Add functionality for checking whether the provided thumbprint is kno…

…wn to the soap client

vim25/soap/client.go

@@ -318,6 +318,20 @@ func (c *Client) Thumbprint(host string) string {
 	return c.hosts[host]
 }
 
+// KnownThumbprint checks whether the provided thumbprint is known to this client.
+func (c *Client) KnownThumbprint(tp string) bool {
+	c.hostsMu.Lock()
+	defer c.hostsMu.Unlock()
+
+	for _, v := range c.hosts {
+		if v == tp {
+			return true
+		}
+	}
+
+	return false
+}
+
 // LoadThumbprints from file with the give name.
 // If name is empty or name does not exist this function will return nil.
 func (c *Client) LoadThumbprints(file string) error {