset(uint32_t offset) const { return reinterpret_cast(offset + (uint8_t *) mach_header_); } }; class FatMachHeader : public MachHeader { private: fat_arch *fat_arch_; public: FatMachHeader(void *base, size_t size, fat_arch *fat_arch) : MachHeader(base, size), fat_arch_(fat_arch) { } fat_arch *GetFatArch() const { return fat_arch_; } }; class FatHeader : public Data { private: fat_header *fat_header_; std::vector mach_headers_; public: FatHeader(void *base, size_t size) : Data(base, size) { fat_header_ = reinterpret_cast(base); if (Swap(fat_header_->magic) == FAT_CIGAM) { swapped_ = !swapped_; goto fat; } else if (Swap(fat_header_->magic) != FAT_MAGIC) { fat_header_ = NULL; mach_headers_.push_back(FatMachHeader(base, size, NULL)); } else fat: { size_t fat_narch = Swap(fat_header_->nfat_arch); fat_arch *fat_arch = reinterpret_cast(fat_header_ + 1); size_t arch; for (arch = 0; arch != fat_narch; ++arch) { uint32_t arch_offset = Swap(fat_arch->offset); uint32_t arch_size = Swap(fat_arch->size); mach_headers_.push_back(FatMachHeader((uint8_t *) base + arch_offset, arch_size, fat_arch)); ++fat_arch; } } } std::vector &GetMachHeaders() { return mach_headers_; } bool IsFat() const { return fat_header_ != NULL; } struct fat_header *operator ->() const { return fat_header_; } operator struct fat_header *() const { return fat_header_; } }; #define CSMAGIC_REQUIREMENT uint32_t(0xfade0c00) #define CSMAGIC_REQUIREMENTS uint32_t(0xfade0c01) #define CSMAGIC_CODEDIRECTORY uint32_t(0xfade0c02) #define CSMAGIC_EMBEDDED_SIGNATURE uint32_t(0xfade0cc0) #define CSMAGIC_EMBEDDED_SIGNATURE_OLD uint32_t(0xfade0b02) #define CSMAGIC_EMBEDDED_ENTITLEMENTS uint32_t(0xfade7171) #define CSMAGIC_DETACHED_SIGNATURE uint32_t(0xfade0cc1) #define CSMAGIC_BLOBWRAPPER uint32_t(0xfade0b01) #define CSSLOT_CODEDIRECTORY uint32_t(0x00000) #define CSSLOT_INFOSLOT uint32_t(0x00001) #define CSSLOT_REQUIREMENTS uint32_t(0x00002) #define CSSLOT_RESOURCEDIR uint32_t(0x00003) #define CSSLOT_APPLICATION uint32_t(0x00004) #define CSSLOT_ENTITLEMENTS uint32_t(0x00005) #define CSSLOT_SIGNATURESLOT uint32_t(0x10000) #define CS_HASHTYPE_SHA1 1 struct BlobIndex { uint32_t type; uint32_t offset; } _packed; struct Blob { uint32_t magic; uint32_t length; } _packed; struct SuperBlob { struct Blob blob; uint32_t count; struct BlobIndex index[]; } _packed; struct CodeDirectory { uint32_t version; uint32_t flags; uint32_t hashOffset; uint32_t identOffset; uint32_t nSpecialSlots; uint32_t nCodeSlots; uint32_t codeLimit; uint8_t hashSize; uint8_t hashType; uint8_t spare1; uint8_t pageSize; uint32_t spare2; } _packed; #ifndef LDID_NOFLAGT extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval); #endif static void sha1(uint8_t *hash, const void *data, size_t size) { LDID_SHA1(static_cast(data), size, hash); } static void sha1(std::vector &hash, const void *data, size_t size) { hash.resize(LDID_SHA1_DIGEST_LENGTH); sha1(reinterpret_cast(hash.data()), data, size); } struct CodesignAllocation { FatMachHeader mach_header_; uint32_t offset_; uint32_t size_; uint32_t limit_; uint32_t alloc_; uint32_t align_; CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t limit, size_t alloc, size_t align) : mach_header_(mach_header), offset_(offset), size_(size), limit_(limit), alloc_(alloc), align_(align) { } }; #ifndef LDID_NOTOOLS class File { private: int file_; public: File() : file_(-1) { } ~File() { if (file_ != -1) _syscall(close(file_)); } void open(const char *path, int flags) { _assert(file_ == -1); file_ = _syscall(::open(path, flags)); } int file() const { return file_; } }; class Map { private: File file_; void *data_; size_t size_; void clear() { if (data_ == NULL) return; _syscall(munmap(data_, size_)); data_ = NULL; size_ = 0; } public: Map() : data_(NULL), size_(0) { } Map(const std::string &path, int oflag, int pflag, int mflag) : Map() { open(path, oflag, pflag, mflag); } Map(const std::string &path, bool edit) : Map() { open(path, edit); } ~Map() { clear(); } bool empty() const { return data_ == NULL; } void open(const std::string &path, int oflag, int pflag, int mflag) { clear(); file_.open(path.c_str(), oflag); int file(file_.file()); struct stat stat; _syscall(fstat(file, &stat)); size_ = stat.st_size; data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0)); } void open(const std::string &path, bool edit) { if (edit) open(path, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED); else open(path, O_RDONLY, PROT_READ, MAP_PRIVATE); } void *data() const { return data_; } size_t size() const { return size_; } operator std::string() const { return std::string(static_cast(data_), size_); } }; #endif namespace ldid { static void Allocate(const void *idata, size_t isize, std::streambuf &output, const Functor &allocate, const Functor &save) { FatHeader source(const_cast(idata), isize); size_t offset(0); if (source.IsFat()) offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch); std::vector allocations; _foreach (mach_header, source.GetMachHeaders()) { struct linkedit_data_command *signature(NULL); struct symtab_command *symtab(NULL); _foreach (load_command, mach_header.GetLoadCommands()) { uint32_t cmd(mach_header.Swap(load_command->cmd)); if (false); else if (cmd == LC_CODE_SIGNATURE) signature = reinterpret_cast(load_command); else if (cmd == LC_SYMTAB) symtab = reinterpret_cast(load_command); } size_t size; if (signature == NULL) size = mach_header.GetSize(); else { size = mach_header.Swap(signature->dataoff); _assert(size <= mach_header.GetSize()); } if (symtab != NULL) { auto end(mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize)); _assert(end <= size); _assert(end >= size - 0x10); size = end; } size_t alloc(allocate(size)); auto *fat_arch(mach_header.GetFatArch()); uint32_t align; if (fat_arch != NULL) align = source.Swap(fat_arch->align); else switch (mach_header.GetCPUType()) { case CPU_TYPE_POWERPC: case CPU_TYPE_POWERPC64: case CPU_TYPE_X86: case CPU_TYPE_X86_64: align = 0xc; break; case CPU_TYPE_ARM: case CPU_TYPE_ARM64: align = 0xe; break; default: align = 0x0; break; } offset = Align(offset, 1 << align); uint32_t limit(size); if (alloc != 0) limit = Align(limit, 0x10); allocations.push_back(CodesignAllocation(mach_header, offset, size, limit, alloc, align)); offset += size + alloc; offset = Align(offset, 0x10); } size_t position(0); if (source.IsFat()) { fat_header fat_header; fat_header.magic = Swap(FAT_MAGIC); fat_header.nfat_arch = Swap(uint32_t(allocations.size())); put(output, &fat_header, sizeof(fat_header)); position += sizeof(fat_header); _foreach (allocation, allocations) { auto &mach_header(allocation.mach_header_); fat_arch fat_arch; fat_arch.cputype = Swap(mach_header->cputype); fat_arch.cpusubtype = Swap(mach_header->cpusubtype); fat_arch.offset = Swap(allocation.offset_); fat_arch.size = Swap(allocation.limit_ + allocation.alloc_); fat_arch.align = Swap(allocation.align_); put(output, &fat_arch, sizeof(fat_arch)); position += sizeof(fat_arch); } } _foreach (allocation, allocations) { auto &mach_header(allocation.mach_header_); pad(output, allocation.offset_ - position); position = allocation.offset_; std::vector commands; _foreach (load_command, mach_header.GetLoadCommands()) { std::string copy(reinterpret_cast(load_command), load_command->cmdsize); switch (mach_header.Swap(load_command->cmd)) { case LC_CODE_SIGNATURE: continue; break; case LC_SEGMENT: { auto segment_command(reinterpret_cast(©[0])); if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0) break; size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff))); segment_command->filesize = size; segment_command->vmsize = Align(size, 1 << allocation.align_); } break; case LC_SEGMENT_64: { auto segment_command(reinterpret_cast(©[0])); if (strncmp(segment_command->segname, "__LINKEDIT", 16) != 0) break; size_t size(mach_header.Swap(allocation.limit_ + allocation.alloc_ - mach_header.Swap(segment_command->fileoff))); segment_command->filesize = size; segment_command->vmsize = Align(size, 1 << allocation.align_); } break; } commands.push_back(copy); } if (allocation.alloc_ != 0) { linkedit_data_command signature; signature.cmd = mach_header.Swap(LC_CODE_SIGNATURE); signature.cmdsize = mach_header.Swap(uint32_t(sizeof(signature))); signature.dataoff = mach_header.Swap(allocation.limit_); signature.datasize = mach_header.Swap(allocation.alloc_); commands.push_back(std::string(reinterpret_cast(&signature), sizeof(signature))); } size_t begin(position); uint32_t after(0); _foreach(command, commands) after += command.size(); std::stringbuf altern; struct mach_header header(*mach_header); header.ncmds = mach_header.Swap(uint32_t(commands.size())); header.sizeofcmds = mach_header.Swap(after); put(output, &header, sizeof(header)); put(altern, &header, sizeof(header)); position += sizeof(header); if (mach_header.Bits64()) { auto pad(mach_header.Swap(uint32_t(0))); put(output, &pad, sizeof(pad)); put(altern, &pad, sizeof(pad)); position += sizeof(pad); } _foreach(command, commands) { put(output, command.data(), command.size()); put(altern, command.data(), command.size()); position += command.size(); } uint32_t before(mach_header.Swap(mach_header->sizeofcmds)); if (before > after) { pad(output, before - after); pad(altern, before - after); position += before - after; } auto top(reinterpret_cast(mach_header.GetBase())); std::string overlap(altern.str()); overlap.append(top + overlap.size(), Align(overlap.size(), 0x1000) - overlap.size()); put(output, top + (position - begin), allocation.size_ - (position - begin)); position = begin + allocation.size_; pad(output, allocation.limit_ - allocation.size_); position += allocation.limit_ - allocation.size_; size_t saved(save(output, allocation.limit_, overlap, top)); if (allocation.alloc_ > saved) pad(output, allocation.alloc_ - saved); position += allocation.alloc_; } } } typedef std::map Blobs; static void insert(Blobs &blobs, uint32_t slot, const std::stringbuf &buffer) { auto value(buffer.str()); std::swap(blobs[slot], value); } static void insert(Blobs &blobs, uint32_t slot, uint32_t magic, const std::stringbuf &buffer) { auto value(buffer.str()); Blob blob; blob.magic = Swap(magic); blob.length = Swap(uint32_t(sizeof(blob) + value.size())); value.insert(0, reinterpret_cast(&blob), sizeof(blob)); std::swap(blobs[slot], value); } static size_t put(std::streambuf &output, uint32_t magic, const Blobs &blobs) { size_t total(0); _foreach (blob, blobs) total += blob.second.size(); struct SuperBlob super; super.blob.magic = Swap(magic); super.blob.length = Swap(uint32_t(sizeof(SuperBlob) + blobs.size() * sizeof(BlobIndex) + total)); super.count = Swap(uint32_t(blobs.size())); put(output, &super, sizeof(super)); size_t offset(sizeof(SuperBlob) + sizeof(BlobIndex) * blobs.size()); _foreach (blob, blobs) { BlobIndex index; index.type = Swap(blob.first); index.offset = Swap(uint32_t(offset)); put(output, &index, sizeof(index)); offset += blob.second.size(); } _foreach (blob, blobs) put(output, blob.second.data(), blob.second.size()); return offset; } #ifndef LDID_NOSMIME class Buffer { private: BIO *bio_; public: Buffer(BIO *bio) : bio_(bio) { _assert(bio_ != NULL); } Buffer() : bio_(BIO_new(BIO_s_mem())) { } Buffer(const char *data, size_t size) : Buffer(BIO_new_mem_buf(const_cast(data), size)) { } Buffer(const std::string &data) : Buffer(data.data(), data.size()) { } Buffer(PKCS7 *pkcs) : Buffer() { _assert(i2d_PKCS7_bio(bio_, pkcs) != 0); } ~Buffer() { BIO_free_all(bio_); } operator BIO *() const { return bio_; } explicit operator std::string() const { char *data; auto size(BIO_get_mem_data(bio_, &data)); return std::string(data, size); } }; class Stuff { private: PKCS12 *value_; EVP_PKEY *key_; X509 *cert_; STACK_OF(X509) *ca_; public: Stuff(BIO *bio) : value_(d2i_PKCS12_bio(bio, NULL)), ca_(NULL) { _assert(value_ != NULL); _assert(PKCS12_parse(value_, "", &key_, &cert_, &ca_) != 0); _assert(key_ != NULL); _assert(cert_ != NULL); } Stuff(const std::string &data) : Stuff(Buffer(data)) { } ~Stuff() { sk_X509_pop_free(ca_, X509_free); X509_free(cert_); EVP_PKEY_free(key_); PKCS12_free(value_); } operator PKCS12 *() const { return value_; } operator EVP_PKEY *() const { return key_; } operator X509 *() const { return cert_; } operator STACK_OF(X509) *() const { return ca_; } }; class Signature { private: PKCS7 *value_; public: Signature(const Stuff &stuff, const Buffer &data) : value_(PKCS7_sign(stuff, stuff, stuff, data, PKCS7_BINARY | PKCS7_DETACHED)) { _assert(value_ != NULL); } ~Signature() { PKCS7_free(value_); } operator PKCS7 *() const { return value_; } }; #endif class NullBuffer : public std::streambuf { public: virtual std::streamsize xsputn(const char_type *data, std::streamsize size) { return size; } virtual int_type overflow(int_type next) { return next; } }; class HashBuffer : public std::streambuf { private: std::vector &hash_; LDID_SHA1_CTX context_; public: HashBuffer(std::vector &hash) : hash_(hash) { LDID_SHA1_Init(&context_); } ~HashBuffer() { hash_.resize(LDID_SHA1_DIGEST_LENGTH); LDID_SHA1_Final(reinterpret_cast(hash_.data()), &context_); } virtual std::streamsize xsputn(const char_type *data, std::streamsize size) { LDID_SHA1_Update(&context_, data, size); return size; } virtual int_type overflow(int_type next) { if (next == traits_type::eof()) return sync(); char value(next); xsputn(&value, 1); return next; } }; class HashProxy : public HashBuffer { private: std::streambuf &buffer_; public: HashProxy(std::vector &hash, std::streambuf &buffer) : HashBuffer(hash), buffer_(buffer) { } virtual std::streamsize xsputn(const char_type *data, std::streamsize size) { _assert(HashBuffer::xsputn(data, size) == size); return buffer_.sputn(data, size); } }; #ifndef LDID_NOTOOLS static bool Starts(const std::string &lhs, const std::string &rhs) { return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0; } class Split { public: std::string dir; std::string base; Split(const std::string &path) { size_t slash(path.rfind('/')); if (slash == std::string::npos) base = path; else { dir = path.substr(0, slash + 1); base = path.substr(slash + 1); } } }; static void mkdir_p(const std::string &path) { if (path.empty()) return; #ifdef __WIN32__ if (_syscall(mkdir(path.c_str()), EEXIST) == -EEXIST) return; #else if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST) return; #endif auto slash(path.rfind('/', path.size() - 1)); if (slash == std::string::npos) return; mkdir_p(path.substr(0, slash)); } static std::string Temporary(std::filebuf &file, const Split &split) { std::string temp(split.dir + ".ldid." + split.base); mkdir_p(split.dir); _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str()); return temp; } static void Commit(const std::string &path, const std::string &temp) { struct stat info; if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) { #ifndef __WIN32__ _syscall(chown(temp.c_str(), info.st_uid, info.st_gid)); #endif _syscall(chmod(temp.c_str(), info.st_mode)); } _syscall(rename(temp.c_str(), path.c_str())); } #endif namespace ldid { void Sign(const void *idata, size_t isize, std::streambuf &output, const std::string &identifier, const std::string &entitlements, const std::string &key, const Slots &slots) { Allocate(idata, isize, output, fun([&](size_t size) -> size_t { size_t alloc(sizeof(struct SuperBlob)); uint32_t special(0); special = std::max(special, CSSLOT_REQUIREMENTS); alloc += sizeof(struct BlobIndex); alloc += 0xc; if (!entitlements.empty()) { special = std::max(special, CSSLOT_ENTITLEMENTS); alloc += sizeof(struct BlobIndex); alloc += sizeof(struct Blob); alloc += entitlements.size(); } special = std::max(special, CSSLOT_CODEDIRECTORY); alloc += sizeof(struct BlobIndex); alloc += sizeof(struct Blob); alloc += sizeof(struct CodeDirectory); alloc += identifier.size() + 1; if (!key.empty()) { alloc += sizeof(struct BlobIndex); alloc += sizeof(struct Blob); // XXX: this is just a "sufficiently large number" alloc += 0x3000; } _foreach (slot, slots) special = std::max(special, slot.first); uint32_t normal((size + PageSize_ - 1) / PageSize_); alloc = Align(alloc + (special + normal) * LDID_SHA1_DIGEST_LENGTH, 16); return alloc; }), fun([&](std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t { Blobs blobs; if (true) { std::stringbuf data; Blobs requirements; put(data, CSMAGIC_REQUIREMENTS, requirements); insert(blobs, CSSLOT_REQUIREMENTS, data); } if (!entitlements.empty()) { std::stringbuf data; put(data, entitlements.data(), entitlements.size()); insert(blobs, CSSLOT_ENTITLEMENTS, CSMAGIC_EMBEDDED_ENTITLEMENTS, data); } if (true) { std::stringbuf data; uint32_t special(0); _foreach (blob, blobs) special = std::max(special, blob.first); _foreach (slot, slots) special = std::max(special, slot.first); uint32_t normal((limit + PageSize_ - 1) / PageSize_); CodeDirectory directory; directory.version = Swap(uint32_t(0x00020001)); directory.flags = Swap(uint32_t(0)); directory.hashOffset = Swap(uint32_t(sizeof(Blob) + sizeof(CodeDirectory) + identifier.size() + 1 + LDID_SHA1_DIGEST_LENGTH * special)); directory.identOffset = Swap(uint32_t(sizeof(Blob) + sizeof(CodeDirectory))); directory.nSpecialSlots = Swap(special); directory.codeLimit = Swap(uint32_t(limit)); directory.nCodeSlots = Swap(normal); directory.hashSize = LDID_SHA1_DIGEST_LENGTH; directory.hashType = CS_HASHTYPE_SHA1; directory.spare1 = 0x00; directory.pageSize = PageShift_; directory.spare2 = Swap(uint32_t(0)); put(data, &directory, sizeof(directory)); put(data, identifier.c_str(), identifier.size() + 1); uint8_t storage[special + normal][LDID_SHA1_DIGEST_LENGTH]; uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = storage + special; memset(storage, 0, sizeof(*storage) * special); _foreach (blob, blobs) { auto local(reinterpret_cast(&blob.second[0])); sha1((uint8_t *) (hashes - blob.first), local, Swap(local->length)); } _foreach (slot, slots) { _assert(sizeof(*hashes) == slot.second.size()); memcpy(hashes - slot.first, slot.second.data(), slot.second.size()); } if (normal != 1) for (size_t i = 0; i != normal - 1; ++i) sha1(hashes[i], (PageSize_ * i < overlap.size() ? overlap.data() : top) + PageSize_ * i, PageSize_); if (normal != 0) sha1(hashes[normal - 1], top + PageSize_ * (normal - 1), ((limit - 1) % PageSize_) + 1); put(data, storage, sizeof(storage)); insert(blobs, CSSLOT_CODEDIRECTORY, CSMAGIC_CODEDIRECTORY, data); } #ifndef LDID_NOSMIME if (!key.empty()) { std::stringbuf data; const std::string &sign(blobs[CSSLOT_CODEDIRECTORY]); Stuff stuff(key); Buffer bio(sign); Signature signature(stuff, sign); Buffer result(signature); std::string value(result); put(data, value.data(), value.size()); insert(blobs, CSSLOT_SIGNATURESLOT, CSMAGIC_BLOBWRAPPER, data); } #endif return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs); })); } #ifndef LDID_NOTOOLS static void Unsign(void *idata, size_t isize, std::streambuf &output) { Allocate(idata, isize, output, fun([](size_t size) -> size_t { return 0; }), fun([](std::streambuf &output, size_t limit, const std::string &overlap, const char *top) -> size_t { return 0; })); } std::string DiskFolder::Path(const std::string &path) { return path_ + "/" + path; } DiskFolder::DiskFolder(const std::string &path) : path_(path) { } DiskFolder::~DiskFolder() { if (!std::uncaught_exception()) for (const auto &commit : commit_) Commit(commit.first, commit.second); } void DiskFolder::Find(const std::string &root, const std::string &base, const Functor &)> &)>&code) { std::string path(Path(root) + base); DIR *dir(opendir(path.c_str())); _assert(dir != NULL); _scope({ _syscall(closedir(dir)); }); while (auto child = readdir(dir)) { std::string name(child->d_name); if (name == "." || name == "..") continue; if (Starts(name, ".ldid.")) continue; bool directory; #ifdef __WIN32__ struct stat info; _syscall(stat(path.c_str(), &info)); if (false); else if (S_ISDIR(info.st_mode)) directory = true; else if (S_ISREG(info.st_mode)) directory = false; else _assert_(false, "st_mode=%x", info.st_mode); #else switch (child->d_type) { case DT_DIR: directory = true; break; case DT_REG: directory = false; break; default: _assert_(false, "d_type=%u", child->d_type); } #endif if (directory) Find(root, base + name + "/", code); else code(base + name, fun([&](const Functor &code) { std::string access(root + base + name); _assert_(Open(access, fun([&](std::streambuf &data) { NullBuffer save; code(data, save); })), "open(): %s", access.c_str()); })); } } void DiskFolder::Save(const std::string &path, const Functor &code) { std::filebuf save; auto from(Path(path)); commit_[from] = Temporary(save, from); code(save); } bool DiskFolder::Open(const std::string &path, const Functor &code) { std::filebuf data; auto result(data.open(Path(path).c_str(), std::ios::binary | std::ios::in)); if (result == NULL) return false; _assert(result == &data); code(data); return true; } void DiskFolder::Find(const std::string &path, const Functor &)> &)>&code) { Find(path, "", code); } #endif SubFolder::SubFolder(Folder &parent, const std::string &path) : parent_(parent), path_(path) { } void SubFolder::Save(const std::string &path, const Functor &code) { return parent_.Save(path_ + path, code); } bool SubFolder::Open(const std::string &path, const Functor &code) { return parent_.Open(path_ + path, code); } void SubFolder::Find(const std::string &path, const Functor &)> &)> &code) { return parent_.Find(path_ + path, code); } UnionFolder::UnionFolder(Folder &parent) : parent_(parent) { } void UnionFolder::Save(const std::string &path, const Functor &code) { return parent_.Save(path, code); } bool UnionFolder::Open(const std::string &path, const Functor &code) { auto file(files_.find(path)); if (file == files_.end()) return parent_.Open(path, code); auto &data(file->second); data.pubseekpos(0, std::ios::in); code(data); return true; } void UnionFolder::Find(const std::string &path, const Functor &)> &)> &code) { parent_.Find(path, fun([&](const std::string &name, const Functor &)> &save) { if (files_.find(name) == files_.end()) code(name, save); })); for (auto &file : files_) code(file.first, fun([&](const Functor &code) { parent_.Save(file.first, fun([&](std::streambuf &save) { file.second.pubseekpos(0, std::ios::in); code(file.second, save); })); })); } #ifndef LDID_NOTOOLS static size_t copy(std::streambuf &source, std::streambuf &target) { size_t total(0); for (;;) { char data[4096]; size_t writ(source.sgetn(data, sizeof(data))); if (writ == 0) break; _assert(target.sputn(data, writ) == writ); total += writ; } return total; } #ifndef LDID_NOPLIST static plist_t plist(const std::string &data) { plist_t plist(NULL); if (Starts(data, "bplist00")) plist_from_bin(data.data(), data.size(), &plist); else plist_from_xml(data.data(), data.size(), &plist); _assert(plist != NULL); return plist; } static void plist_d(std::streambuf &buffer, const Functor &code) { std::stringbuf data; copy(buffer, data); auto node(plist(data.str())); _scope({ plist_free(node); }); _assert(plist_get_node_type(node) == PLIST_DICT); code(node); } static std::string plist_s(plist_t node) { _assert(node != NULL); _assert(plist_get_node_type(node) == PLIST_STRING); char *data; plist_get_string_val(node, &data); _scope({ free(data); }); return data; } #endif enum Mode { NoMode, OptionalMode, OmitMode, NestedMode, TopMode, }; class Expression { private: regex_t regex_; public: Expression(const std::string &code) { _assert_(regcomp(®ex_, code.c_str(), REG_EXTENDED | REG_NOSUB) == 0, "regcomp()"); } ~Expression() { regfree(®ex_); } bool operator ()(const std::string &data) const { auto value(regexec(®ex_, data.c_str(), 0, NULL, 0)); if (value == REG_NOMATCH) return false; _assert_(value == 0, "regexec()"); return true; } }; struct Rule { unsigned weight_; Mode mode_; std::string code_; mutable std::auto_ptr regex_; Rule(unsigned weight, Mode mode, const std::string &code) : weight_(weight), mode_(mode), code_(code) { } Rule(const Rule &rhs) : weight_(rhs.weight_), mode_(rhs.mode_), code_(rhs.code_) { } void Compile() const { regex_.reset(new Expression(code_)); } bool operator ()(const std::string &data) const { _assert(regex_.get() != NULL); return (*regex_)(data); } bool operator <(const Rule &rhs) const { if (weight_ > rhs.weight_) return true; if (weight_ < rhs.weight_) return false; return mode_ > rhs.mode_; } }; struct RuleCode { bool operator ()(const Rule *lhs, const Rule *rhs) const { return lhs->code_ < rhs->code_; } }; #ifndef LDID_NOPLIST std::string Bundle(const std::string &root, Folder &folder, const std::string &key, std::map> &remote, const std::string &entitlements) { std::string executable; std::string identifier; static const std::string info("Info.plist"); _assert_(folder.Open(info, fun([&](std::streambuf &buffer) { plist_d(buffer, fun([&](plist_t node) { executable = plist_s(plist_dict_get_item(node, "CFBundleExecutable")); identifier = plist_s(plist_dict_get_item(node, "CFBundleIdentifier")); })); })), "open(): Info.plist"); std::map> versions; auto &rules1(versions[""]); auto &rules2(versions["2"]); static const std::string signature("_CodeSignature/CodeResources"); folder.Open(signature, fun([&](std::streambuf &buffer) { plist_d(buffer, fun([&](plist_t node) { // XXX: maybe attempt to preserve existing rules })); })); if (true) { rules1.insert(Rule{1, NoMode, "^"}); rules1.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"}); rules1.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"}); rules1.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"}); rules1.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"}); rules1.insert(Rule{1, NoMode, "^version.plist$"}); } if (true) { rules2.insert(Rule{11, NoMode, ".*\\.dSYM($|/)"}); rules2.insert(Rule{20, NoMode, "^"}); rules2.insert(Rule{2000, OmitMode, "^(.*/)?\\.DS_Store$"}); rules2.insert(Rule{10000, OmitMode, "^(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/|())SC_Info/[^/]+\\.(sinf|supf|supp)$"}); rules2.insert(Rule{10, NestedMode, "^(Frameworks|SharedFrameworks|PlugIns|Plug-ins|XPCServices|Helpers|MacOS|Library/(Automator|Spotlight|LoginItems))/"}); rules2.insert(Rule{1, NoMode, "^.*"}); rules2.insert(Rule{1000, OptionalMode, "^.*\\.lproj/"}); rules2.insert(Rule{1100, OmitMode, "^.*\\.lproj/locversion.plist$"}); rules2.insert(Rule{20, OmitMode, "^Info\\.plist$"}); rules2.insert(Rule{20, OmitMode, "^PkgInfo$"}); rules2.insert(Rule{10000, OmitMode, "^Watch/[^/]+\\.app/(Frameworks/[^/]+\\.framework/|PlugIns/[^/]+\\.appex/|PlugIns/[^/]+\\.appex/Frameworks/[^/]+\\.framework/)SC_Info/[^/]+\\.(sinf|supf|supp)$"}); rules2.insert(Rule{10, NestedMode, "^[^/]+$"}); rules2.insert(Rule{20, NoMode, "^embedded\\.provisionprofile$"}); rules2.insert(Rule{20, NoMode, "^version\\.plist$"}); } std::map> local; static Expression nested("^PlugIns/[^/]*\\.appex/Info\\.plist$"); folder.Find("", fun([&](const std::string &name, const Functor &)> &code) { if (!nested(name)) return; auto bundle(root + Split(name).dir); SubFolder subfolder(folder, bundle); Bundle(bundle, subfolder, key, local, ""); })); folder.Find("", fun([&](const std::string &name, const Functor &)> &code) { if (name == executable || name == signature) return; auto &hash(local[name]); if (!hash.empty()) return; code(fun([&](std::streambuf &data, std::streambuf &save) { HashProxy proxy(hash, save); copy(data, proxy); })); _assert(hash.size() == LDID_SHA1_DIGEST_LENGTH); })); auto plist(plist_new_dict()); _scope({ plist_free(plist); }); for (const auto &version : versions) { auto files(plist_new_dict()); plist_dict_set_item(plist, ("files" + version.first).c_str(), files); for (const auto &rule : version.second) rule.Compile(); for (const auto &hash : local) for (const auto &rule : version.second) if (rule(hash.first)) { if (rule.mode_ == NoMode) plist_dict_set_item(files, hash.first.c_str(), plist_new_data(hash.second.data(), hash.second.size())); else if (rule.mode_ == OptionalMode) { auto entry(plist_new_dict()); plist_dict_set_item(entry, "hash", plist_new_data(hash.second.data(), hash.second.size())); plist_dict_set_item(entry, "optional", plist_new_bool(true)); plist_dict_set_item(files, hash.first.c_str(), entry); } break; } } for (const auto &version : versions) { auto rules(plist_new_dict()); plist_dict_set_item(plist, ("rules" + version.first).c_str(), rules); std::multiset ordered; for (const auto &rule : version.second) ordered.insert(&rule); for (const auto &rule : ordered) if (rule->weight_ == 1 && rule->mode_ == NoMode) plist_dict_set_item(rules, rule->code_.c_str(), plist_new_bool(true)); else { auto entry(plist_new_dict()); plist_dict_set_item(rules, rule->code_.c_str(), entry); switch (rule->mode_) { case NoMode: break; case OmitMode: plist_dict_set_item(entry, "omit", plist_new_bool(true)); break; case OptionalMode: plist_dict_set_item(entry, "optional", plist_new_bool(true)); break; case NestedMode: plist_dict_set_item(entry, "nested", plist_new_bool(true)); break; case TopMode: plist_dict_set_item(entry, "top", plist_new_bool(true)); break; } if (rule->weight_ >= 10000) plist_dict_set_item(entry, "weight", plist_new_uint(rule->weight_)); else if (rule->weight_ != 1) plist_dict_set_item(entry, "weight", plist_new_real(rule->weight_)); } } folder.Save(signature, fun([&](std::streambuf &save) { HashProxy proxy(local[signature], save); char *xml(NULL); uint32_t size; plist_to_xml(plist, &xml, &size); _scope({ free(xml); }); put(proxy, xml, size); })); folder.Open(executable, fun([&](std::streambuf &buffer) { // XXX: this is a miserable fail std::stringbuf temp; copy(buffer, temp); auto data(temp.str()); folder.Save(executable, fun([&](std::streambuf &save) { Slots slots; slots[1] = local.at(info); slots[3] = local.at(signature); HashProxy proxy(local[executable], save); Sign(data.data(), data.size(), proxy, identifier, entitlements, key, slots); })); })); for (const auto &hash : local) remote[root + hash.first] = hash.second; return executable; } #endif #endif } #ifndef LDID_NOTOOLS int main(int argc, char *argv[]) { #ifndef LDID_NOSMIME OpenSSL_add_all_algorithms(); #endif union { uint16_t word; uint8_t byte[2]; } endian = {1}; little_ = endian.byte[0]; bool flag_r(false); bool flag_e(false); #ifndef LDID_NOFLAGT bool flag_T(false); #endif bool flag_S(false); bool flag_s(false); bool flag_D(false); bool flag_A(false); bool flag_a(false); bool flag_u(false); uint32_t flag_CPUType(_not(uint32_t)); uint32_t flag_CPUSubtype(_not(uint32_t)); const char *flag_I(NULL); #ifndef LDID_NOFLAGT bool timeh(false); uint32_t timev(0); #endif Map entitlements; Map key; ldid::Slots slots; std::vector files; if (argc == 1) { fprintf(stderr, "usage: %s -S[entitlements.xml] \n", argv[0]); fprintf(stderr, " %s -e MobileSafari\n", argv[0]); fprintf(stderr, " %s -S cat\n", argv[0]); fprintf(stderr, " %s -Stfp.xml gdb\n", argv[0]); exit(0); } for (int argi(1); argi != argc; ++argi) if (argv[argi][0] != '-') files.push_back(argv[argi]); else switch (argv[argi][1]) { case 'r': _assert(!flag_s); _assert(!flag_S); flag_r = true; break; case 'e': flag_e = true; break; case 'E': { const char *slot = argv[argi] + 2; const char *colon = strchr(slot, ':'); _assert(colon != NULL); Map file(colon + 1, O_RDONLY, PROT_READ, MAP_PRIVATE); char *arge; unsigned number(strtoul(slot, &arge, 0)); _assert(arge == colon); sha1(slots[number], file.data(), file.size()); } break; case 'D': flag_D = true; break; case 'a': flag_a = true; break; case 'A': _assert(!flag_A); flag_A = true; if (argv[argi][2] != '\0') { const char *cpu = argv[argi] + 2; const char *colon = strchr(cpu, ':'); _assert(colon != NULL); char *arge; flag_CPUType = strtoul(cpu, &arge, 0); _assert(arge == colon); flag_CPUSubtype = strtoul(colon + 1, &arge, 0); _assert(arge == argv[argi] + strlen(argv[argi])); } break; case 's': _assert(!flag_r); _assert(!flag_S); flag_s = true; break; case 'S': _assert(!flag_r); _assert(!flag_s); flag_S = true; if (argv[argi][2] != '\0') { const char *xml = argv[argi] + 2; entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE); } break; case 'K': if (argv[argi][2] != '\0') key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE); break; #ifndef LDID_NOFLAGT case 'T': { flag_T = true; if (argv[argi][2] == '-') timeh = true; else { char *arge; timev = strtoul(argv[argi] + 2, &arge, 0); _assert(arge == argv[argi] + strlen(argv[argi])); } } break; #endif case 'u': { flag_u = true; } break; case 'I': { flag_I = argv[argi] + 2; } break; default: goto usage; break; } _assert(flag_S || key.empty()); _assert(flag_S || flag_I == NULL); if (files.empty()) usage: { exit(0); } size_t filei(0), filee(0); _foreach (file, files) try { std::string path(file); struct stat info; _syscall(stat(path.c_str(), &info)); if (S_ISDIR(info.st_mode)) { #ifndef LDID_NOPLIST _assert(!flag_r); ldid::DiskFolder folder(path); std::map> hashes; path += "/" + Bundle("", folder, key, hashes, entitlements); #else _assert(false); #endif } else if (flag_S || flag_r) { Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE); std::filebuf output; Split split(path); auto temp(Temporary(output, split)); if (flag_r) ldid::Unsign(input.data(), input.size(), output); else { std::string identifier(flag_I ?: split.base.c_str()); ldid::Sign(input.data(), input.size(), output, identifier, entitlements, key, slots); } Commit(path, temp); } bool modify(false); #ifndef LDID_NOFLAGT if (flag_T) modify = true; #endif if (flag_s) modify = true; Map mapping(path, modify); FatHeader fat_header(mapping.data(), mapping.size()); _foreach (mach_header, fat_header.GetMachHeaders()) { struct linkedit_data_command *signature(NULL); struct encryption_info_command *encryption(NULL); if (flag_A) { if (mach_header.GetCPUType() != flag_CPUType) continue; if (mach_header.GetCPUSubtype() != flag_CPUSubtype) continue; } if (flag_a) printf("cpu=0x%x:0x%x\n", mach_header.GetCPUType(), mach_header.GetCPUSubtype()); _foreach (load_command, mach_header.GetLoadCommands()) { uint32_t cmd(mach_header.Swap(load_command->cmd)); if (false); else if (cmd == LC_CODE_SIGNATURE) signature = reinterpret_cast(load_command); else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64) encryption = reinterpret_cast(load_command); else if (cmd == LC_LOAD_DYLIB) { volatile struct dylib_command *dylib_command(reinterpret_cast(load_command)); const char *name(reinterpret_cast(load_command) + mach_header.Swap(dylib_command->dylib.name)); if (strcmp(name, "/System/Library/Frameworks/UIKit.framework/UIKit") == 0) { if (flag_u) { Version version; version.value = mach_header.Swap(dylib_command->dylib.current_version); printf("uikit=%u.%u.%u\n", version.major, version.minor, version.patch); } } } #ifndef LDID_NOFLAGT else if (cmd == LC_ID_DYLIB) { volatile struct dylib_command *dylib_command(reinterpret_cast(load_command)); if (flag_T) { uint32_t timed; if (!timeh) timed = timev; else { dylib_command->dylib.timestamp = 0; timed = hash(reinterpret_cast(mach_header.GetBase()), mach_header.GetSize(), timev); } dylib_command->dylib.timestamp = mach_header.Swap(timed); } } #endif } if (flag_D) { _assert(encryption != NULL); encryption->cryptid = mach_header.Swap(0); } if (flag_e) { _assert(signature != NULL); uint32_t data = mach_header.Swap(signature->dataoff); uint8_t *top = reinterpret_cast(mach_header.GetBase()); uint8_t *blob = top + data; struct SuperBlob *super = reinterpret_cast(blob); for (size_t index(0); index != Swap(super->count); ++index) if (Swap(super->index[index].type) == CSSLOT_ENTITLEMENTS) { uint32_t begin = Swap(super->index[index].offset); struct Blob *entitlements = reinterpret_cast(blob + begin); fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout); } } if (flag_s) { _assert(signature != NULL); uint32_t data = mach_header.Swap(signature->dataoff); uint8_t *top = reinterpret_cast(mach_header.GetBase()); uint8_t *blob = top + data; struct SuperBlob *super = reinterpret_cast(blob); for (size_t index(0); index != Swap(super->count); ++index) if (Swap(super->index[index].type) == CSSLOT_CODEDIRECTORY) { uint32_t begin = Swap(super->index[index].offset); struct CodeDirectory *directory = reinterpret_cast(blob + begin); uint8_t (*hashes)[LDID_SHA1_DIGEST_LENGTH] = reinterpret_cast(blob + begin + Swap(directory->hashOffset)); uint32_t pages = Swap(directory->nCodeSlots); if (pages != 1) for (size_t i = 0; i != pages - 1; ++i) sha1(hashes[i], top + PageSize_ * i, PageSize_); if (pages != 0) sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1); } } } ++filei; } catch (const char *) { ++filee; ++filei; } return filee; } #endif