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|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::JwtAuthenticatable do
let(:test_class) do
Class.new do
include Gitlab::JwtAuthenticatable
def self.secret_path
Rails.root.join('tmp', 'tests', '.jwt_shared_secret')
end
end
end
before do
FileUtils.rm_f(test_class.secret_path)
test_class.write_secret
end
shared_examples 'reading secret from the secret path' do
it 'returns 32 bytes' do
expect(secret).to be_a(String)
expect(secret.length).to eq(32)
expect(secret.encoding).to eq(Encoding::ASCII_8BIT)
end
it 'accepts a trailing newline' do
File.open(secret_path, 'a') { |f| f.write "\n" }
expect(secret.length).to eq(32)
end
it 'raises an exception if the secret file cannot be read' do
File.delete(secret_path)
expect { secret }.to raise_exception(Errno::ENOENT)
end
it 'raises an exception if the secret file contains the wrong number of bytes' do
File.truncate(secret_path, 0)
expect { secret }.to raise_exception(RuntimeError)
end
end
describe '.secret' do
it_behaves_like 'reading secret from the secret path' do
subject(:secret) { test_class.secret }
let(:secret_path) { test_class.secret_path }
end
end
describe '.read_secret' do
it_behaves_like 'reading secret from the secret path' do
subject(:secret) { test_class.read_secret(secret_path) }
let(:secret_path) { test_class.secret_path }
end
end
describe '.write_secret' do
context 'without an input' do
it 'uses mode 0600' do
expect(File.stat(test_class.secret_path).mode & 0777).to eq(0600)
end
it 'writes base64 data' do
bytes = Base64.strict_decode64(File.read(test_class.secret_path))
expect(bytes).not_to be_empty
end
end
context 'with an input' do
let(:another_path) do
Rails.root.join('tmp', 'tests', '.jwt_another_shared_secret')
end
after do
File.delete(another_path)
rescue Errno::ENOENT
end
it 'uses mode 0600' do
test_class.write_secret(another_path)
expect(File.stat(another_path).mode & 0777).to eq(0600)
end
it 'writes base64 data' do
test_class.write_secret(another_path)
bytes = Base64.strict_decode64(File.read(another_path))
expect(bytes).not_to be_empty
end
end
end
describe '.decode_jwt' do |decode|
let(:payload) { {} }
context 'use included class secret' do
it 'accepts a correct header' do
encoded_message = JWT.encode(payload, test_class.secret, 'HS256')
expect { test_class.decode_jwt(encoded_message) }.not_to raise_error
end
it 'raises an error when the JWT is not signed' do
encoded_message = JWT.encode(payload, nil, 'none')
expect { test_class.decode_jwt(encoded_message) }.to raise_error(JWT::DecodeError)
end
it 'raises an error when the header is signed with the wrong secret' do
encoded_message = JWT.encode(payload, 'wrongsecret', 'HS256')
expect { test_class.decode_jwt(encoded_message) }.to raise_error(JWT::DecodeError)
end
end
context 'use an input secret' do
let(:another_secret) { 'another secret' }
it 'accepts a correct header' do
encoded_message = JWT.encode(payload, another_secret, 'HS256')
expect { test_class.decode_jwt(encoded_message, another_secret) }.not_to raise_error
end
it 'raises an error when the JWT is not signed' do
encoded_message = JWT.encode(payload, nil, 'none')
expect { test_class.decode_jwt(encoded_message, another_secret) }.to raise_error(JWT::DecodeError)
end
it 'raises an error when the header is signed with the wrong secret' do
encoded_message = JWT.encode(payload, 'wrongsecret', 'HS256')
expect { test_class.decode_jwt(encoded_message, another_secret) }.to raise_error(JWT::DecodeError)
end
end
context 'issuer option' do
let(:payload) { { 'iss' => 'test_issuer' } }
it 'returns decoded payload if issuer is correct' do
encoded_message = JWT.encode(payload, test_class.secret, 'HS256')
payload = test_class.decode_jwt(encoded_message, issuer: 'test_issuer')
expect(payload[0]).to match a_hash_including('iss' => 'test_issuer')
end
it 'raises an error when the issuer is incorrect' do
payload['iss'] = 'somebody else'
encoded_message = JWT.encode(payload, test_class.secret, 'HS256')
expect { test_class.decode_jwt(encoded_message, issuer: 'test_issuer') }.to raise_error(JWT::DecodeError)
end
end
context 'iat_after option' do
it 'returns decoded payload if iat is valid' do
freeze_time do
encoded_message = JWT.encode(payload.merge(iat: (Time.current - 10.seconds).to_i), test_class.secret, 'HS256')
payload = test_class.decode_jwt(encoded_message, iat_after: Time.current - 20.seconds)
expect(payload[0]).to match a_hash_including('iat' => be_a(Integer))
end
end
it 'raises an error if iat is invalid' do
encoded_message = JWT.encode(payload.merge(iat: 'wrong'), test_class.secret, 'HS256')
expect { test_class.decode_jwt(encoded_message, iat_after: true) }.to raise_error(JWT::DecodeError)
end
it 'raises an error if iat is absent' do
encoded_message = JWT.encode(payload, test_class.secret, 'HS256')
expect { test_class.decode_jwt(encoded_message, iat_after: true) }.to raise_error(JWT::DecodeError)
end
it 'raises an error if iat is too far in the past' do
freeze_time do
encoded_message = JWT.encode(payload.merge(iat: (Time.current - 30.seconds).to_i), test_class.secret, 'HS256')
expect do
test_class.decode_jwt(encoded_message, iat_after: Time.current - 20.seconds)
end.to raise_error(JWT::ExpiredSignature, 'Token has expired')
end
end
end
end
end
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