1 /*
2  * Copyright 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.credentials.webauthn
18 
19 import android.util.Log
20 import androidx.annotation.RestrictTo
21 import org.json.JSONObject
22 
23 @RestrictTo(RestrictTo.Scope.LIBRARY)
24 class PublicKeyCredentialCreationOptions(requestJson: String) {
25     val json: JSONObject
26 
27     val rp: PublicKeyCredentialRpEntity
28     val user: PublicKeyCredentialUserEntity
29     val challenge: ByteArray
30     val pubKeyCredParams: List<PublicKeyCredentialParameters>
31 
32     var timeout: Long
33     var excludeCredentials: List<PublicKeyCredentialDescriptor>
34     var authenticatorSelection: AuthenticatorSelectionCriteria
35     var attestation: String
36 
37     init {
38         json = JSONObject(requestJson)
39         val challengeString = json.getString("challenge")
40         challenge = WebAuthnUtils.b64Decode(challengeString)
41         val rpJson = json.getJSONObject("rp")
42         rp = PublicKeyCredentialRpEntity(rpJson.getString("name"), rpJson.getString("id"))
43         val rpUser = json.getJSONObject("user")
44         val userId = WebAuthnUtils.b64Decode(rpUser.getString("id"))
45         user =
46             PublicKeyCredentialUserEntity(
47                 rpUser.getString("name"),
48                 userId,
49                 rpUser.getString("displayName")
50             )
51         val pubKeyCredParamsJson = json.getJSONArray("pubKeyCredParams")
52         val pubKeyCredParamsTmp: MutableList<PublicKeyCredentialParameters> = mutableListOf()
53         for (i in 0 until pubKeyCredParamsJson.length()) {
54             val e = pubKeyCredParamsJson.getJSONObject(i)
55             pubKeyCredParamsTmp.add(
56                 PublicKeyCredentialParameters(e.getString("type"), e.getLong("alg"))
57             )
58         }
59         pubKeyCredParams = pubKeyCredParamsTmp.toList()
60 
61         timeout = json.optLong("timeout", 0)
62         // TODO: Fix excludeCredentials and authenticatorSelection
63         excludeCredentials = emptyList()
64         authenticatorSelection = AuthenticatorSelectionCriteria("platform", "required")
65         attestation = json.optString("attestation", "none")
66 
67         Log.i("WebAuthn", "Challenge $challenge()")
68         Log.i("WebAuthn", "rp $rp")
69         Log.i("WebAuthn", "user $user")
70         Log.i("WebAuthn", "pubKeyCredParams $pubKeyCredParams")
71         Log.i("WebAuthn", "timeout $timeout")
72         Log.i("WebAuthn", "excludeCredentials $excludeCredentials")
73         Log.i("WebAuthn", "authenticatorSelection $authenticatorSelection")
74         Log.i("WebAuthn", "attestation $attestation")
75     }
76 }
77