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Crypt_Base: openssl_(en|de)crypt's parameters changed in PHP 5.4.0

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This commit is contained in:
terrafrost 2014-11-29 09:48:45 -06:00
parent 8fc4f4b70c
commit 8476ae6383
1 changed files with 40 additions and 17 deletions
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57
phpseclib/Crypt/Base.php
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@ -464,6 +464,15 @@ class Crypt_Base
*/ */
var $openssl_emulate_ctr = false; var $openssl_emulate_ctr = false;
/**
* Determines what options are passed to openssl_encrypt/decrypt
*
* @see Crypt_Base::isValidEngine()
* @var mixed
* @access private
*/
var $openssl_options;
/** /**
* Default Constructor. * Default Constructor.
* *
@ -683,14 +692,16 @@ class Crypt_Base
} }
switch ($this->mode) { switch ($this->mode) {
case CRYPT_MODE_STREAM: case CRYPT_MODE_STREAM:
return openssl_encrypt($plaintext, $this->cipher_name_openssl, $this->key, $this->openssl_options);
case CRYPT_MODE_ECB: case CRYPT_MODE_ECB:
return openssl_encrypt($plaintext, $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING); $result = openssl_encrypt($plaintext, $this->cipher_name_openssl, $this->key, $this->openssl_options);
return !defined('OPENSSL_RAW_DATA') ? substr($result, 0, -$this->block_size) : $result;
case CRYPT_MODE_CBC: case CRYPT_MODE_CBC:
$ciphertext = openssl_encrypt($plaintext, $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $this->encryptIV); $ciphertext = openssl_encrypt($plaintext, $this->cipher_name_openssl, $this->key, $this->openssl_options, $this->encryptIV);
if ($this->continuousBuffer) { if ($this->continuousBuffer) {
$this->encryptIV = substr($ciphertext, -$this->block_size); $this->encryptIV = substr($ciphertext, -$this->block_size);
} }
return $ciphertext; return !defined('OPENSSL_RAW_DATA') ? substr($result, 0, -$this->block_size) : $result;
case CRYPT_MODE_CTR: case CRYPT_MODE_CTR:
return $this->_openssl_ctr_process($plaintext, $this->encryptIV, $this->enbuffer); return $this->_openssl_ctr_process($plaintext, $this->encryptIV, $this->enbuffer);
case CRYPT_MODE_CFB: case CRYPT_MODE_CFB:
@ -726,7 +737,7 @@ class Crypt_Base
$overflow = $len % $this->block_size; $overflow = $len % $this->block_size;
if ($overflow) { if ($overflow) {
$ciphertext.= openssl_encrypt(substr($plaintext, 0, -$overflow) . str_repeat("\0", $this->block_size), $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv); $ciphertext.= openssl_encrypt(substr($plaintext, 0, -$overflow) . str_repeat("\0", $this->block_size), $this->cipher_name_openssl, $this->key, $this->openssl_options, $iv);
$iv = $this->_string_pop($ciphertext, $this->block_size); $iv = $this->_string_pop($ciphertext, $this->block_size);
$size = $len - $overflow; $size = $len - $overflow;
@ -735,7 +746,7 @@ class Crypt_Base
$ciphertext.= $block; $ciphertext.= $block;
$pos = $overflow; $pos = $overflow;
} else if ($len) { } else if ($len) {
$ciphertext = openssl_encrypt($plaintext, $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv); $ciphertext = openssl_encrypt($plaintext, $this->cipher_name_openssl, $this->key, $this->openssl_options, $iv);
$iv = substr($ciphertext, -$this->block_size); $iv = substr($ciphertext, -$this->block_size);
} }
@ -980,10 +991,10 @@ class Crypt_Base
switch ($this->mode) { switch ($this->mode) {
case CRYPT_MODE_STREAM: case CRYPT_MODE_STREAM:
case CRYPT_MODE_ECB: case CRYPT_MODE_ECB:
$plaintext = openssl_decrypt($ciphertext, $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING); $plaintext = openssl_decrypt($ciphertext, $this->cipher_name_openssl, $this->key, $this->openssl_options);
break; break;
case CRYPT_MODE_CBC: case CRYPT_MODE_CBC:
$plaintext = openssl_decrypt($ciphertext, $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $this->decryptIV); $plaintext = openssl_decrypt($ciphertext, $this->cipher_name_openssl, $this->key, $this->openssl_options, $this->decryptIV);
if ($this->continuousBuffer) { if ($this->continuousBuffer) {
$this->decryptIV = substr($ciphertext, -$this->block_size); $this->decryptIV = substr($ciphertext, -$this->block_size);
} }
@ -1022,16 +1033,16 @@ class Crypt_Base
} }
$overflow = $len % $this->block_size; $overflow = $len % $this->block_size;
if ($overflow) { if ($overflow) {
$plaintext.= openssl_decrypt(substr($ciphertext, 0, -$overflow), $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv); $plaintext.= openssl_decrypt(substr($ciphertext, 0, -$overflow), $this->cipher_name_openssl, $this->key, $this->openssl_options, $iv);
if ($len - $overflow) { if ($len - $overflow) {
$iv = substr($ciphertext, -$overflow - $this->block_size, -$overflow); $iv = substr($ciphertext, -$overflow - $this->block_size, -$overflow);
} }
$iv = openssl_encrypt(str_repeat("\0", $this->block_size), $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv); $iv = openssl_encrypt(str_repeat("\0", $this->block_size), $this->cipher_name_openssl, $this->key, $this->openssl_options, $iv);
$plaintext.= $iv ^ substr($ciphertext, -$overflow); $plaintext.= $iv ^ substr($ciphertext, -$overflow);
$iv = substr_replace($iv, substr($ciphertext, -$overflow), 0, $overflow); $iv = substr_replace($iv, substr($ciphertext, -$overflow), 0, $overflow);
$pos = $overflow; $pos = $overflow;
} else if ($len) { } else if ($len) {
$plaintext.= openssl_decrypt($ciphertext, $this->cipher_name_openssl, $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv); $plaintext.= openssl_decrypt($ciphertext, $this->cipher_name_openssl, $this->key, $this->openssl_options, $iv);
$iv = substr($ciphertext, -$this->block_size); $iv = substr($ciphertext, -$this->block_size);
} }
break; break;
@ -1266,7 +1277,9 @@ class Crypt_Base
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
$block = substr($plaintext, $i, $block_size); $block = substr($plaintext, $i, $block_size);
if (strlen($block) > strlen($buffer['encrypted'])) { if (strlen($block) > strlen($buffer['encrypted'])) {
$buffer['encrypted'].= openssl_encrypt($xor, $this->cipher_name_openssl_ecb, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING); $result = openssl_encrypt($xor, $this->cipher_name_openssl_ecb, $key, $this->openssl_options);
$result = !defined('OPENSSL_RAW_DATA') ? substr($result, 0, -$this->block_size) : $result;
$buffer['encrypted'].= $result;
} }
$this->_increment_str($xor); $this->_increment_str($xor);
$otp = $this->_string_shift($buffer['encrypted'], $block_size); $otp = $this->_string_shift($buffer['encrypted'], $block_size);
@ -1275,7 +1288,8 @@ class Crypt_Base
} else { } else {
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) { for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
$block = substr($plaintext, $i, $block_size); $block = substr($plaintext, $i, $block_size);
$otp = openssl_encrypt($xor, $this->cipher_name_openssl_ecb, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING); $otp = openssl_encrypt($xor, $this->cipher_name_openssl_ecb, $key, $this->openssl_options);
$otp = !defined('OPENSSL_RAW_DATA') ? substr($otp, 0, -$this->block_size) : $otp;
$this->_increment_str($xor); $this->_increment_str($xor);
$ciphertext.= $block ^ $otp; $ciphertext.= $block ^ $otp;
} }
@ -1302,15 +1316,15 @@ class Crypt_Base
$overflow = strlen($plaintext) % $block_size; $overflow = strlen($plaintext) % $block_size;
if ($overflow) { if ($overflow) {
$plaintext2 = $this->_string_pop($plaintext, $overflow); // ie. trim $plaintext to a multiple of $block_size and put rest of $plaintext in $plaintext2 $plaintext2 = $this->_string_pop($plaintext, $overflow); // ie. trim $plaintext to a multiple of $block_size and put rest of $plaintext in $plaintext2
$encrypted = openssl_encrypt($plaintext . str_repeat("\0", $block_size), $this->cipher_name_openssl, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $encryptIV); $encrypted = openssl_encrypt($plaintext . str_repeat("\0", $block_size), $this->cipher_name_openssl, $key, $this->openssl_options, $encryptIV);
$encryptIV = $this->_string_pop($encrypted, $block_size); $encryptIV = $this->_string_pop($encrypted, $block_size);
$ciphertext.= $encrypted . ($plaintext2 ^ $encryptIV); $ciphertext.= $encrypted . ($plaintext2 ^ $encryptIV);
$buffer['encrypted'] = substr($encryptIV, $overflow); $buffer['encrypted'] = substr($encryptIV, $overflow);
} else if (!strlen($buffer['encrypted'])) { } else if (!strlen($buffer['encrypted'])) {
$ciphertext.= openssl_encrypt($plaintext . str_repeat("\0", $block_size), $this->cipher_name_openssl, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $encryptIV); $ciphertext.= openssl_encrypt($plaintext . str_repeat("\0", $block_size), $this->cipher_name_openssl, $key, $this->openssl_options, $encryptIV);
$encryptIV = $this->_string_pop($ciphertext, $block_size); $encryptIV = $this->_string_pop($ciphertext, $block_size);
} }
$encryptIV = openssl_decrypt($encryptIV, $this->cipher_name_openssl_ecb, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING); $encryptIV = openssl_decrypt($encryptIV, $this->cipher_name_openssl_ecb, $key, $this->openssl_options);
if ($overflow) { if ($overflow) {
$this->_increment_str($encryptIV); $this->_increment_str($encryptIV);
} }
@ -1351,7 +1365,7 @@ class Crypt_Base
if (strlen($plaintext)) { if (strlen($plaintext)) {
if ($overflow) { if ($overflow) {
$ciphertext.= openssl_encrypt(substr($plaintext, 0, -$overflow) . str_repeat("\0", $block_size), $this->cipher_name_openssl, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $encryptIV); $ciphertext.= openssl_encrypt(substr($plaintext, 0, -$overflow) . str_repeat("\0", $block_size), $this->cipher_name_openssl, $key, $this->openssl_options, $encryptIV);
$xor = $this->_string_pop($ciphertext, $block_size); $xor = $this->_string_pop($ciphertext, $block_size);
if ($this->continuousBuffer) { if ($this->continuousBuffer) {
$encryptIV = $xor; $encryptIV = $xor;
@ -1361,7 +1375,7 @@ class Crypt_Base
$buffer['xor'] = $xor; $buffer['xor'] = $xor;
} }
} else { } else {
$ciphertext = openssl_encrypt($plaintext, $this->cipher_name_openssl, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $encryptIV); $ciphertext = openssl_encrypt($plaintext, $this->cipher_name_openssl, $key, $this->openssl_options, $encryptIV);
if ($this->continuousBuffer) { if ($this->continuousBuffer) {
$encryptIV = substr($ciphertext, -$block_size) ^ substr($plaintext, -$block_size); $encryptIV = substr($ciphertext, -$block_size) ^ substr($plaintext, -$block_size);
} }
@ -1514,6 +1528,15 @@ class Crypt_Base
if (!$result) { if (!$result) {
return false; return false;
} }
// prior to PHP 5.4.0 OPENSSL_RAW_DATA and OPENSSL_ZERO_PADDING were not defined. instead of expecting an integer
// $options openssl_encrypt expected a boolean $raw_data.
if (!defined('OPENSSL_RAW_DATA')) {
$this->openssl_options = true;
} else {
$this->openssl_options = OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING;
}
$methods = openssl_get_cipher_methods(); $methods = openssl_get_cipher_methods();
if (in_array($this->cipher_name_openssl, $methods)) { if (in_array($this->cipher_name_openssl, $methods)) {
return true; return true;