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我的 android 应用程序依赖 SNI 来访问正确的服务器，因此它需要 TLS 并且不能与 SSLv3 一起使用。我正在使用 okhttp 和改造，服务器日志表明 TLS 握手突然切换到 SSLv3，并且可能会保持这种方式一段时间，由于缺乏服务器名称指示支持，导致主机名验证重复失败。

我了解在某些情况下（哪些情况？）okhttp 停止使用 TLS 并切换到 SSL 作为后备。但是，在 SNI 的情况下这是不可接受的，有没有办法禁用回退？

示例 apache 日志：

[Wed May 07 18:00:12.799511 2014] [ssl:debug] [pid 20369:tid 140532403599104] ssl_engine_kernel.c(1891): [client <removed>:51431] AH02041: Protocol: TLSv1, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:00:28.563170 2014] [ssl:debug] [pid 20455:tid 140532646553344] ssl_engine_kernel.c(1891): [client <removed>:51432] AH02041: Protocol: TLSv1, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:00:45.884075 2014] [ssl:debug] [pid 20371:tid 140532445562624] ssl_engine_kernel.c(1891): [client <removed>:51433] AH02041: Protocol: TLSv1, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:01:01.322657 2014] [ssl:debug] [pid 20455:tid 140532395206400] ssl_engine_kernel.c(1891): [client <removed>:51434] AH02041: Protocol: TLSv1, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:01:18.361705 2014] [ssl:debug] [pid 20370:tid 140532462348032] ssl_engine_kernel.c(1891): [client <removed>:51435] AH02041: Protocol: TLSv1, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:01:25.378294 2014] [ssl:debug] [pid 20371:tid 140532487526144] ssl_engine_kernel.c(1891): [client <removed>:51436] AH02041: Protocol: SSLv3, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:01:40.807100 2014] [ssl:debug] [pid 20369:tid 140532445562624] ssl_engine_kernel.c(1891): [client <removed>:51437] AH02041: Protocol: SSLv3, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:01:41.154782 2014] [ssl:debug] [pid 20371:tid 140532479133440] ssl_engine_kernel.c(1891): [client <removed>:51438] AH02041: Protocol: SSLv3, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:01:56.695645 2014] [ssl:debug] [pid 20369:tid 140532504311552] ssl_engine_kernel.c(1891): [client <removed>:51439] AH02041: Protocol: SSLv3, Cipher: RC4-SHA (128/128 bits)
[Wed May 07 18:01:57.252515 2014] [ssl:debug] [pid 20455:tid 140532521096960] ssl_engine_kernel.c(1891): [client <removed>:51440] AH02041: Protocol: SSLv3, Cipher: RC4-SHA (128/128 bits)
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2 回答 2

5

感谢上述功能请求，这是作为配置选项添加的，请参阅此处了解更多信息。

如果您想拥有一个不回退到不安全密码套件的严格/安全客户端，请使用此 ConnectionSpec：

client.setConnectionSpecs(Collections.singletonList(ConnectionSpec.MODERN_TLS));

或者，您可以定义自己的 ConnectionSpec：

    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();  

    client.setConnectionSpecs(Collections.singletonList(spec));
于 2015-10-06T11:36:10.840 回答
3

打开一个功能请求，我们会处理它。

于 2014-05-09T04:57:24.113 回答