#3480 Fix new ssh key adding issues (#3565)

* #3480 Fix new ssh key adding issues

Added regular exp match (108) and remove training new line (111) that cause system to think its an ssh2 key.

* #3480 Fix new ssh key adding issues

-Sanitizate new lines (windows format) in posted key
-Edit sanitization implementation to use string replace for code readability and maintenability.

models/ssh_key.go

@@ -104,8 +104,18 @@ func extractTypeFromBase64Key(key string) (string, error) {
 
 // parseKeyString parses any key string in OpenSSH or SSH2 format to clean OpenSSH string (RFC4253).
 func parseKeyString(content string) (string, error) {
-	// Transform all legal line endings to a single "\n".
-	content = strings.NewReplacer("\r\n", "\n", "\r", "\n").Replace(content)
+	// Transform all legal line endings to a single "\n"
+
+	// Replace all windows full new lines ("\r\n")
+	content = strings.Replace(content, "\r\n", "\n", -1)
+
+	// Replace all windows half new lines ("\r"), if it happen not to match replace above
+	content = strings.Replace(content, "\r", "\n", -1)
+
+	// Replace ending new line as its may cause unwanted behaviour (extra line means not a single line key | OpenSSH key)
+	content = strings.TrimRight(content, "\n")
+
+	// split lines
 	lines := strings.Split(content, "\n")
 
 	var keyType, keyContent, keyComment string