commit 243ed398a0a3ac73b8b691ad6f635afa15dd335b
Author: Alexander Olofsson <me@ananace.dev>
Date:   Mon Feb 23 18:37:34 2026 +0100

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6c0a512
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,17 @@
+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+/vendor/
+
+# rspec failure tracking
+.rspec_status
+
+# install data
+/Gemfile.lock
+/config.yml
+
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..43cf2ec
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,10 @@
+default:
+  image: ruby:3.2.9
+
+  before_script:
+    - gem install bundler -v 2.6.9
+    - bundle install
+
+example_job:
+  script:
+    - bundle exec rake
diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000..34c5164
--- /dev/null
+++ b/.rspec
@@ -0,0 +1,3 @@
+--format documentation
+--color
+--require spec_helper
diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..537f3da
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,8 @@
+AllCops:
+  TargetRubyVersion: 3.1
+
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+
+Style/StringLiteralsInInterpolation:
+  EnforcedStyle: double_quotes
diff --git a/Containerfile b/Containerfile
new file mode 100644
index 0000000..c71c654
--- /dev/null
+++ b/Containerfile
@@ -0,0 +1,16 @@
+FROM docker.io/library/ruby
+
+ENV APP_HOME /app
+ENV RACK_ENV production
+WORKDIR /app
+
+ADD Gemfile /app/
+ADD *gemspec /app/
+ADD config.ru /app/
+ADD lib /app/lib/
+
+RUN bundle config set without 'development' && \
+    bundle install
+
+EXPOSE 9292/tcp
+CMD ["bundle", "exec", "rackup"]
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..d550875
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# Specify your gem's dependencies in infisical_license_server.gemspec
+gemspec
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..4437e05
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2026 Alexander Olofsson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..19c7741
--- /dev/null
+++ b/README.md
@@ -0,0 +1,16 @@
+Infisical License Server
+========================
+
+A simple implementation of the Infisical license server API, which supports on-prem online licenses.
+
+## Usage
+
+Create a `config.yml` file following the example in [`config.yml.example`](config.yml.example), then run the application using `rackup`.
+
+The configuration values that need to be set in Infisical to use the server are;
+- `LICENSE_KEY=<.>` - should be set to the `key` value for the plan you want to use
+- `LICENSE_SERVER_URL=<.>` - should be set to the URL where this server is running
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..cca7175
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+require "rubocop/rake_task"
+
+RuboCop::RakeTask.new
+
+task default: %i[spec rubocop]
diff --git a/config.ru b/config.ru
new file mode 100644
index 0000000..dec1b5d
--- /dev/null
+++ b/config.ru
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require_relative 'lib/infisical_license_server'
+
+# Ensure config can be loaded
+InfisicalLicenseServer.config
+
+map '/api/auth/v1' do
+  run InfisicalLicenseServer::API::AuthV1
+end
+map '/api/license/v1' do
+  run InfisicalLicenseServer::API::LicenseV1
+end
+map '/api/license-server/v1' do
+  run InfisicalLicenseServer::API::LicenseServerV1
+end
+map '/' do
+  run InfisicalLicenseServer::Server 
+end
diff --git a/config.yml.example b/config.yml.example
new file mode 100644
index 0000000..52ba15f
--- /dev/null
+++ b/config.yml.example
@@ -0,0 +1,8 @@
+---
+plans:
+  'Some plan name':
+    key: 'Some API KEY'
+    # https://github.com/Infisical/infisical/blob/main/backend/src/ee/services/license/license-types.ts#L34
+    features:
+      identityLimit: 10
+      samlSSO: true
diff --git a/infisical_license_server.gemspec b/infisical_license_server.gemspec
new file mode 100644
index 0000000..34a38fc
--- /dev/null
+++ b/infisical_license_server.gemspec
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+require_relative "lib/infisical_license_server/version"
+
+Gem::Specification.new do |spec|
+  spec.name = "infisical_license_server"
+  spec.version = InfisicalLicenseServer::VERSION
+  spec.authors = ["Alexander Olofsson"]
+  spec.email = ["me@ananace.dev"]
+
+  spec.summary = "TODO: Write a short summary, because RubyGems requires one."
+  spec.description = "TODO: Write a longer description or delete this line."
+  spec.homepage = "TODO: Put your gem's website or public repo URL here."
+  spec.license = "MIT"
+  spec.required_ruby_version = ">= 3.1.0"
+
+  spec.metadata["allowed_push_host"] = "TODO: Set to your gem server 'https://example.com'"
+
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = "TODO: Put your gem's public repo URL here."
+  spec.metadata["changelog_uri"] = "TODO: Put your gem's CHANGELOG.md URL here."
+
+  # Specify which files should be added to the gem when it is released.
+  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  gemspec = File.basename(__FILE__)
+  spec.files = IO.popen(%w[git ls-files -z], chdir: __dir__, err: IO::NULL) do |ls|
+    ls.readlines("\x0", chomp: true).reject do |f|
+      (f == gemspec) ||
+        f.start_with?(*%w[bin/ test/ spec/ features/ .git .gitlab-ci.yml appveyor Gemfile])
+    end
+  end
+  spec.bindir = "exe"
+  spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  # For more information and examples about making a new gem, check out our
+  # guide at: https://bundler.io/guides/creating_gem.html
+  spec.add_dependency 'rackup'
+  spec.add_dependency 'sinatra'
+  spec.add_dependency 'webrick'
+
+  spec.add_development_dependency 'rake'
+  spec.add_development_dependency 'rspec'
+  spec.add_development_dependency 'rubocop'
+  spec.add_development_dependency 'sinatra-contrib'
+end
diff --git a/lib/infisical_license_server.rb b/lib/infisical_license_server.rb
new file mode 100644
index 0000000..2808d09
--- /dev/null
+++ b/lib/infisical_license_server.rb
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+# frozen_string_literal: true
+
+require_relative "infisical_license_server/version"
+
+module InfisicalLicenseServer
+  class Error < StandardError; end
+
+  module API
+    autoload :AuthV1, 'infisical_license_server/api/auth'
+    autoload :LicenseV1, 'infisical_license_server/api/license'
+    autoload :LicenseServerV1, 'infisical_license_server/api/license_server'
+  end
+
+  autoload :Config, 'infisical_license_server/config'
+  autoload :Server, 'infisical_license_server/server'
+
+  def self.config
+    @config ||= InfisicalLicenseServer::Config.new
+  end
+end
diff --git a/lib/infisical_license_server/api/auth.rb b/lib/infisical_license_server/api/auth.rb
new file mode 100644
index 0000000..4c4389f
--- /dev/null
+++ b/lib/infisical_license_server/api/auth.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'base64'
+require 'sinatra/base'
+
+module InfisicalLicenseServer::API
+  class AuthV1 < Sinatra::Base
+    configure :development do
+      require 'sinatra/reloader'
+      register Sinatra::Reloader
+    end
+
+    enable :logging
+
+    post '/license-login' do
+      key = request.get_header('HTTP_X_API_KEY')
+      region = request.get_header('HTTP_X_REGION')
+
+      error 400, 'Missing API key' unless key
+
+      plan = InfisicalLicenseServer.config.plan_for key
+      error 401 unless plan
+
+      region = " (region #{region})" if region
+      logger.info "New auth for #{plan['plan']}#{region}"
+
+      {
+        token: Base64.strict_encode64(
+          {
+            auth: Time.now.to_i,
+            key: plan['key'],
+            plan: plan['plan']
+          }.to_json
+        )
+      }.to_json
+    end
+  end
+end
diff --git a/lib/infisical_license_server/api/license.rb b/lib/infisical_license_server/api/license.rb
new file mode 100644
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--- /dev/null
+++ b/lib/infisical_license_server/api/license.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'sinatra/base'
+
+module InfisicalLicenseServer::API
+  class LicenseV1 < Sinatra::Base
+    configure :development do
+      require 'sinatra/reloader'
+      register Sinatra::Reloader
+    end
+
+    enable :logging
+
+    get '/plan' do
+      auth = request.get_header('HTTP_AUTHORIZATION')
+      error 401 unless InfisicalLicenseServer.config.auth? auth
+
+      plan = InfisicalLicenseServer.config.plan_for(auth)
+
+      {
+        currentPlan: plan['merged'].compact
+      }.to_json
+    end
+
+    patch '/license' do
+      auth = request.get_header('HTTP_AUTHORIZATION')
+      error 401 unless InfisicalLicenseServer.config.auth? auth
+      
+      plan = InfisicalLicenseServer.config.plan_for(auth)
+      error 500 unless plan
+
+      #request.body.rewind
+      data = JSON.parse(request.body.read)
+
+      logger.info "Plan #{plan['plan']} uses #{data['usedSeats']} seats and #{data['usedIdentitySeats']} identities"
+
+      # Cache these for next plan request
+      plan['features']['membersUsed'] = data['usedSeats']
+      plan['features']['identitiesUsed'] = data['usedIdentitySeats']
+
+      nil
+    end
+  end
+end
diff --git a/lib/infisical_license_server/api/license_server.rb b/lib/infisical_license_server/api/license_server.rb
new file mode 100644
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--- /dev/null
+++ b/lib/infisical_license_server/api/license_server.rb
@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+require 'sinatra/base'
+
+module InfisicalLicenseServer::API
+  class LicenseServerV1 < Sinatra::Base
+    # https://github.com/Infisical/infisical/blob/main/backend/src/ee/services/license/licence-enums.ts
+    HEADERS = %w[Allowed Used].freeze
+    ROWS = [
+      { name: "Organization identity limit", field: "identityLimit" },
+      { name: "Project limit", field: "workspaceLimit" },
+      { name: "Environment limit", field: "environmentLimit" },
+      { name: "Secret versioning", field: "secretVersioning" },
+      { name: "Point in time recovery", field: "pitRecovery" },
+      { name: "RBAC", field: "rbac" },
+      { name: "Custom rate limits", field: "customRateLimits" },
+      { name: "Custom alerts", field: "customAlerts" },
+      { name: "Audit logs", field: "auditLogs" },
+      { name: "SAML SSO", field: "samlSSO" },
+      { name: "SSH Host Groups", field: "sshHostGroups" },
+      { name: "Hardware Security Module (HSM)", field: "hsm" },
+      { name: "OIDC SSO", field: "oidcSSO" },
+      { name: "Secret approvals", field: "secretApproval" },
+      { name: "Secret rotation", field: "secretRotation" },
+      { name: "Instance User Management", field: "instanceUserManagement" },
+      { name: "External KMS", field: "externalKms" }
+    ].freeze
+
+    configure :development do
+      require 'sinatra/reloader'
+      register Sinatra::Reloader
+    end
+
+    enable :logging
+
+    get '/customers/on-prem-plan/table' do
+      auth = request.get_header('HTTP_AUTHORIZATION')
+      error 401 unless InfisicalLicenseServer.config.auth? auth
+
+      plan = InfisicalLicenseServer.config.plan_for(auth)
+      error 500 unless plan
+
+      {
+        head: HEADERS.map { |head| { name: head } },
+        rows: ROWS.map do |row|
+          {
+            name: row[:name],
+            allowed: row[:field].end_with?('Limit') ? true : (plan['merged'][row[:field]] || false),
+          }
+        end
+      }.to_json
+    end
+  end
+end
diff --git a/lib/infisical_license_server/config.rb b/lib/infisical_license_server/config.rb
new file mode 100644
index 0000000..0c8ad36
--- /dev/null
+++ b/lib/infisical_license_server/config.rb
@@ -0,0 +1,121 @@
+# frozen_string_literal: true
+
+require 'psych'
+
+require_relative 'util'
+
+class InfisicalLicenseServer::Config
+  AUTH_TIME = 1 * 24 * 60 * 60
+
+  attr_reader :data
+
+  def initialize(file = 'config.yml')
+    raise 'Missing configuration file' unless File.exist?(file)
+
+    @data = Psych.load_file(file)
+  end
+
+  def auth?(token)
+    Time.now - Time.at(decode_auth(token)['auth']) <= AUTH_TIME
+  rescue StandardError => e
+    puts "Failed to read auth token - #{e.class}: #{e}"
+    puts e.backtrace
+    false
+  end
+
+  def valid_key?(key)
+    data['plans'].any? { |_, plan| plan['key'] == key }
+  end
+
+  def plan_for(key)
+    if key.start_with? 'Bearer '
+      key = decode_auth(key)['key']
+    end
+
+    plan_name, plan = data['plans'].find { |_, search| search['key'] == key }
+    return nil unless plan
+
+    plan['merged'] = default_plan.merge(_id: plan_name, slug: 'enterprise').deep_merge(plan['features'])
+    plan['plan'] = plan_name
+    plan
+  end
+
+  def decode_auth(token)
+    raise 'Missing auth' unless token
+
+    token = token[7..] if token.start_with? 'Bearer '
+
+    JSON.parse(Base64.decode64(token))
+  end
+
+  # https://github.com/Infisical/infisical/blob/main/backend/src/ee/services/license/license-fns.ts#L55
+  def self.default_plan
+    {
+      _id: nil,
+      slug: nil,
+      tier: -1,
+      workspaceLimit: nil,
+      workspacesUsed: 0,
+      memberLimit: nil,
+      membersUsed: 0,
+      environmentLimit: nil,
+      environmentsUsed: 0,
+      identityLimit: nil,
+      identitiesUsed: 0,
+      dynamicSecret: false,
+      secretVersioning: true,
+      pitRecovery: false,
+      ipAllowlisting: false,
+      rbac: false,
+      githubOrgSync: false,
+      customRateLimits: false,
+      subOrganization: false,
+      customAlerts: false,
+      secretAccessInsights: false,
+      auditLogs: false,
+      auditLogsRetentionDays: 0,
+      auditLogStreams: false,
+      auditLogStreamLimit: 3,
+      samlSSO: false,
+      enforceGoogleSSO: false,
+      hsm: false,
+      oidcSSO: false,
+      scim: false,
+      ldap: false,
+      groups: false,
+      status: nil,
+      trial_end: nil,
+      has_used_trial: true,
+      secretApproval: false,
+      secretRotation: false,
+      caCrl: false,
+      instanceUserManagement: false,
+      externalKms: false,
+      rateLimits: {
+        readLimit: 60,
+        writeLimit: 200,
+        secretsLimit: 40
+      },
+      pkiEst: false,
+      pkiAcme: false,
+      enforceMfa: false,
+      projectTemplates: false,
+      kmip: false,
+      gateway: false,
+      sshHostGroups: false,
+      secretScanning: false,
+      enterpriseSecretSyncs: false,
+      enterpriseCertificateSyncs: false,
+      enterpriseAppConnections: false,
+      fips: false,
+      eventSubscriptions: false,
+      machineIdentityAuthTemplates: false,
+      pkiLegacyTemplates: false,
+      secretShareExternalBranding: false
+    }
+  end
+
+  def default_plan
+    self.class.default_plan
+  end
+end
diff --git a/lib/infisical_license_server/server.rb b/lib/infisical_license_server/server.rb
new file mode 100644
index 0000000..fb5273f
--- /dev/null
+++ b/lib/infisical_license_server/server.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require 'sinatra/base'
+
+module InfisicalLicenseServer
+  class Server < Sinatra::Base
+    configure :development do
+      require 'sinatra/reloader'
+      register Sinatra::Reloader
+
+      enable :logging
+    end
+
+    get '/healthz' do
+      'Ok'
+    end
+  end
+end
diff --git a/lib/infisical_license_server/util.rb b/lib/infisical_license_server/util.rb
new file mode 100644
index 0000000..56f7973
--- /dev/null
+++ b/lib/infisical_license_server/util.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class ::Hash
+  def deep_merge(second)
+    merger = proc { |key, v1, v2| Hash === v1 && Hash === v2 ? v1.merge(v2, &merger) : v2 }
+    self.merge(second, &merger)
+  end
+end
diff --git a/lib/infisical_license_server/version.rb b/lib/infisical_license_server/version.rb
new file mode 100644
index 0000000..ab1da6b
--- /dev/null
+++ b/lib/infisical_license_server/version.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module InfisicalLicenseServer
+  VERSION = "0.1.0"
+end
diff --git a/spec/infisical_license_server_spec.rb b/spec/infisical_license_server_spec.rb
new file mode 100644
index 0000000..b78acb8
--- /dev/null
+++ b/spec/infisical_license_server_spec.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+RSpec.describe InfisicalLicenseServer do
+  it "has a version number" do
+    expect(InfisicalLicenseServer::VERSION).not_to be nil
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..989d3bf
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require "infisical_license_server"
+
+RSpec.configure do |config|
+  # Enable flags like --only-failures and --next-failure
+  config.example_status_persistence_file_path = ".rspec_status"
+
+  # Disable RSpec exposing methods globally on `Module` and `main`
+  config.disable_monkey_patching!
+
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+end