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Can't make it work on Android #8

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Can't make it work on Android#8
@RobbWatershed

Description

@RobbWatershed
RobbWatershed
opened on Feb 8, 2026

I'm trying to use the library to work with OkHttp but I can't make it work at all...

Environment : Android (API 30)

Scenario 1 : Using both impersonator's OkHttp and bctls modules

Code

val api = ImpersonatorFactory.macChrome()
val factory = OkHttpClientFactory.create(api)
return factory.newHttpClient()

Result

java.lang.NoClassDefFoundError: okhttp3.internal.platform.Platform
	at okhttp3.internal.tls.CertificateChainCleaner$Companion.get(CertificateChainCleaner.kt:42)
	at okhttp3.OkHttpClient$Builder.sslSocketFactory(OkHttpClient.kt:811)
	at okhttp3.DefaultHttpClientFactory.newHttpClientInternal(DefaultHttpClientFactory.java:64)
	at okhttp3.DefaultHttpClientFactory.newHttpClient(DefaultHttpClientFactory.java:55)
	at okhttp3.DefaultHttpClientFactory.newHttpClient(DefaultHttpClientFactory.java:48)
	at okhttp3.DefaultHttpClientFactory.newHttpClient(DefaultHttpClientFactory.java:36)
	at ...
Caused by: java.lang.ExceptionInInitializerError
	at okhttp3.OkHttpClient.<init>(OkHttpClient.kt:237)
	at okhttp3.OkHttpClient.<init>(OkHttpClient.kt:222)
	at coil3.network.okhttp.OkHttpNetworkFetcher.OkHttpNetworkFetcherFactory$lambda$0(OkHttpNetworkFetcher.kt:16)
	at coil3.network.okhttp.OkHttpNetworkFetcher$$ExternalSyntheticLambda2.invoke(D8$$SyntheticClass:0)
	at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:86)
	at coil3.network.NetworkFetcher.executeNetworkRequest(NetworkFetcher.kt:201)
	at coil3.network.NetworkFetcher.fetch(NetworkFetcher.kt:74)
	at coil3.intercept.EngineInterceptor.fetch(EngineInterceptor.kt:169)
	at coil3.intercept.EngineInterceptor.execute(EngineInterceptor.kt:126)
	at coil3.intercept.EngineInterceptor.access$execute(EngineInterceptor.kt:43)
	at coil3.intercept.EngineInterceptor$intercept$2.invokeSuspend(EngineInterceptor.kt:77)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:124)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:586)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:820)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:717)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:704)
Caused by: java.lang.UnsupportedOperationException: Android platform does not support okhttp3.internal.platform.Platform
	at okhttp3.internal.platform.Platform$Companion.findPlatform(Platform.kt:219)
	at okhttp3.internal.platform.Platform$Companion.access$findPlatform(Platform.kt:176)
	at okhttp3.internal.platform.Platform.<clinit>(Platform.kt:177)
	at okhttp3.OkHttpClient.<init>(OkHttpClient.kt:237) 
	at okhttp3.OkHttpClient.<init>(OkHttpClient.kt:222) 
	at coil3.network.okhttp.OkHttpNetworkFetcher.OkHttpNetworkFetcherFactory$lambda$0(OkHttpNetworkFetcher.kt:16) 
	at coil3.network.okhttp.OkHttpNetworkFetcher$$ExternalSyntheticLambda2.invoke(D8$$SyntheticClass:0) 
	at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:86) 
	at coil3.network.NetworkFetcher.executeNetworkRequest(NetworkFetcher.kt:201) 
	at coil3.network.NetworkFetcher.fetch(NetworkFetcher.kt:74) 
	at coil3.intercept.EngineInterceptor.fetch(EngineInterceptor.kt:169) 
	at coil3.intercept.EngineInterceptor.execute(EngineInterceptor.kt:126) 
	at coil3.intercept.EngineInterceptor.access$execute(EngineInterceptor.kt:43) 
	at coil3.intercept.EngineInterceptor$intercept$2.invokeSuspend(EngineInterceptor.kt:77) 
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34) 
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100) 
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:124) 
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89) 
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:586) 
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:820) 
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:717) 
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:704) 

NB : It seems Android rejection is hardcoded inside your version of okhttp3.internal.platform.Platform$Companion.findPlatform

Scenario 2 : Using impersonator bctls module only + vanilla OkHttp 4.12.0

Code

val trustManagerFactory = TrustManagerFactory.getInstance(
	TrustManagerFactory.getDefaultAlgorithm()
)
trustManagerFactory.init(null as KeyStore?)
val trustManagers: Array<TrustManager> = trustManagerFactory.trustManagers
if (trustManagers.size != 1 || trustManagers[0] !is X509TrustManager) {
	throw IllegalStateException("Unexpected default trust managers:" + trustManagers.contentToString());
}
val trustManager = trustManagers[0] as X509TrustManager

val api = ImpersonatorFactory.macChrome()
val sslContext = api.newSSLContext(null, null)

return OkHttpClient.Builder()
	.sslSocketFactory(sslContext.socketFactory, trustManager)
	.build()

Result A (using ImpersonatorFactory.macChrome() and ImpersonatorFactory.ios())

2026-02-08 20:05:24.687 26110-26261 CustomWebViewClient     me.devsaki.hentoid.debug             E  org.bouncycastle.tls.TlsFatalAlert: internal_error(80)
at org.bouncycastle.jsse.provider.ImpersonateTlsClientProtocol.updateKeyShareToClientHello(ImpersonateTlsClientProtocol.java:72)
at org.bouncycastle.jsse.provider.ImpersonateProvTlsClientProtocol.sendClientHelloMessage(ImpersonateProvTlsClientProtocol.java:41)
at org.bouncycastle.tls.TlsClientProtocol.sendClientHello(TlsClientProtocol.java:1966)
at org.bouncycastle.tls.TlsClientProtocol.beginHandshake(TlsClientProtocol.java:106)
at org.bouncycastle.tls.TlsClientProtocol.connect(TlsClientProtocol.java:84)
at org.bouncycastle.jsse.provider.ProvSSLSocketWrap.startHandshake(ProvSSLSocketWrap.java:610)
at org.bouncycastle.jsse.provider.ProvSSLSocketWrap.startHandshake(ProvSSLSocketWrap.java:586)
at okhttp3.internal.connection.RealConnection.connectTls(RealConnection.kt:379)
at okhttp3.internal.connection.RealConnection.establishProtocol(RealConnection.kt:337)
at okhttp3.internal.connection.RealConnection.connect(RealConnection.kt:209)
at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.kt:226)
at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.kt:106)
at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.kt:74)
at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:255)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:95)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:83)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:76)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:201)
at okhttp3.internal.connection.RealCall.execute(RealCall.kt:154)
at me.devsaki.hentoid.util.network.HttpHelperKt.getOnlineResourceFast(HttpHelper.kt:163)
at me.devsaki.hentoid.activities.sources.CustomWebViewClient.parseResponse(CustomWebViewClient.kt:674)
at me.devsaki.hentoid.activities.sources.CustomWebViewClient.shouldInterceptRequestInternal(CustomWebViewClient.kt:565)
at me.devsaki.hentoid.activities.sources.CustomWebViewClient.shouldInterceptRequest(CustomWebViewClient.kt:506)
at WV.ng.a(chromium-SystemWebViewGoogle6432.aab-dev-766800003:101)
at org.chromium.android_webview.ShouldInterceptRequestMediator.shouldInterceptRequestFromNative(chromium-SystemWebViewGoogle6432.aab-dev-766800003:18)
Suppressed: org.bouncycastle.tls.TlsFatalAlert: internal_error(80)

Result B (using ImpersonatorFactory.macFirefox())

2026-02-08 20:07:30.654 27417-27570 CustomWebViewClient     me.devsaki.hentoid.debug             E  org.bouncycastle.tls.TlsFatalAlert: illegal_parameter(47); invalid key_share selected
at org.bouncycastle.tls.TlsClientProtocol.process13HelloRetryRequest(TlsClientProtocol.java:926)
at org.bouncycastle.tls.TlsClientProtocol.handleHandshakeMessage(TlsClientProtocol.java:485)
at org.bouncycastle.tls.TlsProtocol.processHandshakeQueue(TlsProtocol.java:709)
at org.bouncycastle.tls.TlsProtocol.processRecord(TlsProtocol.java:585)
at org.bouncycastle.tls.RecordStream.readRecord(RecordStream.java:247)
at org.bouncycastle.tls.TlsProtocol.safeReadRecord(TlsProtocol.java:864)
at org.bouncycastle.tls.TlsProtocol.blockForHandshake(TlsProtocol.java:421)
at org.bouncycastle.tls.TlsClientProtocol.connect(TlsClientProtocol.java:88)
at org.bouncycastle.jsse.provider.ProvSSLSocketWrap.startHandshake(ProvSSLSocketWrap.java:610)
at org.bouncycastle.jsse.provider.ProvSSLSocketWrap.startHandshake(ProvSSLSocketWrap.java:586)
at okhttp3.internal.connection.RealConnection.connectTls(RealConnection.kt:379)
at okhttp3.internal.connection.RealConnection.establishProtocol(RealConnection.kt:337)
at okhttp3.internal.connection.RealConnection.connect(RealConnection.kt:209)
at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.kt:226)
at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.kt:106)
at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.kt:74)
at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:255)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:95)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:83)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:76)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:201)
at okhttp3.internal.connection.RealCall.execute(RealCall.kt:154)
at me.devsaki.hentoid.util.network.HttpHelperKt.getOnlineResourceFast(HttpHelper.kt:163)
at me.devsaki.hentoid.activities.sources.CustomWebViewClient.parseResponse(CustomWebViewClient.kt:674)
at me.devsaki.hentoid.activities.sources.CustomWebViewClient.shouldInterceptRequestInternal(CustomWebViewClient.kt:565)
at me.devsaki.hentoid.activities.sources.CustomWebViewClient.shouldInterceptRequest(CustomWebViewClient.kt:506)
at WV.ng.a(chromium-SystemWebViewGoogle6432.aab-dev-766800003:101)
at org.chromium.android_webview.ShouldInterceptRequestMediator.shouldInterceptRequestFromNative(chromium-SystemWebViewGoogle6432.aab-dev-766800003:18)
Suppressed: org.bouncycastle.tls.TlsFatalAlert: illegal_parameter(47); invalid key_share selected

Is there anything I'm doing wrong?

Should I add extra parameters or settings somewhere?

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