141 lines
3.1 KiB
Ruby
141 lines
3.1 KiB
Ruby
class SingleSignOn
|
|
|
|
class ParseError < RuntimeError; end
|
|
|
|
ACCESSORS = %i{
|
|
add_groups
|
|
admin moderator
|
|
avatar_force_update
|
|
avatar_url
|
|
bio
|
|
card_background_url
|
|
email
|
|
external_id
|
|
groups
|
|
locale
|
|
locale_force_update
|
|
name
|
|
nonce
|
|
profile_background_url
|
|
remove_groups
|
|
require_activation
|
|
return_sso_url
|
|
suppress_welcome_message
|
|
title
|
|
username
|
|
website
|
|
}
|
|
|
|
FIXNUMS = []
|
|
|
|
BOOLS = %i{
|
|
admin
|
|
avatar_force_update
|
|
locale_force_update
|
|
moderator
|
|
require_activation
|
|
suppress_welcome_message
|
|
}
|
|
|
|
def self.nonce_expiry_time
|
|
@nonce_expiry_time ||= 10.minutes
|
|
end
|
|
|
|
def self.nonce_expiry_time=(v)
|
|
@nonce_expiry_time = v
|
|
end
|
|
|
|
attr_accessor(*ACCESSORS)
|
|
attr_writer :sso_secret, :sso_url
|
|
|
|
def self.sso_secret
|
|
raise RuntimeError, "sso_secret not implemented on class, be sure to set it on instance"
|
|
end
|
|
|
|
def self.sso_url
|
|
raise RuntimeError, "sso_url not implemented on class, be sure to set it on instance"
|
|
end
|
|
|
|
def self.parse(payload, sso_secret = nil)
|
|
sso = new
|
|
sso.sso_secret = sso_secret if sso_secret
|
|
|
|
parsed = Rack::Utils.parse_query(payload)
|
|
decoded = Base64.decode64(parsed["sso"])
|
|
decoded_hash = Rack::Utils.parse_query(decoded)
|
|
|
|
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 ParseError, "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 ParseError, "Bad signature for payload #{diags}"
|
|
end
|
|
end
|
|
|
|
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.public_send("#{k}=", val)
|
|
end
|
|
|
|
decoded_hash.each do |k, v|
|
|
if field = k[/^custom\.(.+)$/, 1]
|
|
sso.custom_fields[field] = v
|
|
end
|
|
end
|
|
|
|
sso
|
|
end
|
|
|
|
def diagnostics
|
|
SingleSignOn::ACCESSORS.map { |a| "#{a}: #{public_send(a)}" }.join("\n")
|
|
end
|
|
|
|
def sso_secret
|
|
@sso_secret || self.class.sso_secret
|
|
end
|
|
|
|
def sso_url
|
|
@sso_url || self.class.sso_url
|
|
end
|
|
|
|
def custom_fields
|
|
@custom_fields ||= {}
|
|
end
|
|
|
|
def sign(payload, secret = nil)
|
|
secret = secret || sso_secret
|
|
OpenSSL::HMAC.hexdigest("sha256", secret, payload)
|
|
end
|
|
|
|
def to_url(base_url = nil)
|
|
base = "#{base_url || sso_url}"
|
|
"#{base}#{base.include?('?') ? '&' : '?'}#{payload}"
|
|
end
|
|
|
|
def payload(secret = nil)
|
|
payload = Base64.strict_encode64(unsigned_payload)
|
|
"sso=#{CGI::escape(payload)}&sig=#{sign(payload, secret)}"
|
|
end
|
|
|
|
def unsigned_payload
|
|
payload = {}
|
|
|
|
ACCESSORS.each do |k|
|
|
next if (val = public_send(k)) == nil
|
|
payload[k] = val
|
|
end
|
|
|
|
@custom_fields&.each do |k, v|
|
|
payload["custom.#{k}"] = v.to_s
|
|
end
|
|
|
|
Rack::Utils.build_query(payload)
|
|
end
|
|
|
|
end
|