Update sftp library

vendor/src/github.com/pkg/sftp/server_test.go

@@ -0,0 +1,64 @@
+package sftp
+
+import (
+	"io"
+	"testing"
+)
+
+func clientServerPair(t *testing.T) (*Client, *Server) {
+	cr, sw := io.Pipe()
+	sr, cw := io.Pipe()
+	server, err := NewServer(struct {
+		io.Reader
+		io.WriteCloser
+	}{sr, sw})
+	if err != nil {
+		t.Fatal(err)
+	}
+	go server.Serve()
+	client, err := NewClientPipe(cr, cw)
+	if err != nil {
+		t.Fatalf("%+v\n", err)
+	}
+	return client, server
+}
+
+type sshFxpTestBadExtendedPacket struct {
+	ID        uint32
+	Extension string
+	Data      string
+}
+
+func (p sshFxpTestBadExtendedPacket) id() uint32 { return p.ID }
+
+func (p sshFxpTestBadExtendedPacket) MarshalBinary() ([]byte, error) {
+	l := 1 + 4 + 4 + // type(byte) + uint32 + uint32
+		len(p.Extension) +
+		len(p.Data)
+
+	b := make([]byte, 0, l)
+	b = append(b, ssh_FXP_EXTENDED)
+	b = marshalUint32(b, p.ID)
+	b = marshalString(b, p.Extension)
+	b = marshalString(b, p.Data)
+	return b, nil
+}
+
+// test that errors are sent back when we request an invalid extended packet operation
+func TestInvalidExtendedPacket(t *testing.T) {
+	client, _ := clientServerPair(t)
+	defer client.Close()
+	badPacket := sshFxpTestBadExtendedPacket{client.nextID(), "thisDoesn'tExist", "foobar"}
+	_, _, err := client.clientConn.sendPacket(badPacket)
+	if err == nil {
+		t.Fatal("expected error from bad packet")
+	}
+
+	// try to stat a file; the client should have shut down.
+	filePath := "/etc/passwd"
+	_, err = client.Stat(filePath)
+	if err == nil {
+		t.Fatal("expected error from closed connection")
+	}
+
+}