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72 lines
1.3 KiB
72 lines
1.3 KiB
#!/usr/bin/env perl
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##
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## Author......: See docs/credits.txt
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## License.....: MIT
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##
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use strict;
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use warnings;
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use Digest::SHA;
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sub salt_to_state
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{
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my $salt = shift;
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my @tmp = unpack("(A8)*", $salt);
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my $state = sprintf 'alg:256
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H:%s
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block:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
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blockcnt:0
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lenhh:0
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lenhl:0
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lenlh:0
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lenll:0', join(":", @tmp);
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return $state
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}
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sub module_constraints { [[0, 256], [64, 64], [0, 55], [64, 64], [-1, -1]] }
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sub module_generate_hash
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{
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my $word = shift;
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my $salt = shift;
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my $sha256_ctx = Digest::SHA->new (256);
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$sha256_ctx->putstate (salt_to_state ($salt));
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$sha256_ctx->add ($word);
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my $digest = $sha256_ctx->hexdigest();
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my $hash = sprintf ("sha256:%s:%s", $digest, $salt);
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return $hash;
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}
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sub module_verify_hash
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{
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my $line = shift;
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my ($signature, $digest, $salt, $word) = split (':', $line);
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return unless defined $signature;
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return unless defined $digest;
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return unless defined $salt;
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return unless defined $word;
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return unless ($signature eq "sha256");
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $salt);
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return ($new_hash, $word);
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}
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1;
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