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39 lines
1.1 KiB
Go
39 lines
1.1 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Socket control messages
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package syscall
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import (
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"unsafe"
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)
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// UnixCredentials encodes credentials into a socket control message
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// for sending to another process. This can be used for
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// authentication.
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func UnixCredentials(ucred *Ucred) []byte {
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buf := make([]byte, CmsgSpace(SizeofUcred))
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cmsg := (*Cmsghdr)(unsafe.Pointer(&buf[0]))
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cmsg.Level = SOL_SOCKET
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cmsg.Type = SCM_CREDENTIALS
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cmsg.SetLen(CmsgLen(SizeofUcred))
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*((*Ucred)(cmsgData(cmsg))) = *ucred
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return buf
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}
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// ParseUnixCredentials decodes a socket control message that contains
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// credentials in a Ucred structure. To receive such a message, the
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// SO_PASSCRED option must be enabled on the socket.
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func ParseUnixCredentials(msg *SocketControlMessage) (*Ucred, error) {
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if msg.Header.Level != SOL_SOCKET {
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return nil, EINVAL
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}
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if msg.Header.Type != SCM_CREDENTIALS {
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return nil, EINVAL
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}
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ucred := *(*Ucred)(unsafe.Pointer(&msg.Data[0]))
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return &ucred, nil
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}
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