Class: Keybase::Crypto

Inherits:
Object
  • Object
show all
Defined in:
lib/keybase/crypto.rb

Constant Summary collapse

SCRYPT_VARS = 
{'N' => 2**15, 'r' => 8, 'p' => 1, 'key_length' => 224, 'chunk' => 192..-1}

Class Method Summary collapse

Class Method Details

.hex2bin(hex) ⇒ Object 



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# File 'lib/keybase/crypto.rb', line 16

def self.hex2bin(hex)
  [hex].pack("H*")
end

.hmac_sha512(key, data) ⇒ Object 



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# File 'lib/keybase/crypto.rb', line 12

def self.hmac_sha512(key, data)
  OpenSSL::HMAC.hexdigest(OpenSSL::Digest::SHA512.new, key, Base64.decode64(data))
end

.scrypt(passphrase, salt) ⇒ Object 



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# File 'lib/keybase/crypto.rb', line 5

def self.scrypt(passphrase, salt)
  SCrypt::Engine.scrypt(passphrase, hex2bin(salt),
                               SCRYPT_VARS['N'], SCRYPT_VARS['r'],
                               SCRYPT_VARS['p'], SCRYPT_VARS['key_length']
                             )[SCRYPT_VARS['chunk']]
end