Class: Amazon::Coral::V0SignatureHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/amazon/coral/v0signaturehelper.rb

Overview

Performs AWS V0 Signatures on QueryStringMap objects.

Instance Method Summary collapse

Constructor Details

#initialize(aws_access_key_id, aws_secret_key) ⇒ V0SignatureHelper

Returns a new instance of V0SignatureHelper.



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# File 'lib/amazon/coral/v0signaturehelper.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

Instance Method Details

#add_fields(query_string_map, time) ⇒ Object 



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# File 'lib/amazon/coral/v0signaturehelper.rb', line 70

def add_fields(query_string_map, time)
  query_string_map['AWSAccessKeyId'] = @aws_access_key_id
  query_string_map['SignatureVersion'] = '0'
  query_string_map['SignatureMethod'] = 'HmacSHA1'
  query_string_map['Timestamp'] = time.to_s
end

#canonicalize(args) ⇒ Object 



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# File 'lib/amazon/coral/v0signaturehelper.rb', line 28

def canonicalize(args)
  query_string_map = args[:query_string_map]

  service_name = query_string_map['ServiceName']
  action = query_string_map['Action']
  operation = query_string_map['Operation']
  timestamp = query_string_map['Timestamp']
  expires = query_string_map['Expires']
  credential = query_string_map['Credential']

  canonical = ''

  canonical << service_name unless service_name.nil?

  if !action.nil? then
    canonical << action
  elsif !operation.nil? then
    canonical << operation
  else
    raise 'Query string must contain Action or Operation'
  end
  
  if timestamp.nil? and expires.nil? then
    raise 'Query string must contain Timestamp or Expires'
  elsif !timestamp.nil? and !expires.nil? then
    raise 'Query string may contain only one of Timestamp or Expires'
  elsif !timestamp.nil? then
    canonical << timestamp
  else
    canonical << expires
  end

  canonical << credential unless credential.nil?

  return canonical
end

#compute_signature(canonical) ⇒ Object 



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# File 'lib/amazon/coral/v0signaturehelper.rb', line 65

def compute_signature(canonical)
  digest = OpenSSL::Digest::Digest.new('sha1')
  return Base64.encode64(OpenSSL::HMAC.digest(digest, @aws_secret_key, canonical)).strip
end

#sign(args) ⇒ Object 



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# File 'lib/amazon/coral/v0signaturehelper.rb', line 18

def sign(args)
  signT(Time.now.iso8601, args)
end

#signT(time, args) ⇒ Object 



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# File 'lib/amazon/coral/v0signaturehelper.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) ⇒ Object 



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# File 'lib/amazon/coral/v0signaturehelper.rb', line 77

def sort(hash)
  hash.sort { |a,b| a[0].downcase <=> b[0].downcase }
end