GetPublicKeyCredentialOptionPrivileged.kt
/*
* Copyright 2022 The Android Open Source Project
*
* 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 androidx.credentials
import android.os.Bundle
import androidx.annotation.VisibleForTesting
import androidx.credentials.internal.FrameworkClassParsingException
/**
* A privileged request to get passkeys from the user's public key credential provider. The caller
* can modify the RP. Only callers with privileged permission (e.g. user's public browser or caBLE)
* can use this. These permissions will be introduced in an upcoming release.
* TODO("Add specific permission info/annotation")
*
* @property requestJson the privileged request in JSON format in the standard webauthn web json
* shown [here](https://w3c.github.io/webauthn/#dictdef-publickeycredentialrequestoptionsjson).
* @property allowHybrid defines whether hybrid credentials are allowed to fulfill this request,
* true by default, with hybrid credentials defined
* [here](https://w3c.github.io/webauthn/#dom-authenticatortransport-hybrid)
* @property relyingParty the expected true RP ID which will override the one in the [requestJson],
* where relyingParty is defined [here](https://w3c.github.io/webauthn/#rp-id) in more detail
* @property clientDataHash a hash that is used to verify the [relyingParty] Identity
* @throws NullPointerException If any of [requestJson], [relyingParty], or [clientDataHash]
* is null
* @throws IllegalArgumentException If any of [requestJson], [relyingParty], or [clientDataHash] is empty
*/
class GetPublicKeyCredentialOptionPrivileged @JvmOverloads constructor(
val requestJson: String,
val relyingParty: String,
val clientDataHash: String,
@get:JvmName("allowHybrid")
val allowHybrid: Boolean = true
) : GetCredentialOption(
type = PublicKeyCredential.TYPE_PUBLIC_KEY_CREDENTIAL,
requestData = toBundle(requestJson, relyingParty, clientDataHash, allowHybrid),
candidateQueryData = toBundle(requestJson, relyingParty, clientDataHash, allowHybrid),
requireSystemProvider = false,
) {
init {
require(requestJson.isNotEmpty()) { "requestJson must not be empty" }
require(relyingParty.isNotEmpty()) { "rp must not be empty" }
require(clientDataHash.isNotEmpty()) { "clientDataHash must not be empty" }
}
/** A builder for [GetPublicKeyCredentialOptionPrivileged]. */
class Builder(
private var requestJson: String,
private var relyingParty: String,
private var clientDataHash: String
) {
private var allowHybrid: Boolean = true
/**
* Sets the privileged request in JSON format.
*/
fun setRequestJson(requestJson: String): Builder {
this.requestJson = requestJson
return this
}
/**
* Sets whether hybrid credentials are allowed to fulfill this request, true by default.
*/
@Suppress("MissingGetterMatchingBuilder")
fun setAllowHybrid(allowHybrid: Boolean): Builder {
this.allowHybrid = allowHybrid
return this
}
/**
* Sets the expected true RP ID which will override the one in the [requestJson].
*/
fun setRelyingParty(relyingParty: String): Builder {
this.relyingParty = relyingParty
return this
}
/**
* Sets a hash that is used to verify the [relyingParty] Identity.
*/
fun setClientDataHash(clientDataHash: String): Builder {
this.clientDataHash = clientDataHash
return this
}
/** Builds a [GetPublicKeyCredentialOptionPrivileged]. */
fun build(): GetPublicKeyCredentialOptionPrivileged {
return GetPublicKeyCredentialOptionPrivileged(this.requestJson,
this.relyingParty, this.clientDataHash, this.allowHybrid)
}
}
/** @hide */
companion object {
@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
const val BUNDLE_KEY_RELYING_PARTY = "androidx.credentials.BUNDLE_KEY_RELYING_PARTY"
@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
const val BUNDLE_KEY_CLIENT_DATA_HASH =
"androidx.credentials.BUNDLE_KEY_CLIENT_DATA_HASH"
@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
const val BUNDLE_KEY_ALLOW_HYBRID = "androidx.credentials.BUNDLE_KEY_ALLOW_HYBRID"
@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
const val BUNDLE_KEY_REQUEST_JSON = "androidx.credentials.BUNDLE_KEY_REQUEST_JSON"
@VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE)
const val BUNDLE_VALUE_SUBTYPE_GET_PUBLIC_KEY_CREDENTIAL_OPTION_PRIVILEGED =
"androidx.credentials.BUNDLE_VALUE_SUBTYPE_GET_PUBLIC_KEY_CREDENTIAL_OPTION" +
"_PRIVILEGED"
@JvmStatic
internal fun toBundle(
requestJson: String,
relyingParty: String,
clientDataHash: String,
allowHybrid: Boolean
): Bundle {
val bundle = Bundle()
bundle.putString(
PublicKeyCredential.BUNDLE_KEY_SUBTYPE,
BUNDLE_VALUE_SUBTYPE_GET_PUBLIC_KEY_CREDENTIAL_OPTION_PRIVILEGED
)
bundle.putString(BUNDLE_KEY_REQUEST_JSON, requestJson)
bundle.putString(BUNDLE_KEY_RELYING_PARTY, relyingParty)
bundle.putString(BUNDLE_KEY_CLIENT_DATA_HASH, clientDataHash)
bundle.putBoolean(BUNDLE_KEY_ALLOW_HYBRID, allowHybrid)
return bundle
}
@Suppress("deprecation") // bundle.get() used for boolean value to prevent default
// boolean value from being returned.
@JvmStatic
internal fun createFrom(data: Bundle): GetPublicKeyCredentialOptionPrivileged {
try {
val requestJson = data.getString(BUNDLE_KEY_REQUEST_JSON)
val rp = data.getString(BUNDLE_KEY_RELYING_PARTY)
val clientDataHash = data.getString(BUNDLE_KEY_CLIENT_DATA_HASH)
val allowHybrid = data.get(BUNDLE_KEY_ALLOW_HYBRID)
return GetPublicKeyCredentialOptionPrivileged(
requestJson!!,
rp!!,
clientDataHash!!,
(allowHybrid!!) as Boolean,
)
} catch (e: Exception) {
throw FrameworkClassParsingException()
}
}
}
}