TLS version returned in the response isn't matching with the ClientHello TLS Handshake version

[IndranilKhedkar]

We observed that though the TLS Handshake Version after decoding ClientHello request is 771, the GinHandlerFunc is returning TLS Version as 772 from the connectionState object.

Sample Response:

{"akamai_fp":"|0|0|","cookies":"","http2":{"InitialSetting":null,"ConnFlow":0,"OrderHeaders":null,"Priority":{"StreamDep":0,"Exclusive":false,"Weight":0}},"ja3":"772,49195-49199-49196-49200-52393-52392-49161-49171-49162-49172-156-157-47-53-49170-10-4865-4866-4867,0-5-10-11-13-65281-23-18-43-51,29-23-24-25,0","ja3n":"772,49195-49199-49196-49200-52393-52392-49161-49171-49162-49172-156-157-47-53-49170-10-4865-4866-4867,,29-23-24-25,0","ja4":"t13d191000_702199bc00d8_976ee909108b","ja4h":"ge11nn000000_cd680697de12_e3b0c44298fc_e3b0c44298fc","negotiatedProtocol":"","orderHeaders":["Host","User-Agent","Accept-Encoding"],"tls":{"Ciphers":[49195,49199,49196,49200,52393,52392,49161,49171,49162,49172,156,157,47,53,49170,10,4865,4866,4867],"Curves":[29,23,24,25],"Extensions":[0,5,10,11,13,65281,23,18,43,51],"Points":[0],"Protocols":null,"Versions":[772,771],"Algorithms":[2052,1027,2055,2053,2054,1025,1281,1537,1283,1539,513,515],"RandomTime":"2084-10-20 08:38:46 +0530 IST","RandomBytes":"53b984dac62e86e542624b080e72290eb29b15475f8dd9e7b9bc1a9f","SessionId":"972bc5baec285ecd2806aeaabf43390425f32f11b28cc08481ef72d973713a77","CompressionMethods":"00"},"tlsVersion":772,"userAgent":"Go-http-client/1.1"}

[gospider007]

ClientHello 请求后的 TLS 握手版本 并不能反应客户端支持哪一个 tls 版本，所以我用connectionState对象返回 TLS 版本 来判断客户端真实支持的tls 版本