Merge pull request #7080 from symless/SYNERGY-1057-Client-can-not-read-trusted-fingerprints

SYNERGY-1057 Add trace if the system can't open file with trusted fingerprints

ChangeLog

@@ -4,6 +4,7 @@ Bug fixes:
 - #7070 Fix radio button shifted focus on macOS
 - #7078 Fix clipboard re-enables automatically
 - #7077 Fix Ubuntu, CentOS and Debian build after SYNERGY-1161
+- #7080 Add trace if the system can't open file with trusted fingerprints
 
 Enhancements:
 - #7068 Add Synergy restart when settings changed

src/lib/net/SecureSocket.cpp

@@ -709,15 +709,18 @@ SecureSocket::verifyCertFingerprint()
     file.open(trustedServersFilename.c_str());
 
     bool isValid = false;
-    while (!file.eof() && file.is_open()) {
-        getline(file,fileLine);
-        if (!fileLine.empty()) {
-            if (fileLine.compare(fingerprint) == 0) {
+    if (file.is_open()) {
+        while (!file.eof()) {
+            getline(file,fileLine);
+            if (!fileLine.empty() && !fileLine.compare(fingerprint)) {
                 isValid = true;
                 break;
             }
         }
     }
+    else {
+        LOG((CLOG_ERR "Fail to open trusted fingerprints file: %s", trustedServersFilename.c_str()));
+    }
 
     file.close();
     return isValid;