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// Copyright 2025 The Sigstore Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package auth
import (
"context"
"errors"
"os"
"path/filepath"
"testing"
"github.com/sigstore/cosign/v2/pkg/providers"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var (
// Generated from https://justtrustme.dev/token?sub=test-subject
dummyJWT = "eyJhbGciOiJSUzI1NiIsImtpZCI6ImFhOWE1YjA5LTExMzktNGU2YS1hNjMxLTA2ZTU3NDU4NzI0MSJ9.eyJleHAiOjE3NTM4MzY1NTIsImlhdCI6MTc1MzgzNDc1MiwiaXNzIjoiaHR0cHM6Ly9qdXN0dHJ1c3RtZS5kZXYiLCJzdWIiOiJ0ZXN0LXN1YmplY3QifQ.WWNGLWQsSDcz0cFlGbMfmLkGaMpiAsVfik2vAj_YPIXNG6jgkMmIF69TbrwH-qlSfKNNI1GTktxlufsQwOUiseVdqV7fOCdvPhQsozHye8JT-AgZ9wcH3DGcdp-5R5KOKlFNXHFcBjI9lS0KIelWoJLj8YzisOi0hWRdAwpJwuselV-d7IlcLZhJiZO3n-d15YB4fRMpjTr_aj--hdec7ywzmCQqKL3XdAjAmR99JExMKs_w25-6K7akjVSE1lljf8Wf9CBfOlwvWKxXPvIwzE0DC2yWS103yWfGHEf3UbKPlF34Xqo6beHTnf9uiO0HdWTaQp2e0eShsQDX9hpIeg"
)
func Test_idToken(t *testing.T) {
td := t.TempDir()
tokenFile := filepath.Join(td, "token.jwt")
err := os.WriteFile(tokenFile, []byte(dummyJWT), 0600)
require.NoError(t, err)
nonExistentFile := filepath.Join(td, "nonexistent")
tests := []struct {
name string
s string
want string
wantErr bool
}{
{
name: "empty string",
s: "",
want: "",
},
{
name: "valid jwt",
s: dummyJWT,
want: dummyJWT,
},
{
name: "not a jwt or file",
s: "not-a-jwt",
wantErr: true,
},
{
name: "file path",
s: tokenFile,
want: dummyJWT,
},
{
name: "non-existent file",
s: nonExistentFile,
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := idToken(tt.s)
if (err != nil) != tt.wantErr {
t.Errorf("idToken() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("idToken() = %v, want %v", got, tt.want)
}
})
}
}
type mockProvider struct {
token string
err error
}
func (m *mockProvider) Enabled(_ context.Context) bool {
return true
}
func (m *mockProvider) Provide(_ context.Context, _ string) (string, error) {
return m.token, m.err
}
func TestReadIDToken(t *testing.T) {
ctx := context.Background()
td := t.TempDir()
tokenFile := filepath.Join(td, "token.jwt")
err := os.WriteFile(tokenFile, []byte(dummyJWT), 0600)
require.NoError(t, err)
providers.Register("mock-success", &mockProvider{token: "mock-token"})
providers.Register("mock-fail", &mockProvider{err: errors.New("mock error")})
tests := []struct {
name string
tokOrPath string
disableProviders bool
oidcProvider string
want string
wantErr bool
}{
{
name: "raw token",
tokOrPath: dummyJWT,
want: dummyJWT,
},
{
name: "token from file",
tokOrPath: tokenFile,
want: dummyJWT,
},
{
name: "no token, providers disabled",
tokOrPath: "",
disableProviders: true,
want: "",
},
{
name: "no token, specific provider success",
tokOrPath: "",
oidcProvider: "mock-success",
want: "mock-token",
},
{
name: "no token, specific provider fail",
tokOrPath: "",
oidcProvider: "mock-fail",
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := ReadIDToken(ctx, tt.tokOrPath, tt.disableProviders, tt.oidcProvider)
if (err != nil) != tt.wantErr {
t.Errorf("ReadIDToken() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("ReadIDToken() = %v, want %v", got, tt.want)
}
})
}
}
func TestGetOAuthFlow(t *testing.T) {
tests := []struct {
name string
authFlow string
idToken string
want string
}{
{
name: "auth flow set explicitly",
authFlow: "client_credentials",
want: "client_credentials",
},
{
name: "id token set",
idToken: dummyJWT,
want: "token",
},
// Other flows can't be easily tested due to lack of interactivity
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := GetOAuthFlow(context.Background(), tt.authFlow, tt.idToken, false)
if err != nil {
t.Errorf("GetOAuthFlow() error = %v", err)
}
if got != tt.want {
t.Errorf("GetOAuthFlow() = %v, want %v", got, tt.want)
}
})
}
}
func TestAuthenticateCaller(t *testing.T) {
t.Run("token flow", func(t *testing.T) {
subject, token, err := AuthenticateCaller("token", dummyJWT, "", "", "", "")
require.NoError(t, err)
assert.Equal(t, "test-subject", subject)
assert.Equal(t, dummyJWT, token)
})
t.Run("unsupported flow", func(t *testing.T) {
_, _, err := AuthenticateCaller("bad-flow", "", "", "", "", "")
require.Error(t, err)
assert.Contains(t, err.Error(), "unsupported oauth flow")
})
}
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