解决 javax.net.ssl.SSLHandshakeException: Chain validation failed

场景：

升级retrofit及启用https后出现报错。

解决方案：

ConnectionSpec spec = new ConnectionSpec.Builder(ConnectionSpec.COMPATIBLE_TLS)
                .tlsVersions(TlsVersion.TLS_1_2, TlsVersion.TLS_1_1, TlsVersion.TLS_1_0)
                .allEnabledCipherSuites()
                .build();//解决在Android5.0版本以下https无法访问
  ConnectionSpec spec1 = new ConnectionSpec.Builder(ConnectionSpec.CLEARTEXT).build();//兼容http接口
  httpClient.connectionSpecs(Arrays.asList(spec,spec1));

完整配置：

open fun setHttpClientBuilder(builder: OkHttpClient.Builder): OkHttpClient.Builder {
        val spec = ConnectionSpec.Builder(ConnectionSpec.COMPATIBLE_TLS)
            .tlsVersions(TlsVersion.TLS_1_2, TlsVersion.TLS_1_1, TlsVersion.TLS_1_0)
            .allEnabledCipherSuites()
            .build()
        val spec1 = ConnectionSpec.Builder(ConnectionSpec.CLEARTEXT).build()
        builder.apply {
            connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
            readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
            writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)

            sslSocketFactory(
                SSLSocketClient.getSSLSocketFactory(),
                SSLSocketClient.getTrustAllCert()
            )
            hostnameVerifier(SSLSocketClient.getHostnameVerifier())
            connectionSpecs(listOf(spec, spec1))
        }
        return builder
    }

SSLSocketClient.java

public class SSLSocketClient {
    public static X509TrustManager getTrustAllCert() {
        return trustAllCert;
    }

    private static X509TrustManager trustAllCert;
    //获取这个SSLSocketFactory
    public static SSLSocketFactory getSSLSocketFactory() {
        try {
            trustAllCert = new MyTrustManager();
            SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, new TrustManager[]{trustAllCert}, new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }



    //实现X509TrustManager接口
    public static class MyTrustManager implements X509TrustManager {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
        }

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[0];
        }
    }

//    //获取TrustManager
//    private static X509TrustManager getTrustManager() {
//        return new X509TrustManager() {
//            @Override
//            public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
//            }
//
//            @Override
//            public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
//            }
//
//            @Override
//            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
//                return new java.security.cert.X509Certificate[]{};
//            }
//        };
//    }


    //获取HostnameVerifier
    public static HostnameVerifier getHostnameVerifier() {
        return (s, sslSession) -> true;
    }
}

参考：

https://www.jianshu.com/p/64499bdf6842

https://www.jianshu.com/p/031d8aac0aba