Class: JWTKeeper::Token

Inherits:
Object
  • Object
show all
Defined in:
lib/jwt_keeper/token.rb

Overview

This class acts as the main interface to wrap the concerns of JWTs. Handling everything from encoding to invalidation.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ void

Initalizes a new web token

Parameters:

  • options (Hash) (defaults to: {}) —

    the custom claims to encode

  • secret —

    the secret to use during encoding, defaults to config

  • cookie_secret —

    the cookie secret to use during encoding



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# File 'lib/jwt_keeper/token.rb', line 12

def initialize(options = {})
  @secret = options.delete(:secret) || JWTKeeper.configuration.secret
  @cookie_secret = options.delete(:cookie_secret)
  @claims = {
    nbf: DateTime.now.to_i, # not before
    iat: DateTime.now.to_i, # issued at
    jti: SecureRandom.uuid  # JWT ID
  }

  @claims.merge!(JWTKeeper.configuration.base_claims)
  @claims.merge!(options)
  @claims[:exp] = @claims[:exp].to_i if @claims[:exp].is_a?(Time)
end

Instance Attribute Details

#claims ⇒ Object

Returns the value of attribute claims.



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# File 'lib/jwt_keeper/token.rb', line 5

def claims
  @claims
end

#cookie_secret ⇒ Object

Returns the value of attribute cookie_secret.



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# File 'lib/jwt_keeper/token.rb', line 5

def cookie_secret
  @cookie_secret
end

#secret ⇒ Object

Returns the value of attribute secret.



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# File 'lib/jwt_keeper/token.rb', line 5

def secret
  @secret
end

Class Method Details

.create(options) ⇒ Token

Creates a new web token

Parameters:

  • options (Hash) —

    the custom claims to encode

  • secret —

    the secret to use during encoding, defaults to config

Returns:

  • (Token) —

    token object



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# File 'lib/jwt_keeper/token.rb', line 30

def self.create(options)
  cookie_secret = SecureRandom.hex(16) if JWTKeeper.configuration.cookie_lock
  new(options.merge(cookie_secret: cookie_secret))
end

.find(raw_token, secret: nil, cookie_secret: nil, iss: nil) ⇒ Token

Decodes and validates an existing token

Parameters:

  • raw_token (String) —

    the raw token

  • cookie_secret (String) (defaults to: nil) —

    the cookie secret

Returns:

  • (Token) —

    token object



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# File 'lib/jwt_keeper/token.rb', line 39

def self.find(raw_token, secret: nil, cookie_secret: nil, iss: nil)
  claims = decode(raw_token, secret: secret, cookie_secret: cookie_secret, iss: iss)
  return nil if claims.nil?

  new_token = new(secret: secret, cookie_secret: cookie_secret, iss: iss)
  new_token.claims = claims

  return nil if new_token.revoked?
  new_token
end

.revoke(token_jti) ⇒ void

This method returns an undefined value.

Revokes a web token

Parameters:

  • token_jti (String) —

    the token unique id



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# File 'lib/jwt_keeper/token.rb', line 62

def self.revoke(token_jti)
  Datastore.revoke(token_jti, JWTKeeper.configuration.expiry.from_now.to_i)
end

.rotate(token_jti) ⇒ void

This method returns an undefined value.

Sets a token to the pending rotation state. The expire is set to the maxium possible time but is inherently ignored by the token’s exp check and then rewritten with the revokation on rotate.

Parameters:

  • token_jti (String) —

    the token unique id



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# File 'lib/jwt_keeper/token.rb', line 55

def self.rotate(token_jti)
  Datastore.rotate(token_jti, JWTKeeper.configuration.expiry.from_now.to_i)
end

Instance Method Details

#id ⇒ String

Easy interface for using the token’s id

Returns:

  • (String) —

    token’s uuid



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# File 'lib/jwt_keeper/token.rb', line 68

def id
  claims[:jti]
end

#invalid? ⇒ Boolean

Checks if the token invalid?

Returns:

  • (Boolean) 


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# File 'lib/jwt_keeper/token.rb', line 120

def invalid?
  self.class.decode(
    encode,
    secret: secret,
    cookie_secret: cookie_secret
  ).nil? || revoked?
end

#pending? ⇒ Boolean

Checks if a web token is pending a rotation

Returns:

  • (Boolean) 


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# File 'lib/jwt_keeper/token.rb', line 96

def pending?
  Datastore.pending?(id)
end

#revoke ⇒ void

This method returns an undefined value.

Revokes a web token



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# File 'lib/jwt_keeper/token.rb', line 89

def revoke
  return if invalid?
  Datastore.revoke(id, claims[:exp] - DateTime.now.to_i)
end

#revoked? ⇒ Boolean

Checks if a web token has been revoked

Returns:

  • (Boolean) 


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# File 'lib/jwt_keeper/token.rb', line 108

def revoked?
  Datastore.revoked?(id)
end

#rotate(new_claims = nil) ⇒ Token

Revokes and creates a new web token

Parameters:

  • new_claims (Hash) (defaults to: nil) —

    Used to override and update claims during rotation

Returns:



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# File 'lib/jwt_keeper/token.rb', line 75

def rotate(new_claims = nil)
  return self if claims[:iss] != JWTKeeper.configuration.issuer
  revoke

  new_claims ||= claims.except(:iss, :aud, :exp, :nbf, :iat, :jti)
  new_token = self.class.create(new_claims)

  @claims = new_token.claims
  @cookie_secret = new_token.cookie_secret
  self
end

#to_cookie ⇒ Hash

Encodes the cookie

Returns:

  • (Hash) —

    the cookie options



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# File 'lib/jwt_keeper/token.rb', line 137

def to_cookie
  {
    value: cookie_secret,
    expires: Time.at(claims[:exp])
  }.merge(JWTKeeper.configuration.cookie_options)
end

#to_jwt ⇒ String Also known as: to_s

Encodes the jwt

Returns:

  • (String) —

    the encoded jwt



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# File 'lib/jwt_keeper/token.rb', line 130

def to_jwt
  encode
end

#valid? ⇒ Boolean

Checks if the token valid?

Returns:

  • (Boolean) 


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# File 'lib/jwt_keeper/token.rb', line 114

def valid?
  !invalid?
end

#version_mismatch? ⇒ Boolean

Checks if a web token is pending a global rotation

Returns:

  • (Boolean) 


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# File 'lib/jwt_keeper/token.rb', line 102

def version_mismatch?
  claims[:ver] != JWTKeeper.configuration.version
end