From 52dd4eb58bda84cb084cc119447cb83073b47510 Mon Sep 17 00:00:00 2001
From: elijah <elijah@riseup.net>
Date: Tue, 21 Jun 2016 17:48:07 -0700
Subject: vendor base32 gem

---
 vendor/base32/LICENSE        | 19 +++++++++++++
 vendor/base32/base32.gemspec | 10 +++++++
 vendor/base32/lib/base32.rb  | 67 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 vendor/base32/LICENSE
 create mode 100644 vendor/base32/base32.gemspec
 create mode 100644 vendor/base32/lib/base32.rb

(limited to 'vendor/base32')

diff --git a/vendor/base32/LICENSE b/vendor/base32/LICENSE
new file mode 100644
index 0000000..cdc04d9
--- /dev/null
+++ b/vendor/base32/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2007-2011 Samuel Tesla
+
+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/vendor/base32/base32.gemspec b/vendor/base32/base32.gemspec
new file mode 100644
index 0000000..4e84cea
--- /dev/null
+++ b/vendor/base32/base32.gemspec
@@ -0,0 +1,10 @@
+$:.push File.expand_path('../lib', __FILE__)
+
+Gem::Specification.new do |s|
+  s.name    = 'base32'
+  s.version = '0.3.2'
+  s.authors = ['Samuel Tesla']
+  s.email   = 'samuel.tesla@gmail.com'
+  s.summary = 'Ruby extension for base32 encoding and decoding'
+  s.require_paths = ['lib']
+end
diff --git a/vendor/base32/lib/base32.rb b/vendor/base32/lib/base32.rb
new file mode 100644
index 0000000..4df2b1a
--- /dev/null
+++ b/vendor/base32/lib/base32.rb
@@ -0,0 +1,67 @@
+require 'openssl'
+
+# Module for encoding and decoding in Base32 per RFC 3548
+module Base32
+  TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567'.freeze
+
+  class Chunk
+    def initialize(bytes)
+      @bytes = bytes
+    end
+
+    def decode
+      bytes = @bytes.take_while {|c| c != 61} # strip padding
+      n = (bytes.length * 5.0 / 8.0).floor
+      p = bytes.length < 8 ? 5 - (n * 8) % 5 : 0
+      c = bytes.inject(0) {|m,o| (m << 5) + Base32.table.index(o.chr)} >> p
+      (0..n-1).to_a.reverse.collect {|i| ((c >> i * 8) & 0xff).chr}
+    end
+
+    def encode
+      n = (@bytes.length * 8.0 / 5.0).ceil
+      p = n < 8 ? 5 - (@bytes.length * 8) % 5 : 0
+      c = @bytes.inject(0) {|m,o| (m << 8) + o} << p
+      [(0..n-1).to_a.reverse.collect {|i| Base32.table[(c >> i * 5) & 0x1f].chr},
+       ("=" * (8-n))]
+    end
+  end
+
+  def self.chunks(str, size)
+    result = []
+    bytes = str.bytes
+    while bytes.any? do
+      result << Chunk.new(bytes.take(size))
+      bytes = bytes.drop(size)
+    end
+    result
+  end
+
+  def self.encode(str)
+    chunks(str, 5).collect(&:encode).flatten.join
+  end
+
+  def self.decode(str)
+    chunks(str, 8).collect(&:decode).flatten.join
+  end
+
+  def self.random_base32(length=16, padding=true)
+    random = ''
+    OpenSSL::Random.random_bytes(length).each_byte do |b|
+      random << self.table[b % 32]
+    end
+    padding ? random.ljust((length / 8.0).ceil * 8, '=') : random
+  end
+
+  def self.table=(table)
+    raise ArgumentError, "Table must have 32 unique characters" unless self.table_valid?(table)
+    @table = table
+  end
+
+  def self.table
+    @table || TABLE
+  end
+
+  def self.table_valid?(table)
+    table.bytes.to_a.size == 32 && table.bytes.to_a.uniq.size == 32
+  end
+end
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