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// Copyright 2024 OpenPubkey
//
// 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.
//
// SPDX-License-Identifier: Apache-2.0
package mocks
import (
"context"
"crypto"
"fmt"
"testing"
"github.com/lestrrat-go/jwx/v2/jwa"
"github.com/lestrrat-go/jwx/v2/jwk"
"github.com/openpubkey/openpubkey/pktoken"
"github.com/openpubkey/openpubkey/pktoken/clientinstance"
"github.com/openpubkey/openpubkey/providers"
"github.com/openpubkey/openpubkey/providers/mocks"
"github.com/openpubkey/openpubkey/util"
"github.com/stretchr/testify/require"
)
func GenerateMockPKToken(t *testing.T, signingKey crypto.Signer, alg jwa.KeyAlgorithm) (*pktoken.PKToken, error) {
options := &MockPKTokenOpts{
GQSign: false,
CommitType: providers.CommitTypesEnum.NONCE_CLAIM,
CorrectCicHash: true,
CorrectCicSig: true,
}
pkt, _, err := GenerateMockPKTokenWithOpts(t, signingKey, alg, mocks.DefaultIDTokenTemplate(), options)
return pkt, err
}
func GenerateMockPKTokenGQ(t *testing.T, signingKey crypto.Signer, alg jwa.KeyAlgorithm) (*pktoken.PKToken, error) {
options := &MockPKTokenOpts{
GQSign: true,
CommitType: providers.CommitTypesEnum.NONCE_CLAIM,
CorrectCicHash: true,
CorrectCicSig: true,
}
pkt, _, err := GenerateMockPKTokenWithOpts(t, signingKey, alg, mocks.DefaultIDTokenTemplate(), options)
return pkt, err
}
type MockPKTokenOpts struct {
GQSign bool
CommitType providers.CommitType
GQOnly bool
CorrectCicHash bool
CorrectCicSig bool
}
func GenerateMockPKTokenWithOpts(t *testing.T, signingKey crypto.Signer, alg jwa.KeyAlgorithm,
idtTemplate mocks.IDTokenTemplate, options *MockPKTokenOpts) (*pktoken.PKToken, *mocks.MockProviderBackend, error) {
jwkKey, err := jwk.PublicKeyOf(signingKey)
if err != nil {
return nil, nil, err
}
err = jwkKey.Set(jwk.AlgorithmKey, alg)
if err != nil {
return nil, nil, err
}
cic, err := clientinstance.NewClaims(jwkKey, map[string]any{})
require.NoError(t, err)
// Set gqOnly to gqCommitment since gqCommitment requires gqOnly
gqOnly := options.CommitType.GQCommitment
providerOpts := providers.MockProviderOpts{
GQSign: options.GQSign,
CommitType: options.CommitType,
NumKeys: 2,
VerifierOpts: providers.ProviderVerifierOpts{
SkipClientIDCheck: false,
GQOnly: gqOnly,
CommitType: options.CommitType,
ClientID: "mockClient-ID",
},
}
op, backend, _, err := providers.NewMockProvider(providerOpts)
require.NoError(t, err)
opSignKey, keyID, _ := backend.RandomSigningKey()
idtTemplate.KeyID = keyID
idtTemplate.SigningKey = opSignKey
switch options.CommitType {
case providers.CommitTypesEnum.NONCE_CLAIM:
idtTemplate.CommitFunc = mocks.AddNonceCommit
case providers.CommitTypesEnum.AUD_CLAIM:
idtTemplate.CommitFunc = mocks.AddAudCommit
case providers.CommitTypesEnum.GQ_BOUND:
default:
return nil, nil, fmt.Errorf("unknown CommitType: %v", options.CommitType)
}
backend.SetIDTokenTemplate(&idtTemplate)
tokens, err := op.RequestTokens(context.Background(), cic)
if err != nil {
return nil, nil, err
}
idToken := tokens.IDToken
// Return a PK Token where the CIC which doesn't match the commitment
if !options.CorrectCicHash {
// overwrite the cic with a new cic with a different hash
cic, err = clientinstance.NewClaims(jwkKey, map[string]any{"cause": "differentCicHash"})
if err != nil {
return nil, nil, err
}
}
// Return a PK Token where the CIC that is signed by the wrong key
if !options.CorrectCicSig {
// overwrite the signkey with a new key
signingKey, err = util.GenKeyPair(alg)
require.NoError(t, err)
jwkKey, err = jwk.PublicKeyOf(signingKey)
if err != nil {
return nil, nil, err
}
err = jwkKey.Set(jwk.AlgorithmKey, alg)
if err != nil {
return nil, nil, err
}
}
// Sign mock id token payload with cic headers
cicToken, err := cic.Sign(signingKey, jwkKey.Algorithm(), idToken)
if err != nil {
return nil, nil, err
}
// Combine two tokens into a PK Token
pkt, err := pktoken.New(idToken, cicToken)
if err != nil {
return nil, nil, err
}
return pkt, backend, nil
}
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