archive/zip: FileHeader struct lacks Unicode Path Extra Field (0x7075)

[iamnp]

What version of Go are you using (go version)?

$ go version go1.13.6 windows/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\npanin\AppData\Local\go-build
set GOENV=C:\Users\npanin\AppData\Roaming\go\env
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\GoProjects
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=C:\Users\npanin\AppData\Local\Temp\go-build726899154=/tmp/go-build -gno-record-gcc-switches

What did you do?

Tried to read ZIP file with unicode filename using archive/zip package

What did you expect to see?

FileHeader struct field to store Unicode Path Extra Field as described in 4.6.9 of https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT

What did you see instead?

No way to retrieve Unicode Path Extra Field except for manually parsing it from FileHeader.Extra field

[FedorArbuzov]

Have the same problem!!!

[seankhliao]

As the document notes, in general we would expect the unicode bit to be set and for Name and Description to be natively in utf8.
It seems fine to manually parse it out of extra for the rare cases that don't.