// Copyright (C) 2018-2021 LEAP // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program. If not, see . package bonafide import ( "crypto/tls" "crypto/x509" "encoding/json" "errors" "fmt" "io" "io/ioutil" "log" "net/http" "strings" "time" "0xacab.org/leap/bitmask-vpn/pkg/config" ) const ( secondsPerHour = 60 * 60 retryFetchJSONSeconds = 15 ) const ( certPathv1 = "1/cert" certPathv3 = "3/cert" authPathv3 = "3/auth" ) type Bonafide struct { client httpClient eip *eipService tzOffsetHours int gateways *gatewayPool maxGateways int auth authentication token []byte } type openvpnConfig map[string]interface{} type httpClient interface { Post(url, contentType string, body io.Reader) (resp *http.Response, err error) Do(req *http.Request) (*http.Response, error) } type geoGateway struct { Host string `json:"host"` Fullness float64 `json:"fullness"` Overload bool `json:"overload"` } type geoLocation struct { IPAddress string `json:"ip"` Country string `json:"cc"` City string `json:"city"` Latitude float64 `json:"lat"` Longitude float64 `json:"lon"` Gateways []string `json:"gateways"` SortedGateways []geoGateway `json:"sortedGateways"` } func getAPIAddr(provider string) string { switch provider { case "riseup.net": return "198.252.153.107" case "float.hexacab.org": return "198.252.153.106" case "calyx.net": return "162.247.73.194" default: return "" } } // New Bonafide: Initializes a Bonafide object. By default, no Credentials are passed. func New() *Bonafide { certs := x509.NewCertPool() certs.AppendCertsFromPEM(config.CaCert) client := &http.Client{ Transport: &http.Transport{ TLSClientConfig: &tls.Config{ RootCAs: certs, }, }, Timeout: time.Second * 30, } _, tzOffsetSeconds := time.Now().Zone() tzOffsetHours := tzOffsetSeconds / secondsPerHour b := &Bonafide{ client: client, eip: nil, tzOffsetHours: tzOffsetHours, } switch auth := config.Auth; auth { case "sip": log.Println("Client expects sip auth") b.auth = &sipAuthentication{client, b.getURL("auth")} case "anon": log.Println("Client expects anon auth") b.auth = &anonymousAuthentication{} default: log.Println("Client expects invalid auth", auth) b.auth = &anonymousAuthentication{} } return b } /* NeedsCredentials signals if we have to ask user for credentials. If false, it can be that we have a cached token */ func (b *Bonafide) NeedsCredentials() bool { if !b.auth.needsCredentials() { return false } /* try cached */ /* TODO cleanup this call - maybe expose getCachedToken instead of relying on empty creds? */ _, err := b.auth.getToken("", "") if err != nil { return true } return false } func (b *Bonafide) DoLogin(username, password string) (bool, error) { if !b.auth.needsCredentials() { return false, errors.New("Auth method does not need login") } var err error log.Println("Bonafide: getting token...") b.token, err = b.auth.getToken(username, password) if err != nil { return false, err } return true, nil } func (b *Bonafide) GetPemCertificate() ([]byte, error) { if b.auth == nil { log.Fatal("ERROR: bonafide did not initialize auth") } if b.auth.needsCredentials() { /* try cached token */ token, err := b.auth.getToken("", "") if err != nil { return nil, errors.New("bug: this service needs login, but we were not logged in") } b.token = token } req, err := http.NewRequest("POST", b.getURL("certv3"), strings.NewReader("")) if err != nil { return nil, err } if b.token != nil { req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", b.token)) } resp, err := b.client.Do(req) if err != nil { return nil, err } defer resp.Body.Close() if resp.StatusCode == 404 { resp, err = b.client.Post(b.getURL("cert"), "", nil) if err != nil { return nil, err } defer resp.Body.Close() } if resp.StatusCode != 200 { return nil, fmt.Errorf("Get vpn cert has failed with status: %s", resp.Status) } return ioutil.ReadAll(resp.Body) } func (b *Bonafide) GetPemCertificateNoDNS() ([]byte, error) { req, err := http.NewRequest("POST", b.getURLNoDNS("certv3"), strings.NewReader("")) resp, err := b.client.Do(req) if err != nil { return nil, err } defer resp.Body.Close() return ioutil.ReadAll(resp.Body) } func (b *Bonafide) getURL(object string) string { switch object { case "cert": return config.APIURL + certPathv1 case "certv3": return config.APIURL + certPathv3 case "auth": return config.APIURL + authPathv3 } log.Println("BUG: unknown url object") return "" } func (b *Bonafide) getURLNoDNS(object string) string { p := strings.ToLower(config.Provider) base := "https://" + getAPIAddr(p) + "/" switch object { case "cert": return base + certPathv1 case "certv3": return base + certPathv3 case "auth": return base + authPathv3 case "eip": return base + "3/config/eip-service.json" } log.Println("BUG: unknown url object") return "" } func (b *Bonafide) maybeInitializeEIP() error { if b.eip == nil { err := b.fetchEipJSON() if err != nil { return err } b.gateways = newGatewayPool(b.eip) } // FIXME: let's update the menshen gateways every time we 'maybe initilize EIP' // in a future we might want to be more clever on when to do that // (when opening the locations tab in the UI, only on reconnects, ...) b.fetchGatewaysFromMenshen() return nil } // GetGateways filters by transport, and will return the maximum number defined // in bonafide.maxGateways, or the maximum by default (3). func (b *Bonafide) GetGateways(transport string) ([]Gateway, error) { err := b.maybeInitializeEIP() if err != nil { return nil, err } max := maxGateways if b.maxGateways != 0 { max = b.maxGateways } gws, err := b.gateways.getBest(transport, b.tzOffsetHours, max) return gws, err } // GetAllGateways only filters gateways by transport. // if "any" is provided it will return all gateways for all transports func (b *Bonafide) GetAllGateways(transport string) ([]Gateway, error) { err := b.maybeInitializeEIP() if err != nil { return nil, err } gws, err := b.gateways.getAll(transport, b.tzOffsetHours) return gws, err } func (b *Bonafide) ListLocationFullness(transport string) map[string]float64 { return b.gateways.listLocationFullness(transport) } func (b *Bonafide) ListLocationLabels(transport string) map[string][]string { return b.gateways.listLocationLabels(transport) } func (b *Bonafide) SetManualGateway(label string) { b.gateways.setUserChoice(label) } func (b *Bonafide) SetAutomaticGateway() { b.gateways.setAutomaticChoice() } func (b *Bonafide) GetBestLocation(transport string) string { if b.gateways == nil { return "" } return b.gateways.getBestLocation(transport, b.tzOffsetHours) } func (b *Bonafide) IsManualLocation() bool { if b.gateways == nil { return false } return b.gateways.isManualLocation() } func (b *Bonafide) GetGatewayByIP(ip string) (Gateway, error) { return b.gateways.getGatewayByIP(ip) } func (b *Bonafide) fetchGatewaysFromMenshen() error { /* FIXME in float deployments, geolocation is served on gemyip.domain/json, with a LE certificate, but in riseup is served behind the api certificate. So this is a workaround until we streamline that behavior */ resp, err := b.client.Post(config.GeolocationAPI, "", nil) if err != nil { client := &http.Client{} _resp, err := client.Post(config.GeolocationAPI, "", nil) if err != nil { log.Printf("ERROR: could not fetch geolocation: %s\n", err) return err } resp = _resp } defer resp.Body.Close() if resp.StatusCode != 200 { log.Println("ERROR: bad status code while fetching geolocation:", resp.StatusCode) return fmt.Errorf("Get geolocation failed with status: %d", resp.StatusCode) } geo := &geoLocation{} dataJSON, err := ioutil.ReadAll(resp.Body) err = json.Unmarshal(dataJSON, &geo) if err != nil { log.Printf("ERROR: cannot parse geolocation json: %s\n", err) log.Println(string(dataJSON)) _ = fmt.Errorf("bad json") return err } log.Println("Got sorted gateways:", geo.Gateways) b.gateways.setRecommendedGateways(geo) return nil } func (b *Bonafide) GetOpenvpnArgs() ([]string, error) { err := b.maybeInitializeEIP() if err != nil { return nil, err } return b.eip.getOpenvpnArgs(), nil }