class Amazon::Coral::V2SignatureHelper
Performs AWS
V2 signatures on QueryStringMap
objects.
Public Class Methods
new(aws_access_key_id, aws_secret_key)
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# File lib/amazon/coral/v2signaturehelper.rb, line 13 def initialize(aws_access_key_id, aws_secret_key) @aws_access_key_id = aws_access_key_id.to_s @aws_secret_key = aws_secret_key.to_s end
Public Instance Methods
add_fields(query_string_map, time)
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# File lib/amazon/coral/v2signaturehelper.rb, line 62 def add_fields(query_string_map, time) query_string_map['AWSAccessKeyId'] = @aws_access_key_id query_string_map['SignatureVersion'] = '2' query_string_map['SignatureMethod'] = 'HmacSHA256' query_string_map['Timestamp'] = time.to_s end
canonicalize(args)
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# File lib/amazon/coral/v2signaturehelper.rb, line 28 def canonicalize(args) query_string_map = args[:query_string_map] uri = args[:uri] verb = args[:verb] host = args[:host].downcase # exclude any existing Signature parameter from the canonical string sorted = sort(query_string_map.reject { |k, v| k == 'Signature' }) canonical = "#{verb}\n#{host}\n#{uri}\n" isFirst = true sorted.each { |v| if(isFirst) then isFirst = false else canonical << '&' end canonical << UrlEncoding.encode(v[0]) unless(v[1].nil?) then canonical << '=' canonical << UrlEncoding.encode(v[1]) end } return canonical end
compute_signature(canonical)
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# File lib/amazon/coral/v2signaturehelper.rb, line 57 def compute_signature(canonical) digest = OpenSSL::Digest::Digest.new('sha256') return Base64.encode64(OpenSSL::HMAC.digest(digest, @aws_secret_key, canonical)).strip end
sign(args)
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# File lib/amazon/coral/v2signaturehelper.rb, line 18 def sign(args) signT(Time.now.iso8601, args) end
signT(time, args)
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# File lib/amazon/coral/v2signaturehelper.rb, line 22 def signT(time, args) query_string_map = args[:query_string_map] add_fields(query_string_map, time) query_string_map['Signature'] = compute_signature(canonicalize(args)) end
sort(hash)
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# File lib/amazon/coral/v2signaturehelper.rb, line 69 def sort(hash) hash.sort end