Description
Go version
go version go1.22.1 darwin/arm64
Output of go env in your module/workspace:
GO111MODULE=''
GOARCH='arm64'
GOBIN=''
GOCACHE='/Users/max/Library/Caches/go-build'
GOENV='/Users/max/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/max/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='darwin'
GOPATH='/Users/max/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/opt/homebrew/Cellar/go/1.22.1/libexec'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/opt/homebrew/Cellar/go/1.22.1/libexec/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.22.1'
GCCGO='gccgo'
AR='ar'
CC='cc'
CXX='c++'
CGO_ENABLED='1'
GOMOD='/Users/max/Code/sandbox/ssh-authentication-bug/client/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/1m/z4zys8c11n92mxs598p0hc1r0000gn/T/go-build3310712318=/tmp/go-build -gno-record-gcc-switches -fno-common'What did you do?
I'm building a SSH server using the Node.js library https://github.com/mscdex/ssh2 and I'm building the SSH client using the x/crypto/ssh library. The client aborts the SSH handshake when using the publickey authentication method.
I built an example project including server and client here: https://github.com/0x7f/ssh-authentication-bug
What did you see happen?
Even though the server offers [publickey] authentication methods when initiating the handshake with authentication method none, the client fails to connect. The client uses the publickey method and offers the key, and the server accepts the key, but the client still prints the error:
2024/03/21 09:07:40 Failed to dial: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain
What did you expect to see?
When using OpenSSH client, it connects successfully. I would expect the same from the Golang x/crypto/ssh client.
Maybe related to #64785