go1.16 (#14783)

vendor/github.com/xanzy/ssh-agent/go.mod

@@ -1,6 +1,6 @@
 module github.com/xanzy/ssh-agent
 
 require (
+	github.com/Microsoft/go-winio v0.4.14
 	golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2
-	golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0 // indirect
 )

vendor/github.com/xanzy/ssh-agent/go.sum

@@ -1,4 +1,16 @@
+github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU=
+github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
+github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2 h1:NwxKRvbkH5MsNkvOtPZi3/3kmI8CAzs3mtv+GLQMkNo=
 golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0 h1:bzeyCHgoAyjZjAhvTpks+qM7sdlh4cCSitmXeCEO3B4=
 golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b h1:ag/x1USPSsqHud38I9BAC88qdNLDHHtQ4mlgQIZPPNA=
+golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/xanzy/ssh-agent/pageant_windows.go

@@ -69,9 +69,6 @@ func winAPI(dllName, funcName string) func(...uintptr) (uintptr, uintptr, error)
 	return func(a ...uintptr) (uintptr, uintptr, error) { return proc.Call(a...) }
 }
 
-// Available returns true if Pageant is running
-func Available() bool { return pageantWindow() != 0 }
-
 // Query sends message msg to Pageant and returns response or error.
 // 'msg' is raw agent request with length prefix
 // Response is raw agent response with length prefix

vendor/github.com/xanzy/ssh-agent/sshagent_windows.go

@@ -27,17 +27,40 @@ import (
 	"net"
 	"sync"
 
+	"github.com/Microsoft/go-winio"
 	"golang.org/x/crypto/ssh/agent"
 )
 
+const (
+	sshAgentPipe = `\\.\pipe\openssh-ssh-agent`
+)
+
+// Available returns true if Pageant is running
+func Available() bool {
+	if pageantWindow() != 0 {
+		return true
+	}
+	conn, err := winio.DialPipe(sshAgentPipe, nil)
+	if err != nil {
+		return false
+	}
+	conn.Close()
+	return true
+}
+
 // New returns a new agent.Agent and the (custom) connection it uses
 // to communicate with a running pagent.exe instance (see README.md)
 func New() (agent.Agent, net.Conn, error) {
-	if !Available() {
-		return nil, nil, errors.New("SSH agent requested but Pageant not running")
+	if pageantWindow() != 0 {
+		return agent.NewClient(&conn{}), nil, nil
 	}
-
-	return agent.NewClient(&conn{}), nil, nil
+	conn, err := winio.DialPipe(sshAgentPipe, nil)
+	if err != nil {
+		return nil, nil, errors.New(
+			"SSH agent requested, but could not detect Pageant or Windows native SSH agent",
+		)
+	}
+	return agent.NewClient(conn), nil, nil
 }
 
 type conn struct {