More complete oidc

app/models/oidc_refresh_token.rb

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+class OidcRefreshToken < ApplicationRecord
+  belongs_to :application
+  belongs_to :user
+  belongs_to :oidc_access_token
+  has_many :oidc_access_tokens, foreign_key: :oidc_access_token_id, dependent: :nullify
+
+  before_validation :generate_token, on: :create
+  before_validation :set_expiry, on: :create
+  before_validation :set_token_family_id, on: :create
+
+  validates :token_digest, presence: true, uniqueness: true
+
+  scope :valid, -> { where("expires_at > ?", Time.current).where(revoked_at: nil) }
+  scope :expired, -> { where("expires_at <= ?", Time.current) }
+  scope :revoked, -> { where.not(revoked_at: nil) }
+  scope :active, -> { valid }
+
+  # For token rotation detection (prevents reuse attacks)
+  scope :in_family, ->(family_id) { where(token_family_id: family_id) }
+
+  attr_accessor :token  # Store plaintext token temporarily for returning to client
+
+  def expired?
+    expires_at <= Time.current
+  end
+
+  def revoked?
+    revoked_at.present?
+  end
+
+  def active?
+    !expired? && !revoked?
+  end
+
+  def revoke!
+    update!(revoked_at: Time.current)
+  end
+
+  # Revoke all refresh tokens in the same family (token rotation security)
+  def revoke_family!
+    return unless token_family_id.present?
+
+    OidcRefreshToken.in_family(token_family_id).update_all(revoked_at: Time.current)
+  end
+
+  # Verify a plaintext token against the stored digest
+  def self.find_by_token(plaintext_token)
+    return nil if plaintext_token.blank?
+
+    # Try to find tokens that could match (we can't search by hash directly)
+    # This is less efficient but necessary with BCrypt
+    # In production, you might want to add a token prefix or other optimization
+    all.find do |refresh_token|
+      refresh_token.token_matches?(plaintext_token)
+    end
+  end
+
+  def token_matches?(plaintext_token)
+    return false if plaintext_token.blank? || token_digest.blank?
+
+    BCrypt::Password.new(token_digest) == plaintext_token
+  rescue BCrypt::Errors::InvalidHash
+    false
+  end
+
+  private
+
+  def generate_token
+    # Generate a secure random token
+    plaintext = SecureRandom.urlsafe_base64(48)
+    self.token = plaintext  # Store temporarily for returning to client
+
+    # Hash it with BCrypt for storage
+    self.token_digest = BCrypt::Password.create(plaintext)
+  end
+
+  def set_expiry
+    # Use application's configured refresh token TTL
+    self.expires_at ||= application.refresh_token_expiry
+  end
+
+  def set_token_family_id
+    # Use a random ID to group tokens in the same rotation chain
+    # This helps detect token reuse attacks
+    self.token_family_id ||= SecureRandom.random_number(2**31)
+  end
+end