/* ldid - (Mach-O) Link-Loader Identity Editor
- * Copyright (C) 2007-2012 Jay Freeman (saurik)
+ * Copyright (C) 2007-2015 Jay Freeman (saurik)
*/
/* GNU Affero General Public License, Version 3 {{{ */
**/
/* }}} */
-#include "minimal/stdlib.h"
-
+#include <cstdio>
+#include <cstdlib>
#include <cstring>
+#include <fstream>
+#include <map>
+#include <sstream>
#include <string>
#include <vector>
-#include <dlfcn.h>
+#include <errno.h>
#include <fcntl.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
+#include <openssl/err.h>
+#include <openssl/pem.h>
+#include <openssl/pkcs7.h>
+#include <openssl/pkcs12.h>
#include <openssl/sha.h>
#include <plist/plist.h>
+#include "ldid.hpp"
+
+#define _assert___(line) \
+ #line
+#define _assert__(line) \
+ _assert___(line)
+
+#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)
+
+#define _assert(expr) \
+ _assert_(expr, "%s", #expr)
+
+#define _syscall(expr) ({ \
+ __typeof__(expr) _value; \
+ do if ((long) (_value = (expr)) != -1) \
+ break; \
+ else switch (errno) { \
+ case EINTR: \
+ continue; \
+ default: \
+ _assert_(false, "errno=%u", errno); \
+ } while (true); \
+ _value; \
+})
+
+#define _trace() \
+ fprintf(stderr, "_trace(%s:%u): %s\n", __FILE__, __LINE__, __FUNCTION__)
+
+#define _not(type) \
+ ((type) ~ (type) 0)
+
+#define _packed \
+ __attribute__((packed))
+
+template <typename Type_>
+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)
+
struct fat_header {
uint32_t magic;
uint32_t nfat_arch;
#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;
#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<char *>(data), size) == size);
+}
+
+inline void put(std::streambuf &stream, const void *data, size_t size) {
+ _assert(stream.sputn(static_cast<const char *>(data), size) == size);
+}
+
+inline void pad(std::streambuf &stream, size_t size) {
+ char padding[size];
+ memset(padding, 0, size);
+ put(stream, padding, size);
+}
+
template <typename Type_>
Type_ Align(Type_ value, size_t align) {
value += align - 1;
return value;
}
-uint16_t Swap_(uint16_t 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);
}
-uint32_t Swap_(uint32_t value) {
+static inline uint32_t Swap_(uint32_t value) {
value = ((value >> 8) & 0x00ff00ff) |
((value << 8) & 0xff00ff00);
value = ((value >> 16) & 0x0000ffff) |
return value;
}
-uint64_t Swap_(uint64_t 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;
}
-int16_t Swap_(int16_t value) {
+static inline int16_t Swap_(int16_t value) {
return Swap_(static_cast<uint16_t>(value));
}
-int32_t Swap_(int32_t value) {
+static inline int32_t Swap_(int32_t value) {
return Swap_(static_cast<uint32_t>(value));
}
-int64_t Swap_(int64_t value) {
+static inline int64_t Swap_(int64_t value) {
return Swap_(static_cast<uint64_t>(value));
}
-bool little_(true);
+static bool little_(true);
-uint16_t Swap(uint16_t value) {
+static inline uint16_t Swap(uint16_t value) {
return little_ ? Swap_(value) : value;
}
-uint32_t Swap(uint32_t value) {
+static inline uint32_t Swap(uint32_t value) {
return little_ ? Swap_(value) : value;
}
-uint64_t Swap(uint64_t value) {
+static inline uint64_t Swap(uint64_t value) {
return little_ ? Swap_(value) : value;
}
-int16_t Swap(int16_t value) {
+static inline int16_t Swap(int16_t value) {
return Swap(static_cast<uint16_t>(value));
}
-int32_t Swap(int32_t value) {
+static inline int32_t Swap(int32_t value) {
return Swap(static_cast<uint32_t>(value));
}
-int64_t Swap(int64_t value) {
+static inline 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_;
-
+class Swapped {
protected:
bool swapped_;
- public:
- Data(void *base, size_t size) :
- base_(base),
- size_(size),
+ Swapped() :
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;
+ public:
+ Swapped(bool swapped) :
+ swapped_(swapped)
+ {
}
- uint64_t Swap(uint64_t value) const {
+ template <typename Type_>
+ Type_ Swap(Type_ 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));
- }
+class Data :
+ public Swapped
+{
+ private:
+ void *base_;
+ size_t size_;
- int64_t Swap(int64_t value) const {
- return Swap(static_cast<uint64_t>(value));
+ public:
+ Data(void *base, size_t size) :
+ base_(base),
+ size_(size)
+ {
}
void *GetBase() const {
);
}
+ bool Bits64() const {
+ return bits64_;
+ }
+
struct mach_header *operator ->() const {
return mach_header_;
}
}
};
-#define CSMAGIC_CODEDIRECTORY uint32_t(0xfade0c02)
-#define CSMAGIC_EMBEDDED_SIGNATURE uint32_t(0xfade0cc0)
-#define CSMAGIC_ENTITLEMENTS uint32_t(0xfade7171)
+#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 CSSLOT_CODEDIRECTORY uint32_t(0)
-#define CSSLOT_REQUIREMENTS uint32_t(2)
-#define CSSLOT_ENTITLEMENTS uint32_t(5)
+#define CS_HASHTYPE_SHA1 1
struct BlobIndex {
uint32_t type;
} _packed;
struct CodeDirectory {
- struct Blob blob;
uint32_t version;
uint32_t flags;
uint32_t hashOffset;
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);
+static void sha1(uint8_t *hash, const void *data, size_t size) {
+ SHA1(static_cast<const uint8_t *>(data), size, hash);
}
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 alloc, size_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)
{
void open(const char *path, int flags) {
_assert(file_ == -1);
- _syscall(file_ = ::open(path, flags));
+ file_ = _syscall(::open(path, flags));
}
int file() const {
clear();
}
+ bool empty() const {
+ return data_ == NULL;
+ }
+
void open(const char *path, int oflag, int pflag, int mflag) {
clear();
_syscall(fstat(file, &stat));
size_ = stat.st_size;
- _syscall(data_ = mmap(NULL, size_, pflag, mflag, file, 0));
+ data_ = _syscall(mmap(NULL, size_, pflag, mflag, file, 0));
}
void open(const char *path, bool edit) {
size_t size() const {
return size_;
}
+
+ operator std::string() const {
+ return std::string(static_cast<char *>(data_), size_);
+ }
+};
+
+namespace ldid {
+
+static void Allocate(const void *idata, size_t isize, std::streambuf &output, const Functor<size_t (size_t)> &allocate, const Functor<size_t (std::streambuf &output, size_t, const std::string &, const char *)> &save) {
+ FatHeader source(const_cast<void *>(idata), isize);
+
+ 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(allocate(size));
+
+ auto *fat_arch(mach_header.GetFatArch());
+ uint32_t align(fat_arch == NULL ? 0 : source.Swap(fat_arch->align));
+ 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<std::string> commands;
+
+ _foreach (load_command, mach_header.GetLoadCommands()) {
+ std::string copy(reinterpret_cast<const char *>(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<struct segment_command *>(©[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, PageSize_);
+ } break;
+
+ case LC_SEGMENT_64: {
+ auto segment_command(reinterpret_cast<struct segment_command_64 *>(©[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, PageSize_);
+ } 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<const char *>(&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<char *>(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<uint32_t, std::string> 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<char *>(&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;
+}
+
+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<char *>(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_;
+ }
};
-int main(int argc, const char *argv[]) {
+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) * SHA_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 + SHA_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 = SHA_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][SHA_DIGEST_LENGTH];
+ uint8_t (*hashes)[SHA_DIGEST_LENGTH] = storage + special;
+
+ memset(storage, 0, sizeof(*storage) * special);
+
+ _foreach (blob, blobs) {
+ auto local(reinterpret_cast<const Blob *>(&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);
+ }
+
+ 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);
+ }
+
+ return put(output, CSMAGIC_EMBEDDED_SIGNATURE, blobs);
+ }));
+}
+
+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;
+ }));
+}
+
+}
+
+int main(int argc, char *argv[]) {
+ OpenSSL_add_all_algorithms();
+
union {
uint16_t word;
uint8_t byte[2];
bool timeh(false);
uint32_t timev(0);
- Map xmlm;
- const void *xmld(NULL);
- size_t xmls(0);
+ Map entitlements;
+ Map key;
+ ldid::Slots slots;
std::vector<std::string> files;
if (argv[argi][0] != '-')
files.push_back(argv[argi]);
else switch (argv[argi][1]) {
- case 'r': flag_r = true; break;
+ 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);
+ std::string &hash(slots[number]);
+ hash.resize(SHA_DIGEST_LENGTH);
+ sha1(reinterpret_cast<uint8_t *>(&hash[0]), 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;
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;
- xmlm.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
- xmld = xmlm.data();
- xmls = xmlm.size();
+ entitlements.open(xml, O_RDONLY, PROT_READ, MAP_PRIVATE);
}
break;
+ case 'K':
+ key.open(argv[argi] + 2, O_RDONLY, PROT_READ, MAP_PRIVATE);
+ break;
+
case 'T': {
flag_T = true;
if (argv[argi][2] == '-')
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 {
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) {
- 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 (!flag_r) {
- 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;
- }
+ Map input(path, O_RDONLY, PROT_READ, MAP_PRIVATE);
- 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);
+ std::string dir;
+ const char *base = strrchr(path, '/');
- allocations.push_back(CodesignAllocation(mach_header, offset, size, alloc, align));
- offset += size + alloc;
- offset = Align(offset, 16);
- }
+ if (base != NULL)
+ dir.assign(path, base++ - path + 1);
+ else
+ base = path;
- asprintf(&temp, "%s.%s.cs", dir.c_str(), base);
- fclose(fopen(temp, "w+"));
- _syscall(truncate(temp, offset));
+ std::string temp(dir + "." + base + ".cs");
+ std::filebuf output;
+ _assert(output.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &output);
- 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;
+ if (flag_r)
+ ldid::Unsign(input.data(), input.size(), output);
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);
+ std::string identifier(flag_I ?: base);
+ ldid::Sign(input.data(), input.size(), output, identifier, entitlements, key, slots);
}
- _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;
- }
-
- if (flag_r && 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 (flag_S) {
- 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_);
- }
-
- _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);
- }
- }
+ struct stat info;
+ _syscall(stat(path, &info));
+#ifndef __WIN32__
+ _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
+#endif
+ _syscall(chmod(temp.c_str(), info.st_mode));
+ _syscall(unlink(path));
+ _syscall(rename(temp.c_str(), path));
}
- Map mapping(temp ?: path, flag_T || flag_s || flag_S);
+ Map mapping(path, flag_T || flag_s);
FatHeader fat_header(mapping.data(), mapping.size());
_foreach (mach_header, fat_header.GetMachHeaders()) {
if (false);
else if (cmd == LC_CODE_SIGNATURE)
signature = reinterpret_cast<struct linkedit_data_command *>(load_command);
- else if (cmd == LC_ENCRYPTION_INFO)
+ 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 (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);
+ fwrite(entitlements + 1, 1, Swap(entitlements->length) - sizeof(*entitlements), stdout);
}
}
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));
+ uint8_t (*hashes)[SHA_DIGEST_LENGTH] = reinterpret_cast<uint8_t (*)[SHA_DIGEST_LENGTH]>(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);
+ sha1(hashes[i], top + PageSize_ * i, PageSize_);
if (pages != 0)
- sha1(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 = 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 = xmld == NULL ? 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 (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);
- sha1((uint8_t *) (hashes - type), (uint8_t *) local, Swap(local->length));
+ sha1(hashes[pages - 1], top + PageSize_ * (pages - 1), ((data - 1) % PageSize_) + 1);
}
- }
-
- 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 (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