diff options
Diffstat (limited to 'util/ldid-xerub/ldid2.cpp')
| -rw-r--r-- | util/ldid-xerub/ldid2.cpp | 1362 |
1 files changed, 1362 insertions, 0 deletions
diff --git a/util/ldid-xerub/ldid2.cpp b/util/ldid-xerub/ldid2.cpp new file mode 100644 index 000000000..30badb00c --- /dev/null +++ b/util/ldid-xerub/ldid2.cpp @@ -0,0 +1,1362 @@ +/* ldid - (Mach-O) Link-Loader Identity Editor + * Copyright (C) 2007-2012 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 <http://www.gnu.org/licenses/>. +**/ +/* }}} */ + +#include "minimal/stdlib.h" +#include "minimal/string.h" +#include "minimal/mapping.h" + +extern "C" { +#include "sha.h" +} + +#include <cstring> +#include <string> +#include <vector> + +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) + +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 + +template <typename Type_> +Type_ Align(Type_ value, size_t align) { + value += align - 1; + value /= align; + value *= align; + return value; +} + +uint16_t Swap_(uint16_t value) { + return + ((value >> 8) & 0x00ff) | + ((value << 8) & 0xff00); +} + +uint32_t Swap_(uint32_t value) { + value = ((value >> 8) & 0x00ff00ff) | + ((value << 8) & 0xff00ff00); + value = ((value >> 16) & 0x0000ffff) | + ((value << 16) & 0xffff0000); + return value; +} + +uint64_t Swap_(uint64_t value) { + value = (value & 0x00000000ffffffffULL) << 32 | (value & 0xffffffff00000000ULL) >> 32; + value = (value & 0x0000ffff0000ffffULL) << 16 | (value & 0xffff0000ffff0000ULL) >> 16; + value = (value & 0x00ff00ff00ff00ffULL) << 8 | (value & 0xff00ff00ff00ff00ULL) >> 8; + return value; +} + +int16_t Swap_(int16_t value) { + return Swap_(static_cast<uint16_t>(value)); +} + +int32_t Swap_(int32_t value) { + return Swap_(static_cast<uint32_t>(value)); +} + +int64_t Swap_(int64_t value) { + return Swap_(static_cast<uint64_t>(value)); +} + +bool little_(true); + +uint16_t Swap(uint16_t value) { + return little_ ? Swap_(value) : value; +} + +uint32_t Swap(uint32_t value) { + return little_ ? Swap_(value) : value; +} + +uint64_t Swap(uint64_t value) { + return little_ ? Swap_(value) : value; +} + +int16_t Swap(int16_t value) { + return Swap(static_cast<uint16_t>(value)); +} + +int32_t Swap(int32_t value) { + return Swap(static_cast<uint32_t>(value)); +} + +int64_t Swap(int64_t value) { + return Swap(static_cast<uint64_t>(value)); +} + +template <typename Target_> +class Pointer; + +class Data { + private: + void *base_; + size_t size_; + + protected: + bool swapped_; + + public: + Data(void *base, size_t size) : + base_(base), + size_(size), + swapped_(false) + { + } + + uint16_t Swap(uint16_t value) const { + return swapped_ ? Swap_(value) : value; + } + + uint32_t Swap(uint32_t value) const { + return swapped_ ? Swap_(value) : value; + } + + uint64_t Swap(uint64_t value) const { + return swapped_ ? Swap_(value) : value; + } + + int16_t Swap(int16_t value) const { + return Swap(static_cast<uint16_t>(value)); + } + + int32_t Swap(int32_t value) const { + return Swap(static_cast<uint32_t>(value)); + } + + int64_t Swap(int64_t value) const { + return Swap(static_cast<uint64_t>(value)); + } + + 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 + ); + } + + 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<struct load_command *> GetLoadCommands() const { + std::vector<struct load_command *> 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; + } + + std::vector<segment_command *> GetSegments(const char *segment_name) const { + std::vector<struct segment_command *> segment_commands; + + _foreach (load_command, GetLoadCommands()) { + if (Swap(load_command->cmd) == LC_SEGMENT) { + segment_command *segment_command = reinterpret_cast<struct segment_command *>(load_command); + if (strncmp(segment_command->segname, segment_name, 16) == 0) + segment_commands.push_back(segment_command); + } + } + + return segment_commands; + } + + std::vector<segment_command_64 *> GetSegments64(const char *segment_name) const { + std::vector<struct segment_command_64 *> segment_commands; + + _foreach (load_command, GetLoadCommands()) { + if (Swap(load_command->cmd) == LC_SEGMENT_64) { + segment_command_64 *segment_command = reinterpret_cast<struct segment_command_64 *>(load_command); + if (strncmp(segment_command->segname, segment_name, 16) == 0) + segment_commands.push_back(segment_command); + } + } + + return segment_commands; + } + + std::vector<section *> GetSections(const char *segment_name, const char *section_name) const { + std::vector<section *> sections; + + _foreach (segment, GetSegments(segment_name)) { + section *section = (struct section *) (segment + 1); + + uint32_t sect; + for (sect = 0; sect != Swap(segment->nsects); ++sect) { + if (strncmp(section->sectname, section_name, 16) == 0) + sections.push_back(section); + ++section; + } + } + + return sections; + } + + template <typename Target_> + Pointer<Target_> GetPointer(uint32_t address, const char *segment_name = NULL) const { + load_command *load_command = (struct load_command *) (mach_header_ + 1); + uint32_t cmd; + + for (cmd = 0; cmd != Swap(mach_header_->ncmds); ++cmd) { + if (Swap(load_command->cmd) == LC_SEGMENT) { + segment_command *segment_command = (struct segment_command *) load_command; + if (segment_name != NULL && strncmp(segment_command->segname, segment_name, 16) != 0) + goto next_command; + + section *sections = (struct section *) (segment_command + 1); + + uint32_t sect; + for (sect = 0; sect != Swap(segment_command->nsects); ++sect) { + section *section = §ions[sect]; + //printf("%s %u %p %p %u\n", segment_command->segname, sect, address, section->addr, section->size); + if (address >= Swap(section->addr) && address < Swap(section->addr) + Swap(section->size)) { + //printf("0x%.8x %s\n", address, segment_command->segname); + return Pointer<Target_>(this, reinterpret_cast<Target_ *>(address - Swap(section->addr) + Swap(section->offset) + (char *) mach_header_)); + } + } + } + + next_command: + load_command = (struct load_command *) ((char *) load_command + Swap(load_command->cmdsize)); + } + + return Pointer<Target_>(this); + } + + template <typename Target_> + Pointer<Target_> GetOffset(uint32_t offset) { + return Pointer<Target_>(this, reinterpret_cast<Target_ *>(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<FatMachHeader> mach_headers_; + + public: + FatHeader(void *base, size_t size) : + Data(base, size) + { + fat_header_ = reinterpret_cast<struct fat_header *>(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<struct fat_arch *>(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<FatMachHeader> &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_; + } +}; + +FatHeader Map(const char *path, bool ro = false) { + size_t size; + void *base(map(path, 0, _not(size_t), &size, ro)); + return FatHeader(base, size); +} + +template <typename Target_> +class Pointer { + private: + const MachHeader *framework_; + const Target_ *pointer_; + + public: + Pointer(const MachHeader *framework = NULL, const Target_ *pointer = NULL) : + framework_(framework), + pointer_(pointer) + { + } + + operator const Target_ *() const { + return pointer_; + } + + const Target_ *operator ->() const { + return pointer_; + } + + Pointer<Target_> &operator ++() { + ++pointer_; + return *this; + } + + template <typename Value_> + Value_ Swap(Value_ value) { + return framework_->Swap(value); + } +}; + +#define CSMAGIC_CODEDIRECTORY uint32_t(0xfade0c02) +#define CSMAGIC_EMBEDDED_SIGNATURE uint32_t(0xfade0cc0) +#define CSMAGIC_ENTITLEMENTS uint32_t(0xfade7171) + +#define CSSLOT_CODEDIRECTORY uint32_t(0) +#define CSSLOT_REQUIREMENTS uint32_t(2) +#define CSSLOT_ENTITLEMENTS uint32_t(5) + +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 { + struct Blob blob; + 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; + +extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval); + +void sha2(uint8_t *hash, uint8_t *data, size_t size) { + SHA256Context context; + SHA256Reset(&context); + SHA256Input(&context, data, size); + SHA256Result(&context, hash); +} + +struct CodesignAllocation { + FatMachHeader mach_header_; + uint32_t offset_; + uint32_t size_; + uint32_t alloc_; + uint32_t align_; + + CodesignAllocation(FatMachHeader mach_header, size_t offset, size_t size, size_t alloc, size_t align) : + mach_header_(mach_header), + offset_(offset), + size_(size), + alloc_(alloc), + align_(align) + { + } +}; + +int main(int argc, const char *argv[]) { + union { + uint16_t word; + uint8_t byte[2]; + } endian = {1}; + + little_ = endian.byte[0]; + + bool flag_R(false); + bool flag_r(false); + + bool flag_t(false); + bool flag_p(false); + bool flag_u(false); + bool flag_e(false); + + bool flag_T(false); + + bool flag_S(false); + bool flag_s(false); + + bool flag_O(false); + + bool flag_D(false); + bool flag_d(false); + + bool flag_A(false); + bool flag_a(false); + + uint32_t flag_CPUType(_not(uint32_t)); + uint32_t flag_CPUSubtype(_not(uint32_t)); + + const char *flag_I(NULL); + + bool timeh(false); + uint32_t timev(0); + + const void *xmld(NULL); + size_t xmls(0); + + uintptr_t noffset(_not(uintptr_t)); + uintptr_t woffset(_not(uintptr_t)); + + std::vector<std::string> files; + + if (argc == 1) { + fprintf(stderr, "usage: %s -S[entitlements.xml] <binary>\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': flag_R = true; break; + case 'r': flag_r = true; break; + + case 't': flag_t = true; break; + case 'u': flag_u = true; break; + case 'p': flag_p = true; break; + case 'e': flag_e = true; break; + case 'O': flag_O = true; break; + + case 'D': flag_D = true; break; + case 'd': flag_d = true; break; + + case 'a': flag_a = true; break; + + case '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_S); + flag_s = true; + break; + + case 'S': + _assert(!flag_s); + flag_S = true; + if (argv[argi][2] != '\0') { + const char *xml = argv[argi] + 2; + xmld = map(xml, 0, _not(size_t), &xmls, true); + } + break; + + 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; + + case 'I': { + flag_I = argv[argi] + 2; + } break; + + case 'n': { + char *arge; + noffset = strtoul(argv[argi] + 2, &arge, 0); + _assert(arge == argv[argi] + strlen(argv[argi])); + } break; + + case 'w': { + char *arge; + woffset = strtoul(argv[argi] + 2, &arge, 0); + _assert(arge == argv[argi] + strlen(argv[argi])); + } break; + + default: + goto usage; + break; + } + + if (files.empty()) usage: { + exit(0); + } + + size_t filei(0), filee(0); + _foreach (file, files) try { + const char *path(file.c_str()); + const char *base = strrchr(path, '/'); + char *temp(NULL), *dir; + + if (base != NULL) + dir = strndup_(path, base++ - path + 1); + else { + dir = strdup(""); + base = path; + } + + const char *name(flag_I ?: base); + + if (flag_r) { + uint32_t clip(0); { + FatHeader fat_header(Map(path)); + _foreach (mach_header, fat_header.GetMachHeaders()) { + if (flag_A) { + if (mach_header.GetCPUType() != flag_CPUType) + continue; + if (mach_header.GetCPUSubtype() != flag_CPUSubtype) + continue; + } + + mach_header->flags = mach_header.Swap(mach_header.Swap(mach_header->flags) | MH_DYLDLINK); + + uint32_t size(_not(uint32_t)); { + _foreach (load_command, mach_header.GetLoadCommands()) { + switch (mach_header.Swap(load_command->cmd)) { + case LC_CODE_SIGNATURE: { + struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(load_command); + memset(reinterpret_cast<uint8_t *>(mach_header.GetBase()) + mach_header.Swap(signature->dataoff), 0, mach_header.Swap(signature->datasize)); + memset(signature, 0, sizeof(struct linkedit_data_command)); + + mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) - 1); + mach_header->sizeofcmds = mach_header.Swap(uint32_t(mach_header.Swap(mach_header->sizeofcmds) - sizeof(struct linkedit_data_command))); + } break; + + case LC_SYMTAB: { + struct symtab_command *symtab = reinterpret_cast<struct symtab_command *>(load_command); + size = mach_header.Swap(symtab->stroff) + mach_header.Swap(symtab->strsize); + } break; + } + } + } + + _assert(size != _not(uint32_t)); + + _foreach (segment, mach_header.GetSegments("__LINKEDIT")) { + segment->filesize -= mach_header.GetSize() - size; + + if (fat_arch *fat_arch = mach_header.GetFatArch()) { + fat_arch->size = fat_header.Swap(size); + clip = std::max(clip, fat_header.Swap(fat_arch->offset) + size); + } else + clip = std::max(clip, size); + } + + _foreach (segment, mach_header.GetSegments64("__LINKEDIT")) { + segment->filesize -= mach_header.GetSize() - size; + + if (fat_arch *fat_arch = mach_header.GetFatArch()) { + fat_arch->size = fat_header.Swap(size); + clip = std::max(clip, fat_header.Swap(fat_arch->offset) + size); + } else + clip = std::max(clip, size); + } + } + } + + if (clip != 0) + _syscall(truncate(path, clip)); + } + + if (flag_S) { + FatHeader source(Map(path)); + + size_t offset(0); + + if (source.IsFat()) + offset += sizeof(fat_header) + sizeof(fat_arch) * source.Swap(source->nfat_arch); + + std::vector<CodesignAllocation> allocations; { + _foreach (mach_header, source.GetMachHeaders()) { + if (flag_A) { + if (mach_header.GetCPUType() != flag_CPUType) + continue; + if (mach_header.GetCPUSubtype() != flag_CPUSubtype) + continue; + } + + mach_header->flags = mach_header.Swap(mach_header.Swap(mach_header->flags) | MH_DYLDLINK); + + size_t size(_not(size_t)); { + _foreach (load_command, mach_header.GetLoadCommands()) { + uint32_t cmd(mach_header.Swap(load_command->cmd)); + if (cmd == LC_CODE_SIGNATURE) { + struct linkedit_data_command *signature = reinterpret_cast<struct linkedit_data_command *>(load_command); + size = mach_header.Swap(signature->dataoff); + _assert(size < mach_header.GetSize()); + break; + } + } + + if (size == _not(size_t)) + size = mach_header.GetSize(); + } + + size_t alloc(0); + alloc += sizeof(struct SuperBlob); + uint32_t special(0); + + special = std::max(special, CSSLOT_CODEDIRECTORY); + alloc += sizeof(struct BlobIndex); + alloc += sizeof(struct CodeDirectory); + alloc += strlen(name) + 1; + + special = std::max(special, CSSLOT_REQUIREMENTS); + alloc += sizeof(struct BlobIndex); + alloc += 0xc; + + if (xmld != NULL) { + special = std::max(special, CSSLOT_ENTITLEMENTS); + alloc += sizeof(struct BlobIndex); + alloc += sizeof(struct Blob); + alloc += xmls; + } + + size_t normal((size + 0x1000 - 1) / 0x1000); + alloc = Align(alloc + (special + normal) * 0x20, 16); + + fat_arch *fat_arch(mach_header.GetFatArch()); + uint32_t align(fat_arch == NULL ? 0 : source.Swap(fat_arch->align)); + offset = Align(offset, 1 << align); + + allocations.push_back(CodesignAllocation(mach_header, offset, size, alloc, align)); + offset += size + alloc; + offset = Align(offset, 16); + } + } + + asprintf(&temp, "%s.%s.cs", dir, base); + fclose(fopen(temp, "w+")); + _syscall(truncate(temp, offset)); + + void *file(map(temp, 0, offset, NULL, false)); + memset(file, 0, offset); + + fat_arch *fat_arch; + if (!source.IsFat()) + fat_arch = NULL; + else { + fat_header *fat_header(reinterpret_cast<struct fat_header *>(file)); + fat_header->magic = Swap(FAT_MAGIC); + fat_header->nfat_arch = Swap(source.Swap(source->nfat_arch)); + fat_arch = reinterpret_cast<struct fat_arch *>(fat_header + 1); + } + + _foreach (allocation, allocations) { + const FatMachHeader &source(allocation.mach_header_); + + uint32_t align(allocation.size_); + align = Align(align, 0x10); + + if (fat_arch != NULL) { + fat_arch->cputype = Swap(source->cputype); + fat_arch->cpusubtype = Swap(source->cpusubtype); + fat_arch->offset = Swap(allocation.offset_); + fat_arch->size = Swap(align + allocation.alloc_); + fat_arch->align = Swap(allocation.align_); + ++fat_arch; + } + + void *target(reinterpret_cast<uint8_t *>(file) + allocation.offset_); + memcpy(target, source, allocation.size_); + MachHeader mach_header(target, align + allocation.alloc_); + + struct linkedit_data_command *signature(NULL); + _foreach (load_command, mach_header.GetLoadCommands()) { + uint32_t cmd(mach_header.Swap(load_command->cmd)); + if (cmd != LC_CODE_SIGNATURE) + continue; + signature = reinterpret_cast<struct linkedit_data_command *>(load_command); + break; + } + + if (signature == NULL) { + mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) + 1); + signature = reinterpret_cast<struct linkedit_data_command *>(reinterpret_cast<uint8_t *>(mach_header.GetLoadCommand()) + mach_header.Swap(mach_header->sizeofcmds)); + mach_header->sizeofcmds = mach_header.Swap(mach_header.Swap(mach_header->sizeofcmds) + uint32_t(sizeof(*signature))); + signature->cmd = mach_header.Swap(LC_CODE_SIGNATURE); + signature->cmdsize = mach_header.Swap(uint32_t(sizeof(*signature))); + } + + signature->dataoff = mach_header.Swap(align); + signature->datasize = mach_header.Swap(allocation.alloc_); + + _foreach (segment, mach_header.GetSegments("__LINKEDIT")) { + size_t size(mach_header.Swap(align + allocation.alloc_ - mach_header.Swap(segment->fileoff))); + segment->filesize = size; + segment->vmsize = Align(size, 0x1000); + } + + _foreach (segment, mach_header.GetSegments64("__LINKEDIT")) { + size_t size(mach_header.Swap(align + allocation.alloc_ - mach_header.Swap(segment->fileoff))); + segment->filesize = size; + segment->vmsize = Align(size, 0x1000); + } + } + } + + if (flag_p) + printf("path%zu='%s'\n", filei, file.c_str()); + + FatHeader fat_header(Map(temp == NULL ? path : temp, !(flag_R || flag_T || flag_s || flag_S || flag_O || flag_D))); + struct linkedit_data_command *signature(NULL); + + _foreach (mach_header, fat_header.GetMachHeaders()) { + 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()); + + if (flag_d) { + if (struct fat_arch *fat_arch = mach_header.GetFatArch()) + printf("offset=0x%x\n", Swap(fat_arch->offset)); + else + printf("offset=0x0\n"); + } + + if (woffset != _not(uintptr_t)) { + Pointer<uint32_t> wvalue(mach_header.GetPointer<uint32_t>(woffset)); + if (wvalue == NULL) + printf("(null) %p\n", reinterpret_cast<void *>(woffset)); + else + printf("0x%.08x\n", *wvalue); + } + + if (noffset != _not(uintptr_t)) + printf("%s\n", &*mach_header.GetPointer<char>(noffset)); + + if (flag_d) + _foreach(segment, mach_header.GetSegments("__TEXT")) { + printf("vmaddr=0x%x\n", mach_header.Swap(segment->vmaddr)); + printf("fileoff=0x%x\n", mach_header.Swap(segment->fileoff)); + } + + if (flag_O) { + _foreach(section, mach_header.GetSections("__TEXT", "__text")) + section->addr = mach_header.Swap(0); + } + + _foreach (load_command, mach_header.GetLoadCommands()) { + uint32_t cmd(mach_header.Swap(load_command->cmd)); + + if (flag_R && cmd == LC_REEXPORT_DYLIB) + load_command->cmd = mach_header.Swap(LC_LOAD_DYLIB); + else if (cmd == LC_CODE_SIGNATURE) + signature = reinterpret_cast<struct linkedit_data_command *>(load_command); + else if (cmd == LC_UUID) { + volatile struct uuid_command *uuid_command(reinterpret_cast<struct uuid_command *>(load_command)); + + if (flag_u) { + printf("uuid%zu=%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x\n", filei, + uuid_command->uuid[ 0], uuid_command->uuid[ 1], uuid_command->uuid[ 2], uuid_command->uuid[ 3], + uuid_command->uuid[ 4], uuid_command->uuid[ 5], uuid_command->uuid[ 6], uuid_command->uuid[ 7], + uuid_command->uuid[ 8], uuid_command->uuid[ 9], uuid_command->uuid[10], uuid_command->uuid[11], + uuid_command->uuid[12], uuid_command->uuid[13], uuid_command->uuid[14], uuid_command->uuid[15] + ); + } + } else if (cmd == LC_ID_DYLIB) { + volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command)); + + if (flag_t) + printf("time%zu=0x%.8x\n", filei, mach_header.Swap(dylib_command->dylib.timestamp)); + + if (flag_T) { + uint32_t timed; + + if (!timeh) + timed = timev; + else { + dylib_command->dylib.timestamp = 0; + timed = hash(reinterpret_cast<uint8_t *>(mach_header.GetBase()), mach_header.GetSize(), timev); + } + + dylib_command->dylib.timestamp = mach_header.Swap(timed); + } + } else if (cmd == LC_ENCRYPTION_INFO) { + volatile struct encryption_info_command *encryption_info_command(reinterpret_cast<struct encryption_info_command *>(load_command)); + + if (flag_D) + encryption_info_command->cryptid = mach_header.Swap(0); + + if (flag_d) { + printf("cryptoff=0x%x\n", mach_header.Swap(encryption_info_command->cryptoff)); + printf("cryptsize=0x%x\n", mach_header.Swap(encryption_info_command->cryptsize)); + printf("cryptid=0x%x\n", mach_header.Swap(encryption_info_command->cryptid)); + } + } + } + + if (flag_e) { + _assert(signature != NULL); + + uint32_t data = mach_header.Swap(signature->dataoff); + + uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase()); + uint8_t *blob = top + data; + struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(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<struct Blob *>(blob + begin); + fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(struct Blob), stdout); + } + } + + if (flag_s) { + _assert(signature != NULL); + + uint32_t data = mach_header.Swap(signature->dataoff); + + uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase()); + uint8_t *blob = top + data; + struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(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<struct CodeDirectory *>(blob + begin); + + uint8_t (*hashes)[32] = reinterpret_cast<uint8_t (*)[32]>(blob + begin + Swap(directory->hashOffset)); + uint32_t pages = Swap(directory->nCodeSlots); + + if (pages != 1) + for (size_t i = 0; i != pages - 1; ++i) + sha2(hashes[i], top + 0x1000 * i, 0x1000); + if (pages != 0) + sha2(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1); + } + } + + if (flag_S) { + _assert(signature != NULL); + + uint32_t data = mach_header.Swap(signature->dataoff); + uint32_t size = mach_header.Swap(signature->datasize); + + uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase()); + uint8_t *blob = top + data; + struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob); + super->blob.magic = Swap(CSMAGIC_EMBEDDED_SIGNATURE); + + uint32_t count = xmld == NULL ? 2 : 3; + uint32_t offset = sizeof(struct SuperBlob) + count * sizeof(struct BlobIndex); + + super->index[0].type = Swap(CSSLOT_CODEDIRECTORY); + super->index[0].offset = Swap(offset); + + uint32_t begin = offset; + struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin); + offset += sizeof(struct CodeDirectory); + + directory->blob.magic = Swap(CSMAGIC_CODEDIRECTORY); + directory->version = Swap(uint32_t(0x00020001)); + directory->flags = Swap(uint32_t(0)); + directory->codeLimit = Swap(data); + directory->hashSize = 0x20; + directory->hashType = 0x02; + directory->spare1 = 0x00; + directory->pageSize = 0x0c; + directory->spare2 = Swap(uint32_t(0)); + + directory->identOffset = Swap(offset - begin); + strcpy(reinterpret_cast<char *>(blob + offset), name); + offset += strlen(name) + 1; + + uint32_t special = xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS; + directory->nSpecialSlots = Swap(special); + + uint8_t (*hashes)[32] = reinterpret_cast<uint8_t (*)[32]>(blob + offset); + memset(hashes, 0, sizeof(*hashes) * special); + + offset += sizeof(*hashes) * special; + hashes += special; + + uint32_t pages = (data + 0x1000 - 1) / 0x1000; + directory->nCodeSlots = Swap(pages); + + if (pages != 1) + for (size_t i = 0; i != pages - 1; ++i) + sha2(hashes[i], top + 0x1000 * i, 0x1000); + if (pages != 0) + sha2(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1); + + directory->hashOffset = Swap(offset - begin); + offset += sizeof(*hashes) * pages; + directory->blob.length = Swap(offset - begin); + + super->index[1].type = Swap(CSSLOT_REQUIREMENTS); + super->index[1].offset = Swap(offset); + + memcpy(blob + offset, "\xfa\xde\x0c\x01\x00\x00\x00\x0c\x00\x00\x00\x00", 0xc); + offset += 0xc; + + if (xmld != NULL) { + super->index[2].type = Swap(CSSLOT_ENTITLEMENTS); + super->index[2].offset = Swap(offset); + + uint32_t begin = offset; + struct Blob *entitlements = reinterpret_cast<struct Blob *>(blob + begin); + offset += sizeof(struct Blob); + + memcpy(blob + offset, xmld, xmls); + offset += xmls; + + entitlements->magic = Swap(CSMAGIC_ENTITLEMENTS); + entitlements->length = Swap(offset - begin); + } + + for (size_t index(0); index != count; ++index) { + uint32_t type = Swap(super->index[index].type); + if (type != 0 && type <= special) { + uint32_t offset = Swap(super->index[index].offset); + struct Blob *local = (struct Blob *) (blob + offset); + sha2((uint8_t *) (hashes - type), (uint8_t *) local, Swap(local->length)); + } + } + + super->count = Swap(count); + super->blob.length = Swap(offset); + + if (offset > size) { + fprintf(stderr, "offset (%u) > size (%u)\n", offset, size); + _assert(false); + } //else fprintf(stderr, "offset (%zu) <= size (%zu)\n", offset, size); + + memset(blob + offset, 0, size - offset); + } + } + + if (flag_S) { + uint8_t *top = reinterpret_cast<uint8_t *>(fat_header.GetBase()); + size_t size = fat_header.GetSize(); + + char *copy; + asprintf(©, "%s.%s.cp", dir, base); + FILE *file = fopen(copy, "w+"); + size_t writ = fwrite(top, 1, size, file); + _assert(writ == size); + fclose(file); + + _syscall(unlink(temp)); + free(temp); + temp = copy; + } + + if (temp != NULL) { + struct stat info; + _syscall(stat(path, &info)); + _syscall(chown(temp, info.st_uid, info.st_gid)); + _syscall(chmod(temp, info.st_mode)); + _syscall(unlink(path)); + _syscall(rename(temp, path)); + free(temp); + } + + free(dir); + ++filei; + } catch (const char *) { + ++filee; + ++filei; + } + + return filee; +} |