mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-02 23:31:08 +08:00
Noah Stride
9cd01b48c8
* Add `uds` package with helper for fetching peer creds * Add gRPC transport credentials implementation * Add godoc comments * Add lint ignore for backwards compat
66 lines
1.7 KiB
Go
66 lines
1.7 KiB
Go
//go:build linux
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/*
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* Teleport
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* Copyright (C) 2024 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package uds
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import (
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"net"
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"github.com/gravitational/trace"
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"golang.org/x/sys/unix"
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)
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func getCreds(conn *net.UnixConn) (*Creds, error) {
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// Get the underlying raw conn so we can use it for syscalls.
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raw, err := conn.SyscallConn()
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if err != nil {
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return nil, trace.Wrap(err, "converting *net.UnixConn to underlying raw conn")
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}
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var (
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ucred *unix.Ucred
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rawErr error
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)
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err = raw.Control(func(fd uintptr) {
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// On Linux, we can just call Getsockopt for LOCAL_PEERCRED and we
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// get back a single ucred struct which contains all the info we need.
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ucred, err = unix.GetsockoptUcred(
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int(fd),
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unix.SOL_SOCKET,
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unix.SO_PEERCRED,
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)
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if err != nil {
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rawErr = trace.Wrap(err, "getting ucred for conn")
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return
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}
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})
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if err != nil {
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return nil, trace.Wrap(err, "calling raw control")
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}
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if rawErr != nil {
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return nil, trace.Wrap(rawErr)
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}
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return &Creds{
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PID: int(ucred.Pid),
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UID: int(ucred.Uid),
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GID: int(ucred.Gid),
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}, nil
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}
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