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authToken.go
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authToken.go
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package main
import (
"fmt"
"net/http"
"strconv"
"time"
"github.com/Cloud-Foundations/keymaster/lib/instrumentedwriter"
"github.com/Cloud-Foundations/keymaster/lib/paths"
"gopkg.in/square/go-jose.v2"
"gopkg.in/square/go-jose.v2/jwt"
)
func (state *RuntimeState) generateAuthJWT(username string) (string, error) {
signer, err := jose.NewSigner(jose.SigningKey{
Algorithm: jose.RS256,
Key: state.Signer,
}, (&jose.SignerOptions{}).WithType("JWT"))
if err != nil {
return "", err
}
issuer := state.idpGetIssuer()
now := time.Now().Unix()
authToken := authInfoJWT{
Issuer: issuer,
Subject: username,
Audience: []string{issuer},
Expiration: now + int64(
state.Config.Base.WebauthTokenForCliLifetime/time.Second),
NotBefore: now,
IssuedAt: now,
TokenType: "keymaster_webauth_for_cli_identity",
}
return jwt.Signed(signer).Claims(authToken).CompactSerialize()
}
func (state *RuntimeState) SendAuthDocumentHandler(w http.ResponseWriter,
r *http.Request) {
state.logger.Debugln(1, "Entered SendAuthDocumentHandler()")
if state.sendFailureToClientIfLocked(w, r) {
return
}
if r.Method != "GET" && r.Method != "POST" {
state.writeFailureResponse(w, r, http.StatusMethodNotAllowed, "")
return
}
if err := r.ParseForm(); err != nil {
state.logger.Println(err)
state.writeFailureResponse(w, r, http.StatusInternalServerError,
"Error parsing form")
return
}
authData, err := state.checkAuth(w, r, state.getRequiredWebUIAuthLevel())
if err != nil {
state.logger.Debugln(1, err)
return
}
w.(*instrumentedwriter.LoggingWriter).SetUsername(authData.Username)
state.logger.Printf("%s requested authentication document export\n",
authData.Username)
// Fetch form/query data.
var portNumber uint64
var token string
if val, ok := r.Form["port"]; !ok {
state.writeFailureResponse(w, r, http.StatusBadRequest,
"No CLI port number provided")
state.logger.Printf("SendAuthDocument without port number")
return
} else {
if len(val) > 1 {
state.writeFailureResponse(w, r, http.StatusBadRequest,
"Just one port number allowed")
state.logger.Printf("SendAuthDocument with multiple port values")
return
}
if portNumber, err = strconv.ParseUint(val[0], 10, 16); err != nil {
state.writeFailureResponse(w, r, http.StatusBadRequest,
"Invalid port number")
state.logger.Printf("SendAuthDocument with invalid port number")
return
}
}
if val, ok := r.Form["token"]; !ok {
state.writeFailureResponse(w, r, http.StatusBadRequest,
"No token provided")
state.logger.Printf("SendAuthDocument without token")
return
} else {
if len(val) > 1 {
state.writeFailureResponse(w, r, http.StatusBadRequest,
"Just one token allowed")
state.logger.Printf("SendAuthDocument with multiple token values")
return
}
token = val[0]
}
authInfo, err := state.getAuthInfoFromJWT(token,
"keymaster_webauth_for_cli_identity")
if err != nil {
state.writeFailureResponse(w, r, http.StatusBadRequest, "Bad token")
state.logger.Debugln(0, err)
return
}
if authInfo.Username != authData.Username {
state.writeFailureResponse(w, r, http.StatusBadRequest, "User mismatch")
state.logger.Printf(
"SendAuthDocumentHandler: authticated user: %s != token user: %s\n",
authData.Username, authInfo.Username)
return
}
if time.Until(authInfo.ExpiresAt) < 0 {
state.writeFailureResponse(w, r, http.StatusBadRequest, "Token expired")
state.logger.Debugln(0, "token expired")
return
}
// Generate a new cookie to send.
cookie, err := state.genNewSerializedAuthJWT(authInfo.Username,
AuthTypeWebauthForCLI,
int64(time.Until(authInfo.ExpiresAt)/time.Second))
http.Redirect(w, r,
fmt.Sprintf("http://localhost:%d%s?auth_cookie=%s",
portNumber, paths.ReceiveAuthDocument, cookie),
http.StatusPermanentRedirect)
}
func (state *RuntimeState) ShowAuthTokenHandler(w http.ResponseWriter,
r *http.Request) {
state.logger.Debugf(1, "Entered GetAuthTokenHandler(). URL: %v\n", r.URL)
if state.sendFailureToClientIfLocked(w, r) {
return
}
if r.Method != "GET" && r.Method != "POST" {
state.writeFailureResponse(w, r, http.StatusMethodNotAllowed, "")
return
}
if err := r.ParseForm(); err != nil {
logger.Println(err)
state.writeFailureResponse(w, r, http.StatusInternalServerError,
"Error parsing form")
return
}
authData, err := state.checkAuth(w, r, state.getRequiredWebUIAuthLevel())
if err != nil {
state.logger.Debugf(1, "%s", err)
return
}
w.(*instrumentedwriter.LoggingWriter).SetUsername(authData.Username)
displayData := authCodePageTemplateData{
Title: "Keymaster CLI Token Display",
AuthUsername: authData.Username,
SessionExpires: authData.expires(),
}
token, err := state.generateAuthJWT(authData.Username)
if err != nil {
state.logger.Println(err)
state.writeFailureResponse(w, r, http.StatusInternalServerError,
"Unable to generate token")
return
}
state.logger.Printf("generated webauth CLI token for: %s, lifetime: %s\n",
authData.Username, state.Config.Base.WebauthTokenForCliLifetime)
displayData.Token = token
err = state.htmlTemplate.ExecuteTemplate(w, "authTokenPage", displayData)
if err != nil {
logger.Printf("Failed to execute: %s\n", err)
state.writeFailureResponse(w, r, http.StatusInternalServerError,
"Error executing template")
}
}
func (state *RuntimeState) VerifyAuthTokenHandler(w http.ResponseWriter,
r *http.Request) {
state.logger.Debugf(1, "Entered VerifyAuthTokenHandler(). URL: %v\n", r.URL)
if state.sendFailureToClientIfLocked(w, r) {
return
}
if r.Method != "GET" && r.Method != "POST" {
state.writeFailureResponse(w, r, http.StatusMethodNotAllowed, "")
return
}
if err := r.ParseForm(); err != nil {
logger.Println(err)
state.writeFailureResponse(w, r, http.StatusBadRequest,
"Error parsing form")
return
}
// Fetch form/query data.
var token string
if val, ok := r.Form["token"]; !ok {
state.writeFailureResponse(w, r, http.StatusBadRequest,
"No token provided")
state.logger.Printf("VerifyAuthToken without token")
return
} else {
if len(val) > 1 {
state.writeFailureResponse(w, r, http.StatusBadRequest,
"Just one token allowed")
state.logger.Printf("VerifyAuthToken with multiple token values")
return
}
token = val[0]
}
authInfo, err := state.getAuthInfoFromJWT(token,
"keymaster_webauth_for_cli_identity")
if err != nil {
state.writeFailureResponse(w, r, http.StatusNotAcceptable, "Bad token")
state.logger.Debugln(0, err)
return
}
if time.Until(authInfo.ExpiresAt) < 0 {
state.writeFailureResponse(w, r, http.StatusGone, "Token expired")
state.logger.Debugln(0, "token expired")
return
}
w.Write([]byte("OK\n"))
}