Artifact [7da9883682]

Artifact 7da98836827e2f9edd4edf0ab9652011dfd76816f52e7c40aa709534167acbfa:

• File internal/oltp/oltp.go — part of check-in [bcef58408e] at 2026-08-15 21:50:38 on branch trunk — xfer: push gating with RFC §6 login verification; forge OLTP v1

  quarry user add derives the shared secret via a clone handshake (project code, no .zit bytes) and stores it in oltp.db. Gated repos verify body or x-f-l-c cookie logins per request; pulls stay anonymous. Fossil pushes authenticate end-to-end; zit's client stops sending credentials after round 1 (zit#74) so its pushes fail closed until that lands. (user: dmestas, size: 2010) [annotate] [blame] [check-ins using]

// Package oltp is quarry's forge OLTP database (0001 §8): the only
// authoritative non-DAG state. v1 holds sync users — per-repo login
// credentials for push gating. Small by construction; the litestream
// replica is the recovery story when deployment warrants it.
package oltp

import (
	"database/sql"
	"fmt"

	"github.com/ncruces/go-sqlite3/driver"
	_ "github.com/ncruces/go-sqlite3/embed"
)

const schema = `
CREATE TABLE IF NOT EXISTS sync_user (
	repo   TEXT NOT NULL,
	user   TEXT NOT NULL,
	secret TEXT NOT NULL, -- RFC §6.3 shared secret (40 hex); plaintext never stored
	PRIMARY KEY (repo, user)
);`

type DB struct {
	db *sql.DB
}

func Open(path string) (*DB, error) {
	db, err := driver.Open("file:" + path)
	if err != nil {
		return nil, err
	}
	if _, err := db.Exec(`PRAGMA journal_mode=WAL; PRAGMA busy_timeout=5000;`); err != nil {
		db.Close()
		return nil, fmt.Errorf("oltp: pragmas: %w", err)
	}
	if _, err := db.Exec(schema); err != nil {
		db.Close()
		return nil, fmt.Errorf("oltp: schema: %w", err)
	}
	return &DB{db: db}, nil
}

func (d *DB) Close() error { return d.db.Close() }

// SetSyncUser stores (replacing) one repo user's shared secret.
func (d *DB) SetSyncUser(repo, user, secret string) error {
	_, err := d.db.Exec(`INSERT OR REPLACE INTO sync_user (repo, user, secret)
		VALUES (?, ?, ?)`, repo, user, secret)
	return err
}

// Secret returns the stored shared secret for one repo user.
func (d *DB) Secret(repo, user string) (string, bool) {
	var s string
	err := d.db.QueryRow(`SELECT secret FROM sync_user WHERE repo = ? AND user = ?`,
		repo, user).Scan(&s)
	return s, err == nil
}

// Gated reports whether a repo has any sync users — the v1 policy
// switch: no users means anonymous push stays allowed (local use),
// one or more users means pushes must authenticate.
func (d *DB) Gated(repo string) bool {
	var n int
	if err := d.db.QueryRow(`SELECT count(*) FROM sync_user WHERE repo = ?`, repo).Scan(&n); err != nil {
		return false
	}
	return n > 0
}