initial commit. there is already a radix64 implementation

24 files changed, 700 insertions, 0 deletions

diff --git a/.bnsignore b/.bnsignore
new file mode 100644
index 0000000..5fa69e9
--- /dev/null
+++ b/.bnsignore
@@ -0,0 +1,18 @@
+# The list of files that should be ignored by Mr Bones.
+# Lines that start with '#' are comments.
+#
+# A .gitignore file can be used instead by setting it as the ignore
+# file in your Rakefile:
+#
+#   Bones {
+#     ignore_file  '.gitignore'
+#   }
+#
+# For a project with a C extension, the following would be a good set of
+# exclude patterns (uncomment them if you want to use them):
+# *.[oa]
+# *~
+announcement.txt
+coverage
+doc
+pkg
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/.gitignore
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..a8a9268
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,2 @@
+source 'http://rubygems.org'
+gem 'rspec'
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..32a4b81
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,18 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    diff-lcs (1.1.2)
+    rspec (2.6.0)
+      rspec-core (~> 2.6.0)
+      rspec-expectations (~> 2.6.0)
+      rspec-mocks (~> 2.6.0)
+    rspec-core (2.6.4)
+    rspec-expectations (2.6.0)
+      diff-lcs (~> 1.1.2)
+    rspec-mocks (2.6.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rspec
diff --git a/History.txt b/History.txt
new file mode 100644
index 0000000..42e88b7
--- /dev/null
+++ b/History.txt
@@ -0,0 +1,4 @@
+== 1.0.0 / 2011-06-25
+
+* 1 major enhancement
+  * Birthday!
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a9ec85f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,60 @@
+fpg
+===========
+
+FIXME (describe your package)
+
+Features
+--------
+
+* FIXME (list of features and unsolved problems)
+
+Examples
+--------
+
+    FIXME (code sample of usage)
+
+Requirements
+------------
+
+* FIXME (list of requirements)
+
+Install
+-------
+
+* FIXME (sudo gem install, anything else)
+
+Author
+------
+
+Original author: FIXME (author's name)
+
+Contributors:
+
+* FIXME (contributor 1?)
+* FIXME (contributor 2?)
+
+License
+-------
+
+(The MIT License) FIXME (different license?)
+
+Copyright (c) 2011 FIXME (author's name)
+
+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/Rakefile b/Rakefile
new file mode 100644
index 0000000..9229c7d
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,10 @@
+require "rake/gempackagetask"
+require "rake/clean"
+
+CLEAN << "pkg" << "doc" << "coverage"
+task :default => [:rspec]
+
+Dir['tasks/**/*.rake'].each { |t| load t }
+
+Rake::GemPackageTask.new(eval(File.read("fpg.gemspec"))) { |pkg| }
+
diff --git a/bin/fpg b/bin/fpg
new file mode 100755
index 0000000..db09e33
--- /dev/null
+++ b/bin/fpg
@@ -0,0 +1,7 @@
+#!/usr/bin/env ruby
+
+require File.expand_path(
+    File.join(File.dirname(__FILE__), %w[.. lib fpg]))
+
+# Put your code here
+
diff --git a/fpg.gemspec b/fpg.gemspec
new file mode 100644
index 0000000..0664086
--- /dev/null
+++ b/fpg.gemspec
@@ -0,0 +1,20 @@
+# encoding: utf-8
+
+$: << File.expand_path('../lib', __FILE__)
+
+Gem::Specification.new do |s|
+  s.name         = "fpg"
+  s.version      = 0
+  s.authors      = []
+  s.email        = "immerda.ch"
+  s.homepage     = "immerda.ch"
+  s.summary      = ""
+  s.description  = ""
+
+
+  s.files        = `git ls-files lib`.split("\n") + %w(README.textile CHANGELOG.textile man/arver.5)
+  s.executables =  [ 'fpg' ]
+  s.platform     = Gem::Platform::RUBY
+  s.require_path = 'lib'
+  s.rubyforge_project = '[none]'
+end
diff --git a/lib/fpg.rb b/lib/fpg.rb
new file mode 100644
index 0000000..eca9897
--- /dev/null
+++ b/lib/fpg.rb
@@ -0,0 +1,60 @@
+
+module Fpg
+
+  # :stopdoc:
+  LIBPATH = ::File.expand_path(::File.dirname(__FILE__)) + ::File::SEPARATOR
+  PATH = ::File.dirname(LIBPATH) + ::File::SEPARATOR
+  VERSION = ::File.read(PATH + 'version.txt').strip
+  # :startdoc:
+
+  # Returns the library path for the module. If any arguments are given,
+  # they will be joined to the end of the libray path using
+  # <tt>File.join</tt>.
+  #
+  def self.libpath( *args )
+    rv =  args.empty? ? LIBPATH : ::File.join(LIBPATH, args.flatten)
+    if block_given?
+      begin
+        $LOAD_PATH.unshift LIBPATH
+        rv = yield
+      ensure
+        $LOAD_PATH.shift
+      end
+    end
+    return rv
+  end
+
+  # Returns the lpath for the module. If any arguments are given,
+  # they will be joined to the end of the path using
+  # <tt>File.join</tt>.
+  #
+  def self.path( *args )
+    rv = args.empty? ? PATH : ::File.join(PATH, args.flatten)
+    if block_given?
+      begin
+        $LOAD_PATH.unshift PATH
+        rv = yield
+      ensure
+        $LOAD_PATH.shift
+      end
+    end
+    return rv
+  end
+
+  # Utility method used to require all files ending in .rb that lie in the
+  # directory below this file that has the same name as the filename passed
+  # in. Optionally, a specific _directory_ name can be passed in such that
+  # the _filename_ does not have to be equivalent to the directory.
+  #
+  def self.require_all_libs_relative_to( fname, dir = nil )
+    dir ||= ::File.basename(fname, '.*')
+    search_me = ::File.expand_path(
+        ::File.join(::File.dirname(fname), dir, '**', '*.rb'))
+
+    Dir.glob(search_me).sort.each {|rb| require rb}
+  end
+
+end  # module Fpg
+
+Fpg.require_all_libs_relative_to(__FILE__)
+
diff --git a/lib/fpg/io/radix64.rb b/lib/fpg/io/radix64.rb
new file mode 100644
index 0000000..49102a0
--- /dev/null
+++ b/lib/fpg/io/radix64.rb
@@ -0,0 +1,104 @@
+module FPG
+  class Radix64
+    def char_table
+        @char_table ||= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".each_byte.collect.to_a
+    end
+    def pad
+        pad_s.unpack("C1!").first
+    end
+    def pad_s
+      "="
+    end
+    def char2six_table
+        @char2six_table ||= Hash[char_table.zip((0..63).to_a)]
+    end
+    def char2six(char)
+        char2six_table[char]
+    end
+    def six2char(six)
+        char_table[six]
+    end
+    def quad2bytes(quad)
+        q = (quad.unpack("C4!").collect { |v| char2six(v) }).to_a
+        [ (q[0]<<2)+(q[1]>>4), ((q[1]<<4)%256)+(q[2]>>2), ((q[2]<<6)%256)+q[3] ]
+    end
+    def padded_quad2bytes(quad)
+        if quad[2] == pad_s then
+            q = quad.unpack("C2!").collect { |v| char2six(v) }
+            [ (q[0]<<2)+(q[1]>>4), ((q[1]<<4)%256)>>4 ]
+        else
+            q = quad.unpack("C3!").collect { |v| char2six(v) }
+            [ (q[0]<<2)+(q[1]>>4),  ((q[1]<<4)%256)+(q[2]>>2), ((q[2]<<6)%256) ]
+        end
+    end
+    def bytes2quad(bytes)
+        [ six2char(bytes[0]>>2),                      six2char(((bytes[0]<<4)%64)+(bytes[1]>>4)),
+          six2char(((bytes[1]<<2)%64)+(bytes[2]>>6)), six2char(bytes[2]%64) ].pack("C4!")
+    end
+    def bytes2padded_quad(bytes)
+        if bytes.length == 1
+            [six2char(bytes[0]>>2), six2char((bytes[0]<<4)%64), pad, pad].pack("C4!")
+        elsif bytes.length == 2
+            [ six2char(bytes[0]>>2), six2char(((bytes[0]<<4)%64)+(bytes[1]>>4)),
+              six2char((bytes[1]<<2)%64), pad].pack("C4!")
+        end
+    end
+    def de_armor( stream )
+      stream.each do |line|
+        line.chop!
+        return if line.length == 0
+        0.step(line.length-1, 4) do |i|
+          quad = line[i..i+3]
+          if quad[3] == pad_s
+            bytes = padded_quad2bytes(quad)
+            if bytes.length == 2 and bytes[1] != 0
+              yield bytes[0]
+              yield bytes[1]
+            elsif bytes[0] != 0
+              yield bytes[0]
+            end
+            return
+          end
+          bytes = quad2bytes(quad)
+          yield bytes[0]
+          yield bytes[1]
+          yield bytes[2]
+        end
+      end
+    end
+    def armor( stream )
+      line_buffer = ""
+      line_length = 0
+      buffer = [0,0,0]
+      buffer_size = 0
+      stream.each_byte do |byte|
+        if buffer_size == 3 then
+          line_buffer << bytes2quad(buffer)
+          line_length += 4
+          buffer_size = 0
+        end
+        if line_length > 63 then
+          yield line_buffer
+          line_length = 0
+          line_buffer = ""
+        end
+        buffer[buffer_size] = byte
+        buffer_size += 1
+      end
+      if buffer_size == 1
+        line_buffer << bytes2padded_quad([buffer[0]])
+      elsif buffer_size == 2
+        line_buffer << bytes2padded_quad([buffer[0],buffer[1]])
+      end
+      yield line_buffer
+    end
+    def armor_public_key( stream )
+      yield Versioning.public_key_header
+      armor( stream )
+      yield Versioning.public_key_footer
+    end
+  end
+end
+
+
+
diff --git a/lib/fpg/version.rb b/lib/fpg/version.rb
new file mode 100644
index 0000000..dc66bf0
--- /dev/null
+++ b/lib/fpg/version.rb
@@ -0,0 +1,13 @@
+module FPG
+  class Versioning
+    def self.public_key_header
+      "-----BEGIN FGP PUBLIC KEY BLOCK-----\n#{version_info}\n"
+    end
+    def self.public_key_footer
+      "-----END FGP PUBLIC KEY BLOCK-----\n"
+    end
+    def self.version_info
+      "Version: Friendlier Privacy Guard 0.0.0\n"
+    end
+  end
+end
diff --git a/spec/fixtures/test.bare.pub b/spec/fixtures/test.bare.pub
new file mode 100644
index 0000000..160f4c6
--- /dev/null
+++ b/spec/fixtures/test.bare.pub
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diff --git a/spec/fixtures/test.bare.sec b/spec/fixtures/test.bare.sec
new file mode 100644
index 0000000..f40df2c
--- /dev/null
+++ b/spec/fixtures/test.bare.sec
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+=9toC
+-----END PGP PRIVATE KEY BLOCK-----
diff --git a/spec/fpg_spec.rb b/spec/fpg_spec.rb
new file mode 100644
index 0000000..6dbc295
--- /dev/null
+++ b/spec/fpg_spec.rb
@@ -0,0 +1,6 @@
+
+require File.join(File.dirname(__FILE__), %w[spec_helper])
+
+describe Fpg do
+end
+
diff --git a/spec/radix64_spec.rb b/spec/radix64_spec.rb
new file mode 100644
index 0000000..73262d1
--- /dev/null
+++ b/spec/radix64_spec.rb
@@ -0,0 +1,60 @@
+
+require File.join(File.dirname(__FILE__), %w[spec_helper])
+
+require 'stringio'
+
+describe Radix64 do
+  before(:each) do
+   @radix = Radix64.new
+   @binary_pub = File.open "spec/fixtures/test.bin.pub", 'rb'
+   @armored_pub = File.open "spec/fixtures/test.bare.pub", 'r'
+   @binary_sec = File.open "spec/fixtures/test.bin.sec", 'rb'
+   @armored_sec = File.open "spec/fixtures/test.bare.sec", 'r'
+   @in = ""
+   @in2 = ""
+  end
+
+  it "should correctly armor a binary public key" do
+    @radix.armor( @binary_pub ) { |line| @in << line << "\n" }
+    @armored_pub.read.should == @in
+  end
+  it "should correctly armor a binary private key" do
+    @radix.armor( @binary_sec ) { |line| @in << line << "\n" }
+    @armored_sec.read.should == @in
+  end
+  it "should correctly dearmor a public key" do
+    @radix.de_armor( @armored_pub ) { |byte| @in << [byte].pack("C1!") }
+    @binary_pub.read.should == @in
+  end
+  it "should de/-armor to the same key" do
+    @radix.de_armor( @armored_pub ) { |byte| @in << byte }
+    @radix.armor( @in ) { |line| @in2 << line << "\n" }
+    @armored_pub.rewind
+    @armored_pub.read.should == @in2
+  end
+  it "should armor/dearmor to the same key" do
+    in_str = StringIO.new(@in)
+    @radix.armor( @binary_sec ) { |line| in_str << line }
+    in_str << "\n"
+    in_str.rewind
+    @radix.de_armor( in_str ) { |byte| @in2 << [byte].pack("C1!") }
+    @binary_sec.rewind
+    @binary_sec.read.should == @in2
+  end
+  it "should stay invariant under de-/armoring" do
+    first = ""
+    @radix.armor( @binary_pub ) { |line| first << line << "\n" }
+    
+    in_str = StringIO.new(first.clone)
+    10.times do
+      in_str.rewind
+      @in = ""
+      @radix.de_armor( in_str ) { |byte| @in << byte }
+      in_str.rewind
+      @radix.armor( @in ) { |line| in_str << line << "\n" }
+    end
+    in_str.rewind
+    in_str.read.should == first
+  end
+end
+
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..a435f1d
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,7 @@
+require File.expand_path(File.join(File.dirname(__FILE__), %w[.. lib fpg]))
+
+include FPG
+
+RSpec.configure do |config|
+end
+
diff --git a/tasks/rspec.rake b/tasks/rspec.rake
new file mode 100644
index 0000000..c2a4ce4
--- /dev/null
+++ b/tasks/rspec.rake
@@ -0,0 +1,2 @@
+require 'rspec/core/rake_task'
+RSpec::Core::RakeTask.new(:rspec)
diff --git a/test/test_fpg.rb b/test/test_fpg.rb
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/test_fpg.rb
diff --git a/version.txt b/version.txt
new file mode 100644
index 0000000..77d6f4c
--- /dev/null
+++ b/version.txt
@@ -0,0 +1 @@
+0.0.0