90 lines
2.2 KiB
Ruby
90 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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class SSHPublicKey
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Technology = Struct.new(:name, :key_class, :supported_sizes)
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TECHNOLOGIES = [
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Technology.new(:rsa, OpenSSL::PKey::RSA, [1024, 2048, 3072, 4096]),
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Technology.new(:dsa, OpenSSL::PKey::DSA, [1024, 2048, 3072]),
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Technology.new(:ecdsa, OpenSSL::PKey::EC, [256, 384, 521]),
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Technology.new(:ed25519, Net::SSH::Authentication::ED25519::PubKey, [256])
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].freeze
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def self.technology(name)
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TECHNOLOGIES.find { |tech| tech.name.to_s == name.to_s }
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end
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def self.technology_for_key(key)
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TECHNOLOGIES.find { |tech| key.is_a?(tech.key_class) }
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end
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def self.supported_sizes(name)
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technology(name)&.supported_sizes
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end
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def self.sanitize(key_content)
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ssh_type, *parts = key_content.strip.split
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return key_content if parts.empty?
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parts.each_with_object(+"#{ssh_type} ").with_index do |(part, content), index|
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content << part
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if Gitlab::SSHPublicKey.new(content).valid?
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break [content, parts[index + 1]].compact.join(' ') # Add the comment part if present
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elsif parts.size == index + 1 # return original content if we've reached the last element
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break key_content
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end
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end
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end
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attr_reader :key_text, :key
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# Unqualified MD5 fingerprint for compatibility
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delegate :fingerprint, to: :key, allow_nil: true
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def initialize(key_text)
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@key_text = key_text
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@key =
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begin
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Net::SSH::KeyFactory.load_data_public_key(key_text)
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rescue StandardError, NotImplementedError
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end
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end
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def valid?
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SSHKey.valid_ssh_public_key?(key_text)
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end
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def type
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technology.name if key.present?
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end
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def bits
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return if key.blank?
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case type
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when :rsa
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key.n&.num_bits
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when :dsa
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key.p&.num_bits
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when :ecdsa
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key.group.order&.num_bits
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when :ed25519
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256
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else
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raise "Unsupported key type: #{type}"
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end
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end
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private
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def technology
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@technology ||=
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self.class.technology_for_key(key) || raise("Unsupported key type: #{key.class}")
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end
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end
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end
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