{"id":972,"date":"2023-06-25T08:41:05","date_gmt":"2023-06-25T00:41:05","guid":{"rendered":"https:\/\/www.fanyamin.com\/wordpress\/?p=972"},"modified":"2023-06-25T08:41:05","modified_gmt":"2023-06-25T00:41:05","slug":"openssl-adapter-in-webrtc","status":"publish","type":"post","link":"https:\/\/www.fanyamin.com\/wordpress\/?p=972","title":{"rendered":"openssl adapter in WebRTC"},"content":{"rendered":"

Overview<\/h1>\n

DTLS Flow<\/h1>\n
   Client                                          Server\n   ------                                          ------\n\n   ClientHello             -------->                           Flight 1\n\n                           <-------    HelloVerifyRequest      Flight 2\n\n   ClientHello             -------->                           Flight 3\n\n                                              ServerHello    \\\n                                             Certificate*     \\\n                                       ServerKeyExchange*      Flight 4\n                                      CertificateRequest*     \/\n                           <--------      ServerHelloDone    \/\n\n   Certificate*                                              \\\n   ClientKeyExchange                                          \\\n   CertificateVerify*                                          Flight 5\n   [ChangeCipherSpec]                                         \/\n   Finished                -------->                         \/\n\n                                       [ChangeCipherSpec]    \\ Flight 6\n                           <--------             Finished    \/\n<\/code><\/pre>\n
TLS  with session ticket<\/h1>\n
         Client                                               Server\n\n         ClientHello\n         (SessionTicket extension) -------->\n                                                         ServerHello\n                                     (empty SessionTicket extension)\n                                                        Certificate*\n                                                  ServerKeyExchange*\n                                                 CertificateRequest*\n                                  <--------          ServerHelloDone\n         Certificate*\n         ClientKeyExchange\n         CertificateVerify*\n         [ChangeCipherSpec]\n         Finished                 -------->\n                                                    NewSessionTicket\n                                                  [ChangeCipherSpec]\n                                  <--------                 Finished\n         Application Data         <------->         Application Data<\/code><\/pre>\n
WebRTC log<\/h1>\n
[38367:49923:0619\/142032.886764:VERBOSE1:p2p_transport_channel.cc(2261)] Channel[0|1|__]: Changed writable_ to 1\n[38367:49923:0619\/142032.886786:VERBOSE1:dtls_transport.cc(532)] DtlsTransport[0|1|__]: ice_transport writable state changed to 1\n[38367:49923:0619\/142032.886806:INFO:dtls_transport.cc(859)] DtlsTransport[0|1|__]: configuring DTLS handshake timeout 54 based on ICE RTT 27\n[38367:49923:0619\/142032.886990:INFO:openssl_adapter.cc(833)] handshake_start TLS client start_connect\n[38367:49923:0619\/142032.887068:INFO:openssl_adapter.cc(833)] connect_loop TLS client enter_early_data\n[38367:49923:0619\/142032.887117:INFO:openssl_adapter.cc(833)] connect_loop TLS client read_hello_verify_request\n[38367:49923:0619\/142032.887154:INFO:openssl_adapter.cc(833)] connect_exit TLS client read_hello_verify_request\n[38367:49923:0619\/142032.887183:INFO:dtls_transport.cc(761)] DtlsTransport[0|1|__]: DtlsTransport: Started DTLS handshake active=1\n[38367:49923:0619\/142032.887208:VERBOSE1:dtls_transport.cc(840)] DtlsTransport[0|1|__]: set_dtls_state from:0 to 1\n[38367:49923:0619\/142032.887236:INFO:srtp_transport.cc(360)] The params in SRTP transport are reset.\n[38367:49923:0619\/142032.887266:VERBOSE1:dtls_transport.cc(575)] DtlsTransport[0|1|__]: ice_transport receiving state changed to 1\n[38367:49923:0619\/142032.887290:INFO:p2p_transport_channel.cc(1902)] Channel[0|1|RW]: Transport channel state changed from 1 to 2\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
Overview DTLS Flow Client Server —— —— ClientHello ——–> Flight 1 <——- HelloVerifyRequest Flight 2 ClientHello ——–> Flight 3 ServerHello \\ Certificate* \\ ServerKeyExchange* Flight 4 CertificateRequest* \/ <——– ServerHelloDone \/ Certificate* \\ ClientKeyExchange \\ CertificateVerify* Flight 5 [ChangeCipherSpec] \/ Finished ——–> \/ [ChangeCipherSpec] \\ Flight 6 <——– Finished \/ TLS with session ticket Client […] →Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-972","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/972"}],"collection":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=972"}],"version-history":[{"count":1,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/972\/revisions"}],"predecessor-version":[{"id":973,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/972\/revisions\/973"}],"wp:attachment":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}