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factors.go
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factors.go
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package okta
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"strings"
"time"
)
type Factor struct {
ID string `json:"id"`
FactorType string `json:"factorType"`
Provider string `json:"provider"`
VendorName string `json:"vendorName"`
Profile struct {
CredentialID string `json:"credentialId"`
} `json:"profile"`
Links struct {
Verify struct {
Href string `json:"href"`
Hints struct {
Allow []string `json:"allow"`
} `json:"hints"`
} `json:"verify"`
} `json:"_links"`
}
func (r *AuthnResponse) GetSupportedFactors() []Factor {
var supported []Factor
for _, v := range r.Embedded.Factors {
postAllowed := false
if strings.HasPrefix(v.FactorType, "token") || v.FactorType == "push" {
for _, verb := range v.Links.Verify.Hints.Allow {
if verb == "POST" {
postAllowed = true
}
}
if postAllowed {
supported = append(supported, v)
}
}
}
return supported
}
// https://developer.okta.com/docs/api/resources/factors#verify-totp-factor
// https://developer.okta.com/docs/api/resources/factors#verify-token-factor
func (f Factor) VerifyOTP(stateToken string, code string) (*AuthnResponse, error) {
if !strings.HasPrefix(f.FactorType, "token") {
return nil, fmt.Errorf(
"can not VerifyOTP on a factor type of %s", f.FactorType)
}
data, _ := json.Marshal(map[string]string{
"passCode": code,
"stateToken": stateToken,
})
req, err := http.NewRequest("POST",
f.Links.Verify.Href, bytes.NewBuffer(data))
if err != nil {
return nil, err
}
req.Header.Add("Accept", "application/json")
req.Header.Add("Content-Type", "application/json")
client := http.Client{}
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
var errors ErrorResponse
_ = json.Unmarshal(body, &errors)
return nil, &errorResponse{
HTTPCode: resp.StatusCode,
Response: errors,
}
}
var verifyResp AuthnResponse
err = json.Unmarshal(body, &verifyResp)
if err != nil {
return nil, err
}
return &verifyResp, nil
}
// https://developer.okta.com/docs/api/resources/factors#verify-push-factor
// API diverges quite a bit from the API reference, this is the result of
// trial and error.
func (f Factor) VerifyPush(
stateToken string,
userAgent string,
pollInterval time.Duration,
pollTimeout time.Duration) (*AuthnResponse, error) {
if f.FactorType != "push" {
return nil, fmt.Errorf(
"can not VerifyPush on a factor type of %s", f.FactorType)
}
if len(userAgent) == 0 {
return nil, errors.New(
"a valid HTTP User-Agent is required when verifying a push factor")
}
data, _ := json.Marshal(map[string]string{
"stateToken": stateToken,
})
req, err := http.NewRequest("POST",
f.Links.Verify.Href, bytes.NewBuffer(data))
if err != nil {
return nil, err
}
req.Header.Add("Accept", "application/json")
req.Header.Add("Content-Type", "application/json")
req.Header.Add("User-Agent", userAgent)
client := http.Client{}
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var errors ErrorResponse
_ = json.Unmarshal(body, &errors)
return nil, &errorResponse{
HTTPCode: resp.StatusCode,
Response: errors,
}
}
return pollPushResult(resp, pollInterval, time.Now().Add(pollTimeout))
}
func pollPushResult(
resp *http.Response, interval time.Duration, until time.Time,
) (*AuthnResponse, error) {
client := http.Client{}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var pushResult AuthnResponse
err = json.Unmarshal(body, &pushResult)
if err != nil {
return nil, err
}
for time.Now().Before(until) &&
pushResult.Status == "MFA_CHALLENGE" &&
pushResult.FactorResult == "WAITING" {
data, _ := json.Marshal(map[string]string{
"stateToken": pushResult.StateToken,
})
req, err := http.NewRequest("POST",
pushResult.Links.Next.Href, bytes.NewBuffer(data))
if err != nil {
return nil, err
}
req.Header.Add("Accept", "application/json")
req.Header.Add("Content-Type", "application/json")
time.Sleep(interval)
resp, err = client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err = ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
var errors ErrorResponse
_ = json.Unmarshal(body, &errors)
return nil, &errorResponse{
HTTPCode: resp.StatusCode,
Response: errors,
}
}
err = json.Unmarshal(body, &pushResult)
if err != nil {
return nil, err
}
}
return &pushResult, nil
}