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# frozen_string_literal: true
# SshKeyValidator
#
# Custom validator for SSH keys.
#
# class Project < ActiveRecord::Base
# validates :key, ssh_key: true
# end
#
class SshKeyValidator < ActiveModel::EachValidator # rubocop:disable Gitlab/NamespacedClass -- Allow setting ssh_key by convention
def validate_each(record, attribute, value)
public_key = Gitlab::SSHPublicKey.new(value)
restriction = Gitlab::CurrentSettings.key_restriction_for(public_key.type)
if restriction == ApplicationSetting::FORBIDDEN_KEY_VALUE
record.errors.add(attribute, forbidden_key_type_message)
elsif public_key.bits < restriction
record.errors.add(attribute, "must be at least #{restriction} bits")
end
end
private
def forbidden_key_type_message
allowed_types = Gitlab::CurrentSettings.allowed_key_types.map(&:upcase)
"type is forbidden. Must be #{Gitlab::Sentence.to_exclusive_sentence(allowed_types)}"
end
end
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