mirror of
https://github.com/restic/restic.git
synced 2024-08-02 02:23:25 +02:00
6e1a3987b7
This commit adds a command called `self-update` which downloads the latest released version of restic from GitHub and replacing the current binary with it. It does not rely on any external program (so it'll work everywhere), but still verifies the GPG signature using the embedded GPG public key. By default, the `self-update` command is hidden behind the `selfupdate` built tag, which is only set when restic is built using `build.go`. The reason for this is that downstream distributions will then not include the command by default, so users are encouraged to use the platform-specific distribution mechanism.
74 lines
1.7 KiB
Go
74 lines
1.7 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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package packet
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import (
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"crypto"
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"encoding/binary"
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"golang.org/x/crypto/openpgp/errors"
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"golang.org/x/crypto/openpgp/s2k"
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"io"
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"strconv"
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)
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// OnePassSignature represents a one-pass signature packet. See RFC 4880,
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// section 5.4.
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type OnePassSignature struct {
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SigType SignatureType
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Hash crypto.Hash
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PubKeyAlgo PublicKeyAlgorithm
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KeyId uint64
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IsLast bool
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}
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const onePassSignatureVersion = 3
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func (ops *OnePassSignature) parse(r io.Reader) (err error) {
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var buf [13]byte
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_, err = readFull(r, buf[:])
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if err != nil {
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return
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}
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if buf[0] != onePassSignatureVersion {
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err = errors.UnsupportedError("one-pass-signature packet version " + strconv.Itoa(int(buf[0])))
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}
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var ok bool
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ops.Hash, ok = s2k.HashIdToHash(buf[2])
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if !ok {
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return errors.UnsupportedError("hash function: " + strconv.Itoa(int(buf[2])))
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}
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ops.SigType = SignatureType(buf[1])
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ops.PubKeyAlgo = PublicKeyAlgorithm(buf[3])
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ops.KeyId = binary.BigEndian.Uint64(buf[4:12])
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ops.IsLast = buf[12] != 0
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return
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}
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// Serialize marshals the given OnePassSignature to w.
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func (ops *OnePassSignature) Serialize(w io.Writer) error {
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var buf [13]byte
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buf[0] = onePassSignatureVersion
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buf[1] = uint8(ops.SigType)
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var ok bool
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buf[2], ok = s2k.HashToHashId(ops.Hash)
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if !ok {
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return errors.UnsupportedError("hash type: " + strconv.Itoa(int(ops.Hash)))
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}
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buf[3] = uint8(ops.PubKeyAlgo)
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binary.BigEndian.PutUint64(buf[4:12], ops.KeyId)
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if ops.IsLast {
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buf[12] = 1
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}
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if err := serializeHeader(w, packetTypeOnePassSignature, len(buf)); err != nil {
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return err
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}
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_, err := w.Write(buf[:])
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return err
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}
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