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-rw-r--r--lib/warden/strategies/secure_remote_password.rb81
1 files changed, 81 insertions, 0 deletions
diff --git a/lib/warden/strategies/secure_remote_password.rb b/lib/warden/strategies/secure_remote_password.rb
new file mode 100644
index 0000000..2c334c6
--- /dev/null
+++ b/lib/warden/strategies/secure_remote_password.rb
@@ -0,0 +1,81 @@
+module Warden
+ module Strategies
+ class SecureRemotePassword < Warden::Strategies::Base
+
+ def valid?
+ handshake? || authentication?
+ end
+
+ def authenticate!
+ if authentication?
+ validate!
+ else # handshake
+ initialize!
+ end
+ end
+
+ protected
+
+ def handshake?
+ params['A'] && params['login']
+ end
+
+ def authentication?
+ params['client_auth'] && session[:handshake]
+ end
+
+ def validate!
+ if client = validate
+ success!(User.find_by_login(client.username))
+ else
+ Rails.logger.warn "Login attempt failed."
+ Rails.logger.debug debug_info
+ Rails.logger.debug "Received: #{params['client_auth']}"
+ session.delete(:handshake)
+ fail!(:base => "invalid_user_pass")
+ end
+ end
+
+ def validate
+ session[:handshake].authenticate(params['client_auth'])
+ end
+
+ def initialize!
+ if user = User.find_by_login(id)
+ client = SRP::Client.new user.username,
+ :verifier => user.verifier,
+ :salt => user.salt
+ session[:handshake] = SRP::Session.new(client, params['A'])
+ custom! json_response(session[:handshake])
+ else
+ fail! :base => 'invalid_user_pass'
+ end
+ rescue SRP::InvalidEphemeral
+ fail!(:base => "invalid_ephemeral")
+ end
+
+ def json_response(object)
+ [ 200,
+ {"Content-Type" => "application/json; charset=utf-8"},
+ [object.to_json]
+ ]
+ end
+
+ def id
+ params["id"] || params["login"]
+ end
+
+ protected
+
+ def debug_info
+ JSON.pretty_generate(session[:handshake].internal_state)
+ end
+
+ end
+ end
+ Warden::Strategies.add :secure_remote_password,
+ Warden::Strategies::SecureRemotePassword
+
+end
+
+