fluxer/tests/integration/webauthn_helpers_test.go
2026-01-01 21:05:54 +00:00

79 lines
2.4 KiB
Go

/*
* Copyright (C) 2026 Fluxer Contributors
*
* This file is part of Fluxer.
*
* Fluxer is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Fluxer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
*/
package integration
import (
"bytes"
"crypto/ecdsa"
"crypto/rand"
"crypto/sha256"
"encoding/binary"
"testing"
)
// buildAuthenticationWithoutUV constructs an authentication response where the UV flag is not set.
func buildAuthenticationWithoutUV(t testing.TB, device *webAuthnDevice, options webAuthnAuthenticationOptions) map[string]any {
t.Helper()
challenge := decodeBase64URL(t, options.Challenge)
clientData := map[string]any{
"type": "webauthn.get",
"challenge": encodeBase64URL(challenge),
"origin": device.origin,
"crossOrigin": false,
}
clientDataJSON := mustJSON(t, clientData)
rpHash := sha256.Sum256([]byte(device.rpID))
flags := byte(0x01)
buf := &bytes.Buffer{}
buf.Write(rpHash[:])
buf.WriteByte(flags)
device.signCount++
if err := binary.Write(buf, binary.BigEndian, device.signCount); err != nil {
t.Fatalf("failed to write sign count: %v", err)
}
authData := buf.Bytes()
clientDataHash := sha256.Sum256(clientDataJSON)
sigInput := append(authData, clientDataHash[:]...)
digest := sha256.Sum256(sigInput)
signature, err := ecdsa.SignASN1(rand.Reader, device.privateKey, digest[:])
if err != nil {
t.Fatalf("failed to sign assertion: %v", err)
}
return map[string]any{
"id": encodeBase64URL(device.credentialID),
"rawId": encodeBase64URL(device.credentialID),
"type": "public-key",
"clientExtensionResults": map[string]any{},
"response": map[string]any{
"clientDataJSON": encodeBase64URL(clientDataJSON),
"authenticatorData": encodeBase64URL(authData),
"signature": encodeBase64URL(signature),
"userHandle": encodeBase64URL(device.userHandle),
},
}
}