93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
// SPDX-FileCopyrightText: Amolith <amolith@secluded.site>
|
|
//
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
package users
|
|
|
|
import (
|
|
"crypto/rand"
|
|
"database/sql"
|
|
"encoding/base64"
|
|
"time"
|
|
|
|
"git.sr.ht/~amolith/willow/db"
|
|
"golang.org/x/crypto/argon2"
|
|
)
|
|
|
|
// argonHash accepts two strings for the user's password and a random salt,
|
|
// hashes the password using the salt, and returns the hash as a base64-encoded
|
|
// string.
|
|
func argonHash(password, salt string) (string, error) {
|
|
decodedSalt, err := base64.StdEncoding.DecodeString(salt)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return base64.StdEncoding.EncodeToString(argon2.IDKey([]byte(password), decodedSalt, 2, 64*1024, 4, 64)), nil
|
|
}
|
|
|
|
// generateSalt generates a random salt and returns it as a base64-encoded
|
|
// string.
|
|
func generateSalt() (string, error) {
|
|
salt := make([]byte, 16)
|
|
_, err := rand.Read(salt)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return base64.StdEncoding.EncodeToString(salt), nil
|
|
}
|
|
|
|
// Register accepts a username and password, hashes the password and stores the
|
|
// hash and salt in the database.
|
|
func Register(dbConn *sql.DB, username, password string) error {
|
|
salt, err := generateSalt()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
hash, err := argonHash(password, salt)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return db.CreateUser(dbConn, username, hash, salt)
|
|
}
|
|
|
|
// Delete removes a user from the database.
|
|
func Delete(dbConn *sql.DB, username string) error { return db.DeleteUser(dbConn, username) }
|
|
|
|
// Authorised accepts a username string, a token string, and returns true if the
|
|
// user is authorised, false if not, and an error if one is encountered.
|
|
func Authorised(dbConn *sql.DB, username, token string) (bool, error) {
|
|
dbHash, dbSalt, err := db.GetUser(dbConn, username)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
providedHash, err := argonHash(token, dbSalt)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
return dbHash == providedHash, nil
|
|
}
|
|
|
|
// GetSession accepts a session cookie string and returns the username
|
|
func GetSession(dbConn *sql.DB, session string) (string, time.Time, error) {
|
|
return db.GetSession(dbConn, session)
|
|
}
|
|
|
|
// InvalidateSession invalidates a session by setting the expiration date to the
|
|
// current time.
|
|
func InvalidateSession(dbConn *sql.DB, session string) error {
|
|
return db.InvalidateSession(dbConn, session, time.Now())
|
|
}
|
|
|
|
// CreateSession accepts a username and a token and creates a session in the
|
|
// database.
|
|
func CreateSession(dbConn *sql.DB, username, token string, expiry time.Time) error {
|
|
return db.CreateSession(dbConn, username, token, expiry)
|
|
}
|
|
|
|
// GetUsers returns a list of all users in the database as a slice of strings.
|
|
func GetUsers(dbConn *sql.DB) ([]string, error) { return db.GetUsers(dbConn) }
|