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|
require 'cgi'
require 'nickserver/hkp'
module Nickserver::Hkp
#
# Class to represent the key information result from a query to a key server
# (but not the key itself).
#
# The initialize method parses the hkp 'machine readable' output.
#
# format definition of machine readable index output is here:
# http://tools.ietf.org/html/draft-shaw-openpgp-hkp-00#section-5.2
#
class KeyInfo
attr_accessor :uids
def initialize(hkp_record)
uid_lines = hkp_record.split("\n")
pub_line = uid_lines.shift
@properties = pub_line.split(':')[1..-1]
@uids = extract_uids(uid_lines)
end
CHECKS = %i[too_short? expired? revoked? disabled? outdated?].freeze
def error
CHECKS.find do |check|
msg = check.to_s.chop.tr('_', ' ')
"key is #{msg}." if send(check)
end
end
def keyid
properties.first
end
def algo
properties.second
end
def keylen
properties[2].to_i
end
def creationdate
created = properties[3]
Time.at(created.to_i)
end
def expirationdate
expires = properties[4]
expires && Time.at(expires.to_i)
end
def flags
properties.last
end
def rsa?
algo == '1'
end
def dsa?
algo == '17'
end
protected
attr_reader :properties
def extract_uids(uid_lines)
uid_lines.map do |uid_line|
# for now, ignore the expirationdate and flags of uids.
# sks does return them anyway
uid, _creationdate, _expirationdate, _flags = uid_line.split(':')[1..-1]
CGI.unescape(uid.sub(/.*<(.+)>.*/, '\1'))
end
end
# CHECKS
def too_short?
keylen < 2048
end
def expired?
flags =~ /e/
end
def revoked?
flags =~ /r/
end
def disabled?
flags =~ /d/
end
def outdated?
expirationdate && expirationdate < Time.now
end
end
end
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