Implement for ssid a similar approach as for passphrase (#5411)

* Implement for ssid a similar approach as for passphrase

* Additional fixes for 32-char ssid

Author: devyte

libraries/ESP8266WiFi/src/ESP8266WiFi.cpp

@@ -72,13 +72,19 @@ void ESP8266WiFiClass::printDiag(Print& p) {
     struct station_config conf;
     wifi_station_get_config(&conf);
 
-    const char* ssid = reinterpret_cast<const char*>(conf.ssid);
+    char ssid[33]; //ssid can be up to 32chars, => plus null term
+    memcpy(ssid, conf.ssid, sizeof(conf.ssid));
+    ssid[32] = 0; //nullterm in case of 32 char ssid
+ 
     p.print("SSID (");
     p.print(strlen(ssid));
     p.print("): ");
     p.println(ssid);
 
-    const char* passphrase = reinterpret_cast<const char*>(conf.password);
+    char passphrase[65];
+    memcpy(passphrase, conf.password, sizeof(conf.password));
+    passphrase[64] = 0;
+
     p.print("Passphrase (");
     p.print(strlen(passphrase));
     p.print("): ");

libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp

@@ -187,7 +187,7 @@ bool ESP8266WiFiMulti::APlistAdd(const char* ssid, const char *passphrase) {
 
     WifiAPEntry newAP;
 
-    if(!ssid || *ssid == 0x00 || strlen(ssid) > 31) {
+    if(!ssid || *ssid == 0x00 || strlen(ssid) > 32) {
         // fail SSID too long or missing!
         DEBUG_WIFI_MULTI("[WIFI][APlistAdd] no ssid or ssid too long\n");
         return false;
@@ -230,7 +230,7 @@ bool ESP8266WiFiMulti::APlistAdd(const char* ssid, const char *passphrase) {
 }
 
 bool ESP8266WiFiMulti::APlistExists(const char* ssid, const char *passphrase) {
-    if(!ssid || *ssid == 0x00 || strlen(ssid) > 31) {
+    if(!ssid || *ssid == 0x00 || strlen(ssid) > 32) {
         // fail SSID too long or missing!
         DEBUG_WIFI_MULTI("[WIFI][APlistExists] no ssid or ssid too long\n");
         return false;

libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp

@@ -62,7 +62,7 @@ static bool sta_config_equal(const station_config& lhs, const station_config& rh
  * @return equal
  */
 static bool sta_config_equal(const station_config& lhs, const station_config& rhs) {
-    if(strcmp(reinterpret_cast<const char*>(lhs.ssid), reinterpret_cast<const char*>(rhs.ssid)) != 0) {
+    if(strncmp(reinterpret_cast<const char*>(lhs.ssid), reinterpret_cast<const char*>(rhs.ssid), sizeof(lhs.ssid)) != 0) {
         return false;
     }
 
@@ -108,7 +108,7 @@ wl_status_t ESP8266WiFiSTAClass::begin(const char* ssid, const char *passphrase,
         return WL_CONNECT_FAILED;
     }
 
-    if(!ssid || *ssid == 0x00 || strlen(ssid) > 31) {
+    if(!ssid || *ssid == 0x00 || strlen(ssid) > 32) {
         // fail SSID too long or missing!
         return WL_CONNECT_FAILED;
     }
@@ -119,10 +119,12 @@ wl_status_t ESP8266WiFiSTAClass::begin(const char* ssid, const char *passphrase,
     }
 
     struct station_config conf;
-    strcpy(reinterpret_cast<char*>(conf.ssid), ssid);
+    if(strlen(ssid) == 32)
+        memcpy(reinterpret_cast<char*>(conf.ssid), ssid, 32); //copied in without null term
+    else
+        strcpy(reinterpret_cast<char*>(conf.ssid), ssid);
 
     conf.threshold.authmode = AUTH_OPEN;
-
     if(passphrase) {
         conf.threshold.authmode = _useInsecureWEP ? AUTH_WEP : AUTH_WPA_PSK;
         if (strlen(passphrase) == 64) // it's not a passphrase, is the PSK, which is copied into conf.password without null term
@@ -524,7 +526,10 @@ wl_status_t ESP8266WiFiSTAClass::status() {
 String ESP8266WiFiSTAClass::SSID() const {
     struct station_config conf;
     wifi_station_get_config(&conf);
-    return String(reinterpret_cast<char*>(conf.ssid));
+    char tmp[33]; //ssid can be up to 32chars, => plus null term
+    memcpy(tmp, conf.ssid, sizeof(conf.ssid));
+    tmp[32] = 0; //nullterm in case of 32 char ssid
+    return String(reinterpret_cast<char*>(tmp));
 }
 
 /**

libraries/ESP8266WiFi/src/ESP8266WiFiScan.cpp

@@ -186,8 +186,11 @@ String ESP8266WiFiScanClass::SSID(uint8_t i) {
     if(!it) {
         return "";
     }
+    char tmp[33]; //ssid can be up to 32chars, => plus null term
+    memcpy(tmp, it->ssid, sizeof(it->ssid));
+    tmp[32] = 0; //nullterm in case of 32 char ssid
 
-    return String(reinterpret_cast<const char*>(it->ssid));
+    return String(reinterpret_cast<const char*>(tmp));
 }