commit 4982663b9b288c8aa8327652bb73bc28d269ec77 · hailey.at/atproto-oauth-golang

+1 -1

Makefile

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       .PHONY: test

     

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       test: ## Run tests

     

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       	go test ./...

     

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       	go test -v ./...

     

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       .PHONY: coverage-html

     

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       coverage-html: ## Generate test coverage report and open in browser

+77

generic.go

···

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       package oauth

     

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       +
       

     

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       import (

     

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       	"crypto/ecdsa"

     

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       	"crypto/elliptic"

     

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       	"crypto/rand"

     

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       	"fmt"

     

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       	"net/url"

     

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       	"time"

     

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       +
       

     

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       	"github.com/lestrrat-go/jwx/v2/jwk"

     

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       )

     

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       func GenerateKey(kidPrefix *string) (jwk.Key, error) {

     

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       	privKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)

     

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       +
       	if err != nil {

     

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       		return nil, err

     

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       	}

     

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       +
       

     

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       	key, err := jwk.FromRaw(privKey)

     

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       +
       	if err != nil {

     

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       		return nil, err

     

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       +
       	}

     

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       +
       

     

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       +
       	if kidPrefix != nil {

     

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       		kid := fmt.Sprintf("%s-%d", *kidPrefix, time.Now().Unix())

     

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       +
       

     

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       		if err := key.Set(jwk.KeyIDKey, kid); err != nil {

     

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       			return nil, err

     

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       		}

     

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       	}

     

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       	return key, nil

     

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       }

     

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       func isSafeAndParsed(ustr string) (*url.URL, error) {

     

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       	u, err := url.Parse(ustr)

     

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       	if err != nil {

     

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       		return nil, err

     

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       	}

     

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       +
       

     

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       	if u.Scheme != "https" {

     

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       		return nil, fmt.Errorf("input url is not https")

     

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       	}

     

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       +
       

     

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       	if u.Hostname() == "" {

     

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       		return nil, fmt.Errorf("url hostname was empty")

     

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       +
       	}

     

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       	if u.User != nil {

     

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       		return nil, fmt.Errorf("url user was not empty")

     

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       	}

     

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       +
       

     

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       	if u.Port() != "" {

     

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       		return nil, fmt.Errorf("url port was not empty")

     

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       	}

     

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       	return u, nil

     

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       }

     

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       +
       

     

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       func getPrivateKey(key jwk.Key) (*ecdsa.PrivateKey, error) {

     

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       	var pkey ecdsa.PrivateKey

     

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       	if err := key.Raw(&pkey); err != nil {

     

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       		return nil, err

     

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       	}

     

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       	return &pkey, nil

     

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       }

     

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       func getPublicKey(key jwk.Key) (*ecdsa.PublicKey, error) {

     

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       	var pkey ecdsa.PublicKey

     

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       	if err := key.Raw(&pkey); err != nil {

     

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       		return nil, err

     

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       	}

     

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       	return &pkey, nil

     

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       }

+2 -1

go.mod

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       go 1.24.0

     

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       require (

     

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       	github.com/golang-jwt/jwt/v5 v5.2.1

     

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       	github.com/google/uuid v1.4.0

     

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       	github.com/lestrrat-go/jwx/v2 v2.0.12

     

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       	github.com/stretchr/testify v1.10.0

     

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       )

     
···

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       	github.com/davecgh/go-spew v1.1.1 // indirect

     

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       	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect

     

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       	github.com/goccy/go-json v0.10.2 // indirect

     

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       	github.com/golang-jwt/jwt/v5 v5.2.1 // indirect

     

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       	github.com/gorilla/context v1.1.2 // indirect

     

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       	github.com/gorilla/securecookie v1.1.2 // indirect

     

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       	github.com/gorilla/sessions v1.4.0 // indirect

go.sum

···

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       github.com/golang-jwt/jwt v3.2.2+incompatible h1:IfV12K8xAKAnZqdXVzCZ+TOjboZ2keLg81eXfW3O+oY=

     

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       github.com/golang-jwt/jwt/v5 v5.2.1 h1:OuVbFODueb089Lh128TAcimifWaLhJwVflnrgM17wHk=

     

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       github.com/golang-jwt/jwt/v5 v5.2.1/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=

     

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       github.com/google/uuid v1.4.0 h1:MtMxsa51/r9yyhkyLsVeVt0B+BGQZzpQiTQ4eHZ8bc4=

     

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       github.com/google/uuid v1.4.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=

     

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       github.com/gorilla/context v1.1.2 h1:WRkNAv2uoa03QNIc1A6u4O7DAGMUVoopZhkiXWA2V1o=

     

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       github.com/gorilla/context v1.1.2/go.mod h1:KDPwT9i/MeWHiLl90fuTgrt4/wPcv75vFAZLaOOcbxM=

     

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       github.com/gorilla/securecookie v1.1.2 h1:YCIWL56dvtr73r6715mJs5ZvhtnY73hBvEF8kXD8ePA=

+199 -16

oauth.go

···

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       package oauth

     

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       import (

     

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       	"bytes"

     

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       	"context"

     

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       	"crypto/ecdsa"

     

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       	"crypto/rand"

     

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       	"crypto/sha256"

     

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       	"encoding/base64"

     

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       	"encoding/hex"

     

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       	"encoding/json"

     

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       	"fmt"

     

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       	"io"

     

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       	"net/http"

     

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       	"net/url"

     

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       	"time"

     

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       	"github.com/golang-jwt/jwt/v5"

     

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       	"github.com/google/uuid"

     

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       	"github.com/lestrrat-go/jwx/v2/jwk"

     

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       )

     

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       type OauthClient struct {

     

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       	h *http.Client

     

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       	h                *http.Client

     

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       	clientPrivateKey *ecdsa.PrivateKey

     

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       	clientKid        string

     

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       	clientId         string

     

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       	redirectUri      string

     

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       }

     

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       type OauthClientArgs struct {

     

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       	h *http.Client

     

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       	H           *http.Client

     

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       	ClientJwk   []byte

     

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       	ClientId    string

     

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       	RedirectUri string

     

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       }

     

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       func NewOauthClient(args OauthClientArgs) *OauthClient {

     

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       	if args.h == nil {

     

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       		args.h = &http.Client{

     

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       func NewOauthClient(args OauthClientArgs) (*OauthClient, error) {

     

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       	if args.ClientId == "" {

     

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       		return nil, fmt.Errorf("no client id provided")

     

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       +
       	}

     

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       	if args.RedirectUri == "" {

     

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       		return nil, fmt.Errorf("no redirect uri provided")

     

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       	}

     

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       	if args.H == nil {

     

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       		args.H = &http.Client{

     

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       			Timeout: 5 * time.Second,

     

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       		}

     

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       	}

     

       51
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       +
       

     

       52
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       	clientJwk, err := jwk.ParseKey(args.ClientJwk)

     

       53
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       +
       	if err != nil {

     

       54
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       		return nil, err

     

       55
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       +
       	}

     

       56
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       +
       

     

       57
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       +
       	clientPkey, err := getPrivateKey(clientJwk)

     

       58
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       +
       	if err != nil {

     

       59
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       +
       		return nil, fmt.Errorf("could not load private key from provided client jwk: %w", err)

     

       60
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       +
       	}

     

       61
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       +
       

     

       62
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       	kid := clientJwk.KeyID()

     

       63
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       +
       

     

       26
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       	return &OauthClient{

     

       27
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       		h: args.h,

     

       28
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       	}

     

       65
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       		h:                args.H,

     

       66
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       		clientKid:        kid,

     

       67
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       		clientPrivateKey: clientPkey,

     

       68
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       		clientId:         args.ClientId,

     

       69
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       		redirectUri:      args.RedirectUri,

     

       70
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       +
       	}, nil

     

       29
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       }

     

       30
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       func (o *OauthClient) ResolvePDSAuthServer(ctx context.Context, ustr string) (string, error) {

     
···

       110
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       	return metadata, nil

     

       111
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       }

     

       112
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       113
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       -
       // func ClientAssertionJwt(clientId, authServerUrl string, clientSecretJwk jwk.Key) {

     

       114
       114
       -
       // 	clientAssertion := jwt.NewBuilder().Issuer(clientId).Subject(clientId).Audience(authServerUrl).IssuedAt(time.Now().Add()

     

       115
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       -
       // }

     

       155
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       +
       func (o *OauthClient) ClientAssertionJwt(authServerUrl string) (string, error) {

     

       156
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       +
       	claims := jwt.MapClaims{

     

       157
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       +
       		"iss": o.clientId,

     

       158
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       +
       		"sub": o.clientId,

     

       159
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       +
       		"aud": authServerUrl,

     

       160
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       +
       		"jti": uuid.NewString(),

     

       161
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       +
       		"iat": time.Now().Unix(),

     

       162
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       +
       	}

     

       163
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       +
       

     

       164
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       +
       	token := jwt.NewWithClaims(jwt.SigningMethodES256, claims)

     

       165
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       +
       	token.Header["kid"] = o.clientKid

     

       166
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       +
       

     

       167
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       +
       	tokenString, err := token.SignedString(o.clientPrivateKey)

     

       168
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       +
       	if err != nil {

     

       169
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       +
       		return "", err

     

       170
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       +
       	}

     

       171
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       +
       

     

       172
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       +
       	return tokenString, nil

     

       173
       173
       +
       }

     

       174
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       +
       

     

       175
       175
       +
       func (o *OauthClient) AuthServerDpopJwt(method, url, nonce string, privateJwk jwk.Key) (string, error) {

     

       176
       176
       +
       	raw, err := jwk.PublicKeyOf(privateJwk)

     

       177
       177
       +
       	if err != nil {

     

       178
       178
       +
       		return "", err

     

       179
       179
       +
       	}

     

       180
       180
       +
       

     

       181
       181
       +
       	pubJwk, err := jwk.FromRaw(raw)

     

       182
       182
       +
       	if err != nil {

     

       183
       183
       +
       		return "", err

     

       184
       184
       +
       	}

     

       185
       185
       +
       

     

       186
       186
       +
       	b, err := json.Marshal(pubJwk)

     

       187
       187
       +
       	if err != nil {

     

       188
       188
       +
       		return "", err

     

       189
       189
       +
       	}

     

       190
       190
       +
       

     

       191
       191
       +
       	var pubMap map[string]interface{}

     

       192
       192
       +
       	if err := json.Unmarshal(b, &pubMap); err != nil {

     

       193
       193
       +
       		return "", err

     

       194
       194
       +
       	}

     

       195
       195
       +
       

     

       196
       196
       +
       	now := time.Now().Unix()

     

       197
       197
       +
       

     

       198
       198
       +
       	claims := jwt.MapClaims{

     

       199
       199
       +
       		"jti": uuid.NewString(),

     

       200
       200
       +
       		"htm": method,

     

       201
       201
       +
       		"htu": url,

     

       202
       202
       +
       		"iat": now,

     

       203
       203
       +
       		"exp": now + 30,

     

       204
       204
       +
       	}

     

       205
       205
       +
       

     

       206
       206
       +
       	if nonce != "" {

     

       207
       207
       +
       		claims["nonce"] = nonce

     

       208
       208
       +
       	}

     

       209
       209
       +
       

     

       210
       210
       +
       	token := jwt.NewWithClaims(jwt.SigningMethodES256, claims)

     

       211
       211
       +
       	token.Header["typ"] = "dpop+jwt"

     

       212
       212
       +
       	token.Header["alg"] = "ES256"

     

       213
       213
       +
       	token.Header["jwk"] = pubMap

     

       214
       214
       +
       

     

       215
       215
       +
       	var rawKey interface{}

     

       216
       216
       +
       	if err := privateJwk.Raw(&rawKey); err != nil {

     

       217
       217
       +
       		return "", err

     

       218
       218
       +
       	}

     

       219
       219
       +
       

     

       220
       220
       +
       	tokenString, err := token.SignedString(rawKey)

     

       221
       221
       +
       	if err != nil {

     

       222
       222
       +
       		return "", fmt.Errorf("failed to sign token: %w", err)

     

       223
       223
       +
       	}

     

       224
       224
       +
       

     

       225
       225
       +
       	return tokenString, nil

     

       226
       226
       +
       }

     

       227
       227
       +
       

     

       228
       228
       +
       func (o *OauthClient) SendParAuthRequest(ctx context.Context, authServerUrl string, authServerMeta *OauthAuthorizationMetadata, loginHint, scope string, dpopPrivateKey jwk.Key) (any, error) {

     

       229
       229
       +
       	if authServerMeta == nil {

     

       230
       230
       +
       		return nil, fmt.Errorf("nil metadata provided")

     

       231
       231
       +
       	}

     

       232
       232
       +
       

     

       233
       233
       +
       	parUrl := authServerMeta.PushedAuthorizationRequestEndpoint

     

       234
       234
       +
       

     

       235
       235
       +
       	state, err := generateToken(10)

     

       236
       236
       +
       	if err != nil {

     

       237
       237
       +
       		return nil, fmt.Errorf("could not generate state token: %w", err)

     

       238
       238
       +
       	}

     

       239
       239
       +
       

     

       240
       240
       +
       	pkceVerifier, err := generateToken(48)

     

       241
       241
       +
       	if err != nil {

     

       242
       242
       +
       		return nil, fmt.Errorf("could not generate pkce verifier: %w", err)

     

       243
       243
       +
       	}

     

       244
       244
       +
       

     

       245
       245
       +
       	codeChallenge := generateCodeChallenge(pkceVerifier)

     

       246
       246
       +
       	codeChallengeMethod := "S256"

     

       247
       247
       +
       

     

       248
       248
       +
       	clientAssertion, err := o.ClientAssertionJwt(authServerUrl)

     

       249
       249
       +
       	if err != nil {

     

       250
       250
       +
       		return nil, err

     

       251
       251
       +
       	}

     

       252
       252
       +
       

     

       253
       253
       +
       	// TODO: ??

     

       254
       254
       +
       	nonce := ""

     

       255
       255
       +
       	dpopProof, err := o.AuthServerDpopJwt("POST", parUrl, nonce, dpopPrivateKey)

     

       256
       256
       +
       	if err != nil {

     

       257
       257
       +
       		return nil, err

     

       258
       258
       +
       	}

     

       259
       259
       +
       

     

       260
       260
       +
       	parBody := map[string]string{

     

       261
       261
       +
       		"response_type":         "code",

     

       262
       262
       +
       		"code_challenge":        codeChallenge,

     

       263
       263
       +
       		"code_challenge_method": codeChallengeMethod,

     

       264
       264
       +
       		"client_id":             o.clientId,

     

       265
       265
       +
       		"state":                 state,

     

       266
       266
       +
       		"redirect_uri":          o.redirectUri,

     

       267
       267
       +
       		"scope":                 scope,

     

       268
       268
       +
       		"client_assertion_type": "urn:ietf:params:oauth:client-assertion-type:jwt-bearer",

     

       269
       269
       +
       		"client_assertion":      clientAssertion,

     

       270
       270
       +
       	}

     

       271
       271
       +
       

     

       272
       272
       +
       	if loginHint != "" {

     

       273
       273
       +
       		parBody["login_hint"] = loginHint

     

       274
       274
       +
       	}

     

       275
       275
       +
       

     

       276
       276
       +
       	_, err = isSafeAndParsed(parUrl)

     

       277
       277
       +
       	if err != nil {

     

       278
       278
       +
       		return nil, err

     

       279
       279
       +
       	}

     

       280
       280
       +
       

     

       281
       281
       +
       	b, err := json.Marshal(parBody)

     

       282
       282
       +
       	if err != nil {

     

       283
       283
       +
       		return nil, err

     

       284
       284
       +
       	}

     

       116
       285
        
       

     

       117
       117
       -
       func isSafeAndParsed(ustr string) (*url.URL, error) {

     

       118
       118
       -
       	u, err := url.Parse(ustr)

     

       286
       286
       +
       	req, err := http.NewRequestWithContext(ctx, "POST", parUrl, bytes.NewReader(b))

     

       119
       287
        
       	if err != nil {

     

       120
       288
        
       		return nil, err

     

       121
       289
        
       	}

     

       122
       290
        
       

     

       123
       123
       -
       	if u.Scheme != "https" {

     

       124
       124
       -
       		return nil, fmt.Errorf("input url is not https")

     

       291
       291
       +
       	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

     

       292
       292
       +
       	req.Header.Add("DPoP", dpopProof)

     

       293
       293
       +
       

     

       294
       294
       +
       	return nil, nil

     

       295
       295
       +
       }

     

       296
       296
       +
       

     

       297
       297
       +
       func generateToken(len int) (string, error) {

     

       298
       298
       +
       	b := make([]byte, len)

     

       299
       299
       +
       	if _, err := rand.Read(b); err != nil {

     

       300
       300
       +
       		return "", err

     

       125
       301
        
       	}

     

       126
       302
        
       

     

       127
       127
       -
       	return u, nil

     

       303
       303
       +
       	return hex.EncodeToString(b), nil

     

       304
       304
       +
       }

     

       305
       305
       +
       

     

       306
       306
       +
       func generateCodeChallenge(pkceVerifier string) string {

     

       307
       307
       +
       	h := sha256.New()

     

       308
       308
       +
       	h.Write([]byte(pkceVerifier))

     

       309
       309
       +
       	hash := h.Sum(nil)

     

       310
       310
       +
       	return base64.RawURLEncoding.EncodeToString(hash)

     

       128
       311
        
       }

+32 -1

oauth_test.go

···

       2
       2
        
       

     

       3
       3
        
       import (

     

       4
       4
        
       	"context"

     

       5
       5
       +
       	"encoding/json"

     

       5
       6
        
       	"testing"

     

       6
       7
        
       

     

       7
       8
        
       	"github.com/stretchr/testify/assert"

     
···

       9
       10
        
       

     

       10
       11
        
       var (

     

       11
       12
        
       	ctx         = context.Background()

     

       12
       12
       -
       	oauthClient = NewOauthClient(OauthClientArgs{})

     

       13
       13
       +
       	oauthClient = newTestOauthClient()

     

       13
       14
        
       )

     

       14
       15
        
       

     

       16
       16
       +
       func newTestOauthClient() *OauthClient {

     

       17
       17
       +
       	prefix := "testing"

     

       18
       18
       +
       	testKey, err := GenerateKey(&prefix)

     

       19
       19
       +
       	if err != nil {

     

       20
       20
       +
       		panic(err)

     

       21
       21
       +
       	}

     

       22
       22
       +
       

     

       23
       23
       +
       	b, err := json.Marshal(testKey)

     

       24
       24
       +
       	if err != nil {

     

       25
       25
       +
       		panic(err)

     

       26
       26
       +
       	}

     

       27
       27
       +
       

     

       28
       28
       +
       	c, err := NewOauthClient(OauthClientArgs{

     

       29
       29
       +
       		ClientJwk: b,

     

       30
       30
       +
       	})

     

       31
       31
       +
       	if err != nil {

     

       32
       32
       +
       		panic(err)

     

       33
       33
       +
       	}

     

       34
       34
       +
       

     

       35
       35
       +
       	return c

     

       36
       36
       +
       }

     

       37
       37
       +
       

     

       15
       38
        
       func TestResolvePDSAuthServer(t *testing.T) {

     

       16
       39
        
       	assert := assert.New(t)

     

       17
       40
        
       

     
···

       30
       53
        
       	assert.NoError(err)

     

       31
       54
        
       	assert.IsType(OauthAuthorizationMetadata{}, meta)

     

       32
       55
        
       }

     

       56
       56
       +
       

     

       57
       57
       +
       func TestGenerateKey(t *testing.T) {

     

       58
       58
       +
       	assert := assert.New(t)

     

       59
       59
       +
       

     

       60
       60
       +
       	prefix := "testing"

     

       61
       61
       +
       	_, err := GenerateKey(&prefix)

     

       62
       62
       +
       	assert.NoError(err)

     

       63
       63
       +
       }

-20

types.go

···

       65
       65
        
       

     

       66
       66
        
       	iu, err := url.Parse(oam.Issuer)

     

       67
       67
        
       	if err != nil {

     

       68
       68
       -
       		oam = nil

     

       69
       68
        
       		return err

     

       70
       69
        
       	}

     

       71
       70
        
       

     

       72
       71
        
       	if iu.Hostname() != fetch_url.Hostname() {

     

       73
       73
       -
       		oam = nil

     

       74
       72
        
       		return fmt.Errorf("issuer hostname does not match fetch url hostname")

     

       75
       73
        
       	}

     

       76
       74
        
       

     

       77
       75
        
       	if iu.Scheme != "https" {

     

       78
       78
       -
       		oam = nil

     

       79
       76
        
       		return fmt.Errorf("issuer url is not https")

     

       80
       77
        
       	}

     

       81
       78
        
       

     

       82
       79
        
       	if iu.Port() != "" {

     

       83
       83
       -
       		oam = nil

     

       84
       80
        
       		return fmt.Errorf("issuer port is not empty")

     

       85
       81
        
       	}

     

       86
       82
        
       

     

       87
       83
        
       	if iu.Path != "" && iu.Path != "/" {

     

       88
       88
       -
       		oam = nil

     

       89
       84
        
       		return fmt.Errorf("issuer path is not /")

     

       90
       85
        
       	}

     

       91
       86
        
       

     

       92
       87
        
       	if iu.RawQuery != "" {

     

       93
       93
       -
       		oam = nil

     

       94
       88
        
       		return fmt.Errorf("issuer url params are not empty")

     

       95
       89
        
       	}

     

       96
       90
        
       

     

       97
       91
        
       	if !tokenInSet("code", oam.ResponseTypesSupported) {

     

       98
       98
       -
       		oam = nil

     

       99
       92
        
       		return fmt.Errorf("`code` is not in response_types_supported")

     

       100
       93
        
       	}

     

       101
       94
        
       

     

       102
       95
        
       	if !tokenInSet("authorization_code", oam.GrantTypesSupported) {

     

       103
       103
       -
       		oam = nil

     

       104
       96
        
       		return fmt.Errorf("`authorization_code` is not in grant_types_supported")

     

       105
       97
        
       	}

     

       106
       98
        
       

     

       107
       99
        
       	if !tokenInSet("refresh_token", oam.GrantTypesSupported) {

     

       108
       108
       -
       		oam = nil

     

       109
       100
        
       		return fmt.Errorf("`refresh_token` is not in grant_types_supported")

     

       110
       101
        
       	}

     

       111
       102
        
       

     

       112
       103
        
       	if !tokenInSet("S256", oam.CodeChallengeMethodsSupported) {

     

       113
       113
       -
       		oam = nil

     

       114
       104
        
       		return fmt.Errorf("`S256` is not in code_challenge_methods_supported")

     

       115
       105
        
       	}

     

       116
       106
        
       

     

       117
       107
        
       	if !tokenInSet("none", oam.TokenEndpointAuthMethodsSupported) {

     

       118
       118
       -
       		oam = nil

     

       119
       108
        
       		return fmt.Errorf("`none` is not in token_endpoint_auth_methods_supported")

     

       120
       109
        
       	}

     

       121
       110
        
       

     

       122
       111
        
       	if !tokenInSet("private_key_jwt", oam.TokenEndpointAuthMethodsSupported) {

     

       123
       123
       -
       		oam = nil

     

       124
       112
        
       		return fmt.Errorf("`private_key_jwt` is not in token_endpoint_auth_methods_supported")

     

       125
       113
        
       	}

     

       126
       114
        
       

     

       127
       115
        
       	if !tokenInSet("ES256", oam.TokenEndpointAuthSigningAlgValuesSupported) {

     

       128
       128
       -
       		oam = nil

     

       129
       116
        
       		return fmt.Errorf("`ES256` is not in token_endpoint_auth_signing_alg_values_supported")

     

       130
       117
        
       	}

     

       131
       118
        
       

     

       132
       119
        
       	if !tokenInSet("atproto", oam.ScopesSupported) {

     

       133
       133
       -
       		oam = nil

     

       134
       120
        
       		return fmt.Errorf("`atproto` is not in scopes_supported")

     

       135
       121
        
       	}

     

       136
       122
        
       

     

       137
       123
        
       	if oam.AuthorizationResponseISSParameterSupported != true {

     

       138
       138
       -
       		oam = nil

     

       139
       124
        
       		return fmt.Errorf("authorization_response_iss_parameter_supported is not true")

     

       140
       125
        
       	}

     

       141
       126
        
       

     

       142
       127
        
       	if oam.PushedAuthorizationRequestEndpoint == "" {

     

       143
       143
       -
       		oam = nil

     

       144
       128
        
       		return fmt.Errorf("pushed_authorization_request_endpoint is empty")

     

       145
       129
        
       	}

     

       146
       130
        
       

     

       147
       131
        
       	if oam.RequirePushedAuthorizationRequests == false {

     

       148
       148
       -
       		oam = nil

     

       149
       132
        
       		return fmt.Errorf("require_pushed_authorization_requests is false")

     

       150
       133
        
       	}

     

       151
       134
        
       

     

       152
       135
        
       	if !tokenInSet("ES256", oam.DpopSigningAlgValuesSupported) {

     

       153
       153
       -
       		oam = nil

     

       154
       136
        
       		return fmt.Errorf("`ES256` is not in dpop_signing_alg_values_supported")

     

       155
       137
        
       	}

     

       156
       138
        
       

     

       157
       139
        
       	if oam.RequireRequestUriRegistration != nil && *oam.RequireRequestUriRegistration == false {

     

       158
       158
       -
       		oam = nil

     

       159
       140
        
       		return fmt.Errorf("require_request_uri_registration present in metadata and was false")

     

       160
       141
        
       	}

     

       161
       142
        
       

     

       162
       143
        
       	if oam.ClientIDMetadataDocumentSupported == false {

     

       163
       163
       -
       		oam = nil

     

       164
       144
        
       		return fmt.Errorf("client_id_metadata_document_supported was false")

     

       165
       145
        
       	}

     

       166
       146