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forgejo/modules/setting/federation.go
Gergely Nagy cd17eb0fa7
activitypub: Sign the Host header too
Mastodon with `AUTHORIZED_FETCH` enabled requires the `Host` header to
be signed too, add it to the default for `setting.Federation.GetHeaders`
and `setting.Federation.PostHeaders`.

For this to work, we need to sign the request later: not immediately
after `NewRequest`, but just before sending them out with `client.Do`.
Doing so also lets us use `setting.Federation.GetHeaders` (we were using
`.PostHeaders` even for GET requests before).

Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
2024-08-04 23:57:48 +02:00

51 lines
1.5 KiB
Go

// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package setting
import (
"code.gitea.io/gitea/modules/log"
"github.com/go-fed/httpsig"
)
// Federation settings
var (
Federation = struct {
Enabled bool
ShareUserStatistics bool
MaxSize int64
Algorithms []string
DigestAlgorithm string
GetHeaders []string
PostHeaders []string
}{
Enabled: false,
ShareUserStatistics: true,
MaxSize: 4,
Algorithms: []string{"rsa-sha256", "rsa-sha512", "ed25519"},
DigestAlgorithm: "SHA-256",
GetHeaders: []string{"(request-target)", "Date", "Host"},
PostHeaders: []string{"(request-target)", "Date", "Host", "Digest"},
}
)
// HttpsigAlgs is a constant slice of httpsig algorithm objects
var HttpsigAlgs []httpsig.Algorithm
func loadFederationFrom(rootCfg ConfigProvider) {
if err := rootCfg.Section("federation").MapTo(&Federation); err != nil {
log.Fatal("Failed to map Federation settings: %v", err)
} else if !httpsig.IsSupportedDigestAlgorithm(Federation.DigestAlgorithm) {
log.Fatal("unsupported digest algorithm: %s", Federation.DigestAlgorithm)
return
}
// Get MaxSize in bytes instead of MiB
Federation.MaxSize = 1 << 20 * Federation.MaxSize
HttpsigAlgs = make([]httpsig.Algorithm, len(Federation.Algorithms))
for i, alg := range Federation.Algorithms {
HttpsigAlgs[i] = httpsig.Algorithm(alg)
}
}