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WiFiServerSecure: Cache SSL sessions (#7774)

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* WiFiServerSecure: Cache the SSL sessions

* Add SSL session caching to HTTPS server examples

* Document server SSL session caching

* Fix an incomplete sentence in the documentation

* Document BearSSL::Session

* Use the number of sessions instead of the buffer size in ServerSessions' constructors
This commit is contained in:
Zakary Kamal Ismail
2020-12-22 00:13:43 -05:00
committed by GitHub
parent 8add1fd2d9
commit 032db6fc81
10 changed files with 146 additions and 19 deletions
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20
libraries/ESP8266WiFi/examples/BearSSL_Server/BearSSL_Server.ino
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@ -138,6 +138,21 @@ GBEnkz4KpKv7TkHoW+j7F5EMcLcSrUIpyw==
#endif
#define CACHE_SIZE 5 // Number of sessions to cache.
#define USE_CACHE // Enable SSL session caching.
// Caching SSL sessions shortens the length of the SSL handshake.
// You can see the performance improvement by looking at the
// Network tab of the developper tools of your browser.
//#define DYNAMIC_CACHE // Whether to dynamically allocate the cache.
#if defined(USE_CACHE) && defined(DYNAMIC_CACHE)
// Dynamically allocated cache.
BearSSL::ServerSessions serverCache(CACHE_SIZE);
#elif defined(USE_CACHE)
// Statically allocated cache.
ServerSession store[CACHE_SIZE];
BearSSL::ServerSessions serverCache(store, CACHE_SIZE);
#endif
void setup() {
Serial.begin(115200);
@ -169,6 +184,11 @@ void setup() {
server.setECCert(serverCertList, BR_KEYTYPE_KEYX|BR_KEYTYPE_SIGN, serverPrivKey);
#endif
// Set the server's cache
#if defined(USE_CACHE)
server.setCache(&serverCache);
#endif
// Actually start accepting connections
server.begin();
}