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package auth
import (
"fmt"
"math/rand"
"time"
"github.com/seaweedfs/seaweedfs/weed/sftpd/user"
"golang.org/x/crypto/ssh"
)
// PasswordAuthenticator handles password-based authentication
type PasswordAuthenticator struct {
userStore user.Store
enabled bool
}
// NewPasswordAuthenticator creates a new password authenticator
func NewPasswordAuthenticator(userStore user.Store, enabled bool) *PasswordAuthenticator {
return &PasswordAuthenticator{
userStore: userStore,
enabled: enabled,
}
}
// Enabled returns whether password authentication is enabled
func (a *PasswordAuthenticator) Enabled() bool {
return a.enabled
}
// Authenticate validates a password for a user
func (a *PasswordAuthenticator) Authenticate(conn ssh.ConnMetadata, password []byte) (*ssh.Permissions, error) {
username := conn.User()
// Check if password auth is enabled
if !a.enabled {
return nil, fmt.Errorf("password authentication disabled")
}
// Validate password against user store
if a.userStore.ValidatePassword(username, password) {
return &ssh.Permissions{
Extensions: map[string]string{
"username": username,
},
}, nil
}
// Add delay to prevent brute force attacks
time.Sleep(time.Duration(100+rand.Intn(100)) * time.Millisecond)
return nil, fmt.Errorf("authentication failed")
}
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