Adding upstream version 3.2.1.upstream/3.2.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 320 insertions, 0 deletions

diff --git a/modules/experimental_dot_auth/basexx.lua b/modules/experimental_dot_auth/basexx.lua
new file mode 100644
index 0000000..86ac996
--- /dev/null
+++ b/modules/experimental_dot_auth/basexx.lua
@@ -0,0 +1,320 @@
+-- The MIT License (MIT)
+--
+-- Copyright (c) 2013 aiq
+--
+-- 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.
+--
+--
+--
+--------------------------------------------------------------------------------
+-- util functions
+--------------------------------------------------------------------------------
+
+local function divide_string( str, max )
+   local result = {}
+
+   local start = 1
+   for i = 1, #str do
+      if i % max == 0 then
+         table.insert( result, str:sub( start, i ) )
+         start = i + 1
+      elseif i == #str then
+         table.insert( result, str:sub( start, i ) )
+      end
+   end
+
+   return result
+end
+
+local function number_to_bit( num, length )
+   local bits = {}
+
+   while num > 0 do
+      local rest = math.floor( math.fmod( num, 2 ) )
+      table.insert( bits, rest )
+      num = ( num - rest ) / 2
+   end
+
+   while #bits < length do
+      table.insert( bits, "0" )
+   end
+
+   return string.reverse( table.concat( bits ) )
+end
+
+local function ignore_set( str, set )
+   if set then
+      str = str:gsub( "["..set.."]", "" )
+   end
+   return str
+end
+
+local function pure_from_bit( str )
+   return ( str:gsub( '........', function ( cc )
+               return string.char( tonumber( cc, 2 ) )
+            end ) )
+end
+
+local function unexpected_char_error( str, pos )
+   local c = string.sub( str, pos, pos )
+   return string.format( "unexpected character at position %d: '%s'", pos, c )
+end
+
+--------------------------------------------------------------------------------
+
+local basexx = {}
+
+--------------------------------------------------------------------------------
+-- base2(bitfield) decode and encode function
+--------------------------------------------------------------------------------
+
+local bitMap = { o = "0", i = "1", l = "1" }
+
+function basexx.from_bit( str, ignore )
+   str = ignore_set( str, ignore )
+   str = string.lower( str )
+   str = str:gsub( '[ilo]', function( c ) return bitMap[ c ] end )
+   local pos = string.find( str, "[^01]" )
+   if pos then return nil, unexpected_char_error( str, pos ) end
+
+   return pure_from_bit( str )
+end
+
+function basexx.to_bit( str )
+   return ( str:gsub( '.', function ( c )
+               local byte = string.byte( c )
+               local bits = {}
+               for _ = 1,8 do
+                  table.insert( bits, byte % 2 )
+                  byte = math.floor( byte / 2 )
+               end
+               return table.concat( bits ):reverse()
+            end ) )
+end
+
+--------------------------------------------------------------------------------
+-- base16(hex) decode and encode function
+--------------------------------------------------------------------------------
+
+function basexx.from_hex( str, ignore )
+   str = ignore_set( str, ignore )
+   local pos = string.find( str, "[^%x]" )
+   if pos then return nil, unexpected_char_error( str, pos ) end
+
+   return ( str:gsub( '..', function ( cc )
+               return string.char( tonumber( cc, 16 ) )
+            end ) )
+end
+
+function basexx.to_hex( str )
+   return ( str:gsub( '.', function ( c )
+               return string.format('%02X', string.byte( c ) )
+            end ) )
+end
+
+--------------------------------------------------------------------------------
+-- generic function to decode and encode base32/base64
+--------------------------------------------------------------------------------
+
+local function from_basexx( str, alphabet, bits )
+   local result = {}
+   for i = 1, #str do
+      local c = string.sub( str, i, i )
+      if c ~= '=' then
+         local index = string.find( alphabet, c, 1, true )
+         if not index then
+            return nil, unexpected_char_error( str, i )
+         end
+         table.insert( result, number_to_bit( index - 1, bits ) )
+      end
+   end
+
+   local value = table.concat( result )
+   local pad = #value % 8
+   return pure_from_bit( string.sub( value, 1, #value - pad ) )
+end
+
+local function to_basexx( str, alphabet, bits, pad )
+   local bitString = basexx.to_bit( str )
+
+   local chunks = divide_string( bitString, bits )
+   local result = {}
+   for _,value in ipairs( chunks ) do
+      if ( #value < bits ) then
+         value = value .. string.rep( '0', bits - #value )
+      end
+      local pos = tonumber( value, 2 ) + 1
+      table.insert( result, alphabet:sub( pos, pos ) )
+   end
+
+   table.insert( result, pad )
+   return table.concat( result )
+end
+
+--------------------------------------------------------------------------------
+-- rfc 3548: http://www.rfc-editor.org/rfc/rfc3548.txt
+--------------------------------------------------------------------------------
+
+local base32Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"
+local base32PadMap = { "", "======", "====", "===", "=" }
+
+function basexx.from_base32( str, ignore )
+   str = ignore_set( str, ignore )
+   return from_basexx( string.upper( str ), base32Alphabet, 5 )
+end
+
+function basexx.to_base32( str )
+   return to_basexx( str, base32Alphabet, 5, base32PadMap[ #str % 5 + 1 ] )
+end
+
+--------------------------------------------------------------------------------
+-- crockford: http://www.crockford.com/wrmg/base32.html
+--------------------------------------------------------------------------------
+
+local crockfordAlphabet = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"
+local crockfordMap = { O = "0", I = "1", L = "1" }
+
+function basexx.from_crockford( str, ignore )
+   str = ignore_set( str, ignore )
+   str = string.upper( str )
+   str = str:gsub( '[ILOU]', function( c ) return crockfordMap[ c ] end )
+   return from_basexx( str, crockfordAlphabet, 5 )
+end
+
+function basexx.to_crockford( str )
+   return to_basexx( str, crockfordAlphabet, 5, "" )
+end
+
+--------------------------------------------------------------------------------
+-- base64 decode and encode function
+--------------------------------------------------------------------------------
+
+local base64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"..
+                       "abcdefghijklmnopqrstuvwxyz"..
+                       "0123456789+/"
+local base64PadMap = { "", "==", "=" }
+
+function basexx.from_base64( str, ignore )
+   str = ignore_set( str, ignore )
+   return from_basexx( str, base64Alphabet, 6 )
+end
+
+function basexx.to_base64( str )
+   return to_basexx( str, base64Alphabet, 6, base64PadMap[ #str % 3 + 1 ] )
+end
+
+--------------------------------------------------------------------------------
+-- URL safe base64 decode and encode function
+--------------------------------------------------------------------------------
+
+local url64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"..
+                      "abcdefghijklmnopqrstuvwxyz"..
+                      "0123456789-_"
+
+function basexx.from_url64( str, ignore )
+   str = ignore_set( str, ignore )
+   return from_basexx( str, url64Alphabet, 6 )
+end
+
+function basexx.to_url64( str )
+   return to_basexx( str, url64Alphabet, 6, "" )
+end
+
+--------------------------------------------------------------------------------
+--
+--------------------------------------------------------------------------------
+
+local function length_error( len, d )
+   return string.format( "invalid length: %d - must be a multiple of %d", len, d )
+end
+
+local z85Decoder = { 0x00, 0x44, 0x00, 0x54, 0x53, 0x52, 0x48, 0x00,
+                     0x4B, 0x4C, 0x46, 0x41, 0x00, 0x3F, 0x3E, 0x45,
+                     0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+                     0x08, 0x09, 0x40, 0x00, 0x49, 0x42, 0x4A, 0x47,
+                     0x51, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A,
+                     0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32,
+                     0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A,
+                     0x3B, 0x3C, 0x3D, 0x4D, 0x00, 0x4E, 0x43, 0x00,
+                     0x00, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10,
+                     0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
+                     0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
+                     0x21, 0x22, 0x23, 0x4F, 0x00, 0x50, 0x00, 0x00 }
+
+function basexx.from_z85( str, ignore )
+   str = ignore_set( str, ignore )
+   if ( #str % 5 ) ~= 0 then
+      return nil, length_error( #str, 5 )
+   end
+
+   local result = {}
+
+   local value = 0
+   for i = 1, #str do
+      local index = string.byte( str, i ) - 31
+      if index < 1 or index >= #z85Decoder then
+         return nil, unexpected_char_error( str, i )
+      end
+      value = ( value * 85 ) + z85Decoder[ index ]
+      if ( i % 5 ) == 0 then
+         local divisor = 256 * 256 * 256
+         while divisor ~= 0 do
+            local b = math.floor( value / divisor ) % 256
+            table.insert( result, string.char( b ) )
+            divisor = math.floor( divisor / 256 )
+         end
+         value = 0
+      end
+   end
+
+   return table.concat( result )
+end
+
+local z85Encoder = "0123456789"..
+                   "abcdefghijklmnopqrstuvwxyz"..
+                   "ABCDEFGHIJKLMNOPQRSTUVWXYZ"..
+                   ".-:+=^!/*?&<>()[]{}@%$#"
+
+function basexx.to_z85( str )
+   if ( #str % 4 ) ~= 0 then
+      return nil, length_error( #str, 4 )
+   end
+
+   local result = {}
+
+   local value = 0
+   for i = 1, #str do
+      local b = string.byte( str, i )
+      value = ( value * 256 ) + b
+      if ( i % 4 ) == 0 then
+         local divisor = 85 * 85 * 85 * 85
+         while divisor ~= 0 do
+            local index = ( math.floor( value / divisor ) % 85 ) + 1
+            table.insert( result, z85Encoder:sub( index, index ) )
+            divisor = math.floor( divisor / 85 )
+         end
+         value = 0
+      end
+   end
+
+   return table.concat( result )
+end
+
+--------------------------------------------------------------------------------
+
+return basexx