Calculate the length of the encoded hash.

Translate the error code to an error message.

Hash a password using Argon2.

Hash a password using Argon2.

Configurable parameters

The following three parameters can be set in the config file:

• t_cost - time cost

  • the amount of computation, given in number of iterations
  • 6 is the default

• m_cost - memory usage

  • 16 is the default - this will produce a memory usage of 2 ^ 16 KiB (64 MiB)

• parallelism - number of parallel threads

  • 1 is the default

If you are hashing passwords in your tests, it can be useful to add the following to the config/test.exs file:

config :argon2_elixir,
  t_cost: 2,
  m_cost: 12

NB. do not use these values in production.

Options

There are six options (t_cost, m_cost and parallelism can be used to override the values set in the config):

• t_cost - time cost
• m_cost - memory usage
• parallelism - number of parallel threads

• format - output format

  • this value can be

    • :encoded - encoded with Argon2 crypt format
    • :raw_hash - raw hash output in hexadecimal format
    • :report - raw hash and encoded hash, together with the options used
  • :encoded is the default

• hashlen - length of the hash (in bytes)

  • the default is 32

• argon2_type - Argon2 type

  • this value should be 0 (Argon2d), 1 (Argon2i) or 2 (Argon2id)
  • the default is 1 (Argon2i)

Verify a password using Argon2.