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module Gitlab
class KeyFingerprint
attr_reader :key, :ssh_key
# Unqualified MD5 fingerprint for compatibility
delegate :fingerprint, to: :ssh_key, allow_nil: true
def initialize(key)
@key = key
@ssh_key =
begin
Net::SSH::KeyFactory.load_data_public_key(key)
rescue Net::SSH::Exception, NotImplementedError
end
end
def valid?
ssh_key.present?
end
def type
return unless valid?
parts = ssh_key.ssh_type.split('-')
parts.shift if parts[0] == 'ssh'
parts[0].upcase
end
def bits
return unless valid?
case type
when 'RSA'
ssh_key.n.num_bits
when 'DSS', 'DSA'
ssh_key.p.num_bits
when 'ECDSA'
ssh_key.group.order.num_bits
when 'ED25519'
256
else
raise "Unsupported key type: #{type}"
end
end
end
end
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