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#-------------------------------------------------------------------------
# # Copyright (c) Microsoft and contributors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#--------------------------------------------------------------------------
require 'cgi'
require 'azure/core/auth/signer'
module Azure
module Core
module Auth
class SharedKey < Signer
# The Azure account's name.
attr :account_name
# Initialize the Signer.
#
# @param account_name [String] The account name. Defaults to the one in the
# global configuration.
# @param access_key [String] The access_key encoded in Base64. Defaults to the
# one in the global configuration.
def initialize(account_name=Azure.storage_account_name, access_key=Azure.storage_access_key)
@account_name = account_name
super(access_key)
end
# The name of the strategy.
#
# @return [String]
def name
'SharedKey'
end
# Create the signature for the request parameters
#
# @param method [Symbol] HTTP request method.
# @param uri [URI] URI of the request we're signing.
# @param headers [Hash] HTTP request headers.
#
# @return [String] base64 encoded signature
def sign(method, uri, headers)
"#{account_name}:#{super(signable_string(method, uri, headers))}"
end
# Sign the request
#
# @param req [Azure::Core::Http::HttpRequest] HTTP request to sign
#
# @return [Azure::Core::Http::HttpRequest]
def sign_request(req)
# Need to make sure Content-Length is correctly set.
if ((!req.body.nil?)) then
if (req.body.respond_to? :bytesize) then
req.headers['Content-Length'] = req.body.bytesize.to_s
elsif (req.body.respond_to? :size)
req.headers['Content-Length'] = req.body.size.to_s
end
end
req.headers['Authorization'] = "#{name} #{sign(req.method, req.uri, req.headers)}"
req
end
# Generate the string to sign.
#
# @param method [Symbol] HTTP request method.
# @param uri [URI] URI of the request we're signing.
# @param headers [Hash] HTTP request headers.
#
# @return [String]
def signable_string(method, uri, headers)
[
method.to_s.upcase,
headers.fetch('Content-Encoding', ''),
headers.fetch('Content-Language', ''),
headers.fetch('Content-Length', ''),
headers.fetch('Content-MD5', ''),
headers.fetch('Content-Type', ''),
headers.fetch('Date', ''),
headers.fetch('If-Modified-Since', ''),
headers.fetch('If-Match', ''),
headers.fetch('If-None-Match', ''),
headers.fetch('If-Unmodified-Since', ''),
headers.fetch('Range', ''),
canonicalized_headers(headers),
canonicalized_resource(uri)
].join("\n")
end
# Calculate the Canonicalized Headers string for a request.
#
# @param headers [Hash] HTTP request headers.
#
# @return [String] a string with the canonicalized headers.
def canonicalized_headers(headers)
headers = headers.map { |k,v| [k.to_s.downcase, v] }
headers.select! { |k,_| k =~ /^x-ms-/ }
headers.sort_by! { |(k,_)| k }
headers.map! { |k,v| '%s:%s' % [k, v] }.join("\n")
end
# Calculate the Canonicalized Resource string for a request.
#
# @param uri [URI] URI of the request we're signing.
#
# @return [String] a string with the canonicalized resource.
def canonicalized_resource(uri)
resource = '/' + account_name + (uri.path.empty? ? '/' : uri.path)
params = CGI.parse(uri.query.to_s).map { |k,v| [k.downcase, v] }
params.sort_by! { |k,_| k }
params.map! { |k,v| '%s:%s' % [k, v.map(&:strip).sort.join(',')] }
[resource, *params].join("\n")
end
end
end
end
end
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