This repository has been archived by the owner on Dec 13, 2018. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 315
/
capabilities_linux.go
91 lines (82 loc) · 2.9 KB
/
capabilities_linux.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
// +build linux
package libcontainer
import (
"fmt"
"os"
"github.com/syndtr/gocapability/capability"
)
const allCapabilityTypes = capability.CAPS | capability.BOUNDS
var capabilityList = map[string]capability.Cap{
"SETPCAP": capability.CAP_SETPCAP,
"SYS_MODULE": capability.CAP_SYS_MODULE,
"SYS_RAWIO": capability.CAP_SYS_RAWIO,
"SYS_PACCT": capability.CAP_SYS_PACCT,
"SYS_ADMIN": capability.CAP_SYS_ADMIN,
"SYS_NICE": capability.CAP_SYS_NICE,
"SYS_RESOURCE": capability.CAP_SYS_RESOURCE,
"SYS_TIME": capability.CAP_SYS_TIME,
"SYS_TTY_CONFIG": capability.CAP_SYS_TTY_CONFIG,
"MKNOD": capability.CAP_MKNOD,
"AUDIT_WRITE": capability.CAP_AUDIT_WRITE,
"AUDIT_CONTROL": capability.CAP_AUDIT_CONTROL,
"MAC_OVERRIDE": capability.CAP_MAC_OVERRIDE,
"MAC_ADMIN": capability.CAP_MAC_ADMIN,
"NET_ADMIN": capability.CAP_NET_ADMIN,
"SYSLOG": capability.CAP_SYSLOG,
"CHOWN": capability.CAP_CHOWN,
"NET_RAW": capability.CAP_NET_RAW,
"DAC_OVERRIDE": capability.CAP_DAC_OVERRIDE,
"FOWNER": capability.CAP_FOWNER,
"DAC_READ_SEARCH": capability.CAP_DAC_READ_SEARCH,
"FSETID": capability.CAP_FSETID,
"KILL": capability.CAP_KILL,
"SETGID": capability.CAP_SETGID,
"SETUID": capability.CAP_SETUID,
"LINUX_IMMUTABLE": capability.CAP_LINUX_IMMUTABLE,
"NET_BIND_SERVICE": capability.CAP_NET_BIND_SERVICE,
"NET_BROADCAST": capability.CAP_NET_BROADCAST,
"IPC_LOCK": capability.CAP_IPC_LOCK,
"IPC_OWNER": capability.CAP_IPC_OWNER,
"SYS_CHROOT": capability.CAP_SYS_CHROOT,
"SYS_PTRACE": capability.CAP_SYS_PTRACE,
"SYS_BOOT": capability.CAP_SYS_BOOT,
"LEASE": capability.CAP_LEASE,
"SETFCAP": capability.CAP_SETFCAP,
"WAKE_ALARM": capability.CAP_WAKE_ALARM,
"BLOCK_SUSPEND": capability.CAP_BLOCK_SUSPEND,
"AUDIT_READ": capability.CAP_AUDIT_READ,
}
func newCapWhitelist(caps []string) (*whitelist, error) {
l := []capability.Cap{}
for _, c := range caps {
v, ok := capabilityList[c]
if !ok {
return nil, fmt.Errorf("unknown capability %q", c)
}
l = append(l, v)
}
pid, err := capability.NewPid(os.Getpid())
if err != nil {
return nil, err
}
return &whitelist{
keep: l,
pid: pid,
}, nil
}
type whitelist struct {
pid capability.Capabilities
keep []capability.Cap
}
// dropBoundingSet drops the capability bounding set to those specified in the whitelist.
func (w *whitelist) dropBoundingSet() error {
w.pid.Clear(capability.BOUNDS)
w.pid.Set(capability.BOUNDS, w.keep...)
return w.pid.Apply(capability.BOUNDS)
}
// drop drops all capabilities for the current process except those specified in the whitelist.
func (w *whitelist) drop() error {
w.pid.Clear(allCapabilityTypes)
w.pid.Set(allCapabilityTypes, w.keep...)
return w.pid.Apply(allCapabilityTypes)
}