From f043eabdd84a509abf5266bb444d19af3e26b7c6 Mon Sep 17 00:00:00 2001 From: bruvzg <7645683+bruvzg@users.noreply.github.com> Date: Tue, 28 Apr 2020 20:51:29 +0300 Subject: Adds PCK encryption support (using script encryption key for export). Change default encryption mode from ECB to CFB. --- core/crypto/crypto_core.cpp | 20 +++- core/crypto/crypto_core.h | 2 + core/io/file_access_encrypted.cpp | 73 +++++++++------ core/io/file_access_encrypted.h | 9 +- core/io/file_access_pack.cpp | 65 ++++++++++++- core/io/file_access_pack.h | 14 ++- core/io/file_access_zip.cpp | 2 +- core/io/pck_packer.cpp | 191 +++++++++++++++++++++++++++++--------- core/io/pck_packer.h | 14 ++- 9 files changed, 300 insertions(+), 90 deletions(-) (limited to 'core') diff --git a/core/crypto/crypto_core.cpp b/core/crypto/crypto_core.cpp index b0dc47e655..117e47d538 100644 --- a/core/crypto/crypto_core.cpp +++ b/core/crypto/crypto_core.cpp @@ -140,13 +140,19 @@ Error CryptoCore::AESContext::encrypt_ecb(const uint8_t p_src[16], uint8_t r_dst return ret ? FAILED : OK; } -Error CryptoCore::AESContext::decrypt_ecb(const uint8_t p_src[16], uint8_t r_dst[16]) { - int ret = mbedtls_aes_crypt_ecb((mbedtls_aes_context *)ctx, MBEDTLS_AES_DECRYPT, p_src, r_dst); +Error CryptoCore::AESContext::encrypt_cbc(size_t p_length, uint8_t r_iv[16], const uint8_t *p_src, uint8_t *r_dst) { + int ret = mbedtls_aes_crypt_cbc((mbedtls_aes_context *)ctx, MBEDTLS_AES_ENCRYPT, p_length, r_iv, p_src, r_dst); return ret ? FAILED : OK; } -Error CryptoCore::AESContext::encrypt_cbc(size_t p_length, uint8_t r_iv[16], const uint8_t *p_src, uint8_t *r_dst) { - int ret = mbedtls_aes_crypt_cbc((mbedtls_aes_context *)ctx, MBEDTLS_AES_ENCRYPT, p_length, r_iv, p_src, r_dst); +Error CryptoCore::AESContext::encrypt_cfb(size_t p_length, uint8_t p_iv[16], const uint8_t *p_src, uint8_t *r_dst) { + size_t iv_off = 0; // Ignore and assume 16-byte alignment. + int ret = mbedtls_aes_crypt_cfb128((mbedtls_aes_context *)ctx, MBEDTLS_AES_ENCRYPT, p_length, &iv_off, p_iv, p_src, r_dst); + return ret ? FAILED : OK; +} + +Error CryptoCore::AESContext::decrypt_ecb(const uint8_t p_src[16], uint8_t r_dst[16]) { + int ret = mbedtls_aes_crypt_ecb((mbedtls_aes_context *)ctx, MBEDTLS_AES_DECRYPT, p_src, r_dst); return ret ? FAILED : OK; } @@ -155,6 +161,12 @@ Error CryptoCore::AESContext::decrypt_cbc(size_t p_length, uint8_t r_iv[16], con return ret ? FAILED : OK; } +Error CryptoCore::AESContext::decrypt_cfb(size_t p_length, uint8_t p_iv[16], const uint8_t *p_src, uint8_t *r_dst) { + size_t iv_off = 0; // Ignore and assume 16-byte alignment. + int ret = mbedtls_aes_crypt_cfb128((mbedtls_aes_context *)ctx, MBEDTLS_AES_DECRYPT, p_length, &iv_off, p_iv, p_src, r_dst); + return ret ? FAILED : OK; +} + // CryptoCore String CryptoCore::b64_encode_str(const uint8_t *p_src, int p_src_len) { int b64len = p_src_len / 3 * 4 + 4 + 1; diff --git a/core/crypto/crypto_core.h b/core/crypto/crypto_core.h index 82df9c23a8..9ab2871caa 100644 --- a/core/crypto/crypto_core.h +++ b/core/crypto/crypto_core.h @@ -88,6 +88,8 @@ public: Error decrypt_ecb(const uint8_t p_src[16], uint8_t r_dst[16]); Error encrypt_cbc(size_t p_length, uint8_t r_iv[16], const uint8_t *p_src, uint8_t *r_dst); Error decrypt_cbc(size_t p_length, uint8_t r_iv[16], const uint8_t *p_src, uint8_t *r_dst); + Error encrypt_cfb(size_t p_length, uint8_t p_iv[16], const uint8_t *p_src, uint8_t *r_dst); + Error decrypt_cfb(size_t p_length, uint8_t p_iv[16], const uint8_t *p_src, uint8_t *r_dst); }; static String b64_encode_str(const uint8_t *p_src, int p_src_len); diff --git a/core/io/file_access_encrypted.cpp b/core/io/file_access_encrypted.cpp index 5938914cb0..eb684f457e 100644 --- a/core/io/file_access_encrypted.cpp +++ b/core/io/file_access_encrypted.cpp @@ -37,52 +37,54 @@ #include -#define COMP_MAGIC 0x43454447 - -Error FileAccessEncrypted::open_and_parse(FileAccess *p_base, const Vector &p_key, Mode p_mode) { +Error FileAccessEncrypted::open_and_parse(FileAccess *p_base, const Vector &p_key, Mode p_mode, bool p_with_magic) { ERR_FAIL_COND_V_MSG(file != nullptr, ERR_ALREADY_IN_USE, "Can't open file while another file from path '" + file->get_path_absolute() + "' is open."); ERR_FAIL_COND_V(p_key.size() != 32, ERR_INVALID_PARAMETER); pos = 0; eofed = false; + use_magic = p_with_magic; if (p_mode == MODE_WRITE_AES256) { data.clear(); writing = true; file = p_base; - mode = p_mode; key = p_key; } else if (p_mode == MODE_READ) { writing = false; key = p_key; - uint32_t magic = p_base->get_32(); - ERR_FAIL_COND_V(magic != COMP_MAGIC, ERR_FILE_UNRECOGNIZED); - mode = Mode(p_base->get_32()); - ERR_FAIL_INDEX_V(mode, MODE_MAX, ERR_FILE_CORRUPT); - ERR_FAIL_COND_V(mode == 0, ERR_FILE_CORRUPT); + if (use_magic) { + uint32_t magic = p_base->get_32(); + ERR_FAIL_COND_V(magic != ENCRYPTED_HEADER_MAGIC, ERR_FILE_UNRECOGNIZED); + } unsigned char md5d[16]; p_base->get_buffer(md5d, 16); length = p_base->get_64(); + + unsigned char iv[16]; + for (int i = 0; i < 16; i++) { + iv[i] = p_base->get_8(); + } + base = p_base->get_position(); ERR_FAIL_COND_V(p_base->get_len() < base + length, ERR_FILE_CORRUPT); uint32_t ds = length; if (ds % 16) { ds += 16 - (ds % 16); } - data.resize(ds); uint32_t blen = p_base->get_buffer(data.ptrw(), ds); ERR_FAIL_COND_V(blen != ds, ERR_FILE_CORRUPT); - CryptoCore::AESContext ctx; - ctx.set_decode_key(key.ptrw(), 256); + { + CryptoCore::AESContext ctx; - for (size_t i = 0; i < ds; i += 16) { - ctx.decrypt_ecb(&data.write[i], &data.write[i]); + ctx.set_encode_key(key.ptrw(), 256); // Due to the nature of CFB, same key schedule is used for both encryption and decryption! + ctx.decrypt_cfb(ds, iv, data.ptrw(), data.ptrw()); } data.resize(length); @@ -119,6 +121,25 @@ void FileAccessEncrypted::close() { return; } + _release(); + + file->close(); + memdelete(file); + + file = nullptr; +} + +void FileAccessEncrypted::release() { + if (!file) { + return; + } + + _release(); + + file = nullptr; +} + +void FileAccessEncrypted::_release() { if (writing) { Vector compressed; size_t len = data.size(); @@ -138,27 +159,23 @@ void FileAccessEncrypted::close() { CryptoCore::AESContext ctx; ctx.set_encode_key(key.ptrw(), 256); - for (size_t i = 0; i < len; i += 16) { - ctx.encrypt_ecb(&compressed.write[i], &compressed.write[i]); + if (use_magic) { + file->store_32(ENCRYPTED_HEADER_MAGIC); } - file->store_32(COMP_MAGIC); - file->store_32(mode); - file->store_buffer(hash, 16); file->store_64(data.size()); - file->store_buffer(compressed.ptr(), compressed.size()); - file->close(); - memdelete(file); - file = nullptr; - data.clear(); + unsigned char iv[16]; + for (int i = 0; i < 16; i++) { + iv[i] = Math::rand() % 256; + file->store_8(iv[i]); + } - } else { - file->close(); - memdelete(file); + ctx.encrypt_cfb(len, iv, compressed.ptrw(), compressed.ptrw()); + + file->store_buffer(compressed.ptr(), compressed.size()); data.clear(); - file = nullptr; } } diff --git a/core/io/file_access_encrypted.h b/core/io/file_access_encrypted.h index e269c1e30c..fddc6842f3 100644 --- a/core/io/file_access_encrypted.h +++ b/core/io/file_access_encrypted.h @@ -33,6 +33,8 @@ #include "core/os/file_access.h" +#define ENCRYPTED_HEADER_MAGIC 0x43454447 + class FileAccessEncrypted : public FileAccess { public: enum Mode { @@ -42,7 +44,6 @@ public: }; private: - Mode mode = MODE_MAX; Vector key; bool writing = false; FileAccess *file = nullptr; @@ -51,13 +52,17 @@ private: Vector data; mutable int pos = 0; mutable bool eofed = false; + bool use_magic = true; + + void _release(); public: - Error open_and_parse(FileAccess *p_base, const Vector &p_key, Mode p_mode); + Error open_and_parse(FileAccess *p_base, const Vector &p_key, Mode p_mode, bool p_with_magic = true); Error open_and_parse_password(FileAccess *p_base, const String &p_key, Mode p_mode); virtual Error _open(const String &p_path, int p_mode_flags); ///< open a file virtual void close(); ///< close a file + virtual void release(); ///< finish and keep base file open virtual bool is_open() const; ///< true when file is open virtual String get_path() const; /// returns the path for the current open file diff --git a/core/io/file_access_pack.cpp b/core/io/file_access_pack.cpp index cc8d68be83..8fdbb650d4 100644 --- a/core/io/file_access_pack.cpp +++ b/core/io/file_access_pack.cpp @@ -30,6 +30,8 @@ #include "file_access_pack.h" +#include "core/io/file_access_encrypted.h" +#include "core/script_language.h" #include "core/version.h" #include @@ -44,13 +46,14 @@ Error PackedData::add_pack(const String &p_path, bool p_replace_files, size_t p_ return ERR_FILE_UNRECOGNIZED; } -void PackedData::add_path(const String &pkg_path, const String &path, uint64_t ofs, uint64_t size, const uint8_t *p_md5, PackSource *p_src, bool p_replace_files) { +void PackedData::add_path(const String &pkg_path, const String &path, uint64_t ofs, uint64_t size, const uint8_t *p_md5, PackSource *p_src, bool p_replace_files, bool p_encrypted) { PathMD5 pmd5(path.md5_buffer()); //printf("adding path %s, %lli, %lli\n", path.utf8().get_data(), pmd5.a, pmd5.b); bool exists = files.has(pmd5); PackedFile pf; + pf.encrypted = p_encrypted; pf.pack = pkg_path; pf.offset = ofs; pf.size = size; @@ -179,6 +182,11 @@ bool PackedSourcePCK::try_open_pack(const String &p_path, bool p_replace_files, ERR_FAIL_V_MSG(false, "Pack created with a newer version of the engine: " + itos(ver_major) + "." + itos(ver_minor) + "."); } + uint32_t pack_flags = f->get_32(); + uint64_t file_base = f->get_64(); + + bool enc_directory = (pack_flags & PACK_DIR_ENCRYPTED); + for (int i = 0; i < 16; i++) { //reserved f->get_32(); @@ -186,6 +194,30 @@ bool PackedSourcePCK::try_open_pack(const String &p_path, bool p_replace_files, int file_count = f->get_32(); + if (enc_directory) { + FileAccessEncrypted *fae = memnew(FileAccessEncrypted); + if (!fae) { + f->close(); + memdelete(f); + ERR_FAIL_V_MSG(false, "Can't open encrypted pack directory."); + } + + Vector key; + key.resize(32); + for (int i = 0; i < key.size(); i++) { + key.write[i] = script_encryption_key[i]; + } + + Error err = fae->open_and_parse(f, key, FileAccessEncrypted::MODE_READ, false); + if (err) { + f->close(); + memdelete(f); + memdelete(fae); + ERR_FAIL_V_MSG(false, "Can't open encrypted pack directory."); + } + f = fae; + } + for (int i = 0; i < file_count; i++) { uint32_t sl = f->get_32(); CharString cs; @@ -196,11 +228,13 @@ bool PackedSourcePCK::try_open_pack(const String &p_path, bool p_replace_files, String path; path.parse_utf8(cs.ptr()); - uint64_t ofs = f->get_64(); + uint64_t ofs = file_base + f->get_64(); uint64_t size = f->get_64(); uint8_t md5[16]; f->get_buffer(md5, 16); - PackedData::get_singleton()->add_path(p_path, path, ofs + p_offset, size, md5, this, p_replace_files); + uint32_t flags = f->get_32(); + + PackedData::get_singleton()->add_path(p_path, path, ofs + p_offset, size, md5, this, p_replace_files, (flags & PACK_FILE_ENCRYPTED)); } f->close(); @@ -234,7 +268,7 @@ void FileAccessPack::seek(size_t p_position) { eof = false; } - f->seek(pf.offset + p_position); + f->seek(off + p_position); pos = p_position; } @@ -319,12 +353,35 @@ FileAccessPack::FileAccessPack(const String &p_path, const PackedData::PackedFil ERR_FAIL_COND_MSG(!f, "Can't open pack-referenced file '" + String(pf.pack) + "'."); f->seek(pf.offset); + off = pf.offset; + + if (pf.encrypted) { + FileAccessEncrypted *fae = memnew(FileAccessEncrypted); + if (!fae) { + ERR_FAIL_MSG("Can't open encrypted pack-referenced file '" + String(pf.pack) + "'."); + } + + Vector key; + key.resize(32); + for (int i = 0; i < key.size(); i++) { + key.write[i] = script_encryption_key[i]; + } + + Error err = fae->open_and_parse(f, key, FileAccessEncrypted::MODE_READ, false); + if (err) { + memdelete(fae); + ERR_FAIL_MSG("Can't open encrypted pack-referenced file '" + String(pf.pack) + "'."); + } + f = fae; + off = 0; + } pos = 0; eof = false; } FileAccessPack::~FileAccessPack() { if (f) { + f->close(); memdelete(f); } } diff --git a/core/io/file_access_pack.h b/core/io/file_access_pack.h index 6e316119cb..d934b0deb5 100644 --- a/core/io/file_access_pack.h +++ b/core/io/file_access_pack.h @@ -40,7 +40,15 @@ // Godot's packed file magic header ("GDPC" in ASCII). #define PACK_HEADER_MAGIC 0x43504447 // The current packed file format version number. -#define PACK_FORMAT_VERSION 1 +#define PACK_FORMAT_VERSION 2 + +enum PackFlags { + PACK_DIR_ENCRYPTED = 1 << 0 +}; + +enum PackFileFlags { + PACK_FILE_ENCRYPTED = 1 << 0 +}; class PackSource; @@ -56,6 +64,7 @@ public: uint64_t size; uint8_t md5[16]; PackSource *src; + bool encrypted; }; private: @@ -102,7 +111,7 @@ private: public: void add_pack_source(PackSource *p_source); - void add_path(const String &pkg_path, const String &path, uint64_t ofs, uint64_t size, const uint8_t *p_md5, PackSource *p_src, bool p_replace_files); // for PackSource + void add_path(const String &pkg_path, const String &path, uint64_t ofs, uint64_t size, const uint8_t *p_md5, PackSource *p_src, bool p_replace_files, bool p_encrypted = false); // for PackSource void set_disabled(bool p_disabled) { disabled = p_disabled; } _FORCE_INLINE_ bool is_disabled() const { return disabled; } @@ -135,6 +144,7 @@ class FileAccessPack : public FileAccess { mutable size_t pos; mutable bool eof; + uint64_t off; FileAccess *f; virtual Error _open(const String &p_path, int p_mode_flags); diff --git a/core/io/file_access_zip.cpp b/core/io/file_access_zip.cpp index d75ca2fdc6..ce402fe8ed 100644 --- a/core/io/file_access_zip.cpp +++ b/core/io/file_access_zip.cpp @@ -200,7 +200,7 @@ bool ZipArchive::try_open_pack(const String &p_path, bool p_replace_files, size_ files[fname] = f; uint8_t md5[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; - PackedData::get_singleton()->add_path(p_path, fname, 1, 0, md5, this, p_replace_files); + PackedData::get_singleton()->add_path(p_path, fname, 1, 0, md5, this, p_replace_files, false); //printf("packed data add path %s, %s\n", p_name.utf8().get_data(), fname.utf8().get_data()); if ((i + 1) < gi.number_entry) { diff --git a/core/io/pck_packer.cpp b/core/io/pck_packer.cpp index 374b2a5e07..5480d3c535 100644 --- a/core/io/pck_packer.cpp +++ b/core/io/pck_packer.cpp @@ -30,36 +30,58 @@ #include "pck_packer.h" +#include "core/crypto/crypto_core.h" +#include "core/io/file_access_encrypted.h" #include "core/io/file_access_pack.h" // PACK_HEADER_MAGIC, PACK_FORMAT_VERSION #include "core/os/file_access.h" #include "core/version.h" -static uint64_t _align(uint64_t p_n, int p_alignment) { - if (p_alignment == 0) { - return p_n; +static int _get_pad(int p_alignment, int p_n) { + int rest = p_n % p_alignment; + int pad = 0; + if (rest > 0) { + pad = p_alignment - rest; } - uint64_t rest = p_n % p_alignment; - if (rest == 0) { - return p_n; - } else { - return p_n + (p_alignment - rest); - } -} - -static void _pad(FileAccess *p_file, int p_bytes) { - for (int i = 0; i < p_bytes; i++) { - p_file->store_8(0); - } + return pad; } void PCKPacker::_bind_methods() { - ClassDB::bind_method(D_METHOD("pck_start", "pck_name", "alignment"), &PCKPacker::pck_start, DEFVAL(0)); - ClassDB::bind_method(D_METHOD("add_file", "pck_path", "source_path"), &PCKPacker::add_file); + ClassDB::bind_method(D_METHOD("pck_start", "pck_name", "alignment", "key", "encrypt_directory"), &PCKPacker::pck_start, DEFVAL(0), DEFVAL(String()), DEFVAL(false)); + ClassDB::bind_method(D_METHOD("add_file", "pck_path", "source_path", "encrypt"), &PCKPacker::add_file, DEFVAL(false)); ClassDB::bind_method(D_METHOD("flush", "verbose"), &PCKPacker::flush, DEFVAL(false)); } -Error PCKPacker::pck_start(const String &p_file, int p_alignment) { +Error PCKPacker::pck_start(const String &p_file, int p_alignment, const String &p_key, bool p_encrypt_directory) { + ERR_FAIL_COND_V_MSG((p_key.empty() || !p_key.is_valid_hex_number(false) || p_key.length() != 64), ERR_CANT_CREATE, "Invalid Encryption Key (must be 64 characters long)."); + + String _key = p_key.to_lower(); + key.resize(32); + for (int i = 0; i < 32; i++) { + int v = 0; + if (i * 2 < _key.length()) { + char32_t ct = _key[i * 2]; + if (ct >= '0' && ct <= '9') { + ct = ct - '0'; + } else if (ct >= 'a' && ct <= 'f') { + ct = 10 + ct - 'a'; + } + v |= ct << 4; + } + + if (i * 2 + 1 < _key.length()) { + char32_t ct = _key[i * 2 + 1]; + if (ct >= '0' && ct <= '9') { + ct = ct - '0'; + } else if (ct >= 'a' && ct <= 'f') { + ct = 10 + ct - 'a'; + } + v |= ct; + } + key.write[i] = v; + } + enc_dir = p_encrypt_directory; + if (file != nullptr) { memdelete(file); } @@ -76,16 +98,19 @@ Error PCKPacker::pck_start(const String &p_file, int p_alignment) { file->store_32(VERSION_MINOR); file->store_32(VERSION_PATCH); - for (int i = 0; i < 16; i++) { - file->store_32(0); // reserved + uint32_t pack_flags = 0; + if (enc_dir) { + pack_flags |= PACK_DIR_ENCRYPTED; } + file->store_32(pack_flags); // flags files.clear(); + ofs = 0; return OK; } -Error PCKPacker::add_file(const String &p_file, const String &p_src) { +Error PCKPacker::add_file(const String &p_file, const String &p_src, bool p_encrypt) { FileAccess *f = FileAccess::open(p_src, FileAccess::READ); if (!f) { return ERR_FILE_CANT_OPEN; @@ -94,8 +119,32 @@ Error PCKPacker::add_file(const String &p_file, const String &p_src) { File pf; pf.path = p_file; pf.src_path = p_src; + pf.ofs = ofs; pf.size = f->get_len(); - pf.offset_offset = 0; + + Vector data = FileAccess::get_file_as_array(p_src); + { + unsigned char hash[16]; + CryptoCore::md5(data.ptr(), data.size(), hash); + pf.md5.resize(16); + for (int i = 0; i < 16; i++) { + pf.md5.write[i] = hash[i]; + } + } + pf.encrypted = p_encrypt; + + uint64_t _size = pf.size; + if (p_encrypt) { // Add encryption overhead. + if (_size % 16) { // Pad to encryption block size. + _size += 16 - (_size % 16); + } + _size += 16; // hash + _size += 8; // data size + _size += 16; // iv + } + + int pad = _get_pad(alignment, ofs + _size); + ofs = ofs + _size + pad; files.push_back(pf); @@ -108,27 +157,64 @@ Error PCKPacker::add_file(const String &p_file, const String &p_src) { Error PCKPacker::flush(bool p_verbose) { ERR_FAIL_COND_V_MSG(!file, ERR_INVALID_PARAMETER, "File must be opened before use."); - // write the index + int64_t file_base_ofs = file->get_position(); + file->store_64(0); // files base + for (int i = 0; i < 16; i++) { + file->store_32(0); // reserved + } + + // write the index file->store_32(files.size()); + FileAccessEncrypted *fae = nullptr; + FileAccess *fhead = file; + + if (enc_dir) { + fae = memnew(FileAccessEncrypted); + ERR_FAIL_COND_V(!fae, ERR_CANT_CREATE); + + Error err = fae->open_and_parse(file, key, FileAccessEncrypted::MODE_WRITE_AES256, false); + ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE); + + fhead = fae; + } + for (int i = 0; i < files.size(); i++) { - file->store_pascal_string(files[i].path); - files.write[i].offset_offset = file->get_position(); - file->store_64(0); // offset - file->store_64(files[i].size); // size - - // # empty md5 - file->store_32(0); - file->store_32(0); - file->store_32(0); - file->store_32(0); + int string_len = files[i].path.utf8().length(); + int pad = _get_pad(4, string_len); + + fhead->store_32(string_len + pad); + fhead->store_buffer((const uint8_t *)files[i].path.utf8().get_data(), string_len); + for (int j = 0; j < pad; j++) { + fhead->store_8(0); + } + + fhead->store_64(files[i].ofs); + fhead->store_64(files[i].size); // pay attention here, this is where file is + fhead->store_buffer(files[i].md5.ptr(), 16); //also save md5 for file + + uint32_t flags = 0; + if (files[i].encrypted) { + flags |= PACK_FILE_ENCRYPTED; + } + fhead->store_32(flags); + } + + if (fae) { + fae->release(); + memdelete(fae); } - uint64_t ofs = file->get_position(); - ofs = _align(ofs, alignment); + int header_padding = _get_pad(alignment, file->get_position()); + for (int i = 0; i < header_padding; i++) { + file->store_8(Math::rand() % 256); + } - _pad(file, ofs - file->get_position()); + int64_t file_base = file->get_position(); + file->seek(file_base_ofs); + file->store_64(file_base); // update files base + file->seek(file_base); const uint32_t buf_max = 65536; uint8_t *buf = memnew_arr(uint8_t, buf_max); @@ -137,26 +223,41 @@ Error PCKPacker::flush(bool p_verbose) { for (int i = 0; i < files.size(); i++) { FileAccess *src = FileAccess::open(files[i].src_path, FileAccess::READ); uint64_t to_write = files[i].size; + + fae = nullptr; + FileAccess *ftmp = file; + if (files[i].encrypted) { + fae = memnew(FileAccessEncrypted); + ERR_FAIL_COND_V(!fae, ERR_CANT_CREATE); + + Error err = fae->open_and_parse(file, key, FileAccessEncrypted::MODE_WRITE_AES256, false); + ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE); + ftmp = fae; + } + while (to_write > 0) { int read = src->get_buffer(buf, MIN(to_write, buf_max)); - file->store_buffer(buf, read); + ftmp->store_buffer(buf, read); to_write -= read; } - uint64_t pos = file->get_position(); - file->seek(files[i].offset_offset); // go back to store the file's offset - file->store_64(ofs); - file->seek(pos); + if (fae) { + fae->release(); + memdelete(fae); + } - ofs = _align(ofs + files[i].size, alignment); - _pad(file, ofs - pos); + int pad = _get_pad(alignment, file->get_position()); + for (int j = 0; j < pad; j++) { + file->store_8(Math::rand() % 256); + } src->close(); memdelete(src); count += 1; - if (p_verbose && files.size() > 0) { + const int file_num = files.size(); + if (p_verbose && (file_num > 0)) { if (count % 100 == 0) { - printf("%i/%i (%.2f)\r", count, files.size(), float(count) / files.size() * 100); + printf("%i/%i (%.2f)\r", count, file_num, float(count) / file_num * 100); fflush(stdout); } } diff --git a/core/io/pck_packer.h b/core/io/pck_packer.h index 2929967a68..a6054dff2c 100644 --- a/core/io/pck_packer.h +++ b/core/io/pck_packer.h @@ -40,20 +40,26 @@ class PCKPacker : public Reference { FileAccess *file = nullptr; int alignment; + uint64_t ofs = 0; + + Vector key; + bool enc_dir = false; static void _bind_methods(); struct File { String path; String src_path; - int size; - uint64_t offset_offset; + uint64_t ofs; + uint64_t size; + bool encrypted; + Vector md5; }; Vector files; public: - Error pck_start(const String &p_file, int p_alignment = 0); - Error add_file(const String &p_file, const String &p_src); + Error pck_start(const String &p_file, int p_alignment = 0, const String &p_key = String(), bool p_encrypt_directory = false); + Error add_file(const String &p_file, const String &p_src, bool p_encrypt = false); Error flush(bool p_verbose = false); PCKPacker() {} -- cgit v1.2.3