Tronax
7b1c18590e
Argon2id password hashing (PHC format, self-encoded/decoded without an external lib) with constant-time verification, UserStore (create/get by email and id) and SessionStore (opaque crypto/rand tokens, SHA-256 hashed in DB, create/lookup/revoke, last_seen_at bump on lookup). HTTP layer: Register/Login/Logout handlers + RequireAuth middleware. Login uses a dummy-hash path so unknown-email and wrong-password yield the same timing/shape, narrowing user enumeration. Tokens accepted via Bearer header (native clients) or session cookie (HttpOnly, SameSite=Lax). Routes wired in api.go: POST /auth/register, /auth/login, /auth/logout. Verified with go test, go vet and an end-to-end smoke test against a real PostgreSQL container (register/login/logout/duplicate/short-pw/wrong-pw). OIDC (Phase B part 2) follows next; the issueSession helper is reused.
95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
package auth
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import (
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"context"
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"errors"
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"fmt"
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"github.com/google/uuid"
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"github.com/jackc/pgx/v5"
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"github.com/jackc/pgx/v5/pgxpool"
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)
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// User is the application-side view of a row in the users table.
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type User struct {
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ID uuid.UUID
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Email string
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PasswordHash *string // nil for OIDC-only accounts
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OIDCSubject *string
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OIDCIssuer *string
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DisplayName *string
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}
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// ErrUserNotFound is returned when no user matches the query.
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var ErrUserNotFound = errors.New("user not found")
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// UserStore wraps database access for the users table.
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type UserStore struct {
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pool *pgxpool.Pool
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}
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// NewUserStore constructs a UserStore backed by the given pool.
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func NewUserStore(pool *pgxpool.Pool) *UserStore {
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return &UserStore{pool: pool}
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}
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// CreateUser inserts a new user with a password hash (email/password accounts).
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// It returns the created user. Email uniqueness violations surface as ErrEmailTaken.
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var ErrEmailTaken = errors.New("email already registered")
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func (s *UserStore) CreateUser(ctx context.Context, email, passwordHash, displayName string) (User, error) {
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const q = `
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INSERT INTO users (email, password_hash, display_name)
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VALUES ($1, $2, NULLIF($3, ''))
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RETURNING id, email, password_hash, oidc_subject, oidc_issuer, display_name`
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var u User
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var dn *string
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err := s.pool.QueryRow(ctx, q, email, passwordHash, displayName).
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Scan(&u.ID, &u.Email, &u.PasswordHash, &u.OIDCSubject, &u.OIDCIssuer, &dn)
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if err != nil {
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if isUniqueViolation(err) {
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return User{}, fmt.Errorf("%w: %s", ErrEmailTaken, email)
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}
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return User{}, fmt.Errorf("create user: %w", err)
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}
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u.DisplayName = dn
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return u, nil
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}
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// GetUserByEmail loads a user by its (case-sensitive) email address.
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func (s *UserStore) GetUserByEmail(ctx context.Context, email string) (User, error) {
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const q = `
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SELECT id, email, password_hash, oidc_subject, oidc_issuer, display_name
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FROM users WHERE email = $1`
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var u User
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var dn *string
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err := s.pool.QueryRow(ctx, q, email).
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Scan(&u.ID, &u.Email, &u.PasswordHash, &u.OIDCSubject, &u.OIDCIssuer, &dn)
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if err != nil {
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if errors.Is(err, pgx.ErrNoRows) {
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return User{}, ErrUserNotFound
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}
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return User{}, fmt.Errorf("get user by email: %w", err)
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}
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u.DisplayName = dn
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return u, nil
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}
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// GetUserByID loads a user by its primary key.
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func (s *UserStore) GetUserByID(ctx context.Context, id uuid.UUID) (User, error) {
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const q = `
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SELECT id, email, password_hash, oidc_subject, oidc_issuer, display_name
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FROM users WHERE id = $1`
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var u User
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var dn *string
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err := s.pool.QueryRow(ctx, q, id).
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Scan(&u.ID, &u.Email, &u.PasswordHash, &u.OIDCSubject, &u.OIDCIssuer, &dn)
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if err != nil {
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if errors.Is(err, pgx.ErrNoRows) {
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return User{}, ErrUserNotFound
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}
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return User{}, fmt.Errorf("get user by id: %w", err)
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}
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u.DisplayName = dn
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return u, nil
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}
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