feat(tfstated): implement HTTP basic auth

pkg/database/accounts.go

@@ -0,0 +1,88 @@
+package database
+
+import (
+	"database/sql"
+	"fmt"
+	"log/slog"
+	"time"
+
+	"git.adyxax.org/adyxax/tfstated/pkg/model"
+	"go.n16f.net/uuid"
+)
+
+func (db *DB) LoadAccountByUsername(username string) (*model.Account, error) {
+	account := model.Account{
+		Username: username,
+	}
+	var (
+		encryptedPassword []byte
+		created           int64
+		lastLogin         int64
+	)
+	err := db.QueryRow(
+		`SELECT id, password, is_admin, created, last_login, settings
+           FROM accounts
+           WHERE username = ?;`,
+		username,
+	).Scan(&account.Id,
+		&encryptedPassword,
+		&account.IsAdmin,
+		&created,
+		&lastLogin,
+		&account.Settings,
+	)
+	if err != nil {
+		return nil, err
+	}
+	password, err := db.dataEncryptionKey.DecryptAES256(encryptedPassword)
+	if err != nil {
+		return nil, err
+	}
+	account.Password = string(password)
+	account.Created = time.Unix(created, 0)
+	account.LastLogin = time.Unix(lastLogin, 0)
+	return &account, nil
+}
+
+func (db *DB) InitAdminAccount() error {
+	tx, err := db.Begin()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err != nil {
+			_ = tx.Rollback()
+		}
+	}()
+	var hasAdminAccount bool
+	if err = tx.QueryRowContext(db.ctx, `SELECT EXISTS (SELECT 1 FROM accounts WHERE is_admin);`).Scan(&hasAdminAccount); err != nil {
+		return fmt.Errorf("failed to select if there is an admin account in the database: %w", err)
+	}
+	if hasAdminAccount {
+		tx.Rollback()
+	} else {
+		var password uuid.UUID
+		if err = password.Generate(uuid.V4); err != nil {
+			return fmt.Errorf("failed to generate initial admin password: %w", err)
+		}
+		var encryptedPassword []byte
+		encryptedPassword, err = db.dataEncryptionKey.EncryptAES256([]byte(password.String()))
+		if err != nil {
+			return fmt.Errorf("failed to encrypt initial admin password: %w", err)
+		}
+		if _, err = tx.ExecContext(db.ctx,
+			`INSERT INTO accounts(username, password, is_admin)
+		       VALUES ("admin", :password, TRUE)
+		       ON CONFLICT DO UPDATE SET password = :password
+		         WHERE username = "admin";`,
+			sql.Named("password", encryptedPassword),
+		); err != nil {
+			return fmt.Errorf("failed to set initial admin password: %w", err)
+		}
+		err = tx.Commit()
+		if err == nil {
+			slog.Info("Generated an initial admin password, please change it or delete the admin account after your first login", "password", password.String())
+		}
+	}
+	return err
+}