mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-10-31 20:44:07 +00:00
125 lines
3.4 KiB
Go
125 lines
3.4 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package activitypub
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"crypto/rsa"
|
|
"crypto/x509"
|
|
"encoding/pem"
|
|
"fmt"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
user_model "code.gitea.io/gitea/models/user"
|
|
"code.gitea.io/gitea/modules/proxy"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
|
|
"github.com/go-fed/httpsig"
|
|
)
|
|
|
|
const (
|
|
// ActivityStreamsContentType const
|
|
ActivityStreamsContentType = `application/ld+json; profile="https://www.w3.org/ns/activitystreams"`
|
|
httpsigExpirationTime = 60
|
|
)
|
|
|
|
// Gets the current time as an RFC 2616 formatted string
|
|
// RFC 2616 requires RFC 1123 dates but with GMT instead of UTC
|
|
func CurrentTime() string {
|
|
return strings.ReplaceAll(time.Now().UTC().Format(time.RFC1123), "UTC", "GMT")
|
|
}
|
|
|
|
func containsRequiredHTTPHeaders(method string, headers []string) error {
|
|
var hasRequestTarget, hasDate, hasDigest bool
|
|
for _, header := range headers {
|
|
hasRequestTarget = hasRequestTarget || header == httpsig.RequestTarget
|
|
hasDate = hasDate || header == "Date"
|
|
hasDigest = hasDigest || header == "Digest"
|
|
}
|
|
if !hasRequestTarget {
|
|
return fmt.Errorf("missing http header for %s: %s", method, httpsig.RequestTarget)
|
|
} else if !hasDate {
|
|
return fmt.Errorf("missing http header for %s: Date", method)
|
|
} else if !hasDigest && method != http.MethodGet {
|
|
return fmt.Errorf("missing http header for %s: Digest", method)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Client struct
|
|
type Client struct {
|
|
client *http.Client
|
|
algs []httpsig.Algorithm
|
|
digestAlg httpsig.DigestAlgorithm
|
|
getHeaders []string
|
|
postHeaders []string
|
|
priv *rsa.PrivateKey
|
|
pubID string
|
|
}
|
|
|
|
// NewClient function
|
|
func NewClient(ctx context.Context, user *user_model.User, pubID string) (c *Client, err error) {
|
|
if err = containsRequiredHTTPHeaders(http.MethodGet, setting.Federation.GetHeaders); err != nil {
|
|
return nil, err
|
|
} else if err = containsRequiredHTTPHeaders(http.MethodPost, setting.Federation.PostHeaders); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
priv, err := GetPrivateKey(ctx, user)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
privPem, _ := pem.Decode([]byte(priv))
|
|
privParsed, err := x509.ParsePKCS1PrivateKey(privPem.Bytes)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
c = &Client{
|
|
client: &http.Client{
|
|
Transport: &http.Transport{
|
|
Proxy: proxy.Proxy(),
|
|
},
|
|
},
|
|
algs: setting.HttpsigAlgs,
|
|
digestAlg: httpsig.DigestAlgorithm(setting.Federation.DigestAlgorithm),
|
|
getHeaders: setting.Federation.GetHeaders,
|
|
postHeaders: setting.Federation.PostHeaders,
|
|
priv: privParsed,
|
|
pubID: pubID,
|
|
}
|
|
return c, err
|
|
}
|
|
|
|
// NewRequest function
|
|
func (c *Client) NewRequest(b []byte, to string) (req *http.Request, err error) {
|
|
buf := bytes.NewBuffer(b)
|
|
req, err = http.NewRequest(http.MethodPost, to, buf)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req.Header.Add("Content-Type", ActivityStreamsContentType)
|
|
req.Header.Add("Date", CurrentTime())
|
|
req.Header.Add("User-Agent", "Gitea/"+setting.AppVer)
|
|
signer, _, err := httpsig.NewSigner(c.algs, c.digestAlg, c.postHeaders, httpsig.Signature, httpsigExpirationTime)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
err = signer.SignRequest(c.priv, c.pubID, req, b)
|
|
return req, err
|
|
}
|
|
|
|
// Post function
|
|
func (c *Client) Post(b []byte, to string) (resp *http.Response, err error) {
|
|
var req *http.Request
|
|
if req, err = c.NewRequest(b, to); err != nil {
|
|
return nil, err
|
|
}
|
|
resp, err = c.client.Do(req)
|
|
return resp, err
|
|
}
|