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Source Code

# File net/ssh/host-key-verifier.rb, line 8
def verify(arguments)
  host = canonize(arguments[:peer])
  matches = Net::SSH::KnownHosts.search_for(host)

  # we've never seen this host before, so just automatically add the key.
  # not the most secure option (since the first hit might be the one that
  # is hacked), but since almost nobody actually compares the key
  # fingerprint, this is a reasonable compromise between usability and
  # security.
  if matches.empty?
    Net::SSH::KnownHosts.add(host, arguments[:key])
    return true
  end

  # If we found any matches, check to see that the key type and
  # blob also match.
  found = matches.any? do |key|
    key.ssh_type == arguments[:key].ssh_type &&
    key.to_blob  == arguments[:key].to_blob
  end

  # If a match was found, return true. Otherwise, raise an exception
  # indicating that the key was not recognized.
  found || process_cache_miss(host, arguments)
end