X-Git-Url: https://git.saurik.com/ldid.git/blobdiff_plain/1a982df59e2831119a352833d91e45aee31727ea..7b496abd3d9cbe500279e025860ed8a345d665b4:/ldid.cpp
diff --git a/ldid.cpp b/ldid.cpp
index 6250a7d..384b27c 100644
--- a/ldid.cpp
+++ b/ldid.cpp
@@ -2,18 +2,19 @@
* Copyright (C) 2007-2012 Jay Freeman (saurik)
*/
-/* GNU Lesser General Public License, Version 3 {{{ */
-/* This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
+/* 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
+ * 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 .
**/
/* }}} */
@@ -22,15 +23,15 @@
#include "minimal/string.h"
#include "minimal/mapping.h"
+extern "C" {
#include "sha1.h"
+}
#include
#include
#include
-#include
-#include
-#include
+#include
struct fat_header {
uint32_t magic;
@@ -66,6 +67,7 @@ struct mach_header {
#define MH_DYLDLINK 0x4
+#define MH_OBJECT 0x1
#define MH_EXECUTE 0x2
#define MH_DYLIB 0x6
#define MH_BUNDLE 0x8
@@ -276,6 +278,30 @@ struct encryption_info_command {
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
+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) |
@@ -290,6 +316,13 @@ uint32_t Swap_(uint32_t value) {
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(value));
}
@@ -298,6 +331,10 @@ int32_t Swap_(int32_t value) {
return Swap_(static_cast(value));
}
+int64_t Swap_(int64_t value) {
+ return Swap_(static_cast(value));
+}
+
bool little_(true);
uint16_t Swap(uint16_t value) {
@@ -308,6 +345,10 @@ 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(value));
}
@@ -316,6 +357,10 @@ int32_t Swap(int32_t value) {
return Swap(static_cast(value));
}
+int64_t Swap(int64_t value) {
+ return Swap(static_cast(value));
+}
+
template
class Pointer;
@@ -343,6 +388,10 @@ class Data {
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(value));
}
@@ -351,6 +400,10 @@ class Data {
return Swap(static_cast(value));
}
+ int64_t Swap(int64_t value) const {
+ return Swap(static_cast(value));
+ }
+
void *GetBase() const {
return base_;
}
@@ -408,14 +461,22 @@ class MachHeader :
return mach_header_;
}
+ operator struct mach_header *() const {
+ return mach_header_;
+ }
+
uint32_t GetCPUType() const {
return Swap(mach_header_->cputype);
}
- uint16_t GetCPUSubtype() const {
+ 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;
@@ -442,7 +503,7 @@ class MachHeader :
return segment_commands;
}
- std::vector GetSegments64(const char *segment_name) {
+ std::vector GetSegments64(const char *segment_name) const {
std::vector segment_commands;
_foreach (load_command, GetLoadCommands()) {
@@ -571,6 +632,10 @@ class FatHeader :
struct fat_header *operator ->() const {
return fat_header_;
}
+
+ operator struct fat_header *() const {
+ return fat_header_;
+ }
};
FatHeader Map(const char *path, bool ro = false) {
@@ -661,14 +726,18 @@ void sha1(uint8_t *hash, uint8_t *data, size_t size) {
}
struct CodesignAllocation {
- uint32_t type_;
- uint16_t subtype_;
- size_t size_;
-
- CodesignAllocation(uint32_t type, uint16_t subtype, size_t size) :
- type_(type),
- subtype_(subtype),
- size_(size)
+ 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)
{
}
};
@@ -705,6 +774,8 @@ int main(int argc, const char *argv[]) {
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);
@@ -781,6 +852,10 @@ int main(int argc, const char *argv[]) {
}
} break;
+ case 'I': {
+ flag_I = argv[argi] + 2;
+ } break;
+
case 'n': {
char *arge;
noffset = strtoul(argv[argi] + 2, &arge, 0);
@@ -815,10 +890,19 @@ int main(int argc, const char *argv[]) {
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)); {
@@ -843,7 +927,7 @@ int main(int argc, const char *argv[]) {
_assert(size != _not(uint32_t));
- _foreach (segment, const_cast(mach_header).GetSegments("__LINKEDIT")) {
+ _foreach (segment, mach_header.GetSegments("__LINKEDIT")) {
segment->filesize -= mach_header.GetSize() - size;
if (fat_arch *fat_arch = mach_header.GetFatArch()) {
@@ -853,7 +937,7 @@ int main(int argc, const char *argv[]) {
clip = std::max(clip, size);
}
- _foreach (segment, const_cast(mach_header).GetSegments64("__LINKEDIT")) {
+ _foreach (segment, mach_header.GetSegments64("__LINKEDIT")) {
segment->filesize -= mach_header.GetSize() - size;
if (fat_arch *fat_arch = mach_header.GetFatArch()) {
@@ -865,19 +949,27 @@ int main(int argc, const char *argv[]) {
}
}
- _assert(clip != 0);
- _syscall(truncate(path, clip));
+ if (clip != 0)
+ _syscall(truncate(path, clip));
}
if (flag_S) {
- asprintf(&temp, "%s.%s.cs", dir, base);
- const char *allocate = getenv("CODESIGN_ALLOCATE");
- if (allocate == NULL)
- allocate = "codesign_allocate";
+ 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 allocations; {
- FatHeader fat_header(Map(path));
- _foreach (mach_header, fat_header.GetMachHeaders()) {
+ _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)); {
@@ -895,31 +987,6 @@ int main(int argc, const char *argv[]) {
size = mach_header.GetSize();
}
- allocations.push_back(CodesignAllocation(mach_header.GetCPUType(), mach_header.GetCPUSubtype(), size));
- }
- }
-
- pid_t pid = fork();
- _syscall(pid);
- if (pid == 0) {
- // XXX: this leaks memory, but it doesn't really matter
- std::vector args;
- char *arg;
-
- args.push_back(allocate);
-
- args.push_back("-i");
- args.push_back(path);
-
- _foreach (allocation, allocations) {
- args.push_back("-A");
-
- asprintf(&arg, "%u", allocation.type_);
- args.push_back(arg);
-
- asprintf(&arg, "%u", allocation.subtype_);
- args.push_back(arg);
-
size_t alloc(0);
alloc += sizeof(struct SuperBlob);
uint32_t special(0);
@@ -927,7 +994,7 @@ int main(int argc, const char *argv[]) {
special = std::max(special, CSSLOT_CODEDIRECTORY);
alloc += sizeof(struct BlobIndex);
alloc += sizeof(struct CodeDirectory);
- alloc += strlen(base) + 1;
+ alloc += strlen(name) + 1;
special = std::max(special, CSSLOT_REQUIREMENTS);
alloc += sizeof(struct BlobIndex);
@@ -940,46 +1007,98 @@ int main(int argc, const char *argv[]) {
alloc += xmls;
}
- size_t normal((allocation.size_ + 0x1000 - 1) / 0x1000);
- alloc += (special + normal) * 0x14;
+ size_t normal((size + 0x1000 - 1) / 0x1000);
+ alloc = Align(alloc + (special + normal) * 0x14, 16);
- alloc += 15;
- alloc /= 16;
- alloc *= 16;
+ auto *fat_arch(mach_header.GetFatArch());
+ uint32_t align(fat_arch == NULL ? 0 : source.Swap(fat_arch->align));
+ offset = Align(offset, 1 << align);
- asprintf(&arg, "%zu", alloc);
- args.push_back(arg);
+ allocations.push_back(CodesignAllocation(mach_header, offset, size, alloc, align));
+ offset += size + alloc;
+ offset = Align(offset, 16);
}
+ }
- args.push_back("-o");
- args.push_back(temp);
+ 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 {
+ auto *fat_header(reinterpret_cast(file));
+ fat_header->magic = Swap(FAT_MAGIC);
+ fat_header->nfat_arch = Swap(source.Swap(source->nfat_arch));
+ fat_arch = reinterpret_cast(fat_header + 1);
+ }
- args.push_back(NULL);
+ _foreach (allocation, allocations) {
+ auto &source(allocation.mach_header_);
- if (false) {
- printf("run:");
- _foreach (arg, args)
- printf(" %s", arg);
- printf("\n");
+ 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;
}
- execvp(allocate, (char **) &args[0]);
- _assert(false);
- }
+ void *target(reinterpret_cast(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(load_command);
+ break;
+ }
+
+ if (signature == NULL) {
+ mach_header->ncmds = mach_header.Swap(mach_header.Swap(mach_header->ncmds) + 1);
+ signature = reinterpret_cast(reinterpret_cast(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_);
- int status;
- _syscall(waitpid(pid, &status, 0));
- _assert(WIFEXITED(status));
- _assert(WEXITSTATUS(status) == 0);
+ _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)));
+ 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()) {
+ struct encryption_info_command *encryption(NULL);
+
if (flag_A) {
if (mach_header.GetCPUType() != flag_CPUType)
continue;
@@ -1026,6 +1145,8 @@ int main(int argc, const char *argv[]) {
load_command->cmd = mach_header.Swap(LC_LOAD_DYLIB);
else if (cmd == LC_CODE_SIGNATURE)
signature = reinterpret_cast(load_command);
+ else if (cmd == LC_ENCRYPTION_INFO)
+ encryption = reinterpret_cast(load_command);
else if (cmd == LC_UUID) {
volatile struct uuid_command *uuid_command(reinterpret_cast(load_command));
@@ -1055,18 +1176,20 @@ int main(int argc, const char *argv[]) {
dylib_command->dylib.timestamp = mach_header.Swap(timed);
}
- } else if (cmd == LC_ENCRYPTION_INFO) {
- volatile struct encryption_info_command *encryption_info_command(reinterpret_cast(load_command));
+ }
+ }
- if (flag_D)
- encryption_info_command->cryptid = mach_header.Swap(0);
+ if (flag_d) {
+ _assert(encryption != NULL);
- 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));
- }
- }
+ printf("cryptoff=0x%x\n", mach_header.Swap(encryption->cryptoff));
+ printf("cryptsize=0x%x\n", mach_header.Swap(encryption->cryptsize));
+ printf("cryptid=0x%x\n", mach_header.Swap(encryption->cryptid));
+ }
+
+ if (flag_D) {
+ _assert(encryption != NULL);
+ encryption->cryptid = mach_header.Swap(0);
}
if (flag_e) {
@@ -1143,8 +1266,8 @@ int main(int argc, const char *argv[]) {
directory->spare2 = Swap(uint32_t(0));
directory->identOffset = Swap(offset - begin);
- strcpy(reinterpret_cast(blob + offset), base);
- offset += strlen(base) + 1;
+ strcpy(reinterpret_cast(blob + offset), name);
+ offset += strlen(name) + 1;
uint32_t special = xmld == NULL ? CSSLOT_REQUIREMENTS : CSSLOT_ENTITLEMENTS;
directory->nSpecialSlots = Swap(special);