Fixed isValidPathComponent() to detect invalid chars or reserved names.

src/platforms/windows/windowsFile.cpp

@@ -92,7 +92,50 @@ const vmime::string windowsFileSystemFactory::pathToStringImpl(const vmime::util
 
 const bool windowsFileSystemFactory::isValidPathComponent(const vmime::utility::file::path::component& comp) const
 {
-	return (comp.getBuffer().find_first_of("\\*") == vmime::string::npos);
+	const string& buffer = comp.getBuffer();
+
+	// Check for invalid characters
+	for (string::size_type i = 0 ; i < buffer.length() ; ++i)
+	{
+		const unsigned char c = buffer[i];
+
+		switch (c)
+		{
+		// Reserved characters
+		case '<': case '>': case ':':
+		case '"': case '/': case '\\':
+		case '|': case '$': case '*':
+
+			return false;
+
+		default:
+
+			if (c <= 31)
+				return false;
+		}
+	}
+
+	// Check for reserved names
+	if (buffer.length() == 3)
+	{
+		if (buffer == "CON" || buffer == "PRN" || buffer == "AUX" || buffer == "NUL")
+			return false;
+	}
+	else if (buffer.length() == 4)
+	{
+		if (buffer[0] == 'C' && buffer[1] == 'O' &&   // COM1-COM9
+		    buffer[2] == 'M' && (buffer[3] >= '0' && buffer[3] <= '9'))
+		{
+			return false;
+		}
+		else if (buffer[0] == 'L' && buffer[1] == 'P' &&   // LPT1-LPT9
+		         buffer[2] == 'T' && (buffer[3] >= '0' && buffer[3] <= '9'))
+		{
+			return false;
+		}
+	}
+
+	return true;
 }