152 lines
3.6 KiB
Go
152 lines
3.6 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build linux
|
|
|
|
package unix_test
|
|
|
|
import (
|
|
"bytes"
|
|
"go/build"
|
|
"net"
|
|
"os"
|
|
"syscall"
|
|
"testing"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// TestSCMCredentials tests the sending and receiving of credentials
|
|
// (PID, UID, GID) in an ancillary message between two UNIX
|
|
// sockets. The SO_PASSCRED socket option is enabled on the sending
|
|
// socket for this to work.
|
|
func TestSCMCredentials(t *testing.T) {
|
|
socketTypeTests := []struct {
|
|
socketType int
|
|
dataLen int
|
|
}{
|
|
{
|
|
unix.SOCK_STREAM,
|
|
1,
|
|
}, {
|
|
unix.SOCK_DGRAM,
|
|
0,
|
|
},
|
|
}
|
|
|
|
for _, tt := range socketTypeTests {
|
|
if tt.socketType == unix.SOCK_DGRAM && !atLeast1p10() {
|
|
t.Log("skipping DGRAM test on pre-1.10")
|
|
continue
|
|
}
|
|
|
|
fds, err := unix.Socketpair(unix.AF_LOCAL, tt.socketType, 0)
|
|
if err != nil {
|
|
t.Fatalf("Socketpair: %v", err)
|
|
}
|
|
defer unix.Close(fds[0])
|
|
defer unix.Close(fds[1])
|
|
|
|
err = unix.SetsockoptInt(fds[0], unix.SOL_SOCKET, unix.SO_PASSCRED, 1)
|
|
if err != nil {
|
|
t.Fatalf("SetsockoptInt: %v", err)
|
|
}
|
|
|
|
srvFile := os.NewFile(uintptr(fds[0]), "server")
|
|
defer srvFile.Close()
|
|
srv, err := net.FileConn(srvFile)
|
|
if err != nil {
|
|
t.Errorf("FileConn: %v", err)
|
|
return
|
|
}
|
|
defer srv.Close()
|
|
|
|
cliFile := os.NewFile(uintptr(fds[1]), "client")
|
|
defer cliFile.Close()
|
|
cli, err := net.FileConn(cliFile)
|
|
if err != nil {
|
|
t.Errorf("FileConn: %v", err)
|
|
return
|
|
}
|
|
defer cli.Close()
|
|
|
|
var ucred unix.Ucred
|
|
if os.Getuid() != 0 {
|
|
ucred.Pid = int32(os.Getpid())
|
|
ucred.Uid = 0
|
|
ucred.Gid = 0
|
|
oob := unix.UnixCredentials(&ucred)
|
|
_, _, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
|
|
if op, ok := err.(*net.OpError); ok {
|
|
err = op.Err
|
|
}
|
|
if sys, ok := err.(*os.SyscallError); ok {
|
|
err = sys.Err
|
|
}
|
|
if err != syscall.EPERM {
|
|
t.Fatalf("WriteMsgUnix failed with %v, want EPERM", err)
|
|
}
|
|
}
|
|
|
|
ucred.Pid = int32(os.Getpid())
|
|
ucred.Uid = uint32(os.Getuid())
|
|
ucred.Gid = uint32(os.Getgid())
|
|
oob := unix.UnixCredentials(&ucred)
|
|
|
|
// On SOCK_STREAM, this is internally going to send a dummy byte
|
|
n, oobn, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
|
|
if err != nil {
|
|
t.Fatalf("WriteMsgUnix: %v", err)
|
|
}
|
|
if n != 0 {
|
|
t.Fatalf("WriteMsgUnix n = %d, want 0", n)
|
|
}
|
|
if oobn != len(oob) {
|
|
t.Fatalf("WriteMsgUnix oobn = %d, want %d", oobn, len(oob))
|
|
}
|
|
|
|
oob2 := make([]byte, 10*len(oob))
|
|
n, oobn2, flags, _, err := srv.(*net.UnixConn).ReadMsgUnix(nil, oob2)
|
|
if err != nil {
|
|
t.Fatalf("ReadMsgUnix: %v", err)
|
|
}
|
|
if flags != 0 {
|
|
t.Fatalf("ReadMsgUnix flags = 0x%x, want 0", flags)
|
|
}
|
|
if n != tt.dataLen {
|
|
t.Fatalf("ReadMsgUnix n = %d, want %d", n, tt.dataLen)
|
|
}
|
|
if oobn2 != oobn {
|
|
// without SO_PASSCRED set on the socket, ReadMsgUnix will
|
|
// return zero oob bytes
|
|
t.Fatalf("ReadMsgUnix oobn = %d, want %d", oobn2, oobn)
|
|
}
|
|
oob2 = oob2[:oobn2]
|
|
if !bytes.Equal(oob, oob2) {
|
|
t.Fatal("ReadMsgUnix oob bytes don't match")
|
|
}
|
|
|
|
scm, err := unix.ParseSocketControlMessage(oob2)
|
|
if err != nil {
|
|
t.Fatalf("ParseSocketControlMessage: %v", err)
|
|
}
|
|
newUcred, err := unix.ParseUnixCredentials(&scm[0])
|
|
if err != nil {
|
|
t.Fatalf("ParseUnixCredentials: %v", err)
|
|
}
|
|
if *newUcred != ucred {
|
|
t.Fatalf("ParseUnixCredentials = %+v, want %+v", newUcred, ucred)
|
|
}
|
|
}
|
|
}
|
|
|
|
// atLeast1p10 reports whether we are running on Go 1.10 or later.
|
|
func atLeast1p10() bool {
|
|
for _, ver := range build.Default.ReleaseTags {
|
|
if ver == "go1.10" {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|