/
validator_test.go
213 lines (197 loc) · 5.25 KB
/
validator_test.go
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package gchatidtokenvalidator
import (
"bytes"
"context"
"crypto"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/base64"
"encoding/json"
"encoding/pem"
"io/ioutil"
"math/big"
"net/http"
"testing"
"time"
)
const (
keyID = "1234"
testAudience = "test-audience"
expiry int64 = 233431200
)
var (
beforeExp = func() time.Time { return time.Unix(expiry-1, 0) }
afterExp = func() time.Time { return time.Unix(expiry+1, 0) }
)
func TestValidateRS256(t *testing.T) {
idToken, cert := createRS256JWT(t)
_, wrongCert := createRS256JWT(t)
tests := []struct {
name string
keyID string
cert []byte
nowFunc func() time.Time
wantErr bool
}{
{
name: "works",
keyID: keyID,
cert: cert,
nowFunc: beforeExp,
wantErr: false,
},
{
name: "no matching key",
keyID: "5678",
cert: cert,
nowFunc: beforeExp,
wantErr: true,
},
{
name: "malformed certificate",
keyID: keyID,
cert: []byte("-----BEGIN CERTIFICATE-----"),
nowFunc: beforeExp,
wantErr: true,
},
{
name: "wrong certificate",
keyID: keyID,
cert: wrongCert,
nowFunc: beforeExp,
wantErr: true,
},
{
name: "token expired",
keyID: keyID,
cert: cert,
nowFunc: afterExp,
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
client := &http.Client{
Transport: RoundTripFn(func(req *http.Request) *http.Response {
cr := &certResponse{
tt.keyID: string(tt.cert),
}
b, err := json.Marshal(&cr)
if err != nil {
t.Fatalf("unable to marshal response: %v", err)
}
return &http.Response{
StatusCode: 200,
Body: ioutil.NopCloser(bytes.NewReader(b)),
Header: make(http.Header),
}
}),
}
defaultValidator = &Validator{client: newCachingClient(client)}
oldNow := now
defer func() { now = oldNow }()
now = tt.nowFunc
payload, err := defaultValidator.validate(context.Background(), idToken, testAudience)
if tt.wantErr && err != nil {
// Got the error we wanted.
return
}
if !tt.wantErr && err != nil {
t.Fatalf("Validate(ctx, %s, %s): got err %q, want nil", idToken, testAudience, err)
}
if tt.wantErr && err == nil {
t.Fatalf("Validate(ctx, %s, %s): got nil err, want err", idToken, testAudience)
}
if payload == nil {
t.Fatalf("Got nil payload, err: %v", err)
}
if payload.Audience != testAudience {
t.Fatalf("Validate(ctx, %s, %s): got %v, want %v", idToken, testAudience, payload.Audience, testAudience)
}
if len(payload.Claims) == 0 {
t.Fatalf("Validate(ctx, %s, %s): missing Claims map. payload.Claims = %+v", idToken, testAudience, payload.Claims)
}
if got, ok := payload.Claims["aud"]; !ok {
t.Fatalf("Validate(ctx, %s, %s): missing aud claim. payload.Claims = %+v", idToken, testAudience, payload.Claims)
} else {
got, ok := got.(string)
if !ok {
t.Fatalf("Validate(ctx, %s, %s): aud wasn't a string. payload.Claims = %+v", idToken, testAudience, payload.Claims)
}
if got != testAudience {
t.Fatalf("Validate(ctx, %s, %s): Payload[aud] want %v got %v", idToken, testAudience, testAudience, got)
}
}
})
}
}
func createRS256JWT(t *testing.T) (string, []byte) {
t.Helper()
token := commonToken(t, "RS256")
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
t.Fatalf("unable to generate key: %v", err)
}
sig, err := rsa.SignPKCS1v15(rand.Reader, privateKey, crypto.SHA256, token.hashedContent())
if err != nil {
t.Fatalf("unable to sign content: %v", err)
}
certPem := generateCertificate(t, privateKey)
token.signature = base64.RawURLEncoding.EncodeToString(sig)
return token.String(), certPem
}
// Generate a pem block with the certificate
func generateCertificate(t *testing.T, privateKey *rsa.PrivateKey) []byte {
tml := x509.Certificate{
// you can add any attr that you need
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(5, 0, 0),
// you have to generate a different serial number each execution
SerialNumber: big.NewInt(123123),
Subject: pkix.Name{
CommonName: "New Name",
Organization: []string{"New Org."},
},
BasicConstraintsValid: true,
}
cert, err := x509.CreateCertificate(rand.Reader, &tml, &tml, &privateKey.PublicKey, privateKey)
if err != nil {
t.Fatal("Certificate cannot be created.", err.Error())
}
// Generate a pem block with the certificate
return pem.EncodeToMemory(&pem.Block{
Type: "CERTIFICATE",
Bytes: cert,
})
}
func commonToken(t *testing.T, alg string) *jwt {
t.Helper()
header := jwtHeader{
KeyID: keyID,
Algorithm: alg,
Type: "JWT",
}
payload := Payload{
Issuer: "example.com",
Audience: testAudience,
Expires: expiry,
}
hb, err := json.Marshal(&header)
if err != nil {
t.Fatalf("unable to marshall header: %v", err)
}
pb, err := json.Marshal(&payload)
if err != nil {
t.Fatalf("unable to marshall payload: %v", err)
}
eb := base64.RawURLEncoding.EncodeToString(hb)
ep := base64.RawURLEncoding.EncodeToString(pb)
return &jwt{
header: eb,
payload: ep,
}
}
type RoundTripFn func(req *http.Request) *http.Response
func (f RoundTripFn) RoundTrip(req *http.Request) (*http.Response, error) { return f(req), nil }