Class: Stytch::Sessions

Inherits:
Object
  • Object
show all
Includes:
RequestHelper
Defined in:
lib/stytch/sessions.rb

Instance Method Summary collapse

Methods included from RequestHelper

#delete_request, #get_request, #post_request, #put_request, #request_with_query_params

Constructor Details

#initialize(connection, project_id) ⇒ Sessions

Returns a new instance of Sessions.



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# File 'lib/stytch/sessions.rb', line 18

def initialize(connection, project_id)
  @connection = connection

  @project_id = project_id
  @cache_last_update = 0
  @jwks_loader = lambda do |options|
    @cached_keys = nil if options[:invalidate] && @cache_last_update < Time.now.to_i - 300
    @cached_keys ||= begin
      @cache_last_update = Time.now.to_i
      keys = []
      get_jwks(project_id: @project_id)['keys'].each do |r|
        keys << r
      end
      { keys: keys }
    end
  end
end

Instance Method Details

#authenticate(session_token: nil, session_duration_minutes: nil, session_jwt: nil, session_custom_claims: nil) ⇒ Object

Authenticate a session token and retrieve associated session data. If ‘session_duration_minutes` is included, update the lifetime of the session to be that many minutes from now. All timestamps are formatted according to the RFC 3339 standard and are expressed in UTC, e.g. `2021-12-29T12:33:09Z`. This endpoint requires exactly one `session_jwt` or `session_token` as part of the request. If both are included you will receive a `too_many_session_arguments` error.

Parameters:

session_token

The session token to authenticate. The type of this field is nilable String.

session_duration_minutes

Set the session lifetime to be this many minutes from now; minimum of 5 and a maximum of 527040 minutes (366 days). Note that a successful authentication will continue to extend the session this many minutes. The type of this field is nilable Integer.

session_jwt

The JWT to authenticate. You may provide a JWT that has expired according to its ‘exp` claim and needs to be refreshed. If the signature is valid and the underlying session is still active then Stytch will return a new JWT. The type of this field is nilable String.

session_custom_claims

Add a custom claims map to the Session being authenticated. Claims are only created if a Session is initialized by providing a value in ‘session_duration_minutes`. Claims will be included on the Session object and in the JWT. To update a key in an existing Session, supply a new value. To delete a key, supply a null value.

Custom claims made with reserved claims (“iss”, “sub”, “aud”, “exp”, “nbf”, “iat”, “jti”) will be ignored. Total custom claims size cannot exceed four kilobytes. The type of this field is nilable object.

Returns:

An object with the following fields:

request_id

Globally unique UUID that is returned with every API call. This value is important to log for debugging purposes; we may ask for this value to help identify a specific API call when helping you debug an issue. The type of this field is String.

session

If you initiate a Session, by including ‘session_duration_minutes` in your authenticate call, you’ll receive a full Session object in the response.

See [GET sessions](stytch.com/docs/api/session-get) for complete response fields.

The type of this field is Session (object).

session_token

A secret token for a given Stytch Session. The type of this field is String.

session_jwt

The JSON Web Token (JWT) for a given Stytch Session. The type of this field is String.

user

The ‘user` object affected by this API call. See the [Get user endpoint](stytch.com/docs/api/get-user) for complete response field details. The type of this field is User (object).

status_code

The HTTP status code of the response. Stytch follows standard HTTP response status code patterns, e.g. 2XX values equate to success, 3XX values are redirects, 4XX are client errors, and 5XX are server errors. The type of this field is Integer.



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# File 'lib/stytch/sessions.rb', line 106

def authenticate(
  session_token: nil,
  session_duration_minutes: nil,
  session_jwt: nil,
  session_custom_claims: nil
)
  headers = {}
  request = {}
  request[:session_token] = session_token unless session_token.nil?
  request[:session_duration_minutes] = session_duration_minutes unless session_duration_minutes.nil?
  request[:session_jwt] = session_jwt unless session_jwt.nil?
  request[:session_custom_claims] = session_custom_claims unless session_custom_claims.nil?

  post_request('/v1/sessions/authenticate', request, headers)
end

#authenticate_jwt(session_jwt, max_token_age_seconds: nil, session_duration_minutes: nil, session_custom_claims: nil) ⇒ Object

Parse a JWT and verify the signature. If max_token_age_seconds is unset, call the API directly If max_token_age_seconds is set and the JWT was issued (based on the “iat” claim) less than max_token_age_seconds seconds ago, then just verify locally and don’t call the API To force remote validation for all tokens, set max_token_age_seconds to 0 or call authenticate() If max_token_age_seconds is not supplied 300 seconds will be used as the default.



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# File 'lib/stytch/sessions.rb', line 202

def authenticate_jwt(
  session_jwt,
  max_token_age_seconds: nil,
  session_duration_minutes: nil,
  session_custom_claims: nil
)
  max_token_age_seconds = 300 if max_token_age_seconds.nil?

  if max_token_age_seconds == 0
    return authenticate(
      session_jwt: session_jwt,
      session_duration_minutes: session_duration_minutes,
      session_custom_claims: session_custom_claims
    )
  end

  session = authenticate_jwt_local(session_jwt, max_token_age_seconds: max_token_age_seconds)
  return session unless session.nil?

  authenticate(
    session_jwt: session_jwt,
    session_duration_minutes: session_duration_minutes,
    session_custom_claims: session_custom_claims
  )
rescue StandardError
  # JWT could not be verified locally. Check with the Stytch API.
  authenticate(
    session_jwt: session_jwt,
    session_duration_minutes: session_duration_minutes,
    session_custom_claims: session_custom_claims
  )
end

#authenticate_jwt_local(session_jwt, max_token_age_seconds: nil) ⇒ Object

Parse a JWT and verify the signature locally (without calling /authenticate in the API) Uses the cached value to get the JWK but if it is unavailable, it calls the get_jwks() function to get the JWK This method never authenticates a JWT directly with the API If max_token_age_seconds is not supplied 300 seconds will be used as the default.



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# File 'lib/stytch/sessions.rb', line 240

def authenticate_jwt_local(session_jwt, max_token_age_seconds: nil)
  max_token_age_seconds = 300 if max_token_age_seconds.nil?

  issuer = 'stytch.com/' + @project_id
  begin
    decoded_token = JWT.decode session_jwt, nil, true,
                               { jwks: @jwks_loader, iss: issuer, verify_iss: true, aud: @project_id, verify_aud: true, algorithms: ['RS256'] }

    session = decoded_token[0]
    iat_time = Time.at(session['iat']).to_datetime
    return nil unless iat_time + max_token_age_seconds >= Time.now

    session = marshal_jwt_into_session(session)
  rescue JWT::InvalidIssuerError
    raise JWTInvalidIssuerError
  rescue JWT::InvalidAudError
    raise JWTInvalidAudienceError
  rescue JWT::ExpiredSignature
    raise JWTExpiredSignatureError
  rescue JWT::IncorrectAlgorithm
    raise JWTIncorrectAlgorithmError
  end

  session
end

#get(user_id:) ⇒ Object

List all active Sessions for a given ‘user_id`. All timestamps are formatted according to the RFC 3339 standard and are expressed in UTC, e.g. `2021-12-29T12:33:09Z`.

Parameters:

user_id

The ‘user_id` to get active Sessions for. The type of this field is String.

Returns:

An object with the following fields:

request_id

Globally unique UUID that is returned with every API call. This value is important to log for debugging purposes; we may ask for this value to help identify a specific API call when helping you debug an issue. The type of this field is String.

sessions

An array of Session objects. The type of this field is list of Session (object).

status_code

The HTTP status code of the response. Stytch follows standard HTTP response status code patterns, e.g. 2XX values equate to success, 3XX values are redirects, 4XX are client errors, and 5XX are server errors. The type of this field is Integer.



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# File 'lib/stytch/sessions.rb', line 54

def get(
  user_id:
)
  headers = {}
  query_params = {
    user_id: user_id
  }
  request = request_with_query_params('/v1/sessions', query_params)
  get_request(request, headers)
end

#get_jwks(project_id:) ⇒ Object

Get the JSON Web Key Set (JWKS) for a project.

JWKS are rotated every ~6 months. Upon rotation, new JWTs will be signed using the new key set, and both key sets will be returned by this endpoint for a period of 1 month.

JWTs have a set lifetime of 5 minutes, so there will be a 5 minute period where some JWTs will be signed by the old JWKS, and some JWTs will be signed by the new JWKS. The correct JWKS to use for validation is determined by matching the ‘kid` value of the JWT and JWKS.

If you’re using one of our [backend SDKs](stytch.com/docs/sdks), the JWKS roll will be handled for you.

If you’re using your own JWT validation library, many have built-in support for JWKS rotation, and you’ll just need to supply this API endpoint. If not, your application should decide which JWKS to use for validation by inspecting the ‘kid` value.

Parameters:

project_id

The ‘project_id` to get the JWKS for. The type of this field is String.

Returns:

An object with the following fields:

keys

The JWK The type of this field is list of JWK (object).

request_id

Globally unique UUID that is returned with every API call. This value is important to log for debugging purposes; we may ask for this value to help identify a specific API call when helping you debug an issue. The type of this field is String.

status_code

The HTTP status code of the response. Stytch follows standard HTTP response status code patterns, e.g. 2XX values equate to success, 3XX values are redirects, 4XX are client errors, and 5XX are server errors. The type of this field is Integer.



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# File 'lib/stytch/sessions.rb', line 183

def get_jwks(
  project_id:
)
  headers = {}
  query_params = {}
  request = request_with_query_params("/v1/sessions/jwks/#{project_id}", query_params)
  get_request(request, headers)
end

#marshal_jwt_into_session(jwt) ⇒ Object 



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# File 'lib/stytch/sessions.rb', line 266

def marshal_jwt_into_session(jwt)
  stytch_claim = 'https://stytch.com/session'
  expires_at = jwt[stytch_claim]['expires_at'] || Time.at(jwt['exp']).to_datetime.utc.strftime('%Y-%m-%dT%H:%M:%SZ')
  # The custom claim set is all the claims in the payload except for the standard claims and
  # the Stytch session claim. The cleanest way to collect those seems to be naming what we want
  # to omit and filtering the rest to collect the custom claims.
  reserved_claims = ['aud', 'exp', 'iat', 'iss', 'jti', 'nbf', 'sub', stytch_claim]
  custom_claims = jwt.reject { |key, _| reserved_claims.include?(key) }
  {
    'session' => {
      'session_id' => jwt[stytch_claim]['id'],
      'user_id' => jwt['sub'],
      'started_at' => jwt[stytch_claim]['started_at'],
      'last_accessed_at' => jwt[stytch_claim]['last_accessed_at'],
      # For JWTs that include it, prefer the inner expires_at claim.
      'expires_at' => expires_at,
      'attributes' => jwt[stytch_claim]['attributes'],
      'authentication_factors' => jwt[stytch_claim]['authentication_factors'],
      'custom_claims' => custom_claims
    }
  }
end

#revoke(session_id: nil, session_token: nil, session_jwt: nil) ⇒ Object

Revoke a Session, immediately invalidating all of its session tokens. You can revoke a session in three ways: using its ID, or using one of its session tokens, or one of its JWTs. This endpoint requires exactly one of those to be included in the request. It will return an error if multiple are present.

Parameters:

session_id

The ‘session_id` to revoke. The type of this field is nilable String.

session_token

The session token to revoke. The type of this field is nilable String.

session_jwt

A JWT for the session to revoke. The type of this field is nilable String.

Returns:

An object with the following fields:

request_id

Globally unique UUID that is returned with every API call. This value is important to log for debugging purposes; we may ask for this value to help identify a specific API call when helping you debug an issue. The type of this field is String.

status_code

The HTTP status code of the response. Stytch follows standard HTTP response status code patterns, e.g. 2XX values equate to success, 3XX values are redirects, 4XX are client errors, and 5XX are server errors. The type of this field is Integer.



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# File 'lib/stytch/sessions.rb', line 143

def revoke(
  session_id: nil,
  session_token: nil,
  session_jwt: nil
)
  headers = {}
  request = {}
  request[:session_id] = session_id unless session_id.nil?
  request[:session_token] = session_token unless session_token.nil?
  request[:session_jwt] = session_jwt unless session_jwt.nil?

  post_request('/v1/sessions/revoke', request, headers)
end