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util.go
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util.go
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package oidc
import (
"fmt"
"net/url"
"sort"
"strings"
"time"
oauthelia2 "authelia.com/provider/oauth2"
fjwt "authelia.com/provider/oauth2/token/jwt"
"github.com/go-jose/go-jose/v4"
"golang.org/x/text/language"
)
// IsPushedAuthorizedRequest returns true if the requester has a PushedAuthorizationRequest redirect_uri value.
func IsPushedAuthorizedRequest(r oauthelia2.Requester, prefix string) bool {
return strings.HasPrefix(r.GetRequestForm().Get(FormParameterRequestURI), prefix)
}
// SortedSigningAlgs is a sorting type which allows the use of sort.Sort to order a list of OAuth 2.0 Signing Algs.
// Sorting occurs in the order of from within the RFC's.
type SortedSigningAlgs []string
func (algs SortedSigningAlgs) Len() int {
return len(algs)
}
func (algs SortedSigningAlgs) Less(i, j int) bool {
return isSigningAlgLess(algs[i], algs[j])
}
func (algs SortedSigningAlgs) Swap(i, j int) {
algs[i], algs[j] = algs[j], algs[i]
}
type SortedJSONWebKey []jose.JSONWebKey
func (jwks SortedJSONWebKey) Len() int {
return len(jwks)
}
func (jwks SortedJSONWebKey) Less(i, j int) bool {
if jwks[i].Algorithm == jwks[j].Algorithm {
return jwks[i].KeyID < jwks[j].KeyID
}
return isSigningAlgLess(jwks[i].Algorithm, jwks[j].Algorithm)
}
func (jwks SortedJSONWebKey) Swap(i, j int) {
jwks[i], jwks[j] = jwks[j], jwks[i]
}
//nolint:gocyclo // Low importance func.
func isSigningAlgLess(i, j string) bool {
switch {
case i == j:
return false
case i == SigningAlgNone:
return false
case j == SigningAlgNone:
return true
default:
var (
ip, jp string
it, jt bool
)
if len(i) > 2 {
it = true
ip = i[:2]
}
if len(j) > 2 {
jt = true
jp = j[:2]
}
switch {
case it && jt && ip == jp:
return i < j
case ip == SigningAlgPrefixHMAC:
return true
case jp == SigningAlgPrefixHMAC:
return false
case ip == SigningAlgPrefixRSAPSS:
return false
case jp == SigningAlgPrefixRSAPSS:
return true
case ip == SigningAlgPrefixRSA:
return true
case jp == SigningAlgPrefixRSA:
return false
case ip == SigningAlgPrefixECDSA:
return true
case jp == SigningAlgPrefixECDSA:
return false
default:
return false
}
}
}
// GetLangFromRequester gets the expected language for a requester.
func GetLangFromRequester(requester oauthelia2.Requester) language.Tag {
var (
ctx oauthelia2.G11NContext
ok bool
)
if ctx, ok = requester.(oauthelia2.G11NContext); ok {
return ctx.GetLang()
}
return language.English
}
func toStringSlice(v any) (result []string) {
switch s := v.(type) {
case string:
return []string{s}
case []string:
return s
case []any:
for _, sv := range s {
if ss, ok := sv.(string); ok {
result = append(result, ss)
}
}
return result
default:
return nil
}
}
func toTime(v any, def time.Time) (t time.Time) {
switch a := v.(type) {
case time.Time:
return a
case float64:
return time.Unix(int64(a), 0).UTC()
case int:
return time.Unix(int64(a), 0).UTC()
case int64:
return time.Unix(a, 0).UTC()
default:
return def
}
}
// IsJWTProfileAccessToken validates a *jwt.Token is actually a RFC9068 JWT Profile Access Token by checking the
// relevant header as per https://datatracker.ietf.org/doc/html/rfc9068#section-2.1 which explicitly states that
// the header MUST include a typ of 'at+jwt' or 'application/at+jwt' with a preference of 'at+jwt'.
func IsJWTProfileAccessToken(token *fjwt.Token) bool {
if token == nil || token.Header == nil {
return false
}
var (
raw any
typ string
ok bool
)
if raw, ok = token.Header[JWTHeaderKeyType]; !ok {
return false
}
typ, ok = raw.(string)
return ok && (typ == JWTHeaderTypeValueAccessTokenJWT)
}
// RFC6750Header turns a *oauthelia2.RFC6749Error into the values for a RFC6750 format WWW-Authenticate Bearer response
// header, excluding the Bearer prefix.
func RFC6750Header(realm, scope string, err *oauthelia2.RFC6749Error) string {
values := err.ToValues()
if realm != "" {
values.Set("realm", realm)
}
if scope != "" {
values.Set("scope", scope)
}
//nolint:prealloc
var (
keys []string
key string
)
for key = range values {
keys = append(keys, key)
}
sort.Slice(keys, func(i, j int) bool {
switch keys[i] {
case fieldRFC6750Realm:
return true
case fieldRFC6750Error:
switch keys[j] {
case fieldRFC6750ErrorDescription, fieldRFC6750Scope:
return true
default:
return false
}
case fieldRFC6750ErrorDescription:
switch keys[j] {
case fieldRFC6750Scope:
return true
default:
return false
}
case fieldRFC6750Scope:
switch keys[j] {
case fieldRFC6750Realm, fieldRFC6750Error, fieldRFC6750ErrorDescription:
return false
default:
return keys[i] < keys[j]
}
default:
return keys[i] < keys[j]
}
})
parts := make([]string, len(keys))
var i int
for i, key = range keys {
parts[i] = fmt.Sprintf(`%s="%s"`, key, values.Get(key))
}
return strings.Join(parts, ",")
}
// AccessResponderToClearMap returns a clear friendly map copy of the responder map values.
func AccessResponderToClearMap(responder oauthelia2.AccessResponder) map[string]any {
m := responder.ToMap()
data := make(map[string]any, len(m))
for key, value := range responder.ToMap() {
switch key {
case "access_token":
data[key] = "authelia_at_**************"
case "refresh_token":
data[key] = "authelia_rt_**************"
case "id_token":
data[key] = "*********.***********.*************"
default:
data[key] = value
}
}
return data
}
// PopulateClientCredentialsFlowSessionWithAccessRequest is used to configure a session when performing a client credentials grant.
func PopulateClientCredentialsFlowSessionWithAccessRequest(ctx Context, client oauthelia2.Client, session *Session) (err error) {
var (
issuer *url.URL
)
if issuer, err = ctx.IssuerURL(); err != nil {
return oauthelia2.ErrServerError.WithWrap(err).WithDebugf("Failed to determine the issuer with error: %s.", err.Error())
}
if client == nil {
return oauthelia2.ErrServerError.WithDebug("Failed to get the client for the request.")
}
session.Subject = ""
session.Claims.Subject = client.GetID()
session.ClientID = client.GetID()
session.DefaultSession.Claims.Issuer = issuer.String()
session.DefaultSession.Claims.IssuedAt = ctx.GetClock().Now().UTC()
session.DefaultSession.Claims.RequestedAt = ctx.GetClock().Now().UTC()
session.ClientCredentials = true
return nil
}
// PopulateClientCredentialsFlowRequester is used to grant the authorized scopes and audiences when performing a client
// credentials grant.
func PopulateClientCredentialsFlowRequester(ctx Context, config oauthelia2.Configurator, client oauthelia2.Client, requester oauthelia2.Requester) (err error) {
if client == nil || config == nil || requester == nil {
return oauthelia2.ErrServerError.WithDebug("Failed to get the client, configuration, or requester for the request.")
}
scopes := requester.GetRequestedScopes()
var authz, nauthz bool
for _, scope := range scopes {
switch scope {
case ScopeOffline, ScopeOfflineAccess:
break
case ScopeAutheliaBearerAuthz:
authz = true
default:
nauthz = true
}
}
if authz && nauthz {
return oauthelia2.ErrInvalidScope.WithDebugf("The scope '%s' must only be requested by itself or with the '%s' scope, no other scopes are permitted.", ScopeAutheliaBearerAuthz, ScopeOfflineAccess)
}
return nil
}