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Pure-PHP implementation of Rijndael. Uses mcrypt, if available/possible, and an internal implementation, otherwise.
| Author: | Jim Wigginton |
| Copyright: | MMVIII Jim Wigginton |
| License: | http://www.opensource.org/licenses/mit-license.html MIT License |
| Link: | http://phpseclib.sourceforge.net |
| File Size: | 1374 lines (67 kb) |
| Included or required: | 0 times |
| Referenced: | 1 time |
| Includes or requires: | 0 files |
Crypt_Rijndael:: (11 methods):
__construct()
setKey()
setKeyLength()
setBlockLength()
_setupEngine()
_setupMcrypt()
_encryptBlock()
_decryptBlock()
_setupKey()
_subWord()
_setupInlineCrypt()
Class: Crypt_Rijndael - X-Ref
Pure-PHP implementation of Rijndael.| __construct($mode = CRYPT_RIJNDAEL_MODE_CBC) X-Ref |
| Default Constructor. Determines whether or not the mcrypt extension should be used. $mode could be: - CRYPT_RIJNDAEL_MODE_ECB - CRYPT_RIJNDAEL_MODE_CBC - CRYPT_RIJNDAEL_MODE_CTR - CRYPT_RIJNDAEL_MODE_CFB - CRYPT_RIJNDAEL_MODE_OFB If not explictly set, CRYPT_RIJNDAEL_MODE_CBC will be used. param: optional Integer $mode see: Crypt_Base::Crypt_Base() |
| setKey($key) X-Ref |
| Sets the key. Keys can be of any length. Rijndael, itself, requires the use of a key that's between 128-bits and 256-bits long and whose length is a multiple of 32. If the key is less than 256-bits and the key length isn't set, we round the length up to the closest valid key length, padding $key with null bytes. If the key is more than 256-bits, we trim the excess bits. If the key is not explicitly set, it'll be assumed to be all null bytes. Note: 160/224-bit keys must explicitly set by setKeyLength(), otherwise they will be round/pad up to 192/256 bits. param: String $key see: Crypt_Base:setKey() see: setKeyLength() |
| setKeyLength($length) X-Ref |
| Sets the key length Valid key lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount. Note: phpseclib extends Rijndael (and AES) for using 160- and 224-bit keys but they are officially not defined and the most (if not all) implementations are not able using 160/224-bit keys but round/pad them up to 192/256 bits as, for example, mcrypt will do. That said, if you want be compatible with other Rijndael and AES implementations, you should not setKeyLength(160) or setKeyLength(224). Additional: In case of 160- and 224-bit keys, phpseclib will/can, for that reason, not use the mcrypt php extention, even if available. This results then in slower encryption. param: Integer $length |
| setBlockLength($length) X-Ref |
| Sets the block length Valid block lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount. param: Integer $length |
| _setupEngine() X-Ref |
| Setup the fastest possible $engine Determines if the mcrypt (MODE_MCRYPT) $engine available and usable for the current $block_size and $key_size. If not, the slower MODE_INTERNAL $engine will be set. see: setKey() see: setKeyLength() see: setBlockLength() |
| _setupMcrypt() X-Ref |
| Setup the CRYPT_MODE_MCRYPT $engine see: Crypt_Base::_setupMcrypt() |
| _encryptBlock($in) X-Ref |
| Encrypts a block param: String $in return: String |
| _decryptBlock($in) X-Ref |
| Decrypts a block param: String $in return: String |
| _setupKey() X-Ref |
| Setup the key (expansion) see: Crypt_Base::_setupKey() |
| _subWord($word) X-Ref |
| Performs S-Box substitutions param: Integer $word |
| _setupInlineCrypt() X-Ref |
| Setup the performance-optimized function for de/encrypt() see: Crypt_Base::_setupInlineCrypt() |