Sha256: a07d36f3ad1ddce0e693a122146af0d8a2206e61dc2b0423e606c029fc673adc
Contents?: true
Size: 816 Bytes
Versions: 6
Compression:
Stored size: 816 Bytes
Contents
module Yubikey::ModHex
TRANS = 'cbdefghijklnrtuv'.split(//)
# Decode a ModHex string into binary data
def self.decode(modhex_string)
out = ''
flag = true # to switch between first and last nibble
byte = 0
raise ArgumentError, "ModHex string length is not even" unless modhex_string.length % 2 == 0
modhex_string.each_byte do |b|
x = TRANS.index(b.chr) # lookup occurrence in table
if flag
byte = x
else
byte = (byte << 4) | x
out <<= byte.chr
end
flag = !flag
end
out
end
# Encode a binary string into ModHex
def self.encode(string)
out = ''
string.each_byte do |b|
out <<= TRANS[(b >> 4) & 0xF]
out <<= TRANS[b & 0xF]
end
out
end
end # Yubikey::ModHex
Version data entries
6 entries across 6 versions & 2 rubygems