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Copy pathssh_windows.go
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105 lines (93 loc) · 2.42 KB
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//go:build windows
// +build windows
package cli
import (
"bufio"
"context"
"io"
"net"
"os"
"strconv"
"time"
gossh "golang.org/x/crypto/ssh"
"golang.org/x/xerrors"
)
func listenWindowSize(ctx context.Context) <-chan os.Signal {
windowSize := make(chan os.Signal, 3)
ticker := time.NewTicker(time.Second)
go func() {
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
}
windowSize <- nil
}
}()
return windowSize
}
func forwardGPGAgent(ctx context.Context, stderr io.Writer, sshClient *gossh.Client) (io.Closer, error) {
// Read TCP port and cookie from extra socket file. A gpg-agent socket
// file looks like the following:
//
// 49955
// abcdefghijklmnop
//
// The first line is the TCP port that gpg-agent is listening on, and
// the second line is a 16 byte cookie that MUST be sent as the first
// bytes of any connection to this port (otherwise the connection is
// closed by gpg-agent).
localSocket, err := localGPGExtraSocket(ctx)
if err != nil {
return nil, err
}
f, err := os.Open(localSocket)
if err != nil {
return nil, xerrors.Errorf("open gpg-agent-extra socket file %q: %w", localSocket, err)
}
// Scan lines from file to get port and cookie.
var (
port uint16
cookie []byte
scanner = bufio.NewScanner(f)
)
for i := 0; scanner.Scan(); i++ {
switch i {
case 0:
port64, err := strconv.ParseUint(scanner.Text(), 10, 16)
if err != nil {
return nil, xerrors.Errorf("parse gpg-agent-extra socket file %q: line 1: convert string to integer: %w", localSocket, err)
}
port = uint16(port64)
case 1:
cookie = scanner.Bytes()
if len(cookie) != 16 {
return nil, xerrors.Errorf("parse gpg-agent-extra socket file %q: line 2: expected 16 bytes, got %v bytes", localSocket, len(cookie))
}
default:
return nil, xerrors.Errorf("parse gpg-agent-extra socket file %q: file contains more than 2 lines", localSocket)
}
}
err = scanner.Err()
if err != nil {
return nil, xerrors.Errorf("parse gpg-agent-extra socket file: %q: %w", localSocket, err)
}
remoteSocket, err := remoteGPGAgentSocket(sshClient)
if err != nil {
return nil, err
}
localAddr := cookieAddr{
Addr: &net.TCPAddr{
IP: net.IPv4(127, 0, 0, 1),
Port: int(port),
},
cookie: cookie,
}
remoteAddr := &net.UnixAddr{
Name: remoteSocket,
Net: "unix",
}
return sshRemoteForward(ctx, stderr, sshClient, localAddr, remoteAddr)
}