module SimpleApiAuth

# File lib/simple-api-auth.rb, line 33
def self.compute_signature(request, secret_key, options = {})
  request = SimpleApiAuth::Request.create(request)
  signer = SimpleApiAuth.config.signer.new(options)
  signer.sign(request, secret_key)
end

# File lib/simple-api-auth.rb, line 11
def self.config
  @config ||= Config.new
end

# File lib/simple-api-auth.rb, line 15
def self.configure
  yield config
end

# File lib/simple-api-auth.rb, line 23
def self.extract_key(request)
  request = SimpleApiAuth::Request.create(request)
  request.headers[SimpleApiAuth.config.header_keys[:saa_key]]
end

# File lib/simple-api-auth.rb, line 19
def self.log(severity, message = nil, progname = nil, &block)
  config.logger.log(severity, message, progname, &block) unless config.logger.nil?
end

# File lib/simple-api-auth.rb, line 39
def self.sign!(request, secret_key, options = {})
  request = SimpleApiAuth::Request.create(request)
  request.add_header(SimpleApiAuth.config.header_keys[:saa_auth_time], Time.now.utc.iso8601)
  signature = compute_signature(request, secret_key, options)
  request.add_header(SimpleApiAuth.config.header_keys[:authorization], "Signature: #{signature}")
  request.original
end

# File lib/simple-api-auth.rb, line 28
def self.valid_signature?(request, secret_key, options = {})
  authenticator = Authenticator.new(request, secret_key, options)
  authenticator.valid_signature?
end