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okta.go
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okta.go
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package okta
import (
"bytes"
"context"
"encoding/base64"
"encoding/json"
"fmt"
"html"
"io/ioutil"
"log"
"net/http"
"net/http/cookiejar"
"net/url"
"regexp"
"strconv"
"strings"
"time"
"github.com/PuerkitoBio/goquery"
"github.com/marshallbrekka/go-u2fhost"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/tidwall/gjson"
"github.com/versent/saml2aws/v2/helper/credentials"
"github.com/versent/saml2aws/v2/pkg/cfg"
"github.com/versent/saml2aws/v2/pkg/creds"
"github.com/versent/saml2aws/v2/pkg/page"
"github.com/versent/saml2aws/v2/pkg/prompter"
"github.com/versent/saml2aws/v2/pkg/provider"
"golang.org/x/net/publicsuffix"
)
const (
IdentifierDuoMfa = "DUO WEB"
IdentifierSmsMfa = "OKTA SMS"
IdentifierPushMfa = "OKTA PUSH"
IdentifierTotpMfa = "GOOGLE TOKEN:SOFTWARE:TOTP"
IdentifierOktaTotpMfa = "OKTA TOKEN:SOFTWARE:TOTP"
IdentifierSymantecTotpMfa = "SYMANTEC TOKEN"
IdentifierFIDOWebAuthn = "FIDO WEBAUTHN"
IdentifierYubiMfa = "YUBICO TOKEN:HARDWARE"
)
var logger = logrus.WithField("provider", "okta")
var (
supportedMfaOptions = map[string]string{
IdentifierDuoMfa: "DUO MFA authentication",
IdentifierSmsMfa: "SMS MFA authentication",
IdentifierPushMfa: "PUSH MFA authentication",
IdentifierTotpMfa: "TOTP MFA authentication",
IdentifierOktaTotpMfa: "Okta MFA authentication",
IdentifierSymantecTotpMfa: "Symantec VIP MFA authentication",
IdentifierFIDOWebAuthn: "FIDO WebAuthn MFA authentication",
IdentifierYubiMfa: "YUBICO TOKEN:HARDWARE",
}
)
// Client is a wrapper representing a Okta SAML client
type Client struct {
provider.ValidateBase
client *provider.HTTPClient
mfa string
targetURL string
disableSessions bool
rememberDevice bool
}
// AuthRequest represents an mfa okta request
type AuthRequest struct {
Username string `json:"username"`
Password string `json:"password"`
StateToken string `json:"stateToken,omitempty"`
}
// VerifyRequest represents an mfa verify request
type VerifyRequest struct {
StateToken string `json:"stateToken"`
PassCode string `json:"passCode,omitempty"`
RememberDevice string `json:"rememberDevice,omitempty"` // This is needed to remember Okta MFA device
}
// Articles referencing the Okta MFA + remembering device
// https://developer.okta.com/docs/reference/api/authn/#verify-security-question-factor
// https://devforum.okta.com/t/how-per-device-remember-me-api-works/3955/3
// SessionRequst holds the SessionToken used to create an Okta Session
type SessionRequst struct {
SessionToken string `json:"sessionToken"`
}
// mfaChallengeContext is used to hold MFA challenge context in a simple struct.
type mfaChallengeContext struct {
factorID string
oktaVerify string
mfaIdentifer string
challengeResponseBody string
}
// New creates a new Okta client
func New(idpAccount *cfg.IDPAccount) (*Client, error) {
tr := provider.NewDefaultTransport(idpAccount.SkipVerify)
client, err := provider.NewHTTPClient(tr, provider.BuildHttpClientOpts(idpAccount))
if err != nil {
return nil, errors.Wrap(err, "error building http client")
}
// assign a response validator to ensure all responses are either success or a redirect
// this is to avoid have explicit checks for every single response
client.CheckResponseStatus = provider.SuccessOrRedirectResponseValidator
// add cookie jar to keep track of cookies during okta login flow
jar, err := cookiejar.New(&cookiejar.Options{PublicSuffixList: publicsuffix.List})
if err != nil {
return nil, errors.Wrap(err, "error building cookie jar")
}
client.Jar = jar
disableSessions := idpAccount.DisableSessions
rememberDevice := !idpAccount.DisableRememberDevice
if idpAccount.DisableSessions { // if user disabled sessions, also dont remember device
rememberDevice = false
}
// Debug the disableSessions and rememberDevice values
logger.Debugf("okta | disableSessions: %v", disableSessions)
logger.Debugf("okta | rememberDevice: %v", rememberDevice)
return &Client{
client: client,
mfa: idpAccount.MFA,
targetURL: idpAccount.TargetURL,
disableSessions: disableSessions,
rememberDevice: rememberDevice,
}, nil
}
type ctxKey string
// createSession calls the Okta sessions API to create a new session using the sessionToken passed in
func (oc *Client) createSession(loginDetails *creds.LoginDetails, sessionToken string) (string, string, error) {
logger.Debug("create session func called")
if loginDetails == nil || sessionToken == "" {
logger.Debugf("unable to create an Okta session, nil input | loginDetails: %v | sessionToken: %s", loginDetails, sessionToken)
return "", "", fmt.Errorf("unable to create an okta session, nil input")
}
oktaURL, err := url.Parse(loginDetails.URL)
if err != nil {
return "", "", errors.Wrap(err, "error building okta url")
}
oktaOrgHost := oktaURL.Host
//authenticate via okta api
sessionReq := SessionRequst{SessionToken: sessionToken}
sessionReqBody := new(bytes.Buffer)
err = json.NewEncoder(sessionReqBody).Encode(sessionReq)
if err != nil {
return "", "", errors.Wrap(err, "error encoding session req")
}
sessionReqURL := fmt.Sprintf("https://%s/api/v1/sessions", oktaOrgHost)
req, err := http.NewRequest("POST", sessionReqURL, sessionReqBody)
if err != nil {
return "", "", errors.Wrap(err, "error building new session request")
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Accept", "application/json")
res, err := oc.client.Do(req)
if err != nil {
return "", "", errors.Wrap(err, "error retrieving session response")
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", "", errors.Wrap(err, "error retrieving body from response")
}
if res.StatusCode != 200 { // https://developer.okta.com/docs/reference/api/sessions/#response-parameters
if res.StatusCode == 401 {
return "", "", fmt.Errorf("unable to create an Okta session, invalid sessionToken")
}
return "", "", fmt.Errorf("unable to create an Okta session, HTTP Code: %d", res.StatusCode)
}
resp := string(body)
oktaSessionExpiresAtStr := gjson.Get(resp, "expiresAt").String()
logger.Debugf("okta session expires at: %s", oktaSessionExpiresAtStr)
oktaSessionCookie := gjson.Get(resp, "id").String()
err = credentials.SaveCredentials(loginDetails.URL+"/sessionCookie", loginDetails.Username, oktaSessionCookie)
if err != nil {
return "", "", fmt.Errorf("error storing okta session token | err: %v", err)
}
oktaSessionToken := gjson.Get(resp, "sessionToken").String()
sessionResponseStatus := gjson.Get(resp, "status").String()
switch sessionResponseStatus {
case "ACTIVE":
logger.Debug("okta session established")
case "MFA_REQUIRED":
oktaSessionToken, err = verifyMfa(oc, oktaOrgHost, loginDetails, resp)
if err != nil {
return "", "", errors.Wrap(err, "error verifying MFA")
}
case "MFA_ENROLL":
// Not yet fully implemented, most likely no need, so just return the status as the error string...
return "", "", fmt.Errorf("MFA_ENROLL")
}
return oktaSessionCookie, oktaSessionToken, nil
}
// validateSession calls the Okta session API to check if the session is valid
// returns an error if the session is NOT valid
func (oc *Client) validateSession(loginDetails *creds.LoginDetails) error {
logger.Debug("validate session func called")
if loginDetails == nil {
logger.Debug("unable to validate the okta session, nil input")
return fmt.Errorf("unable to validate the okta session, nil input")
}
sessionCookie := loginDetails.OktaSessionCookie
oktaURL, err := url.Parse(loginDetails.URL)
if err != nil {
return errors.Wrap(err, "error building oktaURL")
}
oktaOrgHost := oktaURL.Host
sessionReqURL := fmt.Sprintf("https://%s/api/v1/sessions/me", oktaOrgHost) // This api endpoint returns user details
sessionReqBody := new(bytes.Buffer)
req, err := http.NewRequest("GET", sessionReqURL, sessionReqBody)
if err != nil {
return errors.Wrap(err, "error building new session request")
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Accept", "application/json")
req.Header.Add("Cookie", fmt.Sprintf("sid=%s", sessionCookie))
res, err := oc.client.Do(req)
if err != nil {
return errors.Wrap(err, "error retrieving session response")
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return errors.Wrap(err, "error retrieving body from response")
}
resp := string(body)
if res.StatusCode != 200 {
logger.Debug("invalid okta session")
return fmt.Errorf("invalid okta session")
} else {
sessionResponseStatus := gjson.Get(resp, "status").String()
switch sessionResponseStatus {
case "ACTIVE":
logger.Debug("okta session established")
case "MFA_REQUIRED":
_, err := verifyMfa(oc, oktaOrgHost, loginDetails, resp)
if err != nil {
return errors.Wrap(err, "error verifying MFA")
}
case "MFA_ENROLL":
// Not yet fully implemented, so just return the status as the error string...
return fmt.Errorf("MFA_ENROLL")
}
}
logger.Debug("valid okta session")
return nil
}
// authWithSession authenticates user via sessions API -> direct to target URL using follow func
func (oc *Client) authWithSession(loginDetails *creds.LoginDetails) (string, error) {
logger.Debug("auth with session func called")
sessionCookie := loginDetails.OktaSessionCookie
err := oc.validateSession(loginDetails)
if err != nil {
modifiedLoginDetails := loginDetails
modifiedLoginDetails.OktaSessionCookie = ""
return oc.Authenticate(modifiedLoginDetails)
}
req, err := http.NewRequest("GET", loginDetails.URL, nil)
if err != nil {
return "", errors.Wrap(err, "error building authWithSession request")
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Accept", "application/json")
req.Header.Add("Cookie", fmt.Sprintf("sid=%s", sessionCookie))
ctx := context.WithValue(context.Background(), ctxKey("authWithSession"), loginDetails)
res, err := oc.client.Do(req)
if err != nil {
logger.Debugf("error authing with session: %v", err)
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
logger.Debugf("error reading body for auth with session: %v", err)
}
// This usually happens if using an active session (> 5 mins) but MFA was NOT remembered
if strings.Contains(string(body), "/login/step-up/") { // https://developer.okta.com/docs/reference/api/authn/#step-up-authentication-with-okta-session
logger.Debug("okta step-up prompted, need mfa...")
stateToken, err := getStateTokenFromOktaPageBody(string(body))
if err != nil {
return "", errors.Wrap(err, "error retrieving saml response")
}
loginDetails.StateToken = stateToken
return oc.Authenticate(loginDetails)
}
return oc.follow(ctx, req, loginDetails)
}
// getDeviceTokenFromOkta creates a dummy HTTP call to Okta and returns the device token
// cookie value
// This function is not currently used and but can be used in the future
func (oc *Client) getDeviceTokenFromOkta(loginDetails *creds.LoginDetails) (string, error) {
//dummy request to set device token cookie ("dt")
req, err := http.NewRequest("GET", loginDetails.URL, nil)
if err != nil {
return "", errors.Wrap(err, "error building device token request")
}
resp, err := oc.client.Do(req)
if err != nil {
return "", errors.Wrap(err, "error retrieving device token")
}
for _, c := range resp.Cookies() {
if c.Name == "DT" { // Device token
return c.Value, nil
}
}
return "", fmt.Errorf("unable to get a device token from okta")
}
// setDeviceTokenCookie sets the DT cookie in the HTTP Client cookie jar
// using the okta_<loginDetails.Username>_saml2aws, we reduce making an extra api call
// this func can be uplifted in the future to set custom device tokens or used with
// getDeviceTokenFromOkta function
func (oc *Client) setDeviceTokenCookie(loginDetails *creds.LoginDetails) error {
// getDeviceTokenFromOkta is not used but doing this to keep the function code
// uncommented (avoid linting issues)
if false {
dt, _ := oc.getDeviceTokenFromOkta(loginDetails)
logger.Debugf("getDeviceTokenFromOkta is not yet implemented: dt: %s", dt)
}
oktaURL, err := url.Parse(loginDetails.URL)
if err != nil {
return errors.Wrap(err, "error building oktaURL to set device token cookie")
}
oktaURLScheme := oktaURL.Scheme
oktaURLHost := oktaURL.Host
baseURL := &url.URL{Scheme: oktaURLScheme, Host: oktaURLHost, Path: "/"}
var cookies []*http.Cookie
cookie := http.Cookie{
Name: "DT",
Secure: true,
Expires: time.Now().Add(time.Hour * 24 * 30), // 30 Days -> this time might not matter as this cookie is set on every saml2aws login request
Value: fmt.Sprintf("okta_%s_saml2aws", loginDetails.Username), // Okta recommends using an UUID but this should be unique enough. Also, this is key to remembering Okta MFA device
}
cookies = append(cookies, &cookie)
oc.client.Jar.SetCookies(baseURL, cookies)
return nil
}
// primaryAuth creates the Okta Primary Authentication request
// returns the authStatus, sessionToken, http response and a error
func (oc *Client) primaryAuth(loginDetails *creds.LoginDetails) (string, string, string, error) {
oktaURL, err := url.Parse(loginDetails.URL)
if err != nil {
return "", "", "", errors.Wrap(err, "error building oktaURL")
}
oktaOrgHost := oktaURL.Host
//authenticate via okta api
authReq := AuthRequest{Username: loginDetails.Username, Password: loginDetails.Password}
if loginDetails.StateToken != "" {
authReq = AuthRequest{StateToken: loginDetails.StateToken}
}
authBody := new(bytes.Buffer)
err = json.NewEncoder(authBody).Encode(authReq)
if err != nil {
return "", "", "", errors.Wrap(err, "error encoding authreq")
}
authSubmitURL := fmt.Sprintf("https://%s/api/v1/authn", oktaOrgHost)
req, err := http.NewRequest("POST", authSubmitURL, authBody)
if err != nil {
return "", "", "", errors.Wrap(err, "error building authentication request")
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Accept", "application/json")
res, err := oc.client.Do(req)
if err != nil {
return "", "", "", errors.Wrap(err, "error retrieving auth response")
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", "", "", errors.Wrap(err, "error retrieving body from response")
}
resp := string(body)
authStatus := gjson.Get(resp, "status").String()
oktaSessionToken := gjson.Get(resp, "sessionToken").String()
return authStatus, oktaSessionToken, resp, nil
}
// Authenticate logs into Okta and returns a SAML response
func (oc *Client) Authenticate(loginDetails *creds.LoginDetails) (string, error) {
// Set Okta device token
err := oc.setDeviceTokenCookie(loginDetails)
if err != nil {
return "", errors.Wrap(err, "error setting device token in cookie jar")
}
// Get Okta session cookie (sid) from login details (if found via login.go)
oktaSessionCookie := loginDetails.OktaSessionCookie
// If user disabled sessions, do not use sessions API
if !oc.disableSessions {
// If Okta session cookie is not empty
// Note on checking StateToken: StateToken is set in the follow func
// if the follow func calls this function (Authenticate), it means the session requires MFA to continue
// so don't call authWithSession, instead flow through to create the primary authentication call
if oktaSessionCookie != "" && loginDetails.StateToken == "" {
return oc.authWithSession(loginDetails)
}
}
oktaURL, err := url.Parse(loginDetails.URL)
if err != nil {
return "", errors.Wrap(err, "error building oktaURL")
}
oktaOrgHost := oktaURL.Host
authStatus, oktaSessionToken, primaryAuthResp, err := oc.primaryAuth(loginDetails)
if err != nil {
return "", err
}
switch authStatus {
case "MFA_REQUIRED":
oktaSessionToken, err = verifyMfa(oc, oktaOrgHost, loginDetails, primaryAuthResp)
if err != nil {
return "", errors.Wrap(err, "error verifying MFA")
}
case "LOCKED_OUT":
return "", errors.New("the account is locked")
}
// if user disabled sessions, default to using standard login WITHOUT sessions
if oc.disableSessions {
//now call saml endpoint
oktaSessionRedirectURL := fmt.Sprintf("https://%s/login/sessionCookieRedirect", oktaOrgHost)
req, err := http.NewRequest("GET", oktaSessionRedirectURL, nil)
if err != nil {
return "", errors.Wrap(err, "error building authentication request")
}
q := req.URL.Query()
q.Add("checkAccountSetupComplete", "true")
q.Add("token", oktaSessionToken)
q.Add("redirectUrl", loginDetails.URL)
req.URL.RawQuery = q.Encode()
ctx := context.WithValue(context.Background(), ctxKey("login"), loginDetails)
return oc.follow(ctx, req, loginDetails)
}
// Only reaches here if user DID NOT DISABLE okta sessions
if oktaSessionCookie == "" {
oktaSessionCookie, _, err = oc.createSession(loginDetails, oktaSessionToken)
if err != nil {
return "", err
}
loginDetails.OktaSessionCookie = oktaSessionCookie
}
return oc.authWithSession(loginDetails)
}
func (oc *Client) follow(ctx context.Context, req *http.Request, loginDetails *creds.LoginDetails) (string, error) {
if ctx.Value(ctxKey("follow")) != nil {
logger.Debug("follow func called from itself")
}
if ctx.Value(ctxKey("authWithSession")) != nil {
logger.Debug("follow func called from auth with session func")
}
res, err := oc.client.Do(req)
if err != nil {
logger.Debug("ERROR FOLLOWING")
return "", errors.Wrap(err, "error following")
}
doc, err := goquery.NewDocumentFromReader(res.Body)
if err != nil {
logger.Debug("FAILED TO BUILD DOC FROM RESP")
return "", errors.Wrap(err, "failed to build document from response")
}
var handler func(context.Context, *goquery.Document) (context.Context, *http.Request, error)
if docIsFormRedirectToTarget(doc, oc.targetURL) {
logger.WithField("type", "saml-response-to-aws").Debug("doc detect")
if samlResponse, ok := extractSAMLResponse(doc); ok {
decodedSamlResponse, err := base64.StdEncoding.DecodeString(samlResponse)
if err != nil {
return "", errors.Wrap(err, "failed to decode saml-response")
}
logger.WithField("type", "saml-response").WithField("saml-response", string(decodedSamlResponse)).Debug("doc detect")
return samlResponse, nil
}
} else if docIsFormSamlRequest(doc) {
logger.WithField("type", "saml-request").Debug("doc detect")
handler = oc.handleFormRedirect
} else if docIsFormResume(doc) {
logger.WithField("type", "resume").Debug("doc detect")
handler = oc.handleFormRedirect
} else if docIsFormSamlResponse(doc) {
logger.WithField("type", "saml-response").Debug("doc detect")
handler = oc.handleFormRedirect
} else {
req, err = http.NewRequest("GET", loginDetails.URL, nil)
if err != nil {
return "", errors.Wrap(err, "error building app request")
}
res, err = oc.client.Do(req)
if err != nil {
return "", errors.Wrap(err, "error retrieving app response")
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", errors.Wrap(err, "error retrieving body from response")
}
stateToken, err := getStateTokenFromOktaPageBody(string(body))
if err != nil {
return "", errors.Wrap(err, "error retrieving saml response")
}
loginDetails.StateToken = stateToken
return oc.Authenticate(loginDetails)
}
if handler == nil {
html, _ := doc.Selection.Html()
logger.WithField("doc", html).Debug("Unknown document type")
return "", fmt.Errorf("Unknown document type")
}
ctx, req, err = handler(ctx, doc)
if err != nil {
return "", err
}
return oc.follow(ctx, req, loginDetails)
}
func getStateTokenFromOktaPageBody(responseBody string) (string, error) {
re := regexp.MustCompile("var stateToken = [\"|'](.*)[\"|'];")
match := re.FindStringSubmatch(responseBody)
if len(match) < 2 {
return "", errors.New("cannot find state token")
}
return strings.Replace(match[1], `\x2D`, "-", -1), nil
}
func parseMfaIdentifer(json string, arrayPosition int) string {
mfaProvider := gjson.Get(json, fmt.Sprintf("_embedded.factors.%d.provider", arrayPosition)).String()
factorType := strings.ToUpper(gjson.Get(json, fmt.Sprintf("_embedded.factors.%d.factorType", arrayPosition)).String())
return fmt.Sprintf("%s %s", mfaProvider, factorType)
}
func (oc *Client) handleFormRedirect(ctx context.Context, doc *goquery.Document) (context.Context, *http.Request, error) {
form, err := page.NewFormFromDocument(doc, "")
if err != nil {
return ctx, nil, errors.Wrap(err, "error extracting redirect form")
}
req, err := form.BuildRequest()
return ctx, req, err
}
func docIsFormSamlRequest(doc *goquery.Document) bool {
return doc.Find("input[name=\"SAMLRequest\"]").Size() == 1
}
func docIsFormSamlResponse(doc *goquery.Document) bool {
return doc.Find("input[name=\"SAMLResponse\"]").Size() == 1
}
func docIsFormResume(doc *goquery.Document) bool {
return doc.Find("input[name=\"RelayState\"]").Size() == 1
}
func docIsFormRedirectToTarget(doc *goquery.Document, target string) bool {
var urls []string
if target != "" {
url := fmt.Sprintf("form[action=\"%s\"]", target)
urls = []string{url}
} else {
urls = []string{"form[action=\"https://signin.aws.amazon.com/saml\"]",
"form[action=\"https://signin.amazonaws-us-gov.com/saml\"]",
"form[action=\"https://signin.amazonaws.cn/saml\"]",
}
}
for _, value := range urls {
if doc.Find(value).Size() > 0 {
return true
}
}
return false
}
func extractSAMLResponse(doc *goquery.Document) (v string, ok bool) {
return doc.Find("input[name=\"SAMLResponse\"]").Attr("value")
}
func findMfaOption(mfa string, mfaOptions []string, startAtIdx int) int {
for idx, val := range mfaOptions {
if startAtIdx > idx {
continue
}
if strings.HasPrefix(strings.ToUpper(val), mfa) {
return idx
}
}
return 0
}
func getMfaChallengeContext(oc *Client, mfaOption int, resp string) (*mfaChallengeContext, error) {
stateToken := gjson.Get(resp, "stateToken").String()
factorID := gjson.Get(resp, fmt.Sprintf("_embedded.factors.%d.id", mfaOption)).String()
oktaVerify := gjson.Get(resp, fmt.Sprintf("_embedded.factors.%d._links.verify.href", mfaOption)).String()
mfaIdentifer := parseMfaIdentifer(resp, mfaOption)
logger.WithField("factorID", factorID).WithField("oktaVerify", oktaVerify).WithField("mfaIdentifer", mfaIdentifer).Debug("MFA")
if _, ok := supportedMfaOptions[mfaIdentifer]; !ok {
return nil, errors.New("unsupported mfa provider")
}
// get signature & callback
verifyReq := VerifyRequest{StateToken: stateToken, RememberDevice: strconv.FormatBool(oc.rememberDevice)}
verifyBody := new(bytes.Buffer)
// Login flow is different for YubiKeys ( of course )
// https://developer.okta.com/docs/reference/api/factors/#request-example-for-verify-yubikey-factor
// verifyBody needs to be a json document with the OTP from the yubikey in it.
// yay
switch mfa := mfaIdentifer; mfa {
case IdentifierYubiMfa:
verifyCode := prompter.Password("Press the button on your yubikey")
verifyReq.PassCode = verifyCode
}
err := json.NewEncoder(verifyBody).Encode(verifyReq)
if err != nil {
return nil, errors.Wrap(err, "error encoding verifyReq")
}
req, err := http.NewRequest("POST", oktaVerify, verifyBody)
if err != nil {
return nil, errors.Wrap(err, "error building verify request")
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Accept", "application/json")
res, err := oc.client.Do(req)
if err != nil {
return nil, errors.Wrap(err, "error retrieving verify response")
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return nil, errors.Wrap(err, "error retrieving body from response")
}
return &mfaChallengeContext{
factorID: factorID,
oktaVerify: oktaVerify,
mfaIdentifer: mfaIdentifer,
challengeResponseBody: string(body),
}, nil
}
func verifyMfa(oc *Client, oktaOrgHost string, loginDetails *creds.LoginDetails, resp string) (string, error) {
stateToken := gjson.Get(resp, "stateToken").String()
// choose an mfa option if there are multiple enabled
mfaOption := 0
var mfaOptions []string
for i := range gjson.Get(resp, "_embedded.factors").Array() {
identifier := parseMfaIdentifer(resp, i)
if val, ok := supportedMfaOptions[identifier]; ok {
mfaOptions = append(mfaOptions, val)
} else {
mfaOptions = append(mfaOptions, "UNSUPPORTED: "+identifier)
}
}
if strings.ToUpper(oc.mfa) != "AUTO" {
mfaOption = findMfaOption(oc.mfa, mfaOptions, 0)
} else if len(mfaOptions) > 1 {
mfaOption = prompter.Choose("Select which MFA option to use", mfaOptions)
}
challengeContext, err := getMfaChallengeContext(oc, mfaOption, resp)
if err != nil {
return "", err
}
switch mfa := challengeContext.mfaIdentifer; mfa {
case IdentifierYubiMfa:
return gjson.Get(challengeContext.challengeResponseBody, "sessionToken").String(), nil
case IdentifierSmsMfa, IdentifierTotpMfa, IdentifierOktaTotpMfa, IdentifierSymantecTotpMfa:
var verifyCode = loginDetails.MFAToken
if verifyCode == "" {
verifyCode = prompter.StringRequired("Enter verification code")
}
tokenReq := VerifyRequest{StateToken: stateToken, PassCode: verifyCode, RememberDevice: strconv.FormatBool(oc.rememberDevice)}
tokenBody := new(bytes.Buffer)
err = json.NewEncoder(tokenBody).Encode(tokenReq)
if err != nil {
return "", errors.Wrap(err, "error encoding token data")
}
req, err := http.NewRequest("POST", challengeContext.oktaVerify, tokenBody)
if err != nil {
return "", errors.Wrap(err, "error building token post request")
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Accept", "application/json")
res, err := oc.client.Do(req)
if err != nil {
return "", errors.Wrap(err, "error retrieving token post response")
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", errors.Wrap(err, "error retrieving body from response")
}
resp = string(body)
return gjson.Get(resp, "sessionToken").String(), nil
case IdentifierPushMfa:
log.Println("Waiting for approval, please check your Okta Verify app ...")
// loop until success, error, or timeout
body := challengeContext.challengeResponseBody
for {
// on 'success' status
if gjson.Get(body, "status").String() == "SUCCESS" {
log.Println(" Approved")
logger.Debugf("func verifyMfa | okta exiry: %s", gjson.Get(body, "expiresAt").String()) // DEBUG
return gjson.Get(body, "sessionToken").String(), nil
}
// otherwise probably still waiting
switch gjson.Get(body, "factorResult").String() {
case "WAITING":
time.Sleep(3 * time.Second)
logger.Debug("Waiting for user to authorize login")
updatedContext, err := getMfaChallengeContext(oc, mfaOption, resp)
if err != nil {
return "", err
}
body = updatedContext.challengeResponseBody
case "TIMEOUT":
log.Println(" Timeout")
return "", errors.New("User did not accept MFA in time")
case "REJECTED":
log.Println(" Rejected")
return "", errors.New("MFA rejected by user")
default:
log.Println(" Error")
return "", errors.New("Unsupported response from Okta, please raise ticket with saml2aws")
}
}
case IdentifierDuoMfa:
duoHost := gjson.Get(challengeContext.challengeResponseBody, "_embedded.factor._embedded.verification.host").String()
duoSignature := gjson.Get(challengeContext.challengeResponseBody, "_embedded.factor._embedded.verification.signature").String()
duoSiguatres := strings.Split(duoSignature, ":")
//duoSignatures[0] = TX
//duoSignatures[1] = APP
duoCallback := gjson.Get(challengeContext.challengeResponseBody, "_embedded.factor._embedded.verification._links.complete.href").String()
// initiate duo mfa to get sid
duoSubmitURL := fmt.Sprintf("https://%s/frame/web/v1/auth", duoHost)
duoForm := url.Values{}
duoForm.Add("parent", fmt.Sprintf("https://%s/signin/verify/duo/web", oktaOrgHost))
duoForm.Add("java_version", "")
duoForm.Add("java_version", "")
duoForm.Add("flash_version", "")
duoForm.Add("screen_resolution_width", "3008")
duoForm.Add("screen_resolution_height", "1692")
duoForm.Add("color_depth", "24")
req, err := http.NewRequest("POST", duoSubmitURL, strings.NewReader(duoForm.Encode()))
if err != nil {
return "", errors.Wrap(err, "error building authentication request")
}
q := req.URL.Query()
q.Add("tx", duoSiguatres[0])
req.URL.RawQuery = q.Encode()
req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
res, err := oc.client.Do(req)
if err != nil {
return "", errors.Wrap(err, "error retrieving verify response")
}
//try to extract sid
doc, err := goquery.NewDocumentFromReader(res.Body)
if err != nil {
return "", errors.Wrap(err, "error parsing document")
}
duoSID, ok := doc.Find("input[name=\"sid\"]").Attr("value")
if !ok {
return "", errors.Wrap(err, "unable to locate saml response")
}
duoSID = html.UnescapeString(duoSID)
//prompt for mfa type
//only supporting push or passcode for now
var token string
var duoMfaOptions = []string{
"Duo Push",
"Passcode",
}
duoMfaOption := 0
if loginDetails.DuoMFAOption == "Duo Push" {
duoMfaOption = 0
} else if loginDetails.DuoMFAOption == "Passcode" {
duoMfaOption = 1
} else {
duoMfaOption = prompter.Choose("Select a DUO MFA Option", duoMfaOptions)
}
if duoMfaOptions[duoMfaOption] == "Passcode" {
//get users DUO MFA Token
token = prompter.StringRequired("Enter passcode")
}
// send mfa auth request
duoSubmitURL = fmt.Sprintf("https://%s/frame/prompt", duoHost)
duoForm = url.Values{}
duoForm.Add("sid", duoSID)
duoForm.Add("device", "phone1")
duoForm.Add("factor", duoMfaOptions[duoMfaOption])
duoForm.Add("out_of_date", "false")
if duoMfaOptions[duoMfaOption] == "Passcode" {
duoForm.Add("passcode", token)
}
req, err = http.NewRequest("POST", duoSubmitURL, strings.NewReader(duoForm.Encode()))
if err != nil {
return "", errors.Wrap(err, "error building authentication request")
}
req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
res, err = oc.client.Do(req)
if err != nil {
return "", errors.Wrap(err, "error retrieving verify response")
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", errors.Wrap(err, "error retrieving body from response")
}
resp = string(body)
duoTxStat := gjson.Get(resp, "stat").String()
duoTxID := gjson.Get(resp, "response.txid").String()
if duoTxStat != "OK" {
return "", errors.New("error authenticating mfa device")
}
// get duo cookie
duoSubmitURL = fmt.Sprintf("https://%s/frame/status", duoHost)
duoForm = url.Values{}
duoForm.Add("sid", duoSID)
duoForm.Add("txid", duoTxID)
req, err = http.NewRequest("POST", duoSubmitURL, strings.NewReader(duoForm.Encode()))
if err != nil {
return "", errors.Wrap(err, "error building authentication request")
}
req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
res, err = oc.client.Do(req)
if err != nil {
return "", errors.Wrap(err, "error retrieving verify response")
}
body, err = ioutil.ReadAll(res.Body)
if err != nil {
return "", errors.Wrap(err, "error retrieving body from response")
}
resp = string(body)
duoTxResult := gjson.Get(resp, "response.result").String()
duoResultURL := gjson.Get(resp, "response.result_url").String()
newSID := gjson.Get(resp, "response.sid").String()
if newSID != "" {
duoSID = newSID
}
log.Println(gjson.Get(resp, "response.status").String())
if duoTxResult != "SUCCESS" {
//poll as this is likely a push request
for {
time.Sleep(3 * time.Second)
req, err = http.NewRequest("POST", duoSubmitURL, strings.NewReader(duoForm.Encode()))
if err != nil {
return "", errors.Wrap(err, "error building authentication request")
}
req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
res, err = oc.client.Do(req)
if err != nil {
return "", errors.Wrap(err, "error retrieving verify response")
}
body, err = ioutil.ReadAll(res.Body)
if err != nil {
return "", errors.Wrap(err, "error retrieving body from response")
}
resp := string(body)
duoTxResult = gjson.Get(resp, "response.result").String()
duoResultURL = gjson.Get(resp, "response.result_url").String()
newSID = gjson.Get(resp, "response.sid").String()
if newSID != "" {
duoSID = newSID
}