pax_global_header00006660000000000000000000000064125225564230014520gustar00rootroot0000000000000052 comment=66ef2aa7a23ba682594e2b6f74cf40c0692b49fb golang-gocapability-dev_66ef2aa/000077500000000000000000000000001252255642300167665ustar00rootroot00000000000000golang-gocapability-dev_66ef2aa/LICENSE000066400000000000000000000024461252255642300200010ustar00rootroot00000000000000Copyright 2013 Suryandaru Triandana All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. golang-gocapability-dev_66ef2aa/capability/000077500000000000000000000000001252255642300211075ustar00rootroot00000000000000golang-gocapability-dev_66ef2aa/capability/capability.go000066400000000000000000000047211252255642300235630ustar00rootroot00000000000000// Copyright (c) 2013, Suryandaru Triandana // All rights reserved. // // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Package capability provides utilities for manipulating POSIX capabilities. package capability type Capabilities interface { // Get check whether a capability present in the given // capabilities set. The 'which' value should be one of EFFECTIVE, // PERMITTED, INHERITABLE or BOUNDING. Get(which CapType, what Cap) bool // Empty check whether all capability bits of the given capabilities // set are zero. The 'which' value should be one of EFFECTIVE, // PERMITTED, INHERITABLE or BOUNDING. Empty(which CapType) bool // Full check whether all capability bits of the given capabilities // set are one. The 'which' value should be one of EFFECTIVE, // PERMITTED, INHERITABLE or BOUNDING. Full(which CapType) bool // Set sets capabilities of the given capabilities sets. The // 'which' value should be one or combination (OR'ed) of EFFECTIVE, // PERMITTED, INHERITABLE or BOUNDING. Set(which CapType, caps ...Cap) // Unset unsets capabilities of the given capabilities sets. The // 'which' value should be one or combination (OR'ed) of EFFECTIVE, // PERMITTED, INHERITABLE or BOUNDING. Unset(which CapType, caps ...Cap) // Fill sets all bits of the given capabilities kind to one. The // 'kind' value should be one or combination (OR'ed) of CAPS or // BOUNDS. Fill(kind CapType) // Clear sets all bits of the given capabilities kind to zero. The // 'kind' value should be one or combination (OR'ed) of CAPS or // BOUNDS. Clear(kind CapType) // String return current capabilities state of the given capabilities // set as string. The 'which' value should be one of EFFECTIVE, // PERMITTED, INHERITABLE or BOUNDING. StringCap(which CapType) string // String return current capabilities state as string. String() string // Load load actual capabilities value. This will overwrite all // outstanding changes. Load() error // Apply apply the capabilities settings, so all changes will take // effect. Apply(kind CapType) error } // NewPid create new initialized Capabilities object for given pid when it // is nonzero, or for the current pid if pid is 0 func NewPid(pid int) (Capabilities, error) { return newPid(pid) } // NewFile create new initialized Capabilities object for given named file. func NewFile(name string) (Capabilities, error) { return newFile(name) } golang-gocapability-dev_66ef2aa/capability/capability_linux.go000066400000000000000000000265111252255642300250030ustar00rootroot00000000000000// Copyright (c) 2013, Suryandaru Triandana // All rights reserved. // // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. package capability import ( "bufio" "errors" "fmt" "io" "os" "strings" "syscall" ) var errUnknownVers = errors.New("unknown capability version") const ( linuxCapVer1 = 0x19980330 linuxCapVer2 = 0x20071026 linuxCapVer3 = 0x20080522 ) var ( capVers uint32 capLastCap Cap ) func init() { var hdr capHeader capget(&hdr, nil) capVers = hdr.version if initLastCap() == nil { CAP_LAST_CAP = capLastCap if capLastCap > 31 { capUpperMask = (uint32(1) << (uint(capLastCap) - 31)) - 1 } else { capUpperMask = 0 } } } func initLastCap() error { if capLastCap != 0 { return nil } f, err := os.Open("/proc/sys/kernel/cap_last_cap") if err != nil { return err } defer f.Close() var b []byte = make([]byte, 11) _, err = f.Read(b) if err != nil { return err } fmt.Sscanf(string(b), "%d", &capLastCap) return nil } func mkStringCap(c Capabilities, which CapType) (ret string) { for i, first := Cap(0), true; i <= CAP_LAST_CAP; i++ { if !c.Get(which, i) { continue } if first { first = false } else { ret += ", " } ret += i.String() } return } func mkString(c Capabilities, max CapType) (ret string) { ret = "{" for i := CapType(1); i <= max; i <<= 1 { ret += " " + i.String() + "=\"" if c.Empty(i) { ret += "empty" } else if c.Full(i) { ret += "full" } else { ret += c.StringCap(i) } ret += "\"" } ret += " }" return } func newPid(pid int) (c Capabilities, err error) { switch capVers { case linuxCapVer1: p := new(capsV1) p.hdr.version = capVers p.hdr.pid = pid c = p case linuxCapVer2, linuxCapVer3: p := new(capsV3) p.hdr.version = capVers p.hdr.pid = pid c = p default: err = errUnknownVers return } err = c.Load() if err != nil { c = nil } return } type capsV1 struct { hdr capHeader data capData } func (c *capsV1) Get(which CapType, what Cap) bool { if what > 32 { return false } switch which { case EFFECTIVE: return (1< 32 { continue } if which&EFFECTIVE != 0 { c.data.effective |= 1 << uint(what) } if which&PERMITTED != 0 { c.data.permitted |= 1 << uint(what) } if which&INHERITABLE != 0 { c.data.inheritable |= 1 << uint(what) } } } func (c *capsV1) Unset(which CapType, caps ...Cap) { for _, what := range caps { if what > 32 { continue } if which&EFFECTIVE != 0 { c.data.effective &= ^(1 << uint(what)) } if which&PERMITTED != 0 { c.data.permitted &= ^(1 << uint(what)) } if which&INHERITABLE != 0 { c.data.inheritable &= ^(1 << uint(what)) } } } func (c *capsV1) Fill(kind CapType) { if kind&CAPS == CAPS { c.data.effective = 0x7fffffff c.data.permitted = 0x7fffffff c.data.inheritable = 0 } } func (c *capsV1) Clear(kind CapType) { if kind&CAPS == CAPS { c.data.effective = 0 c.data.permitted = 0 c.data.inheritable = 0 } } func (c *capsV1) StringCap(which CapType) (ret string) { return mkStringCap(c, which) } func (c *capsV1) String() (ret string) { return mkString(c, BOUNDING) } func (c *capsV1) Load() (err error) { return capget(&c.hdr, &c.data) } func (c *capsV1) Apply(kind CapType) error { if kind&CAPS == CAPS { return capset(&c.hdr, &c.data) } return nil } type capsV3 struct { hdr capHeader data [2]capData bounds [2]uint32 } func (c *capsV3) Get(which CapType, what Cap) bool { var i uint if what > 31 { i = uint(what) >> 5 what %= 32 } switch which { case EFFECTIVE: return (1< 31 { i = uint(what) >> 5 what %= 32 } if which&EFFECTIVE != 0 { c.data[i].effective |= 1 << uint(what) } if which&PERMITTED != 0 { c.data[i].permitted |= 1 << uint(what) } if which&INHERITABLE != 0 { c.data[i].inheritable |= 1 << uint(what) } if which&BOUNDING != 0 { c.bounds[i] |= 1 << uint(what) } } } func (c *capsV3) Unset(which CapType, caps ...Cap) { for _, what := range caps { var i uint if what > 31 { i = uint(what) >> 5 what %= 32 } if which&EFFECTIVE != 0 { c.data[i].effective &= ^(1 << uint(what)) } if which&PERMITTED != 0 { c.data[i].permitted &= ^(1 << uint(what)) } if which&INHERITABLE != 0 { c.data[i].inheritable &= ^(1 << uint(what)) } if which&BOUNDING != 0 { c.bounds[i] &= ^(1 << uint(what)) } } } func (c *capsV3) Fill(kind CapType) { if kind&CAPS == CAPS { c.data[0].effective = 0xffffffff c.data[0].permitted = 0xffffffff c.data[0].inheritable = 0 c.data[1].effective = 0xffffffff c.data[1].permitted = 0xffffffff c.data[1].inheritable = 0 } if kind&BOUNDS == BOUNDS { c.bounds[0] = 0xffffffff c.bounds[1] = 0xffffffff } } func (c *capsV3) Clear(kind CapType) { if kind&CAPS == CAPS { c.data[0].effective = 0 c.data[0].permitted = 0 c.data[0].inheritable = 0 c.data[1].effective = 0 c.data[1].permitted = 0 c.data[1].inheritable = 0 } if kind&BOUNDS == BOUNDS { c.bounds[0] = 0 c.bounds[1] = 0 } } func (c *capsV3) StringCap(which CapType) (ret string) { return mkStringCap(c, which) } func (c *capsV3) String() (ret string) { return mkString(c, BOUNDING) } func (c *capsV3) Load() (err error) { err = capget(&c.hdr, &c.data[0]) if err != nil { return } var status_path string if c.hdr.pid == 0 { status_path = fmt.Sprintf("/proc/self/status") } else { status_path = fmt.Sprintf("/proc/%d/status", c.hdr.pid) } f, err := os.Open(status_path) if err != nil { return } b := bufio.NewReader(f) for { line, e := b.ReadString('\n') if e != nil { if e != io.EOF { err = e } break } if strings.HasPrefix(line, "CapB") { fmt.Sscanf(line[4:], "nd: %08x%08x", &c.bounds[1], &c.bounds[0]) break } } f.Close() return } func (c *capsV3) Apply(kind CapType) (err error) { if kind&BOUNDS == BOUNDS { var data [2]capData err = capget(&c.hdr, &data[0]) if err != nil { return } if (1< 31 { if c.data.version == 1 { return false } i = uint(what) >> 5 what %= 32 } switch which { case EFFECTIVE: return (1< 31 { if c.data.version == 1 { continue } i = uint(what) >> 5 what %= 32 } if which&EFFECTIVE != 0 { c.data.effective[i] |= 1 << uint(what) } if which&PERMITTED != 0 { c.data.data[i].permitted |= 1 << uint(what) } if which&INHERITABLE != 0 { c.data.data[i].inheritable |= 1 << uint(what) } } } func (c *capsFile) Unset(which CapType, caps ...Cap) { for _, what := range caps { var i uint if what > 31 { if c.data.version == 1 { continue } i = uint(what) >> 5 what %= 32 } if which&EFFECTIVE != 0 { c.data.effective[i] &= ^(1 << uint(what)) } if which&PERMITTED != 0 { c.data.data[i].permitted &= ^(1 << uint(what)) } if which&INHERITABLE != 0 { c.data.data[i].inheritable &= ^(1 << uint(what)) } } } func (c *capsFile) Fill(kind CapType) { if kind&CAPS == CAPS { c.data.effective[0] = 0xffffffff c.data.data[0].permitted = 0xffffffff c.data.data[0].inheritable = 0 if c.data.version == 2 { c.data.effective[1] = 0xffffffff c.data.data[1].permitted = 0xffffffff c.data.data[1].inheritable = 0 } } } func (c *capsFile) Clear(kind CapType) { if kind&CAPS == CAPS { c.data.effective[0] = 0 c.data.data[0].permitted = 0 c.data.data[0].inheritable = 0 if c.data.version == 2 { c.data.effective[1] = 0 c.data.data[1].permitted = 0 c.data.data[1].inheritable = 0 } } } func (c *capsFile) StringCap(which CapType) (ret string) { return mkStringCap(c, which) } func (c *capsFile) String() (ret string) { return mkString(c, INHERITABLE) } func (c *capsFile) Load() (err error) { return getVfsCap(c.path, &c.data) } func (c *capsFile) Apply(kind CapType) (err error) { if kind&CAPS == CAPS { return setVfsCap(c.path, &c.data) } return } golang-gocapability-dev_66ef2aa/capability/capability_noop.go000066400000000000000000000006601252255642300246140ustar00rootroot00000000000000// Copyright (c) 2013, Suryandaru Triandana // 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 capability import "errors" func newPid(pid int) (Capabilities, error) { return nil, errors.New("not supported") } func newFile(path string) (Capabilities, error) { return nil, errors.New("not supported") } golang-gocapability-dev_66ef2aa/capability/capability_test.go000066400000000000000000000044731252255642300246260ustar00rootroot00000000000000// Copyright (c) 2013, Suryandaru Triandana // All rights reserved. // // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. package capability import "testing" func TestState(t *testing.T) { testEmpty := func(name string, c Capabilities, whats CapType) { for i := CapType(1); i <= BOUNDING; i <<= 1 { if (i&whats) != 0 && !c.Empty(i) { t.Errorf(name+": capabilities set %q wasn't empty", i) } } } testFull := func(name string, c Capabilities, whats CapType) { for i := CapType(1); i <= BOUNDING; i <<= 1 { if (i&whats) != 0 && !c.Full(i) { t.Errorf(name+": capabilities set %q wasn't full", i) } } } testPartial := func(name string, c Capabilities, whats CapType) { for i := CapType(1); i <= BOUNDING; i <<= 1 { if (i&whats) != 0 && (c.Empty(i) || c.Full(i)) { t.Errorf(name+": capabilities set %q wasn't partial", i) } } } testGet := func(name string, c Capabilities, whats CapType, max Cap) { for i := CapType(1); i <= BOUNDING; i <<= 1 { if (i & whats) == 0 { continue } for j := Cap(0); j <= max; j++ { if !c.Get(i, j) { t.Errorf(name+": capability %q wasn't found on %q", j, i) } } } } capf := new(capsFile) capf.data.version = 2 for _, tc := range []struct { name string c Capabilities sets CapType max Cap }{ {"v1", new(capsV1), EFFECTIVE | PERMITTED, CAP_AUDIT_CONTROL}, {"v3", new(capsV3), EFFECTIVE | PERMITTED | BOUNDING, CAP_LAST_CAP}, {"file_v1", new(capsFile), EFFECTIVE | PERMITTED, CAP_AUDIT_CONTROL}, {"file_v2", capf, EFFECTIVE | PERMITTED, CAP_LAST_CAP}, } { testEmpty(tc.name, tc.c, tc.sets) tc.c.Fill(CAPS | BOUNDS) testFull(tc.name, tc.c, tc.sets) testGet(tc.name, tc.c, tc.sets, tc.max) tc.c.Clear(CAPS | BOUNDS) testEmpty(tc.name, tc.c, tc.sets) for i := CapType(1); i <= BOUNDING; i <<= 1 { for j := Cap(0); j <= CAP_LAST_CAP; j++ { tc.c.Set(i, j) } } testFull(tc.name, tc.c, tc.sets) testGet(tc.name, tc.c, tc.sets, tc.max) for i := CapType(1); i <= BOUNDING; i <<= 1 { for j := Cap(0); j <= CAP_LAST_CAP; j++ { tc.c.Unset(i, j) } } testEmpty(tc.name, tc.c, tc.sets) tc.c.Set(PERMITTED, CAP_CHOWN) testPartial(tc.name, tc.c, PERMITTED) tc.c.Clear(CAPS | BOUNDS) testEmpty(tc.name, tc.c, tc.sets) } } golang-gocapability-dev_66ef2aa/capability/enum.go000066400000000000000000000207171252255642300224110ustar00rootroot00000000000000// Copyright (c) 2013, Suryandaru Triandana // All rights reserved. // // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. package capability type CapType uint func (c CapType) String() string { switch c { case EFFECTIVE: return "effective" case PERMITTED: return "permitted" case INHERITABLE: return "inheritable" case BOUNDING: return "bounding" case CAPS: return "caps" } return "unknown" } const ( EFFECTIVE CapType = 1 << iota PERMITTED INHERITABLE BOUNDING CAPS = EFFECTIVE | PERMITTED | INHERITABLE BOUNDS = BOUNDING ) //go:generate go run enumgen/gen.go type Cap int // POSIX-draft defined capabilities. const ( // In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this // overrides the restriction of changing file ownership and group // ownership. CAP_CHOWN = Cap(0) // Override all DAC access, including ACL execute access if // [_POSIX_ACL] is defined. Excluding DAC access covered by // CAP_LINUX_IMMUTABLE. CAP_DAC_OVERRIDE = Cap(1) // Overrides all DAC restrictions regarding read and search on files // and directories, including ACL restrictions if [_POSIX_ACL] is // defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE. CAP_DAC_READ_SEARCH = Cap(2) // Overrides all restrictions about allowed operations on files, where // file owner ID must be equal to the user ID, except where CAP_FSETID // is applicable. It doesn't override MAC and DAC restrictions. CAP_FOWNER = Cap(3) // Overrides the following restrictions that the effective user ID // shall match the file owner ID when setting the S_ISUID and S_ISGID // bits on that file; that the effective group ID (or one of the // supplementary group IDs) shall match the file owner ID when setting // the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are // cleared on successful return from chown(2) (not implemented). CAP_FSETID = Cap(4) // Overrides the restriction that the real or effective user ID of a // process sending a signal must match the real or effective user ID // of the process receiving the signal. CAP_KILL = Cap(5) // Allows setgid(2) manipulation // Allows setgroups(2) // Allows forged gids on socket credentials passing. CAP_SETGID = Cap(6) // Allows set*uid(2) manipulation (including fsuid). // Allows forged pids on socket credentials passing. CAP_SETUID = Cap(7) // Linux-specific capabilities // Without VFS support for capabilities: // Transfer any capability in your permitted set to any pid, // remove any capability in your permitted set from any pid // With VFS support for capabilities (neither of above, but) // Add any capability from current's capability bounding set // to the current process' inheritable set // Allow taking bits out of capability bounding set // Allow modification of the securebits for a process CAP_SETPCAP = Cap(8) // Allow modification of S_IMMUTABLE and S_APPEND file attributes CAP_LINUX_IMMUTABLE = Cap(9) // Allows binding to TCP/UDP sockets below 1024 // Allows binding to ATM VCIs below 32 CAP_NET_BIND_SERVICE = Cap(10) // Allow broadcasting, listen to multicast CAP_NET_BROADCAST = Cap(11) // Allow interface configuration // Allow administration of IP firewall, masquerading and accounting // Allow setting debug option on sockets // Allow modification of routing tables // Allow setting arbitrary process / process group ownership on // sockets // Allow binding to any address for transparent proxying (also via NET_RAW) // Allow setting TOS (type of service) // Allow setting promiscuous mode // Allow clearing driver statistics // Allow multicasting // Allow read/write of device-specific registers // Allow activation of ATM control sockets CAP_NET_ADMIN = Cap(12) // Allow use of RAW sockets // Allow use of PACKET sockets // Allow binding to any address for transparent proxying (also via NET_ADMIN) CAP_NET_RAW = Cap(13) // Allow locking of shared memory segments // Allow mlock and mlockall (which doesn't really have anything to do // with IPC) CAP_IPC_LOCK = Cap(14) // Override IPC ownership checks CAP_IPC_OWNER = Cap(15) // Insert and remove kernel modules - modify kernel without limit CAP_SYS_MODULE = Cap(16) // Allow ioperm/iopl access // Allow sending USB messages to any device via /proc/bus/usb CAP_SYS_RAWIO = Cap(17) // Allow use of chroot() CAP_SYS_CHROOT = Cap(18) // Allow ptrace() of any process CAP_SYS_PTRACE = Cap(19) // Allow configuration of process accounting CAP_SYS_PACCT = Cap(20) // Allow configuration of the secure attention key // Allow administration of the random device // Allow examination and configuration of disk quotas // Allow setting the domainname // Allow setting the hostname // Allow calling bdflush() // Allow mount() and umount(), setting up new smb connection // Allow some autofs root ioctls // Allow nfsservctl // Allow VM86_REQUEST_IRQ // Allow to read/write pci config on alpha // Allow irix_prctl on mips (setstacksize) // Allow flushing all cache on m68k (sys_cacheflush) // Allow removing semaphores // Used instead of CAP_CHOWN to "chown" IPC message queues, semaphores // and shared memory // Allow locking/unlocking of shared memory segment // Allow turning swap on/off // Allow forged pids on socket credentials passing // Allow setting readahead and flushing buffers on block devices // Allow setting geometry in floppy driver // Allow turning DMA on/off in xd driver // Allow administration of md devices (mostly the above, but some // extra ioctls) // Allow tuning the ide driver // Allow access to the nvram device // Allow administration of apm_bios, serial and bttv (TV) device // Allow manufacturer commands in isdn CAPI support driver // Allow reading non-standardized portions of pci configuration space // Allow DDI debug ioctl on sbpcd driver // Allow setting up serial ports // Allow sending raw qic-117 commands // Allow enabling/disabling tagged queuing on SCSI controllers and sending // arbitrary SCSI commands // Allow setting encryption key on loopback filesystem // Allow setting zone reclaim policy CAP_SYS_ADMIN = Cap(21) // Allow use of reboot() CAP_SYS_BOOT = Cap(22) // Allow raising priority and setting priority on other (different // UID) processes // Allow use of FIFO and round-robin (realtime) scheduling on own // processes and setting the scheduling algorithm used by another // process. // Allow setting cpu affinity on other processes CAP_SYS_NICE = Cap(23) // Override resource limits. Set resource limits. // Override quota limits. // Override reserved space on ext2 filesystem // Modify data journaling mode on ext3 filesystem (uses journaling // resources) // NOTE: ext2 honors fsuid when checking for resource overrides, so // you can override using fsuid too // Override size restrictions on IPC message queues // Allow more than 64hz interrupts from the real-time clock // Override max number of consoles on console allocation // Override max number of keymaps CAP_SYS_RESOURCE = Cap(24) // Allow manipulation of system clock // Allow irix_stime on mips // Allow setting the real-time clock CAP_SYS_TIME = Cap(25) // Allow configuration of tty devices // Allow vhangup() of tty CAP_SYS_TTY_CONFIG = Cap(26) // Allow the privileged aspects of mknod() CAP_MKNOD = Cap(27) // Allow taking of leases on files CAP_LEASE = Cap(28) CAP_AUDIT_WRITE = Cap(29) CAP_AUDIT_CONTROL = Cap(30) CAP_SETFCAP = Cap(31) // Override MAC access. // The base kernel enforces no MAC policy. // An LSM may enforce a MAC policy, and if it does and it chooses // to implement capability based overrides of that policy, this is // the capability it should use to do so. CAP_MAC_OVERRIDE = Cap(32) // Allow MAC configuration or state changes. // The base kernel requires no MAC configuration. // An LSM may enforce a MAC policy, and if it does and it chooses // to implement capability based checks on modifications to that // policy or the data required to maintain it, this is the // capability it should use to do so. CAP_MAC_ADMIN = Cap(33) // Allow configuring the kernel's syslog (printk behaviour) CAP_SYSLOG = Cap(34) // Allow triggering something that will wake the system CAP_WAKE_ALARM = Cap(35) // Allow preventing system suspends CAP_BLOCK_SUSPEND = Cap(36) // Allow reading audit messages from the kernel CAP_AUDIT_READ = Cap(37) ) var ( // Highest valid capability of the running kernel. CAP_LAST_CAP = Cap(63) capUpperMask = ^uint32(0) ) golang-gocapability-dev_66ef2aa/capability/enum_gen.go000066400000000000000000000047351252255642300232440ustar00rootroot00000000000000// generated file; DO NOT EDIT - use go generate in directory with source package capability func (c Cap) String() string { switch c { case CAP_CHOWN: return "chown" case CAP_DAC_OVERRIDE: return "dac_override" case CAP_DAC_READ_SEARCH: return "dac_read_search" case CAP_FOWNER: return "fowner" case CAP_FSETID: return "fsetid" case CAP_KILL: return "kill" case CAP_SETGID: return "setgid" case CAP_SETUID: return "setuid" case CAP_SETPCAP: return "setpcap" case CAP_LINUX_IMMUTABLE: return "linux_immutable" case CAP_NET_BIND_SERVICE: return "net_bind_service" case CAP_NET_BROADCAST: return "net_broadcast" case CAP_NET_ADMIN: return "net_admin" case CAP_NET_RAW: return "net_raw" case CAP_IPC_LOCK: return "ipc_lock" case CAP_IPC_OWNER: return "ipc_owner" case CAP_SYS_MODULE: return "sys_module" case CAP_SYS_RAWIO: return "sys_rawio" case CAP_SYS_CHROOT: return "sys_chroot" case CAP_SYS_PTRACE: return "sys_ptrace" case CAP_SYS_PACCT: return "sys_pacct" case CAP_SYS_ADMIN: return "sys_admin" case CAP_SYS_BOOT: return "sys_boot" case CAP_SYS_NICE: return "sys_nice" case CAP_SYS_RESOURCE: return "sys_resource" case CAP_SYS_TIME: return "sys_time" case CAP_SYS_TTY_CONFIG: return "sys_tty_config" case CAP_MKNOD: return "mknod" case CAP_LEASE: return "lease" case CAP_AUDIT_WRITE: return "audit_write" case CAP_AUDIT_CONTROL: return "audit_control" case CAP_SETFCAP: return "setfcap" case CAP_MAC_OVERRIDE: return "mac_override" case CAP_MAC_ADMIN: return "mac_admin" case CAP_SYSLOG: return "syslog" case CAP_WAKE_ALARM: return "wake_alarm" case CAP_BLOCK_SUSPEND: return "block_suspend" case CAP_AUDIT_READ: return "audit_read" } return "unknown" } // List returns list of all supported capabilities func List() []Cap { return []Cap{ CAP_CHOWN, CAP_DAC_OVERRIDE, CAP_DAC_READ_SEARCH, CAP_FOWNER, CAP_FSETID, CAP_KILL, CAP_SETGID, CAP_SETUID, CAP_SETPCAP, CAP_LINUX_IMMUTABLE, CAP_NET_BIND_SERVICE, CAP_NET_BROADCAST, CAP_NET_ADMIN, CAP_NET_RAW, CAP_IPC_LOCK, CAP_IPC_OWNER, CAP_SYS_MODULE, CAP_SYS_RAWIO, CAP_SYS_CHROOT, CAP_SYS_PTRACE, CAP_SYS_PACCT, CAP_SYS_ADMIN, CAP_SYS_BOOT, CAP_SYS_NICE, CAP_SYS_RESOURCE, CAP_SYS_TIME, CAP_SYS_TTY_CONFIG, CAP_MKNOD, CAP_LEASE, CAP_AUDIT_WRITE, CAP_AUDIT_CONTROL, CAP_SETFCAP, CAP_MAC_OVERRIDE, CAP_MAC_ADMIN, CAP_SYSLOG, CAP_WAKE_ALARM, CAP_BLOCK_SUSPEND, CAP_AUDIT_READ, } } golang-gocapability-dev_66ef2aa/capability/enumgen/000077500000000000000000000000001252255642300225455ustar00rootroot00000000000000golang-gocapability-dev_66ef2aa/capability/enumgen/gen.go000066400000000000000000000040071252255642300236460ustar00rootroot00000000000000package main import ( "bytes" "fmt" "go/ast" "go/format" "go/parser" "go/token" "io/ioutil" "log" "os" "strings" ) const fileName = "enum.go" const genName = "enum_gen.go" type generator struct { buf bytes.Buffer caps []string } func (g *generator) writeHeader() { g.buf.WriteString("// generated file; DO NOT EDIT - use go generate in directory with source\n") g.buf.WriteString("\n") g.buf.WriteString("package capability") } func (g *generator) writeStringFunc() { g.buf.WriteString("\n") g.buf.WriteString("func (c Cap) String() string {\n") g.buf.WriteString("switch c {\n") for _, cap := range g.caps { fmt.Fprintf(&g.buf, "case %s:\n", cap) fmt.Fprintf(&g.buf, "return \"%s\"\n", strings.ToLower(cap[4:])) } g.buf.WriteString("}\n") g.buf.WriteString("return \"unknown\"\n") g.buf.WriteString("}\n") } func (g *generator) writeListFunc() { g.buf.WriteString("\n") g.buf.WriteString("// List returns list of all supported capabilities\n") g.buf.WriteString("func List() []Cap {\n") g.buf.WriteString("return []Cap{\n") for _, cap := range g.caps { fmt.Fprintf(&g.buf, "%s,\n", cap) } g.buf.WriteString("}\n") g.buf.WriteString("}\n") } func main() { fs := token.NewFileSet() parsedFile, err := parser.ParseFile(fs, fileName, nil, 0) if err != nil { log.Fatal(err) } var caps []string for _, decl := range parsedFile.Decls { decl, ok := decl.(*ast.GenDecl) if !ok || decl.Tok != token.CONST { continue } for _, spec := range decl.Specs { vspec := spec.(*ast.ValueSpec) name := vspec.Names[0].Name if strings.HasPrefix(name, "CAP_") { caps = append(caps, name) } } } g := &generator{caps: caps} g.writeHeader() g.writeStringFunc() g.writeListFunc() src, err := format.Source(g.buf.Bytes()) if err != nil { fmt.Println("generated invalid Go code") fmt.Println(g.buf.String()) log.Fatal(err) } fi, err := os.Stat(fileName) if err != nil { log.Fatal(err) } if err := ioutil.WriteFile(genName, src, fi.Mode().Perm()); err != nil { log.Fatal(err) } } golang-gocapability-dev_66ef2aa/capability/syscall_linux.go000066400000000000000000000062321252255642300243320ustar00rootroot00000000000000// Copyright (c) 2013, Suryandaru Triandana // All rights reserved. // // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. package capability import ( "syscall" "unsafe" ) type capHeader struct { version uint32 pid int } type capData struct { effective uint32 permitted uint32 inheritable uint32 } func capget(hdr *capHeader, data *capData) (err error) { _, _, e1 := syscall.Syscall(syscall.SYS_CAPGET, uintptr(unsafe.Pointer(hdr)), uintptr(unsafe.Pointer(data)), 0) if e1 != 0 { err = e1 } return } func capset(hdr *capHeader, data *capData) (err error) { _, _, e1 := syscall.Syscall(syscall.SYS_CAPSET, uintptr(unsafe.Pointer(hdr)), uintptr(unsafe.Pointer(data)), 0) if e1 != 0 { err = e1 } return } func prctl(option int, arg2, arg3, arg4, arg5 uintptr) (err error) { _, _, e1 := syscall.Syscall6(syscall.SYS_PRCTL, uintptr(option), arg2, arg3, arg4, arg5, 0) if e1 != 0 { err = e1 } return } const ( vfsXattrName = "security.capability" vfsCapVerMask = 0xff000000 vfsCapVer1 = 0x01000000 vfsCapVer2 = 0x02000000 vfsCapFlagMask = ^vfsCapVerMask vfsCapFlageffective = 0x000001 vfscapDataSizeV1 = 4 * (1 + 2*1) vfscapDataSizeV2 = 4 * (1 + 2*2) ) type vfscapData struct { magic uint32 data [2]struct { permitted uint32 inheritable uint32 } effective [2]uint32 version int8 } var ( _vfsXattrName *byte ) func init() { _vfsXattrName, _ = syscall.BytePtrFromString(vfsXattrName) } func getVfsCap(path string, dest *vfscapData) (err error) { var _p0 *byte _p0, err = syscall.BytePtrFromString(path) if err != nil { return } r0, _, e1 := syscall.Syscall6(syscall.SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_vfsXattrName)), uintptr(unsafe.Pointer(dest)), vfscapDataSizeV2, 0, 0) if e1 != 0 { err = e1 } switch dest.magic & vfsCapVerMask { case vfsCapVer1: dest.version = 1 if r0 != vfscapDataSizeV1 { return syscall.EINVAL } dest.data[1].permitted = 0 dest.data[1].inheritable = 0 case vfsCapVer2: dest.version = 2 if r0 != vfscapDataSizeV2 { return syscall.EINVAL } default: return syscall.EINVAL } if dest.magic&vfsCapFlageffective != 0 { dest.effective[0] = dest.data[0].permitted | dest.data[0].inheritable dest.effective[1] = dest.data[1].permitted | dest.data[1].inheritable } else { dest.effective[0] = 0 dest.effective[1] = 0 } return } func setVfsCap(path string, data *vfscapData) (err error) { var _p0 *byte _p0, err = syscall.BytePtrFromString(path) if err != nil { return } var size uintptr if data.version == 1 { data.magic = vfsCapVer1 size = vfscapDataSizeV1 } else if data.version == 2 { data.magic = vfsCapVer2 if data.effective[0] != 0 || data.effective[1] != 0 { data.magic |= vfsCapFlageffective data.data[0].permitted |= data.effective[0] data.data[1].permitted |= data.effective[1] } size = vfscapDataSizeV2 } else { return syscall.EINVAL } _, _, e1 := syscall.Syscall6(syscall.SYS_SETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_vfsXattrName)), uintptr(unsafe.Pointer(data)), size, 0, 0) if e1 != 0 { err = e1 } return }