passwords.go

// Users username and password, outputs password + salt
func Password(user string, pass string) string {

	var password []byte
	var username []byte

	// Converts username to bytes
	username = []byte("user:" + user + pass)

	// Dial up a mongoDB session
	session, err := mgo.Dial("127.0.0.1:27017/")
    	if err != nil {
	     fmt.Println(err)
	     return ""
    	}
    	
    	// Opens the "passwords" databases, "salts" collection
    	c := session.DB("passwords").C("salts")
    	
    	// Result with store username + password
    	result := Salting_Struct{}

    	// Search for the salted username, place in result the salt
        c.Find(bson.M{"username": SHA(username)}).One(&result)
    	
        // close mongoDB session to free resources
        session.Close()

	// Converts users input password + generated salt to bytes
	password = []byte(pass + result.salt)

	return SHA(password)
}