class DiscourseMountableSso::SingleSignOn

Constants

ACCESSORS
BOOLS
FIXNUMS
NONCE_EXPIRY_TIME

Attributes

sso_secret[RW]
sso_url[RW]

Public Class Methods

parse(payload, sso_secret = nil) click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 20
def self.parse(payload, sso_secret = nil)
  sso = new
  sso.sso_secret = sso_secret if sso_secret

  parsed = Rack::Utils.parse_query(payload)
  if sso.sign(parsed["sso"]) != parsed["sig"]
    diags = "\n\nsso: #{parsed["sso"]}\n\nsig: #{parsed["sig"]}\n\nexpected sig: #{sso.sign(parsed["sso"])}"
    if parsed["sso"] =~ /[^a-zA-Z0-9=\r\n\/+]/m
      raise RuntimeError, "The SSO field should be Base64 encoded, using only A-Z, a-z, 0-9, +, /, and = characters. Your input contains characters we don't understand as Base64, see http://en.wikipedia.org/wiki/Base64 #{diags}"
    else
      raise RuntimeError, "Bad signature for payload #{diags}"
    end
  end

  decoded = Base64.decode64(parsed["sso"])
  decoded_hash = Rack::Utils.parse_query(decoded)

  ACCESSORS.each do |k|
    val = decoded_hash[k.to_s]
    val = val.to_i if FIXNUMS.include? k
    if BOOLS.include? k
      val = ["true", "false"].include?(val) ? val == "true" : nil
    end
    sso.send("#{k}=", val)
  end

  decoded_hash.each do |k,v|
    # 1234567
    # custom.
    #
    if k[0..6] == "custom."
      field = k[7..-1]
      sso.custom_fields[field] = v
    end
  end

  sso
end
sso_secret() click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 12
def self.sso_secret
  raise RuntimeError, "sso_secret not implemented on class, be sure to set it on instance"
end
sso_url() click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 16
def self.sso_url
  raise RuntimeError, "sso_url not implemented on class, be sure to set it on instance"
end

Public Instance Methods

custom_fields() click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 67
def custom_fields
  @custom_fields ||= {}
end
payload() click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 82
def payload
  payload = Base64.encode64(unsigned_payload)
  "sso=#{CGI::escape(payload)}&sig=#{sign(payload)}"
end
sign(payload) click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 72
def sign(payload)
  OpenSSL::HMAC.hexdigest("sha256", sso_secret, payload)
end
to_url(base_url=nil) click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 77
def to_url(base_url=nil)
  base = "#{base_url || sso_url}"
  "#{base}#{base.include?('?') ? '&' : '?'}#{payload}"
end
unsigned_payload() click to toggle source
# File lib/discourse_mountable_sso/single_sign_on.rb, line 87
def unsigned_payload
  payload = {}
  ACCESSORS.each do |k|
   next if (val = send k) == nil

   payload[k] = val
  end

  if @custom_fields
    @custom_fields.each do |k,v|
      payload["custom.#{k}"] = v.to_s
    end
  end

  Rack::Utils.build_query(payload)
end