72 lines
1.6 KiB
Ruby
72 lines
1.6 KiB
Ruby
class SingleSignOn
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ACCESSORS = [:nonce, :name, :username, :email, :about_me, :external_email, :external_username, :external_name, :external_id]
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FIXNUMS = []
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NONCE_EXPIRY_TIME = 10.minutes
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attr_accessor(*ACCESSORS)
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attr_accessor :sso_secret, :sso_url
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def self.sso_secret
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raise RuntimeError, "sso_secret not implemented on class, be sure to set it on instance"
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end
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def self.sso_url
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raise RuntimeError, "sso_url not implemented on class, be sure to set it on instance"
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end
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def sso_secret
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@sso_secret || self.class.sso_secret
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end
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def sso_url
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@sso_url || self.class.sso_url
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end
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def self.parse(payload, sso_secret = nil)
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sso = new
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sso.sso_secret = sso_secret if sso_secret
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parsed = Rack::Utils.parse_query(payload)
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if sso.sign(parsed["sso"]) != parsed["sig"]
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raise RuntimeError, "Bad signature for payload"
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end
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decoded = Base64.decode64(parsed["sso"])
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decoded_hash = Rack::Utils.parse_query(decoded)
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ACCESSORS.each do |k|
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val = decoded_hash[k.to_s]
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val = val.to_i if FIXNUMS.include? k
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sso.send("#{k}=", val)
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end
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sso
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end
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def sign(payload)
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OpenSSL::HMAC.hexdigest("sha256", sso_secret, payload)
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end
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def to_url(base_url=nil)
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base = "#{base_url || sso_url}"
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"#{base}#{base.include?('?') ? '&' : '?'}#{payload}"
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end
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def payload
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payload = Base64.encode64(unsigned_payload)
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"sso=#{CGI::escape(payload)}&sig=#{sign(payload)}"
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end
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def unsigned_payload
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payload = {}
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ACCESSORS.each do |k|
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next unless (val = send k)
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payload[k] = val
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end
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Rack::Utils.build_query(payload)
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end
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end
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