nilsteampassnet /
TeamPass
| @@ 655-706 (lines=52) @@ | ||
| 652 | * |
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| 653 | * @return boolean |
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| 654 | */ |
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| 655 | private function expandKey128() |
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| 656 | { |
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| 657 | // clear the xkey, we're creating a new one |
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| 658 | $this->xkey = ""; |
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| 659 | $max = 0; |
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| 660 | ||
| 661 | // the number of rounds we make depends on the block size of the text |
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| 662 | // used during encryption/decryption |
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| 663 | if ($this->blockSize() == 16) { |
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| 664 | $max = 44; |
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| 665 | } |
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| 666 | if ($this->blockSize() == 24) { |
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| 667 | $max = 78; |
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| 668 | } |
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| 669 | if ($this->blockSize() == 32) { |
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| 670 | $max = 120; |
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| 671 | } |
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| 672 | ||
| 673 | // 16 byte key expands to 176 bytes |
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| 674 | for ($i = 0; $i < $max; ++$i) |
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| 675 | { |
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| 676 | if ($i >= 0 && $i <= 3) { |
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| 677 | $this->xkey .= $this->k($i * 4); |
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| 678 | } else if (($i % 4) == 0) |
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| 679 | { |
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| 680 | // rotate the 4 bytes |
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| 681 | $subword = $this->rotWord($this->ek(($i - 1) * 4)); |
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| 682 | ||
| 683 | // apply the sbox |
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| 684 | $this->subWord($subword); |
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| 685 | ||
| 686 | // return 4 byte value based on self::$_rcon table |
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| 687 | //$rcon = $this->rcon(($i / 4) - 1); |
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| 688 | $rcon = $this->rcon(($i / 4)); |
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| 689 | ||
| 690 | // grab 4 bytes from $this->extended_key |
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| 691 | $ek = $this->ek(($i - 4) * 4); |
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| 692 | ||
| 693 | $h1 = parent::str2Hex($subword); |
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| 694 | $h2 = parent::dec2Hex($rcon); |
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| 695 | $h3 = parent::str2Hex($ek); |
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| 696 | $res = parent::xorHex($h1, $h2, $h3); |
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| 697 | $this->xkey .= parent::hex2Str($res); |
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| 698 | } else |
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| 699 | { |
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| 700 | $h1 = parent::str2Hex($this->ek(($i - 1) * 4)); |
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| 701 | $h2 = parent::str2Hex($this->ek(($i - 4) * 4)); |
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| 702 | $res = parent::xorHex($h1, $h2); |
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| 703 | $this->xkey .= parent::hex2Str($res); |
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| 704 | } |
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| 705 | } |
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| 706 | ||
| 707 | return true; |
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| 708 | } |
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| 709 | ||
| @@ 717-768 (lines=52) @@ | ||
| 714 | * |
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| 715 | * @return boolean |
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| 716 | */ |
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| 717 | private function expandKey192() |
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| 718 | { |
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| 719 | // clear the xkey, we're creating a new one |
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| 720 | $this->xkey = ""; |
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| 721 | $max = 0; |
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| 722 | ||
| 723 | // the number of rounds we make depends on the block size of the text |
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| 724 | // used during encryption/decryption |
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| 725 | if ($this->blockSize() == 16) { |
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| 726 | $max = 52; |
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| 727 | } |
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| 728 | if ($this->blockSize() == 24) { |
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| 729 | $max = 78; |
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| 730 | } |
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| 731 | if ($this->blockSize() == 32) { |
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| 732 | $max = 120; |
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| 733 | } |
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| 734 | ||
| 735 | // 24 byte key expands to 208 bytes |
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| 736 | for ($i = 0; $i < $max; ++$i) |
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| 737 | { |
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| 738 | if ($i >= 0 && $i <= 5) { |
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| 739 | $this->xkey .= $this->k($i * 4); |
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| 740 | } else if (($i % 6) == 0) |
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| 741 | { |
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| 742 | // rotate the 4 bytes |
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| 743 | $subword = $this->rotWord($this->ek(($i - 1) * 4)); |
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| 744 | ||
| 745 | // apply the sbox |
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| 746 | $this->subWord($subword); |
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| 747 | ||
| 748 | // return 4 byte value based on self::$_rcon table |
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| 749 | //$rcon = $this->rcon(($i / 6) - 1); |
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| 750 | $rcon = $this->rcon(($i / 6)); |
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| 751 | ||
| 752 | // grab 4 bytes from $this->extended_key |
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| 753 | $ek = $this->ek(($i - 6) * 4); |
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| 754 | ||
| 755 | $h1 = parent::str2Hex($subword); |
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| 756 | $h2 = parent::dec2Hex($rcon); |
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| 757 | $h3 = parent::str2Hex($ek); |
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| 758 | $res = parent::xorHex($h1, $h2, $h3); |
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| 759 | $this->xkey .= parent::hex2Str($res); |
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| 760 | } else |
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| 761 | { |
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| 762 | $h1 = parent::str2Hex($this->ek(($i - 1) * 4)); |
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| 763 | $h2 = parent::str2Hex($this->ek(($i - 6) * 4)); |
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| 764 | $res = parent::xorHex($h1, $h2); |
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| 765 | $this->xkey .= parent::hex2Str($res); |
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| 766 | } |
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| 767 | } |
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| 768 | ||
| 769 | return true; |
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| 770 | } |
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| 771 | ||
