diff options
Diffstat (limited to 'src/lib/util/unzip.cpp')
-rw-r--r-- | src/lib/util/unzip.cpp | 1103 |
1 files changed, 817 insertions, 286 deletions
diff --git a/src/lib/util/unzip.cpp b/src/lib/util/unzip.cpp index 6a9e407252d..cce6c812a76 100644 --- a/src/lib/util/unzip.cpp +++ b/src/lib/util/unzip.cpp @@ -11,9 +11,9 @@ #include "unzip.h" #include "corestr.h" +#include "hashing.h" #include "osdcore.h" - #include <algorithm> #include <array> #include <cassert> @@ -25,63 +25,12 @@ #include <zlib.h> +#include "lzma/C/LzmaDec.h" + namespace util { namespace { /*************************************************************************** - CONSTANTS -***************************************************************************/ - -/* offsets in end of central directory structure */ -#define ZIPESIG 0x00 -#define ZIPEDSK 0x04 -#define ZIPECEN 0x06 -#define ZIPENUM 0x08 -#define ZIPECENN 0x0a -#define ZIPECSZ 0x0c -#define ZIPEOFST 0x10 -#define ZIPECOML 0x14 -#define ZIPECOM 0x16 - -/* offsets in central directory entry structure */ -#define ZIPCENSIG 0x00 -#define ZIPCVER 0x04 -#define ZIPCOS 0x05 -#define ZIPCVXT 0x06 -#define ZIPCEXOS 0x07 -#define ZIPCFLG 0x08 -#define ZIPCMTHD 0x0a -#define ZIPCTIM 0x0c -#define ZIPCDAT 0x0e -#define ZIPCCRC 0x10 -#define ZIPCSIZ 0x14 -#define ZIPCUNC 0x18 -#define ZIPCFNL 0x1c -#define ZIPCXTL 0x1e -#define ZIPCCML 0x20 -#define ZIPDSK 0x22 -#define ZIPINT 0x24 -#define ZIPEXT 0x26 -#define ZIPOFST 0x2a -#define ZIPCFN 0x2e - -/* offsets in local file header structure */ -#define ZIPLOCSIG 0x00 -#define ZIPVER 0x04 -#define ZIPGENFLG 0x06 -#define ZIPMTHD 0x08 -#define ZIPTIME 0x0a -#define ZIPDATE 0x0c -#define ZIPCRC 0x0e -#define ZIPSIZE 0x12 -#define ZIPUNCMP 0x16 -#define ZIPFNLN 0x1a -#define ZIPXTRALN 0x1c -#define ZIPNAME 0x1e - - - -/*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ @@ -99,10 +48,8 @@ public: , m_cd_pos(0) , m_header() , m_curr_is_dir(false) - , m_curr_name() , m_buffer() { - std::memset(&m_header, 0, sizeof(m_header)); std::fill(m_buffer.begin(), m_buffer.end(), 0); } @@ -116,6 +63,7 @@ public: { ptr result; std::swap(s_cache[cachenum], result); + osd_printf_verbose("unzip: found %s in cache\n", filename.c_str()); return result; } } @@ -137,18 +85,52 @@ public: return ziperr; // verify that we can work with this zipfile (no disk spanning allowed) - if ((m_ecd.disk_number != m_ecd.cd_start_disk_number) || (m_ecd.cd_disk_entries != m_ecd.cd_total_entries)) + if (m_ecd.disk_number != m_ecd.cd_start_disk_number) + { + osd_printf_error("unzip: %s central directory starts in another segment\n", m_filename.c_str()); return archive_file::error::UNSUPPORTED; + } + if (m_ecd.cd_disk_entries != m_ecd.cd_total_entries) + { + osd_printf_error("unzip: %s not all central directory entries reside in this segment\n", m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } + if (std::size_t(m_ecd.cd_size) != m_ecd.cd_size) + { + osd_printf_error("unzip: %s central directory too large to load\n", m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } // allocate memory for the central directory - try { m_cd.resize(m_ecd.cd_size + 1); } - catch (...) { return archive_file::error::OUT_OF_MEMORY; } + try { m_cd.resize(std::size_t(m_ecd.cd_size)); } + catch (...) + { + osd_printf_error("unzip: %s failed to allocate memory for central directory\n", m_filename.c_str()); + return archive_file::error::OUT_OF_MEMORY; + } // read the central directory - std::uint32_t read_length; - auto const filerr = m_file->read(&m_cd[0], m_ecd.cd_start_disk_offset, m_ecd.cd_size, read_length); - if ((filerr != osd_file::error::NONE) || (read_length != m_ecd.cd_size)) - return (filerr == osd_file::error::NONE) ? archive_file::error::FILE_TRUNCATED : archive_file::error::FILE_ERROR; + auto cd_remaining(m_ecd.cd_size); + std::size_t cd_offs(0); + while (cd_remaining) + { + std::uint32_t const chunk(std::uint32_t((std::min<std::uint64_t>)(std::numeric_limits<std::uint32_t>::max(), cd_remaining))); + std::uint32_t read_length(0); + auto const filerr = m_file->read(&m_cd[cd_offs], m_ecd.cd_start_disk_offset + cd_offs, chunk, read_length); + if (filerr != osd_file::error::NONE) + { + osd_printf_error("unzip: %s error reading central directory (%d)\n", m_filename.c_str(), int(filerr)); + return archive_file::error::FILE_ERROR; + } + if (!read_length) + { + osd_printf_error("unzip: %s unexpectedly reached end-of-file while reading central directory\n", m_filename.c_str()); + return archive_file::error::FILE_TRUNCATED; + } + cd_remaining -= read_length; + cd_offs += read_length; + } + osd_printf_verbose("unzip: read %s central directory\n", m_filename.c_str()); return archive_file::error::NONE; } @@ -180,7 +162,7 @@ public: } bool current_is_directory() const { return m_curr_is_dir; } - const std::string ¤t_name() const { return m_curr_name; } + const std::string ¤t_name() const { return m_header.file_name; } std::uint64_t current_uncompressed_length() const { return m_header.uncompressed_length; } std::uint32_t current_crc() const { return m_header.crc; } @@ -200,7 +182,15 @@ private: { auto const filerr = osd_file::open(m_filename, OPEN_FLAG_READ, m_file, m_length); if (filerr != osd_file::error::NONE) + { + // this would spam every time it looks for a non-existent archive, which is a lot + //osd_printf_error("unzip: error reopening archive file %s (%d)\n", m_filename.c_str(), int(filerr)); return archive_file::error::FILE_ERROR; + } + else + { + osd_printf_verbose("unzip: opened archive file %s\n", m_filename.c_str()); + } } return archive_file::error::NONE; } @@ -212,44 +202,31 @@ private: // decompression interfaces archive_file::error decompress_data_type_0(std::uint64_t offset, void *buffer, std::uint32_t length); archive_file::error decompress_data_type_8(std::uint64_t offset, void *buffer, std::uint32_t length); + archive_file::error decompress_data_type_14(std::uint64_t offset, void *buffer, std::uint32_t length); struct file_header { - std::uint32_t signature; // central file header signature std::uint16_t version_created; // version made by std::uint16_t version_needed; // version needed to extract std::uint16_t bit_flag; // general purpose bit flag std::uint16_t compression; // compression method - std::uint16_t file_time; // last mod file time - std::uint16_t file_date; // last mod file date std::uint32_t crc; // crc-32 - std::uint32_t compressed_length; // compressed size - std::uint32_t uncompressed_length; // uncompressed size - std::uint16_t filename_length; // filename length - std::uint16_t extra_field_length; // extra field length - std::uint16_t file_comment_length; // file comment length - std::uint16_t start_disk_number; // disk number start - std::uint16_t internal_attributes; // internal file attributes - std::uint32_t external_attributes; // external file attributes - std::uint32_t local_header_offset; // relative offset of local header - const char * filename; // filename + std::uint64_t compressed_length; // compressed size + std::uint64_t uncompressed_length; // uncompressed size + std::uint32_t start_disk_number; // disk number start + std::uint64_t local_header_offset; // relative offset of local header + std::string file_name; // file name }; // contains extracted end of central directory information struct ecd { - std::uint32_t signature; // end of central dir signature - std::uint16_t disk_number; // number of this disk - std::uint16_t cd_start_disk_number; // number of the disk with the start of the central directory - std::uint16_t cd_disk_entries; // total number of entries in the central directory on this disk - std::uint16_t cd_total_entries; // total number of entries in the central directory - std::uint32_t cd_size; // size of the central directory - std::uint32_t cd_start_disk_offset; // offset of start of central directory with respect to the starting disk number - std::uint16_t comment_length; // .ZIP file comment length - const char * comment; // .ZIP file comment - - std::unique_ptr<std::uint8_t []> raw; // pointer to the raw data - std::uint32_t rawlength; // length of the raw data + std::uint32_t disk_number; // number of this disk + std::uint32_t cd_start_disk_number; // number of the disk with the start of the central directory + std::uint64_t cd_disk_entries; // total number of entries in the central directory on this disk + std::uint64_t cd_total_entries; // total number of entries in the central directory + std::uint64_t cd_size; // size of the central directory + std::uint64_t cd_start_disk_offset; // offset of start of central directory with respect to the starting disk number }; static constexpr std::size_t DECOMPRESS_BUFSIZE = 16384; @@ -267,7 +244,6 @@ private: std::uint32_t m_cd_pos; // position in central directory file_header m_header; // current file header bool m_curr_is_dir; // current file is directory - std::string m_curr_name; // current file name std::array<std::uint8_t, DECOMPRESS_BUFSIZE> m_buffer; // buffer for decompression }; @@ -307,40 +283,282 @@ private: }; +class reader_base +{ +protected: + reader_base(void const *buf) : m_buffer(reinterpret_cast<std::uint8_t const *>(buf)) { } + + std::uint8_t read_byte(std::size_t offs) const + { + return m_buffer[offs]; + } + std::uint16_t read_word(std::size_t offs) const + { + return + (std::uint16_t(m_buffer[offs + 1]) << 8) | + (std::uint16_t(m_buffer[offs + 0]) << 0); + } + std::uint32_t read_dword(std::size_t offs) const + { + return + (std::uint32_t(m_buffer[offs + 3]) << 24) | + (std::uint32_t(m_buffer[offs + 2]) << 16) | + (std::uint32_t(m_buffer[offs + 1]) << 8) | + (std::uint32_t(m_buffer[offs + 0]) << 0); + } + std::uint64_t read_qword(std::size_t offs) const + { + return + (std::uint64_t(m_buffer[offs + 7]) << 56) | + (std::uint64_t(m_buffer[offs + 6]) << 48) | + (std::uint64_t(m_buffer[offs + 5]) << 40) | + (std::uint64_t(m_buffer[offs + 4]) << 32) | + (std::uint64_t(m_buffer[offs + 3]) << 24) | + (std::uint64_t(m_buffer[offs + 2]) << 16) | + (std::uint64_t(m_buffer[offs + 1]) << 8) | + (std::uint64_t(m_buffer[offs + 0]) << 0); + } + std::string read_string(std::size_t offs, std::string::size_type len) const + { + return std::string(reinterpret_cast<char const *>(m_buffer + offs), len); + } + void read_string(std::string &result, std::size_t offs, std::string::size_type len) const + { + result.assign(reinterpret_cast<char const *>(m_buffer + offs), len); + } + + std::uint8_t const *m_buffer; +}; -/*************************************************************************** - INLINE FUNCTIONS -***************************************************************************/ -/** - * @fn static inline UINT16 read_word(UINT8 *buf) - * - * @brief Reads a word. - * - * @param [in,out] buf If non-null, the buffer. - * - * @return The word. - */ - -inline std::uint16_t read_word(std::uint8_t const *buf) +class extra_field_reader : private reader_base { - return (buf[1] << 8) | buf[0]; -} +public: + extra_field_reader(void const *buf, std::size_t len) : reader_base(buf), m_length(len) { } + + std::uint16_t header_id() const { return read_word(0x00); } + std::uint16_t data_size() const { return read_word(0x02); } + void const * data() const { return m_buffer + 0x04; } + extra_field_reader next() const { return extra_field_reader(m_buffer + total_length(), m_length - total_length()); } + + bool length_sufficient() const { return (m_length >= minimum_length()) && (m_length >= total_length()); } + + std::size_t total_length() const { return minimum_length() + data_size(); } + static std::size_t minimum_length() { return 0x04; } + +private: + std::size_t m_length; +}; + -/** - * @fn static inline UINT32 read_dword(UINT8 *buf) - * - * @brief Reads a double word. - * - * @param [in,out] buf If non-null, the buffer. - * - * @return The double word. - */ - -inline std::uint32_t read_dword(std::uint8_t const *buf) +class local_file_header_reader : private reader_base { - return (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; -} +public: + local_file_header_reader(void const *buf) : reader_base(buf) { } + + std::uint32_t signature() const { return read_dword(0x00); } + std::uint8_t version_needed() const { return m_buffer[0x04]; } + std::uint8_t os_needed() const { return m_buffer[0x05]; } + std::uint16_t general_flag() const { return read_word(0x06); } + std::uint16_t compression_method() const { return read_word(0x08); } + std::uint16_t modified_time() const { return read_word(0x0a); } + std::uint16_t modified_date() const { return read_word(0x0c); } + std::uint32_t crc32() const { return read_dword(0x0e); } + std::uint32_t compressed_size() const { return read_dword(0x12); } + std::uint32_t uncompressed_size() const { return read_dword(0x16); } + std::uint16_t file_name_length() const { return read_word(0x1a); } + std::uint16_t extra_field_length() const { return read_word(0x1c); } + std::string file_name() const { return read_string(0x1e, file_name_length()); } + void file_name(std::string &result) const { read_string(result, 0x1e, file_name_length()); } + extra_field_reader extra_field() const { return extra_field_reader(m_buffer + 0x1e + file_name_length(), extra_field_length()); } + + bool signature_correct() const { return signature() == 0x04034b50; } + + std::size_t total_length() const { return minimum_length() + file_name_length() + extra_field_length(); } + static std::size_t minimum_length() { return 0x1e; } +}; + + +class central_dir_entry_reader : private reader_base +{ +public: + central_dir_entry_reader(void const *buf) : reader_base(buf) { } + + std::uint32_t signature() const { return read_dword(0x00); } + std::uint8_t version_created() const { return m_buffer[0x04]; } + std::uint8_t os_created() const { return m_buffer[0x05]; } + std::uint8_t version_needed() const { return m_buffer[0x06]; } + std::uint8_t os_needed() const { return m_buffer[0x07]; } + std::uint16_t general_flag() const { return read_word(0x08); } + std::uint16_t compression_method() const { return read_word(0x0a); } + std::uint16_t modified_time() const { return read_word(0x0c); } + std::uint16_t modified_date() const { return read_word(0x0e); } + std::uint32_t crc32() const { return read_dword(0x10); } + std::uint32_t compressed_size() const { return read_dword(0x14); } + std::uint32_t uncompressed_size() const { return read_dword(0x18); } + std::uint16_t file_name_length() const { return read_word(0x1c); } + std::uint16_t extra_field_length() const { return read_word(0x1e); } + std::uint16_t file_comment_length() const { return read_word(0x20); } + std::uint16_t start_disk() const { return read_word(0x22); } + std::uint16_t int_file_attr() const { return read_word(0x24); } + std::uint32_t ext_file_attr() const { return read_dword(0x26); } + std::uint32_t header_offset() const { return read_dword(0x2a); } + std::string file_name() const { return read_string(0x2e, file_name_length()); } + void file_name(std::string &result) const { read_string(result, 0x2e, file_name_length()); } + extra_field_reader extra_field() const { return extra_field_reader(m_buffer + 0x2e + file_name_length(), extra_field_length()); } + std::string file_comment() const { return read_string(0x2e + file_name_length() + extra_field_length(), file_comment_length()); } + void file_comment(std::string &result) const { read_string(result, 0x2e + file_name_length() + extra_field_length(), file_comment_length()); } + + bool signature_correct() const { return signature() == 0x02014b50; } + + std::size_t total_length() const { return minimum_length() + file_name_length() + extra_field_length() + file_comment_length(); } + static std::size_t minimum_length() { return 0x2e; } +}; + + +class ecd64_reader : private reader_base +{ +public: + ecd64_reader(void const *buf) : reader_base(buf) { } + + std::uint32_t signature() const { return read_dword(0x00); } + std::uint64_t ecd64_size() const { return read_qword(0x04); } + std::uint8_t version_created() const { return m_buffer[0x0c]; } + std::uint8_t os_created() const { return m_buffer[0x0d]; } + std::uint8_t version_needed() const { return m_buffer[0x0e]; } + std::uint8_t os_needed() const { return m_buffer[0x0f]; } + std::uint32_t this_disk_no() const { return read_dword(0x10); } + std::uint32_t dir_start_disk() const { return read_dword(0x14); } + std::uint64_t dir_disk_entries() const { return read_qword(0x18); } + std::uint64_t dir_total_entries() const { return read_qword(0x20); } + std::uint64_t dir_size() const { return read_qword(0x28); } + std::uint64_t dir_offset() const { return read_qword(0x30); } + void const * extensible_data() const { return m_buffer + 0x38; } + + bool signature_correct() const { return signature() == 0x06064b50; } + + std::size_t total_length() const { return 0x0c + ecd64_size(); } + static std::size_t minimum_length() { return 0x38; } +}; + + +class ecd64_locator_reader : private reader_base +{ +public: + ecd64_locator_reader(void const *buf) : reader_base(buf) { } + + std::uint32_t signature() const { return read_dword(0x00); } + std::uint32_t ecd64_disk() const { return read_dword(0x04); } + std::uint64_t ecd64_offset() const { return read_qword(0x08); } + std::uint32_t total_disks() const { return read_dword(0x10); } + + bool signature_correct() const { return signature() == 0x07064b50; } + + std::size_t total_length() const { return minimum_length(); } + static std::size_t minimum_length() { return 0x14; } +}; + + +class ecd_reader : private reader_base +{ +public: + ecd_reader(void const *buf) : reader_base(buf) { } + + std::uint32_t signature() const { return read_dword(0x00); } + std::uint16_t this_disk_no() const { return read_word(0x04); } + std::uint16_t dir_start_disk() const { return read_word(0x06); } + std::uint16_t dir_disk_entries() const { return read_word(0x08); } + std::uint16_t dir_total_entries() const { return read_word(0x0a); } + std::uint32_t dir_size() const { return read_dword(0x0c); } + std::uint32_t dir_offset() const { return read_dword(0x10); } + std::uint16_t comment_length() const { return read_word(0x14); } + std::string comment() const { return read_string(0x16, comment_length()); } + void comment(std::string &result) const { read_string(result, 0x16, comment_length()); } + + bool signature_correct() const { return signature() == 0x06054b50; } + + std::size_t total_length() const { return minimum_length() + comment_length(); } + static std::size_t minimum_length() { return 0x16; } +}; + + +class zip64_ext_info_reader : private reader_base +{ +public: + template <typename T> + zip64_ext_info_reader( + T const &header, + extra_field_reader const &field) + : reader_base(field.data()) + , m_uncompressed_size(header.uncompressed_size()) + , m_compressed_size(header.compressed_size()) + , m_header_offset(header.header_offset()) + , m_start_disk(header.start_disk()) + , m_offs_compressed_size(~m_uncompressed_size ? 0 : 8) + , m_offs_header_offset(m_offs_compressed_size + (~m_compressed_size ? 0 : 8)) + , m_offs_start_disk(m_offs_header_offset + (~m_header_offset ? 0 : 8)) + , m_offs_end(m_offs_start_disk + (~m_start_disk ? 0 : 4)) + { + } + + std::uint64_t uncompressed_size() const { return ~m_uncompressed_size ? m_uncompressed_size : read_qword(0x00); } + std::uint64_t compressed_size() const { return ~m_compressed_size ? m_compressed_size : read_qword(m_offs_compressed_size); } + std::uint64_t header_offset() const { return ~m_header_offset ? m_header_offset : read_qword(m_offs_header_offset); } + std::uint32_t start_disk() const { return ~m_start_disk ? m_start_disk : read_dword(m_offs_start_disk); } + + std::size_t total_length() const { return minimum_length() + m_offs_end; } + static std::size_t minimum_length() { return 0x00; } + +private: + std::uint32_t m_uncompressed_size; + std::uint32_t m_compressed_size; + std::uint32_t m_header_offset; + std::uint16_t m_start_disk; + + std::size_t m_offs_compressed_size; + std::size_t m_offs_header_offset; + std::size_t m_offs_start_disk; + std::size_t m_offs_end; +}; + + +class utf8_path_reader : private reader_base +{ +public: + utf8_path_reader(extra_field_reader const &field) : reader_base(field.data()), m_length(field.data_size()) { } + + std::uint8_t version() const { return m_buffer[0]; } + std::uint32_t name_crc32() const { return read_dword(0x01); } + std::string unicode_name() const { return read_string(0x05, m_length - 0x05); } + void unicode_name(std::string &result) const { return read_string(result, 0x05, m_length - 0x05); } + + std::size_t total_length() const { return m_length; } + static std::size_t minimum_length() { return 0x05; } + +private: + std::size_t m_length; +}; + + +class general_flag_reader +{ +public: + general_flag_reader(std::uint16_t val) : m_value(val) { } + + bool encrypted() const { return bool(m_value & 0x0001); } + bool implode_8k_dict() const { return bool(m_value & 0x0002); } + bool implode_3_trees() const { return bool(m_value & 0x0004); } + unsigned deflate_option() const { return unsigned((m_value >> 1) & 0x0003); } + bool lzma_eos_mark() const { return bool(m_value & 0x0002); } + bool use_descriptor() const { return bool(m_value & 0x0008); } + bool patch_data() const { return bool(m_value & 0x0020); } + bool strong_encryption() const { return bool(m_value & 0x0040); } + bool utf8_encoding() const { return bool(m_value & 0x0800); } + bool directory_encryption() const { return bool(m_value & 0x2000); } + +private: + std::uint16_t m_value; +}; @@ -359,19 +577,12 @@ std::mutex zip_file_impl::s_cache_mutex; to the cache -------------------------------------------------*/ -/** - * @fn void zip_file_close(zip_file *zip) - * - * @brief Zip file close. - * - * @param [in,out] zip If non-null, the zip. - */ - void zip_file_impl::close(ptr &&zip) { if (!zip) return; // close the open files + osd_printf_verbose("unzip: closing archive file %s and sending to cache\n", zip->m_filename.c_str()); zip->m_file.reset(); // find the first NULL entry in the cache @@ -383,7 +594,11 @@ void zip_file_impl::close(ptr &&zip) // if no room left in the cache, free the bottommost entry if (cachenum == s_cache.size()) - s_cache[--cachenum].reset(); + { + cachenum--; + osd_printf_verbose("unzip: removing %s from cache to make space\n", s_cache[cachenum]->m_filename.c_str()); + s_cache[cachenum].reset(); + } // move everyone else down and place us at the top for ( ; cachenum > 0; cachenum--) @@ -397,67 +612,90 @@ void zip_file_impl::close(ptr &&zip) ***************************************************************************/ /*------------------------------------------------- - zip_file_first_entry - return the first entry - in the ZIP --------------------------------------------------*/ - -/*------------------------------------------------- - zip_file_next_entry - return the next entry - in the ZIP + zip_file_search - return the next matching + entry in the ZIP -------------------------------------------------*/ int zip_file_impl::search(std::uint32_t search_crc, const std::string &search_filename, bool matchcrc, bool matchname, bool partialpath) { // if we're at or past the end, we're done - std::string filename; - while ((m_cd_pos + ZIPCFN) <= m_ecd.cd_size) + while ((m_cd_pos + central_dir_entry_reader::minimum_length()) <= m_ecd.cd_size) { - // extract file header info - std::uint8_t const *const raw = &m_cd[0] + m_cd_pos; - m_header.signature = read_dword(raw + ZIPCENSIG); - m_header.version_created = read_word (raw + ZIPCVER); - m_header.version_needed = read_word (raw + ZIPCVXT); - m_header.bit_flag = read_word (raw + ZIPCFLG); - m_header.compression = read_word (raw + ZIPCMTHD); - m_header.file_time = read_word (raw + ZIPCTIM); - m_header.file_date = read_word (raw + ZIPCDAT); - m_header.crc = read_dword(raw + ZIPCCRC); - m_header.compressed_length = read_dword(raw + ZIPCSIZ); - m_header.uncompressed_length = read_dword(raw + ZIPCUNC); - m_header.filename_length = read_word (raw + ZIPCFNL); - m_header.extra_field_length = read_word (raw + ZIPCXTL); - m_header.file_comment_length = read_word (raw + ZIPCCML); - m_header.start_disk_number = read_word (raw + ZIPDSK); - m_header.internal_attributes = read_word (raw + ZIPINT); - m_header.external_attributes = read_dword(raw + ZIPEXT); - m_header.local_header_offset = read_dword(raw + ZIPOFST); - m_header.filename = reinterpret_cast<const char *>(raw + ZIPCFN); - // make sure we have enough data - std::uint32_t const rawlength = ZIPCFN + m_header.filename_length + m_header.extra_field_length + m_header.file_comment_length; - if ((m_cd_pos + rawlength) > m_ecd.cd_size) + central_dir_entry_reader const reader(&m_cd[0] + m_cd_pos); + if (!reader.signature_correct() || ((m_cd_pos + reader.total_length()) > m_ecd.cd_size)) break; + // extract file header info + m_header.version_created = reader.version_created(); + m_header.version_needed = reader.version_needed(); + m_header.bit_flag = reader.general_flag(); + m_header.compression = reader.compression_method(); + m_header.crc = reader.crc32(); + m_header.compressed_length = reader.compressed_size(); + m_header.uncompressed_length = reader.uncompressed_size(); + m_header.start_disk_number = reader.start_disk(); + m_header.local_header_offset = reader.header_offset(); + // advance the position - m_cd_pos += rawlength; + m_cd_pos += reader.total_length(); - // copy the filename filename - bool const is_dir((m_header.filename_length > 0) && (m_header.filename[m_header.filename_length - 1] == '/')); - filename.assign(m_header.filename, m_header.filename_length - (is_dir ? 1 : 0)); + // copy the filename + bool is_utf8(general_flag_reader(m_header.bit_flag).utf8_encoding()); + reader.file_name(m_header.file_name); + + // walk the extra data + for (auto extra = reader.extra_field(); extra.length_sufficient(); extra = extra.next()) + { + // look for ZIP64 extended info + if ((extra.header_id() == 0x0001) && (extra.data_size() >= zip64_ext_info_reader::minimum_length())) + { + zip64_ext_info_reader const ext64(reader, extra); + if (extra.data_size() >= ext64.total_length()) + { + m_header.compressed_length = ext64.compressed_size(); + m_header.uncompressed_length = ext64.uncompressed_size(); + m_header.start_disk_number = ext64.start_disk(); + m_header.local_header_offset = ext64.header_offset(); + } + } + + // look for Info-ZIP UTF-8 path + if (!is_utf8 && (extra.header_id() == 0x7075) && (extra.data_size() >= utf8_path_reader::minimum_length())) + { + utf8_path_reader const utf8path(extra); + if (utf8path.version() == 1) + { + auto const addr(m_header.file_name.empty() ? nullptr : &m_header.file_name[0]); + auto const length(m_header.file_name.empty() ? 0 : m_header.file_name.length() * sizeof(m_header.file_name[0])); + auto const crc(crc32_creator::simple(addr, length)); + if (utf8path.name_crc32() == crc.m_raw) + { + utf8path.unicode_name(m_header.file_name); + is_utf8 = true; + } + } + } + } + + // FIXME: if (!is_utf8) convert filename to UTF8 (assume CP437 or something) + + // chop off trailing slash for directory entries + bool const is_dir(!m_header.file_name.empty() && (m_header.file_name.back() == '/')); + if (is_dir) m_header.file_name.resize(m_header.file_name.length() - 1); // check to see if it matches query bool const crcmatch(search_crc == m_header.crc); - auto const partialoffset(filename.length() - search_filename.length()); - bool const partialpossible((filename.length() > search_filename.length()) && (filename[partialoffset - 1] == '/')); + auto const partialoffset(m_header.file_name.length() - search_filename.length()); + bool const partialpossible((m_header.file_name.length() > search_filename.length()) && (m_header.file_name[partialoffset - 1] == '/')); const bool namematch( - !core_stricmp(search_filename.c_str(), filename.c_str()) || - (partialpath && partialpossible && !core_stricmp(search_filename.c_str(), filename.c_str() + partialoffset))); + !core_stricmp(search_filename.c_str(), m_header.file_name.c_str()) || + (partialpath && partialpossible && !core_stricmp(search_filename.c_str(), m_header.file_name.c_str() + partialoffset))); bool const found = ((!matchcrc && !matchname) || !is_dir) && (!matchcrc || crcmatch) && (!matchname || namematch); if (found) { m_curr_is_dir = is_dir; - m_curr_name = std::move(filename); return 0; } } @@ -470,18 +708,6 @@ int zip_file_impl::search(std::uint32_t search_crc, const std::string &search_fi from a ZIP into the target buffer -------------------------------------------------*/ -/** - * @fn zip_error zip_file_decompress(zip_file *zip, void *buffer, UINT32 length) - * - * @brief Zip file decompress. - * - * @param [in,out] zip If non-null, the zip. - * @param [in,out] buffer If non-null, the buffer. - * @param length The length. - * - * @return A zip_error. - */ - archive_file::error zip_file_impl::decompress(void *buffer, std::uint32_t length) { archive_file::error ziperr; @@ -489,11 +715,17 @@ archive_file::error zip_file_impl::decompress(void *buffer, std::uint32_t length // if we don't have enough buffer, error if (length < m_header.uncompressed_length) + { + osd_printf_error("unzip: buffer too small to decompress %s from %s\n", m_header.file_name.c_str(), m_filename.c_str()); return archive_file::error::BUFFER_TOO_SMALL; + } // make sure the info in the header aligns with what we know if (m_header.start_disk_number != m_ecd.disk_number) + { + osd_printf_error("unzip: %s does not reside in segment %s\n", m_header.file_name.c_str(), m_filename.c_str()); return archive_file::error::UNSUPPORTED; + } // get the compressed data offset ziperr = get_compressed_data_offset(offset); @@ -511,7 +743,14 @@ archive_file::error zip_file_impl::decompress(void *buffer, std::uint32_t length ziperr = decompress_data_type_8(offset, buffer, length); break; + case 14: + ziperr = decompress_data_type_14(offset, buffer, length); + break; + default: + osd_printf_error( + "unzip: %s in %s uses unsupported compression method %u\n", + m_header.file_name.c_str(), m_filename.c_str(), m_header.compression); ziperr = archive_file::error::UNSUPPORTED; break; } @@ -528,16 +767,6 @@ archive_file::error zip_file_impl::decompress(void *buffer, std::uint32_t length read_ecd - read the ECD data -------------------------------------------------*/ -/** - * @fn static zip_error read_ecd(zip_file *zip) - * - * @brief Reads an ecd. - * - * @param [in,out] zip If non-null, the zip. - * - * @return The ecd. - */ - archive_file::error zip_file_impl::read_ecd() { // make sure the file handle is open @@ -546,6 +775,8 @@ archive_file::error zip_file_impl::read_ecd() return ziperr; // we may need multiple tries + osd_file::error error; + std::uint32_t read_length; std::uint32_t buflen = 1024; while (buflen < 65536) { @@ -556,50 +787,136 @@ archive_file::error zip_file_impl::read_ecd() // allocate buffer std::unique_ptr<std::uint8_t []> buffer; try { buffer.reset(new std::uint8_t[buflen + 1]); } - catch (...) { return archive_file::error::OUT_OF_MEMORY; } + catch (...) + { + osd_printf_error("unzip: %s failed to allocate memory for ECD search\n", m_filename.c_str()); + return archive_file::error::OUT_OF_MEMORY; + } // read in one buffers' worth of data - std::uint32_t read_length; - auto const error = m_file->read(&buffer[0], m_length - buflen, buflen, read_length); - if (error != osd_file::error::NONE || read_length != buflen) + error = m_file->read(&buffer[0], m_length - buflen, buflen, read_length); + if ((error != osd_file::error::NONE) || (read_length != buflen)) + { + osd_printf_error("unzip: %s error reading file to search for ECD (%d)\n", m_filename.c_str(), int(error)); return archive_file::error::FILE_ERROR; + } // find the ECD signature std::int32_t offset; - for (offset = buflen - 22; offset >= 0; offset--) - if (buffer[offset + 0] == 'P' && buffer[offset + 1] == 'K' && buffer[offset + 2] == 0x05 && buffer[offset + 3] == 0x06) + for (offset = buflen - ecd_reader::minimum_length(); offset >= 0; offset--) + { + ecd_reader reader(buffer.get() + offset); + if (reader.signature_correct() && ((reader.total_length() + offset) <= buflen)) break; + } // if we found it, fill out the data if (offset >= 0) { - // reuse the buffer as our ECD buffer - m_ecd.raw = std::move(buffer); - m_ecd.rawlength = buflen - offset; - - /* append a NULL terminator to the comment */ - memmove(&m_ecd.raw[0], &m_ecd.raw[offset], m_ecd.rawlength); - m_ecd.raw[m_ecd.rawlength] = 0; - - /* extract ecd info */ - m_ecd.signature = read_dword(&m_ecd.raw[ZIPESIG]); - m_ecd.disk_number = read_word (&m_ecd.raw[ZIPEDSK]); - m_ecd.cd_start_disk_number = read_word (&m_ecd.raw[ZIPECEN]); - m_ecd.cd_disk_entries = read_word (&m_ecd.raw[ZIPENUM]); - m_ecd.cd_total_entries = read_word (&m_ecd.raw[ZIPECENN]); - m_ecd.cd_size = read_dword(&m_ecd.raw[ZIPECSZ]); - m_ecd.cd_start_disk_offset = read_dword(&m_ecd.raw[ZIPEOFST]); - m_ecd.comment_length = read_word (&m_ecd.raw[ZIPECOML]); - m_ecd.comment = reinterpret_cast<const char *>(&m_ecd.raw[ZIPECOM]); + osd_printf_verbose("unzip: found %s ECD\n", m_filename.c_str()); + + // extract ECD info + ecd_reader const ecd_rd(buffer.get() + offset); + m_ecd.disk_number = ecd_rd.this_disk_no(); + m_ecd.cd_start_disk_number = ecd_rd.dir_start_disk(); + m_ecd.cd_disk_entries = ecd_rd.dir_disk_entries(); + m_ecd.cd_total_entries = ecd_rd.dir_total_entries(); + m_ecd.cd_size = ecd_rd.dir_size(); + m_ecd.cd_start_disk_offset = ecd_rd.dir_offset(); + + // is the file too small to contain a ZIP64 ECD locator? + if ((m_length - buflen + offset) < ecd64_locator_reader::minimum_length()) + { + osd_printf_verbose("unzip: %s too small to contain ZIP64 ECD locator\n", m_filename.c_str()); + return archive_file::error::NONE; + } + + // try to read the ZIP64 ECD locator + error = m_file->read( + &buffer[0], + m_length - buflen + offset - ecd64_locator_reader::minimum_length(), + ecd64_locator_reader::minimum_length(), + read_length); + if ((error != osd_file::error::NONE) || (read_length != ecd64_locator_reader::minimum_length())) + { + osd_printf_error("unzip: error reading %s to search for ZIP64 ECD locator (%d)\n", m_filename.c_str(), int(error)); + return archive_file::error::FILE_ERROR; + } + + // if the signature isn't correct, it's not a ZIP64 archive + ecd64_locator_reader const ecd64_loc_rd(buffer.get()); + if (!ecd64_loc_rd.signature_correct()) + { + osd_printf_verbose("unzip: %s has no ZIP64 ECD locator\n", m_filename.c_str()); + return archive_file::error::NONE; + } + + // check that the ZIP64 ECD is in this segment (assuming this segment is the last segment) + if ((ecd64_loc_rd.ecd64_disk() + 1) != ecd64_loc_rd.total_disks()) + { + osd_printf_error("unzip: %s ZIP64 ECD resides in a different segment\n", m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } + + // try to read the ZIP64 ECD + error = m_file->read(&buffer[0], ecd64_loc_rd.ecd64_offset(), ecd64_reader::minimum_length(), read_length); + if (error != osd_file::error::NONE) + { + osd_printf_error("unzip: error reading %s ZIP64 ECD (%d)\n", m_filename.c_str(), int(error)); + return archive_file::error::FILE_ERROR; + } + if (read_length != ecd64_reader::minimum_length()) + { + osd_printf_error("unzip: unexpectedly reached end-of-file while reading %s ZIP64 ECD\n", m_filename.c_str()); + return archive_file::error::FILE_TRUNCATED; + } + + // check ZIP64 ECD + ecd64_reader const ecd64_rd(buffer.get()); + if (!ecd64_rd.signature_correct()) + { + osd_printf_error( + "unzip: %s ZIP64 ECD has incorrect signature 0x%08lx\n", + m_filename.c_str(), long(ecd64_rd.signature())); + return archive_file::error::BAD_SIGNATURE; + } + if (ecd64_rd.total_length() < ecd64_reader::minimum_length()) + { + osd_printf_error("unzip: %s ZIP64 ECD appears to be too small\n", m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } + if (ecd64_rd.version_needed() > 63) + { + osd_printf_error( + "unzip: %s ZIP64 ECD requires unsupported version %u.%u\n", + m_filename.c_str(), unsigned(ecd64_rd.version_needed() / 10), unsigned(ecd64_rd.version_needed() % 10)); + return archive_file::error::UNSUPPORTED; + } + osd_printf_verbose("unzip: found %s ZIP64 ECD\n", m_filename.c_str()); + + // extract ZIP64 ECD info + m_ecd.disk_number = ecd64_rd.this_disk_no(); + m_ecd.cd_start_disk_number = ecd64_rd.dir_start_disk(); + m_ecd.cd_disk_entries = ecd64_rd.dir_disk_entries(); + m_ecd.cd_total_entries = ecd64_rd.dir_total_entries(); + m_ecd.cd_size = ecd64_rd.dir_size(); + m_ecd.cd_start_disk_offset = ecd64_rd.dir_offset(); + return archive_file::error::NONE; } // didn't find it; free this buffer and expand our search if (buflen < m_length) + { buflen *= 2; + } else + { + osd_printf_error("unzip: %s couldn't find ECD\n", m_filename.c_str()); return archive_file::error::BAD_SIGNATURE; + } } + osd_printf_error("unzip: %s couldn't find ECD in last 64KiB\n", m_filename.c_str()); return archive_file::error::OUT_OF_MEMORY; } @@ -609,19 +926,33 @@ archive_file::error zip_file_impl::read_ecd() offset of the compressed data -------------------------------------------------*/ -/** - * @fn static zip_error get_compressed_data_offset(zip_file *zip, UINT64 *offset) - * - * @brief Gets compressed data offset. - * - * @param [in,out] zip If non-null, the zip. - * @param [in,out] offset If non-null, the offset. - * - * @return The compressed data offset. - */ - archive_file::error zip_file_impl::get_compressed_data_offset(std::uint64_t &offset) { + // don't support a number of features + general_flag_reader const flags(m_header.bit_flag); + if (m_header.start_disk_number != m_ecd.disk_number) + { + osd_printf_error("unzip: %s does not reside in segment %s\n", m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } + if (m_header.version_needed > 63) + { + osd_printf_error( + "unzip: %s in %s requires unsupported version %u.%u\n", + m_header.file_name.c_str(), m_filename.c_str(), unsigned(m_header.version_needed / 10), unsigned(m_header.version_needed % 10)); + return archive_file::error::UNSUPPORTED; + } + if (flags.encrypted() || flags.strong_encryption()) + { + osd_printf_error("unzip: %s in %s is encrypted\n", m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } + if (flags.patch_data()) + { + osd_printf_error("unzip: %s in %s is compressed patch data\n", m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } + // make sure the file handle is open auto const ziperr = reopen(); if (ziperr != archive_file::error::NONE) @@ -629,14 +960,32 @@ archive_file::error zip_file_impl::get_compressed_data_offset(std::uint64_t &off // now go read the fixed-sized part of the local file header std::uint32_t read_length; - auto const error = m_file->read(&m_buffer[0], m_header.local_header_offset, ZIPNAME, read_length); - if (error != osd_file::error::NONE || read_length != ZIPNAME) - return (error == osd_file::error::NONE) ? archive_file::error::FILE_TRUNCATED : archive_file::error::FILE_ERROR; + auto const error = m_file->read(&m_buffer[0], m_header.local_header_offset, local_file_header_reader::minimum_length(), read_length); + if (error != osd_file::error::NONE) + { + osd_printf_error( + "unzip: error reading local file header for %s in %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(error)); + return archive_file::error::FILE_ERROR; + } + if (read_length != local_file_header_reader::minimum_length()) + { + osd_printf_error( + "unzip: unexpectedly reached end-of-file while reading local file header for %s in %s\n", + m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::FILE_TRUNCATED; + } - /* compute the final offset */ - offset = m_header.local_header_offset + ZIPNAME; - offset += read_word(&m_buffer[ZIPFNLN]); - offset += read_word(&m_buffer[ZIPXTRALN]); + // compute the final offset + local_file_header_reader reader(&m_buffer[0]); + if (!reader.signature_correct()) + { + osd_printf_error( + "unzip: local file header for %s in %s has incorrect signature %04lx\n", + m_header.file_name.c_str(), m_filename.c_str(), long(reader.signature())); + return archive_file::error::BAD_SIGNATURE; + } + offset = m_header.local_header_offset + reader.total_length(); return archive_file::error::NONE; } @@ -652,31 +1001,25 @@ archive_file::error zip_file_impl::get_compressed_data_offset(std::uint64_t &off type 0 data (which is uncompressed) -------------------------------------------------*/ -/** - * @fn static zip_error decompress_data_type_0(zip_file *zip, UINT64 offset, void *buffer, UINT32 length) - * - * @brief Decompress the data type 0. - * - * @param [in,out] zip If non-null, the zip. - * @param offset The offset. - * @param [in,out] buffer If non-null, the buffer. - * @param length The length. - * - * @return A zip_error. - */ - archive_file::error zip_file_impl::decompress_data_type_0(std::uint64_t offset, void *buffer, std::uint32_t length) { - std::uint32_t read_length; - // the data is uncompressed; just read it + std::uint32_t read_length(0); auto const filerr = m_file->read(buffer, offset, m_header.compressed_length, read_length); if (filerr != osd_file::error::NONE) + { + osd_printf_error("unzip: error reading %s from %s (%d)\n", m_header.file_name.c_str(), m_filename.c_str(), int(filerr)); return archive_file::error::FILE_ERROR; + } else if (read_length != m_header.compressed_length) + { + osd_printf_error("unzip: unexpectedly reached end-of-file while reading %s from %s\n", m_header.file_name.c_str(), m_filename.c_str()); return archive_file::error::FILE_TRUNCATED; + } else + { return archive_file::error::NONE; + } } @@ -685,55 +1028,56 @@ archive_file::error zip_file_impl::decompress_data_type_0(std::uint64_t offset, type 8 data (which is deflated) -------------------------------------------------*/ -/** - * @fn static zip_error decompress_data_type_8(zip_file *zip, UINT64 offset, void *buffer, UINT32 length) - * - * @brief Decompress the data type 8. - * - * @param [in,out] zip If non-null, the zip. - * @param offset The offset. - * @param [in,out] buffer If non-null, the buffer. - * @param length The length. - * - * @return A zip_error. - */ - archive_file::error zip_file_impl::decompress_data_type_8(std::uint64_t offset, void *buffer, std::uint32_t length) { - std::uint32_t input_remaining = m_header.compressed_length; + std::uint64_t input_remaining = m_header.compressed_length; int zerr; - // make sure we don't need a newer mechanism - if (m_header.version_needed > 0x14) - return archive_file::error::UNSUPPORTED; - - /* reset the stream */ + // reset the stream z_stream stream; - memset(&stream, 0, sizeof(stream)); - stream.next_out = (Bytef *)buffer; + stream.zalloc = Z_NULL; + stream.zfree = Z_NULL; + stream.opaque = Z_NULL; + stream.avail_in = 0; + stream.next_out = reinterpret_cast<Bytef *>(buffer); stream.avail_out = length; // initialize the decompressor zerr = inflateInit2(&stream, -MAX_WBITS); if (zerr != Z_OK) + { + osd_printf_error( + "unzip: error allocating zlib stream to inflate %s from %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), zerr); return archive_file::error::DECOMPRESS_ERROR; + } // loop until we're done while (1) { // read in the next chunk of data - std::uint32_t read_length; - auto const filerr = m_file->read(&m_buffer[0], offset, (std::min<std::uint32_t>)(input_remaining, m_buffer.size()), read_length); + std::uint32_t read_length(0); + auto const filerr = m_file->read( + &m_buffer[0], + offset, + std::uint32_t((std::min<std::uint64_t>)(input_remaining, m_buffer.size())), + read_length); if (filerr != osd_file::error::NONE) { + osd_printf_error( + "unzip: error reading compressed data for %s in %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(filerr)); inflateEnd(&stream); return archive_file::error::FILE_ERROR; } offset += read_length; // if we read nothing, but still have data left, the file is truncated - if (read_length == 0 && input_remaining > 0) + if ((read_length == 0) && (input_remaining > 0)) { + osd_printf_error( + "unzip: unexpectedly reached end-of-file while reading compressed data for %s in %s\n", + m_header.file_name.c_str(), m_filename.c_str()); inflateEnd(&stream); return archive_file::error::FILE_TRUNCATED; } @@ -750,9 +1094,12 @@ archive_file::error zip_file_impl::decompress_data_type_8(std::uint64_t offset, // now inflate zerr = inflate(&stream, Z_NO_FLUSH); if (zerr == Z_STREAM_END) + { break; - if (zerr != Z_OK) + } + else if (zerr != Z_OK) { + osd_printf_error("unzip: error inflating %s from %s (%d)\n", m_header.file_name.c_str(), m_filename.c_str(), zerr); inflateEnd(&stream); return archive_file::error::DECOMPRESS_ERROR; } @@ -761,15 +1108,210 @@ archive_file::error zip_file_impl::decompress_data_type_8(std::uint64_t offset, // finish decompression zerr = inflateEnd(&stream); if (zerr != Z_OK) + { + osd_printf_error("unzip: error finishing inflation of %s from %s (%d)\n", m_header.file_name.c_str(), m_filename.c_str(), zerr); return archive_file::error::DECOMPRESS_ERROR; + } - /* if anything looks funny, report an error */ - if (stream.avail_out > 0 || input_remaining > 0) + // if anything looks funny, report an error + if ((stream.avail_out > 0) || (input_remaining > 0)) + { + osd_printf_error( + "unzip: inflation of %s from %s doesn't appear to have completed correctly\n", + m_header.file_name.c_str(), m_filename.c_str()); return archive_file::error::DECOMPRESS_ERROR; + } return archive_file::error::NONE; } + +/*------------------------------------------------- + decompress_data_type_14 - decompress + type 14 data (LZMA) +-------------------------------------------------*/ + +archive_file::error zip_file_impl::decompress_data_type_14(std::uint64_t offset, void *buffer, std::uint32_t length) +{ + // two-byte version + // two-byte properties size (little-endian) + // properties + // compressed data + + assert(4 <= m_buffer.size()); + assert(LZMA_PROPS_SIZE <= m_buffer.size()); + + bool const eos_mark(general_flag_reader(m_header.bit_flag).lzma_eos_mark()); + Byte *const output(reinterpret_cast<Byte *>(buffer)); + SizeT output_remaining(length); + std::uint64_t input_remaining(m_header.compressed_length); + + std::uint32_t read_length; + osd_file::error filerr; + SRes lzerr; + ELzmaStatus lzstatus(LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK); + + // reset the stream + ISzAlloc alloc_imp; + alloc_imp.Alloc = [](void *p, std::size_t size) -> void * { return (size == 0) ? nullptr : std::malloc(size); }; + alloc_imp.Free = [](void *p, void *address) -> void { std::free(address); }; + CLzmaDec stream; + LzmaDec_Construct(&stream); + + // need to read LZMA properties before we can initialise the decompressor + if (4 > input_remaining) + { + osd_printf_error( + "unzip:compressed data for %s in %s is too small to hold LZMA properties header\n", + m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::DECOMPRESS_ERROR; + } + filerr = m_file->read(&m_buffer[0], offset, 4, read_length); + if (filerr != osd_file::error::NONE) + { + osd_printf_error( + "unzip: error reading LZMA properties header for %s in %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(filerr)); + return archive_file::error::FILE_ERROR; + } + offset += read_length; + input_remaining -= read_length; + if (4 != read_length) + { + osd_printf_error( + "unzip: unexpectedly reached end-of-file while reading LZMA properties header for %s in %s\n", + m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::FILE_TRUNCATED; + } + std::uint16_t const props_size((std::uint16_t(m_buffer[3]) << 8) | std::uint16_t(m_buffer[2])); + if (props_size > m_buffer.size()) + { + osd_printf_error( + "unzip: %s in %s has excessively large LZMA properties\n", + m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::UNSUPPORTED; + } + else if (props_size > input_remaining) + { + osd_printf_error( + "unzip:compressed data for %s in %s is too small to hold LZMA properties\n", + m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::DECOMPRESS_ERROR; + } + filerr = m_file->read(&m_buffer[0], offset, props_size, read_length); + if (filerr != osd_file::error::NONE) + { + osd_printf_error( + "unzip: error reading LZMA properties for %s in %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(filerr)); + return archive_file::error::FILE_ERROR; + } + offset += read_length; + input_remaining -= read_length; + if (props_size != read_length) + { + osd_printf_error( + "unzip: unexpectedly reached end-of-file while reading LZMA properties for %s in %s\n", + m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::FILE_TRUNCATED; + } + + // initialize the decompressor + lzerr = LzmaDec_Allocate(&stream, &m_buffer[0], props_size, &alloc_imp); + if (SZ_ERROR_MEM == lzerr) + { + osd_printf_error( + "unzip: memory error allocating LZMA decoder to decompress %s from %s\n", + m_header.file_name.c_str(), m_filename.c_str()); + return archive_file::error::OUT_OF_MEMORY; + } + else if (SZ_OK != lzerr) + { + osd_printf_error( + "unzip: error allocating LZMA decoder to decompress %s from %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(lzerr)); + return archive_file::error::DECOMPRESS_ERROR; + } + LzmaDec_Init(&stream); + + // loop until we're done + while (0 < input_remaining) + { + // read in the next chunk of data + filerr = m_file->read( + &m_buffer[0], + offset, + std::uint32_t((std::min<std::uint64_t>)(input_remaining, m_buffer.size())), + read_length); + if (filerr != osd_file::error::NONE) + { + osd_printf_error( + "unzip: error reading compressed data for %s in %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(filerr)); + LzmaDec_Free(&stream, &alloc_imp); + return archive_file::error::FILE_ERROR; + } + offset += read_length; + input_remaining -= read_length; + + // if we read nothing, but still have data left, the file is truncated + if ((0 == read_length) && (0 < input_remaining)) + { + osd_printf_error( + "unzip: unexpectedly reached end-of-file while reading compressed data for %s in %s\n", + m_header.file_name.c_str(), m_filename.c_str()); + LzmaDec_Free(&stream, &alloc_imp); + return archive_file::error::FILE_TRUNCATED; + } + + // now decompress + SizeT len(read_length); + // FIXME: is the input length really an in/out parameter or not? + // At least on reaching the end of the input, the input length doesn't seem to get updated + lzerr = LzmaDec_DecodeToBuf( + &stream, + output + length - output_remaining, + &output_remaining, + reinterpret_cast<Byte const *>(&m_buffer[0]), + &len, + ((0 == input_remaining) && eos_mark) ? LZMA_FINISH_END : LZMA_FINISH_ANY, + &lzstatus); + if (SZ_OK != lzerr) + { + osd_printf_error("unzip: error decoding LZMA data for %s in %s (%d)\n", m_header.file_name.c_str(), m_filename.c_str(), int(lzerr)); + LzmaDec_Free(&stream, &alloc_imp); + return archive_file::error::DECOMPRESS_ERROR; + } + } + + // finish decompression + LzmaDec_Free(&stream, &alloc_imp); + + // if anything looks funny, report an error + if (LZMA_STATUS_FINISHED_WITH_MARK == lzstatus) + { + return archive_file::error::NONE; + } + else if (eos_mark) + { + osd_printf_error( + "unzip: LZMA end mark not found for %s in %s (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(lzstatus)); + return archive_file::error::DECOMPRESS_ERROR; + } + else if (LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK != lzstatus) + { + osd_printf_error( + "unzip: LZMA decompression of %s from %s doesn't appear to have completed correctly (%d)\n", + m_header.file_name.c_str(), m_filename.c_str(), int(lzstatus)); + return archive_file::error::DECOMPRESS_ERROR; + } + else + { + return archive_file::error::NONE; + } +} + } // anonymous namespace @@ -790,17 +1332,6 @@ void m7z_file_cache_clear(); zip_file_open - opens a ZIP file for reading -------------------------------------------------*/ -/** - * @fn zip_error zip_file_open(const char *filename, zip_file **zip) - * - * @brief Queries if a given zip file open. - * - * @param filename Filename of the file. - * @param [in,out] zip If non-null, the zip. - * - * @return A zip_error. - */ - archive_file::error archive_file::open_zip(const std::string &filename, ptr &result) { // ensure we start with a NULL result |