Retrofit 2.2.0 Android API 24 javax.net.ssl.SSLHandshakeException: Handshake failed

android retrofit retrofit2 sslhandshakeexception
kekev76 picture kekev76 · Mar 23, 2017 · Viewed 11.3k times · Source

I'm using Retrofit 2.2.0 for uploading image to server (using Java). With an Android device (Samsung galaxy S6) API 24 (Build : NRD90M.G920FXXU5EQAC) when I try to post a request, this request failed with this error 

javax.net.ssl.SSLHandshakeException: Handshake failed

ps: I try to downgrade the Retrofit 2.1.0 and it works perfectly.

Answer

Daniil Yakovlev picture Daniil Yakovlev · Jun 8, 2017

The solution for me was adding more ciphers as acceptable for OkHttpClient. Since API 21, some TLS certificates are deprecated for Android. This might help:

ConnectionSpec spec = new 
ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
                .tlsVersions(TlsVersion.TLS_1_2)
                .cipherSuites(      
CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,                    
CipherSuite.TLS_DHE_RSA_WITH_AES_128_GCM_SHA256)
                .build();

OkHttpClient client = new OkHttpClient.Builder()
            .connectionSpecs(Collections.singletonList(spec))
            .build();

For more info please visit: https://github.com/square/okhttp/wiki/HTTPS

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