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// Copyright 2022 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 identity
import (
"context"
"crypto/x509"
"errors"
"testing"
"github.com/sigstore/fulcio/pkg/config"
)
type testPrincipal struct {
name string
}
func (p testPrincipal) Name(_ context.Context) string {
return p.name
}
func (p testPrincipal) Embed(_ context.Context, _ *x509.Certificate) error {
return nil
}
type testIssuer struct {
match func(context.Context, string) bool
auth func(context.Context, string) (Principal, error)
}
func (i testIssuer) Match(ctx context.Context, url string) bool {
return i.match(ctx, url)
}
func (i testIssuer) Authenticate(ctx context.Context, token string, _ ...config.InsecureOIDCConfigOption) (Principal, error) {
return i.auth(ctx, token)
}
func TestIssuerPool(t *testing.T) {
var (
// Example principals
alice = testPrincipal{`alice`}
bob = testPrincipal{`bob`}
// Example issuers
bobIfExampleCom = testIssuer{
match: func(_ context.Context, url string) bool {
return url == `example.com`
},
auth: func(context.Context, string) (Principal, error) {
return bob, nil
},
}
aliceIfOtherCom = testIssuer{
match: func(_ context.Context, url string) bool {
return url == `other.com`
},
auth: func(context.Context, string) (Principal, error) {
return alice, nil
},
}
matchThenRejectAll = testIssuer{
match: func(context.Context, string) bool {
return true
},
auth: func(context.Context, string) (Principal, error) {
return nil, errors.New(`boooooo`)
},
}
// Example tokens
// iss == example.com
exampleToken = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJleGFtcGxlLmNvbSJ9.eBJFurm45FSlxt9c7r339xkQC7yqn2O9SlBldCFAQhk`
// iss == other.com
otherToken = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJvdGhlci5jb20ifQ.GtTvBmBvm0kPIfBctKDD1GDavmtlQXBQIDjGg6k2kOA`
// iss == bad.com
badToken = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJiYWQuY29tIn0.aW-Zyc3JTnqI0uqc1VzNY9_5BhmhXmUksGaFEiiZCHU`
// bad format token
badFormatToken = `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.??.aW-Zyc3JTnqI0uqc1VzNY9_5BhmhXmUksGaFEiiZCHU`
)
tests := map[string]struct {
Pool IssuerPool
Token string
ExpectedPrincipal Principal
WantErr bool
}{
`example.com only pool should allow example.com tokens`: {
Pool: IssuerPool{bobIfExampleCom},
Token: exampleToken,
ExpectedPrincipal: bob,
WantErr: false,
},
`example.com only pool should not allow other.com tokens`: {
Pool: IssuerPool{bobIfExampleCom},
Token: otherToken,
WantErr: true,
},
`example.com and other.com pool should match other.com token to alice`: {
Pool: IssuerPool{bobIfExampleCom, aliceIfOtherCom},
Token: otherToken,
ExpectedPrincipal: alice,
WantErr: false,
},
`example.com and other.com pool should match example.com token to bob`: {
Pool: IssuerPool{bobIfExampleCom, aliceIfOtherCom},
Token: exampleToken,
ExpectedPrincipal: bob,
WantErr: false,
},
`example.com and other.com pool should reject bad.com token`: {
Pool: IssuerPool{bobIfExampleCom, aliceIfOtherCom},
Token: badToken,
WantErr: true,
},
`example.com and other.com pool should reject badly formatted token`: {
Pool: IssuerPool{bobIfExampleCom, aliceIfOtherCom},
Token: badFormatToken,
WantErr: true,
},
`empty pool should never authenticate`: {
Pool: IssuerPool{},
Token: exampleToken,
WantErr: true,
},
`match then reject all pool should never authenticate`: {
Pool: IssuerPool{matchThenRejectAll},
Token: exampleToken,
WantErr: true,
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
ctx := context.Background()
principal, err := test.Pool.Authenticate(ctx, test.Token)
if err != nil {
if !test.WantErr {
t.Error("Didn't expect error", err)
}
} else {
if principal != test.ExpectedPrincipal {
t.Errorf("Got principal %s, but wanted %s", principal.Name(ctx), test.ExpectedPrincipal.Name(ctx))
}
}
})
}
}
func TestExtractIssuerURL(t *testing.T) {
tests := map[string]struct {
Token string
ExpectedURL string
WantErr bool
}{
`issuer example.com`: {
// Valid token (HS256 with `derp` secret) and iss = example.com
Token: `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJleGFtcGxlLmNvbSJ9.LGkuVtRymNgdZFn4v_jRJCJVwdt1wZDw588tbXC8VTU`,
ExpectedURL: `example.com`,
WantErr: false,
},
`no issuer claim`: {
// Valid JWT but no `iss` claim. Claims are {"foo": "bar"}.
Token: `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIifQ.kOu-Qu-GoCH3G70LKrm_W9DJj2MpF4C5QweznLgGZgc`,
WantErr: true,
},
`Not enough token parts`: {
// Has 2 parts instead of 3
Token: `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIifQ`,
WantErr: true,
},
`Too many token parts`: {
// Has 4 parts instead of 3
Token: `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIifQ.eyJmb28iOiJiYXIifQ.eyJmb28iOiJiYXIifQ`,
WantErr: true,
},
`Bad claims base64 encoding`: {
// ??? are illegal base64 url safe characters
Token: `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.???.kOu-Qu-GoCH3G70LKrm_W9DJj2MpF4C5QweznLgGZgc`,
WantErr: true,
},
`Bad claims JSON format`: {
// fXs decodes to `}{` which is note valid JSON
Token: `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.fXs.kOu-Qu-GoCH3G70LKrm_W9DJj2MpF4C5QweznLgGZgc`,
WantErr: true,
},
}
for name, test := range tests {
t.Run(name, func(t *testing.T) {
gotURL, err := extractIssuerURL(test.Token)
if err != nil {
if !test.WantErr {
t.Error(err)
}
} else {
if gotURL != test.ExpectedURL {
t.Errorf("Wanted %s and got %s for issuer url", test.ExpectedURL, gotURL)
}
}
})
}
}
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