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/// The .ZIP File Format Specification is found here:
/// https://pkwaredownloads.blob.core.windows.net/pem/APPNOTE.txt
///
/// Note that this file uses the abbreviation "cd" for "central directory"
///
const builtin = @import("builtin");
const std = @import("std");
const testing = std.testing;
pub const testutil = @import("zip/test.zig");
const File = testutil.File;
const FileStore = testutil.FileStore;
pub const CompressionMethod = enum(u16) {
store = 0,
deflate = 8,
_,
};
pub const central_file_header_sig = [4]u8{ 'P', 'K', 1, 2 };
pub const local_file_header_sig = [4]u8{ 'P', 'K', 3, 4 };
pub const end_record_sig = [4]u8{ 'P', 'K', 5, 6 };
pub const end_record64_sig = [4]u8{ 'P', 'K', 6, 6 };
pub const end_locator64_sig = [4]u8{ 'P', 'K', 6, 7 };
pub const ExtraHeader = enum(u16) {
zip64_info = 0x1,
_,
};
const GeneralPurposeFlags = packed struct(u16) {
encrypted: bool,
_: u15,
};
pub const LocalFileHeader = extern struct {
signature: [4]u8 align(1),
version_needed_to_extract: u16 align(1),
flags: GeneralPurposeFlags align(1),
compression_method: CompressionMethod align(1),
last_modification_time: u16 align(1),
last_modification_date: u16 align(1),
crc32: u32 align(1),
compressed_size: u32 align(1),
uncompressed_size: u32 align(1),
filename_len: u16 align(1),
extra_len: u16 align(1),
};
pub const CentralDirectoryFileHeader = extern struct {
signature: [4]u8 align(1),
version_made_by: u16 align(1),
version_needed_to_extract: u16 align(1),
flags: GeneralPurposeFlags align(1),
compression_method: CompressionMethod align(1),
last_modification_time: u16 align(1),
last_modification_date: u16 align(1),
crc32: u32 align(1),
compressed_size: u32 align(1),
uncompressed_size: u32 align(1),
filename_len: u16 align(1),
extra_len: u16 align(1),
comment_len: u16 align(1),
disk_number: u16 align(1),
internal_file_attributes: u16 align(1),
external_file_attributes: u32 align(1),
local_file_header_offset: u32 align(1),
};
pub const EndRecord64 = extern struct {
signature: [4]u8 align(1),
end_record_size: u64 align(1),
version_made_by: u16 align(1),
version_needed_to_extract: u16 align(1),
disk_number: u32 align(1),
central_directory_disk_number: u32 align(1),
record_count_disk: u64 align(1),
record_count_total: u64 align(1),
central_directory_size: u64 align(1),
central_directory_offset: u64 align(1),
};
pub const EndLocator64 = extern struct {
signature: [4]u8 align(1),
zip64_disk_count: u32 align(1),
record_file_offset: u64 align(1),
total_disk_count: u32 align(1),
};
pub const EndRecord = extern struct {
signature: [4]u8 align(1),
disk_number: u16 align(1),
central_directory_disk_number: u16 align(1),
record_count_disk: u16 align(1),
record_count_total: u16 align(1),
central_directory_size: u32 align(1),
central_directory_offset: u32 align(1),
comment_len: u16 align(1),
pub fn need_zip64(self: EndRecord) bool {
return isMaxInt(self.record_count_disk) or
isMaxInt(self.record_count_total) or
isMaxInt(self.central_directory_size) or
isMaxInt(self.central_directory_offset);
}
};
/// Find and return the end record for the given seekable zip stream.
/// Note that `seekable_stream` must be an instance of `std.io.SeekabkeStream` and
/// its context must also have a `.reader()` method that returns an instance of
/// `std.io.Reader`.
pub fn findEndRecord(seekable_stream: anytype, stream_len: u64) !EndRecord {
var buf: [@sizeOf(EndRecord) + std.math.maxInt(u16)]u8 = undefined;
const record_len_max = @min(stream_len, buf.len);
var loaded_len: u32 = 0;
var comment_len: u16 = 0;
while (true) {
const record_len: u32 = @as(u32, comment_len) + @sizeOf(EndRecord);
if (record_len > record_len_max)
return error.ZipNoEndRecord;
if (record_len > loaded_len) {
const new_loaded_len = @min(loaded_len + 300, record_len_max);
const read_len = new_loaded_len - loaded_len;
try seekable_stream.seekTo(stream_len - @as(u64, new_loaded_len));
const read_buf: []u8 = buf[buf.len - new_loaded_len ..][0..read_len];
const len = try seekable_stream.context.reader().readAll(read_buf);
if (len != read_len)
return error.ZipTruncated;
loaded_len = new_loaded_len;
}
const record_bytes = buf[buf.len - record_len ..][0..@sizeOf(EndRecord)];
if (std.mem.eql(u8, record_bytes[0..4], &end_record_sig) and
std.mem.readInt(u16, record_bytes[20..22], .little) == comment_len)
{
const record: *align(1) EndRecord = @ptrCast(record_bytes.ptr);
if (builtin.target.cpu.arch.endian() != .little) {
std.mem.byteSwapAllFields(@TypeOf(record.*), record);
}
return record.*;
}
if (comment_len == std.math.maxInt(u16))
return error.ZipNoEndRecord;
comment_len += 1;
}
}
/// Decompresses the given data from `reader` into `writer`. Stops early if more
/// than `uncompressed_size` bytes are processed and verifies that exactly that
/// number of bytes are decompressed. Returns the CRC-32 of the uncompressed data.
/// `writer` can be anything with a `writeAll(self: *Self, chunk: []const u8) anyerror!void` method.
pub fn decompress(
method: CompressionMethod,
uncompressed_size: u64,
reader: anytype,
writer: anytype,
) !u32 {
var hash = std.hash.Crc32.init();
var total_uncompressed: u64 = 0;
switch (method) {
.store => {
var buf: [std.mem.page_size]u8 = undefined;
while (true) {
const len = try reader.read(&buf);
if (len == 0) break;
try writer.writeAll(buf[0..len]);
hash.update(buf[0..len]);
total_uncompressed += @intCast(len);
}
},
.deflate => {
var br = std.io.bufferedReader(reader);
var decompressor = std.compress.flate.decompressor(br.reader());
while (try decompressor.next()) |chunk| {
try writer.writeAll(chunk);
hash.update(chunk);
total_uncompressed += @intCast(chunk.len);
if (total_uncompressed > uncompressed_size)
return error.ZipUncompressSizeTooSmall;
}
if (br.end != br.start)
return error.ZipDeflateTruncated;
},
_ => return error.UnsupportedCompressionMethod,
}
if (total_uncompressed != uncompressed_size)
return error.ZipUncompressSizeMismatch;
return hash.final();
}
fn isBadFilename(filename: []const u8) bool {
if (filename.len == 0 or filename[0] == '/')
return true;
var it = std.mem.splitScalar(u8, filename, '/');
while (it.next()) |part| {
if (std.mem.eql(u8, part, ".."))
return true;
}
return false;
}
fn isMaxInt(uint: anytype) bool {
return uint == std.math.maxInt(@TypeOf(uint));
}
const FileExtents = struct {
uncompressed_size: u64,
compressed_size: u64,
local_file_header_offset: u64,
};
fn readZip64FileExtents(header: CentralDirectoryFileHeader, extents: *FileExtents, data: []u8) !void {
var data_offset: usize = 0;
if (isMaxInt(header.uncompressed_size)) {
if (data_offset + 8 > data.len)
return error.ZipBadCd64Size;
extents.uncompressed_size = std.mem.readInt(u64, data[data_offset..][0..8], .little);
data_offset += 8;
}
if (isMaxInt(header.compressed_size)) {
if (data_offset + 8 > data.len)
return error.ZipBadCd64Size;
extents.compressed_size = std.mem.readInt(u64, data[data_offset..][0..8], .little);
data_offset += 8;
}
if (isMaxInt(header.local_file_header_offset)) {
if (data_offset + 8 > data.len)
return error.ZipBadCd64Size;
extents.local_file_header_offset = std.mem.readInt(u64, data[data_offset..][0..8], .little);
data_offset += 8;
}
if (isMaxInt(header.disk_number)) {
if (data_offset + 4 > data.len)
return error.ZipInvalid;
const disk_number = std.mem.readInt(u32, data[data_offset..][0..4], .little);
if (disk_number != 0)
return error.ZipMultiDiskUnsupported;
data_offset += 4;
}
if (data_offset > data.len)
return error.ZipBadCd64Size;
}
pub fn Iterator(comptime SeekableStream: type) type {
return struct {
stream: SeekableStream,
cd_record_count: u64,
cd_zip_offset: u64,
cd_size: u64,
cd_record_index: u64 = 0,
cd_record_offset: u64 = 0,
const Self = @This();
pub fn init(stream: SeekableStream) !Self {
const stream_len = try stream.getEndPos();
const end_record = try findEndRecord(stream, stream_len);
if (!isMaxInt(end_record.record_count_disk) and end_record.record_count_disk > end_record.record_count_total)
return error.ZipDiskRecordCountTooLarge;
if (end_record.disk_number != 0 or end_record.central_directory_disk_number != 0)
return error.ZipMultiDiskUnsupported;
{
const counts_valid = !isMaxInt(end_record.record_count_disk) and !isMaxInt(end_record.record_count_total);
if (counts_valid and end_record.record_count_disk != end_record.record_count_total)
return error.ZipMultiDiskUnsupported;
}
var result = Self{
.stream = stream,
.cd_record_count = end_record.record_count_total,
.cd_zip_offset = end_record.central_directory_offset,
.cd_size = end_record.central_directory_size,
};
if (!end_record.need_zip64()) return result;
const locator_end_offset: u64 = @as(u64, end_record.comment_len) + @sizeOf(EndRecord) + @sizeOf(EndLocator64);
if (locator_end_offset > stream_len)
return error.ZipTruncated;
try stream.seekTo(stream_len - locator_end_offset);
const locator = try stream.context.reader().readStructEndian(EndLocator64, .little);
if (!std.mem.eql(u8, &locator.signature, &end_locator64_sig))
return error.ZipBadLocatorSig;
if (locator.zip64_disk_count != 0)
return error.ZipUnsupportedZip64DiskCount;
if (locator.total_disk_count != 1)
return error.ZipMultiDiskUnsupported;
try stream.seekTo(locator.record_file_offset);
const record64 = try stream.context.reader().readStructEndian(EndRecord64, .little);
if (!std.mem.eql(u8, &record64.signature, &end_record64_sig))
return error.ZipBadEndRecord64Sig;
if (record64.end_record_size < @sizeOf(EndRecord64) - 12)
return error.ZipEndRecord64SizeTooSmall;
if (record64.end_record_size > @sizeOf(EndRecord64) - 12)
return error.ZipEndRecord64UnhandledExtraData;
if (record64.version_needed_to_extract > 45)
return error.ZipUnsupportedVersion;
{
const is_multidisk = record64.disk_number != 0 or
record64.central_directory_disk_number != 0 or
record64.record_count_disk != record64.record_count_total;
if (is_multidisk)
return error.ZipMultiDiskUnsupported;
}
if (isMaxInt(end_record.record_count_total)) {
result.cd_record_count = record64.record_count_total;
} else if (end_record.record_count_total != record64.record_count_total)
return error.Zip64RecordCountTotalMismatch;
if (isMaxInt(end_record.central_directory_offset)) {
result.cd_zip_offset = record64.central_directory_offset;
} else if (end_record.central_directory_offset != record64.central_directory_offset)
return error.Zip64CentralDirectoryOffsetMismatch;
if (isMaxInt(end_record.central_directory_size)) {
result.cd_size = record64.central_directory_size;
} else if (end_record.central_directory_size != record64.central_directory_size)
return error.Zip64CentralDirectorySizeMismatch;
return result;
}
pub fn next(self: *Self) !?Entry {
if (self.cd_record_index == self.cd_record_count) {
if (self.cd_record_offset != self.cd_size)
return if (self.cd_size > self.cd_record_offset)
error.ZipCdOversized
else
error.ZipCdUndersized;
return null;
}
const header_zip_offset = self.cd_zip_offset + self.cd_record_offset;
try self.stream.seekTo(header_zip_offset);
const header = try self.stream.context.reader().readStructEndian(CentralDirectoryFileHeader, .little);
if (!std.mem.eql(u8, &header.signature, ¢ral_file_header_sig))
return error.ZipBadCdOffset;
self.cd_record_index += 1;
self.cd_record_offset += @sizeOf(CentralDirectoryFileHeader) + header.filename_len + header.extra_len + header.comment_len;
// Note: checking the version_needed_to_extract doesn't seem to be helpful, i.e. the zip file
// at https://github.com/ninja-build/ninja/releases/download/v1.12.0/ninja-linux.zip
// has an undocumented version 788 but extracts just fine.
if (header.flags.encrypted)
return error.ZipEncryptionUnsupported;
// TODO: check/verify more flags
if (header.disk_number != 0)
return error.ZipMultiDiskUnsupported;
var extents: FileExtents = .{
.uncompressed_size = header.uncompressed_size,
.compressed_size = header.compressed_size,
.local_file_header_offset = header.local_file_header_offset,
};
if (header.extra_len > 0) {
var extra_buf: [std.math.maxInt(u16)]u8 = undefined;
const extra = extra_buf[0..header.extra_len];
{
try self.stream.seekTo(header_zip_offset + @sizeOf(CentralDirectoryFileHeader) + header.filename_len);
const len = try self.stream.context.reader().readAll(extra);
if (len != extra.len)
return error.ZipTruncated;
}
var extra_offset: usize = 0;
while (extra_offset + 4 <= extra.len) {
const header_id = std.mem.readInt(u16, extra[extra_offset..][0..2], .little);
const data_size = std.mem.readInt(u16, extra[extra_offset..][2..4], .little);
const end = extra_offset + 4 + data_size;
if (end > extra.len)
return error.ZipBadExtraFieldSize;
const data = extra[extra_offset + 4 .. end];
switch (@as(ExtraHeader, @enumFromInt(header_id))) {
.zip64_info => try readZip64FileExtents(header, &extents, data),
else => {}, // ignore
}
extra_offset = end;
}
}
return .{
.version_needed_to_extract = header.version_needed_to_extract,
.flags = header.flags,
.compression_method = header.compression_method,
.last_modification_time = header.last_modification_time,
.last_modification_date = header.last_modification_date,
.header_zip_offset = header_zip_offset,
.crc32 = header.crc32,
.filename_len = header.filename_len,
.compressed_size = extents.compressed_size,
.uncompressed_size = extents.uncompressed_size,
.file_offset = extents.local_file_header_offset,
};
}
pub const Entry = struct {
version_needed_to_extract: u16,
flags: GeneralPurposeFlags,
compression_method: CompressionMethod,
last_modification_time: u16,
last_modification_date: u16,
header_zip_offset: u64,
crc32: u32,
filename_len: u32,
compressed_size: u64,
uncompressed_size: u64,
file_offset: u64,
pub fn extract(
self: Entry,
stream: SeekableStream,
options: ExtractOptions,
filename_buf: []u8,
dest: std.fs.Dir,
) !u32 {
if (filename_buf.len < self.filename_len)
return error.ZipInsufficientBuffer;
const filename = filename_buf[0..self.filename_len];
try stream.seekTo(self.header_zip_offset + @sizeOf(CentralDirectoryFileHeader));
{
const len = try stream.context.reader().readAll(filename);
if (len != filename.len)
return error.ZipBadFileOffset;
}
const local_data_header_offset: u64 = local_data_header_offset: {
const local_header = blk: {
try stream.seekTo(self.file_offset);
break :blk try stream.context.reader().readStructEndian(LocalFileHeader, .little);
};
if (!std.mem.eql(u8, &local_header.signature, &local_file_header_sig))
return error.ZipBadFileOffset;
if (local_header.version_needed_to_extract != self.version_needed_to_extract)
return error.ZipMismatchVersionNeeded;
if (local_header.last_modification_time != self.last_modification_time)
return error.ZipMismatchModTime;
if (local_header.last_modification_date != self.last_modification_date)
return error.ZipMismatchModDate;
if (@as(u16, @bitCast(local_header.flags)) != @as(u16, @bitCast(self.flags)))
return error.ZipMismatchFlags;
if (local_header.crc32 != 0 and local_header.crc32 != self.crc32)
return error.ZipMismatchCrc32;
if (local_header.compressed_size != 0 and
local_header.compressed_size != self.compressed_size)
return error.ZipMismatchCompLen;
if (local_header.uncompressed_size != 0 and
local_header.uncompressed_size != self.uncompressed_size)
return error.ZipMismatchUncompLen;
if (local_header.filename_len != self.filename_len)
return error.ZipMismatchFilenameLen;
break :local_data_header_offset @as(u64, local_header.filename_len) +
@as(u64, local_header.extra_len);
};
if (isBadFilename(filename))
return error.ZipBadFilename;
if (options.allow_backslashes) {
std.mem.replaceScalar(u8, filename, '\\', '/');
} else {
if (std.mem.indexOfScalar(u8, filename, '\\')) |_|
return error.ZipFilenameHasBackslash;
}
// All entries that end in '/' are directories
if (filename[filename.len - 1] == '/') {
if (self.uncompressed_size != 0)
return error.ZipBadDirectorySize;
try dest.makePath(filename[0 .. filename.len - 1]);
return std.hash.Crc32.hash(&.{});
}
const out_file = blk: {
if (std.fs.path.dirname(filename)) |dirname| {
var parent_dir = try dest.makeOpenPath(dirname, .{});
defer parent_dir.close();
const basename = std.fs.path.basename(filename);
break :blk try parent_dir.createFile(basename, .{ .exclusive = true });
}
break :blk try dest.createFile(filename, .{ .exclusive = true });
};
defer out_file.close();
const local_data_file_offset: u64 =
@as(u64, self.file_offset) +
@as(u64, @sizeOf(LocalFileHeader)) +
local_data_header_offset;
try stream.seekTo(local_data_file_offset);
var limited_reader = std.io.limitedReader(stream.context.reader(), self.compressed_size);
const crc = try decompress(
self.compression_method,
self.uncompressed_size,
limited_reader.reader(),
out_file.writer(),
);
if (limited_reader.bytes_left != 0)
return error.ZipDecompressTruncated;
return crc;
}
};
};
}
// returns true if `filename` starts with `root` followed by a forward slash
fn filenameInRoot(filename: []const u8, root: []const u8) bool {
return (filename.len >= root.len + 1) and
(filename[root.len] == '/') and
std.mem.eql(u8, filename[0..root.len], root);
}
pub const Diagnostics = struct {
allocator: std.mem.Allocator,
/// The common root directory for all extracted files if there is one.
root_dir: []const u8 = "",
saw_first_file: bool = false,
pub fn deinit(self: *Diagnostics) void {
self.allocator.free(self.root_dir);
self.* = undefined;
}
// This function assumes name is a filename from a zip file which has already been verified to
// not start with a slash, backslashes have been normalized to forward slashes, and directories
// always end in a slash.
pub fn nextFilename(self: *Diagnostics, name: []const u8) error{OutOfMemory}!void {
if (!self.saw_first_file) {
self.saw_first_file = true;
std.debug.assert(self.root_dir.len == 0);
const root_len = std.mem.indexOfScalar(u8, name, '/') orelse return;
std.debug.assert(root_len > 0);
self.root_dir = try self.allocator.dupe(u8, name[0..root_len]);
} else if (self.root_dir.len > 0) {
if (!filenameInRoot(name, self.root_dir)) {
self.allocator.free(self.root_dir);
self.root_dir = "";
}
}
}
};
pub const ExtractOptions = struct {
/// Allow filenames within the zip to use backslashes. Back slashes are normalized
/// to forward slashes before forwarding them to platform APIs.
allow_backslashes: bool = false,
diagnostics: ?*Diagnostics = null,
};
/// Extract the zipped files inside `seekable_stream` to the given `dest` directory.
/// Note that `seekable_stream` must be an instance of `std.io.SeekabkeStream` and
/// its context must also have a `.reader()` method that returns an instance of
/// `std.io.Reader`.
pub fn extract(dest: std.fs.Dir, seekable_stream: anytype, options: ExtractOptions) !void {
const SeekableStream = @TypeOf(seekable_stream);
var iter = try Iterator(SeekableStream).init(seekable_stream);
var filename_buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
while (try iter.next()) |entry| {
const crc32 = try entry.extract(seekable_stream, options, &filename_buf, dest);
if (crc32 != entry.crc32)
return error.ZipCrcMismatch;
if (options.diagnostics) |d| {
try d.nextFilename(filename_buf[0..entry.filename_len]);
}
}
}
fn testZip(options: ExtractOptions, comptime files: []const File, write_opt: testutil.WriteZipOptions) !void {
var store: [files.len]FileStore = undefined;
try testZipWithStore(options, files, write_opt, &store);
}
fn testZipWithStore(
options: ExtractOptions,
test_files: []const File,
write_opt: testutil.WriteZipOptions,
store: []FileStore,
) !void {
var zip_buf: [4096]u8 = undefined;
var fbs = try testutil.makeZipWithStore(&zip_buf, test_files, write_opt, store);
var tmp = testing.tmpDir(.{ .no_follow = true });
defer tmp.cleanup();
try extract(tmp.dir, fbs.seekableStream(), options);
try testutil.expectFiles(test_files, tmp.dir, .{});
}
fn testZipError(expected_error: anyerror, file: File, options: ExtractOptions) !void {
var zip_buf: [4096]u8 = undefined;
var store: [1]FileStore = undefined;
var fbs = try testutil.makeZipWithStore(&zip_buf, &[_]File{file}, .{}, &store);
var tmp = testing.tmpDir(.{ .no_follow = true });
defer tmp.cleanup();
try testing.expectError(expected_error, extract(tmp.dir, fbs.seekableStream(), options));
}
test "zip one file" {
try testZip(.{}, &[_]File{
.{ .name = "onefile.txt", .content = "Just a single file\n", .compression = .store },
}, .{});
}
test "zip multiple files" {
try testZip(.{ .allow_backslashes = true }, &[_]File{
.{ .name = "foo", .content = "a foo file\n", .compression = .store },
.{ .name = "subdir/bar", .content = "bar is this right?\nanother newline\n", .compression = .store },
.{ .name = "subdir\\whoa", .content = "you can do backslashes", .compression = .store },
.{ .name = "subdir/another/baz", .content = "bazzy mc bazzerson", .compression = .store },
}, .{});
}
test "zip deflated" {
try testZip(.{}, &[_]File{
.{ .name = "deflateme", .content = "This is a deflated file.\nIt should be smaller in the Zip file1\n", .compression = .deflate },
// TODO: re-enable this if/when we add support for deflate64
//.{ .name = "deflateme64", .content = "The 64k version of deflate!\n", .compression = .deflate64 },
.{ .name = "raw", .content = "Not all files need to be deflated in the same Zip.\n", .compression = .store },
}, .{});
}
test "zip verify filenames" {
// no empty filenames
try testZipError(error.ZipBadFilename, .{ .name = "", .content = "", .compression = .store }, .{});
// no absolute paths
try testZipError(error.ZipBadFilename, .{ .name = "/", .content = "", .compression = .store }, .{});
try testZipError(error.ZipBadFilename, .{ .name = "/foo", .content = "", .compression = .store }, .{});
try testZipError(error.ZipBadFilename, .{ .name = "/foo/bar", .content = "", .compression = .store }, .{});
// no '..' components
try testZipError(error.ZipBadFilename, .{ .name = "..", .content = "", .compression = .store }, .{});
try testZipError(error.ZipBadFilename, .{ .name = "foo/..", .content = "", .compression = .store }, .{});
try testZipError(error.ZipBadFilename, .{ .name = "foo/bar/..", .content = "", .compression = .store }, .{});
try testZipError(error.ZipBadFilename, .{ .name = "foo/bar/../", .content = "", .compression = .store }, .{});
// no backslashes
try testZipError(error.ZipFilenameHasBackslash, .{ .name = "foo\\bar", .content = "", .compression = .store }, .{});
}
test "zip64" {
const test_files = [_]File{
.{ .name = "fram", .content = "fram foo fro fraba", .compression = .store },
.{ .name = "subdir/barro", .content = "aljdk;jal;jfd;lajkf", .compression = .store },
};
try testZip(.{}, &test_files, .{
.end = .{
.zip64 = .{},
.record_count_disk = std.math.maxInt(u16), // trigger zip64
},
});
try testZip(.{}, &test_files, .{
.end = .{
.zip64 = .{},
.record_count_total = std.math.maxInt(u16), // trigger zip64
},
});
try testZip(.{}, &test_files, .{
.end = .{
.zip64 = .{},
.record_count_disk = std.math.maxInt(u16), // trigger zip64
.record_count_total = std.math.maxInt(u16), // trigger zip64
},
});
try testZip(.{}, &test_files, .{
.end = .{
.zip64 = .{},
.central_directory_size = std.math.maxInt(u32), // trigger zip64
},
});
try testZip(.{}, &test_files, .{
.end = .{
.zip64 = .{},
.central_directory_offset = std.math.maxInt(u32), // trigger zip64
},
});
}
test "bad zip files" {
var tmp = testing.tmpDir(.{ .no_follow = true });
defer tmp.cleanup();
var zip_buf: [4096]u8 = undefined;
const file_a = [_]File{.{ .name = "a", .content = "", .compression = .store }};
{
var fbs = try testutil.makeZip(&zip_buf, &.{}, .{ .end = .{ .sig = [_]u8{ 1, 2, 3, 4 } } });
try testing.expectError(error.ZipNoEndRecord, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &.{}, .{ .end = .{ .comment_len = 1 } });
try testing.expectError(error.ZipNoEndRecord, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &.{}, .{ .end = .{ .comment = "a", .comment_len = 0 } });
try testing.expectError(error.ZipNoEndRecord, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &.{}, .{ .end = .{ .disk_number = 1 } });
try testing.expectError(error.ZipMultiDiskUnsupported, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &.{}, .{ .end = .{ .central_directory_disk_number = 1 } });
try testing.expectError(error.ZipMultiDiskUnsupported, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &.{}, .{ .end = .{ .record_count_disk = 1 } });
try testing.expectError(error.ZipDiskRecordCountTooLarge, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &.{}, .{ .end = .{ .central_directory_size = 1 } });
try testing.expectError(error.ZipCdOversized, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &file_a, .{ .end = .{ .central_directory_size = 0 } });
try testing.expectError(error.ZipCdUndersized, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &file_a, .{ .end = .{ .central_directory_offset = 0 } });
try testing.expectError(error.ZipBadCdOffset, extract(tmp.dir, fbs.seekableStream(), .{}));
}
{
var fbs = try testutil.makeZip(&zip_buf, &file_a, .{
.end = .{
.zip64 = .{ .locator_sig = [_]u8{ 1, 2, 3, 4 } },
.central_directory_size = std.math.maxInt(u32), // trigger 64
},
});
try testing.expectError(error.ZipBadLocatorSig, extract(tmp.dir, fbs.seekableStream(), .{}));
}
}