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// Copyright 2017 Vector Creations Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package threepid
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/http"
"net/url"
"strconv"
"strings"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/gomatrixserverlib/spec"
)
// EmailAssociationRequest represents the request defined at https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-client-r0-register-email-requesttoken
type EmailAssociationRequest struct {
IDServer string `json:"id_server"`
Secret string `json:"client_secret"`
Email string `json:"email"`
SendAttempt int `json:"send_attempt"`
}
// EmailAssociationCheckRequest represents the request defined at https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-client-r0-account-3pid
type EmailAssociationCheckRequest struct {
Creds Credentials `json:"three_pid_creds"`
Bind bool `json:"bind"`
}
// Credentials represents the "ThreePidCredentials" structure defined at https://matrix.org/docs/spec/client_server/r0.2.0.html#post-matrix-client-r0-account-3pid
type Credentials struct {
SID string `json:"sid"`
IDServer string `json:"id_server"`
Secret string `json:"client_secret"`
}
type SID struct {
SID string `json:"sid"`
}
// CreateSession creates a session on an identity server.
// Returns the session's ID.
// Returns an error if there was a problem sending the request or decoding the
// response, or if the identity server responded with a non-OK status.
func CreateSession(
ctx context.Context, req EmailAssociationRequest, cfg *config.ClientAPI, client *fclient.Client,
) (string, error) {
if err := isTrusted(req.IDServer, cfg); err != nil {
return "", err
}
// Create a session on the ID server
postURL := fmt.Sprintf("https://%s/_matrix/identity/api/v1/validate/email/requestToken", req.IDServer)
data := url.Values{}
data.Add("client_secret", req.Secret)
data.Add("email", req.Email)
data.Add("send_attempt", strconv.Itoa(req.SendAttempt))
request, err := http.NewRequest(http.MethodPost, postURL, strings.NewReader(data.Encode()))
if err != nil {
return "", err
}
request.Header.Add("Content-Type", "application/x-www-form-urlencoded")
resp, err := client.DoHTTPRequest(ctx, request)
if err != nil {
return "", err
}
defer resp.Body.Close()
// Error if the status isn't OK
if resp.StatusCode != http.StatusOK {
return "", fmt.Errorf("could not create a session on the server %s", req.IDServer)
}
// Extract the SID from the response and return it
var sid SID
err = json.NewDecoder(resp.Body).Decode(&sid)
return sid.SID, err
}
type GetValidatedResponse struct {
Medium string `json:"medium"`
ValidatedAt int64 `json:"validated_at"`
Address string `json:"address"`
ErrCode string `json:"errcode"`
Error string `json:"error"`
}
// CheckAssociation checks the status of an ongoing association validation on an
// identity server.
// Returns a boolean set to true if the association has been validated, false if not.
// If the association has been validated, also returns the related third-party
// identifier and its medium.
// Returns an error if there was a problem sending the request or decoding the
// response, or if the identity server responded with a non-OK status.
func CheckAssociation(
ctx context.Context, creds Credentials, cfg *config.ClientAPI,
client *fclient.Client,
) (bool, string, string, error) {
if err := isTrusted(creds.IDServer, cfg); err != nil {
return false, "", "", err
}
requestURL := fmt.Sprintf("https://%s/_matrix/identity/api/v1/3pid/getValidated3pid?sid=%s&client_secret=%s", creds.IDServer, creds.SID, creds.Secret)
req, err := http.NewRequest(http.MethodGet, requestURL, nil)
if err != nil {
return false, "", "", err
}
resp, err := client.DoHTTPRequest(ctx, req)
if err != nil {
return false, "", "", err
}
var respBody GetValidatedResponse
if err = json.NewDecoder(resp.Body).Decode(&respBody); err != nil {
return false, "", "", err
}
if respBody.ErrCode == string(spec.ErrorSessionNotValidated) {
return false, "", "", nil
} else if len(respBody.ErrCode) > 0 {
return false, "", "", errors.New(respBody.Error)
}
return true, respBody.Address, respBody.Medium, nil
}
// PublishAssociation publishes a validated association between a third-party
// identifier and a Matrix ID.
// Returns an error if there was a problem sending the request or decoding the
// response, or if the identity server responded with a non-OK status.
func PublishAssociation(ctx context.Context, creds Credentials, userID string, cfg *config.ClientAPI, client *fclient.Client) error {
if err := isTrusted(creds.IDServer, cfg); err != nil {
return err
}
postURL := fmt.Sprintf("https://%s/_matrix/identity/api/v1/3pid/bind", creds.IDServer)
data := url.Values{}
data.Add("sid", creds.SID)
data.Add("client_secret", creds.Secret)
data.Add("mxid", userID)
request, err := http.NewRequest(http.MethodPost, postURL, strings.NewReader(data.Encode()))
if err != nil {
return err
}
request.Header.Add("Content-Type", "application/x-www-form-urlencoded")
resp, err := client.DoHTTPRequest(ctx, request)
if err != nil {
return err
}
// Error if the status isn't OK
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("could not publish the association on the server %s", creds.IDServer)
}
return nil
}
// isTrusted checks if a given identity server is part of the list of trusted
// identity servers in the configuration file.
// Returns an error if the server isn't trusted.
func isTrusted(idServer string, cfg *config.ClientAPI) error {
for _, server := range cfg.Matrix.TrustedIDServers {
if idServer == server {
return nil
}
}
return ErrNotTrusted{}
}
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