discourse/lib/pbkdf2.rb

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# frozen_string_literal: true
# Note: This logic was originally extracted from the Pbkdf2 gem to fix Ruby 2.0
# issues, but that gem has gone stale so we won't be returning to it.
require "openssl"
require "xorcist"
class Pbkdf2
def self.hash_password(password, salt, iterations, algorithm = "sha256")
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h = OpenSSL::Digest.new(algorithm)
u = ret = prf(h, password, salt + [1].pack("N"))
2.upto(iterations) do
u = prf(h, password, u)
Xorcist.xor!(ret, u)
end
ret.bytes.map { |b| ("0" + b.to_s(16))[-2..-1] }.join("")
end
protected
def self.prf(hash_function, password, data)
OpenSSL::HMAC.digest(hash_function, password, data)
end
end