The Challenge class handlers the WWW-Authenticate header. The WWW-Authenticate header is sent by a server when accessing a resource without credentials is prohibided. The header should always be sent together with a 401 status.
See the Digest module for examples
Parses the information from a WWW-Authenticate header and creates a new WWW-Authenticate instance with this data.
challenge: The contents of a WWW-Authenticate header
See initialize for valid options.
# File lib/httpauth/digest.rb, line 417 def self.from_header(challenge, options={}) new Utils.decode_directives(challenge, :challenge), options end
Create a new instance.
h: A Hash with directives, normally this is filled with directives coming from a Challenge instance.
options: Use to set of override data from the WWW-Authenticate header
:realm: The name of the realm the client should authenticate for. The RFC suggests to use a string like 'admin@yourhost.domain.com'. Be sure to use a reasonably long string to avoid brute force attacks.
:qop: A list with supported qop values. For example: ['auth-int']. This will default to ['auth']. Although this implementation supports both auth and auth-int, most implementations don't. Some implementations get confused when they receive anything but 'auth'. For maximum compatibility you should leave this setting alone.
:algorithm: The preferred algorithm for calculating the digest. For example: 'MD5-sess'. This will default to 'MD5'. For maximum compatibility you should leave this setting alone.
# File lib/httpauth/digest.rb, line 435 def initialize(h, options={}) @h = h @h.merge! options end
Encodes directives and returns a string that can be used as the WWW-Authenticate header
# File lib/httpauth/digest.rb, line 441 def to_header @h[:nonce] ||= Utils.create_nonce @h[:salt] @h[:opaque] ||= Utils.create_opaque @h[:algorithm] ||= HTTPAuth::PREFERRED_ALGORITHM @h[:qop] ||= [HTTPAuth::PREFERRED_QOP] Utils.encode_directives Utils.filter_h_on(@h, [:realm, :domain, :nonce, :opaque, :stale, :algorithm, :qop]), :challenge end
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