mirror of
https://github.com/drakkan/sftpgo.git
synced 2024-06-03 00:42:12 +02:00
323 lines
10 KiB
Go
323 lines
10 KiB
Go
// Copyright (C) 2019 Nicola Murino
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published
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// by the Free Software Foundation, version 3.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package httpd
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"strings"
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"github.com/go-chi/render"
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"github.com/drakkan/sftpgo/v2/internal/dataprovider"
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"github.com/drakkan/sftpgo/v2/internal/kms"
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"github.com/drakkan/sftpgo/v2/internal/mfa"
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"github.com/drakkan/sftpgo/v2/internal/util"
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)
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var (
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errRecoveryCodeForbidden = errors.New("recovery codes are not available with two-factor authentication disabled")
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)
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type generateTOTPRequest struct {
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ConfigName string `json:"config_name"`
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}
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type generateTOTPResponse struct {
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ConfigName string `json:"config_name"`
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Issuer string `json:"issuer"`
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Secret string `json:"secret"`
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URL string `json:"url"`
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QRCode []byte `json:"qr_code"`
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}
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type validateTOTPRequest struct {
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ConfigName string `json:"config_name"`
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Passcode string `json:"passcode"`
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Secret string `json:"secret"`
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}
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type recoveryCode struct {
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Code string `json:"code"`
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Used bool `json:"used"`
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}
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func getTOTPConfigs(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
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render.JSON(w, r, mfa.GetAvailableTOTPConfigs())
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}
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func generateTOTPSecret(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
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claims, err := getTokenClaims(r)
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if err != nil || claims.Username == "" {
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sendAPIResponse(w, r, err, "Invalid token claims", http.StatusBadRequest)
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return
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}
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var accountName string
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if claims.hasUserAudience() {
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accountName = fmt.Sprintf("User %q", claims.Username)
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} else {
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accountName = fmt.Sprintf("Admin %q", claims.Username)
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}
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var req generateTOTPRequest
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err = render.DecodeJSON(r.Body, &req)
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if err != nil {
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sendAPIResponse(w, r, err, "", http.StatusBadRequest)
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return
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}
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configName, key, qrCode, err := mfa.GenerateTOTPSecret(req.ConfigName, accountName)
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if err != nil {
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sendAPIResponse(w, r, err, "", http.StatusBadRequest)
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return
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}
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render.JSON(w, r, generateTOTPResponse{
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ConfigName: configName,
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Issuer: key.Issuer(),
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Secret: key.Secret(),
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URL: key.URL(),
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QRCode: qrCode,
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})
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}
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func getQRCode(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
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img, err := mfa.GenerateQRCodeFromURL(r.URL.Query().Get("url"), 400, 400)
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if err != nil {
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sendAPIResponse(w, r, nil, "unable to generate qr code", http.StatusInternalServerError)
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return
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}
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imgSize := int64(len(img))
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w.Header().Set("Content-Length", strconv.FormatInt(imgSize, 10))
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w.Header().Set("Content-Type", "image/png")
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io.CopyN(w, bytes.NewBuffer(img), imgSize) //nolint:errcheck
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}
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func saveTOTPConfig(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
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claims, err := getTokenClaims(r)
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if err != nil || claims.Username == "" {
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sendAPIResponse(w, r, err, "Invalid token claims", http.StatusBadRequest)
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return
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}
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recoveryCodes := make([]dataprovider.RecoveryCode, 0, 12)
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for i := 0; i < 12; i++ {
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code := getNewRecoveryCode()
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recoveryCodes = append(recoveryCodes, dataprovider.RecoveryCode{Secret: kms.NewPlainSecret(code)})
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}
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baseURL := webBaseClientPath
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if claims.hasUserAudience() {
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if err := saveUserTOTPConfig(claims.Username, r, recoveryCodes); err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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} else {
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if err := saveAdminTOTPConfig(claims.Username, r, recoveryCodes); err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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baseURL = webBasePath
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}
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if claims.MustSetTwoFactorAuth {
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// force logout
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defer func() {
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c := jwtTokenClaims{}
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c.removeCookie(w, r, baseURL)
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}()
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}
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sendAPIResponse(w, r, nil, "TOTP configuration saved", http.StatusOK)
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}
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func validateTOTPPasscode(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
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var req validateTOTPRequest
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err := render.DecodeJSON(r.Body, &req)
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if err != nil {
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sendAPIResponse(w, r, err, "", http.StatusBadRequest)
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return
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}
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match, err := mfa.ValidateTOTPPasscode(req.ConfigName, req.Passcode, req.Secret)
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if !match || err != nil {
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sendAPIResponse(w, r, err, "Invalid passcode", http.StatusBadRequest)
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return
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}
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sendAPIResponse(w, r, nil, "Passcode successfully validated", http.StatusOK)
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}
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func getRecoveryCodes(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
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claims, err := getTokenClaims(r)
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if err != nil || claims.Username == "" {
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sendAPIResponse(w, r, err, "Invalid token claims", http.StatusBadRequest)
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return
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}
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recoveryCodes := make([]recoveryCode, 0, 12)
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var accountRecoveryCodes []dataprovider.RecoveryCode
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if claims.hasUserAudience() {
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user, err := dataprovider.UserExists(claims.Username, "")
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if err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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if !user.Filters.TOTPConfig.Enabled {
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sendAPIResponse(w, r, errRecoveryCodeForbidden, "", http.StatusForbidden)
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return
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}
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accountRecoveryCodes = user.Filters.RecoveryCodes
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} else {
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admin, err := dataprovider.AdminExists(claims.Username)
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if err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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if !admin.Filters.TOTPConfig.Enabled {
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sendAPIResponse(w, r, errRecoveryCodeForbidden, "", http.StatusForbidden)
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return
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}
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accountRecoveryCodes = admin.Filters.RecoveryCodes
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}
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for _, code := range accountRecoveryCodes {
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if err := code.Secret.Decrypt(); err != nil {
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sendAPIResponse(w, r, err, "Unable to decrypt recovery codes", getRespStatus(err))
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return
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}
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recoveryCodes = append(recoveryCodes, recoveryCode{
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Code: code.Secret.GetPayload(),
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Used: code.Used,
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})
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}
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render.JSON(w, r, recoveryCodes)
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}
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func generateRecoveryCodes(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
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claims, err := getTokenClaims(r)
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if err != nil || claims.Username == "" {
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sendAPIResponse(w, r, err, "Invalid token claims", http.StatusBadRequest)
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return
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}
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recoveryCodes := make([]string, 0, 12)
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accountRecoveryCodes := make([]dataprovider.RecoveryCode, 0, 12)
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for i := 0; i < 12; i++ {
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code := getNewRecoveryCode()
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recoveryCodes = append(recoveryCodes, code)
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accountRecoveryCodes = append(accountRecoveryCodes, dataprovider.RecoveryCode{Secret: kms.NewPlainSecret(code)})
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}
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if claims.hasUserAudience() {
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user, err := dataprovider.UserExists(claims.Username, "")
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if err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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if !user.Filters.TOTPConfig.Enabled {
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sendAPIResponse(w, r, errRecoveryCodeForbidden, "", http.StatusForbidden)
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return
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}
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user.Filters.RecoveryCodes = accountRecoveryCodes
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if err := dataprovider.UpdateUser(&user, dataprovider.ActionExecutorSelf, util.GetIPFromRemoteAddress(r.RemoteAddr), user.Role); err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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} else {
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admin, err := dataprovider.AdminExists(claims.Username)
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if err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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if !admin.Filters.TOTPConfig.Enabled {
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sendAPIResponse(w, r, errRecoveryCodeForbidden, "", http.StatusForbidden)
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return
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}
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admin.Filters.RecoveryCodes = accountRecoveryCodes
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if err := dataprovider.UpdateAdmin(&admin, dataprovider.ActionExecutorSelf, util.GetIPFromRemoteAddress(r.RemoteAddr), admin.Role); err != nil {
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sendAPIResponse(w, r, err, "", getRespStatus(err))
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return
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}
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}
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render.JSON(w, r, recoveryCodes)
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}
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func getNewRecoveryCode() string {
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return fmt.Sprintf("RC-%v", strings.ToUpper(util.GenerateUniqueID()))
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}
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func saveUserTOTPConfig(username string, r *http.Request, recoveryCodes []dataprovider.RecoveryCode) error {
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user, userMerged, err := dataprovider.GetUserVariants(username, "")
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if err != nil {
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return err
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}
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currentTOTPSecret := user.Filters.TOTPConfig.Secret
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user.Filters.TOTPConfig.Secret = nil
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err = render.DecodeJSON(r.Body, &user.Filters.TOTPConfig)
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if err != nil {
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return util.NewValidationError(fmt.Sprintf("unable to decode JSON body: %v", err))
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}
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if !user.Filters.TOTPConfig.Enabled && len(userMerged.Filters.TwoFactorAuthProtocols) > 0 {
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return util.NewValidationError("two-factor authentication must be enabled")
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}
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for _, p := range userMerged.Filters.TwoFactorAuthProtocols {
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if !util.Contains(user.Filters.TOTPConfig.Protocols, p) {
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return util.NewValidationError(fmt.Sprintf("totp: the following protocols are required: %q",
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strings.Join(userMerged.Filters.TwoFactorAuthProtocols, ", ")))
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}
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}
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if user.Filters.TOTPConfig.Secret == nil || !user.Filters.TOTPConfig.Secret.IsPlain() {
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user.Filters.TOTPConfig.Secret = currentTOTPSecret
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}
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if user.Filters.TOTPConfig.Enabled {
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if user.CountUnusedRecoveryCodes() < 5 && user.Filters.TOTPConfig.Enabled {
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user.Filters.RecoveryCodes = recoveryCodes
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}
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} else {
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user.Filters.RecoveryCodes = nil
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}
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return dataprovider.UpdateUser(&user, dataprovider.ActionExecutorSelf, util.GetIPFromRemoteAddress(r.RemoteAddr), user.Role)
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}
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func saveAdminTOTPConfig(username string, r *http.Request, recoveryCodes []dataprovider.RecoveryCode) error {
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admin, err := dataprovider.AdminExists(username)
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if err != nil {
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return err
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}
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currentTOTPSecret := admin.Filters.TOTPConfig.Secret
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admin.Filters.TOTPConfig.Secret = nil
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err = render.DecodeJSON(r.Body, &admin.Filters.TOTPConfig)
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if err != nil {
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return util.NewValidationError(fmt.Sprintf("unable to decode JSON body: %v", err))
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}
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if !admin.Filters.TOTPConfig.Enabled && admin.Filters.RequireTwoFactor {
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return util.NewValidationError("two-factor authentication must be enabled")
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}
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if admin.Filters.TOTPConfig.Enabled {
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if admin.CountUnusedRecoveryCodes() < 5 && admin.Filters.TOTPConfig.Enabled {
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admin.Filters.RecoveryCodes = recoveryCodes
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}
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} else {
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admin.Filters.RecoveryCodes = nil
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}
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if admin.Filters.TOTPConfig.Secret == nil || !admin.Filters.TOTPConfig.Secret.IsPlain() {
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admin.Filters.TOTPConfig.Secret = currentTOTPSecret
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}
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return dataprovider.UpdateAdmin(&admin, dataprovider.ActionExecutorSelf, util.GetIPFromRemoteAddress(r.RemoteAddr), admin.Role)
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}
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