Class: Authmac::HmacChecker

Inherits:
Object
  • Object
show all
Defined in:
lib/authmac/hmac_checker.rb

Instance Method Summary collapse

Constructor Details

#initialize(secret, message_format: :values, parameter_separator: '|', digest_function: 'sha1') ⇒ HmacChecker

Returns a new instance of HmacChecker.

Parameters:

  • message_format (symbol) (defaults to: :values) —

    ‘:values` or `:json`. `:json` will use a sorted json string to sign. `:values` will use the sorted values separated by `parameter_separator` to sign.



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# File 'lib/authmac/hmac_checker.rb', line 8

def initialize(secret, message_format: :values,
                       parameter_separator: '|',
                       digest_function: 'sha1')
  @secret = secret
  @digest = digest_function
  @separator = parameter_separator
  @message_format = message_format
  fail Authmac::SecretError, 'secret too short, see rfc2104' unless @secret.bytes.size >= digester.digest_length * 2
end

Instance Method Details

#sign(hash) ⇒ Object 



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# File 'lib/authmac/hmac_checker.rb', line 22

def sign(hash)
  OpenSSL::HMAC.hexdigest(digester, @secret, message_string(hash))
end

#validate(hash, given_hmac) ⇒ Object 



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# File 'lib/authmac/hmac_checker.rb', line 18

def validate(hash, given_hmac)
  sign(hash) == given_hmac
end

#with_signature(hash, hmac_key = :hmac) ⇒ Object 



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# File 'lib/authmac/hmac_checker.rb', line 26

def with_signature(hash, hmac_key = :hmac)
  hash.merge({hmac_key => sign(hash)})
end