mirror of
https://github.com/phpseclib/phpseclib.git
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Merge remote-tracking branch 'origin/petrich'
This commit is contained in:
terrafrost
commit
5e882d57fe
@ -6,4 +6,4 @@ php:
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- 5.4
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script:
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- phpunit
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- phpunit --verbose
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@ -387,7 +387,7 @@ class Crypt_Rijndael {
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* @var String
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* @access private
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*/
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var $enbuffer = array('encrypted' => '', 'xor' => '');
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var $enbuffer = array('encrypted' => '', 'xor' => '', 'pos' => 0);
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/**
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* Decryption buffer for CTR, OFB and CFB modes
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@ -396,7 +396,7 @@ class Crypt_Rijndael {
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* @var String
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* @access private
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*/
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var $debuffer = array('ciphertext' => '');
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var $debuffer = array('ciphertext' => '', 'xor' => '', 'pos' => 0);
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/**
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* Default Constructor.
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@ -763,42 +763,54 @@ class Crypt_Rijndael {
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}
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break;
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case CRYPT_RIJNDAEL_MODE_CFB:
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if (strlen($buffer['xor'])) {
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$ciphertext = $plaintext ^ $buffer['xor'];
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$iv = $buffer['encrypted'] . $ciphertext;
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$start = strlen($ciphertext);
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$buffer['encrypted'].= $ciphertext;
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$buffer['xor'] = substr($buffer['xor'], strlen($ciphertext));
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} else {
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$ciphertext = '';
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// cfb loosely routines inspired by openssl's:
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// http://cvs.openssl.org/fileview?f=openssl/crypto/modes/cfb128.c&v=1.3.2.2.2.1
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$iv = $this->encryptIV;
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$start = 0;
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$pos = $this->continuousBuffer === true ? $buffer['pos'] : 0;
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$len = strlen($plaintext);
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if ($pos) {
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$orig_pos = $pos;
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$max = $block_size - $pos;
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if ($len >= $max) {
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$i = $max;
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$len-= $max;
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$pos = 0;
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} else {
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$i = $len;
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$pos+= $len;
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$len = 0;
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}
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for ($i = $start; $i < strlen($plaintext); $i+=$block_size) {
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$block = substr($plaintext, $i, $block_size);
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$xor = $this->_encryptBlock($iv);
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$iv = $block ^ $xor;
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if ($continuousBuffer && strlen($iv) != $block_size) {
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$buffer = array(
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'encrypted' => $iv,
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'xor' => substr($xor, strlen($iv))
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);
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// ie. $i = min($max, $len), $len-= $i, $pos+= $i
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$ciphertext = substr($iv, $orig_pos) ^ $plaintext;
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$iv = substr_replace($iv, $ciphertext, $orig_pos, $i);
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}
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while ($len >= $block_size) {
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$iv = $this->_encryptBlock($iv) ^ substr($plaintext, $i, $block_size);
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$ciphertext.= $iv;
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$len-= $block_size;
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$i+= $block_size;
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}
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if ($this->continuousBuffer) {
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if ($len) {
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$iv = $this->_encryptBlock($iv);
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//$block = substr($iv, $pos, $len) ^ substr($plaintext, $i, $len);
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$block = substr($iv, $pos) ^ substr($plaintext, $i);
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$iv = substr_replace($iv, $block, $pos, $len);
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$ciphertext.= $block;
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$i+= $len;
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$pos+= $len;
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}
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if($this->continuousBuffer) {
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$this->encryptIV = $iv;
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$buffer['pos'] = $pos;
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}
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break;
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case CRYPT_RIJNDAEL_MODE_OFB:
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$xor = $this->encryptIV;
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if (strlen($buffer)) {
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if (strlen($buffer['xor'])) {
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for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
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$xor = $this->_encryptBlock($xor);
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$buffer.= $xor;
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$key = $this->_string_shift($buffer, $block_size);
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$buffer['xor'].= $xor;
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$key = $this->_string_shift($buffer['xor'], $block_size);
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$ciphertext.= substr($plaintext, $i, $block_size) ^ $key;
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}
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} else {
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@ -811,7 +823,7 @@ class Crypt_Rijndael {
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if ($this->continuousBuffer) {
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$this->encryptIV = $xor;
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if ($start = strlen($plaintext) % $block_size) {
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$buffer = substr($key, $start) . $buffer;
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$buffer['xor'] = substr($key, $start) . $buffer['xor'];
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}
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}
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}
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@ -879,49 +891,58 @@ class Crypt_Rijndael {
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if ($this->continuousBuffer) {
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$this->decryptIV = $xor;
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if ($start = strlen($ciphertext) % $block_size) {
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$buffer['ciphertext'] = substr($key, $start) . $buffer['encrypted'];
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$buffer['ciphertext'] = substr($key, $start) . $buffer['ciphertext'];
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}
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}
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break;
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case CRYPT_RIJNDAEL_MODE_CFB:
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if (strlen($buffer['ciphertext'])) {
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$plaintext = $ciphertext ^ substr($this->decryptIV, strlen($buffer['ciphertext']));
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$buffer['ciphertext'].= substr($ciphertext, 0, strlen($plaintext));
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if (strlen($buffer['ciphertext']) != $block_size) {
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$block = $this->decryptIV;
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} else {
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$block = $buffer['ciphertext'];
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$xor = $this->_encryptBlock($buffer['ciphertext']);
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$buffer['ciphertext'] = '';
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}
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$start = strlen($plaintext);
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} else {
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$plaintext = '';
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$xor = $this->_encryptBlock($this->decryptIV);
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$start = 0;
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}
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$iv = $this->decryptIV;
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$pos = $this->continuousBuffer === true ? $buffer['pos'] : 0;
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$len = strlen($ciphertext);
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for ($i = $start; $i < strlen($ciphertext); $i+=$block_size) {
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$block = substr($ciphertext, $i, $block_size);
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$plaintext.= $block ^ $xor;
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if ($continuousBuffer && strlen($block) != $block_size) {
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$buffer['ciphertext'].= $block;
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$block = $xor;
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} else if (strlen($block) == $block_size) {
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$xor = $this->_encryptBlock($block);
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if ($pos) {
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$orig_pos = $pos;
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$max = $block_size - $pos;
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if ($len >= $max) {
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$i = $max;
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$len-= $max;
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$pos = 0;
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} else {
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$i = $len;
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$pos+= $len;
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$len = 0;
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}
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// ie. $i = min($max, $len), $len-= $i, $pos+= $i
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$plaintext = substr($iv, $orig_pos) ^ $ciphertext;
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$iv = substr_replace($iv, $ciphertext, $orig_pos, $i);
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}
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while ($len >= $block_size) {
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$iv = $this->_encryptBlock($iv);
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$cb = substr($ciphertext, $i, $block_size);
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$plaintext.= $iv ^ $cb;
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$iv = $cb;
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$len-= $block_size;
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$i+= $block_size;
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}
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if ($len) {
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$iv = $this->_encryptBlock($iv);
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$plaintext.= substr($iv, $pos) ^ substr($ciphertext, $i);
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$iv = substr_replace($iv, substr($ciphertext, $i, $len), $pos, $len);
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$i+= $len;
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$pos+= $len;
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}
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if ($this->continuousBuffer) {
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$this->decryptIV = $block;
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$this->decryptIV = $iv;
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$buffer['pos'] = $pos;
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}
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break;
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case CRYPT_RIJNDAEL_MODE_OFB:
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$xor = $this->decryptIV;
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if (strlen($buffer)) {
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if (strlen($buffer['xor'])) {
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for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
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$xor = $this->_encryptBlock($xor);
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$buffer.= $xor;
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$key = $this->_string_shift($buffer, $block_size);
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$buffer['xor'].= $xor;
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$key = $this->_string_shift($buffer['xor'], $block_size);
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$plaintext.= substr($ciphertext, $i, $block_size) ^ $key;
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}
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} else {
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@ -934,7 +955,7 @@ class Crypt_Rijndael {
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if ($this->continuousBuffer) {
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$this->decryptIV = $xor;
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if ($start = strlen($ciphertext) % $block_size) {
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$buffer = substr($key, $start) . $buffer;
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$buffer['xor'] = substr($key, $start) . $buffer['xor'];
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}
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}
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}
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@ -1456,6 +1477,8 @@ class Crypt_Rijndael {
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$this->continuousBuffer = false;
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$this->encryptIV = $this->iv;
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$this->decryptIV = $this->iv;
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$this->enbuffer = array('encrypted' => '', 'xor' => '', 'pos' => 0);
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$this->debuffer = array('ciphertext' => '', 'xor' => '', 'pos' => 0);
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}
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/**
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@ -9,14 +9,34 @@
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// class files of phpseclib require() other dependencies.
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set_include_path(implode(PATH_SEPARATOR, array(
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dirname(__FILE__) . '/../phpseclib/',
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dirname(__FILE__) . '/',
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get_include_path(),
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)));
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function phpseclib_is_includable($suffix)
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{
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foreach (explode(PATH_SEPARATOR, get_include_path()) as $prefix)
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{
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$ds = substr($prefix, -1) == DIRECTORY_SEPARATOR ? '' : DIRECTORY_SEPARATOR;
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$file = $prefix . $ds . $suffix;
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if (file_exists($file))
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{
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return true;
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}
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}
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return false;
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}
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function phpseclib_autoload($class)
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{
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$file = str_replace('_', '/', $class) . '.php';
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if (phpseclib_is_includable($file))
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{
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require $file;
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}
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}
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spl_autoload_register('phpseclib_autoload');
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