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108 lines
2.9 KiB
108 lines
2.9 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 Crypt::PBKDF2;
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sub module_constraints { [[0, 256], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
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sub to64
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{
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my $v = shift;
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my $n = shift;
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my $itoa64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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my $ret = "";
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while (($n - 1) >= 0)
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{
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$n = $n - 1;
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$ret .= substr ($itoa64, $v & 0x3f, 1);
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$v = $v >> 6;
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}
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return $ret
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}
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sub aix_ssha1_pbkdf2
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{
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my $word_buf = shift;
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my $salt_buf = shift;
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my $iterations = shift;
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my $hasher = Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA1');
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my $pbkdf2 = Crypt::PBKDF2->new (
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hasher => $hasher,
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iterations => $iterations,
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);
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my $hash_buf = $pbkdf2->PBKDF2 ($salt_buf, $word_buf);
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my $tmp_hash = "";
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$tmp_hash .= to64 ((int (ord (substr ($hash_buf, 0, 1))) << 16) | (int (ord (substr ($hash_buf, 1, 1))) << 8) | (int (ord (substr ($hash_buf, 2, 1)))), 4);
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$tmp_hash .= to64 ((int (ord (substr ($hash_buf, 3, 1))) << 16) | (int (ord (substr ($hash_buf, 4, 1))) << 8) | (int (ord (substr ($hash_buf, 5, 1)))), 4);
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$tmp_hash .= to64 ((int (ord (substr ($hash_buf, 6, 1))) << 16) | (int (ord (substr ($hash_buf, 7, 1))) << 8) | (int (ord (substr ($hash_buf, 8, 1)))), 4);
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$tmp_hash .= to64 ((int (ord (substr ($hash_buf, 9, 1))) << 16) | (int (ord (substr ($hash_buf, 10, 1))) << 8) | (int (ord (substr ($hash_buf, 11, 1)))), 4);
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$tmp_hash .= to64 ((int (ord (substr ($hash_buf, 12, 1))) << 16) | (int (ord (substr ($hash_buf, 13, 1))) << 8) | (int (ord (substr ($hash_buf, 14, 1)))), 4);
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$tmp_hash .= to64 ((int (ord (substr ($hash_buf, 15, 1))) << 16) | (int (ord (substr ($hash_buf, 16, 1))) << 8) | (int (ord (substr ($hash_buf, 17, 1)))), 4);
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$tmp_hash .= to64 ((int (ord (substr ($hash_buf, 18, 1))) << 16) | (int (ord (substr ($hash_buf, 19, 1))) << 8) , 3);
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return $tmp_hash;
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}
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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 $iter = shift // 64;
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my $hash_buf = aix_ssha1_pbkdf2 ($word, $salt, $iter);
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my $hash = sprintf ("{ssha1}%02i\$%s\$%s", log ($iter) / log (2), $salt, $hash_buf);
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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 $index1 = index ($line, ":");
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my $hash_in = substr ($line, 0, $index1);
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return if $index1 < 1;
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my $word = substr ($line, $index1 + 1);
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my $index2 = index ($hash_in, "}");
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my $index3 = index ($hash_in, "\$");
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my $index4 = rindex ($hash_in, "\$");
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my $salt = substr ($hash_in, $index3 + 1, $index4 - $index3 - 1);
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my $iter = substr ($hash_in, $index2 + 1, $index3 - $index2 - 1);
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return unless defined $salt;
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return unless defined $word;
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return unless defined $iter;
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$word = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word, $salt, 1 << int ($iter));
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return ($new_hash, $word);
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}
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1;
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