Class: HSign::Digest

Inherits:
Object show all
Defined in:
lib/hsign/digest.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(secret, salt = nil) ⇒ Digest

Returns a new instance of Digest.



10
11
12
13
14
15
 
# File 'lib/hsign/digest.rb', line 10

def initialize(secret, salt = nil)
  @digest = OpenSSL::Digest.new('sha1')
  @hmac_key = '_hmac'
  @secret = secret
  @salt = salt
end

Instance Attribute Details

#hmac_key ⇒ Object

Returns the value of attribute hmac_key.



7
8
9
 
# File 'lib/hsign/digest.rb', line 7

def hmac_key
  @hmac_key
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



8
9
10
 
# File 'lib/hsign/digest.rb', line 8

def params
  @params
end

Instance Method Details

#each_param(&block) ⇒ Object 



36
37
38
39
 
# File 'lib/hsign/digest.rb', line 36

def each_param &block
  return false unless @params
  @params.each(&block)
end

#sign(request_params) ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
 
# File 'lib/hsign/digest.rb', line 17

def sign(request_params)
  hmac = OpenSSL::HMAC.new @secret, @digest
  hmac << @salt if @salt
  # Normalize all params
  @params = Rack::Utils.parse_query(Rack::Utils.build_nested_query(request_params.to_hsign_string_values))
  @params.delete(hmac_key)

  @params.to_a.sort_by{|k,v| k.to_s}.each do |k,v|
    hmac << "#{k}=#{v}"
  end

  @params[hmac_key] =  hmac.hexdigest
end

#verify?(params) ⇒ Boolean

Returns:

  • (Boolean) 


31
32
33
34
 
# File 'lib/hsign/digest.rb', line 31

def verify?(params)
  expected = params.delete(hmac_key)
  expected == sign(params)
end