/
handler_oidc_authorization_consent.go
265 lines (191 loc) · 11 KB
/
handler_oidc_authorization_consent.go
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package handlers
import (
"errors"
"fmt"
"net/http"
"net/url"
"path"
"strings"
oauthelia2 "authelia.com/provider/oauth2"
"github.com/google/uuid"
"github.com/authelia/authelia/v4/internal/authorization"
"github.com/authelia/authelia/v4/internal/middlewares"
"github.com/authelia/authelia/v4/internal/model"
"github.com/authelia/authelia/v4/internal/oidc"
"github.com/authelia/authelia/v4/internal/session"
)
func handleOIDCAuthorizationConsent(ctx *middlewares.AutheliaCtx, issuer *url.URL, client oidc.Client,
userSession session.UserSession,
rw http.ResponseWriter, r *http.Request, requester oauthelia2.AuthorizeRequester) (consent *model.OAuth2ConsentSession, handled bool) {
var (
subject uuid.UUID
err error
)
var handler handlerAuthorizationConsent
policy := client.GetAuthorizationPolicy()
level := policy.GetRequiredLevel(authorization.Subject{Username: userSession.Username, Groups: userSession.Groups, IP: ctx.RemoteIP()})
switch {
case userSession.IsAnonymous():
handler = handleOIDCAuthorizationConsentNotAuthenticated
case authorization.IsAuthLevelSufficient(userSession.AuthenticationLevel, level):
if subject, err = ctx.Providers.OpenIDConnect.GetSubject(ctx, client.GetSectorIdentifierURI(), userSession.Username); err != nil {
ctx.Logger.Errorf(logFmtErrConsentCantGetSubject, requester.GetID(), client.GetID(), client.GetConsentPolicy(), userSession.Username, client.GetSectorIdentifierURI(), err)
ctx.Providers.OpenIDConnect.WriteAuthorizeError(ctx, rw, requester, oidc.ErrSubjectCouldNotLookup)
return nil, true
}
switch client.GetConsentPolicy().Mode {
case oidc.ClientConsentModeExplicit:
handler = handleOIDCAuthorizationConsentModeExplicit
case oidc.ClientConsentModeImplicit:
handler = handleOIDCAuthorizationConsentModeImplicit
case oidc.ClientConsentModePreConfigured:
handler = handleOIDCAuthorizationConsentModePreConfigured
default:
ctx.Logger.Errorf(logFmtErrConsentCantDetermineConsentMode, requester.GetID(), client.GetID())
ctx.Providers.OpenIDConnect.WriteAuthorizeError(ctx, rw, requester, oauthelia2.ErrServerError.WithHint("Could not determine the client consent mode."))
return nil, true
}
default:
if level == authorization.Denied {
ctx.Logger.Errorf("Authorization Request with id '%s' on client with id '%s' using policy '%s' could not be processed: the user '%s' is not authorized to use this client", requester.GetID(), client.GetID(), policy.Name, userSession.Username)
ctx.Providers.OpenIDConnect.WriteAuthorizeError(ctx, rw, requester, oidc.ErrClientAuthorizationUserAccessDenied)
return nil, true
}
if subject, err = ctx.Providers.OpenIDConnect.GetSubject(ctx, client.GetSectorIdentifierURI(), userSession.Username); err != nil {
ctx.Logger.Errorf(logFmtErrConsentCantGetSubject, requester.GetID(), client.GetID(), client.GetConsentPolicy(), userSession.Username, client.GetSectorIdentifierURI(), err)
ctx.Providers.OpenIDConnect.WriteAuthorizeError(ctx, rw, requester, oidc.ErrSubjectCouldNotLookup)
return nil, true
}
handler = handleOIDCAuthorizationConsentGenerate
}
return handler(ctx, issuer, client, userSession, subject, rw, r, requester)
}
func handleOIDCAuthorizationConsentNotAuthenticated(ctx *middlewares.AutheliaCtx, issuer *url.URL, _ oidc.Client,
_ session.UserSession, _ uuid.UUID,
rw http.ResponseWriter, r *http.Request, requester oauthelia2.AuthorizeRequester) (consent *model.OAuth2ConsentSession, handled bool) {
redirectionURL := handleOIDCAuthorizationConsentGetRedirectionURL(ctx, issuer, nil, requester, r.Form)
handleOIDCPushedAuthorizeConsent(ctx, requester, r.Form)
http.Redirect(rw, r, redirectionURL.String(), http.StatusFound)
return nil, true
}
func handleOIDCAuthorizationConsentGenerate(ctx *middlewares.AutheliaCtx, issuer *url.URL, client oidc.Client,
userSession session.UserSession, subject uuid.UUID,
rw http.ResponseWriter, r *http.Request, requester oauthelia2.AuthorizeRequester) (consent *model.OAuth2ConsentSession, handled bool) {
var (
err error
)
ctx.Logger.Debugf(logFmtDbgConsentGenerate, requester.GetID(), client.GetID(), client.GetConsentPolicy())
if len(ctx.QueryArgs().PeekBytes(qryArgConsentID)) != 0 {
ctx.Logger.Errorf(logFmtErrConsentGenerateError, requester.GetID(), client.GetID(), client.GetConsentPolicy(), "generating", errors.New("consent id value was present when it should be absent"))
ctx.Providers.OpenIDConnect.WriteAuthorizeError(ctx, rw, requester, oidc.ErrConsentCouldNotGenerate)
return nil, true
}
if consent, err = handleOpenIDConnectNewConsentSession(subject, requester, ctx.Providers.OpenIDConnect.GetPushedAuthorizeRequestURIPrefix(ctx)); err != nil {
ctx.Logger.Errorf(logFmtErrConsentGenerateError, requester.GetID(), client.GetID(), client.GetConsentPolicy(), "generating", err)
ctx.Providers.OpenIDConnect.WriteAuthorizeError(ctx, rw, requester, oidc.ErrConsentCouldNotGenerate)
return nil, true
}
if err = ctx.Providers.StorageProvider.SaveOAuth2ConsentSession(ctx, *consent); err != nil {
ctx.Logger.Errorf(logFmtErrConsentGenerateError, requester.GetID(), client.GetID(), client.GetConsentPolicy(), "saving", err)
ctx.Providers.OpenIDConnect.WriteAuthorizeError(ctx, rw, requester, oidc.ErrConsentCouldNotSave)
return nil, true
}
handleOIDCAuthorizationConsentRedirect(ctx, issuer, consent, client, userSession, rw, r, requester)
return consent, true
}
func handleOIDCAuthorizationConsentRedirect(ctx *middlewares.AutheliaCtx, issuer *url.URL, consent *model.OAuth2ConsentSession, client oidc.Client,
userSession session.UserSession, rw http.ResponseWriter, r *http.Request, requester oauthelia2.AuthorizeRequester) {
var location *url.URL
if client.IsAuthenticationLevelSufficient(userSession.AuthenticationLevel, authorization.Subject{Username: userSession.Username, Groups: userSession.Groups, IP: ctx.RemoteIP()}) {
location, _ = url.ParseRequestURI(issuer.String())
location.Path = path.Join(location.Path, oidc.EndpointPathConsent)
query := location.Query()
query.Set(queryArgID, consent.ChallengeID.String())
location.RawQuery = query.Encode()
ctx.Logger.Debugf(logFmtDbgConsentAuthenticationSufficiency, requester.GetID(), client.GetID(), client.GetConsentPolicy(), userSession.AuthenticationLevel.String(), "sufficient", client.GetAuthorizationPolicyRequiredLevel(authorization.Subject{Username: userSession.Username, Groups: userSession.Groups, IP: ctx.RemoteIP()}))
} else {
location = handleOIDCAuthorizationConsentGetRedirectionURL(ctx, issuer, consent, requester, r.Form)
ctx.Logger.Debugf(logFmtDbgConsentAuthenticationSufficiency, requester.GetID(), client.GetID(), client.GetConsentPolicy(), userSession.AuthenticationLevel.String(), "insufficient", client.GetAuthorizationPolicyRequiredLevel(authorization.Subject{Username: userSession.Username, Groups: userSession.Groups, IP: ctx.RemoteIP()}))
}
handleOIDCPushedAuthorizeConsent(ctx, requester, r.Form)
ctx.Logger.Debugf(logFmtDbgConsentRedirect, requester.GetID(), client.GetID(), client.GetConsentPolicy(), location)
http.Redirect(rw, r, location.String(), http.StatusFound)
}
func handleOIDCPushedAuthorizeConsent(ctx *middlewares.AutheliaCtx, requester oauthelia2.AuthorizeRequester, form url.Values) {
if !oidc.IsPushedAuthorizedRequest(requester, ctx.Providers.OpenIDConnect.GetPushedAuthorizeRequestURIPrefix(ctx)) {
return
}
par, err := ctx.Providers.StorageProvider.LoadOAuth2PARContext(ctx, form.Get(oidc.FormParameterRequestURI))
if err != nil {
ctx.Logger.WithError(err).Warnf("Authorization Request with id '%s' on client with id '%s' encountered a storage error while trying to make the Pushed Authorize Request session available for consent", requester.GetID(), requester.GetClient().GetID())
return
}
par.Revoked = false
if err = ctx.Providers.StorageProvider.UpdateOAuth2PARContext(ctx, *par); err != nil {
ctx.Logger.WithError(err).Warnf("Authorization Request with id '%s' on client with id '%s' encountered a storage error while trying to make the Pushed Authorize Request session available for consent", requester.GetID(), requester.GetClient().GetID())
return
}
}
func handleOIDCAuthorizationConsentGetRedirectionURL(_ *middlewares.AutheliaCtx, issuer *url.URL, consent *model.OAuth2ConsentSession, requester oauthelia2.AuthorizeRequester, form url.Values) (redirectURL *url.URL) {
iss := issuer.String()
if !strings.HasSuffix(iss, "/") {
iss += "/"
}
redirectURL, _ = url.ParseRequestURI(iss)
query := redirectURL.Query()
query.Set(queryArgWorkflow, workflowOpenIDConnect)
switch {
case consent != nil:
query.Set(queryArgWorkflowID, consent.ChallengeID.String())
case form != nil:
rd, _ := url.ParseRequestURI(iss)
rd.Path = path.Join(rd.Path, oidc.EndpointPathAuthorization)
rd.RawQuery = form.Encode()
query.Set(queryArgRD, rd.String())
case requester != nil:
rd, _ := url.ParseRequestURI(iss)
rd.Path = path.Join(rd.Path, oidc.EndpointPathAuthorization)
rd.RawQuery = requester.GetRequestForm().Encode()
query.Set(queryArgRD, rd.String())
}
redirectURL.RawQuery = query.Encode()
return redirectURL
}
func handleOpenIDConnectNewConsentSession(subject uuid.UUID, requester oauthelia2.AuthorizeRequester, prefixPAR string) (consent *model.OAuth2ConsentSession, err error) {
if oidc.IsPushedAuthorizedRequest(requester, prefixPAR) {
form := url.Values{}
form.Set(oidc.FormParameterRequestURI, requester.GetRequestForm().Get(oidc.FormParameterRequestURI))
if requester.GetRequestForm().Has(oidc.FormParameterClientID) {
form.Set(oidc.FormParameterClientID, requester.GetRequestForm().Get(oidc.FormParameterClientID))
}
return model.NewOAuth2ConsentSessionWithForm(subject, requester, form)
}
return model.NewOAuth2ConsentSession(subject, requester)
}
func verifyOIDCUserAuthorizedForConsent(ctx *middlewares.AutheliaCtx, client oidc.Client, userSession session.UserSession, consent *model.OAuth2ConsentSession, subject uuid.UUID) (err error) {
var sid uint32
if client == nil {
if client, err = ctx.Providers.OpenIDConnect.GetFullClient(ctx, consent.ClientID); err != nil {
return fmt.Errorf("failed to retrieve client: %w", err)
}
}
if sid = subject.ID(); sid == 0 {
if subject, err = ctx.Providers.OpenIDConnect.GetSubject(ctx, client.GetSectorIdentifierURI(), userSession.Username); err != nil {
return fmt.Errorf("failed to lookup subject: %w", err)
}
sid = subject.ID()
}
if !consent.Subject.Valid {
if sid == 0 {
return fmt.Errorf("the consent subject is null for consent session with id '%d' for anonymous user", consent.ID)
}
consent.Subject = model.NullUUID(subject)
if err = ctx.Providers.StorageProvider.SaveOAuth2ConsentSessionSubject(ctx, *consent); err != nil {
return fmt.Errorf("failed to update the consent subject: %w", err)
}
}
if consent.Subject.UUID.ID() != sid {
return fmt.Errorf("the consent subject identifier '%s' isn't owned by user '%s' who has a subject identifier of '%s' with sector identifier '%s'", consent.Subject.UUID, userSession.Username, subject, client.GetSectorIdentifierURI())
}
return nil
}