Print QR code for webauthn verification link

.codespellrc

@@ -2,4 +2,4 @@
 check-filenames=
 check-hidden=
 ignore-words=.codespellignore
-skip=*.pem,.git,man,vcr_cassettes,vendor,./lib/rubygems/net*,./lib/rubygems/resolv,./lib/rubygems/tsort,./lib/rubygems/timeout,./lib/rubygems/optparse
+skip=*.pem,.git,man,vcr_cassettes,vendor,./lib/rubygems/net*,./lib/rubygems/resolv,./lib/rubygems/tsort,./lib/rubygems/timeout,./lib/rubygems/optparse,./lib/rubygems/rqrcode_core

.rubocop.yml

@@ -14,6 +14,7 @@ AllCops:
     - lib/rubygems/optparse/**/*
     - lib/rubygems/net-protocol/**/*
     - lib/rubygems/net-http/**/*
+    - lib/rubygems/rqrcode_core/**/*
     - bundler/lib/bundler/vendor/**/*
   CacheRootDirectory: tmp/rubocop
   MaxFilesInCache: 5000
@@ -241,8 +242,8 @@ Lint/SafeNavigationConsistency:
 Lint/ScriptPermission:
   Enabled: true
   Exclude:
-    - 'bundler/lib/bundler/templates/Executable'
-    - 'bundler/lib/bundler/templates/Executable.*'
+    - "bundler/lib/bundler/templates/Executable"
+    - "bundler/lib/bundler/templates/Executable.*"
 
 Lint/ShadowedArgument:
   Enabled: true
@@ -406,8 +407,8 @@ Layout/SpaceInsideBlockBraces:
   Enabled: true
   SpaceBeforeBlockParameters: false
   Exclude:
-  - bundler/lib/bundler/templates/Gemfile
-  - bundler/lib/bundler/templates/gems.rb
+    - bundler/lib/bundler/templates/Gemfile
+    - bundler/lib/bundler/templates/gems.rb
 
 Layout/SpaceInsideHashLiteralBraces:
   Enabled: true
@@ -494,7 +495,7 @@ Naming/ClassAndModuleCamelCase:
 Naming/FileName:
   Enabled: true
   Exclude:
-    - 'bundler/spec/realworld/fixtures/warbler/bin/warbler-example.rb'
+    - "bundler/spec/realworld/fixtures/warbler/bin/warbler-example.rb"
 
 Naming/MemoizedInstanceVariableName:
   Enabled: true

Manifest.txt

@@ -542,6 +542,22 @@ lib/rubygems/resolver/specification.rb
 lib/rubygems/resolver/stats.rb
 lib/rubygems/resolver/vendor_set.rb
 lib/rubygems/resolver/vendor_specification.rb
+lib/rubygems/rqrcode_core/.document
+lib/rubygems/rqrcode_core/LICENSE.txt
+lib/rubygems/rqrcode_core/lib/rqrcode_core.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_8bit_byte.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_alphanumeric.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_bit_buffer.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_code.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_math.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_multi.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_numeric.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_polynomial.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_rs_block.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_segment.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_util.rb
+lib/rubygems/rqrcode_core/lib/rqrcode_core/version.rb
 lib/rubygems/s3_uri_signer.rb
 lib/rubygems/safe_marshal.rb
 lib/rubygems/safe_marshal/elements.rb

lib/rubygems/gemcutter_utilities.rb

@@ -2,6 +2,7 @@
 
 require_relative "remote_fetcher"
 require_relative "text"
+require_relative "rqrcode_core/lib/rqrcode_core"
 require_relative "gemcutter_utilities/webauthn_listener"
 require_relative "gemcutter_utilities/webauthn_poller"
 
@@ -259,6 +260,7 @@ def fetch_otp(credentials)
 
       url_with_port = "#{webauthn_url}?port=#{port}"
       say "You have enabled multi-factor authentication. Please visit #{url_with_port} to authenticate via security device. If you can't verify using WebAuthn but have OTP enabled, you can re-run the gem signin command with the `--otp [your_code]` option."
+      qrcode Gem::RQRCodeCore::QRCode.new(url_with_port)
 
       threads = [WebauthnListener.listener_thread(host, server), WebauthnPoller.poll_thread(options, host, webauthn_url, credentials)]
       otp_thread = wait_for_otp_thread(*threads)

lib/rubygems/rqrcode_core/.document

@@ -0,0 +1 @@
+# Vendored files do not need to be documented

lib/rubygems/rqrcode_core/LICENSE.txt

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2008 Duncan Robertson
+
+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.

lib/rubygems/rqrcode_core/lib/rqrcode_core.rb

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+module Gem::RQRCodeCore
+  require "rubygems/rqrcode_core/lib/rqrcode_core/qrcode"
+  require "rubygems/rqrcode_core/lib/rqrcode_core/version"
+end

lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require_relative "./qrcode/qr_8bit_byte"
+require_relative "./qrcode/qr_alphanumeric"
+require_relative "./qrcode/qr_bit_buffer"
+require_relative "./qrcode/qr_code"
+require_relative "./qrcode/qr_math"
+require_relative "./qrcode/qr_multi"
+require_relative "./qrcode/qr_numeric"
+require_relative "./qrcode/qr_polynomial"
+require_relative "./qrcode/qr_rs_block"
+require_relative "./qrcode/qr_segment"
+require_relative "./qrcode/qr_util"

lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_8bit_byte.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Gem::RQRCodeCore
+  class QR8bitByte
+    def initialize(data)
+      @data = data
+    end
+
+    def write(buffer)
+      buffer.byte_encoding_start(@data.bytesize)
+
+      @data.each_byte do |b|
+        buffer.put(b, 8)
+      end
+    end
+  end
+end

lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_alphanumeric.rb

@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+module Gem::RQRCodeCore
+  ALPHANUMERIC = [
+    "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I",
+    "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", " ", "$",
+    "%", "*", "+", "-", ".", "/", ":"
+  ].freeze
+
+  class QRAlphanumeric
+    def initialize(data)
+      unless QRAlphanumeric.valid_data?(data)
+        raise QRCodeArgumentError, "Not a alpha numeric uppercase string `#{data}`"
+      end
+
+      @data = data
+    end
+
+    def self.valid_data?(data)
+      (data.chars - ALPHANUMERIC).empty?
+    end
+
+    def write(buffer)
+      buffer.alphanumeric_encoding_start(@data.size)
+
+      @data.size.times do |i|
+        if i % 2 == 0
+          if i == (@data.size - 1)
+            value = ALPHANUMERIC.index(@data[i])
+            buffer.put(value, 6)
+          else
+            value = (ALPHANUMERIC.index(@data[i]) * 45) + ALPHANUMERIC.index(@data[i + 1])
+            buffer.put(value, 11)
+          end
+        end
+      end
+    end
+  end
+end

lib/rubygems/rqrcode_core/lib/rqrcode_core/qrcode/qr_bit_buffer.rb

@@ -0,0 +1,76 @@
+# frozen_string_literal: true
+
+module Gem::RQRCodeCore
+  class QRBitBuffer
+    attr_reader :buffer
+
+    PAD0 = 0xEC
+    PAD1 = 0x11
+
+    def initialize(version)
+      @version = version
+      @buffer = []
+      @length = 0
+    end
+
+    def get(index)
+      buf_index = (index / 8).floor
+      ((QRUtil.rszf(@buffer[buf_index], 7 - index % 8)) & 1) == 1
+    end
+
+    def put(num, length)
+      (0...length).each do |i|
+        put_bit(((QRUtil.rszf(num, length - i - 1)) & 1) == 1)
+      end
+    end
+
+    def get_length_in_bits
+      @length
+    end
+
+    def put_bit(bit)
+      buf_index = (@length / 8).floor
+      if @buffer.size <= buf_index
+        @buffer << 0
+      end
+
+      if bit
+        @buffer[buf_index] |= QRUtil.rszf(0x80, @length % 8)
+      end
+
+      @length += 1
+    end
+
+    def byte_encoding_start(length)
+      put(QRMODE[:mode_8bit_byte], 4)
+      put(length, QRUtil.get_length_in_bits(QRMODE[:mode_8bit_byte], @version))
+    end
+
+    def alphanumeric_encoding_start(length)
+      put(QRMODE[:mode_alpha_numk], 4)
+      put(length, QRUtil.get_length_in_bits(QRMODE[:mode_alpha_numk], @version))
+    end
+
+    def numeric_encoding_start(length)
+      put(QRMODE[:mode_number], 4)
+      put(length, QRUtil.get_length_in_bits(QRMODE[:mode_number], @version))
+    end
+
+    def pad_until(prefered_size)
+      # Align on byte
+      while get_length_in_bits % 8 != 0
+        put_bit(false)
+      end
+
+      # Pad with padding code words
+      while get_length_in_bits < prefered_size
+        put(PAD0, 8)
+        put(PAD1, 8) if get_length_in_bits < prefered_size
+      end
+    end
+
+    def end_of_message(max_data_bits)
+      put(0, 4) unless get_length_in_bits + 4 > max_data_bits
+    end
+  end
+end