+ 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_;
+ }
+};
+
+class NullBuffer :
+ public std::streambuf
+{
+ public:
+ virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
+ return size;
+ }
+
+ virtual int_type overflow(int_type next) {
+ return next;
+ }
+};
+
+class HashBuffer :
+ public std::streambuf
+{
+ private:
+ std::vector<char> &hash_;
+ SHA_CTX context_;
+
+ public:
+ HashBuffer(std::vector<char> &hash) :
+ hash_(hash)
+ {
+ SHA1_Init(&context_);
+ }
+
+ ~HashBuffer() {
+ hash_.resize(SHA_DIGEST_LENGTH);
+ SHA1_Final(reinterpret_cast<uint8_t *>(hash_.data()), &context_);
+ }
+
+ virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
+ SHA1_Update(&context_, data, size);
+ return size;
+ }
+
+ virtual int_type overflow(int_type next) {
+ if (next == traits_type::eof())
+ return sync();
+ char value(next);
+ xsputn(&value, 1);
+ return next;
+ }
+};
+
+class HashProxy :
+ public HashBuffer
+{
+ private:
+ std::streambuf &buffer_;
+
+ public:
+ HashProxy(std::vector<char> &hash, std::streambuf &buffer) :
+ HashBuffer(hash),
+ buffer_(buffer)
+ {
+ }
+
+ virtual std::streamsize xsputn(const char_type *data, std::streamsize size) {
+ _assert(HashBuffer::xsputn(data, size) == size);
+ return buffer_.sputn(data, size);
+ }
+};
+
+static bool Starts(const std::string &lhs, const std::string &rhs) {
+ return lhs.size() >= rhs.size() && lhs.compare(0, rhs.size(), rhs) == 0;
+}
+
+class Split {
+ public:
+ std::string dir;
+ std::string base;
+
+ Split(const std::string &path) {
+ size_t slash(path.rfind('/'));
+ if (slash == std::string::npos)
+ base = path;
+ else {
+ dir = path.substr(0, slash + 1);
+ base = path.substr(slash + 1);
+ }
+ }
+};
+
+static void mkdir_p(const std::string &path) {
+ if (path.empty())
+ return;
+ if (_syscall(mkdir(path.c_str(), 0755), EEXIST) == -EEXIST)
+ return;
+ auto slash(path.rfind('/', path.size() - 1));
+ if (slash == std::string::npos)
+ return;
+ mkdir_p(path.substr(0, slash));
+}
+
+static std::string Temporary(std::filebuf &file, const Split &split) {
+ std::string temp(split.dir + ".ldid." + split.base);
+ mkdir_p(split.dir);
+ _assert_(file.open(temp.c_str(), std::ios::out | std::ios::trunc | std::ios::binary) == &file, "open(): %s", temp.c_str());
+ return temp;
+}
+
+static void Commit(const std::string &path, const std::string &temp) {
+ struct stat info;
+ if (_syscall(stat(path.c_str(), &info), ENOENT) == 0) {
+#ifndef __WIN32__
+ _syscall(chown(temp.c_str(), info.st_uid, info.st_gid));
+#endif
+ _syscall(chmod(temp.c_str(), info.st_mode));
+ }
+
+ _syscall(rename(temp.c_str(), path.c_str()));
+}
+
+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());
projects / ldid.git / blobdiff