From d4ec5161fed6cb84888fed39983c67a3b1270e4a Mon Sep 17 00:00:00 2001
From: Jamie R <jamie@blacktraffic.co.uk>
Date: Sun, 24 Nov 2019 15:00:13 +0000
Subject: [PATCH] add web2py pbkdf2-hmac-sha512 variant

---
 tools/test_modules/m21600.pm | 70 ++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 tools/test_modules/m21600.pm

diff --git a/tools/test_modules/m21600.pm b/tools/test_modules/m21600.pm
new file mode 100644
index 000000000..0a805e97d
--- /dev/null
+++ b/tools/test_modules/m21600.pm
@@ -0,0 +1,70 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use MIME::Base64 qw (encode_base64 decode_base64);
+use Crypt::PBKDF2;
+
+sub module_constraints { [[0, 256], [1, 15], [-1, -1], [-1, -1], [-1, -1]] }
+
+#pbkdf2(1000,20,sha512)$a2a2ca127df6bc19$77bb5a3d129e2ce710daaefeefef8356c4c827ff";
+
+sub module_generate_hash
+{
+  my $word       = shift;
+  my $salt       = shift;
+  my $iterations = shift // 1000;
+  my $out_len    = shift // 16;
+
+  my $pbkdf2 = Crypt::PBKDF2->new
+  (
+    hasher     => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 512),
+    iterations => $iterations,
+    output_len => $out_len
+  );
+
+  my $digest = $pbkdf2->PBKDF2 ($salt, $word);
+  my $digest_hex = unpack "H*", $digest;
+
+  my $hash = sprintf ('pbkdf2(%i,20,sha512)$%s$%s', $iterations, $salt, $digest_hex);
+
+  return $hash;
+}
+
+#pbkdf2(1000,20,sha512)$a2a2ca127df6bc19$77bb5a3d129e2ce710daaefeefef8356c4c827ff";
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($digest, $word) = split (/:([^:]+)$/, $line);
+
+  return unless defined $digest;
+  return unless defined $word;
+
+  my ($intro, $salt, $hash_encoded) = split ('$', $digest);
+  my ($signature, $iterations, $len, $prf) = split (m/[\(\),]/, $digest);
+
+  return unless ($signature eq 'pbkdf2');
+  return unless ($prf eq 'sha512');
+  return unless defined $iterations;
+  return unless defined $hash_encoded;
+
+  my $hash = pack 'H*',$hash_encoded;
+
+  my $out_len = length ($hash);
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt, $iterations, $out_len);
+
+  return ($new_hash, $word);
+}
+
+1;