diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/vendor/rack-1.0/rack/auth/digest/md5.rb')
-rw-r--r-- | actionpack/lib/action_dispatch/vendor/rack-1.0/rack/auth/digest/md5.rb | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/auth/digest/md5.rb b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/auth/digest/md5.rb new file mode 100644 index 0000000000..e579dc9632 --- /dev/null +++ b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/auth/digest/md5.rb @@ -0,0 +1,124 @@ +require 'rack/auth/abstract/handler' +require 'rack/auth/digest/request' +require 'rack/auth/digest/params' +require 'rack/auth/digest/nonce' +require 'digest/md5' + +module Rack + module Auth + module Digest + # Rack::Auth::Digest::MD5 implements the MD5 algorithm version of + # HTTP Digest Authentication, as per RFC 2617. + # + # Initialize with the [Rack] application that you want protecting, + # and a block that looks up a plaintext password for a given username. + # + # +opaque+ needs to be set to a constant base64/hexadecimal string. + # + class MD5 < AbstractHandler + + attr_accessor :opaque + + attr_writer :passwords_hashed + + def initialize(*args) + super + @passwords_hashed = nil + end + + def passwords_hashed? + !!@passwords_hashed + end + + def call(env) + auth = Request.new(env) + + unless auth.provided? + return unauthorized + end + + if !auth.digest? || !auth.correct_uri? || !valid_qop?(auth) + return bad_request + end + + if valid?(auth) + if auth.nonce.stale? + return unauthorized(challenge(:stale => true)) + else + env['REMOTE_USER'] = auth.username + + return @app.call(env) + end + end + + unauthorized + end + + + private + + QOP = 'auth'.freeze + + def params(hash = {}) + Params.new do |params| + params['realm'] = realm + params['nonce'] = Nonce.new.to_s + params['opaque'] = H(opaque) + params['qop'] = QOP + + hash.each { |k, v| params[k] = v } + end + end + + def challenge(hash = {}) + "Digest #{params(hash)}" + end + + def valid?(auth) + valid_opaque?(auth) && valid_nonce?(auth) && valid_digest?(auth) + end + + def valid_qop?(auth) + QOP == auth.qop + end + + def valid_opaque?(auth) + H(opaque) == auth.opaque + end + + def valid_nonce?(auth) + auth.nonce.valid? + end + + def valid_digest?(auth) + digest(auth, @authenticator.call(auth.username)) == auth.response + end + + def md5(data) + ::Digest::MD5.hexdigest(data) + end + + alias :H :md5 + + def KD(secret, data) + H([secret, data] * ':') + end + + def A1(auth, password) + [ auth.username, auth.realm, password ] * ':' + end + + def A2(auth) + [ auth.method, auth.uri ] * ':' + end + + def digest(auth, password) + password_hash = passwords_hashed? ? password : H(A1(auth, password)) + + KD(password_hash, [ auth.nonce, auth.nc, auth.cnonce, QOP, H(A2(auth)) ] * ':') + end + + end + end + end +end |