generateSalt.go

// Generates a salt for the given user
func GenerateSalt(user string, pass string) string { 

	var password []byte
	var username []byte

	username = []byte("user:" + user + pass)

	// Dial up a mongoDB session
	session, _ := mgo.Dial("127.0.0.1:27017/")
    	
    	// Opens the "passwords" databases, "salts" collection
    	c := session.DB("passwords").C("salts")

	// Result with store username + password
    	result := Salting_Struct{}

	// Generate random number, then use SHA-2 algorithm for salt
	// Take only the first 12 digits for salt
	result.Salt := SHA(string(rand.Intn(10000000)))[12:]	

    	// Search for the salted username, place in result the salt
    	c.Insert(&result)
    	
        // close mongoDB session to free resources
    	session.Close()
}