argon2

test.rb

require 'fiddle/import'

module Test
  extend Fiddle::Importer
  dlload '/usr/lib/libargon2.so.1'

  typealias 'uint8_t', 'unsigned char'
  typealias 'uint32_t', 'unsigned int'
  
  Argon2_Context = struct [
    'uint8_t *out',       # output array
    'uint32_t outlen',    # digest length
    'uint8_t *pwd',       # password array
    'uint32_t pwdlen',    # password len
    'uint8_t *salt',      # salt array
    'uint32_t saltlen',   # salt length
    'uint8_t *secret',    # key array
    'uint32_t secretlen', # key length
    'uint8_t *ad',        # associated data array
    'uint32_t adlen',     # associated data length
    'uint32_t t_cost',    # number of iterations
    'uint32_t m_cost',    # amount of memory requested (KB)
    'uint32_t lanes',     # number of lanes
    'uint32_t threads',   # maximum number of threads
    'uint32_t version',   # version number
    'void **allocate_cbk',
    'void *free_cbk',
    'uint32_t flags'      # array of bool options
  ]

  extern 'int argon2i_ctx(Argon2_Context *context)'
  extern 'int argon2i_verify_ctx(Argon2_Context *context, const char *hash)'
end

hash = [''].pack('a128')
hashlen = hash.bytesize
pwd = 'password'
pwdlen = pwd.bytesize
secret = "i am a secret"
secretlen = secret.bytesize
salt = 'salty soy sauce'
saltlen = salt.bytesize
t_cost = 8
m_cost = 1 << 16
parallelism = 2

argon2_context = Test::Argon2_Context.malloc

argon2_context.out = hash
argon2_context.outlen = hashlen
argon2_context.pwd = pwd
argon2_context.pwdlen = pwdlen
argon2_context.salt = salt
argon2_context.saltlen = saltlen
argon2_context.secret = secret
argon2_context.secretlen = secretlen
argon2_context.ad = nil
argon2_context.adlen = 0
argon2_context.t_cost = t_cost
argon2_context.m_cost = m_cost
argon2_context.lanes = parallelism
argon2_context.threads = parallelism
argon2_context.version = 0x13
argon2_context.allocate_cbk = Fiddle::NULL
argon2_context.free_cbk = Fiddle::NULL
argon2_context.flags = 0

p Test.argon2i_ctx(argon2_context)
p argon2_context.out.to_s
p Test.argon2i_verify_ctx(argon2_context, argon2_context.out)