alexei.dolgolyov
32de5b26a8
Blue-green zero-downtime deploys, promote flow validation. Dual auth: local (bcrypt + JWT) and OAuth2/OIDC (any provider). Auth middleware, login page, auth settings UI. Structured logging (slog JSON), config export to YAML. Graceful shutdown with deploy draining. Multi-stage Dockerfile and production docker-compose.yml. Swap phase order: Volumes & Env before UI Polish.
112 lines
3.0 KiB
Go
112 lines
3.0 KiB
Go
package auth
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import (
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"crypto/hmac"
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"crypto/sha256"
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"errors"
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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"golang.org/x/crypto/bcrypt"
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)
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// ErrInvalidCredentials indicates that the supplied username/password is wrong.
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var ErrInvalidCredentials = errors.New("invalid credentials")
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// ErrInvalidToken indicates that the JWT is invalid or expired.
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var ErrInvalidToken = errors.New("invalid or expired token")
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// TokenExpiry is the lifetime of a JWT session token.
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const TokenExpiry = 24 * time.Hour
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// jwtClaims extends jwt.RegisteredClaims with application-specific fields.
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type jwtClaims struct {
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jwt.RegisteredClaims
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UserID string `json:"user_id"`
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Username string `json:"username"`
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Role string `json:"role"`
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}
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// LocalAuth handles password hashing and JWT token management for local auth mode.
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type LocalAuth struct {
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jwtSecret []byte
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}
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// NewLocalAuth creates a LocalAuth deriving the JWT signing key from the encryption key
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// using HMAC-SHA256.
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func NewLocalAuth(encKey [32]byte) *LocalAuth {
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mac := hmac.New(sha256.New, encKey[:])
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mac.Write([]byte("docker-watcher-jwt-secret"))
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return &LocalAuth{
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jwtSecret: mac.Sum(nil),
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}
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}
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// HashPassword hashes a plaintext password using bcrypt.
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func HashPassword(password string) (string, error) {
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hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
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if err != nil {
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return "", fmt.Errorf("hash password: %w", err)
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}
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return string(hash), nil
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}
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// CheckPassword compares a plaintext password against a bcrypt hash.
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func CheckPassword(hash, password string) error {
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if err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password)); err != nil {
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return ErrInvalidCredentials
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}
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return nil
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}
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// GenerateToken creates a signed JWT for the given user claims.
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func (la *LocalAuth) GenerateToken(claims Claims) (SessionToken, error) {
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expiresAt := time.Now().Add(TokenExpiry)
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwtClaims{
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(expiresAt),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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Issuer: "docker-watcher",
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},
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UserID: claims.UserID,
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Username: claims.Username,
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Role: claims.Role,
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})
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signed, err := token.SignedString(la.jwtSecret)
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if err != nil {
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return SessionToken{}, fmt.Errorf("sign token: %w", err)
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}
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return SessionToken{
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Token: signed,
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ExpiresAt: expiresAt,
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}, nil
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}
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// ValidateToken parses and validates a JWT, returning the embedded claims.
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func (la *LocalAuth) ValidateToken(tokenString string) (Claims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &jwtClaims{}, func(token *jwt.Token) (any, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return la.jwtSecret, nil
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})
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if err != nil {
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return Claims{}, ErrInvalidToken
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}
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claims, ok := token.Claims.(*jwtClaims)
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if !ok || !token.Valid {
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return Claims{}, ErrInvalidToken
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}
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return Claims{
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UserID: claims.UserID,
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Username: claims.Username,
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Role: claims.Role,
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}, nil
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}
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