wkd: implement basic lookup of keys through wkd

wkd is the web key directory. See the Readme.md in
  /lib/nickserver/wkd

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/zbase32.rb b/lib/zbase32.rb
new file mode 100644
index 0000000..754213d
--- /dev/null
+++ b/lib/zbase32.rb
@@ -0,0 +1,19 @@
+module ZBase32
+
+  ALPHABET = 'ybndrfg8ejkmcpqxot1uwisza345h769'.split('').freeze
+
+  def self.encode32(bin_string)
+    bin_string.scan(/[01]{1,5}/).map do |bits|
+      ALPHABET[bits.ljust(5, '0').to_i(2)]
+    end.join
+  end
+
+  def self.decode32(enc)
+    bin = enc.split('').map do |char|
+      ALPHABET.index(char).to_s(2).rjust(5, '0')
+    end.join
+    bin[0, (8 * (bin.length / 8))]
+     # .sub /10*$/ ,'1'
+  end
+
+end