55 lines
1.4 KiB
Elixir
55 lines
1.4 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Password.Pbkdf2 do
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@moduledoc """
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This module implements Pbkdf2 passwords in terms of Plug.Crypto.
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"""
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alias Plug.Crypto.KeyGenerator
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def decode64(str) do
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str
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|> String.replace(".", "+")
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|> Base.decode64!(padding: false)
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end
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def encode64(bin) do
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bin
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|> Base.encode64(padding: false)
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|> String.replace("+", ".")
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end
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def verify_pass(password, hash) do
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["pbkdf2-" <> digest, iterations, salt, hash] = String.split(hash, "$", trim: true)
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salt = decode64(salt)
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iterations = String.to_integer(iterations)
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digest = String.to_atom(digest)
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binary_hash =
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KeyGenerator.generate(password, salt, digest: digest, iterations: iterations, length: 64)
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encode64(binary_hash) == hash
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end
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def hash_pwd_salt(password, opts \\ []) do
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salt =
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Keyword.get_lazy(opts, :salt, fn ->
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:crypto.strong_rand_bytes(16)
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end)
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digest = Keyword.get(opts, :digest, :sha512)
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iterations =
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Keyword.get(opts, :iterations, Pleroma.Config.get([:password, :iterations], 160_000))
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binary_hash =
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KeyGenerator.generate(password, salt, digest: digest, iterations: iterations, length: 64)
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"$pbkdf2-#{digest}$#{iterations}$#{encode64(salt)}$#{encode64(binary_hash)}"
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end
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end
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