1
0
Fork 0
mirror of https://github.com/restic/restic.git synced 2024-12-27 18:28:30 +00:00
restic/internal/selfupdate/verify.go
Alexander Neumann 6e1a3987b7 Add 'self-update' command
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.
2018-08-12 23:34:47 +02:00

187 lines
10 KiB
Go

package selfupdate
import (
"bytes"
"fmt"
"golang.org/x/crypto/openpgp"
)
var key = []byte(`
-----BEGIN PGP PUBLIC KEY BLOCK-----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=AV20
-----END PGP PUBLIC KEY BLOCK-----
`)
// GPGVerify checks the authenticity of data by verifying the signature sig,
// which must be ASCII armored (base64). When the signature matches, GPGVerify
// returns true and a nil error.
func GPGVerify(data, sig []byte) (ok bool, err error) {
keyring, err := openpgp.ReadArmoredKeyRing(bytes.NewReader(key))
if err != nil {
fmt.Printf("reading keyring failed")
return false, err
}
_, err = openpgp.CheckArmoredDetachedSignature(keyring, bytes.NewReader(data), bytes.NewReader(sig))
if err != nil {
return false, err
}
return true, nil
}