summaryrefslogtreecommitdiff
path: root/standalone/bonafide.go
diff options
context:
space:
mode:
Diffstat (limited to 'standalone/bonafide.go')
-rw-r--r--standalone/bonafide.go231
1 files changed, 231 insertions, 0 deletions
diff --git a/standalone/bonafide.go b/standalone/bonafide.go
new file mode 100644
index 0000000..449383e
--- /dev/null
+++ b/standalone/bonafide.go
@@ -0,0 +1,231 @@
+// Copyright (C) 2018 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 <http://www.gnu.org/licenses/>.
+
+package bitmask
+
+import (
+ "crypto/tls"
+ "crypto/x509"
+ "encoding/json"
+ "fmt"
+ "io/ioutil"
+ "log"
+ "net/http"
+ "sort"
+ "strconv"
+ "strings"
+ "time"
+)
+
+const (
+ certAPI = "https://api.black.riseup.net/1/cert"
+ eipAPI = "https://api.black.riseup.net/1/config/eip-service.json"
+)
+
+var (
+ caCert = []byte(`-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`)
+)
+
+type bonafide struct {
+ client *http.Client
+ eip *eipService
+ defaultGateway string
+}
+
+type eipService struct {
+ Gateways []gateway
+ Locations map[string]struct {
+ CountryCode string
+ Hemisphere string
+ Name string
+ Timezone string
+ }
+ OpenvpnConfiguration map[string]interface{} `json:"openvpn_configuration"`
+}
+
+type gateway struct {
+ Capabilities struct {
+ Ports []string
+ Protocols []string
+ }
+ Host string
+ IPAddress string `json:"ip_address"`
+ Location string
+}
+
+func newBonafide() *bonafide {
+ certs := x509.NewCertPool()
+ certs.AppendCertsFromPEM(caCert)
+ client := &http.Client{
+ Transport: &http.Transport{
+ TLSClientConfig: &tls.Config{
+ RootCAs: certs,
+ },
+ },
+ }
+
+ return &bonafide{client, nil, ""}
+}
+
+func (b *bonafide) getCertPem() ([]byte, error) {
+ resp, err := b.client.Post(certAPI, "", 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) getGateways() ([]gateway, error) {
+ if b.eip == nil {
+ err := b.fetchEipJSON()
+ if err != nil {
+ return nil, err
+ }
+ }
+
+ return b.eip.Gateways, nil
+}
+
+func (b *bonafide) setDefaultGateway(name string) {
+ b.defaultGateway = name
+ b.sortGateways()
+}
+
+func (b *bonafide) getOpenvpnArgs() ([]string, error) {
+ if b.eip == nil {
+ err := b.fetchEipJSON()
+ if err != nil {
+ return nil, err
+ }
+ }
+
+ args := []string{}
+ for arg, value := range b.eip.OpenvpnConfiguration {
+ switch v := value.(type) {
+ case string:
+ args = append(args, "--"+arg)
+ args = append(args, strings.Split(v, " ")...)
+ case bool:
+ if v {
+ args = append(args, "--"+arg)
+ }
+ default:
+ log.Printf("Uknwon openvpn argument type: %s - %v", arg, value)
+ }
+ }
+ return args, nil
+}
+
+func (b *bonafide) fetchEipJSON() error {
+ resp, err := b.client.Post(eipAPI, "", nil)
+ if err != nil {
+ return err
+ }
+ defer resp.Body.Close()
+ if resp.StatusCode != 200 {
+ return fmt.Errorf("get vpn cert has failed with status: %s", resp.Status)
+ }
+
+ var eip eipService
+ decoder := json.NewDecoder(resp.Body)
+ err = decoder.Decode(&eip)
+ if err != nil {
+ return err
+ }
+
+ b.eip = &eip
+ b.sortGateways()
+ return nil
+}
+
+func (b *bonafide) sortGateways() {
+ type gatewayDistance struct {
+ gateway gateway
+ distance int
+ }
+
+ gws := []gatewayDistance{}
+ _, tzOffset := time.Now().Zone()
+ for _, gw := range b.eip.Gateways {
+ distance := 13
+ if gw.Location == b.defaultGateway {
+ distance = -1
+ } else {
+ gwOffset, err := strconv.Atoi(b.eip.Locations[gw.Location].Timezone)
+ if err != nil {
+ log.Printf("Error sorting gateways: %v", err)
+ } else {
+ distance = tzDistance(tzOffset, gwOffset)
+ }
+ }
+ gws = append(gws, gatewayDistance{gw, distance})
+ }
+
+ sort.Slice(gws, func(i, j int) bool { return gws[i].distance > gws[j].distance })
+ for i, gw := range gws {
+ b.eip.Gateways[i] = gw.gateway
+ }
+}
+
+func tzDistance(offset1, offset2 int) int {
+ abs := func(x int) int {
+ if x < 0 {
+ return -x
+ } else {
+ return x
+ }
+ }
+ distance := abs(offset1 - offset2)
+ if distance > 12 {
+ distance = 24 - distance
+ }
+ return distance
+}