-/* JocStrap - Java/Objective-C Bootstrap
- * Copyright (C) 2007 Jay Freeman (saurik)
+/* ldid - (Mach-O) Link-Loader Identity Editor
+ * Copyright (C) 2007-2012 Jay Freeman (saurik)
*/
+/* GNU Affero General Public License, Version 3 {{{ */
/*
- * Redistribution and use in source and binary
- * forms, with or without modification, are permitted
- * provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the
- * above copyright notice, this list of conditions
- * and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the
- * above copyright notice, this list of conditions
- * and the following disclaimer in the documentation
- * and/or other materials provided with the
- * distribution.
- * 3. The name of the author may not be used to endorse
- * or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
+ * 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/mapping.h"
#include <cstring>
#include <string>
#include <vector>
+#include <dlfcn.h>
+#include <fcntl.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include <openssl/sha.h>
+
+#include <plist/plist.h>
+
struct fat_header {
uint32_t magic;
uint32_t nfat_arch;
-};
+} _packed;
#define FAT_MAGIC 0xcafebabe
#define FAT_CIGAM 0xbebafeca
uint32_t offset;
uint32_t size;
uint32_t align;
-};
+} _packed;
struct mach_header {
uint32_t magic;
uint32_t ncmds;
uint32_t sizeofcmds;
uint32_t flags;
-};
+} _packed;
-#define MH_MAGIC 0xfeedface
+#define MH_MAGIC 0xfeedface
#define MH_CIGAM 0xcefaedfe
-#define MH_EXECUTE 0x2
-#define MH_DYLIB 0x6
-#define MH_BUNDLE 0x8
+#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 0x80000000
+#define LC_REQ_DYLD uint32_t(0x80000000)
-#define LC_LOAD_DYLIB 0x0c
-#define LC_ID_DYLIB 0x0d
-#define LC_UUID 0x1b
-#define LC_REEXPORT_DYLIB (0x1f | LC_REQ_DYLD)
+#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)
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;
-class Framework {
+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 & 0x00000000ffffffff) << 32 | (value & 0xffffffff00000000) >> 32;
+ value = (value & 0x0000ffff0000ffff) << 16 | (value & 0xffff0000ffff0000) >> 16;
+ value = (value & 0x00ff00ff00ff00ff) << 8 | (value & 0xff00ff00ff00ff00) >> 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_;
- mach_header *mach_header_;
+
+ 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));
}
return Swap(static_cast<uint32_t>(value));
}
- uint16_t Swap(uint16_t value) const {
- return !swapped_ ? value :
- ((value >> 8) & 0x00ff) |
- ((value << 8) & 0xff00);
+ int64_t Swap(int64_t value) const {
+ return Swap(static_cast<uint64_t>(value));
}
- uint32_t Swap(uint32_t value) const {
- if (!swapped_)
- return value;
- else {
- value = ((value >> 8) & 0x00ff00ff) |
- ((value << 8) & 0xff00ff00);
- value = ((value >> 16) & 0x0000ffff) |
- ((value << 16) & 0xffff0000);
- return value;
- }
+ void *GetBase() const {
+ return base_;
}
- Framework(const char *framework_path) :
- swapped_(false)
+ 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)
{
- base_ = map(framework_path, 0, _not(size_t), &size_, false);
- fat_header *fat_header = reinterpret_cast<struct fat_header *>(base_);
+ mach_header_ = (mach_header *) base;
- if (Swap(fat_header->magic) == FAT_CIGAM) {
- swapped_ = !swapped_;
- goto fat;
- } else if (Swap(fat_header->magic) != FAT_MAGIC)
- mach_header_ = (mach_header *) base_;
- 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);
- mach_header_ = (mach_header *) ((uint8_t *) base_ + arch_offset);
- goto found;
- ++fat_arch;
- }
+ switch (Swap(mach_header_->magic)) {
+ case MH_CIGAM:
+ swapped_ = !swapped_;
+ case MH_MAGIC:
+ bits64_ = false;
+ break;
- _assert(false);
+ case MH_CIGAM_64:
+ swapped_ = !swapped_;
+ case MH_MAGIC_64:
+ bits64_ = true;
+ break;
+
+ default:
+ _assert(false);
}
- found:
- if (Swap(mach_header_->magic) == MH_CIGAM)
- swapped_ = !swapped_;
- else _assert(Swap(mach_header_->magic) == MH_MAGIC);
+ 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 ||
);
}
- void *GetBase() {
- return base_;
+ struct mach_header *operator ->() const {
+ return mach_header_;
}
- size_t GetSize() {
- return size_;
+ operator struct mach_header *() const {
+ return mach_header_;
}
- std::vector<struct load_command *> GetLoadCommands() {
+ 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 = reinterpret_cast<struct load_command *>(mach_header_ + 1);
+ 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_;
+ }
+};
+
+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 sha1(uint8_t *hash, uint8_t *data, size_t size) {
+ SHA1(data, size, 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)
+ {
+ }
+};
+
+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);
+ _syscall(file_ = ::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 char *path, int oflag, int pflag, int mflag) :
+ Map()
+ {
+ open(path, oflag, pflag, mflag);
+ }
+
+ Map(const char *path, bool edit) :
+ Map()
+ {
+ open(path, edit);
+ }
+
+ ~Map() {
+ clear();
+ }
+
+ void open(const char *path, int oflag, int pflag, int mflag) {
+ clear();
+
+ file_.open(path, oflag);
+ int file(file_.file());
+
+ struct stat stat;
+ _syscall(fstat(file, &stat));
+ size_ = stat.st_size;
+
+ _syscall(data_ = mmap(NULL, size_, pflag, mflag, file, 0));
+ }
+
+ void open(const char *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<char *>(data_), size_);
+ }
+};
+
+void resign(const char *path, const char *temp, const char *name, const std::string &xml) {
+ Map input(path, O_RDONLY, PROT_READ | PROT_WRITE, MAP_PRIVATE);
+ FatHeader source(input.data(), input.size());
+
+ 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()) {
+ 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<struct linkedit_data_command *>(load_command);
+ else if (cmd == LC_SYMTAB)
+ symtab = reinterpret_cast<struct symtab_command *>(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(0);
+ if (name != NULL) {
+ 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 (xml.size() != 0) {
+ special = std::max(special, CSSLOT_ENTITLEMENTS);
+ alloc += sizeof(struct BlobIndex);
+ alloc += sizeof(struct Blob);
+ alloc += xml.size();
+ }
+
+ size_t normal((size + 0x1000 - 1) / 0x1000);
+ alloc = Align(alloc + (special + normal) * 0x14, 16);
+ }
+
+ auto *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);
+ }
+
+ fclose(fopen(temp, "w+"));
+ _syscall(truncate(temp, offset));
+
+ Map output(temp, O_RDWR, PROT_READ | PROT_WRITE, MAP_SHARED);
+ _assert(output.size() == offset);
+ void *file(output.data());
+ memset(file, 0, offset);
+
+ fat_arch *fat_arch;
+ if (!source.IsFat())
+ fat_arch = NULL;
+ else {
+ auto *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) {
+ auto &source(allocation.mach_header_);
+
+ uint32_t align(allocation.size_);
+ if (allocation.alloc_ != 0)
+ 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;
+ }
+
+ _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 (name == NULL && signature != NULL) {
+ auto before(reinterpret_cast<uint8_t *>(mach_header.GetLoadCommand()));
+ auto after(reinterpret_cast<uint8_t *>(signature));
+ auto next(mach_header.Swap(signature->cmdsize));
+ auto total(mach_header.Swap(mach_header->sizeofcmds));
+ memmove(signature, after + next, before + total - after - next);
+ memset(before + total - next, 0, next);
+ mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) - 1);
+ mach_header->sizeofcmds = mach_header.Swap(total - next);
+ signature = NULL;
+ }
+
+ if (name != NULL) {
+ if (signature == NULL) {
+ signature = reinterpret_cast<struct linkedit_data_command *>(reinterpret_cast<uint8_t *>(mach_header.GetLoadCommand()) + mach_header.Swap(mach_header->sizeofcmds));
+ signature->cmd = mach_header.Swap(LC_CODE_SIGNATURE);
+ signature->cmdsize = mach_header.Swap(uint32_t(sizeof(*signature)));
+ mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) + 1);
+ mach_header->sizeofcmds = mach_header.Swap(mach_header.Swap(mach_header->sizeofcmds) + uint32_t(sizeof(*signature)));
+ }
+
+ signature->dataoff = mach_header.Swap(align);
+ signature->datasize = mach_header.Swap(allocation.alloc_);
+
+ 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 = xml.size() == 0 ? 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 = 0x14;
+ directory->hashType = 0x01;
+ 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 = xml.size() == 0 ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS;
+ directory->nSpecialSlots = Swap(special);
+
+ uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(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)
+ sha1(hashes[i], top + 0x1000 * i, 0x1000);
+ if (pages != 0)
+ sha1(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 (xml.size() != 0) {
+ 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, xml.data(), xml.size());
+ offset += xml.size();
+
+ 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);
+ sha1((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);
+ }
+ }
+}
+
int main(int argc, const char *argv[]) {
- bool flag_R(false);
- bool flag_t(false);
- bool flag_p(false);
- bool flag_u(false);
+ union {
+ uint16_t word;
+ uint8_t byte[2];
+ } endian = {1};
+
+ little_ = endian.byte[0];
+
+ bool flag_r(false);
+ bool flag_e(false);
bool flag_T(false);
+ bool flag_S(false);
+ bool flag_s(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);
+ Map xmlm;
+
std::vector<std::string> files;
- _assert(argc != 0);
+ 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 't': flag_t = true; break;
- case 'u': flag_u = true; break;
- case 'p': flag_p = true; break;
+ case 'r': flag_r = true; break;
+ case 'e': flag_e = 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;
+ xmlm.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
+ }
+ break;
case 'T': {
flag_T = true;
}
} break;
+ case 'I': {
+ flag_I = argv[argi] + 2;
+ } break;
+
default:
goto usage;
break;
}
+ _assert(!flag_S || !flag_r);
+
if (files.empty()) usage: {
exit(0);
}
size_t filei(0), filee(0);
_foreach (file, files) try {
- Framework framework(file->c_str());
-
- if (flag_p)
- printf("path%zu='%s'\n", filei, file->c_str());
-
- _foreach (load_command, framework.GetLoadCommands()) {
- uint32_t cmd(framework.Swap((*load_command)->cmd));
-
- if (flag_R && cmd == LC_REEXPORT_DYLIB)
- (*load_command)->cmd = framework.Swap(LC_LOAD_DYLIB);
- 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]
- );
+ const char *path(file.c_str());
+ const char *base = strrchr(path, '/');
+
+ std::string dir;
+ if (base != NULL)
+ dir.assign(path, base++ - path + 1);
+ else
+ base = path;
+
+ const char *name(flag_I ?: base);
+ char *temp(NULL);
+
+ if (flag_S || flag_r) {
+ asprintf(&temp, "%s.%s.cs", dir.c_str(), base);
+ resign(path, temp, flag_S ? name : NULL, xmlm);
+ }
+
+ Map mapping(temp ?: path, flag_T || flag_s);
+ 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<struct linkedit_data_command *>(load_command);
+ else if (cmd == LC_ENCRYPTION_INFO || cmd == LC_ENCRYPTION_INFO_64)
+ encryption = reinterpret_cast<struct encryption_info_command *>(load_command);
+ else if (cmd == LC_ID_DYLIB) {
+ volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(load_command));
+
+ 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_ID_DYLIB) {
- volatile struct dylib_command *dylib_command(reinterpret_cast<struct dylib_command *>(*load_command));
+ }
+
+ if (flag_D) {
+ _assert(encryption != NULL);
+ encryption->cryptid = mach_header.Swap(0);
+ }
+
+ if (flag_e) {
+ _assert(signature != NULL);
- if (flag_t)
- printf("time%zu=0x%.8x\n", filei, framework.Swap(dylib_command->dylib.timestamp));
+ uint32_t data = mach_header.Swap(signature->dataoff);
- if (flag_T) {
- uint32_t timed;
+ uint8_t *top = reinterpret_cast<uint8_t *>(mach_header.GetBase());
+ uint8_t *blob = top + data;
+ struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
- if (!timeh)
- timed = timev;
- else {
- dylib_command->dylib.timestamp = 0;
- timed = hash(reinterpret_cast<uint8_t *>(framework.GetBase()), framework.GetSize(), timev);
+ 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);
}
+ }
- dylib_command->dylib.timestamp = framework.Swap(timed);
- }
+ 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)[20] = reinterpret_cast<uint8_t (*)[20]>(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 + 0x1000 * i, 0x1000);
+ if (pages != 0)
+ sha1(hashes[pages - 1], top + 0x1000 * (pages - 1), ((data - 1) % 0x1000) + 1);
+ }
}
}
+ 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);
+ }
+
++filei;
} catch (const char *) {
++filee;
projects / ldid.git / blobdiff