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require 'em-http'
#
# used to fetch an array of KeyInfo objects that match the given uid.
#
module Nickserver; module HKP
class FetchKeyInfo
include EM::Deferrable
# for this regexp to work, the source text must end in a trailing "\n",
# which the output of sks does.
MATCH_PUB_KEY = /(^pub:.+?\n(^uid:.+?\n)+)/m
def search(uid)
# in practice, exact=on seems to have no effect
params = {:op => 'vindex', :search => uid, :exact => 'on', :options => 'mr', :fingerprint => 'on'}
EventMachine::HttpRequest.new(Config.hkp_url).get(:query => params).callback {|http|
if http.response_header.status != 200
self.fail http.response_header.status
else
self.succeed parse(uid, http.response)
end
}.errback {|http|
self.fail http.error
}
self
end
#
# input:
# uid -- uid to search for
# vindex_result -- raw output from a vindex hkp query (machine readable)
#
# returns:
# an array of eligible keys (as HKPKeyInfo objects) matching uid.
#
# keys are eliminated from eligibility for a number of reasons, including expiration,
# revocation, uid match, key length, and so on...
#
def parse(uid, vindex_result)
keys = []
now = Time.now
vindex_result.scan(MATCH_PUB_KEY).each do |match|
key_info = KeyInfo.new(match[0])
if key_info.uids.include?(uid)
if key_info.keylen <= 1024
#puts 'key length is too short'
elsif key_info.expired?
#puts 'ignoring expired key'
elsif key_info.revoked?
#puts 'ignoring revoked key'
elsif key_info.disabled?
#puts 'ignoring disabled key'
elsif key_info.expirationdate && key_info.expirationdate < now
#puts 'ignoring expired key'
else
keys << key_info
end
end
end
keys
end
end
end; end
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